stba-20260727 0000719220 false 0000719220 2026-07-27 2026-07-27 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934 July 27, 2026 Date of Report (date of earliest event reported) S & T BANCORP, INC (Exact name of registrant as specified in its charter) Pennsylvania 0-12508 25-1434426 (State or other jurisdiction of incorporation or organization) (Commission File Number) (I.R.S. Employer Identification No.) 800 Philadelphia Street Indiana PA 15701 (Address of Principal Executive Offices) (Zip Code) ( 800 ) 325-2265 Registrant's telephone number, including area code (Not applicable) (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol(s) Name of each exchange on which registered Common Stock, $2.50 par value STBA NASDAQ Global Select Market Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐ Item 7.01 Regulation FD Disclosure. The attached investor presentation contains financial data that members of management will use from time to time during visits with investors, analysts and other interested parties to assist in their understanding of S&T Bancorp, Inc. (“S&T”). This investor presentation is available on S&T’s website at www.stbancorp.com. A copy of the investor presentation is attached as Exhibit 99.1 to this report and is incorporated herein by reference. The information in this Current Report on Form 8-K is being furnished under Item 7.01 and shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of such section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing. Item 9.01 Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description of Exhibit 99.1 Investor Presentation 104 Cover Page Interactive Data File (embedded in the cover page formatted in Inline XBRL) SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed by the undersigned thereunto duly authorized. S & T Bancorp, Inc. /s/ Mark Kochvar July 27, 2026 Mark Kochvar Senior Executive Vice President, Chief Financial Officer

S&T Bancorp, Inc. filed an 8-K on July 27, 2026 disclosing an investor presentation under Regulation FD, providing financial data and transparency to investors, analysts, and stakeholders through materials available on the company's website.

S&T Bancorp, Inc. has issued an investor presentation under Item 7.01 Regulation FD Disclosure. This presentation contains key financial data intended for use in meetings with investors, analysts, and other interested parties. The presentation is available on S&T's website and was attached as Exhibit 99.1 to the report. This disclosure aids in providing better transparency and understanding of the company's financial position to external parties. The date of this filing is July 27, 2026, and reflects recent communications to stakeholders.

S & T BANCORP, INC

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