Main Street Capital Corporation is a business development company specializing in equity, equity related, and debt investments in small and lower middle market companies. The firm focuses on investments in warrants, PIK (Payment in Kind) interest, convertible securities, junior secured or unsecured, subordinated loans, private equity, venture debt, mezzanine investments, mature, mid venture, industry consolidation, later stage, late venture, emerging growth, management buyouts, ownership transitions, recapitalizations, strategic acquisitions, business expansion, growth financings, and other growth initiatives primarily for later stage businesses. It does not seek to invest in start-up companies or companies with speculative business plans. It seeks to invest in traditional or basic businesses. The firm primarily invests in companies based in the Southern, South Central, and Southwestern regions of the United States but also considers other domestic investment opportunities. It invests between $2 million and $15 million in companies with revenues between $10 million and $100 million, enterprise values between $3 million and $50 million, and EBITDA between $1 million and $10 million. The firm seeks to charge a fixed interest rate between 12 percent and 14 percent, payable in cash, in case of its mezzanine loan investments. The firm typically invests in the form of term debt with equity participation and/or direct equity investments. It prefers to maintain fully diluted equity positions in its portfolio companies of 5 percent to 50 percent, and may have controlling interests in some instances. The firm also co-invests with other investment firms. It seeks to exit its debt investments through the repayment of the investment from internally generated cash flow and/or refinancing within a period of three to seven years. Main Street Capital Corporation was founded in 1997 and is based at Houston, Texas.

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