X0306 4 2018-02-06 0 0000720002 MAINSOURCE FINANCIAL GROUP MSFG 0001519621 HARRISON CHRIS M 2105 NORTH STATED ROAD 3 BYPASS GREENSBURG IN 47240 0 1 0 0 EVP, Consumer Banking subsidiary, MainSource Bank Common Stock 2018-02-06 4 M 0 1593 13.67 A 10605 D Common Stock 2018-02-06 4 M 0 2513 16.08 A 13118 D Common Stock 2018-02-06 4 S 0 4106 39.71 D 9012 D Common Stock 7143 I By 401-k Employee Stock Option (Right to Buy) 13.67 2013-04-10 4 M 0 1593 0 D 2023-04-10 Common Stock 1593 0 D Employee Stock Option (Right to Buy) 16.08 2014-02-07 4 M 0 2513 0 D 2024-02-07 Common Stock 2513 0 D Total reported includes 584 shares acquired through the reinvestment of cash dividends between 02/27/2017 and 02/06/2018. This stock option was 10% vested on 12/31/2013, 30% vested on 12/31/2014, 60% vested on 12/31/2015, and 100% on 12/31/2016. This stock option was 10% vested on 12/31/2014, 30% vested on 12/31/2015, 60% vested on 12/31/2016, and 100% on 12/31/2017. As authorized by Power of Attorney. /s/ Denise Manus, attorney-in-fact 2018-02-08