INVESTOR CONTACT: Mark Kochvar S&T Bancorp, Inc. Chief Financial Officer 724.465.4826 mark.kochvar@stbank.com

FOR IMMEDIATE RELEASE

S&T Bancorp, Inc. Declares Dividend

INDIANA, Pa. - April 26, 2023 - The Board of Directors of S&T Bancorp, Inc. (S&T) (NASDAQ: STBA), the holding company for S&T Bank, approved a $0.32 per share cash dividend on April 26, 2023.This is an increase of $0.02, or 6.7 percent, compared to a cash dividend of $0.30 in the same period in the prior year. The annualized yield using the April 25, 2023 closing price of $26.62 is 4.8 percent. The dividend is payable May 25, 2023 to shareholders of record on May 11, 2023.

About S&T Bancorp, Inc. and S&T Bank

S&T Bancorp, Inc. is a $9.2 billion bank holding company that is headquartered in Indiana, Pennsylvania and trades on the NASDAQ Global Select Market under the symbol STBA. Its principal subsidiary, S&T Bank, was established in 1902 and operates in Pennsylvania and Ohio. S&T Bank was recently named by Forbes as a 2022 Best-in-State Bank. For more information visit stbancorp.com or stbank.com. Follow us on Facebook, Instagram and LinkedIn.