S&T Bancorp annual meeting elects directors; board creates Technology & Operations Committee

Proposal No. 2 Ratification of the Selection of Independent Registered Public Accounting Firm for Fiscal Year 2026 The shareholders voted to ratify the selection of Ernst & Young LLP as S&T's independent registered public accounting firm for the fiscal year 2026. The results of the vote were as follows: FOR AGAINST WITHHELD 30,178,173 162,408 36,213

Proposal No. 3 Advisory Vote to Approve Compensation of S&T's Named Executive Officers 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: FOR AGAINST WITHHELD BROKER NON-VOTES 25,880,791 367,554 194,588 3,933,861

On May 12, 2026, S&T Bancorp, Inc. ("S&T") held its 2026 Annual Meeting of Shareholders ("Annual Meeting"). A total of 36,548,632 shares of S&T's common stock were entitled to vote as of February 27, 2026, the record date for the Annual Meeting. There were 30,376,794 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. Proposal No. 1 Election of Directors 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.