Main Street Capital Investor Day Presentation Deck

■ Aggregate LMM Dividend Income Over Time As a result of our LMM equity strategy, dividend income across the LMM portfolio has grown over time and has proven to be a growing stream of recurring income for MAIN $32.7 As our LMM portfolio grows, continues to season and deleverage, we anticipate dividend income to continue provide long term growth to MAIN's income 2018 $ in millions Main Street Capital Corporation $34.7 2019 15.6% CAGR $27.8 2020 NYSE: MAIN MAINST $64.2 CAPITAL CORPORATION 2021 $58.2 2022 mainstcapital.com

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