Main Street Investor Presentation

Private Loan & Middle Market Portfolios by Industry (as a Percentage of Cost) MAINST CAPITAL CORPORATION Aerospace & Defense, 9% Commercial Services & Supplies, 7% ■IT Services, 6% ■Machinery, 5% ■Internet Software & Services, 5% Hotels, Restaurants & Leisure, 4% ■Construction & Engineering, 4% ■Energy Equipment & Services, 2% ■Diversified Financial Services, 2% Food & Staples Retailing. 2% Transportation Infrastructure, 2% Internet & Catalog Retail, 2% ■Textiles, Apparel & Luxury Goods, 1% Health Care Providers & Services, 8% Communications Equipment, 6% ■Diversified Telecommunication Services, 5% ■ Oil, Gas & Consumable Fuels, 5% ■ Media, 5% ■Specialty Retail, 4% ■Leisure Equipment & Products, 3% ■Trading Companies & Distributors, 2% ■Distributors, 2% ■ Software, 2% ■Chemicals, 2% Professional Services, 1% ■ Other, 4% Main Street Capital Corporation NYSE: MAIN mainstcapital.com Page 30

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