Main Street Investor Presentation

Diversified LMM Portfolio (as a Percentage of Cost) Invested Capital by Transaction Type Invested Capital by Geography (1) MAINST CAPITAL CORPORATION LBO/MBO Acquisition Recapitalization/ Refinancing 23% 19% 14% 38% 52% 4% 6% (1) Based upon portfolio company headquarters Main Street Capital Corporation Growth Capital 11% 33% NYSE: MAIN mainstcapital.com Page 25

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