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        <name>Lam Research Corp</name>
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        <name>NEW TAIWAN DOLLAR</name>
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      <invstOrSec>
        <name>Pegasystems Inc</name>
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      <invstOrSec>
        <name>Tyler Technologies Inc</name>
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        <name>Microsoft Corp</name>
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        <name>Applied Materials Inc</name>
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        <name>NVIDIA Corp</name>
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        <name>ServiceTitan Inc</name>
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        <name>MongoDB Inc</name>
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        <name>Corning Inc</name>
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        <fairValLevel>1</fairValLevel>
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        <name>Cadence Design Systems Inc</name>
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        <name>Broadcom Inc</name>
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        <name>Intel Corp</name>
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        <name>Arista Networks Inc</name>
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        <name>MFS Institutional Money Market Portfolio</name>
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        <name>Analog Devices Inc</name>
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        <name>Snowflake Inc</name>
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        <name>Meta Platforms Inc</name>
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        <name>Oracle Corp</name>
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        <name>Figma Inc</name>
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        <name>Autodesk Inc</name>
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        <name>Crowdstrike Holdings Inc</name>
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        <name>Aon PLC</name>
        <lei>635400FALWQYX5E6QC64</lei>
        <title>Aon PLC</title>
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        <invCountry>IE</invCountry>

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        <name>Datadog Inc</name>
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        <title>Datadog Inc</title>
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      <invstOrSec>
        <name>Shopify Inc</name>
        <lei>549300HGQ43STJLLP808</lei>
        <title>Shopify Inc</title>
        <cusip>82509L107</cusip>
        <identifiers>
          <isin value="CA82509L1076"/>
        </identifiers>
        <balance>669291.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>80803502.43000000</valUSD>
        <pctVal>4.014703840730</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>CA</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>KLA Corp</name>
        <lei>549300H0BF5JCG96TJ81</lei>
        <title>KLA Corp</title>
        <cusip>482480100</cusip>
        <identifiers>
          <isin value="US4824801009"/>
        </identifiers>
        <balance>25127.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>38307367.85000000</valUSD>
        <pctVal>1.903292954026</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Verisk Analytics Inc</name>
        <lei>549300I1YSWNIRKBWP67</lei>
        <title>Verisk Analytics Inc</title>
        <cusip>92345Y106</cusip>
        <identifiers>
          <isin value="US92345Y1064"/>
        </identifiers>
        <balance>67761.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>14065150.77000000</valUSD>
        <pctVal>0.698823851920</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Apple Inc</name>
        <lei>HWUPKR0MPOU8FGXBT394</lei>
        <title>Apple Inc</title>
        <cusip>037833100</cusip>
        <identifiers>
          <isin value="US0378331005"/>
        </identifiers>
        <balance>709421.00000000</balance>
        <units>NS</units>
        <curCd>USD</curCd>
        <valUSD>187414839.78000000</valUSD>
        <pctVal>9.311664153748</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>US</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Taiwan Semiconductor Manufacturing Co Ltd</name>
        <lei>549300KB6NK5SBD14S87</lei>
        <title>Taiwan Semiconductor Manufacturing Co Ltd</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="TW0002330008"/>
        </identifiers>
        <balance>634000.00000000</balance>
        <units>NS</units>
        <currencyConditional curCd="TWD" exchangeRt="31.21100000"/>
        <valUSD>39837991.17000000</valUSD>
        <pctVal>1.979341629352</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>TW</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>2</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
      <invstOrSec>
        <name>Globalwafers Co Ltd</name>
        <lei>529900V6RTNF3U5EGX67</lei>
        <title>Globalwafers Co Ltd</title>
        <cusip>000000000</cusip>
        <identifiers>
          <isin value="TW0006488000"/>
        </identifiers>
        <balance>1175000.00000000</balance>
        <units>NS</units>
        <currencyConditional curCd="TWD" exchangeRt="31.21100000"/>
        <valUSD>17129377.46000000</valUSD>
        <pctVal>0.851069265686</pctVal>
        <payoffProfile>Long</payoffProfile>
        <assetCat>EC</assetCat>
        <issuerCat>CORP</issuerCat>
        <invCountry>TW</invCountry>
        <isRestrictedSec>N</isRestrictedSec>

        <fairValLevel>1</fairValLevel>
        <securityLending>
          <isCashCollateral>N</isCashCollateral>
          <isNonCashCollateral>N</isNonCashCollateral>
          <isLoanByFund>N</isLoanByFund>
        </securityLending>
      </invstOrSec>
    </invstOrSecs>
    <explntrNotes>
      <explntrNote note="Monthly returns presented in Item B.5(a) have been calculated without deducting any applicable sales loads or redemption fees." noteItem="B.5.a"/>
    </explntrNotes>
    <signature>
      <ncom:dateSigned>2026-03-13</ncom:dateSigned>
      <ncom:nameOfApplicant>MFS SERIES TRUST I</ncom:nameOfApplicant>
      <ncom:signature>James Byrne</ncom:signature>
      <ncom:signerName>James Byrne</ncom:signerName>
      <ncom:title>Assistant Treasurer</ncom:title>
    </signature>
  </formData>
</edgarSubmission>