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May 13, 2025

Date of Report (date of earliest event reported)

S&T BANCORP, INC.

(800) 325-2265

Registrant's telephone number, including area code

(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:

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. ☐

On May 13, 2025, S&T Bancorp, Inc. ("S&T") held its 2025 Annual Meeting of Shareholders ("Annual Meeting"). A total of 38,370,213 shares of S&T's common stock were entitled to vote as of February 28, 2025, the record date for the Annual Meeting. There were 31,887,966 shares voted at the Annual Meeting, at which the shareholders were asked to vote on three proposals. Set forth below are the matters acted upon by the shareholders at the Annual Meeting, and the final voting results of each such proposal.

The 11 directors named in S&T's proxy statement were elected to serve a one-year term until the next annual meeting of shareholders and until their successors are elected and qualified.

The shareholders voted to ratify the selection of Ernst & Young LLP as S&T's independent registered public accounting firm for the fiscal year 2025. The results of the vote were as follows:

The shareholders voted to approve the non-binding, advisory proposal on the compensation of S&T's named executive officers. The results of the vote were as follows:

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.