Main Street Capital Fixed Income Presentation Deck

Unique Investment Strategy MAIN's investment strategy differentiates MAIN from its competitors and provides highly attractive risk-adjusted returns Main Street Capital Corporation ● ● ● Lower Middle Market (LMM) Proprietary investments that are difficult for investors to access Companies with $10 million - $150 million of revenues and $3-$20 million of EBITDA Customized financing solutions which include a combination of first lien, senior secured debt and equity Large addressable market High cash yield from debt investments Dividend income, NAV growth and net realized gains from equity investments Middle Market Larger companies than LMM strategy, with EBITDA between $20 - $100 million First lien, senior secured debt investments Floating rate debt investments Large addressable market Can provide source of liquidity for MAIN as needed NYSE: MAIN MAIN ST CAPITAL CORPORATION ● Private Loans Companies that are similar in size to companies in LMM and Middle Market First lien, senior secured debt investments in privately held companies originated directly by MAIN or through strategic relationships with other investment funds Floating rate debt investments Proprietary investments that can be difficult for investors to access Investments with attractive risk-adjusted returns Asset Management Business Monetizing value of MAIN's intangible assets Significant contribution to net investment income Source of stable, recurring fee income Returns benefit MAIN stakeholders due to internally managed structure mainstcapital.com Page 6

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