497(k) Inflation Protected Bond Fund

Summary Prospectus July 17, 2026

Voya Inflation Protected Bond Plus Fund (formerly, Voya Inflation Protected Bond Plus Portfolio)

Class/Ticker: A/IPBDX; I/IBRIX; R/IBRAX

Before you invest, you may want to review the fund's Prospectus, which contains more information about the fund and its risks. For free paper or electronic copies of the Prospectus and other fund information (including the Statement of Additional Information and most recent financial report to shareholders), go to https://individuals.voya.com/literature; email a request to Voyaim_literature@voya.com; call 1-800-992-0180; or ask your salesperson, financial intermediary, or retirement plan administrator. The fund's Prospectus and Statement of Additional Information, each dated July 17, 2026, and the audited financial statements that are included in the fund’s shareholder report dated March 31, 2026 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

The Fund seeks to maximize real return, consistent with preservation of real capital and prudent investment management.

Fees and Expenses of the Fund

These tables describe the fees and expenses that you may pay if you buy, hold, and sell shares of the Fund. 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. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $100,000 in Voya mutual funds. More information about these and other discounts is available from your financial intermediary and in the discussion in the Sales Charges section of the Prospectus (page 27), in Appendix A to the Prospectus, or the Purchase, Exchange, and Redemption of Shares section of the Statement of Additional Information (page 74).

Shareholder Fees
Fees paid directly from your investment

Class	Maximum sales charge (load) as a % of offering price imposed on purchases	Maximum deferred sales charge (load) as a % of purchase or sales price, whichever is less
A	2.50	None1
I	None	None
R	None	None

Annual Fund Operating Expenses2
Expenses you pay each year as a % of the value of your investment

Class		A3	I	R
Management Fees	%	0.35	0.35	0.35
Distribution and/or Shareholder Services (12b-1) Fees	%	0.25	None	0.50
Other Expenses	%	0.11	0.11	0.11
Total Annual Fund Operating Expenses	%	0.71	0.46	0.96
Waivers and Reimbursements4	%	(0.01)	(0.01)	(0.01)
Total Annual Fund Operating Expenses After Waivers and Reimbursements	%	0.70	0.45	0.95

A contingent deferred sales charge of 1.00% is assessed on certain redemptions of Class A shares made within 12 months after purchase where no initial sales charge was paid at the time of purchase as part of an investment of $500,000 or more.

Expense information has been restated to reflect current contractual rates.

Other Expenses are based on estimated amounts for the current fiscal year.

Voya Investments, LLC (the “Investment Adviser”) is contractually obligated to limit expenses to 0.70%, 0.45%, and 0.95% for Class A, Class I, and Class R shares, respectively, through May 1, 2028 (the “Expense Limitation Agreement”). The limitation does not extend to interest, taxes, other investment-related costs, leverage expenses, extraordinary expenses such as litigation or other expenses not incurred in the ordinary course of business, and expenses of any counsel or other persons or services retained by the Trustees who are not “interested persons” as that term is defined by the Investment Company Act of 1940, as amended. Modification of the Expense Limitation Agreement requires written agreement signed by each of the parties and approval by the Fund’s Board of Trustees (the “Board”). The Expense Limitation Agreement shall terminate with respect to the Fund upon termination of the Fund’s advisory agreement with the Investment Adviser, or it may be terminated by Voya Investors Trust (the “Trust”), without payment of any penalty, upon written notice to the Investment Adviser at its principal place of business.

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Expense Example

This Example is intended to help you compare the cost of investing in shares of the Fund with the costs of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated. The Example shows costs if you sold (redeemed) your shares at the end of the period or continued to hold them. The Example also assumes that your investment had a 5% return each year and that the Fund'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 time periods indicated. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Class	Share Status		1 Yr	3 Yrs	5 Yrs	10 Yrs
A	Sold or Held	$	320	470	634	1,110
I	Sold or Held	$	46	147	257	578
R	Sold or Held	$	97	305	530	1,177

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 and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the Expense Example, affect the Fund's performance.

During the most recent fiscal year, the Fund's portfolio turnover rate was 80% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Fund invests at least 80% of its net assets (plus the amount of any borrowings for investment purposes) in inflation-indexed bonds and other bonds and debt obligations of any kind. For purposes of this 80% policy, inflation-indexed bonds means debt instruments that are structured to provide protection against inflation and bonds and debt obligations of any kind include bonds, debt instruments, and other fixed income and income-producing debt instruments of any kind issued or guaranteed by governmental or private-sector entities. For purposes of satisfying this 80% policy, the Fund may also invest in derivative instruments that provide investment exposure to, or exposure to risk factors associated with, inflation-indexed bonds and other bonds and debt obligations of any kind.

An inflation-indexed bond’s principal amount and/or interest payments are typically adjusted based on an official inflation measure. For inflation-indexed bonds issued by the U.S. government or U.S. corporations, typically these adjustments are tied to the Consumer Price Index for Urban Consumers. Inflation-indexed bonds issued by a foreign (non-U.S.) government or foreign (non-U.S.) corporation are generally adjusted based on a comparable inflation index, calculated by the relevant foreign (non-U.S.) government.

The Fund expects to use derivative instruments, such as total return swaps, or other investment techniques, such as entering into series of purchase and sale contracts or reverse repurchase agreements, to obtain investment exposure to inflation-indexed bonds in an amount approximately equal to the net asset value of the Fund.

The Fund expects to use its remaining investable monies (after effecting exposure to inflation-indexed bonds as described above) to invest in a range of sectors of the fixed income market, including U.S. Treasuries and agency securities, commercial and residential mortgage-backed securities, collateralized loan obligations (“CLOs”), collateralized mortgage obligations, corporate bonds rated investment grade, asset-backed securities and debt securities rated below investment grade (sometimes referred to as “high-yield securities”, “high-yield bonds”, or “junk bonds”), including such obligations of foreign (non-U.S.) issuers. Investment grade refers to ratings given by nationally recognized statistical rating organizations (“NRSROs”) (e.g., rated Baa3 or above by Moody’s Ratings (“Moody’s”), or BBB- or above by S&P Global Ratings (“S&P”) or Fitch Ratings, Inc. (“Fitch”)) or, if unrated, determined by the Fund to be of comparable quality. Below investment grade refers to ratings given by NRSROs (e.g., rated Ba1 or below by Moody’s, or BB+ or below by S&P or Fitch) or, if unrated, determined by the Fund to be of comparable quality, are regarded as having more speculative characteristics with respect to the payment of interest and repayment of principal. Split rated debt instruments (debt instruments that receive different ratings from two or more NRSROs) are valued as follows: if three NRSROs rate a debt instrument, the debt instrument will be considered to have the median credit rating; if two of the three NRSROs rate a debt instrument, the debt instrument will be considered to have the lower credit rating of the two provided. The Fund’s allocation to these sectors will vary over time, and the Fund may invest significantly in one or more of these sectors.

The Fund seeks to construct a portfolio with an average portfolio duration that is within ±20% of the duration of the Bloomberg U.S. Treasury Inflation Protected Securities Index. Duration is a commonly used measure of risk in debt instruments as it incorporates multiple features of debt instruments (e.g., yield, coupon, maturity, etc.) into one number. Duration is a measure

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of sensitivity of the price of a debt instrument to a change in interest rates. Duration is a weighted average of the times that interest payments and the final return of principal are received. The weights are the amounts of the payments discounted by the yield-to-maturity of the debt instrument. Duration is expressed as a number of years. The bigger the duration number, the greater the interest rate risk or reward for the debt instrument prices. For example, the price of a bond with an average duration of 5 years would be expected to fall approximately 5% if market interest rates rose by 1%. Conversely, the price of a bond with an average duration of 5 years would be expected to rise approximately 5% if market interest rates dropped by 1%.

The Fund invests at least 80% of its assets in a portfolio of instruments rated investment grade. Although the Fund may invest up to 20% of its assets in debt instruments rated below investment grade, the Fund will seek to maintain a minimum weighted average portfolio quality rating of at least investment grade.

The Fund may also invest up to 20% of its assets in non-dollar denominated securities of foreign (non-U.S.) issuers, including issuers in developing and emerging markets, and may invest, without limit, in U.S. dollar denominated securities of foreign (non-U.S.) issuers. The Fund currently considers developing or emerging market countries to include most countries in the world except Australia, Canada, Japan, New Zealand, Hong Kong, Singapore, the United Kingdom, the United States, and most of the countries of Western Europe.

The Fund may invest in derivative instruments, including, but not limited to, the following: options, futures, swaps (including interest rate swaps, total return swaps, and credit default swaps), and forward foreign currency exchange contracts. The Fund typically uses derivatives to reduce exposure to other risks, such as interest rate risk or currency risk, as a substitute for taking a position in the underlying asset, and/or to enhance returns.

The Fund’s total investment exposure (direct investments and indirect investment exposure via derivative instruments) will typically be in excess of the Fund’s net asset value, and potentially substantially so. This manner of investing may increase the volatility of the Fund’s performance.

In evaluating investments for the Fund, the sub-adviser (the “Sub-Adviser”) takes into account a wide variety of factors and considerations to determine whether any or all of those factors or considerations might have a material effect on the value, risks, or prospects of an investment. Among the factors considered, the Sub-Adviser expects typically to take into account environmental, social, and governance (“ESG”) factors to determine whether one or more factors may have a material effect. In considering ESG factors, the Sub-Adviser intends to rely primarily on factors identified through its proprietary empirical research and on third-party evaluations of an issuer’s ESG standing, when available. ESG factors will be only one of many considerations in the Sub-Adviser’s evaluation of any potential investment; the extent to which ESG factors will affect the Sub-Adviser’s decision to invest in an issuer, if at all, will depend on the analysis and judgment of the Sub-Adviser.

The Fund may also invest in other investment companies, including exchange-traded funds (“ETFs”), to the extent permitted under the Investment Company Act of 1940, as amended, and the rules and regulations thereunder, and under the terms of applicable no-action relief or exemptive orders granted thereunder.

The Sub-Adviser may sell securities for a variety of reasons, such as to secure gains, limit losses, or redeploy assets into opportunities believed to be more promising.

The Fund may lend portfolio securities on a short-term or long-term basis, up to 33 1∕3% of its total assets.

Principal Risks

You could lose money on an investment in the Fund. Any of the following risks, among others, could affect Fund performance or cause the 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.

Borrowing: Borrowing creates leverage, which may increase expenses and increase the impact of the Fund’s other risks. Borrowing may exaggerate any increase or decrease in the Fund’s net asset value causing the Fund to be more volatile than a fund that does not borrow. Borrowing for investment purposes is considered to be speculative and may result in losses to the Fund.

Collateralized Loan Obligations and Other Collateralized Obligations: A collateralized loan obligation (“CLO”) is an obligation of a trust or other special purpose vehicle typically collateralized by a pool of loans, which may include senior secured and unsecured loans and subordinate corporate loans, including loans that may be rated below investment grade, or equivalent unrated loans. CLOs may incur management fees and administration fees. The risks of investing in a CLO depend largely on the type of the collateral held in the CLO portfolio and the tranche of securities in which the Fund may invest, and can generally be

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summarized as a combination of economic risks of the underlying loans combined with the risks associated with the CLO structure governing the priority of payments, and include interest rate risk, credit risk, liquidity risk, prepayment and extension risk, and the risk of default of the underlying asset, among others.

Covenant-Lite Loans: Loans in which the Fund may invest or to which the Fund may gain exposure indirectly through its investments in collateralized debt obligations, CLOs or other types of structured securities may be considered “covenant-lite” loans. Covenant-lite refers to loans which do not incorporate traditional performance-based financial maintenance covenants. Covenant-lite does not refer to a loan’s seniority in a borrower’s capital structure nor to a lack of the benefit from a legal pledge of the borrower’s assets and does not necessarily correlate to the overall credit quality of the borrower. Covenant-lite loans generally do not include terms which allow a lender to take action based on a borrower’s performance relative to its covenants. Such actions may include the ability to renegotiate and/or re-set the credit spread on the loan with a borrower, and even to declare a default or force the borrower into bankruptcy restructuring if certain criteria are breached. Covenant-lite loans typically still provide lenders with other covenants that restrict a borrower from incurring additional debt or engaging in certain actions. Such covenants can only be breached by an affirmative action of the borrower, rather than by a deterioration in the borrower’s financial condition. Accordingly, the Fund may have fewer rights against a borrower when it invests in, or has exposure to, covenant-lite loans and, accordingly, may have a greater risk of loss on such investments as compared to investments in, or exposure to, loans with additional or more conventional covenants.

Credit: The Fund could lose money if the issuer or guarantor of a debt instrument in which the Fund invests, or the counterparty to a derivative contract the Fund 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. Asset-backed (including mortgage-backed) securities that are not issued by U.S. government agencies may have a greater risk of default because they are not guaranteed by either the U.S. government or an agency or instrumentality of the U.S. government. The credit quality of typical asset-backed securities depends primarily on the credit quality of the underlying assets and the structural support (if any) provided to the securities.

Credit Default Swaps: The Fund 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 Fund would effectively add leverage to its portfolio because, in addition to its total net assets, the Fund 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 Fund to different kinds of costs and risks. In addition, credit default swaps expose the Fund to the risk of improper valuation.

Currency: To the extent that the Fund 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 Fund 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 Fund. Therefore, the purchase of certain derivatives may have an economic leveraging effect on the Fund and exaggerate any increase or decrease in the net asset value. Derivatives may not perform as expected, so the Fund 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.

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Environmental, Social, and Governance (Fixed Income): The Sub-Adviser’s consideration of ESG factors in selecting investments for the Fund is based on information that is not standardized, some of which can be qualitative and subjective by nature. The Sub-Adviser’s assessment of ESG factors in respect of obligations of an issuer may rely on third-party data that might be incorrect or based on incomplete or inaccurate information. There is no minimum percentage of the Fund’s assets that will be invested in obligations of issuers that the Sub-Adviser views favorably in light of ESG factors, and the Sub-Adviser may choose not to invest in obligations of issuers that compare favorably to obligations of other issuers on the basis of ESG factors. It is possible that the Fund will have less exposure to obligations of certain issuers due to the Sub-Adviser’s assessment of ESG factors than other comparable mutual funds. There can be no assurance that an investment selected by the Sub-Adviser, which includes its consideration of ESG factors, when available, will provide more favorable investment performance than another potential investment, and such an investment may, in fact, underperform other potential investments.

Foreign (Non-U.S.) Investments/Developing and Emerging Markets: Investing in foreign (non-U.S.) securities may result in the Fund 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 the threat of new or modified 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.

High-Yield Securities: Lower-quality securities including securities that are or have fallen below investment grade (commonly referred to as “junk bonds”) 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 debt 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.

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 debt instruments, such 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 debt instruments; conversely, values generally rise as market interest rates fall. Interest rate risk is generally greater for debt instruments than floating-rate instruments. 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 debt instrument to a change in interest rate. Rising market interest rates have unpredictable effects on the markets and may expose debt and related markets to heightened volatility. To the extent that the Fund invests in debt 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 Fund to liquidate portfolio positions when it may not be advantageous to do so and may lower returns. If dealer capacity in debt markets is insufficient for market conditions, it may further inhibit liquidity and increase volatility in debt markets. Fiscal, economic, monetary, or other governmental policies or measures have in the past, and may in the future, cause or exacerbate risks associated with interest rates, including changes in interest rates. Declining market interest rates increase the likelihood that debt instruments will be pre-paid. 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 debt and related markets to heightened volatility. In the case of inverse debt instruments, the interest rate paid by the debt instruments is a floating rate, which will generally decrease when the market rate of interest to which the inverse debt instruments are indexed increases and will increase when the market rate of interest to which the inverse debt instruments are indexed decreases. Changes to monetary policy by the U.S. Federal Reserve Board or other regulatory actions could expose debt and related markets to heightened volatility, interest rate sensitivity, and reduced liquidity, which may impact the Fund’s operations and return potential.

Liquidity: If a security is illiquid, the Fund might be unable to sell the security at a time when the Fund’s manager might wish to sell, or at all. Further, the lack of an established secondary market may make it more difficult to value illiquid securities, exposing the Fund 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 Fund, which could cause the Fund to lose money. The prices of illiquid securities may be more volatile

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than more liquid securities, and the risks associated with illiquid securities may be greater in times of financial stress. Certain securities that are liquid when purchased may later become illiquid, particularly in times of overall economic distress or due to geopolitical events such as sanctions, trading halts, or wars. In addition, markets or securities may become illiquid quickly.

Market Disruption and Geopolitical: The Fund 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, trade disputes, tariffs and other restrictions on trade or economic sanctions, rapid technological developments (such as artificial intelligence technologies), 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 resulted 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. Pandemics and other disruptions may also create challenges for real estate markets, including lower occupancy rates, decreased lease payments, defaults, and foreclosures, among other consequences. Natural and environmental disasters and systemic market dislocations are also highly disruptive to economies and markets. Military action by Russia in Ukraine, the prolonged conflict between Hamas and Israel, the Iranian conflict that commenced in February 2026, and political upheaval in Venezuela have resulted, and may continue to result, in sanctions, market disruptions, declines in regional and global stock markets, unusual volatility in global commodity markets, and disruptions to energy production or transportation, including through key shipping routes, any of which could adversely affect the value of the Fund's investments, including beyond the Fund's direct exposure to issuers in the affected regions. The escalation or expansion of hostilities, including the involvement of additional nations, could introduce further uncertainty and volatility in global energy, commodity, and financial markets. The extent and duration of these conflicts, related sanctions, and resulting market disruptions are impossible to predict but could be substantial. A number of U.S. domestic banks and foreign (non-U.S.) banks have experienced financial difficulties and, in some cases, failures. There can be no certainty that the actions taken by regulators to limit the effect of those financial difficulties and failures on other banks or other financial institutions or on the U.S. or foreign (non-U.S.) economies generally will be successful. It is possible that more banks or other financial institutions will experience financial difficulties or fail, which may affect adversely other U.S. or foreign (non-U.S.) financial institutions and economies. These 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 Fund’s investments. Any of these occurrences could disrupt the operations of the Fund and of the Fund’s service providers. Recent technological developments in, and the increasingly widespread use of, artificial intelligence, including machine learning technology and generative artificial intelligence (“AI”), may pose risks to the Fund. For instance, the economy may be significantly impacted by the advanced development and increased regulation of AI. As AI is used more widely, the profitability and growth of Fund holdings may be impacted, which could significantly impact the overall performance of the Fund. The legal and regulatory frameworks within which AI operates continue to rapidly evolve, and it is not possible to predict the full extent of current or future risks related thereto.

Mortgage- and/or Asset-Backed Securities: Defaults on, or low credit quality or liquidity of, the underlying assets of the asset-backed (including mortgage-backed) securities may impair the value of these securities and result in losses. There may be limitations on the enforceability of any security interest or collateral granted with respect to those underlying assets, and the value of collateral may not satisfy the obligation upon default. These securities also present a higher degree of prepayment and extension risk and interest rate risk than do other types of debt instruments.

Option Writing: When the Fund writes a covered call option on a security, it assumes the risk that it must sell the underlying security at an exercise price that may be lower than the market price of the security, and it gives up the opportunity to profit from a price increase in the underlying security above the exercise price. In addition, the Fund continues to bear the risk of a decline in the value of the underlying security.

When the Fund writes an index call option, it assumes the risk that it must pay the purchaser of the option a cash payment equal to any appreciation in the value of the index over the strike price of the call option during the option’s term. While the amount of the Fund’s potential loss is offset by the premium received when the option was written, the amount of the loss is theoretically unlimited.

Other Investment Companies: The main risk of investing in other investment companies, including ETFs, is the risk that the value of an investment company’s underlying investments might decrease. Shares of investment companies that are listed on an exchange may trade at a discount or premium from their net asset value. You will pay a proportionate share of the expenses of those other investment companies (including management fees, administration fees, and custodial fees) in addition to the Fund’s expenses. The investment policies of the other investment companies may not be the same as those of the Fund; as a result, an investment in the other investment companies may be subject to additional or different risks than those

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to which the Fund is typically subject. In addition, shares of ETFs may trade at a premium or discount to net asset value and are subject to secondary market trading risks. Secondary markets may be subject to irregular trading activity, wide bid/ask spreads, and extended trade settlement periods in times of market stress because market makers and authorized participants may step away from making a market in an ETF’s shares, which could cause a material decline in the ETF’s net asset value.

Prepayment and Extension: Many types of debt instruments are subject to prepayment and extension risk. Prepayment risk is the risk that the issuer of a debt instrument will pay back the principal earlier than expected. This risk is heightened in a falling market interest rate environment. Prepayment may expose the Fund to a lower rate of return upon reinvestment of principal. Also, if a debt 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 debt 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 debt instrument decreases when principal payments are made later than expected. Additionally, the Fund may be prevented from investing proceeds it would have received at a given time at the higher prevailing interest rates.

Securities Lending: Securities lending involves two primary risks: “investment risk” and “borrower default risk.” When lending securities, the Fund will receive cash or U.S. government securities as collateral. Investment risk is the risk that the Fund will lose money from the investment of the cash collateral received from the borrower. Borrower default risk is the risk that the Fund will lose money due to the failure of a borrower to return a borrowed security. Securities lending may result in leverage. The use of leverage may exaggerate any increase or decrease in the net asset value, causing the Fund to be more volatile. The use of leverage may increase expenses and increase the impact of the Fund’s other risks.

Sovereign Debt: Sovereign debt is issued or guaranteed by foreign (non-U.S.) government entities. Investments in sovereign debt are subject to the risk that a government entity may delay payment, restructure its debt, or refuse to pay interest or repay principal on its sovereign debt due to cash flow problems, insufficient foreign currency reserves, political considerations, social changes, the relative size of its debt position to its economy, or its failure to put in place economic reforms required by the International Monetary Fund or other multilateral agencies. If a government entity defaults, it may ask for more time in which to pay or for further loans. There is no legal process for collecting amounts owed on sovereign debt, such as bankruptcy proceedings, that a government does not pay.

U.S. Government Securities and Obligations: U.S. government securities are obligations of, or guaranteed by, the U.S. government, its agencies, or government-sponsored enterprises. U.S. government securities are subject to market risk and interest rate risk, and may be subject to varying degrees of credit risk.

An investment in the Fund 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 Fund. The following bar chart shows the changes in the Fund's performance from year to year, and the table compares the Fund's performance to the performance of a broad-based securities market index and an additional index with investment characteristics similar to those of the Fund for the same period. The Fund uses the Bloomberg U.S. Aggregate Bond Index as its primary benchmark in accordance with regulatory disclosure requirements and uses the Bloomberg U.S. TIPS Index as an additional benchmark that the Investment Adviser believes more closely reflects the Fund’s principal investment strategies. The Fund'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 bar chart shows the performance of the Fund's Class R shares. Prior to July 17, 2026, Class R shares were referred to as Class ADV shares. Performance for other share classes would differ to the extent they have differences in their fees and expenses.

Because Class A shares of the Fund had not commenced operations as of the calendar year ended December 31, 2025, no performance information for Class A shares is provided below. The Fund's past performance (before and after taxes) is no guarantee of future results. For the most recent performance figures, go to https://individuals.voya.com/literature or call 1-800-992-0180.

The Fund’s performance prior to December 6, 2024 reflects returns achieved by a different sub-adviser and pursuant to different principal investment strategies. If the Fund’s current sub-adviser and principal investment strategies had been in place for the prior periods, the performance information shown would have been different.

Summary Prospectus

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Voya Inflation Protected Bond Plus Fund

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

Best quarter:	2nd Quarter 2020	6.04%
Worst quarter:	2nd Quarter 2022	-7.42%

Average Annual Total Returns %
(for the periods ended December 31, 2025)

		1 Yr	5 Yrs	10 Yrs	Since Inception	Inception Date
Class I	%	7.30	0.97	2.84	N/A	4/30/2007
Bloomberg U.S. Aggregate Bond Index1	%	7.30	-0.36	2.01	N/A
Bloomberg U.S. TIPS Index1	%	7.01	1.12	3.09	N/A
Class R before taxes	%	6.64	0.35	2.23	N/A	4/30/2007
After tax on distributions	%	4.90	-1.00	1.30	N/A
After tax on distributions with sale	%	3.91	-0.31	1.32	N/A
Bloomberg U.S. Aggregate Bond Index1	%	7.30	-0.36	2.01	N/A
Bloomberg U.S. TIPS Index1	%	7.01	1.12	3.09	N/A

The index returns do not reflect deductions for fees, expenses, or taxes.

After-tax returns are calculated using the historical highest individual U.S. federal marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on an investor's tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-advantaged arrangements such as 401(k) plans or individual retirement accounts (“IRAs”). In some cases the after-tax returns may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of Fund shares at the end of the measurement period. After-tax returns are shown for Class R shares only. After-tax returns for other classes will vary.

Portfolio Management

Investment Adviser

Voya Investments, LLC

Sub-Adviser

Voya Investment Management Co. LLC

Portfolio Managers
Sean Banai, CFA Portfolio Manager (since 12/2024)	Rajen Jadav, CFA Portfolio Manager (since 2/2026)
Anuranjan Sharma Portfolio Manager (since 12/2024)	Vinay Viralam, CFA Portfolio Manager (since 2/2026)

Purchase and Sale of Fund Shares

Shares of the Fund may be purchased or sold on any business day (normally any day when the New York Stock Exchange opens for regular trading). You can buy or sell shares of the Fund through a broker-dealer or other financial intermediary; by visiting our website at https://individuals.voya.com/product/mutual-fund/prospectuses-reports; by writing to us at Voya Investment Management, P.O. Box 534480, Pittsburgh, Pennsylvania 15253-4480; or by calling us at 1-800-992-0180.

Summary Prospectus

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Voya Inflation Protected Bond Plus Fund

Minimum Initial Investment $ by share class

Class		A	I	R
Non-retirement accounts	$	1,000	250,000	None
Retirement accounts	$	250	250,000	None
Certain omnibus accounts	$	250	None	None
Pre-authorized investment plan	$	1,000	250,000	None

There are no minimums for additional investments except that the pre-authorized investment plan requires a monthly investment of at least $100. For Class I shares, there is no minimum initial investment requirement for: (i) qualified retirement plans or other defined contribution plans and defined benefit plans that invest in the Voya funds through omnibus arrangements; (ii) employees of Voya Investment Management Co. LLC (“Voya IM”) who are eligible to participate in “notional” bonus programs sponsored by Voya IM; or (iii) (a) investors transacting in Class I shares through brokerage platforms that invest in the Voya funds’ Class I shares through omnibus accounts and have agreements with the distributor to offer such shares and (b) such brokerage platforms’ omnibus accounts.

Tax Information

The Fund's distributions are generally taxable to you as ordinary income, capital gains, or a combination of the two, unless you are investing through a tax-advantaged arrangement, such as a 401(k) plan or an IRA. If you are investing through a tax-advantaged arrangement, you may be taxed upon withdrawals from that arrangement.

Payments to Broker-Dealers and Other Financial Intermediaries

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and/or its related companies may pay the intermediary for the sale of Fund shares and/or related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary’s website for more information.

Summary Prospectus

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Voya Inflation Protected Bond Plus Fund