Summary of MAINSOURCE FINANCIAL GROUP

Item 7.01 Regulation FD Disclosure

On August 28, 2012, MainSource Financial Group, Inc.'s wholly owned bank subsidiary, MainSource Bank ("MainSource Bank"), announced that it entered into a Branch Purchase and Assumption Agreement (the "Agreement") with American Founders Bank, Inc. ("AFB") to purchase an AFB branch in Shelbyville, Kentucky. The purchase includes the existing branch location at 1734 Midland Trail in Shelbyville, Kentucky, as well as approximately $37 million in loans and $37 million in deposits. Subject to the receipt of regulatory approval and the satisfaction of customary closing conditions, the transaction is expected to close during the fourth quarter of 2012.

Attached hereto as Exhibit 99.1 is a press release issued by MainSource Bank announcing the branch purchase which is incorporated herein by reference pursuant to General Instruction F to Form 8-K.

Forward-Looking Statements

Except for historical information contained herein, the discussion in this Report may include certain forward looking statements based upon management expectations. Actual results and experience could differ materially from the anticipated results or other expectations expressed in the Company's forward-looking statements. Factors which could cause future results to differ from these expectations include the following: general economic conditions; legislative and regulatory initiatives; monetary and fiscal policies of the federal government; deposit flows; the cost of funds; general market rates of interest; interest rates on competing investments; demand for loan products; demand for financial services; changes in accounting policies or guidelines; changes in the quality or composition of the Company's loan and investment portfolios; the Company's ability to integrate acquisitions; the impact of our continuing acquisition strategy; and other factors, including various "risk factors" as set forth in our most recent annual report on Form 10-K and in other reports we file from time to time with the Securities and Exchange Commission. These reports are available publicly on the SEC website, www.sec.gov, and on the Company's website, www.mainsourcefinancial.com.