Main Street Investor Presentation

MAINST CAPITAL CORPORATION LMM Investment Opportunity MAIN targets LMM investments in established, profitable companies Characteristics of LMM provide beneficial risk- reward investment opportunities Large and critical portion of U.S. economy 175,000+ domestic LMM businesses(1) LMM is under-served from a capital perspective and less competitive Inefficient asset class generates pricing inefficiencies Typical entry enterprise values between 4.5X-6.5X EBITDA Typical entry leverage multiples between 2.0X-4.0X EBITDAto MAIN debt investment Partnerrelationship with the management teams of our portfolio companies vs a "commoditized vendor of capital" (1) Source: U.S. Census 2012 - U.S. Data Table by Enterprise Receipt Size; 2012 County Business Patterns and 2012 Economic Census; includes Number of Firms with Enterprise Receipt Size between $10,000,000 and $99,999,999 Main Street Capital Corporation NYSE: MAIN mainstcapital.com Page 10

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