Main Street Investor Presentation

LMM Portfolio by Industry (as a Percentage of Cost) MAINST CAPITAL CORPORATION ■Machinery, 10% Energy Equipment & Services, 8% Food Products, 6% Leisure Equipment & Products, 5% Internet Software & Services, 4% Hotels, Restaurants & Leisure, 4% ■Media, 3% ■Distributors, 3% ■Diversified Telecommunication Services, 2% Specialty Retail, 2% ■Diversified Financial Services, 2% Electrical Equipment, 1% ■Professional Services, 10% ■ Electronic Equipment, Instruments & Components, 7% ■Construction & Engineering, 6% ■Software, 5% ■Containers & Packaging, 4% ■Commercial Services & Supplies, 4% ■Computers & Peripherals, 3% ■Diversified Consumer Services, 2% ■ Building Products, 2% ■IT Services, 2% ■Health Care Providers & Services, 1% ■ Other, 4% Main Street Capital Corporation NYSE: MAIN mainstcapital.com Page 24

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