497(k) Voya MI Dynamic SMID Cap Fund

Summary Prospectus September 30, 2025, as supplemented June 3, 2026

Voya MI Dynamic SMID Cap Fund (formerly, Voya Mid Cap Research Enhanced Index Fund)

Class/Ticker: A/VYMQX; C/VYMRX; I/VYMSX; R/VYMVX; R6/VYMBX; W/VYMYX

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 September 30, 2025, as supplemented, and the audited financial statements that are included in the fund’s shareholder report dated May 31, 2025 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 growth of capital primarily through investment in a diversified portfolio of common stock of companies with small- to mid-market capitalizations.

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 $50,000 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 99), in Appendix A to the Prospectus, or the Purchase, Exchange, and Redemption of Shares section of the Statement of Additional Information (page 105).

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	5.75	None1
C	None	1.00
I	None	None
R	None	None
R6	None	None
W	None	None

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

Class		A	C	I	R	R62	W
Management Fees	%	0.55	0.55	0.55	0.55	0.55	0.55
Distribution and/or Services (12b-1) Fees	%	0.25	0.75	None	0.50	None	None
Other Expenses	%	0.27	0.27	0.21	0.27	0.15	0.27
Total Annual Fund Operating Expenses	%	1.07	1.57	0.76	1.32	0.70	0.82
Waivers and Reimbursements3	%	(0.12)	(0.12)	(0.06)	(0.12)	None	(0.12)
Total Annual Fund Operating Expenses after Waivers and Reimbursements	%	0.95	1.45	0.70	1.20	0.70	0.70

A contingent deferred sales charge of 1.00% is assessed on certain redemptions of Class A shares made within 18 months after purchase where no initial sales charge was paid at the time of purchase as part of an investment of $1,000,000 or more.

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 1.00%, 1.50%, 0.75%, 1.25%, 0.75%, and 0.75% for Class A, Class C, Class I, Class R, Class R6, and Class W shares, respectively, through October 1, 2026. This limitation is subject to possible recoupment by the Investment Adviser within 36 months of the waiver or reimbursement. The amount of the recoupment is limited to the lesser of the amounts that would be recoupable under: (i) the expense limitation in effect at the time of the waiver or reimbursement; or (ii) the expense limitation in effect at the time of recoupment. In addition, the Investment Adviser is contractually obligated to further limit expenses to 0.95%, 1.45%, 0.70%, 1.20%, 0.70%,

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and 0.70% for Class A, Class C, Class I, Class R, Class R6, and Class W shares, respectively, through October 1, 2026. The limitations do not extend to interest, taxes, other investment-related costs, leverage expenses, extraordinary expenses, other expenses not incurred in the ordinary course of business, expenses of any counsel or other persons or services retained by the Fund’s Board of Trustees (the “Board”) who are not “interested persons,” as that term is defined in the 1940 Act, and Acquired Fund Fees and Expenses. Termination or modification of these obligations requires approval by the Fund’s Board.

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:

		If you sold your shares						If you held your shares
		Number of years you own your shares						Number of years you own your shares
		1 Yr	3 Yrs	5 Yrs	10 Yrs			1 Yr	3 Yrs	5 Yrs	10 Yrs
A	$	666	885	1,120	1,795	A	$	666	885	1,120	1,795
C	$	248	484	844	1,857	C	$	148	484	844	1,857
I	$	72	237	416	937	I	$	72	237	416	937
R	$	122	406	712	1,580	R	$	122	406	712	1,580
R6	$	72	224	390	871	R6	$	72	224	390	871
W	$	72	250	443	1,002	W	$	72	250	443	1,002

The Example does not reflect sales charges (loads) on reinvested dividends (and other distributions). If these sales charges (loads) were included, your costs would be higher.

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 72% 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 investments tied to small- to mid-capitalization companies. For purposes of this 80% policy, small- to mid-capitalization companies means companies with market capitalizations that fall within the capitalization range of companies within the Russell 2500TM Index (the “Index”).

The market capitalization of companies within the Index will change with market conditions. As of March 31, 2025, the market capitalization of companies within the Index ranged from $60.5 million to $23.9 billion.

In managing the Fund, the sub-adviser and the sub-sub-adviser (together, the “Sub-Adviser”) invests in a portfolio of common stocks of small- to mid-capitalization companies that it believes have the potential to outperform the Index over the long term. The Sub-Adviser uses quantitative methods, including machine learning-based artificial intelligence (“AI”) models, to select securities for potential investment and to support portfolio trading.

As part of the securities selection process, the AI models analyze a variety of inputs, including among other things, financial, fundamental, macro, and technical characteristics. The data may include structured data (e.g., financial information) and unstructured data (e.g., press releases and news articles). The AI model is designed to identify companies whose perceived value is not reflected in the stock price by identifying persistent patterns in company data that have historically been correlated with outperformance. The Sub-Adviser utilizes a dynamic portfolio construction process and trades opportunistically based on the AI models’ selections; such trading may be frequent. The Sub-Adviser may also use other AI techniques or inputs to implement its investment strategy. Portfolio managers and analysts at the Sub-Adviser review the AI models’ selections, oversee the operation of all quantitative models, and seek to mitigate a number of risks the models might pose, including lack of transparency regarding the bases for the models' selections and any biases or operational deficiencies in the models that are identified.

Summary Prospectus

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Voya MI Dynamic SMID Cap Fund

The Fund may invest in derivative instruments including, but not limited to, put and call options. The Fund may use derivative instruments to seek to reduce exposure to other risks, such as currency risk, to substitute for taking a position in the underlying asset, to maintain equity market exposure on its cash balance, and/or to seek to enhance returns in the Fund.

The Fund may invest, to a limited extent, in foreign (non-U.S.) stocks and depositary receipts.

The Fund may invest in real estate-related securities, including real estate investment trusts (“REITs”).

The Fund may 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.

In evaluating investments for the Fund, 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 a company. Among the factors considered, the Sub-Adviser expects typically to take into account environmental, social, and governance (“ESG”) factors. 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 a company’s ESG standing. 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 a company, if at all, will depend on the analysis and judgment of the Sub-Adviser.

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.

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.

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.

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.

Environmental, Social, and Governance (Equity): 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 a company 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 companies that the Sub-Adviser views favorably in light of ESG factors, and the Sub-Adviser may choose not to invest in companies that compare favorably to other companies on the basis of ESG factors. It is possible that the Fund will have less exposure to certain companies 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, will provide more favorable investment performance than another potential investment, and such an investment may, in fact, underperform other potential investments.

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Foreign (Non-U.S.) Investments: 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.

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.

Investment Model: The Sub-Adviser’s proprietary investment model may not adequately take into account existing or unforeseen market factors or the interaction among such factors, including changes in how such factors interact, and there is no guarantee that the use of a proprietary investment model will result in effective investment decisions for the Fund. Funds that are actively managed, in whole or in part, according to a quantitative investment model (including models that utilize forms of artificial intelligence, such as machine learning) can perform differently from the market, based on the investment model and the factors used in the analysis, the weight placed on each factor, and changes from the factors’ historical trends. Technical issues in the design, development, implementation, application, and maintenance of the models (e.g., stale, or inaccurate data, human error, programming or other software issues, coding errors, and technology failures) may create errors or limitations that might go undetected or are discovered only after the errors or limitations have negatively impacted performance.

Artificial intelligence may produce inaccurate, misleading or incomplete outputs that could lead to errors in the Sub-Adviser’s decision-making, portfolio management or other business activities, which could have a negative impact on the performance of the Fund and its investments. The Sub-Adviser's ability to detect, prevent or correct these errors may be limited by the AI models' lack of transparency regarding the bases for models' selection of securities. The data and other information utilized by artificial intelligence may be insufficient, incomplete, inaccurate or contain biased information. Data deficiencies could undermine predictions or analysis that artificial intelligence models produce. In addition, the Sub-Adviser’s ability to use, manage and aggregate data may be limited by the effectiveness of its policies, systems and practices that govern how data is acquired, validated, used, stored, protected, processed, analyzed and shared. Use of artificial intelligence may also result in allegations or claims against the Sub-Adviser, the Fund or its investments related to violation of third-party intellectual property rights, unauthorized access to or use of proprietary information and failure to comply with open-source software requirements, which may adversely affect the Sub-Adviser’s ability to use the artificial intelligence model or adversely affect performance.

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 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: 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 debt 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 Fund to achieve its investment objectives.

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. The economic impacts

Summary Prospectus

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Voya MI Dynamic SMID Cap Fund

of COVID-19 have created a unique challenge for real estate markets. Many businesses have either partially or fully transitioned to a remote-working environment and this transition may negatively impact the occupancy rates of commercial real estate over time. 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 Fund’s investments, including beyond the Fund’s direct exposure to Russian issuers or nearby geographic regions. Furthermore, the prolonged conflict between Hamas and Israel, and the potential expansion of the conflict in the surrounding areas and the involvement of other nations in such conflict, such as the Houthi movement's attacks on marine vessels in the Red Sea, could further destabilize the Middle East region and introduce new uncertainties in global markets, including the oil and natural gas markets. The extent and duration of the military action, sanctions, and resulting market disruptions are impossible to predict and 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.

Mid-Capitalization Company: Investments in mid-capitalization companies may involve greater risk than is customarily associated with larger, more established companies due to the greater business risks of a limited operating history, smaller size, limited markets, and financial resources, narrow product lines, less management depth, and more reliance on key personnel. Consequently, the securities of mid-capitalization companies may have limited market stability and may be subject to more abrupt or erratic market movements than securities of larger, more established growth companies or the market averages in general.

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 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.

Portfolio Turnover: The Fund may engage in active and frequent trading of portfolio securities to carry out its investment strategies, which may result in high portfolio turnover. A high portfolio turnover rate may increase transaction costs, which may lower the Fund’s performance and may increase the likelihood of capital gains distributions.

Real Estate Companies and Real Estate Investment Trusts: Investing in real estate companies and REITs may subject the Fund 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 on rents, property taxes, 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 Fund will indirectly bear its proportionate share of expenses, including management fees, paid by each REIT in which it invests.

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.

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Voya MI Dynamic SMID Cap Fund

Small-Capitalization Company: Investments in small-capitalization companies may involve greater risk than is customarily associated with larger, more established companies due to the greater business risks of a limited operating history, small size, limited markets and financial resources, narrow product lines, less management depth and more reliance on key personnel. The securities of small-capitalization companies are subject to liquidity risk as they are often traded over-the-counter and may not be traded in volumes typically seen on national securities exchanges.

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 Fund 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 Fund’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.

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 Fund is the successor to Voya Mid Cap Research Enhanced Index Fund, a former series of Voya Series Fund, Inc. (the “Predecessor Fund”), as a result of the reorganization of the Predecessor Fund into the Fund on or about November 8, 2019 (the “Reorganization Date”). The Predecessor Fund had identical investment objectives, policies, and restrictions to those of the Fund as of the Reorganization Date. The performance in the bar chart and table prior to the Reorganization Date is that of the Predecessor 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. In 2024, the Investment Adviser changed the Fund’s primary benchmark from the S&P MidCap 400® Index to the Russell 3000® Index in accordance with changes to regulatory disclosure requirements. The Fund’s primary benchmark was selected in connection with regulatory disclosure requirements and the Fund uses as an additional benchmark that the Investment Adviser believes more closely reflets 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 A shares. Sales charges are not reflected in the bar chart. If they were, returns would be less than those shown. However, the table includes all applicable fees and sales charges. Performance for other share classes would differ to the extent they have differences in their fees and expenses.

Because Class R6 shares of the Fund had not commenced operations as of the calendar year ended December 31, 2024, no performance information for Class R6 shares is provided below.

The Fund’s performance prior to July 28, 2025 reflects returns achieved pursuant to different principal investment strategies. If the Fund’s current principal investment strategies had been in place for the prior periods, the performance information shown would have been different. The Predecessor Fund’s performance prior to May 31, 2016 reflects returns achieved pursuant to a different investment objective and different principal investment strategies than those that are currently being pursued by the Fund. If the Fund’s current investment objective and strategies had been in place for the prior periods, the performance information shown would have been different. 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.

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Voya MI Dynamic SMID Cap Fund

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

Best quarter:	4th Quarter 2020	23.27%
Worst quarter:	1st Quarter 2020	-31.72%
Year-to-date total return:	June 30, 2025	0.43%

Average Annual Total Returns %
(for the periods ended December 31, 2024)

		1 Yr	5 Yrs	10 Yrs	Since Inception	Inception Date
Class A before taxes	%	8.15	8.23	6.87	N/A	2/3/1998
After tax on distributions	%	5.36	6.44	5.23	N/A
After tax on distributions with sale	%	6.66	6.18	5.07	N/A
Russell 3000® Index1	%	23.81	13.86	12.55	N/A
Russell 2500TM Index1,2	%	12.00	8.77	8.85	N/A
S&P MidCap 400® Index1	%	13.93	10.34	9.68	N/A
Class C before taxes	%	13.14	8.99	7.10	N/A	6/30/1998
Russell 3000® Index1	%	23.81	13.86	12.55	N/A
Russell 2500TM Index1,2	%	12.00	8.77	8.85	N/A
S&P MidCap 400® Index1	%	13.93	10.34	9.68	N/A
Class I before taxes	%	15.00	9.79	7.78	N/A	2/3/1998
Russell 3000® Index1	%	23.81	13.86	12.55	N/A
Russell 2500TM Index1,2	%	12.00	8.77	8.85	N/A
S&P MidCap 400® Index1	%	13.93	10.34	9.68	N/A
Class R before taxes	%	14.42	9.25	7.25	N/A	10/24/2003
Russell 3000® Index1	%	23.81	13.86	12.55	N/A
Russell 2500TM Index1,2	%	12.00	8.77	8.85	N/A
S&P MidCap 400® Index1	%	13.93	10.34	9.68	N/A
Class W before taxes	%	15.07	9.80	7.75	N/A	8/5/2011
Russell 3000® Index1	%	23.81	13.86	12.55	N/A
Russell 2500TM Index1,2	%	12.00	8.77	8.85	N/A
S&P MidCap 400® Index1	%	13.93	10.34	9.68	N/A

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

Effective July 28, 2025, the Investment Adviser changed the secondary benchmark from the S&P MidCap 400® Index to the Russell 2500TM Index because the Russell 2500TM Index is considered by the Investment Adviser to be more reflected of the type of securities in which the Fund invests.

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 A shares only. After-tax returns for other classes will vary.

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Voya MI Dynamic SMID Cap Fund

Portfolio Management

Investment Adviser

Voya Investments, LLC

Sub-Adviser

Voya Investment Management Co. LLC

Portfolio Managers
Christine Cappabianca Portfolio Manager (since 6/2026)	Russell Shtern, CFA Portfolio Manager (since 7/2025)
Kai Yee Wong Portfolio Manager (since 8/2025)

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.

Minimum Initial Investment $ by share class

Class		A, C	I	R	R6	W
Non-retirement accounts	$	1,000	250,000	None	1,000,000	1,000
Retirement accounts	$	250	250,000	None	None	1,000
Certain omnibus accounts	$	250	None	None	None	None
Pre-authorized investment plan	$	1,000	250,000	None	None	1,000

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 MI Dynamic SMID Cap Fund

FTSE Russell Index Data Source: London Stock Exchange Group plc and its group undertakings (collectively, the “LSE Group”). © LSE Group 2025. FTSE Russell is a trading name of certain of the LSE Group companies. “FTSE®”, “Russell®”, “FTSE Russell®”, “Russell 1000®”, “Russell 2000®”, “Russell 3000®”, and “Russell Midcap®” are trade marks of the relevant LSE Group companies and are used by any other LSE Group company under license. All rights in the FTSE Russell indexes or data vest in the relevant LSE Group company which owns the index or the data. Neither LSE Group nor its licensors accept any liability for any errors or omissions in the indexes or data and no party may rely on any indexes or data contained in this communication. No further distribution of data from the LSE Group is permitted without the relevant LSE Group company’s express written consent. The LSE Group does not promote, sponsor or endorse the content of this communication.

The S&P MidCap 400® Index (the “SPDJI Index”) is a product of S&P Dow Jones Indices LLC (“SPDJI”), and has been licensed for use by Voya Services Company and certain affiliates (“Voya”). S&P® and S&P MidCap 400® are trademarks of Standard & Poor's Financial Services LLC (“S&P”); Dow Jones® is a registered trademark of Dow Jones Trademark Holdings LLC (“Dow Jones”); and these trademarks have been licensed for use by SPDJI and sublicensed for certain purposes by Voya. Voya's investment product (the “Product”) based in whole or in part on the SPDJI Index is not sponsored, endorsed, sold or promoted by SPDJI, S&P, Dow Jones or any of their respective affiliates (collectively, “S&P Dow Jones Indices”). S&P Dow Jones Indices makes no representation or warranty, express or implied, to the owners of the Product or any member of the public regarding the advisability of investing in the Product or purchasing securities generally or the ability of the SPDJI Index to track general market performance. S&P Dow Jones Indices' only relationship to Voya with respect to the Product is the licensing of the SPDJI Index and certain trademarks, service marks and/or trade names of S&P Dow Jones Indices and/or its licensors. The SPDJI Index is determined, composed and calculated by S&P Dow Jones Indices without regard to Voya or the Product. S&P Dow Jones Indices have no obligation to take the needs of Voya or the owners of the Product into consideration in determining, composing or calculating the SPDJI Index. S&P Dow Jones Indices are not responsible for and have not participated in the determination of the prices, and amount of the Product or the timing of the issuance or sale of the Product or in the determination or calculation of the equation by which the Product is to be converted into cash, surrendered or redeemed, as the case may be. S&P Dow Jones Indices have no obligation or liability in connection with the administration or marketing of the Product. There is no assurance that investment products based on the SPDJI Index will accurately track index performance or provide positive investment returns. S&P Dow Jones Indices LLC is not an investment advisor. Inclusion of a security within an index is not a recommendation by S&P Dow Jones Indices to buy, sell, or hold such security, nor is it considered to be investment advice.

S&P DOW JONES INDICES DOES NOT GUARANTEE THE ADEQUACY, ACCURACY, TIMELINESS AND/OR THE COMPLETENESS OF THE SPDJI INDEX OR ANY DATA RELATED THERETO OR ANY COMMUNICATION, INCLUDING BUT NOT LIMITED TO, ORAL OR WRITTEN COMMUNICATION (INCLUDING ELECTRONIC COMMUNICATIONS) WITH RESPECT THERETO. S&P DOW JONES INDICES SHALL NOT BE SUBJECT TO ANY DAMAGES OR LIABILITY FOR ANY ERRORS, OMISSIONS, OR DELAYS THEREIN. S&P DOW JONES INDICES MAKE NO EXPRESS OR IMPLIED WARRANTIES, AND EXPRESSLY DISCLAIMS ALL WARRANTIES, OF MERCHANT ABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR USE OR AS TO RESULTS TO BE OBTAINED BY VOYA, OWNERS OF THE PRODUCT, OR ANY OTHER PERSON OR ENTITY FROM THE USE OF THE SPDJI INDEX OR WITH RESPECT TO ANY DATA RELATED THERETO. WITHOUT LIMITING ANY OF THE FOREGOING, IN NO EVENT WHATSOEVER SHALL S&P DOW JONES INDICES BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES INCLUDING BUT NOT LIMITED TO, LOSS OF PROFITS, TRADING LOSSES, LOST TIME OR GOODWILL, EVEN IF THEY HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES, WHETHER IN CONTRACT, TORT, STRICT LIABILITY, OR OTHERWISE. THERE ARE NO THIRD PARTY BENEFICIARIES OF ANY AGREEMENTS OR ARRANGEMENTS BETWEEN S&P DOW JONES INDICES AND VOYA, OTHER THAN THE LICENSORS OF S&P DOW JONES INDICES.

Summary Prospectus

208983 (0626-060326)