Main Street Investor Presentation

Lower Middle Market (LMM) Investment Strategy LMM investment strategy differentiates MAIN from its competitors and provides attractive risk- adjusted returns Investment Objectives MAINST CAPITAL CORPORATION High cash yield from secured debt investments (10.9% weighted- average cash coupon as of June 30, 2020); plus Dividend income and periodic capital gains from equity investments Investments are structured for (i) protection of capital, (ii) high recurring income and (iii) meaningful capital gain opportunity • Focus on self-sponsored, "one stop" financing opportunities Partner with business owners and entrepreneurs Recapitalization, buyout, growth and acquisition capital • Extensive network of grass roots referral sources Strong and growing "Main Street" brand recognition/reputation Provide customized financing solutions Investments have low correlation to the broader debt and equity markets and attractive risk-adjusted returns Main Street Capital Corporation NYSE: MAIN mainstcapital.com Page 9

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