X0306 4 2013-05-01 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 2013-03-15 5 G 0 E 860 0 D 123921 I By Family Partnership Common Stock 2013-04-09 5 G 0 E 730 0 D 254468 I By Family Trust Common Stock 2013-05-01 4 M 0 5000 5.40 A 54522 D Common Stock 2013-05-01 4 A 0 2900 0 A 57422 D Common Stock 45644 I By Spouse Common Stock 77487 I By Trust A Common Stock 8310 I By Trust B Common Stock 4832 I FBO Son Common Stock 10955 I FBO Daughter Common Stock 303881 I By Irrevocable Trust Stock Option (Right to Buy) 5.40 2013-05-01 4 M 0 5000 0 D 2009-02-23 2019-02-22 Common Stock 5000 0 D Total includes common shares acquired under the MainSource Dividend Reinvestment Plan between December 31, 2012 and March 31, 2013. 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 2013-05-02