497K - NVIT Emerging Markets

NVIT Fidelity Institutional AM® Emerging Markets Fund

Summary Prospectus April 30, 2026

Class I / Class II / Class D / Class Y

Before you invest, you may want to review the Fund’s Prospectus, which contains information about the Fund and its risks. This Summary Prospectus is intended for use in connection with variable insurance contracts, and is not intended for use by other investors. The Fund’s Prospectus and Statement of Additional Information, each dated April 30, 2026 (as may be supplemented or revised), are incorporated by reference into this Summary Prospectus. For free paper or electronic copies of the Fund’s Prospectus and other information about the Fund, go to nationwide.com/mutualfundsnvit, email a request to web_help@nationwide.com or call 800-848-0920, or ask any variable insurance contract provider who offers shares of the Fund as an underlying investment option in its products.

Objective

The NVIT Fidelity Institutional AM® Emerging Markets Fund seeks long-term capital growth by investing primarily in equity securities of companies located in emerging market countries.

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. Sales charges and other expenses that may be imposed by variable insurance contracts are not included. If these charges were reflected, the expenses listed below would be higher. See the variable insurance contract prospectus, which may impose sales charges and other additional contract-level expenses.

Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

	Class I Shares	Class II Shares	Class D Shares	Class Y Shares
Management Fees	0.95%	0.95%	0.95%	0.95%
Distribution and/or Service (12b-1) Fees	None	0.25%	0.25%	None
Other Expenses	0.27%	0.27%	0.36%	0.12%
Total Annual Fund Operating Expenses	1.22%	1.47%	1.56%	1.07%
Fee Waiver/Expense Reimbursement(1)	(0.10)%	(0.10)%	(0.10)%	(0.10)%
Total Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement	1.12%	1.37%	1.46%	0.97%

(1) Nationwide Variable Insurance Trust (the “Trust”) and Nationwide Fund Advisors (the “Adviser”) have entered into a written contract limiting annual fund operating expenses to 0.97% until at

least April 30, 2027. Under the expense limitation agreement, the level to which operating expenses are limited applies to all share classes, excluding any taxes, interest, compensation payable

to parties not affiliated with the Adviser for the recovery of tax reclaims, brokerage commissions, Rule 12b-1 fees, acquired fund fees and expenses, short-sale dividend expenses, administrative services fees, other expenses which are capitalized in accordance with generally accepted accounting principles and expenses incurred by the Fund in connection with any merger or reorganization, and may exclude other nonroutine expenses not incurred in the ordinary course of the Fund’s business. The expense limitation agreement may be changed or eliminated only with the consent of the Board of Trustees of the Trust. The Adviser may request and receive reimbursement from the Fund for advisory fees waived or other expenses reimbursed by the Adviser pursuant to the expense limitation agreement at a date not to exceed three years from the date on which the corresponding waiver or reimbursement to the Fund was made. However, no reimbursement may be made unless: (i) the Fund’s assets exceed $100 million and (ii) the total annual expense ratio is no higher than the amount of the expense limitation that was in place at the time the Adviser waived the fees or reimbursed the expenses and does not cause the expense ratio to exceed the current expense limitation. Reimbursement by the Fund of amounts previously waived or reimbursed by the Adviser is not permitted except as provided for in the expense limitation agreement.

Example

This Example is intended to help you to compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example, however, does not include charges that are imposed by variable insurance contracts. If these charges were reflected, the expenses listed below would be higher.

This Example assumes that you invest $10,000 in the Fund for the time periods indicated and then sell all of your shares at the end of those time periods. It assumes a 5% return each year and no change in expenses, and any expense limitation or fee waivers

NSP-EM (4/26)

Summary Prospectus April 30, 2026

NVIT Fidelity Institutional AM® Emerging Markets Fund

that may apply for the periods indicated above under “Fees and Expenses.” Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	1 Year	3 Years	5 Years	10 Years
Class I Shares	$114	$377	$661	$1,468
Class II Shares	139	455	793	1,749
Class D Shares	149	483	840	1,848
Class Y Shares	99	330	580	1,297

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 99.34% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Fund invests at least 80% of its net assets in equity securities of issuers in emerging markets and other investments that are tied economically to emerging markets. For these purposes, derivative instruments that provide investment exposure to emerging market equity securities or exposure to one or more market risk factors associated with such investments are included in the foregoing 80% investment policy. Emerging markets include countries that have an emerging stock market as defined by MSCI, countries or markets with low- to middle-income economies as classified by the World Bank, and other countries or markets that the subadviser identifies as having similar emerging market characteristics. Emerging markets tend to have relatively low gross national product per capita compared to the world’s major economies and may have the potential for rapid economic growth. The Fund typically maintains investments in at least six countries at all times. The Fund may invest in companies of any size, including smaller companies. Many securities in which the Fund invests are denominated in currencies other than the U.S. dollar.

In buying and selling securities for the Fund, the subadviser relies on fundamental analysis, which involves a bottom-up assessment of a company’s potential for success in light of factors including its financial condition, earnings outlook, strategy, management, industry position, and economic and market conditions.

Although the Fund maintains a diversified portfolio, it nonetheless may invest in a limited number of issuers.

Principal Risks

The Fund cannot guarantee that it will achieve its investment objective.

As with any fund, the value of the Fund’s investments—and therefore, the value of Fund shares—may fluctuate. These changes may occur because of:

Equity securities risk – stock markets are volatile. The price of an equity security fluctuates based on changes in a company’s financial condition and overall market and economic conditions.

Market risk – the risk that one or more markets in which the Fund invests will go down in value, including the possibility that the markets will go down sharply and unpredictably. This occurs due to numerous factors, including interest rates, the outlook for corporate profits, the health of the national and world economies, and the fluctuation of other securities markets around the world. These risks may be magnified if certain social, political, economic and other conditions and events (such as natural disasters, epidemics and pandemics, terrorism, conflicts, trade disputes and social unrest or rapid technological developments such as artificial intelligence) adversely interrupt the global economy.

Selection risk – the risk that the securities selected by the Fund’s subadvisers will underperform the markets, the relevant indexes or the securities selected by other funds with similar investment objectives and investment strategies.

Foreign securities risk – foreign securities often are more volatile, harder to price and less liquid than U.S. securities. The prices of foreign securities may be further affected by other factors, such as changes in the exchange rates between the U.S. dollar and the currencies in which the securities are traded.

Summary Prospectus April 30, 2026

NVIT Fidelity Institutional AM® Emerging Markets Fund

Foreign currencies – foreign securities may be denominated or quoted in currencies other than the U.S. dollar. Changes in foreign currency exchange rates affect the value of the Fund’s portfolio. Generally, when the U.S. dollar rises in value against a foreign currency, a security denominated in that currency loses value because the currency is worth fewer U.S. dollars. Conversely, when the U.S. dollar decreases in value against a foreign currency, a security denominated in that currency gains value because the currency is worth more U.S. dollars.

Emerging markets risk – emerging markets are riskier than more developed markets because they tend to develop unevenly and may never fully develop. Investments in emerging markets are considered speculative. Emerging markets are more likely to experience hyperinflation and currency devaluations, which adversely affect returns to U.S. investors. In addition, many emerging securities markets have far lower trading volumes and less liquidity than developed markets. Since these markets are smaller than developed markets, they may be more likely to suffer sharp and frequent price changes or long-term price depression because of adverse publicity, investor perceptions or the actions of a few large investors. Practices in relation to settlement of securities transactions in emerging markets involve higher risks than those in developed markets, in part because the Fund will need to use brokers and counterparties that are less well capitalized, and custody and registration of assets in some countries are unreliable compared to developed markets. Companies in emerging market countries generally are subject to less stringent financial reporting, accounting and auditing standards than companies in more developed countries. In addition, information about such companies may be less available and reliable. Many emerging markets also have histories of political instability and abrupt changes in policies, and the ability to bring and enforce actions may be limited. Certain emerging markets also face other significant internal or external risks, including the risk of war, nationalization of assets, unexpected market closures and ethnic, religious and racial conflicts.

China exposure – there are special risks associated with investments in China (including Chinese companies listed on U.S. and Hong Kong exchanges), Hong Kong and Taiwan, including exposure to expropriation, confiscatory taxation, nationalization, exchange control regulations (including currency blockage), and uncertainty regarding the ongoing trade dispute and imposition of tariffs between China and the United States. Inflation and rapid fluctuations in inflation and interest rates have had, and may continue to have, negative effects on the economy and securities markets of China, Hong Kong and Taiwan. In addition, investments in Taiwan and Hong Kong could be adversely affected by their respective political and economic relationship with China. Any difficulties encountered by the U.S. Public Company Accounting Oversight Board (“PCAOB”) in inspecting audit work papers and practices of PCAOB registered accounting firms in China with respect to their audit work of U.S. reporting companies

also imposes significant additional risks associated with investments in China. There may be significant obstacles to obtaining information necessary for investigations into or litigation against companies located in or operating in China and shareholders may have limited legal remedies. China, Hong Kong and Taiwan are deemed by the investment manager to be emerging markets countries, and thus are subject to the risks associated with and described under “emerging markets risk.”

Chinese variable interest entities – there are special risks associated with investments in Chinese variable interest entities (“VIEs”). In a typical VIE structure, a shell company is set up in an offshore jurisdiction, such as the Cayman Islands. The shell company, through a wholly foreign-owned enterprise based in China, enters into service and other contracts with another Chinese company known as the VIE. The VIE must be owned by Chinese nationals (and/or other Chinese companies). While VIEs are a longstanding industry practice that is well known to Chinese officials and regulators historically, they have not been formally recognized under Chinese law. The Chinese government’s acceptance of the VIE structure is evolving and the China Securities Regulatory Commission (“CSRC”) has released rules that permit the use of VIE structures, provided they abide by Chinese laws and register with the CSRC. The rules, however, may cause Chinese companies to undergo greater scrutiny and may make the process to create VIEs more difficult and costly. Guidance prohibiting these structures by the Chinese government, generally or with respect to specific industries, would likely cause impacted VIE-structured holding(s) to suffer significant, detrimental, and possibly permanent losses, and in turn, adversely affect the Fund’s returns and net asset value. Further, if a Chinese court or arbitration body chose not to enforce the contracts, the value of the shell company would significantly decline, since it derives its value from the ability to consolidate the VIE into its financials pursuant to such contracts, and in turn, adversely affect the Fund’s returns and net asset value.

Country or sector risk– if the Fund emphasizes one or more countries or economic sectors, it will be more susceptible to the financial, market or economic events affecting the particular issuers in which it invests than funds that do not emphasize particular countries or sectors.

Liquidity risk – when there is little or no active trading market for specific types of securities or instruments, it can become more difficult to sell the securities or instruments at or near their perceived value. An inability to sell a portfolio position can adversely affect the Fund's value or prevent the Fund from being able to take advantage of other investment opportunities. Liquidity risk also includes the risk that the Fund will experience significant net redemptions of its shares at a time when it cannot find willing buyers for its portfolio securities or instruments or can sell its portfolio securities or instruments only at a material loss. To meet redemption

Summary Prospectus April 30, 2026

NVIT Fidelity Institutional AM® Emerging Markets Fund

requests, the Fund may be forced to sell other securities or instruments that are more liquid, but at unfavorable times and conditions. Investments in foreign securities tend to have more exposure to liquidity risk than domestic securities.

Smaller company risk – smaller companies are usually less stable in price and less liquid than larger, more established companies. Smaller companies are more vulnerable than larger companies to adverse business and economic developments and may have more limited resources. Therefore, they generally involve greater risk.

Redemptions risk – the Fund is an investment option for other mutual funds that are managed as “funds-of-funds.” As a result, from time to time, the Fund may experience relatively large redemptions or investments. Large or continuous redemptions may increase the Fund’s transaction costs and could cause the Fund’s operating expenses to be allocated over a smaller asset base, leading to an increase in the Fund’s expense ratio. If funds-of-funds or other large shareholders redeem large amounts of shares rapidly or unexpectedly, the Fund may have to sell portfolio securities at times when it would not otherwise do so, which could negatively impact the Fund’s net asset value and liquidity.

Limited portfolio holdings risk – because the Fund may hold large positions in a smaller number of securities, an increase or decrease in the value of such securities will have a greater impact on the Fund’s value and total return. Funds that invest in a relatively small number of securities may be subject to greater volatility than a more diversified investment.

Loss of money is a risk of investing in the Fund. An investment in the Fund is not a deposit of a bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency.

Performance

The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows the volatility or variability of the Fund’s annual total returns over time and shows that Fund performance can change from year to year. The table shows the Fund’s average annual total returns for certain time periods compared to the returns of a broad-based securities market. Remember, however, that past performance is not necessarily an indication of how the Fund will perform in the future. The returns shown in the bar chart and table do not include charges that will be imposed by variable insurance contracts. If these amounts were reflected, returns would be less than those shown.

The Fund's performance prior to March 3, 2025 reflects returns pursuant to different subadvisers than the Fund's current subadviser. If the Fund's current strategies and subadviser had been in place for the periods shown, the performance information would have been different.

Annual Total Returns– Class I Shares
(Years Ended December 31,)

Highest Quarter:	21.15%	–	4Q 2020
Lowest Quarter:	-26.39%	–	1Q 2020

The inception date for Class D shares is July 29, 2016. Pre-inception historical performance for Class D shares is based on the previous performance of Class II shares. Performance for Class D shares has been adjusted to reflect that share class’s higher expenses than those of Class II shares.

Average Annual Total Returns
(For the Periods Ended December 31, 2025)

	1 Year	5 Years	10 Years
Class I Shares	36.15%	1.01%	6.31%
Class II Shares	35.78%	0.75%	6.04%
Class D Shares	35.77%	0.70%	5.97%
Class Y Shares	36.37%	1.17%	6.47%
MSCI Emerging Markets® Index (reflects no deduction for fees or expenses)	33.57%	4.20%	8.42%

Portfolio Management

Investment Adviser

Nationwide Fund Advisors

Subadviser

FIAM LLC (“FIAM”)

Portfolio Managers

Portfolio Manager	Title	Length of Service with Fund
Sam Polyak, CFA	Portfolio Manager	Since 2025

Tax Information

The dividends and distributions paid by the Fund to the insurance company separate accounts will consist of ordinary income, capital gains, or some combination of both. Because shares of the Fund must be purchased through separate

Summary Prospectus April 30, 2026

NVIT Fidelity Institutional AM® Emerging Markets Fund

accounts used to fund variable insurance contracts, such dividends and distributions will be exempt from current taxation by contract holders if left to accumulate within a separate account. Consult the variable insurance contract prospectus for additional tax information.

Payments to Broker-Dealers and Other Financial Intermediaries

This Fund is only offered as an underlying investment option for variable insurance contracts. The Fund and its related companies may make payments to the sponsoring insurance companies (or their affiliates) for distribution and/or other services, and to broker-dealers and other financial intermediaries that distribute the variable insurance contracts. These payments may create a conflict of interest by influencing the insurance companies to include the Fund as an underlying investment option in the variable insurance contracts, and by influencing the broker-dealers and other financial intermediaries to distribute variable insurance contracts that include the Fund as an underlying investment option over other variable insurance contracts or to otherwise recommend the selection of the Fund as an underlying investment option by contract owners instead of other funds that also may be available investment options. The prospectus (or other offering document) for your variable insurance contract may contain additional information about these payments.

Summary Prospectus April 30, 2026

NVIT Fidelity Institutional AM® Emerging Markets Fund