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Summary Prospectus

Touchstone Large Cap FundOctober 28, 2026

Class A Ticker: TACLX Class C Ticker: TFCCX

Class Y Ticker: TLCYX Institutional Class: TLCIX

Before you invest, you may want to review the Fund’s prospectus, which contains information about the Fund and its risks. The Fund’s prospectus and Statement of Additional Information, both dated October 28, 2026, as amended from time to time, are incorporated by reference into this summary prospectus. For free paper or electronic copies of the Fund’s prospectus and other information about the Fund, go to TouchstoneInvestments.com/Resources, call 1.800.543.0407, or ask any financial adviser, bank, or broker-dealer who offers shares of the Fund.

Touchstone Large Cap Fund Summary

The Fund’s Investment Goal

The Touchstone Large Cap Fund (the “Fund”) seeks to provide investors with long-term capital growth.

The Fund’s Fees and Expenses

This table describes 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 for Class A shares of Touchstone equity funds and Touchstone fixed income funds if you and your family invest, or agree to invest in the future, at least $25,000 or $50,000, respectively, in Touchstone funds. More information about these and other discounts is available from your financial professional, in the section titled “Choosing a Class of Shares” in the Fund’s prospectus and Statement of Additional Information on pages 61 and 70, respectively, and in Appendix A–Intermediary-Specific Sales Charge Waivers and Discounts to the Fund's prospectus.

	Class A	Class C	Class Y	Institutional Class
Shareholder Fees (fees paid directly from your investment)
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	5.00%	None	None	None
Maximum Deferred Sales Charge (Load) (as a percentage of original purchase price or the amount redeemed, whichever is less)	None	1.00%	None	None
Wire Redemption Fee	$15	$15	$15	$15


Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Management Fees	0.60%	0.60%	0.60%	0.60%
Distribution and/or Shareholder Service (12b-1) Fees	0.25%	1.00%	None	None
Other Expenses
Liquidity Provider Expense	0.01%	0.01%	0.01%	0.01%
Other Operating Expenses	0.51%	2.39%	0.27%	0.21%
Total Other Expenses	0.52%	2.40%	0.28%	0.22%
Total Annual Fund Operating Expenses	1.37%	4.00%	0.88%	0.82%
Fee Waiver and/or Expense Reimbursement(1)	(0.33)%	(2.26)%	(0.09)%	(0.13)%
Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement(1)	1.04%	1.74%(2)	0.79%	0.69%

(1)

Touchstone Advisors, Inc. (the “Adviser” or “Touchstone Advisors”) and Touchstone Strategic Trust (the “Trust”) have entered into a contractual expense limitation agreement whereby Touchstone Advisors will waive a portion of its fees

Touchstone Large Cap FundOctober 28, 2026

or reimburse certain Fund expenses (excluding dividend and interest expenses relating to short sales; interest; taxes; brokerage commissions and other transaction costs; portfolio transaction and investment related expenses, including expenses associated with the Fund’s liquidity providers; other expenditures which are capitalized in accordance with U.S. generally accepted accounting principles; the cost of “Acquired Fund Fees and Expenses”, if any; and other extraordinary expenses not incurred in the ordinary course of business) in order to limit annual Fund operating expenses to 1.03%, 1.74%, 0.78%, and 0.68% of average daily net assets for Classes A, C, Y, and Institutional Class shares respectively. This contractual expense limitation is effective through October 29, 2027, but can be terminated by a vote of the Board of Trustees of the Trust (the “Board”) if it deems the termination to be beneficial to the Fund’s shareholders. The terms of the contractual expense limitation agreement provide that Touchstone Advisors is entitled to recoup, subject to approval by the Board, such amounts waived or reimbursed for a period of up to three years from the date on which the Adviser reduced its compensation or assumed expenses for the Fund. The Fund will make repayments to the Adviser only if such repayment does not cause the annual Fund operating expenses (after the repayment is taken into account) to exceed both (1) the expense cap in place when such amounts were waived or reimbursed and (2) the Fund’s current expense limitation.

(2)

Total Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement will differ from the ratio of net expenses to average net assets that is included in the Fund's Form N-CSR filing for the fiscal year ended June 30, 2026 due to contractual changes in the Fund's expense limitation agreement effective October 29, 2025.

Example. This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then, except as indicated, redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year, that the Fund’s operating expenses remain the same and that all fee waivers or expense limits for the Fund will expire after one year. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

	Assuming Redemption at End of Period				Assuming No Redemption
	Class A	Class C	Class Y	Institutional Class	Class C
1 Year	$601	$277	$81	$70	$177
3 Years	$881	$1,011	$272	$249	$1,011
5 Years	$1,183	$1,862	$479	$442	$1,862
10 Years	$2,037	$4,066	$1,076	$1,001	$4,066

Portfolio Turnover. The Fund pays transaction costs, such as brokerage 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 total annual Fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 12% of the average value of the Fund’s portfolio.

The Fund’s Principal Investment Strategies

The Fund invests, under normal market conditions, at least 80% of its assets in common stocks of large capitalization U.S. listed companies. For purposes of the Fund, a large capitalization company has a market capitalization within the range represented in the Russell 1000® Index (between approximately $1.7 billion and $5.5 trillion as of September 30, 2026) at the time of purchase. The size of the companies in the Russell 1000® Index will change with market conditions.

Touchstone Large Cap FundOctober 28, 2026

London Company of Virginia d/b/a The London Company (“The London Company”), the Fund’s sub-adviser, seeks to purchase financially stable large-cap companies that it believes are consistently generating high returns on unleveraged operating capital, run by shareholder-oriented management, and trading at a discount to the company’s respective private market values. Guiding principles of The London Company’s large-cap philosophy include: (1) a focus on cash return on tangible capital, not earnings per share; (2) balance sheet optimization; (3) optimal allocation of investments is essential to good investment results; and (4) low turnover and tax sensitivity enhances real returns.

The Fund will typically hold approximately 30 to 40 securities. The London Company invests for the long term and attempts to minimize turnover in an effort to reduce transaction costs and taxes. The Fund may invest a high percentage of its assets in specific sectors of the market in order to achieve a potentially greater investment return. The London Company generally sells a security when: it becomes overvalued and has reached its price target; the issuer’s fundamentals deteriorate; there is significant trading activity by insiders; or there is a more promising alternative. The London Company may also sell a security to adjust the Fund’s overall portfolio risk.

The Fund’s Principal Risks

The Fund’s share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Investments in the Fund are not bank guaranteed, are not deposits, and are not insured by the Federal Deposit Insurance Corporation or any other federal government agency. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal. You can find more information about the Fund’s investments and risks under the “Principal Investment Strategies and Risks” section of the Fund’s prospectus. The Fund is subject to the principal risks summarized below.

Equity Securities Risk: The Fund is subject to the risk that stock prices will fall over short or extended periods of time. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments, or as a result of irregular and/or unexpected trading activity among retail investors. The prices of securities issued by these companies may decline in response to such developments, which could result in a decline in the value of the Fund’s shares.

●

Large-Cap Risk: Large-cap companies may be unable to respond quickly to new competitive challenges, such as changes in technology and consumer tastes, and also may not be able to attain the high growth rate of successful smaller companies, especially during extended periods of economic expansion.

Management Risk: In managing the Fund’s portfolio, the Adviser engages one or more sub-advisers to make investment decisions for a portion of or the entire portfolio. There is a risk that the Adviser may be unable to identify and retain sub-advisers who achieve superior investment returns relative to other similar sub-advisers.

Economic and Market Events Risk: Events in the U.S. and global financial markets, including actions taken by the U.S. Federal Reserve or foreign central banks to stimulate or stabilize economic growth, may at times, and for varying periods of time, result in unusually high market volatility, which could negatively impact the Fund’s performance and cause the Fund to experience illiquidity, shareholder redemptions, or other potentially adverse effects. Reduced liquidity in credit and fixed-income markets could negatively affect issuers worldwide. Financial institutions could suffer losses as interest rates rise or economic conditions deteriorate. In addition, the Fund’s service providers are susceptible to operational and information or cybersecurity risks that could result in losses to a Fund and its shareholders.

Sector and Industry Focus Risk: The Fund may invest a high percentage of its assets in specific sectors and/or industries of the market in order to achieve a potentially greater investment return. As a result, the Fund may be more susceptible to economic, political, and regulatory developments in a particular sector or industry of the market, positive or negative, than a fund that does not invest a high percentage of its assets in specific sectors or industries.

Touchstone Large Cap FundOctober 28, 2026

Cybersecurity Risk: Cybersecurity breaches are either intentional or unintentional events that allow an unauthorized party to gain access to Fund assets, customer data, or proprietary information, or cause a Fund or Fund service provider to suffer data corruption or lose operational functionality. A cybersecurity breach could result in the loss or theft of customer data or funds, loss or theft of proprietary information or corporate data, physical damage to a computer or network system, or costs associated with system repairs, any of which could have a substantial impact on the Fund. Such incidents could affect issuers in which a Fund invests, thereby causing the Fund’s investments to lose value. The Fund has established risk management systems reasonably designed to seek to reduce the risks associated with cyber-events. However, there is no guarantee that the Fund will be able to prevent or mitigate the impact of any or all cyber-events.

The Fund’s Performance

The bar chart and performance table below illustrate some indication of the risks and volatility of an investment in the Fund by showing changes in the Fund’s performance from calendar year to calendar year and by showing how the Fund’s average annual total returns for one year, five years, and ten years compare with the Bloomberg US 3000 Index and the Russell 3000® Index. Bloomberg US 1000 Index and Russell 1000® Index show how the Fund’s performance compares against the returns of indexes with similar investment universes. The bar chart does not reflect any sales charges, which would reduce your return. The performance table reflects any applicable sales charges. Past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. More recent performance information is available at no cost by visiting TouchstoneInvestments.com or by calling 1.800.543.0407.

Touchstone Large Cap Fund — Class A Shares Total Return as of December 31


Best Quarter:	2nd Quarter 2020	16.74 %
Worst Quarter:	1st Quarter 2020	(22.00 )%
Year-To-Date:	9/30/2026	8.80 %

After-tax returns are calculated using the highest individual marginal federal income tax rates in effect on a given distribution reinvestment date and do not reflect the impact of state and local taxes. Your actual after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an individual retirement account (“IRA”), 401(k), or other tax-advantaged account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will

Touchstone Large Cap FundOctober 28, 2026

differ from the Class A shares’ after-tax returns. The Return After Taxes on Distributions and Sale of Fund Shares may be greater than other returns for the same period due to a tax benefit of realizing a capital loss on the sale of Fund shares.

Average Annual Total Returns For the periods ended December 31, 2025	1 Year	5 Years	10 Years
Touchstone Large Cap Fund - Class A
Return Before Taxes	2.43 %	7.31 %	8.93 %
Return After Taxes on Distributions	1.79 %	6.61 %	8.34 %
Return After Taxes on Distributions and Sale of Fund Shares	1.90 %	5.67 %	7.21 %
Touchstone Large Cap Fund - Class C
Return Before Taxes	6.04 %	7.62 %	8.93 %
Touchstone Large Cap Fund - Class Y
Return Before Taxes	8.05 %	8.68 %	9.85 %
Touchstone Large Cap Fund - Institutional Class
Return Before Taxes	8.14 %	8.79 %	9.96 %
Bloomberg US 3000 Index(1) (reflects no deduction for fees, expenses or taxes)	17.21 %	13.09 %	14.27 %
Bloomberg US 1000 Index(2) (reflects no deduction for fees, expenses or taxes)	17.51 %	13.47 %	14.55 %
Russell 3000® Index (reflects no deduction for fees, expenses or taxes)	17.15 %	13.15 %	14.29 %
Russell 1000® Index (reflects no deduction for fees, expenses or taxes)	17.37 %	13.59 %	14.59 %

(1)

The Fund changed its broad-based securities market index to the Bloomberg US 3000 Index which is similarly representative of the overall securities market applicable to the Fund.

(2)

The Fund changed its additional index to the Bloomberg US 1000 Index which has a similar investment universe to the Fund.

The Fund’s Management

Investment Adviser

Touchstone Advisors, Inc. serves as the Fund’s investment adviser.

Sub-Adviser	Portfolio Manager	Investment Experience with the Fund	Primary Title with Sub-Adviser
London Company of Virginia d/b/a The London Company	Stephen Goddard, CFA	Since inception in July 2014	Founder, CIO and Co-Lead Portfolio Manager
	J. Brian Campbell, CFA	Since October 2019	Principal and Portfolio Manager
	Sam Hutchings, CFA	Since October 2019	Principal and Co-Lead Portfolio Manager

Touchstone Large Cap FundOctober 28, 2026

Buying and Selling Fund Shares

Minimum Investment Requirements

	Classes A, C, and Y
	Initial Investment	Additional Investment
Regular Account	$2,500	$50
Retirement Account or Custodial Account under the Uniform Gifts/Transfers to Minors Act	$1,000	$50
Investments through the Automatic Investment Plan	$100	$50

	Institutional Class
	Initial Investment	Additional Investment
Regular Account	$500,000	$50

Fund shares may be purchased and sold on days that the New York Stock Exchange is open for trading. Existing Class A, Class C and Institutional Class shareholders may purchase shares directly through Touchstone Funds via the transfer agent, BNY Mellon, or through their financial intermediary. Class Y shares are available only through financial intermediaries who have appropriate selling agreements in place with Touchstone Securities, LLC (“Touchstone Securities”). Shares may be purchased or sold by writing to Touchstone Securities at P.O. Box 534467, Pittsburgh, PA 15253-4467, calling 1.800.543.0407, or visiting the Touchstone Funds’ website: TouchstoneInvestments.com. You may only sell shares over the telephone or via the Internet if the value of the shares sold is less than or equal to $100,000. If your shares are held by a processing organization or financial intermediary you will need to follow its purchase and redemption procedures. For more information about buying and selling shares, see the “Investing with Touchstone” section of the Fund’s prospectus or call 1.800.543.0407.

Tax Information

The Fund intends to make distributions that may be taxed as ordinary income or capital gains except when shares are held through a tax-advantaged account, such as a 401(k) plan or an IRA. Withdrawals from a tax-advantaged account, however, may be taxable.

Financial Intermediary Compensation

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

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