X0202 4 2007-05-17 0 0000720002 MAINSOURCE FINANCIAL GROUP MSFG 0001256237 BARRON WILLIAM G 726 HARVARD DRIVE OWENSBORO KY 42301 1 0 0 0 Common Stock 2007-05-17 4 P 0 2561 16.81 A 56152 D Common Stock 2007-05-17 4 P 0 2841 16.81 A 37875 I By Spouse Common Stock 47574 I By Trust A Common Stock 5164 I By Trust B Common Stock 231578 I By Family Trust Common Stock 133838 I By Barron Family Partnership Common Stock 3910 I FBO Brian Barron Includes 2,531 shares acquired on 01/16/07 through a 5% stock dividend paid by the Company, and 428 shares acquired on 03/15/07 under the Dividend Reinvestment Plan. Includes 1,655 shares acquired on 01/16/07 through a 5% stock dividend paid by the Company, and 276 shares acquired on 03/15/07 under the Dividend Reinvestment Plan. Includes 2,246 shares acquired on 01/16/07 through a 5% stock dividend paid by the Company, and 396 shares acquired on 03/15/07 under the Dividend Reinvestment Plan. Includes 245 shares acquired on 01/16/07 through a 5% stock dividend paid by the Company. Includes 11,027 shares acquired on 01/16/07 through a 5% stock dividend paid by the Company. Includes 6,373 shares acquired on 01/16/07 through a 5% stock dividend paid by the Company. Includes 184 shares acquired on 01/16/07 through a 5% stock dividend paid by the Company and 32 shares acquired on 03/15/07 under the Dividend Reinvestment Plan. William G. Barron 2007-05-17