0000746687 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:GrowthStockRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:InformationTechnologySectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:CompanyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:CounterpartyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:CurrencyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:DebtSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:DerivativesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:LargeCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:ManagementRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:MidCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member oef:RiskNondiversifiedStatusMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:NonUSSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001647Member ssga:UnconstrainedSectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:C000004449Member 2025-01-01 2025-12-31 0000746687 ssga:C000004449Member 2021-01-01 2025-12-31 0000746687 ssga:C000004449Member 2016-01-01 2025-12-31 0000746687 ssga:Russell1000GrowthIndexMember 2025-01-01 2025-12-31 0000746687 ssga:Russell1000GrowthIndexMember 2021-01-01 2025-12-31 0000746687 ssga:Russell1000GrowthIndexMember 2016-01-01 2025-12-31 0000746687 ssga:SP500IndexMember 2025-01-01 2025-12-31 0000746687 ssga:SP500IndexMember 2021-01-01 2025-12-31 0000746687 ssga:SP500IndexMember 2016-01-01 2025-12-31 0000746687 ssga:S000001636Member 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:SmallMidandMicroCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:AssetAllocationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:CompanyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:CounterpartyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:CurrencyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:DebtSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:DerivativesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:GrowthStockRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:InformationTechnologySectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:LiquidityRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:ManagementRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:NonUSSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:UnconstrainedSectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001636Member ssga:ValueStockRiskMember 2025-12-31 2025-12-31 0000746687 ssga:C000004438Member 2025-01-01 2025-12-31 0000746687 ssga:C000004438Member 2021-01-01 2025-12-31 0000746687 ssga:C000004438Member 2016-01-01 2025-12-31 0000746687 ssga:Russell2000IndexMember 2025-01-01 2025-12-31 0000746687 ssga:Russell2000IndexMember 2021-01-01 2025-12-31 0000746687 ssga:Russell2000IndexMember 2016-01-01 2025-12-31 0000746687 ssga:S000001648Member 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:InformationTechnologySectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:IndexingStrategyIndexTrackingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:CounterpartyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:DerivativesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:LargeCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:LiquidityRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:NonDiversificationRiskIndexFundsMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:RiskofInvestmentinOtherPoolsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001648Member ssga:UnconstrainedSectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:C000004450Member 2025-01-01 2025-12-31 0000746687 ssga:C000004450Member 2021-01-01 2025-12-31 0000746687 ssga:C000004450Member 2016-01-01 2025-12-31 0000746687 ssga:S000001639Member 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:InformationTechnologySectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:CompanyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:CounterpartyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:CurrencyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:DebtSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:DerivativesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:GrowthStockRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:LargeCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:ManagementRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:MidCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:NonUSSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:UnconstrainedSectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001639Member ssga:ValueStockRiskMember 2025-12-31 2025-12-31 0000746687 ssga:C000004441Member 2025-01-01 2025-12-31 0000746687 ssga:C000004441Member 2021-01-01 2025-12-31 0000746687 ssga:C000004441Member 2016-01-01 2025-12-31 0000746687 ssga:S000001643Member 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:DebtSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:MortgageRelatedandOtherAssetBackedSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:USGovernmentSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:BelowInvestmentGradeSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:CounterpartyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:CurrencyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:DerivativesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:EmergingMarketsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:LiquidityRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:ManagementRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:MunicipalObligationsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:NonUSSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:PortfolioTurnoverRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:RiskofInvestmentinOtherPoolsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001643Member ssga:ValuationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:C000004445Member 2025-01-01 2025-12-31 0000746687 ssga:C000004445Member 2021-01-01 2025-12-31 0000746687 ssga:C000004445Member 2016-01-01 2025-12-31 0000746687 ssga:BloombergUSAggregateBondIndexMember 2025-01-01 2025-12-31 0000746687 ssga:BloombergUSAggregateBondIndexMember 2021-01-01 2025-12-31 0000746687 ssga:BloombergUSAggregateBondIndexMember 2016-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000033161Member 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:DebtSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:IndexingStrategyIndexTrackingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:AssetAllocationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:BelowInvestmentGradeSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:CommoditiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:CounterpartyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:CurrencyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:CurrencyHedgingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:DerivativesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:EmergingMarketsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:ExchangeTradedFundsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:InflationIndexedSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:LargeCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:LiquidityRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:ManagementRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:ModelingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:MortgageRelatedandOtherAssetBackedSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:NonUSSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:PortfolioTurnoverRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:REITRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:RiskofInvestmentinOtherPoolsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:SmallMidandMicroCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:SovereignDebtObligationsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:USGovernmentSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:ValuationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:ComboMember ssga:C000004439Member 2025-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:C000004439Member 2021-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:C000004439Member 2016-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:C000033161Member 2025-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:C000033161Member 2021-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:C000033161Member 2016-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:SP500IndexMember 2025-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:SP500IndexMember 2021-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:SP500IndexMember 2016-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:MSCIACWIexUSAIndexMember 2025-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:MSCIACWIexUSAIndexMember 2021-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:MSCIACWIexUSAIndexMember 2016-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:BloombergUSAggregateBondIndexMember 2025-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:BloombergUSAggregateBondIndexMember 2021-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:BloombergUSAggregateBondIndexMember 2016-01-01 2025-12-31 0000746687 ssga:S000001638Member 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:DebtSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:REITRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:RealEstateSectorRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:BelowInvestmentGradeSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:LiquidityRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:ManagementRiskMember 2025-12-31 2025-12-31 0000746687 ssga:S000001638Member ssga:ValuationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:C000004440Member 2025-01-01 2025-12-31 0000746687 ssga:C000004440Member 2021-01-01 2025-12-31 0000746687 ssga:C000004440Member 2016-01-01 2025-12-31 0000746687 ssga:FTSENAREITEquityREITsIndexMember 2025-01-01 2025-12-31 0000746687 ssga:FTSENAREITEquityREITsIndexMember 2021-01-01 2025-12-31 0000746687 ssga:FTSENAREITEquityREITsIndexMember 2016-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:DebtSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:IndexingStrategyIndexTrackingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:AssetAllocationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:BelowInvestmentGradeSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:CommoditiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:CounterpartyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:CurrencyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:CurrencyHedgingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:DerivativesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:EmergingMarketsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:ExchangeTradedFundsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:InflationIndexedSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:LargeCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:LiquidityRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:ManagementRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:ModelingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:MortgageRelatedandOtherAssetBackedSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:NonUSSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:PortfolioTurnoverRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:REITRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:RiskofInvestmentinOtherPoolsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:SmallMidandMicroCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:SovereignDebtObligationsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:USGovernmentSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:ValuationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class1Member ssga:C000004439Member 2025-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:C000004439Member 2021-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:C000004439Member 2016-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:SP500IndexMember 2025-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:SP500IndexMember 2021-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:SP500IndexMember 2016-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:MSCIACWIexUSAIndexMember 2025-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:MSCIACWIexUSAIndexMember 2021-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:MSCIACWIexUSAIndexMember 2016-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:BloombergUSAggregateBondIndexMember 2025-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:BloombergUSAggregateBondIndexMember 2021-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:BloombergUSAggregateBondIndexMember 2016-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member oef:RiskLoseMoneyMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member oef:RiskNotInsuredDepositoryInstitutionMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:MarketRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:EquityInvestingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:DebtSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:IndexingStrategyIndexTrackingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:AssetAllocationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:BelowInvestmentGradeSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:CommoditiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:CounterpartyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:CurrencyRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:CurrencyHedgingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:DerivativesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:EmergingMarketsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:ExchangeTradedFundsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:FocusedInvestmentRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:InflationIndexedSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:LargeCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:LargeTransactionsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:LiquidityRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:ManagementRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:ModelingRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:MortgageRelatedandOtherAssetBackedSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:NonUSSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:PortfolioTurnoverRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:REITRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:RiskofInvestmentinOtherPoolsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:SmallMidandMicroCapitalizationSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:SovereignDebtObligationsRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:USGovernmentSecuritiesRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:ValuationRiskMember 2025-12-31 2025-12-31 0000746687 ssga:Class3Member ssga:C000033161Member 2025-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:C000033161Member 2021-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:C000033161Member 2016-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:SP500IndexMember 2025-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:SP500IndexMember 2021-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:SP500IndexMember 2016-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:MSCIACWIexUSAIndexMember 2025-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:MSCIACWIexUSAIndexMember 2021-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:MSCIACWIexUSAIndexMember 2016-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:BloombergUSAggregateBondIndexMember 2025-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:BloombergUSAggregateBondIndexMember 2021-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:BloombergUSAggregateBondIndexMember 2016-01-01 2025-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2016-01-01 2016-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2017-01-01 2017-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2018-01-01 2018-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2019-01-01 2019-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2020-01-01 2020-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2021-01-01 2021-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2022-01-01 2022-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2023-01-01 2023-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2024-01-01 2024-12-31 0000746687 ssga:S000001639Member ssga:C000004441Member 2025-01-01 2025-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2016-01-01 2016-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2017-01-01 2017-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2018-01-01 2018-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2019-01-01 2019-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2020-01-01 2020-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2021-01-01 2021-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2022-01-01 2022-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2023-01-01 2023-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2024-01-01 2024-12-31 0000746687 ssga:S000001647Member ssga:C000004449Member 2025-01-01 2025-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2016-01-01 2016-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2017-01-01 2017-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2018-01-01 2018-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2019-01-01 2019-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2020-01-01 2020-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2021-01-01 2021-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2022-01-01 2022-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2023-01-01 2023-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2024-01-01 2024-12-31 0000746687 ssga:S000001638Member ssga:C000004440Member 2025-01-01 2025-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2016-01-01 2016-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2017-01-01 2017-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2018-01-01 2018-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2019-01-01 2019-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2020-01-01 2020-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2021-01-01 2021-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2022-01-01 2022-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2023-01-01 2023-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2024-01-01 2024-12-31 0000746687 ssga:S000001643Member ssga:C000004445Member 2025-01-01 2025-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2016-01-01 2016-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2017-01-01 2017-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2018-01-01 2018-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2019-01-01 2019-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2020-01-01 2020-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2021-01-01 2021-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2022-01-01 2022-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2023-01-01 2023-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2024-01-01 2024-12-31 0000746687 ssga:S000001636Member ssga:C000004438Member 2025-01-01 2025-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2016-01-01 2016-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2017-01-01 2017-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2018-01-01 2018-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2019-01-01 2019-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2020-01-01 2020-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2021-01-01 2021-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2022-01-01 2022-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2023-01-01 2023-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2024-01-01 2024-12-31 0000746687 ssga:S000001648Member ssga:C000004450Member 2025-01-01 2025-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2016-01-01 2016-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2017-01-01 2017-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2018-01-01 2018-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2019-01-01 2019-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2020-01-01 2020-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2021-01-01 2021-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2022-01-01 2022-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2023-01-01 2023-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2024-01-01 2024-12-31 0000746687 ssga:ComboMember ssga:S000001637Member ssga:C000004439Member 2025-01-01 2025-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2016-01-01 2016-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2017-01-01 2017-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2018-01-01 2018-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2019-01-01 2019-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2020-01-01 2020-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2021-01-01 2021-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2022-01-01 2022-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2023-01-01 2023-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2024-01-01 2024-12-31 0000746687 ssga:Class1Member ssga:S000001637Member ssga:C000004439Member 2025-01-01 2025-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2016-01-01 2016-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2017-01-01 2017-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2018-01-01 2018-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2019-01-01 2019-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2020-01-01 2020-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2021-01-01 2021-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2022-01-01 2022-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2023-01-01 2023-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2024-01-01 2024-12-31 0000746687 ssga:Class3Member ssga:S000001637Member ssga:C000033161Member 2025-01-01 2025-12-31 pure iso4217:USD State Street U.S. EquityV.I.S. Fund State Street PremierGrowth Equity V.I.S. Fund State Street Real EstateSecurities V.I.S. Fund State Street IncomeV.I.S. Fund State Street Small-CapEquity V.I.S. Fund State Street S&P 500Index V.I.S. Fund State Street Total ReturnV.I.S. Fund State Street Total ReturnV.I.S. Fund State Street Total ReturnV.I.S. Fund 2025-12-31 0000746687 false 485BPOS 0.0931 0.1991 -0.0340 0.3177 0.2264 0.2549 -0.1891 0.2791 0.2455 0.1646 0.0247 0.2834 -0.0266 0.3733 0.3361 0.2497 -0.3043 0.4628 0.3106 0.2000 0.0800 0.0584 -0.0571 0.2615 -0.0523 0.4180 -0.2493 0.1350 0.1046 0.0196 0.0298 0.0325 -0.0142 0.0862 0.0703 -0.0181 -0.1438 0.0468 -0.0082 0.0591 0.2377 0.1271 -0.0970 0.2612 0.1453 0.2053 -0.1540 0.1355 0.1032 -0.0025 0.1161 0.2150 -0.0473 0.3105 0.1792 0.2827 -0.1831 0.2596 0.2463 0.1752 0.0635 0.1558 -0.0634 0.1581 0.0644 0.1345 -0.1651 0.1548 0.1131 0.1586 0.0635 0.1558 -0.0634 0.1581 0.0644 0.1345 -0.1651 0.1548 0.1131 0.1586 0.0608 0.1526 -0.0661 0.1557 0.0614 0.1320 -0.1672 0.1521 0.1106 0.1548 N-1A STATE STREET VARIABLE INSURANCE SERIES FUNDS, INC. 2026-05-01 Investment Objective The investment objective of the State Street Premier Growth Equity V.I.S. Fund (the “Fund”) is long-term growth of capital and future income rather than current income. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0065 0.0025 0.0090 “Other Expenses” and “Total Annual Fund Operating Expenses” have been restated to reflect current fees. Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 92 287 498 1108 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 35% of the average value of its portfolio. 0.35 Principal Investment Strategies The Fund seeks to achieve its investment objective by investing at least 80% of its net assets (plus any borrowings for investment purposes) under normal circumstances in equity securities, such as common and preferred stocks. The Fund invests primarily in a limited number of large and medium sized companies (meaning companies with market capitalizations of $2 billion or more) that SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the Fund's investment adviser, believes have above-average growth histories and/or growth potential. The Adviser selects equity securities from a number of industries based on the merits of individual companies, although at times the Fund's investments may be focused in one or more market sectors, such as information technology. In seeking to achieve the Fund's investment objective with respect to future income, the Adviser also may consider companies that currently pay dividends or that have the potential to pay dividends in the future. The Adviser seeks to identify securities of companies that they believe have desirable characteristics for the Fund such as: •above-average annual growth rates; •appropriate capital structures; •leadership in their respective industries; and/or •high quality management focused on generating shareholder value. The Adviser may consider selling a security when one of these characteristics no longer applies, when the Adviser believes that the valuation has become excessive, or when more attractive alternatives are identified. The Fund also may invest up to 25% of its total assets in foreign securities and up to 20% of its net assets (plus any borrowings for investment purposes) in debt securities. The Adviser may also use various types of derivative instruments (such as futures contracts, options and forward contracts) to gain or hedge exposure to certain types of securities as an alternative to investing directly in or selling such securities. The Fund is a non-diversified investment company. You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Growth Stock Risk: The prices of growth stocks may be based largely on expectations of future earnings, and their prices can decline rapidly and significantly in reaction to negative news. Growth stocks may underperform value stocks and stocks in other broad style categories (and the stock market as a whole) over any period of time and may shift in and out of favor with investors generally, sometimes rapidly, depending on changes in market, economic, and other factors. Information Technology Sector Risk: Market or economic factors impacting information technology companies could have a major effect on the value of the Fund's investments. The value of stocks of information technology companies is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. Stocks of technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel. Company Risk: Changes in the financial condition of a company or other issuer, changes in specific market, economic, political, regulatory, geopolitical, and other conditions that affect a particular type of investment or issuer, and changes in general market, economic, political, regulatory, geopolitical and other conditions can adversely affect the price of an investment. The price of securities of smaller, less well-known issuers can be more volatile than the price of securities of larger issuers or the market in general. Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty. Currency Risk: The value of the Fund's assets may be affected favorably or unfavorably by currency exchange rates, currency exchange control regulations, and delays, restrictions or prohibitions on the repatriation of foreign currencies. Foreign currency exchange rates may have significant volatility, and changes in the values of foreign currencies against the U.S. dollar may result in substantial declines in the values of the Fund's assets denominated in foreign currencies. Debt Securities Risk: The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment can lead to heightened levels of volatility and reduced liquidity. Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Large-Capitalization Securities Risk: Returns on investments in securities of large companies could trail the returns on investments in securities of smaller and mid-sized companies. Larger companies may be unable to respond as quickly as smaller and mid-sized companies to competitive challenges or to changes in business, product, financial, or other market conditions. Larger companies may not be able to maintain growth at the high rates that may be achieved by well-managed smaller and mid-sized companies. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. Management Risk: The Fund is actively managed. The Adviser's judgments about the attractiveness, relative value, or potential appreciation of a particular sector, security, commodity or investment strategy or as to a hedging strategy may prove to be incorrect, and may cause the Fund to incur losses. There can be no assurance that the Adviser's investment techniques and decisions will produce the desired results. Mid-Capitalization Securities Risk: The securities of mid-capitalization companies may be more volatile and may involve more risk than the securities of larger companies. These companies may have limited product lines, markets or financial resources, may lack the competitive strength of larger companies, and may depend on a few key employees. In addition, these companies may have been recently organized and may have little or no track record of success. The securities of mid-sized companies may trade less frequently and in smaller volumes than more widely held securities. Some securities of mid-sized issuers may be illiquid or may be restricted as to resale, and their values may be volatile. Non-Diversification Risk: As a “non-diversified” mutual fund, the Fund may hold a smaller number of portfolio securities than many other funds. To the extent the Fund invests in a relatively small number of issuers, a decline in the market value of a particular security held by the Fund may affect its value more than if it invested in a larger number of issuers. The value of Fund Shares may be more volatile than the values of shares of more diversified funds. Non-U.S. Securities Risk: Non-U.S. securities (including depositary receipts) are subject to political, regulatory, and economic risks not present in domestic investments. There may be less information publicly available about a non-U.S. entity than about a U.S. entity, and many non-U.S. entities are not subject to accounting, auditing, legal and financial report standards comparable to those in the United States. Further, such entities and/or their securities may be subject to risks associated with currency controls; expropriation; changes in tax policy; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. Securities traded on foreign markets may be less liquid (harder to sell) than securities traded domestically. Foreign governments may impose restrictions on the repatriation of capital to the U.S. In addition, to the extent that the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund. Investments in depositary receipts may be less liquid and more volatile than the underlying shares in their primary trading market. Unconstrained Sector Risk: The Fund may invest a substantial portion of its assets within one or more economic sectors or industries, which may change from time to time. Greater investment focus on one or more sectors or industries increases the potential for volatility and the risk that events negatively affecting such sectors or industries could reduce returns, potentially causing the value of the Fund's shares to decrease, perhaps significantly. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of (i) a broad measure of market performance and (ii) an additional index that SSGA FM believes more closely reflects the market segment(s) in which the Fund invests. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. Current performance information for the Fund is available toll free by calling(800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of (i) a broad measure of market performance and (ii) an additional index that SSGA FM believes more closely reflects the market segment(s) in which the Fund invests. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return26.23%Q2 2020Lowest Quarterly Return-20.74%Q2 2022 Highest Quarterly Return 0.2623 2020-06-30 Lowest Quarterly Return -0.2074 2022-06-30 Average Annual Total Returns (for periods ended 12/31/25) 0.2000 0.1487 0.1673 0.1856 0.1533 0.1813 0.1788 0.1442 0.1482 Investment Objective The investment objective of the State Street Small-Cap Equity V.I.S. Fund (the “Fund”) is long-term growth of capital. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0095 0.0047 0.0142 Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 145 449 776 1702 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 40% of the average value of its portfolio. 0.40 Principal Investment Strategies The Fund seeks to achieve its investment objective by investing at least 80% of its net assets (plus any borrowings for investment purposes) under normal circumstances in equity securities of small-cap companies, such as common and preferred stocks. The Fund defines a small-cap company as one with a market capitalization that, at the time of initial investment, falls between (a) the market capitalization of the smallest company in the Russell 2000® Index and (b) either the larger of the market capitalization of the largest company in the Russell 2000® Index or $3.0 billion. As of February 28, 2026, the market capitalizations of companies in the Russell 2000® Index ranged from $6.34 million to $39.26 billion. These capitalization ranges will change over time. SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the Fund's investment adviser, or a sub-adviser will not sell a stock merely because the market capitalization of a company in the portfolio moves outside of this capitalization range or because the index capitalization range changes. Because of this, the Fund may have less than 80% of its net assets in equity securities of small-cap companies at any given time. The Adviser and sub-advisers select equity securities from a number of industries based on the merits of individual companies, although at times the Fund's investments may be focused in one or more market sectors, such as information technology.The Fund uses a multi sub-adviser investment strategy that combines growth, value and core investment management styles. SSGA FM will allocate the Fund's assets among the sub-advisers to maintain exposure to a combination of investment styles, but may have larger allocations to certain sub-advisers based on its assessment of the potential for better performance or to address capacity constraints of a particular sub-adviser, among other reasons. As a result, this orientation will typically produce a portfolio that does not materially favor value or growth style investing, and allows the Fund the potential to benefit from both value and growth cycles in the marketplace. The Adviser and sub-advisers seek to identify securities of companies that they believe have desirable characteristics for the Fund such as: •high quality management focused on generating shareholder value; •attractive products or services; •appropriate capital structures; and/or •strong competitive positions in their industries. In addition, a sub-adviser with a value investment style generally will seek to identify securities of companies with characteristics such as attractive valuation, while a sub-adviser with a growth investment style generally will seek to identify securities of companies with strong growth potential. The Adviser and sub-advisers may consider selling a security when one of these characteristics no longer applies, when the Adviser or sub-adviser believes that the valuation has become excessive, or more attractive alternatives are identified.The Fund also may invest up to 20% of its net assets (plus any borrowings for investment purposes) in securities with capitalizations outside the Fund's small-cap range and up to 10% of its total assets in foreign securities. The Fund also may invest up to 20% of its net assets (plus any borrowings for investment purposes) in debt securities and up to 10% in below-investment grade debt securities. The Adviser and sub-advisers may also use various types of derivative instruments (such as futures contracts, options and forward contracts) to gain or hedge exposure to certain types of securities as an alternative to investing directly in or selling such securities. You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terror ism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Small-, Mid-, and Micro-Capitalization Securities Risk: The securities of small-, mid- and micro-capitalization companies may be more volatile and may involve more risk than the securities of larger companies. These companies may have limited product lines, markets or financial resources, may lack the competitive strength of larger companies, and may depend on a few key employees. In addition, these companies may have been recently organized and may have little or no track record of success. The securities of smaller companies may trade less frequently and in smaller volumes than more widely held securities. Some securities of smaller issuers may be illiquid or may be restricted as to resale, and their values may have significant volatility. The Fund may be unable to liquidate its positions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. Returns on investments in securities of small-, mid- and micro-capitalization companies could trail the returns on investments in securities of larger companies. Asset Allocation Risk: The Fund's investment performance depends upon the successful allocation by the Adviser of the Fund's assets among asset classes, geographical regions, industry sectors, and specific issuers and investments. There is no guarantee that the Adviser's allocation techniques and decisions will produce the desired results. Company Risk: Changes in the financial condition of a company or other issuer, changes in specific market, economic, political, regulatory, geopolitical, and other conditions that affect a particular type of investment or issuer, and changes in general market, economic, political, regulatory, geopolitical and other conditions can adversely affect the price of an investment. The price of securities of smaller, less well-known issuers can be more volatile than the price of securities of larger issuers or the market in general. Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty. Currency Risk: The value of the Fund's assets may be affected favorably or unfavorably by currency exchange rates, currency exchange control regulations, and delays, restrictions or prohibitions on the repatriation of foreign currencies. Foreign currency exchange rates may have significant volatility, and changes in the values of foreign currencies against the U.S. dollar may result in substantial declines in the values of the Fund's assets denominated in foreign currencies. Debt Securities Risk: The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment can lead to heightened levels of volatility and reduced liquidity. Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or sub-adviser or may not have the effect on the Fund anticipated by the Adviser or sub-adviser. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Growth Stock Risk: The prices of growth stocks may be based largely on expectations of future earnings, and their prices can decline rapidly and significantly in reaction to negative news. Growth stocks may underperform value stocks and stocks in other broad style categories (and the stock market as a whole) over any period of time and may shift in and out of favor with investors generally, sometimes rapidly, depending on changes in market, economic, and other factors. Information Technology Sector Risk: Market or economic factors impacting information technology companies could have a major effect on the value of the Fund's investments. The value of stocks of information technology companies is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. Stocks of technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. Liquidity Risk: Lack of a ready market, stressed market conditions, or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price or at all. Illiquid investments may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value. Illiquidity of the Fund's holdings may also limit the ability of the Fund to obtain cash to meet redemptions on a timely basis. In addition, the Fund, due to limitations on investments in any illiquid investments and/or the difficulty in purchasing and selling such investments, may be unable to achieve its desired level of exposure to a certain market or sector. Management Risk: The Fund is actively managed by the Adviser and multiple sub-advisers. The Adviser's or sub-advisers' judgments about the attractiveness, relative value, or potential appreciation of a particular sector, security, commodity or investment strategy may prove to be incorrect, and may cause the Fund to incur losses. There can be no assurance that the Adviser's or sub-advisers' investment techniques and decisions will produce the desired results. Additionally, because portions of the Fund's assets are managed by the Adviser and multiple sub-advisers, each using different investment styles, the Fund could engage in overlapping security transactions, potentially leading to the Fund holding a more concentrated position in these securities. Non-U.S. Securities Risk: Non-U.S. securities (including depositary receipts) are subject to political, regulatory, and economic risks not present in domestic investments. There may be less information publicly available about a non-U.S. entity than about a U.S. entity, and many non-U.S. entities are not subject to accounting, auditing, legal and financial report standards comparable to those in the United States. Further, such entities and/or their securities may be subject to risks associated with currency controls; expropriation; changes in tax policy; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. Securities traded on foreign markets may be less liquid (harder to sell) than securities traded domestically. Foreign governments may impose restrictions on the repatriation of capital to the U.S. In addition, to the extent that the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund. Investments in depositary receipts may be less liquid and more volatile than the underlying shares in their primary trading market. Unconstrained Sector Risk: The Fund may invest a substantial portion of its assets within one or more economic sectors or industries, which may change from time to time. Greater investment focus on one or more sectors or industries increases the potential for volatility and the risk that events negatively affecting such sectors or industries could reduce returns, potentially causing the value of the Fund's Shares to decrease, perhaps significantly. Value Stock Risk: A “value” style of investing is subject to the risk that the returns on “value” equity securities are less than returns on other styles of investing or the overall stock market. Value stocks present the risk that they may decline in price or never reach their expected full market value, either because the market fails to recognize a stock's intrinsic worth or the Adviser or sub-adviser overestimates the stock's expected value. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of two broad measures of market performance. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. Current performance information for the Fund is available toll free by calling(800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of two broad measures of market performance. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return28.71%Q4 2020Lowest Quarterly Return-31.46%Q1 2020 Highest Quarterly Return 0.2871 2020-12-31 Lowest Quarterly Return -0.3146 2020-03-31 Average Annual Total Returns (for periods ended 12/31/25) -0.0025 0.0497 0.0877 0.1281 0.0609 0.0962 0.1788 0.1442 0.1482 Investment Objectives The investment objectives of the State Street S&P 500 Index V.I.S. Fund (the “Fund”) are growth of capital and accumulation of income that corresponds to the investment return of the S&P 500® Index. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0025 0.0006 0.0031 Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 32 100 174 393 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 2% of the average value of its portfolio. 0.02 Principal Investment Strategies The Fund uses an index tracking management strategy designed to track the performance of the S&P 500® Index (“S&P 500” or “Index”). The Index is a well-known stock market index that includes common stocks of 500 companies from a number of sectors and that measures the performance of the large-cap sector of the U.S. equities market. As of February 28, 2026, a significant portion of the Index comprised companies in the information technology sector, although this may change from time to time. The Fund is classified as “diversified” under the Investment Company Act of 1940, as amended; however, the Fund may become “non-diversified” solely as a result of tracking the Index (e.g., changes in relative market capitalization or index weighting of one or more component securities). When the Fund is non-diversified, it may invest a relatively high percentage of its assets in a limited number of issuers. The Fund is not managed according to traditional methods of “active” investment management, which involve the buying and selling of securities based upon economic, financial and market analysis and investment judgment. Instead, the Fund, using an “indexing” investment approach, seeks to provide investment results that, before expenses, correspond generally to the total return of the S&P 500. The Fund generally intends to invest in all stocks comprising the S&P 500 in approximate proportion to their weightings in the Index. However, under various circumstances, it may not be possible or practicable to purchase all stocks in those weightings. In those circumstances, the Fund may purchase a sample of the stocks in the Index in proportions expected by SSGA Funds Management, Inc. (the “Adviser” or “SSGA FM”), the investment adviser to the Fund, to match generally the performance of the Index as a whole. In addition, from time to time stocks are added to or removed from the Index. The Fund may sell securities that are represented in the Index, or purchase securities that are not yet represented in the Index, in anticipation of their removal from or addition to the Index. The Fund invests at least 80% of its net assets in equity securities of companies contained in the Index. Shareholders will receive sixty (60) days' notice prior to a change in the 80% investment policy. The notional value of the Fund's investments in derivatives or other synthetic instruments that provide exposures comparable, in the judgment of the Adviser, to investments in the Index may be counted toward satisfaction of this 80% policy. In addition, the Fund may invest in equity securities that are not included in the Index, cash and cash equivalents or money market instruments, such as repurchase agreements and money market funds (including money market funds advised by the Adviser). The Fund may at times purchase or sell futures contracts, or options on those futures, in lieu of investing directly in the stocks making up the Index. The Fund might do so, for example, in order to increase its investment exposure pending investment of cash in the stocks comprising the Index. Alternatively, the Fund might use futures or options on futures to reduce its investment exposure in situations where it intends to sell a portion of the stocks in its portfolio but the sale has not yet been completed. The Fund may also enter into other derivatives transactions, including the use of options or swap transactions, in lieu of investing directly in the stocks making up the Index. The Fund may also, to the extent permitted by applicable law, invest in shares of other mutual funds whose investment objectives and policies are similar to those of the Fund (including funds advised by the Adviser). You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Information Technology Sector Risk: Market or economic factors impacting information technology companies could have a major effect on the value of the Fund's investments. The value of stocks of information technology companies is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. Stocks of technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel. Indexing Strategy/Index Tracking Risk: The Fund is managed with an indexing investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the Index or of the actual securities comprising the Index. This differs from an actively-managed fund, which typically seeks to outperform a benchmark index. As a result, the Fund's performance may be less favorable than that of a portfolio managed using an active investment strategy. The structure and composition of the Index will affect the performance, volatility, and risk of the Index and, consequently, the performance, volatility, and risk of the Fund. While the Adviser seeks to track the performance of the Index (i.e., achieve a high degree of correlation with the Index), the Fund's return may not match the return of the Index. The Fund incurs a number of operating expenses not applicable to the Index, and may incur costs in buying and selling securities. In addition, the Fund may not be fully invested at times, generally as a result of cash flows into or out of the Fund or reserves of cash held by the Fund to meet redemptions. The Adviser may attempt to replicate the Index return by investing in fewer than all of the securities in the Index, or in some securities not included in the Index, potentially increasing the risk of divergence between the Fund's return and that of the Index. Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty. Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Large-Capitalization Securities Risk: Returns on investments in securities of large companies could trail the returns on investments in securities of smaller and mid-sized companies. Larger companies may be unable to respond as quickly as smaller and mid-sized companies to competitive challenges or to changes in business, product, financial, or other market conditions. Larger companies may not be able to maintain growth at the high rates that may be achieved by well-managed smaller and mid-sized companies. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. Liquidity Risk: Lack of a ready market, stressed market conditions, or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price or at all. Illiquid investments may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value. Illiquidity of the Fund's holdings may also limit the ability of the Fund to obtain cash to meet redemptions on a timely basis. In addition, the Fund, due to limitations on investments in any illiquid investments and/or the difficulty in purchasing and selling such investments, may be unable to achieve its desired level of exposure to a certain market or sector. Non-Diversification Risk – Index Funds: To the extent the Fund becomes “non-diversified,” the Fund may hold a smaller number of portfolio securities than many other funds. To the extent the Fund invests in a relatively small number of issuers, a decline in the market value of a particular security held by the Fund may affect its value more than if it invested in a larger number of issuers. The value of the Fund's shares may be more volatile than the values of shares of more diversified funds. The Fund may become non-diversified for periods of time solely as a result of tracking the Index (e.g., changes in relative market capitalization or index weighting of one or more component securities). Risk of Investment in Other Pools: When the Fund invests in another pooled investment vehicle (e.g., a mutual fund or exchange-traded fund), it is exposed to the risk that the other pool will not perform as expected and is exposed indirectly to all of the risks applicable to an investment in such other pool. The investment policies of the other pool may not be the same as those of the Fund; as a result, an investment in the other pool may be subject to additional or different risks than those to which the Fund is typically subject. The Fund bears its proportionate share of the fees and expenses of any pool in which it invests. The Adviser or an affiliate may serve as investment adviser to a pool in which the Fund may invest, leading to potential conflicts of interest. It is possible that other clients of the Adviser or its affiliates will purchase or sell interests in a pool sponsored or managed by the Adviser or its affiliates at prices and at times more favorable than those at which the Fund does so. Unconstrained Sector Risk: The Fund may invest a substantial portion of its assets within one or more economic sectors or industries, which may change from time to time. Greater investment focus on one or more sectors or industries increases the potential for volatility and the risk that events negatively affecting such sectors or industries could reduce returns, potentially causing the value of the Fund's shares to decrease, perhaps significantly. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with the Index, a broad measure of market performance. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. Current performance information for the Fund is available toll free by calling(800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with the Index, a broad measure of market performance. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return20.49%Q2 2020Lowest Quarterly Return-19.78%Q1 2020 Highest Quarterly Return 0.2049 2020-06-30 Lowest Quarterly Return -0.1978 2020-03-31 Average Annual Total Returns (for periods ended 12/31/25) 0.1752 0.1409 0.1446 0.1788 0.1442 0.1482 Investment Objective The investment objective of the State Street U.S. Equity V.I.S. Fund (the “Fund”) is long-term growth of capital. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0055 0.0039 0.0094 Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 96 300 520 1155 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 39% of the average value of its portfolio. 0.39 Principal Investment Strategies The Fund seeks to achieve its investment objective by investing at least 80% of its net assets (plus any borrowings for investment purposes) under normal circumstances in equity securities of U.S. companies, such as common and preferred stocks. The Fund considers a company to be a U.S. company if it generates at least 50% of its revenues or profits from business activities in the U.S., has at least 50% of its assets situated in the U.S., or has the principal trading market for its securities in the U.S. The Fund is designed to produce a broadly diversified portfolio, and typically has characteristics similar to the S&P 500® Index, including average market capitalization and dividend yield potential. At times, the Fund's investments may be focused in one or more market sectors, such as information technology. Through fundamental company research involving analyzing financial statements and other information about a company, SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the Fund's investment adviser, primarily seeks to identify securities of large and medium sized companies (meaning companies with market capitalizations of $2 billion or more) that they believe have desirable characteristics for the Fund such as: •low valuations in relation to their peers, the market, their historical valuations or their growth rate potential; •appropriate capital structures; and/or •high quality management focused on generating shareholder value. The Adviser may consider selling a security when one of these characteristics no longer applies, when the Adviser believes that the valuation has become excessive, or when more attractive alternatives are identified. The Fund also may invest up to 15% of its net assets (plus any borrowings for investment purposes) in foreign securities and up to 20% of its net assets (plus any borrowings for investment purposes) in debt securities. The Adviser may also use various types of derivative instruments (such as futures contracts, options and forward contracts) to gain or hedge exposure to certain types of securities as an alternative to investing directly in or selling such securities. You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Information Technology Sector Risk: Market or economic factors impacting information technology companies could have a major effect on the value of the Fund's investments. The value of stocks of information technology companies is particularly vulnerable to rapid changes in technology product cycles, rapid product obsolescence, government regulation and competition, both domestically and internationally, including competition from foreign competitors with lower production costs. Like other technology companies, information technology companies may have limited product lines, markets, financial resources or personnel. Stocks of technology companies and companies that rely heavily on technology, especially those of smaller, less-seasoned companies, tend to be more volatile than the overall market. Information technology companies are heavily dependent on patent and intellectual property rights, the loss or impairment of which may adversely affect profitability. Additionally, companies in the information technology sector may face dramatic and often unpredictable changes in growth rates and competition for the services of qualified personnel. Company Risk: Changes in the financial condition of a company or other issuer, changes in specific market, economic, political, regulatory, geopolitical, and other conditions that affect a particular type of investment or issuer, and changes in general market, economic, political, regulatory, geopolitical and other conditions can adversely affect the price of an investment. The price of securities of smaller, less well-known issuers can be more volatile than the price of securities of larger issuers or the market in general. Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty. Currency Risk: The value of the Fund's assets may be affected favorably or unfavorably by currency exchange rates, currency exchange control regulations, and delays, restrictions or prohibitions on the repatriation of foreign currencies. Foreign currency exchange rates may have significant volatility, and changes in the values of foreign currencies against the U.S. dollar may result in substantial declines in the values of the Fund's assets denominated in foreign currencies. Debt Securities Risk: The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment can lead to heightened levels of volatility and reduced liquidity. Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Growth Stock Risk: The prices of growth stocks may be based largely on expectations of future earnings, and their prices can decline rapidly and significantly in reaction to negative news. Growth stocks may underperform value stocks and stocks in other broad style categories (and the stock market as a whole) over any period of time and may shift in and out of favor with investors generally, sometimes rapidly, depending on changes in market, economic, and other factors. Large-Capitalization Securities Risk: Returns on investments in securities of large companies could trail the returns on investments in securities of smaller and mid-sized companies. Larger companies may be unable to respond as quickly as smaller and mid-sized companies to competitive challenges or to changes in business, product, financial, or other market conditions. Larger companies may not be able to maintain growth at the high rates that may be achieved by well-managed smaller and mid-sized companies. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. Management Risk: The Fund is actively managed. The Adviser's judgments about the attractiveness, relative value, or potential appreciation of a particular sector, security, commodity or investment strategy or as to a hedging strategy may prove to be incorrect, and may cause the Fund to incur losses. There can be no assurance that the Adviser's investment techniques and decisions will produce the desired results. Mid-Capitalization Securities Risk: The securities of mid-capitalization companies may be more volatile and may involve more risk than the securities of larger companies. These companies may have limited product lines, markets or financial resources, may lack the competitive strength of larger companies, and may depend on a few key employees. In addition, these companies may have been recently organized and may have little or no track record of success. The securities of mid-sized companies may trade less frequently and in smaller volumes than more widely held securities. Some securities of mid-sized issuers may be illiquid or may be restricted as to resale, and their values may be volatile. Non-U.S. Securities Risk: Non-U.S. securities (including depositary receipts) are subject to political, regulatory, and economic risks not present in domestic investments. There may be less information publicly available about a non-U.S. entity than about a U.S. entity, and many non-U.S. entities are not subject to accounting, auditing, legal and financial report standards comparable to those in the United States. Further, such entities and/or their securities may be subject to risks associated with currency controls; expropriation; changes in tax policy; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. Securities traded on foreign markets may be less liquid (harder to sell) than securities traded domestically. Foreign governments may impose restrictions on the repatriation of capital to the U.S. In addition, to the extent that the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund. Investments in depositary receipts may be less liquid and more volatile than the underlying shares in their primary trading market. Unconstrained Sector Risk: The Fund may invest a substantial portion of its assets within one or more economic sectors or industries, which may change from time to time. Greater investment focus on one or more sectors or industries increases the potential for volatility and the risk that events negatively affecting such sectors or industries could reduce returns, potentially causing the value of the Fund's shares to decrease, perhaps significantly. Value Stock Risk: A “value” style of investing is subject to the risk that the returns on “value” equity securities are less than returns on other styles of investing or the overall stock market. Value stocks present the risk that they may decline in price or never reach their expected full market value, either because the market fails to recognize a stock's intrinsic worth or the Adviser overestimates the stock's expected value. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with those of a broad measure of market performance. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. Current performance information for the Fund is available toll free by calling(800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with those of a broad measure of market performance. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return21.27%Q2 2020Lowest Quarterly Return-17.82%Q1 2020 Highest Quarterly Return 0.2127 2020-06-30 Lowest Quarterly Return -0.1782 2020-03-31 Average Annual Total Returns (for periods ended 12/31/25) 0.1646 0.1355 0.1447 0.1788 0.1442 0.1482 Investment Objective The investment objective of the State Street Income V.I.S. Fund (the “Fund”) is maximum income consistent with prudent investment management and the preservation of capital. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0050 0.0111 0.0001 0.0162 -0.0001 0.0161 “Total Annual Fund Operating Expenses” and “Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements” have been restated to reflect current fees. Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the “Financial Highlights” section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above. April 30, 2027 Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The calculation of costs for the one year period takes into account the effect of any current contractual fee waivers and/or reimbursements; and the calculation of costs for the remaining periods takes such fee waivers and/or reimbusements into account for the first year of each such period. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 164 510 880 1921 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 47% of the average value of its portfolio. 0.47 Principal Investment Strategies The Fund seeks to achieve its investment objective by investing at least 80% of its net assets (plus any borrowings for investment purposes) under normal circumstances in debt securities. The Fund invests primarily in a variety of investment-grade debt securities, such as mortgage-backed securities, corporate bonds, U.S. Government securities and money market instruments. The Fund normally has a weighted average effective maturity of approximately five to ten years, but is subject to no limitation with respect to the maturities of the instruments in which it may invest. U.S. Government securities are securities that are issued or guaranteed as to principal or interest by the U.S. Government or one of its agencies or instrumentalities. Some U.S. Government securities are backed by the full faith and credit of the U.S. Government, such as U.S. Treasury bills and notes and obligations of the Government National Mortgage Association (“Ginnie Mae”). Other U.S. Government securities are neither issued by nor guaranteed by the full faith and credit of the U.S. Government, including those issued by the Federal National Mortgage Association (“Fannie Mae”) and the Federal Home Loan Mortgage Corporation (“Freddie Mac”). Fannie Mae and Freddie Mac have been operating under a conservatorship since 2008, with the Federal Housing Finance Agency acting as their conservator, and receive certain financing support from and have access to certain borrowing arrangements with the U.S. Treasury. The Fund's investment adviser, SSGA Funds Management, Inc. (the “Adviser” or “SSGA FM”) seeks to identify debt securities that they believe have desirable characteristics for the Fund such as: •attractive yields and prices; •the potential for capital appreciation; and/or •reasonable credit quality. The Adviser may consider selling a security when one of these characteristics no longer applies, when the Adviser believes that the valuation has become excessive, or when more attractive alternatives are identified. The Fund also may invest up to 45% of its net assets in securities rated BBB or below by S&P Global Ratings (“S&P”) or Baa or below by Moody's Investor Services, Inc. (“Moody's”) or of similar quality and up to 20% of its net assets in high yield securities (also known as below investment grade bonds or “junk bonds”). The Fund may also invest in exchange-traded products (“ETPs”) that provide exposure to such investments, including ETPs that pay fees to the Adviser and its affiliates for management, marketing or other services. High yield securities are those rated BB+ through B- by S&P or Ba1 through B3 by Moody's or below or of similar quality. The Fund also may invest up to 35% of its total assets in foreign (including emerging markets) debt securities, and up to 20% of its net assets (plus any borrowings for investment purposes) in equity securities. The Fund may also invest in municipal obligations and asset-backed securities. The Adviser may also use various types of derivative instruments (such as futures contracts, interest rate and credit default swaps, options and forward contracts) to manage yield, duration (a measure of a bond price's sensitivity to a given change in interest rates) and exposure to credit quality, and to gain or hedge exposure to certain securities, indices or market segments.The Fund may engage in active and frequent trading of its portfolio securities. You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Debt Securities Risk: The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment can lead to heightened levels of volatility and reduced liquidity. Mortgage-Related and Other Asset-Backed Securities Risk: Investments in mortgage-related and other asset-backed securities are subject to the risk of significant credit downgrades, illiquidity, and defaults to a greater extent than many other types of fixed-income investments. The liquidity of mortgage-related and asset-backed securities may change over time. During periods of falling interest rates, mortgage- and asset-backed securities may be called or prepaid, which may result in the Fund having to reinvest proceeds in other investments at a lower interest rate. During periods of rising interest rates, the average life of mortgage- and asset-backed securities may extend, which may lock in a below-market interest rate, increase the security's duration and interest rate sensitivity, and reduce the value of the security. Enforcing rights against the underlying assets or collateral may be difficult, and the underlying assets or collateral may be insufficient if the issuer defaults. U.S. Government Securities Risk: Certain U.S. government securities are supported by the full faith and credit of the United States; others are supported by the right of the issuer to borrow from the U.S. Treasury; others are supported by the discretionary authority of the U.S. government to purchase the agency's obligations; and still others are supported only by the credit of the issuing agency, instrumentality, or enterprise. Although U.S. government-sponsored enterprises such as the Federal Home Loan Mortgage Corporation (“Freddie Mac”) and the Federal National Mortgage Association (“Fannie Mae”) may be chartered or sponsored by Congress, they are not funded by Congressional appropriations, and their securities are not issued by the U.S. Treasury, are not supported by the full faith and credit of the U.S. government, and involve increased credit risks. Below Investment-Grade Securities Risk: Lower-quality debt securities (“high yield” or “junk” bonds) are considered predominantly speculative, and can involve a substantially greater risk of default than higher quality debt securities. Issuers of lower-quality debt securities may have substantially greater risk of insolvency or bankruptcy than issuers of higher-quality debt securities. They can be illiquid, and their values can have significant volatility and may decline significantly over short periods of time. Lower-quality debt securities tend to be more sensitive to adverse news about the issuer, or the market or economy in general. Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty. Currency Risk: The value of the Fund's assets may be affected favorably or unfavorably by currency exchange rates, currency exchange control regulations, and delays, restrictions or prohibitions on the repatriation of foreign currencies. Foreign currency exchange rates may have significant volatility, and changes in the values of foreign currencies against the U.S. dollar may result in substantial declines in the values of the Fund's assets denominated in foreign currencies. Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser. Emerging Markets Risk: Risks of investing in emerging markets include, among others, greater political and economic instability, greater volatility in currency exchange rates, less developed securities markets, increased potential for market manipulation, possible trade barriers, currency transfer restrictions, a more limited number of potential buyers and issuers, an emerging market country's dependence on revenue from particular commodities or international aid, less governmental supervision and regulation, unavailability of currency hedging techniques, differences in auditing and financial reporting standards, less stringent investor protection and disclosure standards, less developed public health systems, and less developed legal systems. There is also the potential for unfavorable action such as expropriation, nationalization, embargoes, and acts of war. The securities of emerging market companies may trade less frequently and in smaller volumes than more widely held securities. Market disruptions or substantial market corrections may limit very significantly the liquidity of securities of certain companies in a particular country or geographic region, or of all companies in the country or region. The Fund may be unable to liquidate its positions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. These risks are generally greater for investments in frontier market countries, which typically have smaller economies or less developed capital markets than traditional emerging market countries. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. Liquidity Risk: Lack of a ready market, stressed market conditions, or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price or at all. Illiquid investments may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value. Illiquidity of the Fund's holdings may also limit the ability of the Fund to obtain cash to meet redemptions on a timely basis. In addition, the Fund, due to limitations on investments in any illiquid investments and/or the difficulty in purchasing and selling such investments, may be unable to achieve its desired level of exposure to a certain market or sector. Management Risk: The Fund is actively managed. The Adviser's judgments about the attractiveness, relative value, or potential appreciation of a particular sector, security, commodity or investment strategy or as to a hedging strategy may prove to be incorrect, and may cause the Fund to incur losses. There can be no assurance that the Adviser's investment techniques and decisions will produce the desired results. Municipal Obligations Risk: Issuers, including governmental issuers, may be unable to pay their obligations as they come due. The values of municipal obligations may be adversely affected by local political and economic conditions and developments. In addition, the values of municipal obligations that depend on a specific revenue source to fund their payment obligations may fluctuate as a result of actual or anticipated changes in the cash flows generated by the revenue source or changes in the priority of the municipal obligation to receive the cash flows generated by the revenue source. Municipal obligations may be more susceptible to downgrades or defaults during recessions or similar periods of economic stress. The secondary market for municipal obligations also tends to be less well-developed and less liquid than many other securities markets, which may limit the Fund's ability to sell its municipal obligations at attractive prices, particularly in stressed market conditions. The differences between the price at which an obligation can be purchased and the price at which it can be sold may widen during periods of market distress. Less liquid obligations can become more difficult to value and be subject to erratic price movements. In addition, changes in U.S. federal tax laws or the activity of an issuer may adversely affect the tax-exempt status of municipal obligations. Loss of tax-exempt status may result in a significant decline in the values of such municipal obligations. Non-U.S. Securities Risk: Non-U.S. securities (including depositary receipts) are subject to political, regulatory, and economic risks not present in domestic investments. There may be less information publicly available about a non-U.S. entity than about a U.S. entity, and many non-U.S. entities are not subject to accounting, auditing, legal and financial report standards comparable to those in the United States. Further, such entities and/or their securities may be subject to risks associated with currency controls; expropriation; changes in tax policy; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. Securities traded on foreign markets may be less liquid (harder to sell) than securities traded domestically. Foreign governments may impose restrictions on the repatriation of capital to the U.S. In addition, to the extent that the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund. Investments in depositary receipts may be less liquid and more volatile than the underlying shares in their primary trading market. Portfolio Turnover Risk: Frequent purchases and sales of portfolio securities may result in higher Fund expenses. Risk of Investment in Other Pools: When the Fund invests in another pooled investment vehicle (e.g., a mutual fund or exchange-traded fund), it is exposed to the risk that the other pool will not perform as expected and is exposed indirectly to all of the risks applicable to an investment in such other pool. The investment policies of the other pool may not be the same as those of the Fund; as a result, an investment in the other pool may be subject to additional or different risks than those to which the Fund is typically subject. The Fund bears its proportionate share of the fees and expenses of any pool in which it invests. The Adviser or an affiliate may serve as investment adviser to a pool in which the Fund may invest, leading to potential conflicts of interest. It is possible that other clients of the Adviser or its affiliates will purchase or sell interests in a pool sponsored or managed by the Adviser or its affiliates at prices and at times more favorable than those at which the Fund does so. Valuation Risk: Certain portfolio holdings may be valued on the basis of factors other than market quotations. This may occur more often in times of market turmoil or reduced liquidity. There are multiple methods that can be used to value a portfolio holding when market quotations are not readily available. The value established for any portfolio holding at a point in time might differ from what would be produced using a different methodology or if it had been priced using market quotations. Portfolio holdings that are valued using techniques other than market quotations, including “fair valued” securities, may be subject to greater fluctuation in their valuations from one day to the next than if market quotations were used. In addition, there is no assurance that the Fund could sell or close out a portfolio position for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio position is sold or closed out at a discount to the valuation established by the Fund at that time. Investors who purchase or redeem Fund Shares on days when the Fund is holding fair-valued investments may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the Fund had not fair-valued the holding(s) or had used a different valuation methodology. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with those of a broad measure of market performance. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. Current performance information for the Fund is available toll free by calling(800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with those of a broad measure of market performance. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return7.33%Q4 2023Lowest Quarterly Return-6.58%Q1 2022 Highest Quarterly Return 0.0733 2023-12-31 Lowest Quarterly Return -0.0658 2022-03-31 Average Annual Total Returns (for periods ended 12/31/25) 0.0591 -0.0156 0.0120 0.0730 -0.0036 0.0201 Investment Objective The investment objective of the State Street Total Return V.I.S. Fund (the “Fund”) is to seek the highest total return, composed of current income and capital appreciation, as is consistent with prudent investment risk. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0035 0.0035 0.0025 0.0025 0.0025 0.0010 0.0010 0.0070 0.0095 Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the “Financial Highlights” section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above. Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 72 224 390 871 97 303 525 1166 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 95% of the average value of its portfolio. 0.95 Principal Investment Strategies The Fund seeks to achieve its investment objective by constructing a broadly diversified portfolio that provides exposure to three primary asset classes either directly or indirectly through investment in exchange-traded funds (“ETFs”), including ETFs that pay fees to SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the Fund's investment adviser, and its affiliates for management, marketing or other services: (1) U.S. and foreign (non-U.S.) equity securities (the “Equity Class”); (2) U.S. and foreign (non-U.S.) debt securities (the “Fixed Income Class”); and (3) alternative-style investments (the “Alternative Class”). SSGA FM allocates the Fund's assets among the following sub-asset classes in proportions consistent with the potential returns and risks of each sub-asset class as well as the allocations that, in SSGA FM's view, will best meet the Fund's investment objective: •Equity Class — Sub-Asset Classes: U.S. large cap equity securities; U.S. small- and mid-cap equity securities; foreign (non-U.S.) developed market equity securities; and emerging market equity securities. •Fixed Income Class — Sub-Asset Classes: U.S. government securities, U.S. investment-grade credit securities, and U.S. securitized fixed-income securities (mortgage-backed and asset-backed securities); treasury inflation-protected securities (“TIPS”); high yield securities (also known as “junk bonds”); and sovereign debt obligations. •Alternative Class — Sub-Asset Classes: real estate investment trusts (“REITs”) and commodities. Under normal circumstances, the Fund anticipates maintaining an overall strategic target allocation range of 50%-70% of its assets in the Equity Class, 30%-50% of its assets in the Fixed Income Class, and 0%-5% of its assets in the Alternative Class. SSGA FM reviews these target allocations at least annually and may make changes over time when it believes it is beneficial to the Fund, including, but not limited to, adding or removing sub-asset classes or underlying ETFs, changing the sub-asset class target allocations, or maintaining the target allocations for longer or shorter periods of time. In addition, SSGA FM may from time to time make tactical adjustments to the Fund's allocation to a particular sub-asset class to pursue short to intermediate term opportunities based on a broad range of market and economic conditions, and a combination of quantitative and fundamental inputs. As a result of these tactical adjustments, the Fund's actual allocations may deviate from the overall strategic target allocations and, during certain periods, such deviations may be significant. SSGA FM employs an “indexing” investment approach to assets allocated to the Equity, Fixed Income and Alternative Classes. SSGA FM divides the Classes into the sub-classes described above, and for each sub-class seeks to track the performance of an applicable market index. Under this investment approach, the Fund invests directly or through investment in ETFs either (1) in substantially all of the securities in an index in approximately the same proportion as the index (a “replication” strategy) or (2) in a representative sample of securities that collectively has an investment profile similar to an index (a “representative sampling” strategy). In a representative sampling strategy, the securities selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of the index, and the Fund might or might not hold, directly or through investment in ETFs, all of the securities that comprise the index. For additional information regarding the investment process used to manage the Classes, including the sub-asset classes and applicable market indices, see the “More on the Underlying Investment Indices of the State Street Total Return V.I.S. Fund” section of this Prospectus. SSGA FM may gain exposure to the various sub-asset classes by investing directly in individual securities or through investment in ETFs managed by SSGA FM or its affiliates as well as those managed by unaffiliated investment managers. The Fund (or the ETFs in which the Fund invests) may also use derivative instruments (including options, futures contracts, options on futures, interest rate swaps, credit default swaps, and forward contracts) to gain or hedge exposure to a certain type of security or broad-based index as an alternative to investing directly in or selling such type of security or the securities representing such index. The Fund may hold cash or invest in money market instruments, principally for the preservation of capital, income potential or maintenance of liquidity. You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Debt Securities Risk: The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment can lead to heightened levels of volatility and reduced liquidity. Indexing Strategy/Index Tracking Risk: The Fund is managed with an indexing investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the Index or of the actual securities comprising the Index. This differs from an actively-managed fund, which typically seeks to outperform a benchmark index. As a result, the Fund's performance may be less favorable than that of a portfolio managed using an active investment strategy. The structure and composition of the Index will affect the performance, volatility, and risk of the Index and, consequently, the performance, volatility, and risk of the Fund. While the Adviser seeks to track the performance of the Index (i.e., achieve a high degree of correlation with the Index), the Fund's return may not match the return of the Index. The Fund incurs a number of operating expenses not applicable to the Index, and may incur costs in buying and selling securities. In addition, the Fund may not be fully invested at times, generally as a result of cash flows into or out of the Fund or reserves of cash held by the Fund to meet redemptions. The Adviser may attempt to replicate the Index return by investing in fewer than all of the securities in the Index, or in some securities not included in the Index, potentially increasing the risk of divergence between the Fund's return and that of the Index. Asset Allocation Risk: The Fund's investment performance depends upon the successful allocation by the Adviser of the Fund's assets among asset classes, geographical regions, industry sectors, and specific issuers and investments. There is no guarantee that the Adviser's allocation techniques and decisions will produce the desired results. Below Investment-Grade Securities Risk: Lower-quality debt securities (“high yield” or “junk” bonds) are considered predominantly speculative, and can involve a substantially greater risk of default than higher quality debt securities. Issuers of lower-quality debt securities may have substantially greater risk of insolvency or bankruptcy than issuers of higher-quality debt securities. They can be illiquid, and their values can have significant volatility and may decline significantly over short periods of time. Lower-quality debt securities tend to be more sensitive to adverse news about the issuer, or the market or economy in general. Commodities Risk: Commodity prices can have significant volatility, and exposure to commodities can cause the net asset value (“NAV”) of Fund Shares to decline or fluctuate in a rapid and unpredictable manner. A liquid secondary market may not exist for certain commodity investments, which may make it difficult for the Fund to sell them at a desirable price or at the price at which it is carrying them. Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty. Currency Risk: The value of the Fund's assets may be affected favorably or unfavorably by currency exchange rates, currency exchange control regulations, and delays, restrictions or prohibitions on the repatriation of foreign currencies. Foreign currency exchange rates may have significant volatility, and changes in the values of foreign currencies against the U.S. dollar may result in substantial declines in the values of the Fund's assets denominated in foreign currencies. Currency Hedging Risk: If the Fund enters into currency hedging transactions, any loss generated by those transactions generally should be substantially offset by gains on the hedged investment, and vice versa. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains. Hedges are sometimes subject to imperfect matching between the hedging transaction and the risk sought to be hedged. There can be no assurance that the Fund's hedging transactions will be effective. Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser. Emerging Markets Risk: Risks of investing in emerging markets include, among others, greater political and economic instability, greater volatility in currency exchange rates, less developed securities markets, increased potential for market manipulation, possible trade barriers, currency transfer restrictions, a more limited number of potential buyers and issuers, an emerging market country's dependence on revenue from particular commodities or international aid, less governmental supervision and regulation, unavailability of currency hedging techniques, differences in auditing and financial reporting standards, less stringent investor protection and disclosure standards, less developed public health systems, and less developed legal systems. There is also the potential for unfavorable action such as expropriation, nationalization, embargoes, and acts of war. The securities of emerging market companies may trade less frequently and in smaller volumes than more widely held securities. Market disruptions or substantial market corrections may limit very significantly the liquidity of securities of certain companies in a particular country or geographic region, or of all companies in the country or region. The Fund may be unable to liquidate its positions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. These risks are generally greater for investments in frontier market countries, which typically have smaller economies or less developed capital markets than traditional emerging market countries. Exchange-Traded Funds Risk: The Fund is subject to substantially the same risks as those associated with the direct ownership of the securities represented by an underlying ETF in which it invests. In addition, the shares of an underlying ETF may trade at a premium or discount to their intrinsic value (i.e., the market value may differ from the NAV of an ETF's shares) for a number of reasons. For example, supply and demand for shares of an underlying ETF or market disruptions may cause the market price of the underlying ETF to deviate from the value of the underlying ETF's investments, which may be exacerbated in less liquid markets. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Inflation-Indexed Securities Risk: The principal amount of an inflation-indexed security typically increases with inflation and decreases with deflation, as measured by a specified index. It is possible that, in a period of declining inflation rates, the Fund could receive at maturity less than the initial principal amount of an inflation-indexed security. Changes in the values of inflation-indexed securities may be difficult to predict, and it is possible that an investment in such securities will have an effect different from that anticipated by the Adviser. Large-Capitalization Securities Risk: Returns on investments in securities of large companies could trail the returns on investments in securities of smaller and mid-sized companies. Larger companies may be unable to respond as quickly as smaller and mid-sized companies to competitive challenges or to changes in business, product, financial, or other market conditions. Larger companies may not be able to maintain growth at the high rates that may be achieved by well-managed smaller and mid-sized companies. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. Liquidity Risk: Lack of a ready market, stressed market conditions, or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price or at all. Illiquid investments may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value. Illiquidity of the Fund's holdings may also limit the ability of the Fund to obtain cash to meet redemptions on a timely basis. In addition, the Fund, due to limitations on investments in any illiquid investments and/or the difficulty in purchasing and selling such investments, may be unable to achieve its desired level of exposure to a certain market or sector. Management Risk: The Fund is actively managed. The Adviser's judgments about the attractiveness, relative value, or potential appreciation of a particular sector, security, commodity or investment strategy or as to a hedging strategy may prove to be incorrect, and may cause the Fund to incur losses. There can be no assurance that the Adviser's investment techniques and decisions will produce the desired results. Modeling Risk: The Adviser uses quantitative models in an effort to enhance returns and manage risk. Any imperfections, errors or limitations in these models could limit any benefit to the Fund from the use of the models, or could result in incorrect outputs or in investment outcomes different from or opposite to those expected or desired by the Adviser. There can be no assurance that the models will behave as expected in all market conditions. In addition, computer programming used to create quantitative models, or the data on which such models operate, might contain one or more errors. Mortgage-Related and Other Asset-Backed Securities Risk: Investments in mortgage-related and other asset-backed securities are subject to the risk of significant credit downgrades, illiquidity, and defaults to a greater extent than many other types of fixed-income investments. The liquidity of mortgage-related and asset-backed securities may change over time. During periods of falling interest rates, mortgage- and asset-backed securities may be called or prepaid, which may result in the Fund having to reinvest proceeds in other investments at a lower interest rate. During periods of rising interest rates, the average life of mortgage- and asset-backed securities may extend, which may lock in a below-market interest rate, increase the security's duration and interest rate sensitivity, and reduce the value of the security. Enforcing rights against the underlying assets or collateral may be difficult, and the underlying assets or collateral may be insufficient if the issuer defaults. Non-U.S. Securities Risk: Non-U.S. securities (including depositary receipts) are subject to political, regulatory, and economic risks not present in domestic investments. There may be less information publicly available about a non-U.S. entity than about a U.S. entity, and many non-U.S. entities are not subject to accounting, auditing, legal and financial report standards comparable to those in the United States. Further, such entities and/or their securities may be subject to risks associated with currency controls; expropriation; changes in tax policy; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. Securities traded on foreign markets may be less liquid (harder to sell) than securities traded domestically. Foreign governments may impose restrictions on the repatriation of capital to the U.S. In addition, to the extent that the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund. Investments in depositary receipts may be less liquid and more volatile than the underlying shares in their primary trading market. Portfolio Turnover Risk: Frequent purchases and sales of portfolio securities may result in higher Fund expenses. REIT Risk: REITs are subject to the risks associated with investing in the securities of real property companies. In particular, REITs may be affected by changes in the values of the underlying properties that they own or operate. Further, REITs are dependent upon specialized management skills, and their investments may be concentrated in relatively few properties, or in a small geographic area or a single property type. REITs are also subject to heavy cash flow dependency and, as a result, are particularly reliant on the proper functioning of capital markets. A variety of economic and other factors may adversely affect a lessee's ability to meet its obligations to a REIT. In the event of a default by a lessee, the REIT may experience delays in enforcing its rights as a lessor and may incur substantial costs associated in protecting its investments. In addition, a REIT could fail to qualify for favorable regulatory treatment. Risk of Investment in Other Pools: When the Fund invests in another pooled investment vehicle (e.g., a mutual fund or exchange-traded fund), it is exposed to the risk that the other pool will not perform as expected and is exposed indirectly to all of the risks applicable to an investment in such other pool. The investment policies of the other pool may not be the same as those of the Fund; as a result, an investment in the other pool may be subject to additional or different risks than those to which the Fund is typically subject. The Fund bears its proportionate share of the fees and expenses of any pool in which it invests. The Adviser or an affiliate may serve as investment adviser to a pool in which the Fund may invest, leading to potential conflicts of interest. It is possible that other clients of the Adviser or its affiliates will purchase or sell interests in a pool sponsored or managed by the Adviser or its affiliates at prices and at times more favorable than those at which the Fund does so. Small-, Mid-, and Micro-Capitalization Securities Risk: The securities of small-, mid- and micro-capitalization companies may be more volatile and may involve more risk than the securities of larger companies. These companies may have limited product lines, markets or financial resources, may lack the competitive strength of larger companies, and may depend on a few key employees. In addition, these companies may have been recently organized and may have little or no track record of success. The securities of smaller companies may trade less frequently and in smaller volumes than more widely held securities. Some securities of smaller issuers may be illiquid or may be restricted as to resale, and their values may have significant volatility. The Fund may be unable to liquidate its posi tions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. Returns on investments in securities of small-, mid- and micro-capitalization companies could trail the returns on investments in securities of larger companies. Sovereign Debt Obligations Risk: Investments in debt securities issued by governments or by government agencies and instrumentalities involve the risk that the governmental entities responsible for repayment may be unable or unwilling to pay interest and repay principal when due. Any restructuring of a sovereign debt obligation held by the Fund will likely have a significant adverse effect on the value of the obligation. In the event of default of sovereign debt, the Fund may be unable to pursue legal action against the sovereign issuer or to realize on collateral securing the debt. U.S. Government Securities Risk: Certain U.S. government securities are supported by the full faith and credit of the United States; others are supported by the right of the issuer to borrow from the U.S. Treasury; others are supported by the discretionary authority of the U.S. government to purchase the agency's obligations; and still others are supported only by the credit of the issuing agency, instrumentality, or enterprise. Although U.S. government-sponsored enterprises such as the Federal Home Loan Mortgage Corporation (“Freddie Mac”) and the Federal National Mortgage Association (“Fannie Mae”) may be chartered or sponsored by Congress, they are not funded by Congressional appropriations, and their securities are not issued by the U.S. Treasury, are not supported by the full faith and credit of the U.S. government, and involve increased credit risks. Valuation Risk: Certain portfolio holdings may be valued on the basis of factors other than market quotations. This may occur more often in times of market turmoil or reduced liquidity. There are multiple methods that can be used to value a portfolio holding when market quotations are not readily available. The value established for any portfolio holding at a point in time might differ from what would be produced using a different methodology or if it had been priced using market quotations. Portfolio holdings that are valued using techniques other than market quotations, including “fair valued” securities, may be subject to greater fluctuation in their valuations from one day to the next than if market quotations were used. In addition, there is no assurance that the Fund could sell or close out a portfolio position for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio position is sold or closed out at a discount to the valuation established by the Fund at that time. Investors who purchase or redeem Fund Shares on days when the Fund is holding fair-valued investments may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the Fund had not fair-valued the holding(s) or had used a different valuation methodology. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of three broad measures of market performance. The bar chart shows the performance of the Fund's Class 1 Shares. On August 1, 2018, the Fund changed to its current principal investment strategies. If the Fund's current principal investment strategies had been in place for these prior periods, performance information shown may have been different. The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.Current performance information for the Fund is available toll free by calling (800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of three broad measures of market performance. The bar chart shows the performance of the Fund's Class 1 Shares. On August 1, 2018, the Fund changed to its current principal investment strategies. If the Fund's current principal investment strategies had been in place for these prior periods, performance information shown may have been different. The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return11.66%Q2 2020Lowest Quarterly Return-16.97%Q1 2020 Highest Quarterly Return 0.1166 2020-06-30 Lowest Quarterly Return -0.1697 2020-03-31 Average Annual Total Returns (for periods ended 12/31/25) 0.1586 0.0712 0.0719 0.1548 0.0685 0.0691 0.1788 0.1442 0.1482 0.3239 0.0791 0.0842 0.0730 -0.0036 0.0201 Investment Objective The investment objective of the State Street Real Estate Securities V.I.S. Fund (the “Fund”) is maximum total return through current income and capital appreciation. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0085 0.0041 0.0126 Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 128 400 692 1523 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 30% of the average value of its portfolio. 0.30 Principal Investment Strategies The Fund seeks to achieve its investment objective by investing at least 80% of its net assets (plus any borrowings for investment purposes) under normal circumstances in equity securities, such as common and preferred stocks, and debt securities of U.S. issuers that are principally engaged in or related to the real estate industry, including those that own significant real estate assets. Shareholders will receive sixty (60) days' notice prior to a change in the 80% investment policy. The Fund does not invest directly in real estate. The Fund considers an issuer to be “principally engaged in” or “principally related to” the real estate industry if at least 50% of its assets (marked-to-market), gross income or net profits are attributable to development, ownership, construction, management or sale of residential, commercial or industrial real estate, or to products or services related to the real estate industry. Issuers engaged in the real estate industry include equity real estate investment trusts (“REITs”), mort gage REITs, real estate brokers and developers, companies that manage real estate and companies that own substantial amounts of real estate. Issuers in businesses related to the real estate industry include manufacturers and distributors of building supplies and financial institutions that issue or service mortgages. The Fund also may invest to a lesser extent in equity securities and debt securities of issuers outside the real estate industry. The Fund also may invest up to 35% of its assets in high yield securities (also known as “junk bonds”) and up to 20% of its assets in foreign securities. You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Debt Securities Risk: The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment can lead to heightened levels of volatility and reduced liquidity. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. REIT Risk: REITs are subject to the risks associated with investing in the securities of real property companies. In particular, REITs may be affected by changes in the values of the underlying properties that they own or operate. Further, REITs are dependent upon specialized management skills, and their investments may be concentrated in relatively few properties, or in a small geographic area or a single property type. REITs are also subject to heavy cash flow dependency and, as a result, are particularly reliant on the proper functioning of capital markets. A variety of economic and other factors may adversely affect a lessee's ability to meet its obligations to a REIT. In the event of a default by a lessee, the REIT may experience delays in enforcing its rights as a lessor and may incur substantial costs associated in protecting its investments. In addition, a REIT could fail to qualify for favorable regulatory treatment. Real Estate Sector Risk: An investment in a real property company may be subject to risks similar to those associated with direct ownership of real estate, including, by way of example, the possibility of declines in the value of real estate, losses from casualty or condemnation, and changes in local and general economic conditions, supply and demand, interest rates, environmental liability, zoning laws, regulatory limitations on rents, property taxes, and operating expenses. Some real property companies have limited diversification because they invest in a limited number of properties, a narrow geographic area, or a single type of property. Below Investment-Grade Securities Risk: Lower-quality debt securities (“high yield” or “junk” bonds) are considered predominantly speculative, and can involve a substantially greater risk of default than higher quality debt securities. Issuers of lower-quality debt securities may have substantially greater risk of insolvency or bankruptcy than issuers of higher-quality debt securities. They can be illiquid, and their values can have significant volatility and may decline significantly over short periods of time. Lower-quality debt securities tend to be more sensitive to adverse news about the issuer, or the market or economy in general. Liquidity Risk: Lack of a ready market, stressed market conditions, or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price or at all. Illiquid investments may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value. Illiquidity of the Fund's holdings may also limit the ability of the Fund to obtain cash to meet redemptions on a timely basis. In addition, the Fund, due to limitations on investments in any illiquid investments and/or the difficulty in purchasing and selling such investments, may be unable to achieve its desired level of exposure to a certain market or sector. Management Risk: The Fund is actively managed. The Adviser or sub-adviser's judgments about the attractiveness, relative value, or potential appreciation of a particular sector, security, commodity or investment strategy or as to a hedging strategy may prove to be incorrect, and may cause the Fund to incur losses. There can be no assurance that the Adviser or sub-adviser's investment techniques and decisions will produce the desired results. Valuation Risk: Certain portfolio holdings may be valued on the basis of factors other than market quotations. This may occur more often in times of market turmoil or reduced liquidity. There are multiple methods that can be used to value a portfolio holding when market quotations are not readily available. The value established for any portfolio holding at a point in time might differ from what would be produced using a different methodology or if it had been priced using market quotations. Portfolio holdings that are valued using techniques other than market quotations, including “fair valued” securities, may be subject to greater fluctuation in their valuations from one day to the next than if market quotations were used. In addition, there is no assurance that the Fund could sell or close out a portfolio position for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio position is sold or closed out at a discount to the valuation established by the Fund at that time. Investors who purchase or redeem Fund Shares on days when the Fund is holding fair-valued investments may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the Fund had not fair-valued the holding(s) or had used a different valuation methodology. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of (i) a broad measure of market performance and (ii) an additional index that SSGA FM believes more closely reflects the market segment(s) in which the Fund invests. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. Current performance information for the Fund is available toll free by calling(800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of (i) a broad measure of market performance and (ii) an additional index that SSGA FM believes more closely reflects the market segment(s) in which the Fund invests. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return16.90%Q3 2024Lowest Quarterly Return-24.92%Q1 2020 Highest Quarterly Return 0.1690 2024-09-30 Lowest Quarterly Return -0.2492 2020-03-31 Average Annual Total Returns (for periods ended 12/31/25) 0.0196 0.0636 0.0578 0.0288 0.0663 0.0570 0.1788 0.1442 0.1482 Investment Objective The investment objective of the State Street Total Return V.I.S. Fund (the “Fund”) is to seek the highest total return, composed of current income and capital appreciation, as is consistent with prudent investment risk. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0035 0.0025 0.0010 0.0070 Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the “Financial Highlights” section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above. Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 72 224 390 871 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 95% of the average value of its portfolio. 0.95 Principal Investment Strategies The Fund seeks to achieve its investment objective by constructing a broadly diversified portfolio that provides exposure to three primary asset classes either directly or indirectly through investment in exchange-traded funds (“ETFs”), including ETFs that pay fees to SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the Fund's investment adviser, and its affiliates for management, marketing or other services: (1) U.S. and foreign (non-U.S.) equity securities (the “Equity Class”); (2) U.S. and foreign (non-U.S.) debt securities (the “Fixed Income Class”); and (3) alternative-style investments (the “Alternative Class”). SSGA FM allocates the Fund's assets among the following sub-asset classes in proportions consistent with the potential returns and risks of each sub-asset class as well as the allocations that, in SSGA FM's view, will best meet the Fund's investment objective: •Equity Class — Sub-Asset Classes: U.S. large cap equity securities; U.S. small- and mid-cap equity securities; foreign (non-U.S.) developed market equity securities; and emerging market equity securities. •Fixed Income Class — Sub-Asset Classes: U.S. government securities, U.S. investment-grade credit securities, and U.S. securitized fixed-income securities (mortgage-backed and asset-backed securities); treasury inflation-protected securities (“TIPS”); high yield securities (also known as “junk bonds”); and sovereign debt obligations. •Alternative Class — Sub-Asset Classes: real estate investment trusts (“REITs”) and commodities. Under normal circumstances, the Fund anticipates maintaining an overall strategic target allocation range of 50%-70% of its assets in the Equity Class, 30%-50% of its assets in the Fixed Income Class, and 0%-5% of its assets in the Alternative Class. SSGA FM reviews these target allocations at least annually and may make changes over time when it believes it is beneficial to the Fund, including, but not limited to, adding or removing sub-asset classes or underlying ETFs, changing the sub-asset class target allocations, or maintaining the target allocations for longer or shorter periods of time. In addition, SSGA FM may from time to time make tactical adjustments to the Fund's allocation to a particular sub-asset class to pursue short to intermediate term opportunities based on a broad range of market and economic conditions, and a combination of quantitative and fundamental inputs. As a result of these tactical adjustments, the Fund's actual allocations may deviate from the overall strategic target allocations and, during certain periods, such deviations may be significant. SSGA FM employs an “indexing” investment approach to assets allocated to the Equity, Fixed Income and Alternative Classes. SSGA FM divides the Classes into the sub-classes described above, and for each sub-class seeks to track the performance of an applicable market index. Under this investment approach, the Fund invests directly or through investment in ETFs either (1) in substantially all of the securities in an index in approximately the same proportion as the index (a “replication” strategy) or (2) in a representative sample of securities that collectively has an investment profile similar to an index (a “representative sampling” strategy). In a representative sampling strategy, the securities selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of the index, and the Fund might or might not hold, directly or through investment in ETFs, all of the securities that comprise the index. For additional information regarding the investment process used to manage the Classes, including the sub-asset classes and applicable market indices, see the “More on the Underlying Investment Indices” section of this Prospectus. SSGA FM may gain exposure to the various sub-asset classes by investing directly in individual securities or through investment in ETFs managed by SSGA FM or its affiliates as well as those managed by unaffiliated investment managers. The Fund (or the ETFs in which the Fund invests) may also use derivative instruments (including options, futures contracts, options on futures, interest rate swaps, credit default swaps, and forward contracts) to gain or hedge exposure to a certain type of security or broad-based index as an alternative to investing directly in or selling such type of security or the securities representing such index. The Fund may hold cash or invest in money market instruments, principally for the preservation of capital, income potential or maintenance of liquidity. You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaran teed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Debt Securities Risk: The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment can lead to heightened levels of volatility and reduced liquidity. Indexing Strategy/Index Tracking Risk: The Fund is managed with an indexing investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the Index or of the actual securities comprising the Index. This differs from an actively-managed fund, which typically seeks to outperform a benchmark index. As a result, the Fund's performance may be less favorable than that of a portfolio managed using an active investment strategy. The structure and composition of the Index will affect the performance, volatility, and risk of the Index and, consequently, the performance, volatility, and risk of the Fund. While the Adviser seeks to track the performance of the Index (i.e., achieve a high degree of correlation with the Index), the Fund's return may not match the return of the Index. The Fund incurs a number of operating expenses not applicable to the Index, and may incur costs in buying and selling securities. In addition, the Fund may not be fully invested at times, generally as a result of cash flows into or out of the Fund or reserves of cash held by the Fund to meet redemptions. The Adviser may attempt to replicate the Index return by investing in fewer than all of the securities in the Index, or in some securities not included in the Index, potentially increasing the risk of divergence between the Fund's return and that of the Index. Asset Allocation Risk: The Fund's investment performance depends upon the successful allocation by the Adviser of the Fund's assets among asset classes, geographical regions, industry sectors, and specific issuers and investments. There is no guarantee that the Adviser's allocation techniques and decisions will produce the desired results. Below Investment-Grade Securities Risk: Lower-quality debt securities (“high yield” or “junk” bonds) are considered predominantly speculative, and can involve a substantially greater risk of default than higher quality debt securities. Issuers of lower-quality debt securities may have substantially greater risk of insolvency or bankruptcy than issuers of higher-quality debt securities. They can be illiquid, and their values can have significant volatility and may decline significantly over short periods of time. Lower-quality debt securities tend to be more sensitive to adverse news about the issuer, or the market or economy in general. Commodities Risk: Commodity prices can have significant volatility, and exposure to commodities can cause the net asset value (“NAV”) of Fund Shares to decline or fluctuate in a rapid and unpredictable manner. A liquid secondary market may not exist for certain commodity investments, which may make it difficult for the Fund to sell them at a desirable price or at the price at which it is carrying them. Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty. Currency Risk: The value of the Fund's assets may be affected favorably or unfavorably by currency exchange rates, currency exchange control regulations, and delays, restrictions or prohibitions on the repatriation of foreign currencies. Foreign currency exchange rates may have significant volatility, and changes in the values of foreign currencies against the U.S. dollar may result in substantial declines in the values of the Fund's assets denominated in foreign currencies. Currency Hedging Risk: If the Fund enters into currency hedging transactions, any loss generated by those transactions generally should be substantially offset by gains on the hedged investment, and vice versa. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains. Hedges are sometimes subject to imperfect matching between the hedging transaction and the risk sought to be hedged. There can be no assurance that the Fund's hedging transactions will be effective. Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser. Emerging Markets Risk: Risks of investing in emerging markets include, among others, greater political and economic instability, greater volatility in currency exchange rates, less developed securities markets, increased potential for market manipulation, possible trade barriers, currency transfer restrictions, a more limited number of potential buyers and issuers, an emerging market country's dependence on revenue from particular commodities or international aid, less governmental supervision and regulation, unavailability of currency hedging techniques, differences in auditing and financial reporting standards, less stringent investor protection and disclosure standards, less developed public health systems, and less developed legal systems. There is also the potential for unfavorable action such as expropriation, nationalization, embargoes, and acts of war. The securities of emerging market companies may trade less frequently and in smaller volumes than more widely held securities. Market disruptions or substantial market corrections may limit very significantly the liquidity of securities of certain companies in a particular country or geographic region, or of all companies in the country or region. The Fund may be unable to liquidate its positions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. These risks are generally greater for investments in frontier market countries, which typically have smaller economies or less developed capital markets than traditional emerging market countries. Exchange-Traded Funds Risk: The Fund is subject to substantially the same risks as those associated with the direct ownership of the securities represented by an underlying ETF in which it invests. In addition, the shares of an underlying ETF may trade at a premium or discount to their intrinsic value (i.e., the market value may differ from the NAV of an ETF's shares) for a number of reasons. For example, supply and demand for shares of an underlying ETF or market disruptions may cause the market price of the underlying ETF to deviate from the value of the underlying ETF's investments, which may be exacerbated in less liquid markets. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Inflation-Indexed Securities Risk: The principal amount of an inflation-indexed security typically increases with inflation and decreases with deflation, as measured by a specified index. It is possible that, in a period of declining inflation rates, the Fund could receive at maturity less than the initial principal amount of an inflation-indexed security. Changes in the values of inflation-indexed securities may be difficult to predict, and it is possible that an investment in such securities will have an effect different from that anticipated by the Adviser. Large-Capitalization Securities Risk: Returns on investments in securities of large companies could trail the returns on investments in securities of smaller and mid-sized companies. Larger companies may be unable to respond as quickly as smaller and mid-sized companies to competitive challenges or to changes in business, product, financial, or other market conditions. Larger companies may not be able to maintain growth at the high rates that may be achieved by well-managed smaller and mid-sized companies. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. Liquidity Risk: Lack of a ready market, stressed market conditions, or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price or at all. Illiquid investments may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value. Illiquidity of the Fund's holdings may also limit the ability of the Fund to obtain cash to meet redemptions on a timely basis. In addition, the Fund, due to limitations on investments in any illiquid investments and/or the difficulty in purchasing and selling such investments, may be unable to achieve its desired level of exposure to a certain market or sector. Management Risk: The Fund is actively managed. The Adviser's judgments about the attractiveness, relative value, or potential appreciation of a particular sector, security, commodity or investment strategy or as to a hedging strategy may prove to be incorrect, and may cause the Fund to incur losses. There can be no assurance that the Adviser's investment techniques and decisions will produce the desired results. Modeling Risk: The Adviser uses quantitative models in an effort to enhance returns and manage risk. Any imperfections, errors or limitations in these models could limit any benefit to the Fund from the use of the models, or could result in incorrect outputs or in investment outcomes different from or opposite to those expected or desired by the Adviser. There can be no assurance that the models will behave as expected in all market conditions. In addition, computer programming used to create quantitative models, or the data on which such models operate, might contain one or more errors. Mortgage-Related and Other Asset-Backed Securities Risk: Investments in mortgage-related and other asset-backed securities are subject to the risk of significant credit downgrades, illiquidity, and defaults to a greater extent than many other types of fixed-income investments. The liquidity of mortgage-related and asset-backed securities may change over time. During periods of falling interest rates, mortgage- and asset-backed securities may be called or prepaid, which may result in the Fund having to reinvest proceeds in other investments at a lower interest rate. During periods of rising interest rates, the average life of mortgage- and asset-backed securities may extend, which may lock in a below-market interest rate, increase the security's duration and interest rate sensitivity, and reduce the value of the security. Enforcing rights against the underlying assets or collateral may be difficult, and the underlying assets or collateral may be insufficient if the issuer defaults. Non-U.S. Securities Risk: Non-U.S. securities (including depositary receipts) are subject to political, regulatory, and economic risks not present in domestic investments. There may be less information publicly available about a non-U.S. entity than about a U.S. entity, and many non-U.S. entities are not subject to accounting, auditing, legal and financial report standards comparable to those in the United States. Further, such entities and/or their securities may be subject to risks associated with currency controls; expropriation; changes in tax policy; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. Securities traded on foreign markets may be less liquid (harder to sell) than securities traded domestically. Foreign governments may impose restrictions on the repatriation of capital to the U.S. In addition, to the extent that the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund. Investments in depositary receipts may be less liquid and more volatile than the underlying shares in their primary trading market. Portfolio Turnover Risk: Frequent purchases and sales of portfolio securities may result in higher Fund expenses. REIT Risk: REITs are subject to the risks associated with investing in the securities of real property companies. In particular, REITs may be affected by changes in the values of the underlying properties that they own or operate. Further, REITs are dependent upon specialized management skills, and their investments may be concentrated in relatively few properties, or in a small geographic area or a single property type. REITs are also subject to heavy cash flow dependency and, as a result, are particularly reliant on the proper functioning of capital markets. A variety of economic and other factors may adversely affect a lessee's ability to meet its obligations to a REIT. In the event of a default by a lessee, the REIT may experience delays in enforcing its rights as a lessor and may incur substantial costs associated in protecting its investments. In addition, a REIT could fail to qualify for favorable regulatory treatment. Risk of Investment in Other Pools: When the Fund invests in another pooled investment vehicle (e.g., a mutual fund or exchange-traded fund), it is exposed to the risk that the other pool will not perform as expected and is exposed indirectly to all of the risks applicable to an investment in such other pool. The investment policies of the other pool may not be the same as those of the Fund; as a result, an investment in the other pool may be subject to additional or different risks than those to which the Fund is typically subject. The Fund bears its proportionate share of the fees and expenses of any pool in which it invests. The Adviser or an affiliate may serve as investment adviser to a pool in which the Fund may invest, leading to potential conflicts of interest. It is possible that other clients of the Adviser or its affiliates will purchase or sell interests in a pool sponsored or managed by the Adviser or its affiliates at prices and at times more favorable than those at which the Fund does so. Small-, Mid-, and Micro-Capitalization Securities Risk: The securities of small-, mid- and micro-capitalization companies may be more volatile and may involve more risk than the securities of larger companies. These companies may have limited product lines, markets or financial resources, may lack the competitive strength of larger companies, and may depend on a few key employees. In addition, these companies may have been recently organized and may have little or no track record of success. The securities of smaller companies may trade less frequently and in smaller volumes than more widely held securities. Some securities of smaller issuers may be illiquid or may be restricted as to resale, and their values may have significant volatility. The Fund may be unable to liquidate its positions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. Returns on investments in securities of small-, mid- and micro-capitalization companies could trail the returns on investments in securities of larger companies. Sovereign Debt Obligations Risk: Investments in debt securities issued by governments or by government agencies and instrumentalities involve the risk that the governmental entities responsible for repayment may be unable or unwilling to pay interest and repay principal when due. Any restructuring of a sovereign debt obligation held by the Fund will likely have a significant adverse effect on the value of the obligation. In the event of default of sovereign debt, the Fund may be unable to pursue legal action against the sovereign issuer or to realize on collateral securing the debt. U.S. Government Securities Risk: Certain U.S. government securities are supported by the full faith and credit of the United States; others are supported by the right of the issuer to borrow from the U.S. Treasury; others are supported by the discretionary authority of the U.S. government to purchase the agency's obligations; and still others are supported only by the credit of the issuing agency, instrumentality, or enterprise. Although U.S. government-sponsored enterprises such as the Federal Home Loan Mortgage Corporation (“Freddie Mac”) and the Federal National Mortgage Association (“Fannie Mae”) may be chartered or sponsored by Congress, they are not funded by Congressional appropriations, and their securities are not issued by the U.S. Treasury, are not supported by the full faith and credit of the U.S. government, and involve increased credit risks. Valuation Risk: Certain portfolio holdings may be valued on the basis of factors other than market quotations. This may occur more often in times of market turmoil or reduced liquidity. There are multiple methods that can be used to value a portfolio holding when market quotations are not readily available. The value established for any portfolio holding at a point in time might differ from what would be produced using a different methodology or if it had been priced using market quotations. Portfolio holdings that are valued using techniques other than market quotations, including “fair valued” securities, may be subject to greater fluctuation in their valuations from one day to the next than if market quotations were used. In addition, there is no assurance that the Fund could sell or close out a portfolio position for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio position is sold or closed out at a discount to the valuation established by the Fund at that time. Investors who purchase or redeem Fund Shares on days when the Fund is holding fair-valued investments may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the Fund had not fair-valued the holding(s) or had used a different valuation methodology. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of three broad measures of market performance. The bar chart shows the performance of the Fund's Class 1 Shares. On August 1, 2018, the Fund changed to its current principal investment strategies. If the Fund's current principal investment strategies had been in place for these prior periods, performance information shown may have been different. The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.Current performance information for the Fund is available toll free by calling (800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of three broad measures of market performance. The bar chart shows the performance of the Fund's Class 1 Shares. On August 1, 2018, the Fund changed to its current principal investment strategies. If the Fund's current principal investment strategies had been in place for these prior periods, performance information shown may have been different. The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return11.66%Q2 2020Lowest Quarterly Return-16.97%Q1 2020 Highest Quarterly Return 0.1166 2020-06-30 Lowest Quarterly Return -0.1697 2020-03-31 Average Annual Total Returns (for periods ended 12/31/25) 0.1586 0.0712 0.0719 0.1788 0.1442 0.1482 0.3239 0.0791 0.0842 0.0730 -0.0036 0.0201 Investment Objective The investment objective of the State Street Total Return V.I.S. Fund (the “Fund”) is to seek the highest total return, composed of current income and capital appreciation, as is consistent with prudent investment risk. Fees and Expenses of the Fund The tables below describe the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (“Fund Shares”), but does not reflect the fees or charges imposed by the separate accounts (“Accounts”) of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, the costs shown below would be higher. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries which are not reflected in the tables and examples below. Shareholder Fees (fees paid directly from your investment) 0 0 Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) 0.0035 0.0025 0.0025 0.0010 0.0095 Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the “Financial Highlights” section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above. Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated, and then sell or hold all of your Fund Shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same. The Example does not reflect the fees or charges imposed by the Accounts of the various life insurance companies through which shares of the Fund are offered. If these fees and charges were included, the expenses shown below would be higher. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 97 303 525 1166 Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in Annual Fund Operating Expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 95% of the average value of its portfolio. 0.95 Principal Investment Strategies The Fund seeks to achieve its investment objective by constructing a broadly diversified portfolio that provides exposure to three primary asset classes either directly or indirectly through investment in exchange-traded funds (“ETFs”), including ETFs that pay fees to SSGA Funds Management, Inc. (“SSGA FM” or the “Adviser”), the Fund's investment adviser, and its affiliates for management, marketing or other services: (1) U.S. and foreign (non-U.S.) equity securities (the “Equity Class”); (2) U.S. and foreign (non-U.S.) debt securities (the “Fixed Income Class”); and (3) alternative-style investments (the “Alternative Class”). SSGA FM allocates the Fund's assets among the following sub-asset classes in proportions consistent with the potential returns and risks of each sub-asset class as well as the allocations that, in SSGA FM's view, will best meet the Fund's investment objective: •Equity Class — Sub-Asset Classes: U.S. large cap equity securities; U.S. small- and mid-cap equity securities; foreign (non-U.S.) developed market equity securities; and emerging market equity securities. •Fixed Income Class — Sub-Asset Classes: U.S. government securities, U.S. investment-grade credit securities, and U.S. securitized fixed-income securities (mortgage-backed and asset-backed securities); treasury inflation-protected securities (“TIPS”); high yield securities (also known as “junk bonds”); and sovereign debt obligations. •Alternative Class — Sub-Asset Classes: real estate investment trusts (“REITs”) and commodities. Under normal circumstances, the Fund anticipates maintaining an overall strategic target allocation range of 50%-70% of its assets in the Equity Class, 30%-50% of its assets in the Fixed Income Class, and 0%-5% of its assets in the Alternative Class. SSGA FM reviews these target allocations at least annually and may make changes over time when it believes it is beneficial to the Fund, including, but not limited to, adding or removing sub-asset classes or underlying ETFs, changing the sub-asset class target allocations, or maintaining the target allocations for longer or shorter periods of time. In addition, SSGA FM may from time to time make tactical adjustments to the Fund's allocation to a particular sub-asset class to pursue short to intermediate term opportunities based on a broad range of market and economic conditions, and a combination of quantitative and fundamental inputs. As a result of these tactical adjustments, the Fund's actual allocations may deviate from the overall strategic target allocations and, during certain periods, such deviations may be significant. SSGA FM employs an “indexing” investment approach to assets allocated to the Equity, Fixed Income and Alternative Classes. SSGA FM divides the Classes into the sub-classes described above, and for each sub-class seeks to track the performance of an applicable market index. Under this investment approach, the Fund invests directly or through investment in ETFs either (1) in substantially all of the securities in an index in approximately the same proportion as the index (a “replication” strategy) or (2) in a representative sample of securities that collectively has an investment profile similar to an index (a “representative sampling” strategy). In a representative sampling strategy, the securities selected are expected to have, in the aggregate, investment characteristics (based on factors such as market capitalization and industry weightings), fundamental characteristics (such as return variability and yield) and liquidity measures similar to those of the index, and the Fund might or might not hold, directly or through investment in ETFs, all of the securities that comprise the index. For additional information regarding the investment process used to manage the Classes, including the sub-asset classes and applicable market indices, see the “More on the Underlying Investment Indices” section of this Prospectus. SSGA FM may gain exposure to the various sub-asset classes by investing directly in individual securities or through investment in ETFs managed by SSGA FM or its affiliates as well as those managed by unaffiliated investment managers. The Fund (or the ETFs in which the Fund invests) may also use derivative instruments (including options, futures contracts, options on futures, interest rate swaps, credit default swaps, and forward contracts) to gain or hedge exposure to a certain type of security or broad-based index as an alternative to investing directly in or selling such type of security or the securities representing such index. The Fund may hold cash or invest in money market instruments, principally for the preservation of capital, income potential or maintenance of liquidity. You could lose money by investing in the Fund. An investment in the Fund is subject to investment risks, including possible loss of principal, is not a deposit in a bank and is not insured or guaran teed by the Federal Deposit Insurance Corporation (“FDIC”) or any other government agency. Market Risk: The Fund's investments are subject to changes in general economic conditions, general market fluctuations and the risks inherent in investment in securities markets. Investment markets can be volatile and prices of investments can change substantially due to various factors including, but not limited to, economic growth or recession, changes in interest rates, inflation, changes in the actual or perceived creditworthiness of issuers, and general market liquidity. The Fund is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Local, regional or global events such as war, military conflicts, acts of terrorism, trade policy changes or disputes, the threat or actual imposition of tariffs, natural disasters, the spread of infectious illness or other public health issues, or other events could have a significant impact on the Fund and its investments. Equity Investing Risk: The market prices of equity securities owned by the Fund may go up or down, sometimes rapidly or unpredictably. The value of a security may decline for a number of reasons that may directly relate to the issuer and also may decline due to general industry or market conditions that are not specifically related to a particular company. In addition, equity markets tend to move in cycles, which may cause stock prices to fall over short or extended periods of time. Debt Securities Risk: The values of debt securities may increase or decrease as a result of the following: market fluctuations, changes in interest rates, actual or perceived inability or unwillingness of issuers, guarantors or liquidity providers to make scheduled principal or interest payments, or illiquidity in debt securities markets. To the extent that interest rates rise, certain underlying obligations may be paid off substantially slower than originally anticipated and the value of those securities may fall sharply. A rising interest rate environment may cause the value of the Fund's fixed income securities to decrease, an adverse impact on the liquidity of the Fund's fixed income securities, and increased volatility of the fixed income markets. During periods when interest rates are at low levels, the Fund's yield can be low, and the Fund may have a negative yield (i.e., it may lose money on an operating basis). To the extent that interest rates fall, certain underlying obligations may be paid off substantially faster than originally anticipated. If the principal on a debt obligation is prepaid before expected, the prepayments of principal may have to be reinvested in obligations paying interest at lower rates. During periods of falling interest rates, the income received by the Fund may decline. Changes in interest rates will likely have a greater effect on the values of debt securities of longer durations. Returns on investments in debt securities could trail the returns on other investment options, including investments in equity securities. High levels of inflation and/or a significantly changing interest rate environment can lead to heightened levels of volatility and reduced liquidity. Indexing Strategy/Index Tracking Risk: The Fund is managed with an indexing investment strategy, attempting to track the performance of an unmanaged index of securities, regardless of the current or projected performance of the Index or of the actual securities comprising the Index. This differs from an actively-managed fund, which typically seeks to outperform a benchmark index. As a result, the Fund's performance may be less favorable than that of a portfolio managed using an active investment strategy. The structure and composition of the Index will affect the performance, volatility, and risk of the Index and, consequently, the performance, volatility, and risk of the Fund. While the Adviser seeks to track the performance of the Index (i.e., achieve a high degree of correlation with the Index), the Fund's return may not match the return of the Index. The Fund incurs a number of operating expenses not applicable to the Index, and may incur costs in buying and selling securities. In addition, the Fund may not be fully invested at times, generally as a result of cash flows into or out of the Fund or reserves of cash held by the Fund to meet redemptions. The Adviser may attempt to replicate the Index return by investing in fewer than all of the securities in the Index, or in some securities not included in the Index, potentially increasing the risk of divergence between the Fund's return and that of the Index. Asset Allocation Risk: The Fund's investment performance depends upon the successful allocation by the Adviser of the Fund's assets among asset classes, geographical regions, industry sectors, and specific issuers and investments. There is no guarantee that the Adviser's allocation techniques and decisions will produce the desired results. Below Investment-Grade Securities Risk: Lower-quality debt securities (“high yield” or “junk” bonds) are considered predominantly speculative, and can involve a substantially greater risk of default than higher quality debt securities. Issuers of lower-quality debt securities may have substantially greater risk of insolvency or bankruptcy than issuers of higher-quality debt securities. They can be illiquid, and their values can have significant volatility and may decline significantly over short periods of time. Lower-quality debt securities tend to be more sensitive to adverse news about the issuer, or the market or economy in general. Commodities Risk: Commodity prices can have significant volatility, and exposure to commodities can cause the net asset value (“NAV”) of Fund Shares to decline or fluctuate in a rapid and unpredictable manner. A liquid secondary market may not exist for certain commodity investments, which may make it difficult for the Fund to sell them at a desirable price or at the price at which it is carrying them. Counterparty Risk: The Fund will be subject to credit risk with respect to the counterparties with which the Fund enters into derivatives contracts, repurchase agreements, reverse repurchase agreements, and other transactions. If a counterparty fails to meet its contractual obligations, the Fund may be unable to terminate or realize any gain on the investment or transaction, or to recover collateral posted to the counterparty, resulting in a loss to the Fund. If the Fund holds collateral posted by its counterparty, it may be delayed or prevented from realizing on the collateral in the event of a bankruptcy or insolvency proceeding relating to the counterparty. Currency Risk: The value of the Fund's assets may be affected favorably or unfavorably by currency exchange rates, currency exchange control regulations, and delays, restrictions or prohibitions on the repatriation of foreign currencies. Foreign currency exchange rates may have significant volatility, and changes in the values of foreign currencies against the U.S. dollar may result in substantial declines in the values of the Fund's assets denominated in foreign currencies. Currency Hedging Risk: If the Fund enters into currency hedging transactions, any loss generated by those transactions generally should be substantially offset by gains on the hedged investment, and vice versa. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains. Hedges are sometimes subject to imperfect matching between the hedging transaction and the risk sought to be hedged. There can be no assurance that the Fund's hedging transactions will be effective. Derivatives Risk: Derivative transactions can create investment leverage and may have significant volatility. It is possible that a derivative transaction will result in a much greater loss than the principal amount invested, that changes in the value of a derivative transaction may not correlate perfectly with the underlying asset, and that the Fund may not be able to close out a derivative transaction at a favorable time or price. The counterparty to a derivatives contract may be unable or unwilling to make timely settlement payments, return the Fund's margin, or otherwise honor its obligations. A derivatives transaction may not behave in the manner anticipated by the Adviser or may not have the effect on the Fund anticipated by the Adviser. Emerging Markets Risk: Risks of investing in emerging markets include, among others, greater political and economic instability, greater volatility in currency exchange rates, less developed securities markets, increased potential for market manipulation, possible trade barriers, currency transfer restrictions, a more limited number of potential buyers and issuers, an emerging market country's dependence on revenue from particular commodities or international aid, less governmental supervision and regulation, unavailability of currency hedging techniques, differences in auditing and financial reporting standards, less stringent investor protection and disclosure standards, less developed public health systems, and less developed legal systems. There is also the potential for unfavorable action such as expropriation, nationalization, embargoes, and acts of war. The securities of emerging market companies may trade less frequently and in smaller volumes than more widely held securities. Market disruptions or substantial market corrections may limit very significantly the liquidity of securities of certain companies in a particular country or geographic region, or of all companies in the country or region. The Fund may be unable to liquidate its positions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. These risks are generally greater for investments in frontier market countries, which typically have smaller economies or less developed capital markets than traditional emerging market countries. Exchange-Traded Funds Risk: The Fund is subject to substantially the same risks as those associated with the direct ownership of the securities represented by an underlying ETF in which it invests. In addition, the shares of an underlying ETF may trade at a premium or discount to their intrinsic value (i.e., the market value may differ from the NAV of an ETF's shares) for a number of reasons. For example, supply and demand for shares of an underlying ETF or market disruptions may cause the market price of the underlying ETF to deviate from the value of the underlying ETF's investments, which may be exacerbated in less liquid markets. Focused Investment Risk: To the extent the Fund invests a large percentage of its assets in securities within the same country, state, region, or economic sector its investment strategy could result in more risk or greater volatility in returns than if the Fund's investments were less focused. Inflation-Indexed Securities Risk: The principal amount of an inflation-indexed security typically increases with inflation and decreases with deflation, as measured by a specified index. It is possible that, in a period of declining inflation rates, the Fund could receive at maturity less than the initial principal amount of an inflation-indexed security. Changes in the values of inflation-indexed securities may be difficult to predict, and it is possible that an investment in such securities will have an effect different from that anticipated by the Adviser. Large-Capitalization Securities Risk: Returns on investments in securities of large companies could trail the returns on investments in securities of smaller and mid-sized companies. Larger companies may be unable to respond as quickly as smaller and mid-sized companies to competitive challenges or to changes in business, product, financial, or other market conditions. Larger companies may not be able to maintain growth at the high rates that may be achieved by well-managed smaller and mid-sized companies. Large Transactions Risk: To the extent a large proportion of the shares of the Fund are held by a small number of shareholders (or a single shareholder), including funds or accounts over which the Adviser has investment discretion, the Fund is subject to the risk that these shareholders will purchase or redeem Fund Shares in large amounts rapidly or unexpectedly, including as a result of an asset allocation decision made by the Adviser. In addition, a large number of shareholders collectively may purchase or redeem Fund Shares in large amounts rapidly or unexpectedly (collectively, such transactions are referred to as “large shareholder transactions”). Large shareholder transactions could adversely affect the ability of the Fund to conduct its investment program. Liquidity Risk: Lack of a ready market, stressed market conditions, or restrictions on resale may limit the ability of the Fund to sell a security at an advantageous time or price or at all. Illiquid investments may trade at a discount from comparable, more liquid investments and may be subject to wide fluctuations in market value. Illiquidity of the Fund's holdings may also limit the ability of the Fund to obtain cash to meet redemptions on a timely basis. In addition, the Fund, due to limitations on investments in any illiquid investments and/or the difficulty in purchasing and selling such investments, may be unable to achieve its desired level of exposure to a certain market or sector. Management Risk: The Fund is actively managed. The Adviser's judgments about the attractiveness, relative value, or potential appreciation of a particular sector, security, commodity or investment strategy or as to a hedging strategy may prove to be incorrect, and may cause the Fund to incur losses. There can be no assurance that the Adviser's investment techniques and decisions will produce the desired results. Modeling Risk: The Adviser uses quantitative models in an effort to enhance returns and manage risk. Any imperfections, errors or limitations in these models could limit any benefit to the Fund from the use of the models, or could result in incorrect outputs or in investment outcomes different from or opposite to those expected or desired by the Adviser. There can be no assurance that the models will behave as expected in all market conditions. In addition, computer programming used to create quantitative models, or the data on which such models operate, might contain one or more errors. Mortgage-Related and Other Asset-Backed Securities Risk: Investments in mortgage-related and other asset-backed securities are subject to the risk of significant credit downgrades, illiquidity, and defaults to a greater extent than many other types of fixed-income investments. The liquidity of mortgage-related and asset-backed securities may change over time. During periods of falling interest rates, mortgage- and asset-backed securities may be called or prepaid, which may result in the Fund having to reinvest proceeds in other investments at a lower interest rate. During periods of rising interest rates, the average life of mortgage- and asset-backed securities may extend, which may lock in a below-market interest rate, increase the security's duration and interest rate sensitivity, and reduce the value of the security. Enforcing rights against the underlying assets or collateral may be difficult, and the underlying assets or collateral may be insufficient if the issuer defaults. Non-U.S. Securities Risk: Non-U.S. securities (including depositary receipts) are subject to political, regulatory, and economic risks not present in domestic investments. There may be less information publicly available about a non-U.S. entity than about a U.S. entity, and many non-U.S. entities are not subject to accounting, auditing, legal and financial report standards comparable to those in the United States. Further, such entities and/or their securities may be subject to risks associated with currency controls; expropriation; changes in tax policy; greater market volatility; differing securities market structures; higher transaction costs; and various administrative difficulties, such as delays in clearing and settling portfolio transactions or in receiving payment of dividends. Securities traded on foreign markets may be less liquid (harder to sell) than securities traded domestically. Foreign governments may impose restrictions on the repatriation of capital to the U.S. In addition, to the extent that the Fund buys securities denominated in a foreign currency, there are special risks such as changes in currency exchange rates and the risk that a foreign government could regulate foreign exchange transactions. In addition, to the extent investments are made in a limited number of countries, events in those countries will have a more significant impact on the Fund. Investments in depositary receipts may be less liquid and more volatile than the underlying shares in their primary trading market. Portfolio Turnover Risk: Frequent purchases and sales of portfolio securities may result in higher Fund expenses. REIT Risk: REITs are subject to the risks associated with investing in the securities of real property companies. In particular, REITs may be affected by changes in the values of the underlying properties that they own or operate. Further, REITs are dependent upon specialized management skills, and their investments may be concentrated in relatively few properties, or in a small geographic area or a single property type. REITs are also subject to heavy cash flow dependency and, as a result, are particularly reliant on the proper functioning of capital markets. A variety of economic and other factors may adversely affect a lessee's ability to meet its obligations to a REIT. In the event of a default by a lessee, the REIT may experience delays in enforcing its rights as a lessor and may incur substantial costs associated in protecting its investments. In addition, a REIT could fail to qualify for favorable regulatory treatment. Risk of Investment in Other Pools: When the Fund invests in another pooled investment vehicle (e.g., a mutual fund or exchange-traded fund), it is exposed to the risk that the other pool will not perform as expected and is exposed indirectly to all of the risks applicable to an investment in such other pool. The investment policies of the other pool may not be the same as those of the Fund; as a result, an investment in the other pool may be subject to additional or different risks than those to which the Fund is typically subject. The Fund bears its proportionate share of the fees and expenses of any pool in which it invests. The Adviser or an affiliate may serve as investment adviser to a pool in which the Fund may invest, leading to potential conflicts of interest. It is possible that other clients of the Adviser or its affiliates will purchase or sell interests in a pool sponsored or managed by the Adviser or its affiliates at prices and at times more favorable than those at which the Fund does so. Small-, Mid-, and Micro-Capitalization Securities Risk: The securities of small-, mid- and micro-capitalization companies may be more volatile and may involve more risk than the securities of larger companies. These companies may have limited product lines, markets or financial resources, may lack the competitive strength of larger companies, and may depend on a few key employees. In addition, these companies may have been recently organized and may have little or no track record of success. The securities of smaller companies may trade less frequently and in smaller volumes than more widely held securities. Some securities of smaller issuers may be illiquid or may be restricted as to resale, and their values may have significant volatility. The Fund may be unable to liquidate its positions in such securities at any time, or at a favorable price, in order to meet the Fund's obligations. Returns on investments in securities of small-, mid- and micro-capitalization companies could trail the returns on investments in securities of larger companies. Sovereign Debt Obligations Risk: Investments in debt securities issued by governments or by government agencies and instrumentalities involve the risk that the governmental entities responsible for repayment may be unable or unwilling to pay interest and repay principal when due. Any restructuring of a sovereign debt obligation held by the Fund will likely have a significant adverse effect on the value of the obligation. In the event of default of sovereign debt, the Fund may be unable to pursue legal action against the sovereign issuer or to realize on collateral securing the debt. U.S. Government Securities Risk: Certain U.S. government securities are supported by the full faith and credit of the United States; others are supported by the right of the issuer to borrow from the U.S. Treasury; others are supported by the discretionary authority of the U.S. government to purchase the agency's obligations; and still others are supported only by the credit of the issuing agency, instrumentality, or enterprise. Although U.S. government-sponsored enterprises such as the Federal Home Loan Mortgage Corporation (“Freddie Mac”) and the Federal National Mortgage Association (“Fannie Mae”) may be chartered or sponsored by Congress, they are not funded by Congressional appropriations, and their securities are not issued by the U.S. Treasury, are not supported by the full faith and credit of the U.S. government, and involve increased credit risks. Valuation Risk: Certain portfolio holdings may be valued on the basis of factors other than market quotations. This may occur more often in times of market turmoil or reduced liquidity. There are multiple methods that can be used to value a portfolio holding when market quotations are not readily available. The value established for any portfolio holding at a point in time might differ from what would be produced using a different methodology or if it had been priced using market quotations. Portfolio holdings that are valued using techniques other than market quotations, including “fair valued” securities, may be subject to greater fluctuation in their valuations from one day to the next than if market quotations were used. In addition, there is no assurance that the Fund could sell or close out a portfolio position for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio position is sold or closed out at a discount to the valuation established by the Fund at that time. Investors who purchase or redeem Fund Shares on days when the Fund is holding fair-valued investments may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the Fund had not fair-valued the holding(s) or had used a different valuation methodology. Performance The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of three broad measures of market performance. The bar chart shows the performance of the Fund's Class 3 Shares. On August 1, 2018, the Fund changed to its current principal investment strategies. If the Fund's current principal investment strategies had been in place for these prior periods, performance information shown may have been different. The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. The Fund's past performance does not necessarily indicate how the Fund will perform in the future.Current performance information for the Fund is available toll free by calling (800)-242-0134 or by visiting our website at www.statestreet.com/im. The bar chart and table below provide some indication of the risks of investing in the Fund by illustrating the variability of the Fund's returns from year-to-year and by showing how the Fund's average annual returns for the periods indicated compared with that of three broad measures of market performance. The bar chart shows the performance of the Fund's Class 3 Shares. On August 1, 2018, the Fund changed to its current principal investment strategies. If the Fund's current principal investment strategies had been in place for these prior periods, performance information shown may have been different. The bar chart and average annual total returns table do not reflect the fees or charges imposed by the Accounts of the life insurance companies through which shares of the Fund may be purchased. If these fees and charges were included, returns would be lower than those shown. The Fund's past performance does not necessarily indicate how the Fund will perform in the future. (800)-242-0134 www.statestreet.com/im Annual Total Returns (years ended 12/31) ReturnsQuarter/YearHighest Quarterly Return11.63%Q2 2020Lowest Quarterly Return-17.02%Q1 2020 Highest Quarterly Return 0.1163 2020-06-30 Lowest Quarterly Return -0.1702 2020-03-31 Average Annual Total Returns (for periods ended 12/31/25) 0.1548 0.0685 0.0691 0.1788 0.1442 0.1482 0.3239 0.0791 0.0842 0.0730 -0.0036 0.0201 “Other Expenses” and “Total Annual Fund Operating Expenses” have been restated to reflect current fees. “Total Annual Fund Operating Expenses” and “Total Annual Fund Operating Expenses After Fee Waivers and/or Expense Reimbursements” have been restated to reflect current fees. Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the “Financial Highlights” section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above. The Fund's investment adviser, SSGA Funds Management, Inc. (the “Adviser” or “SSGA FM”), is contractually obligated until April 30, 2027 to waive its management fee and/or reimburse certain expenses for the Fund, in an amount equal to any acquired fund fees and expenses (“AFFEs”), excluding AFFEs derived from the Fund's holdings in acquired funds for cash management purposes, if any. This fee waiver and/or expense reimbursement arrangement may not be terminated prior to April 30, 2027, except with approval of the State Street Variable Insurance Series Funds, Inc.'s (the “Company”) Board of Directors. Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the “Financial Highlights” section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above. Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the “Financial Highlights” section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above. Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the “Financial Highlights” section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above.