Main Street Capital Corporation (MSCC) is a principal investment firm primarily focused on providing customized debt and equity financing to lower middle market (LMM) companies, which it generally define as companies with annual revenues between $10 million and $100 million that operate in diverse industries. Main Street's LMM portfolio investments principally consist of secured debt, equity warrants and direct equity investments in privately held LMM companies. Main Street's privately placed portfolio investments consist of primarily debt investments in middle market businesses that are generally larger in size than the portfolio companies within the LMM portfolio. Its LMM portfolio investments range in size from $5 million to $25 million. As of December 31, 2011, it had debt and equity investments in 54 LMM portfolio companies. On February 29, 2012, MSCC completed the exit of its debt investment and a portion of its equity investments in Drilling Info, Inc., (Drilling Info).