Main Street Capital Investor Presentation Deck

Diversified LMM Portfolio (as a Percentage of Cost) Invested Capital by Transaction Type LBO/MBO 27% Acquisition 6% 3% Growth Capital (1) Based upon portfolio company headquarters Main Street Capital Corporation Recapitalization/ Refinancing 64% Invested Capital by Geography (¹) NYSE: MAIN 28% 22% 26% MAIN ST CAPITAL CORPORATION 14% 10% mainstcapital.com Page 26

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