X0303 4 2009-06-10 0 0000720002 MAINSOURCE FINANCIAL GROUP MSFG 0001256237 BARRON WILLIAM G 726 HARVARD DRIVE OWENSBORO KY 42301 1 0 0 0 Common Stock 2009-06-10 4 P 0 2143 7.86 A 57306 D Common Stock 2009-06-10 4 P 0 2082 7.86 A 42697 I By Spouse Common Stock 73509 I By Trust A Common Stock 5163 I By Trust B common StockC 231578 I By Family Trust Common Stock 133838 I By Family Partnership Common Stock 4656 I FBO Son Common Stock 10556 I FBO Daughter Common Stock 303881 I By Irrevocable Trust Includes 974 shares acquired on 3/16/09 under the MainSource Dividend Reinvestment Plan. Includes 707 shares acquired on 3/16/09 under the MainSource Dividend Reinvestment Plan. Includes 1016 shares acquired on 3/16/09 under the MainSource Dividend Reinvestment Plan. Includes 91 shares acquired on 3/16/09 under the MainSource Dividend Reinvestment Plan. Includes 208 shares acquired on 3/16/09 under the MainSource Dividend Reinvestment Plan. 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. William G. Barron 2009-06-12