X0306 4 2021-08-05 0000719220 S&T BANCORP INC STBA 0001157911 GRUBE JEFFREY D 800 PHILADELPHIA STREET INDIANA PA 15701 1 Common Stock 2021-08-05 4 A 0 1465 29.34 A 33446.945 D Common Stock 3370 I Grube Family 2018 Irrevocable Trust The Registrant granted the annual Director Award effective on the date that the Form S-8 Registration Statement for the S&T Bancorp, Inc. 2021 Incentive Stock Plan was filed with the Securities Exchange Commission and under the terms of the Restricted Stock Award Agreement between the Company and the Director. The vesting date of the award is May 16, 2022. /s/ Timothy P. McKee P.O.A. for Jeffrey D. Grube 2021-08-06