X0303 4 2011-05-20 0 0000720002 MAINSOURCE FINANCIAL GROUP MSFG 0001256237 BARRON WILLIAM G 2105 N. STATE RD 3-BYPASS GREENSBURG IN 47240 1 0 0 0 Common Stock 2011-05-20 4 P 0 1870 8.02 A 42255 D Common Stock 2011-05-20 4 P 0 1820 8.02 A 45344 I By Spouse Common Stock 76730 I By Trust A Common Stock 8311 I By Trust B Common Stock 252616 I By Family Trust Common Stock 134978 I By Family Partnership Common Stock 4764 I FBO Son Common Stock 10788 I FBO Daughter Common Stock 303881 I By Irrevocable Trust Total includes 35 shares acquired under the MainSource Dividend Reinvestment Plan on 03/21/2011. Total includes 40 shares acquired under the MainSource Dividend Reinvestment Plan on 03/21/2011. Total includes 58 shares acquired under the MainSource Dividend Reinvestment Plan on 03/21/2011. Total includes 279 shares acquired under the MainSource Dividend Reinvestment Plan on 03/21/2011. Total includes 149 shares acquired under the MainSource Dividend Reinvestment Plan on 03/21/2011. Total includes 5 shares acquired under the MainSource Dividend Reinvestment Plan on 03/21/2011. Total includes 11 shares acquired under the MainSource Dividend Reinvestment Plan on 03/21/2011. The reporting person is a co-trustee of the trust and has the right, following settlor's death, to request interest and principal from the trust. The reporting person disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein. As authorized by Power of Attorney. William G. Barron 2011-05-23