S&T Bancorp shareholders elect 11 directors, ratify EY, approve exec comp

Proposal No. 1 Election of Directors The 11 directors named in the Company'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. FOR WITHHELD BROKER NON-VOTES Lewis W. Adkins, Jr. 26,255,179 1,453,412 4,069,546 David G. Antolik 26,446,626 1,261,965 4,069,546 Peter R. Barsz 26,442,633 1,265,958 4,069,546 Christina A. Cassotis 27,193,015 515,576 4,069,546 Michael J. Donnelly 26,999,543 709,048 4,069,546 Jeffrey D. Grube 26,931,655 776,936 4,069,546 William J. Hieb 26,878,304 830,287 4,069,546 Christopher J. McComish 26,902,703 805,888 4,069,546 Frank J. Palermo, Jr. 26,562,523 1,146,068 4,069,546 Christine J. Toretti 26,066,193 1,642,398 4,069,546 Steven J. Weingarten 22,617,759 5,090,832 4,069,546

Proposal No. 3 Advisory Vote on S&T's Executive Compensation The shareholders voted to approve the non-binding, advisory proposal on the compensation of the Company's named executive officers. The results of the vote were as follows: FOR AGAINST ABSTAIN BROKER NON-VOTES 26,633,530 858,151 216,910 4,069,546

Proposal No. 2 Ratification of the Selection of Independent Registered Public Accounting Firm for Fiscal Year 2023 The shareholders voted to ratify the selection of Ernst & Young LLP as the Company's independent registered public accounting firm for the fiscal year 2023. The results of the vote were as follows: FOR AGAINST ABSTAIN 31,711,819 37,054 29,264