X0306 4 2015-05-20 0000719220 S&T BANCORP INC STBA 0001221996 GIBSON JAMES THOMAS 800 PHILADELPHIA STREET INDIANA PA 15701 1 Common Stock 2015-05-20 4 A 0 1117 26.86 A 501117 D Common Stock 2015-05-20 4 A 0 168 26.86 A 501285 D Common Stock 4125 I Spouse The Registrant's Board of Directors awarded 1117 restricted shares of the Registrant's common stock to each non-employee director on the Board on May 20, 2015 (the "Grant Date"), with such shares vesting in full on May 19, 2016. The fair market value of the common stock was the ending share price of $26.86 per share on the Grant Date. On May 20, 2015, the Registrant's Board of Directors awarded a pro-rata portion of the 2014 annual equity award to new directors appointed on March 4, 2015. The fair market value of the common stock was the ending share price of $26.86 per share on the Grant Date. /s/ Timothy P. McKee, POA for James Thomas Gibson 2015-05-22