0000719220-09-000021 8-K 1 20091116 5.02 20091120 20091120 S&T BANCORP INC 0000719220 6022 251434426 PA 1231 8-K 34 000-12508 091199307 800 PHILADELPHIA STREET PO BOX 190 INDIANA PA 15701 7244651466 800 PHILADELPHIA STREET PO BOX 190 INDIANA PA 15701 8-K 1 st8k11192009.htm FORM 8-K DATED NOVEMBER 16, 2009