X0306 4 2018-03-16 0000719220 S&T BANCORP INC STBA 0001493553 HABERFIELD PATRICK J 800 PHILADELPHIA ST. INDIANA PA 15701 1 Sr. Executive Vice President Common Stock 2018-03-16 4 D 0 962 0 D 13377.761 D Common Stock 2018-04-19 4 F 0 812 42.70 D 14992.761 D Forfeiture of performance shares from the 2015 Long-Term Incentive Plan. Performance shares vested at 40%, between Threshold and Target level. Shares withheld upon vesting of Restricted Stock for payment of tax liability. /s/ Timothy P. McKee POA for Patrick J. Haberfield 2018-04-23