0000719220-09-000017 8-K 2 20090921 8.01 20090922 20090922 S&T BANCORP INC 0000719220 6022 251434426 PA 1231 8-K 34 000-12508 091080006 800 PHILADELPHIA STREET PO BOX 190 INDIANA PA 15701 7244651466 800 PHILADELPHIA STREET PO BOX 190 INDIANA PA 15701 8-K 1 st8k9212009.htm FORM 8-K DATED SEPTEMBER 21, 2009 EX-99 2 press92109.htm PRESS RELEASE