X0203 3 2011-07-18 0 0000720002 MAINSOURCE FINANCIAL GROUP MSFG 0001286618 THAYER CHARLES J 2105 N. STATE RD 3 GREENSBURG IN 47240 1 0 0 0 Common Stock 4000 D Mr. Thayer was appointed to the Board of Directors of MainSource Financial Group at the Company's Board of Directors Meeting held on June 20, 2011, effective with the Board of Directors meeting held on July 18, 2011. As authorized by Power of Attorney. Charles J. Thayer 2011-07-28