Summary Prospectus by Investment Company - Form 497K

Summary Prospectus September 30, 2024

Voya MidCap Opportunities Fund

Class/Ticker: A/NMCAX; C/NMCCX; I/NMCIX; R/IMORX; R6/IMOZX; W/IMOWX

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 [email protected]; 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, 2024, and the audited financial statements that are included in the fund's shareholder report dated May 31, 2024 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 long-term capital appreciation.

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 93), in Appendix A to the Prospectus, or the Purchase, Exchange, and Redemption of Shares section of the Statement of Additional Information (page 106).

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

Class		A	C	I	R	R6	W
Management Fees	%	0.84	0.84	0.84	0.84	0.84	0.84
Distribution and/or Shareholder Services (12b-1) Fees	%	0.25	1.00	None	0.50	None	None
Other Expenses	%	0.16	0.16	0.10	0.16	0.04	0.16
Total Annual Fund Operating Expenses	%	1.25	2.00	0.94	1.50	0.88	1.00
Waivers, Reimbursements and Recoupments3	%	None	None	(0.01)	None	(0.05)	None
Total Annual Fund Operating Expenses After Waivers, Reimbursements and Recoupments	%	1.25	2.00	0.93	1.50	0.83	1.00

to interest, taxes, investment-related costs, leverage expenses, extraordinary expenses, and Acquired Fund Fees and Expenses. Termination or modification of these obligations requires approval by the Fund's Board of Trustees (the "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 three-, five-, and ten-year periods. 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	$	695	949	1,222	1,999		A	$	695	949	1,222	1,999
C	$	303	627	1,078	2,327		C	$	203	627	1,078	2,327
I	$	95	299	519	1,154		I	$	95	299	519	1,154
R	$	153	474	818	1,791		R	$	153	474	818	1,791
R6	$	85	276	483	1,080		R6	$	85	276	483	1,080
W	$	102	318	552	1,225		W	$	102	318	552	1,225

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 70% of the average value of its portfolio.

Principal Investment Strategies

Under normal market conditions, the Fund invests at least 80% of its net assets (plus borrowings for investment purposes) in common stocks of mid-sized U.S. companies. The Fund will provide shareholders with at least 60 days' prior notice of any change in this investment policy.

The Fund normally invests in companies that the sub-adviser (the "Sub-Adviser") believes have above average prospects for growth. For this Fund, the Sub-Adviser defines mid-sized companies as companies with market capitalizations that fall within the range of companies within the Russell Midcap® Growth Index (the "Index") at the time of purchase. The market capitalization of companies within the Index will change with market conditions. As of June 30, 2024, the market capitalization of companies within the Index ranged from $477.2 million to $93.4 billion.

In managing the Fund, the Sub-Adviser uses a stock selection process that combines quantitative screens with rigorous fundamental security analysis. The quantitative screens focus the fundamental analysis by seeking to identify the stocks of companies that exhibit strong business momentum and relative price strength, and which have a perceived value by the Sub-Adviser that is not reflected in the current price. The fundamental security analysis is intended to confirm the persistence of the company's revenue and earnings growth and validate the Sub-Adviser's expectations for earnings estimate revisions, particularly relative to consensus estimates. A determination of reasonable valuation for individual securities is based on the judgment of the Sub-Adviser.

The Fund may also invest in derivative instruments, which include, but are not limited to, futures or index futures that have a similar profile to the Index. The Fund typically uses derivative instruments to maintain equity market exposure on its cash balance.

The Fund may also invest in foreign (non-U.S.) securities.

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.

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 interplay, including changes in the interplay, between such factors, 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. Mistakes in the construction and implementation of the investment models (including, for example, data problems and/or software issues) may create errors or limitations that might go undetected or are discovered only after the errors or limitations have negatively impacted 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.

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, 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 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. 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 recently 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.

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.

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 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'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.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.

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

Best quarter:	2nd Quarter 2020	25.89%
Worst quarter:	2nd Quarter 2022	-20.89%
Year-to-date total return:	June 30, 2024	5.66%

Average Annual Total Returns %
(for the periods ended December 31, 2023)

		1 Yr	5 Yrs	10 Yrs	Since Inception	Inception Date
Class A before taxes	%	15.93	11.65	8.68	N/A	8/20/1998
After tax on distributions	%	15.66	8.26	5.26	N/A
After tax on distributions with sale	%	9.62	8.47	5.88	N/A
Russell 3000® Index1,2	%	25.96	15.16	11.48	N/A
Russell Midcap® Growth Index2	%	25.87	13.81	10.57	N/A
Russell Midcap® Index2	%	17.23	12.68	9.42	N/A
Class C before taxes	%	20.94	12.13	8.67	N/A	8/20/1998
Russell 3000® Index1,2	%	25.96	15.16	11.48	N/A
Russell Midcap® Growth Index2	%	25.87	13.81	10.57	N/A
Russell Midcap® Index2	%	17.23	12.68	9.42	N/A
Class I before taxes	%	23.34	13.33	9.67	N/A	8/20/1998
Russell 3000® Index1,2	%	25.96	15.16	11.48	N/A
Russell Midcap® Growth Index2	%	25.87	13.81	10.57	N/A
Russell Midcap® Index2	%	17.23	12.68	9.42	N/A
Class R before taxes	%	22.70	12.71	9.06	N/A	8/5/2011
Russell 3000® Index1,2	%	25.96	15.16	11.48	N/A
Russell Midcap® Growth Index2	%	25.87	13.81	10.57	N/A
Russell Midcap® Index2	%	17.23	12.68	9.42	N/A
Class R6 before taxes	%	23.49	13.44	9.78	N/A	5/31/2013
Russell 3000® Index1,2	%	25.96	15.16	11.48	N/A
Russell Midcap® Growth Index2	%	25.87	13.81	10.57	N/A
Russell Midcap® Index2	%	17.23	12.68	9.42	N/A
Class W before taxes	%	23.23	13.25	9.59	N/A	6/1/2009
Russell 3000® Index1,2	%	25.96	15.16	11.48	N/A
Russell Midcap® Growth Index2	%	25.87	13.81	10.57	N/A
Russell Midcap® Index2	%	17.23	12.68	9.42	N/A

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.

Portfolio Management

Investment Adviser

Voya Investments, LLC

Sub-Adviser

Voya Investment Management Co. LLC

Portfolio Managers
Kristy Finnegan, CFA Portfolio Manager (since 08/19)	Leigh Todd, CFA Portfolio Manager (since 12/21)

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 www.voyainvestments.com; 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.