Main Street Capital Announces 7.7% Dividend Increase

Main Street Capital Corporation

announced today that its Board of Directors declared monthly dividends of $0.14 per share for each of April, May and June 2012. These monthly dividends, which will be payable pursuant to the table below, equal a total of $0.42 per share for the second quarter of 2012. The second quarter 2012 dividends represent a 7.7% increase from the dividends declared for the second quarter of 2011 and a 3.7% increase compared to the first quarter of 2012. Including the dividends declared for the second quarter of 2012, Main Street will have paid $7.14 per share in cumulative dividends since its October 2007 initial public offering.