Form 497K Voya PARTNERS INC

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January 27, 2023 12:18 PM EST

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Summary Prospectus May 1, 2022, as supplemented January 27, 2023

Voya Index Solution 2025 Portfolio

Class/Ticker: Z/VSCBX

Before you invest, you may want to review the portfolio's Prospectus, which contains more information about the portfolio and its risks. For free paper or electronic copies of the Prospectus and other portfolio information (including the Statement of Additional Information and most recent financial report to shareholders), go to www.individuals.voya.com/literature; email a request to [email protected]; call 1-800-262-3862; or ask your salesperson, financial intermediary, or retirement plan administrator. The portfolio's Prospectus and Statement of Additional Information, each dated May 1, 2022, as supplemented, and the audited financial statements on pages 18-55 of the portfolio’s shareholder report dated December 31, 2021 are incorporated into this Summary Prospectus by reference and may be obtained free of charge at the website, phone number, or e-mail address noted above.

Investment Objective

Until the day prior to its Target Date (defined below), the Portfolio seeks to provide total return consistent with an asset allocation targeted at retirement in approximately 2025. On the Target Date, the Portfolio's investment objective will be to seek to provide a combination of total return and stability of principal consistent with an asset allocation targeted to retirement.

Fees and Expenses of the Portfolio

The table describes the fees and expenses that you may pay if you buy, hold, and sell shares of the Portfolio. You may pay other fees and expenses such as fees and expenses imposed under your variable annuity contracts or variable life insurance policies (“Variable Contract”) or a qualified pension or retirement plan (“Qualified Plan”), which are not reflected in the tables and examples below. If these fees or expenses were included in the table, the Portfolio’s expenses would be higher. For more information on these charges, please refer to the documents governing your Variable Contract or consult your plan administrator.

Annual Portfolio Operating Expenses
Expenses you pay each year as a % of the value of your investment

Class		Z
Management Fees1		0.21%
Distribution and/or Shareholder Services (12b-1) Fees		None
Other Expenses		0.04%
Acquired Fund Fees and Expenses		0.15%
Total Annual Portfolio Operating Expenses2		0.40%
Waivers and Reimbursements3		(0.25)%
Total Annual Portfolio Operating Expenses after Waivers and Reimbursements		0.15%

The Portfolio’s Management Fee structure is a “bifurcated fee” structure as follows: an annual rate of 0.20% of the Portfolio’s average daily net assets invested in Underlying Funds within the Voya family of funds, and 0.40% of the Portfolio’s average daily net assets invested in direct investments.

Total Annual Portfolio Operating Expenses may be higher than the Portfolio's ratio of expenses to average net assets shown in the Portfolio’s Financial Highlights, which reflects the operating expenses of the Portfolio and does not include Acquired Fund Fees and Expenses.

The adviser is contractually obligated to limit expenses to 0.00% for Class Z shares through May 1, 2024. The limitation does not extend to investment-related costs, extraordinary expenses, and Acquired Fund Fees and Expenses. Termination or modification of this obligation requires approval by the Portfolio’s board.

Expense Example

The Example is intended to help you compare the cost of investing in shares of the Portfolio with the costs of investing in other mutual funds. The Example does not reflect expenses and charges which are, or may be, imposed under your Variable Contract or Qualified Plan. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated. The Example also assumes that your investment had a 5% return each year and that the Portfolio's operating expenses remain the same. The Example reflects applicable expense limitation agreements and/or waivers in effect, if any, for the one-year period and the first year of the three-, five-, and ten-year periods. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

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Class			1 Yr	3 Yrs	5 Yrs	10 Yrs
Z		$	15	103	199	481

Portfolio Turnover

The Portfolio 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 Portfolio Operating Expenses or in the Expense Example, affect the Portfolio's performance.

During the most recent fiscal year, the Portfolio's portfolio turnover rate was 40% of the average value of its portfolio.

Principal Investment Strategies

Under normal market conditions, the Portfolio invests at least 80% of its net assets (plus borrowings for investment purposes) in a combination of Underlying Funds which are passively managed index funds. The Portfolio will provide shareholders with at least 60 days' prior written notice of any change in this investment policy. The Underlying Funds may or may not be advised or subadvised by the Investment Adviser or an affiliate of the Investment Adviser. The Underlying Funds invest in U.S. stocks, international stocks, U.S. bonds, and other fixed-income instruments and the Portfolio uses an asset allocation strategy designed for investors expecting to retire around the year 2025. The Portfolio's current approximate target investment allocation (expressed as a percentage of its net assets) (the “Target Allocation”) among the Underlying Funds is as follows: 45% in equity securities and 55% in fixed-income instruments. Although this is the Target Allocation, the actual allocation of the Portfolio's assets may deviate from the percentages shown. In establishing the Portfolio’s exposure to fixed-income instruments, the Investment Adviser will set target allocations to funding agreements with affiliated or unaffiliated (if available) insurance companies (collectively, “Funding Agreements”), which will not exceed 10% in the case of contracts of any single issuer or 20% for all issuers combined. Because those are target allocations, the Portfolio’s actual allocations might exceed those percentages at times due to a variety of factors, such as changes in the relative values of the Portfolio’s investments and cash flows into and out of the Portfolio, and at those times the Portfolio will typically continue to invest new cash in accordance with those target allocations.

At least 80% of the Portfolio’s assets will normally be invested in Underlying Funds, including exchange-traded funds (“ETFs”), advised or subadvised by the Investment Adviser or an affiliate of the Investment Adviser; this amount may include investments in one or more Funding Agreements issued by Voya Retirement Insurance and Annuity Company (“VRIAC”). The sub-adviser (the “Sub-Adviser”) may in its discretion invest up to 20% of the Portfolio’s assets in Underlying Funds, including ETFs, that are not advised or subadvised by the Investment Adviser or an affiliate of the Investment Adviser and, potentially, in Funding Agreements issued by insurance companies unaffiliated with the Investment Adviser, should they be available for investment by the Portfolio.

The Target Allocation is measured with reference to the principal investment strategies of the Underlying Funds; actual exposure to fixed-income instruments and equity securities will vary from the Target Allocation depending on the actual investments held by the Underlying Funds. The Sub-Adviser may periodically cause the Portfolio to deviate from the Target Allocation based on its assessment of current market conditions or other factors. Generally, the deviations fall within the range of +/- 10% relative to the current Target Allocation. The Sub-Adviser may determine, in light of market conditions or other factors, to deviate by a wider margin in order to protect the Portfolio, achieve its investment objective, or to take advantage of particular opportunities.

The Underlying Funds provide exposure to a wide range of traditional asset classes which include stocks, bonds, and cash.

Equity securities in which the Underlying Funds invest include, but are not limited to, the following: domestic and international large-, mid-, and small-capitalization stocks (which may be growth oriented, value oriented, or a blend); and emerging market securities.

Fixed-income instruments in which the Underlying Funds invest include, but are not limited to, the following: domestic and international long-, intermediate-, and short-term bonds; high-yield bonds commonly referred to as “junk-bonds”; floating rate loans; and Funding Agreements.

The Portfolio may also invest in derivatives, including futures and swaps (including interest rate swaps, total return swaps, and credit default swaps), to make tactical allocations, as a substitute for taking a position in the underlying asset, to minimize risk, and to assist in managing cash.

The Portfolio may also allocate to the following non-traditional asset classes (also known as alternative strategies) which include, but are not limited to the following: domestic and international real estate-related securities, including real estate investment trusts (“REITs”); natural resource/commodity securities; and U.S. Treasury Inflation-Protected Securities. There can be no assurance that these allocations will occur.

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Voya Index Solution 2025 Portfolio

The Portfolio is designed primarily for long-term investors in tax-advantaged accounts. The Portfolio is structured and managed around a specific target retirement or financial goal date of 2025 (“Target Date”). The Target Date is the approximate year that an investor in the Portfolio would plan to make withdrawals from the Portfolio for retirement or other financial goals. The chart below shows the glide path and illustrates how the target allocations to equity securities and debt instruments will change over time. Generally, the Portfolio's glide path will transition to the target asset allocation illustrated below on an annual basis and become more conservative as the Portfolio approaches the Target Date. As the Portfolio approaches its Target Date, the Portfolio's Target Allocation is anticipated to be the same as that of Voya Index Solution Income Portfolio, which is equal to approximately 35% equity securities and 65% debt instruments.

As the Portfolio's Target Allocation migrates toward that of Voya Index Solution Income Portfolio by the Target Date, it is anticipated that the Portfolio would be merged with and into the Voya Index Solution Income Portfolio. The Voya Index Solution Income Portfolio is for those investors who are retired, nearing retirement or in need of making withdrawals from their portfolio soon.

In summary, the Portfolio is designed for an investor who plans to withdraw the value of the investor's investments in the Portfolio gradually on or after the Target Date. The mix of investments in the Portfolio's Target Allocation will change over time and seek to reduce investment risk as the Portfolio approaches its Target Date.

The Portfolio will be rebalanced periodically to return to the Target Allocation. The Target Allocation may be changed at any time by the Sub-Adviser.

Principal Risks

You could lose money on an investment in the Portfolio, even near, at, or after the Target Date. There is no guarantee that the Portfolio will provide adequate income at and through your retirement or for any of your financial goals. The value of your investment in the Portfolio changes with the values of the Underlying Funds and their investments. The Portfolio is subject to the following principal risks (either directly or through investments in one or more Underlying Funds). Any of these risks, among others, could affect the Portfolio's or an Underlying Fund's performance or cause the Portfolio or an Underlying Fund to lose money or to underperform market averages of other funds. The principal risks are presented in alphabetical order to facilitate readability, and their order does not imply that the realization of one risk is more likely to occur or have a greater adverse impact than another risk.

Asset Allocation: Investment performance depends on the manager’s skill in allocating assets among the asset classes in which the Portfolio invests and in choosing investments within those asset classes. There is a risk that the manager may allocate assets or investments to or within an asset class that underperforms compared to other asset classes or investments.

Cash/Cash Equivalents: Investments in cash or cash equivalents may lower returns and result in potential lost opportunities to participate in market appreciation which could negatively impact the Portfolio’s performance and ability to achieve its investment objective.

Company: The price of a company’s stock could decline or underperform for many reasons, including, among others, poor management, financial problems, reduced demand for the company’s goods or services, regulatory fines and judgments, or business challenges. If a company is unable to meet its financial obligations, declares bankruptcy, or becomes insolvent, its stock could become worthless.

Credit: The Portfolio could lose money if the issuer or guarantor of a fixed-income instrument in which the Portfolio invests, or the counterparty to a derivative contract the Portfolio entered into, is unable or unwilling, or is perceived (whether by market participants, rating agencies, pricing services, or otherwise) as unable or unwilling, to meet its financial obligations.

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Credit Default Swaps: The Portfolio may enter into credit default swaps, either as a buyer or a seller of the swap. A buyer of a credit default swap is generally obligated to pay the seller an upfront or a periodic stream of payments over the term of the contract until a credit event, such as a default, on a reference obligation has occurred. If a credit event occurs, the seller generally must pay the buyer the “par value” (full notional value) of the swap in exchange for an equal face amount of deliverable obligations of the reference entity described in the swap, or the seller may be required to deliver the related net cash amount if the swap is cash settled. As a seller of a credit default swap, the Portfolio would effectively add leverage to its portfolio because, in addition to its total net assets, the Portfolio would be subject to investment exposure on the full notional value of the swap. Credit default swaps are particularly subject to counterparty, credit, valuation, liquidity, and leveraging risks and the risk that the swap may not correlate with its reference obligation as expected. Certain standardized credit default swaps are subject to mandatory central clearing. Central clearing is expected to reduce counterparty credit risk and increase liquidity; however, there is no assurance that it will achieve that result, and, in the meantime, central clearing and related requirements expose the Portfolio to new kinds of costs and risks. In addition, credit default swaps expose the Portfolio to the risk of improper valuation.

Currency: To the extent that the Portfolio invests directly or indirectly in foreign (non-U.S.) currencies or in securities denominated in, or that trade in, foreign (non-U.S.) currencies, it is subject to the risk that those foreign (non-U.S.) currencies will decline in value relative to the U.S. dollar or, in the case of hedging positions, that the U.S. dollar will decline in value relative to the currency being hedged by the Portfolio through foreign currency exchange transactions.

Deflation: Deflation occurs when prices throughout the economy decline over time—the opposite of inflation. Unless repayment of the original bond principal upon maturity (as adjusted for inflation) is guaranteed, when there is deflation, the principal and income of an inflation-protected bond will decline and could result in losses.

Derivative Instruments: Derivative instruments are subject to a number of risks, including the risk of changes in the market price of the underlying asset, reference rate, or index credit risk with respect to the counterparty, risk of loss due to changes in market interest rates, liquidity risk, valuation risk, and volatility risk. The amounts required to purchase certain derivatives may be small relative to the magnitude of exposure assumed by the Portfolio. Therefore, the purchase of certain derivatives may have an economic leveraging effect on the Portfolio and exaggerate any increase or decrease in the net asset value. Derivatives may not perform as expected, so the Portfolio may not realize the intended benefits. When used for hedging purposes, the change in value of a derivative may not correlate as expected with the asset, reference rate, or index being hedged. When used as an alternative or substitute for direct cash investment, the return provided by the derivative may not provide the same return as direct cash investment.

Floating Rate Loans: In the event a borrower fails to pay scheduled interest or principal payments on a floating rate loan (which can include certain bank loans), the Portfolio will experience a reduction in its income and a decline in the market value of such floating rate loan. If a floating rate loan is held by the Portfolio through another financial institution, or the Portfolio relies upon another financial institution to administer the loan, the receipt of scheduled interest or principal payments may be subject to the credit risk of such financial institution. Investors in floating rate loans may not be afforded the protections of the anti-fraud provisions of the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended, because loans may not be considered “securities” under such laws. Additionally, the value of collateral, if any, securing a floating rate loan can decline or may be insufficient to meet the borrower’s obligations under the loan, and such collateral may be difficult to liquidate. No active trading market may exist for many floating rate loans and many floating rate loans are subject to restrictions on resale. Transactions in loans typically settle on a delayed basis and may take longer than 7 days to settle. As a result, the Portfolio may not receive the proceeds from a sale of a floating rate loan for a significant period of time. Delay in the receipts of settlement proceeds may impair the ability of the Portfolio to meet its redemption obligations, and may limit the ability of the Portfolio to repay debt, pay dividends, or to take advantage of new investment opportunities.

Foreign (Non-U.S.) Investments/Developing and Emerging Markets: Investing in foreign (non-U.S.) securities may result in the Portfolio experiencing more rapid and extreme changes in value than a fund that invests exclusively in securities of U.S. companies due, in part, to: smaller markets; differing reporting, accounting, auditing, and financial reporting standards and practices; nationalization, expropriation, or confiscatory taxation; foreign currency fluctuations, currency blockage, or replacement; potential for default on sovereign debt; and political changes or diplomatic developments, which may include the imposition of economic sanctions or other measures by the U.S. or other governments and supranational organizations. Markets and economies throughout the world are becoming increasingly interconnected, and conditions or events in one market, country, or region may adversely impact investments or issuers in another market, country, or region. Foreign (non-U.S.) investment risks may be greater in developing and emerging markets than in developed markets.

Funding Agreements: A Portfolio may invest in Funding Agreements issued by insurance companies affiliated with the Investment Adviser and Sub-Adviser, such as VRIAC, and insurance companies unaffiliated with the Investment Adviser and Sub-Adviser. A Funding Agreement has a stable principal value and typically pays interest at a relatively short-term rate, which is subject

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to change periodically. Investment in a Funding Agreement is subject to the credit risk of the insurer, and an insurer may be unable to repay the entire amount of principal and interest due under a Funding Agreement. In a rising interest rate environment, the interest rate provided by a Funding Agreement may not increase as quickly as the yields of other short-term investments, adversely affecting the Portfolio’s performance. In the case of a Funding Agreement with VRIAC, there can be no guarantee that the interest rate the Portfolio receives under such a Funding Agreement will be as favorable as the rate that might be paid under a Funding Agreement with another, unaffiliated insurer or other short-term investments.

The Sub-Adviser’s decision to invest in a Funding Agreement issued by VRIAC presents conflicts of interest. VRIAC will typically invest the proceeds of the Funding Agreement at a spread above what it agrees to pay the Portfolio, resulting in a financial benefit to VRIAC, and the Sub-Adviser receives a management fee from VRIAC for managing the proceeds of the Funding Agreement (along with the proceeds of other funding agreements issued by VRIAC). In addition, an investment in a Funding Agreement may have the effect of reducing the Portfolio’s gross expenses, thereby also reducing the Investment Adviser’s obligations under fee waiver and expense limitation arrangements with the Portfolio. Any changes in the interest rate paid by VRIAC on a Funding Agreement is determined by VRIAC, with prior notice to the Portfolio. The Sub-Adviser may have a financial incentive to invest a greater percentage of the Portfolio’s assets in a Funding Agreement with VRIAC than the percentage of the Portfolio’s assets it might invest in obligations of any other single issuer, including following a reduction in the interest rate paid on the Funding Agreement. A Portfolio affiliation with VRIAC might delay or limit the Portfolio’s ability to recover its investment in a Funding Agreement in the event of an insolvency of VRIAC. The Sub-Adviser is subject to a fiduciary duty to the Portfolio in its decisions as to whether, and how much, the Portfolio should invest in a Funding Agreement with VRIAC at any time. In addition, investments by the Portfolio in a Funding Agreement with VRIAC must comply with conditions set forth in applicable exemptive relief provided by the SEC designed to mitigate the foregoing conflicts of interest, and in related policies and procedures adopted by the Portfolio’s Board.

Growth Investing: Prices of growth-oriented stocks are more sensitive to investor perceptions of the issuer’s growth potential and may fall quickly and significantly if investors suspect that actual growth may be less than expected. There is a risk that funds that invest in growth-oriented stocks may underperform other funds that invest more broadly. Growth-oriented stocks tend to be more volatile than value-oriented stocks, and may underperform the market as a whole over any given time period.

High-Yield Securities: Lower-quality securities (including securities that have fallen below investment grade and are classified as “junk bonds” or “high-yield securities”) have greater credit risk and liquidity risk than higher-quality (investment grade) securities, and their issuers' long-term ability to make payments is considered speculative. Prices of lower-quality bonds or other fixed-income instruments are also more volatile, are more sensitive to negative news about the economy or the issuer, and have greater liquidity risk and price volatility.

Index Strategy (Portfolio): An Underlying Fund (or a portion of the Underlying Fund) that seeks to track an index’s performance and does not use defensive strategies or attempt to reduce its exposure to poor performing securities in an index may underperform the overall market (each, an “Underlying Index Fund”). To the extent an Underlying Index Fund’s investments track its target index, such Underlying Index Fund may underperform other funds that invest more broadly. Errors in index data, index computations or the construction of the index in accordance with its methodology may occur from time to time and may not be identified and corrected by the index provider for a period of time or at all, which may have an adverse impact on the Portfolio. The correlation between an Underlying Index Fund’s performance and index performance will be reduced by the Underlying Index Fund’s expenses and could be reduced by the timing of purchases and redemptions of the Underlying Index Fund’s shares. In addition, an Underlying Index Fund’s actual holdings might not match the index and an Underlying Index Fund’s effective exposure to index securities at any given time may not precisely correlate. When deciding between Underlying Index Funds benchmarked to the same index, the manager may not select the Underlying Index Fund with the lowest expenses. In particular, when deciding between Underlying Index Funds benchmarked to the same index, the manager will generally select an affiliated Underlying Index Fund, even when the affiliated Underlying Index Fund has higher expenses than an unaffiliated Underlying Index Fund. When the Portfolio invests in an affiliated Underlying Index Fund with higher expenses, the Portfolio’s performance will be lower than if the Portfolio had invested in an Underlying Index Fund with comparable performance but lower expenses (although any expense limitation arrangements in place at the time might have the effect of limiting or eliminating the amount of that underperformance). The manager may select an unaffiliated Underlying Index Fund, including an ETF, over an affiliated Underlying Index Fund benchmarked to the same index when the manager believes making an investment in the affiliated Underlying Index Fund would be disadvantageous to the affiliated Underlying Index Fund, such as when the Portfolio is investing on a short-term basis.

Inflation-Indexed Bonds: If the index measuring inflation falls, the principal value of inflation-indexed bonds will be adjusted downward, and consequently, the interest payable on these bonds (calculated with respect to a smaller principal amount) will be reduced. In addition, inflation-indexed bonds are subject to the usual risks associated with fixed-income instruments, such

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as interest rate and credit risk. Repayment of the original bond principal upon maturity (as adjusted for inflation) is guaranteed in the case of U.S. Treasury inflation-indexed bonds. For bonds that do not provide a similar guarantee, the adjusted principal value of the bond repaid at maturity may be less than the original principal.

Interest Rate: A rise in market interest rates generally results in a fall in the value of bonds and other fixed-income instruments; conversely, values generally rise as market interest rates fall. The higher the credit quality of the instrument, and the longer its maturity or duration, the more sensitive it is to changes in market interest rates. Duration is a measure of sensitivity of the price of a fixed-income instrument to a change in interest rate. As of the date of this Prospectus, the United States is experiencing a rising market interest rate environment, which may increase the Portfolio’s exposure to risks associated with rising market interest rates. Rising market interest rates have unpredictable effects on the markets and may expose fixed-income and related markets to heightened volatility. To the extent that the Portfolio invests in fixed-income instruments, an increase in market interest rates may lead to increased redemptions and increased portfolio turnover, which could reduce liquidity for certain investments, adversely affect values, and increase costs. Increased redemptions may cause the Portfolio to liquidate portfolio positions when it may not be advantageous to do so and may lower returns. If dealer capacity in fixed-income markets is insufficient for market conditions, it may further inhibit liquidity and increase volatility in the fixed-income markets. Further, recent and potential future changes in government policy may affect interest rates. Negative or very low interest rates could magnify the risks associated with changes in interest rates. In general, changing interest rates, including rates that fall below zero, could have unpredictable effects on markets and may expose fixed-income and related markets to heightened volatility. Changes to monetary policy by the Federal Reserve Board or other regulatory actions could expose fixed-income and related markets to heightened volatility, interest rate sensitivity, and reduced liquidity, which may impact the Portfolio’s operations and return potential.

Investing through Stock Connect: Shares in mainland China-based companies that trade on Chinese stock exchanges such as the Shanghai Stock Exchange and the Shenzhen Stock Exchange (“China A-Shares”) may be purchased directly or indirectly through the Shanghai-Hong Kong Stock Connect (“Stock Connect”), a mutual market access program designed to, among other things, enable foreign investment in the People’s Republic of China (“PRC”) via brokers in Hong Kong. There are significant risks inherent in investing in China A-Shares through Stock Connect. The underdeveloped state of PRC’s investment and banking systems subjects the settlement, clearing, and registration of China A-Shares transactions to heightened risks. Stock Connect can only operate when both PRC and Hong Kong markets are open for trading and when banking services are available in both markets on the corresponding settlement days. As such, if either or both markets are closed on a U.S. trading day, the Portfolio may not be able to dispose of its China A-Shares in a timely manner, which could adversely affect the Portfolio’s performance.

The Chinese economy is generally considered an emerging and volatile market. Significant portions of the Chinese securities markets may become rapidly illiquid because Chinese issuers have the ability to suspend the trading of their equity securities under certain circumstances, and have shown a willingness to exercise that option in response to market volatility, epidemics, pandemics, adverse economic, market or political events, and other events. In addition, there may be restrictions on investments in Chinese companies. For example, on November 12, 2020, the President of the United States of America signed an Executive Order prohibiting U.S. persons from purchasing or investing in publicly-traded securities of companies identified by the U.S. government as “Communist Chinese military companies.” The list of such companies can change from time to time, and as a result of forced selling or inability to participate in an investment the Investment Adviser otherwise believes is attractive, the Portfolio may incur losses.

Liquidity: If a security is illiquid, the Portfolio might be unable to sell the security at a time when the Portfolio’s manager might wish to sell, or at all, which could cause the Portfolio to lose money. Further, the lack of an established secondary market may make it more difficult to value illiquid securities, exposing the Portfolio to the risk that the prices at which it sells illiquid securities will be less than the prices at which they were valued when held by the Portfolio. The prices of illiquid securities may be more volatile than more liquid securities, and the risks associated with illiquid securities may be greater in times of financial stress.

London Inter-Bank Offered Rate: The obligations of the parties under many financial arrangements, such as fixed-income instruments (including senior loans) and derivatives, may be determined based, in whole or in part, on the London Inter-Bank Offered Rate (“LIBOR”). In 2017, the UK Financial Conduct Authority announced its intention to cease compelling banks to provide the quotations needed to sustain LIBOR after 2021. ICE Benchmark Administration, the administrator of LIBOR, ceased publication of most LIBOR settings on a representative basis at the end of 2021 and is expected to cease publication of a majority of U.S. dollar LIBOR settings on a representative basis after June 30, 2023. In addition, global regulators have announced that, with limited exceptions, no new LIBOR-based contracts should be entered into after 2021. Actions by regulators have resulted in the establishment of alternative reference rates to LIBOR in many major currencies, including for example, the Secured Overnight Funding Rate (“SOFR”) for U.S. dollar LIBOR. SOFR is a broad measure of the cost of borrowing cash overnight collateralized by U.S. Treasury securities in the repurchase agreement market. SOFR is published in various forms, including

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as a daily, compounded, and forward-looking term rate. The discontinuance of LIBOR and the adoption/implementation of alternative rates pose a number of risks, including, among others, whether any substitute rate will experience the market participation and liquidity necessary to provide a workable substitute for LIBOR; the effect on parties’ existing contractual arrangements, hedging transactions, and investment strategies generally from a conversion from LIBOR to alternative rates; the effect on the Portfolio’s existing investments, including the possibility that some of those investments may terminate or their terms may be adjusted to the disadvantage of the Portfolio; and the risk of general market disruption during the transition period. Markets relying on alternative rates are developing slowly and may offer limited liquidity. The general unavailability of LIBOR and the transition away from LIBOR to alternative rates could have a substantial adverse impact on the performance of the Portfolio.

Market: The market values of securities will fluctuate, sometimes sharply and unpredictably, based on overall economic conditions, governmental actions or intervention, market disruptions caused by trade disputes or other factors, political developments, and other factors. Prices of equity securities tend to rise and fall more dramatically than those of fixed-income instruments. Additionally, legislative, regulatory, or tax policies or developments may adversely impact the investment techniques available to a manager, add to costs and impair the ability of the Portfolio to achieve its investment objectives.

Market Capitalization: Stocks fall into three broad market capitalization categories: large, mid, and small. Investing primarily in one category carries the risk that, due to current market conditions, that category may be out of favor with investors. If valuations of large-capitalization companies appear to be greatly out of proportion to the valuations of mid- or small-capitalization companies, investors may migrate to the stocks of mid- and small-capitalization companies causing a fund that invests in these companies to increase in value more rapidly than a fund that invests in large-capitalization companies. Investing in mid- and small-capitalization companies may be subject to special risks associated with narrower product lines, more limited financial resources, smaller management groups, more limited publicly available information, and a more limited trading market for their stocks as compared with large-capitalization companies. As a result, stocks of mid- and small-capitalization companies may be more volatile and may decline significantly in market downturns.

Market Disruption and Geopolitical: The Portfolio is subject to the risk that geopolitical events will disrupt securities markets and adversely affect global economies and markets. Due to the increasing interdependence among global economies and markets, conditions in one country, market, or region might adversely impact markets, issuers and/or foreign exchange rates in other countries, including the United States Wars, terrorism, global health crises and pandemics, and other geopolitical events that have led, and may continue to lead, to increased market volatility and may have adverse short- or long-term effects on U.S., and global economies and markets, generally. For example, the COVID-19 pandemic has resulted, and may continue to result, in significant market volatility, exchange suspensions and closures, declines in global financial markets, higher default rates, supply chain disruptions, and a substantial economic downturn in economies throughout the world. Natural and environmental disasters and systemic market dislocations are also highly disruptive to economies and markets. In addition, military action by Russia in Ukraine has, and may continue to, adversely affect global energy and financial markets and therefore could affect the value of the Portfolio’s investments, including beyond the Portfolio’s direct exposure to Russian issuers or nearby geographic regions. The extent and duration of the military action, sanctions, and resulting market disruptions are impossible to predict and could be substantial. Those events as well as other changes in foreign (non-U.S.) and domestic economic, social, and political conditions also could adversely affect individual issuers or related groups of issuers, securities markets, interest rates, credit ratings, inflation, investor sentiment, and other factors affecting the value of the Portfolio’s investments. Any of these occurrences could disrupt the operations of the Portfolio and of the Portfolio’s service providers.

Natural Resources/Commodity Securities: The operations and financial performance of companies in natural resources industries may be directly affected by commodity prices. This risk is exacerbated for those natural resources companies that own the underlying commodity.

Prepayment and Extension: Many types of fixed-income instruments are subject to prepayment and extension risk. Prepayment risk is the risk that the issuer of a fixed-income instrument will pay back the principal earlier than expected. This risk is heightened in a falling market interest rate environment. Prepayment may expose the Portfolio to a lower rate of return upon reinvestment of principal. Also, if a fixed-income instrument subject to prepayment has been purchased at a premium, the value of the premium would be lost in the event of prepayment. Extension risk is the risk that the issuer of a fixed-income instrument will pay back the principal later than expected. This risk is heightened in a rising market interest rate environment. This may negatively affect performance, as the value of the fixed-income instrument decreases when principal payments are made later than expected. Additionally, the Portfolio may be prevented from investing proceeds it would have received at a given time at the higher prevailing interest rates.

Real Estate Companies and Real Estate Investment Trusts: Investing in real estate companies and REITs may subject the Portfolio to risks similar to those associated with the direct ownership of real estate, including losses from casualty or condemnation, changes in local and general economic conditions, supply and demand, market interest rates, zoning laws, regulatory limitations

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on rents, property taxes, environmental problems, overbuilding, high foreclosure rates, and operating expenses in addition to terrorist attacks, wars, or other acts that destroy real property. In addition, REITs may also be affected by tax and regulatory requirements in that a REIT may not qualify for favorable tax treatment or regulatory exemptions. Investments in REITs are affected by the management skill of the REIT’s sponsor. The Portfolio will indirectly bear its proportionate share of expenses, including management fees, paid by each REIT in which it invests.

Underlying Funds: Because the Portfolio invests primarily in Underlying Funds, the investment performance of the Portfolio is directly related to the investment performance of the Underlying Funds in which it invests. When the Portfolio invests in an Underlying Fund, it is exposed indirectly to the risks of a direct investment in the Underlying Fund. If the Portfolio invests a significant portion of its assets in a single Underlying Fund, it may be more susceptible to risks associated with that Underlying Fund and its investments than if it invested in a broader range of Underlying Funds. It is possible that more than one Underlying Fund will hold securities of the same issuers, thereby increasing the Portfolio’s indirect exposure to those issuers. It also is possible that one Underlying Fund may be selling a particular security when another is buying it, producing little or no change in exposure but generating transaction costs and/or resulting in realization of gains with no economic benefit. There can be no assurance that the investment objective of any Underlying Fund will be achieved. In addition, the Portfolio’s shareholders will indirectly bear their proportionate share of the Underlying Funds’ fees and expenses, in addition to the fees and expenses of the Portfolio itself.

Value Investing: Securities that appear to be undervalued may never appreciate to the extent expected. Further, because the prices of value-oriented securities tend to correlate more closely with economic cycles than growth-oriented securities, they generally are more sensitive to changing economic conditions, such as changes in market interest rates, corporate earnings and industrial production. The manager may be wrong in its assessment of a company’s value and the securities the Portfolio holds may not reach their full values. Risks associated with value investing include that a security that is perceived by the manager to be undervalued may actually be appropriately priced and, thus, may not appreciate and provide anticipated capital growth. The market may not favor value-oriented securities and may not favor equities at all. During those periods, the Portfolio’s relative performance may suffer. There is a risk that funds that invest in value-oriented securities may underperform other funds that invest more broadly.

Voya-related Underlying Funds: The Sub-Adviser’s selection of Underlying Funds presents conflicts of interest. The net management fee revenue received or costs incurred by the Sub-Adviser and its affiliates will vary depending on the Underlying Funds it selects for the Portfolio, and the Sub-Adviser will have an incentive to select the Underlying Funds (whether or not affiliated with the Sub-Adviser) that will result in the greatest net management fee revenue or lowest costs to the Sub-Adviser and its affiliates, even if that results in increased expenses and potentially less favorable investment performance for the Portfolio. In many cases, investments in Underlying Funds advised or subadvised by the Investment Adviser or an affiliate (“Voya-related Underlying Funds”) will afford the manager greater net management fee revenue (including Underlying Fund advisory or subadvisory fees) than would investments in other Underlying Funds. In addition, the Sub-Adviser may prefer to invest in a Voya-related Underlying Fund over another Underlying Fund because the investment may be beneficial to the Sub-Adviser in managing the Voya-related Underlying Fund by helping the Voya-related Underlying Fund achieve economies of scale or by enhancing cash flows to the Voya-related Underlying Fund. For similar reasons, the Sub-Adviser may have an incentive to delay or decide against the sale of interests held by the Portfolio in Voya-related Underlying Funds, and the Sub-Adviser may implement changes in the Portfolio’s holdings of Underlying Funds in a manner intended to minimize the disruptive effects and added costs of those changes to Voya-related Underlying Funds. Although the Portfolio may invest a portion of its assets in Underlying Funds not advised or subadvised by the Investment Adviser or an affiliate, there is no assurance that it will do so even in cases where those Underlying Funds incur lower fees or have achieved better historical investment performance than the comparable Voya-related Underlying Funds.

An investment in the Portfolio is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other government agency.

Performance Information

The following information is intended to help you understand the risks of investing in the Portfolio. The following bar chart shows the changes in the Portfolio's performance from year to year, and the table compares the Portfolio's performance to the performance of a broad-based securities market index/indices with investment characteristics similar to those of the Portfolio for the same period. The Portfolio's performance information reflects applicable fee waivers and/or expense limitations in effect during the period presented. Absent such fee waivers/expense limitations, if any, performance would have been lower. The Class Z shares performance shown for the period prior to their inception date is the performance of Class I shares without adjustment for any differences in the expenses between the two classes. If adjusted for such differences, returns would be different.

Class I shares commenced operations on March 10, 2008.

Summary Prospectus

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Performance shown in the bar chart and in the Average Annual Total Returns table does not include insurance-related charges imposed under a Variable Contract or expenses related to a Qualified Plan. If these charges or expenses were included, performance would be lower. Thus, you should not compare the Portfolio's performance directly with the performance information of other investment products without taking into account all insurance-related charges and expenses payable under your Variable Contract or Qualified Plan. The Portfolio's past performance is no guarantee of future results.

Calendar Year Total Returns Class Z
(as of December 31 of each year)

Best quarter:	2nd Quarter 2020	12.65%
Worst quarter:	1st Quarter 2020	-12.22%

Average Annual Total Returns %
(for the periods ended December 31, 2021)

		1 Yr	5 Yrs	10 Yrs	Since Inception	Inception Date
Class Z	%	11.03	10.42	9.39	N/A	05/01/15
S&P Target Date 2025 Index1	%	10.67	9.65	9.01	N/A

The index returns include the reinvestment of dividends and distributions net of withholding taxes, but do not reflect fees, brokerage commissions, or other expenses.

Portfolio Management

Investment Adviser	Sub-Adviser
Voya Investments, LLC	Voya Investment Management Co. LLC

Portfolio Managers
Barbara Reinhard, CFA Portfolio Manager (since 09/19)	Paul Zemsky, CFA Portfolio Manager (since 03/08)

Purchase and Sale of Portfolio Shares

Shares of the Portfolio are not offered directly to the public. Purchase and sale of shares may be made only by separate accounts of insurance companies serving as investment options under Variable Contracts or by Qualified Plans, custodian accounts, and certain investment advisers and their affiliates, other investment companies, or permitted investors. Please refer to the prospectus for the appropriate insurance company separate account, investment company, or your plan documents for information on how to direct investments in, or sale from, an investment option corresponding to the Portfolio and any fees that may apply. Participating insurance companies and certain other designated organizations are authorized to receive purchase orders on the Portfolio's behalf.

Tax Information

Distributions made by the Portfolio to a Variable Contract or Qualified Plan, and exchanges and redemptions of Portfolio shares made by a Variable Contract or Qualified Plan, ordinarily do not cause the corresponding contract holder or plan participant to recognize income or gain for federal income tax purposes. See the contract prospectus or the governing documents of your Qualified Plan for information regarding the federal income tax treatment of the distributions to your Variable Contract or Qualified Plan and the holders of the contracts or plan participants.

Payments to Broker-Dealers and Other Financial Intermediaries

If you invest in the Portfolio through a Variable Contract issued by an insurance company or through a Qualified Plan that, in turn, was purchased or serviced through an insurance company, broker-dealer or other financial intermediary, the Portfolio and its adviser or distributor or their affiliates may: (1) make payments to the insurance company issuer of the Variable Contract or to the company servicing the Qualified Plan; and (2) make payments to the insurance company, broker-dealer or other financial intermediary. These payments may create a conflict of interest by: (1) influencing the insurance company or the

Summary Prospectus

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company servicing the Qualified Plan to make the Portfolio available as an investment option for the Variable Contract or the Qualified Plan; or (2) by influencing the broker-dealer or other intermediary and your salesperson to recommend the Variable Contract or the pension servicing agent and/or the Portfolio over other options. Ask your salesperson or Qualified Plan administrator or visit your financial intermediary's website for more information.

Summary Prospectus

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