Main Street Investor Presentation

Diversified Private Loan & Middle Market Investments (as a Percentage of Cost) Invested Capital by Transaction Type Invested Capital by Geography (1) MAINST CAPITAL CORPORATION LBO/MBO 39% 40% Recapitalization/ Refinancing 2% 19% Growth Acquisition 21% 21% 22% 15% 21% (1) Based upon portfolio company headquarters and excluding any MAIN investments headquartered outside the U.S., which represent approximately 3% of the combined Private Loan and Middle Market portfolios Main Street Capital Corporation NYSE: MAIN mainstcapital.com Page 31

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