Main Street Investor Presentation

Diversified Total Portfolio (as a Percentage of Cost) (1) MAINST CAPITAL CORPORATION Invested Capital by Transaction Type LBO/MBO 39% 12% 4% 45% Acquisition Growth Capital Recapitalization/ Refinancing Invested Capital by Geography (2) 22% 20% 19% 13% 26% (1) Excluding MAIN'S Other Portfolio investments and the External Investment Manager, as described in MAIN's public filings, which represent approximately 5% of the totall portfolio (2) Based upon portfolio company headquarters and excluding any MAIN investments headquartered outside the U.S., which represent approximately 2% of the total portfolio Main Street Capital Corporation NYSE: MAIN mainstcapital.com Page 21

View entire presentation