Health score, competitive moat, risk signals, and key metrics at a glance.
Main Street Capital Corporation is a business development company and a small business investment company specializing in direct and indirect investments. In direct investments, the firm specializes in private equity capital to lower middle market companies. The firm specializes in recapitalizations, loan, growth capital, mezzanine debt, corporate carveouts, family estate planning, management buyouts, refinancing, private loan, private credit solutions, senior secured term debt, unintranche term debt, subordinated debt, preferred equity, common equity, minimal or no fixed amortization, split lien term debt, industry consolidation, mature, later stage and emerging growth. The firm makes both control and non-control equity investments. The firm also provides debt capital to middle market companies for strategic acquisitions, management buyouts, growth financings, majority and minority recapitalizations, and refinancing. The firm also makes equity co-investments. The firm provides debt financing solutions for acquisitions, recapitalizations, and refinancing to middle market companies. The firm provides private debt and private equity capital to lower middle market companies and debt capital to middle market companies. The firm seeks to partner with entrepreneurs, business owners and management teams and generally provides "one stop" financing alternatives within its lower middle market portfolio. It prefers to invest in air freight and logistics, auto components, building products, chemicals, commercial services, computers, construction and engineering, consumer finance, consumer services, electronic equipment, energy equipment and services, financial services, health care equipment, health care providers, hotels, restaurants, and leisure, internet software and services, IT Services, machinery, oil, gas and consumable fuels, paper and forest products, professional and industrial services, manufacturing, road and rail, software, specialty retail, telecommunication, consumer discretionary, energy, materials, concrete, plumbing pipes, electrical component, heavy electrical equipment, media, utilities, technology, and transportation. The firm invests in Southwest of the United States of America. The firm typically invests in business services, commercial and professional services, communication services, consumer discretionary, consumer staples, lower middle market companies ranging between $5 million and $125 million in equity investment with annual revenues between $10 million and $150 million and EBITDA in ranging between $3 million and $20 million. The firm typically prefers to invest in the range of $5 million and $150 million per transaction in debt investment value but holds the ability to lead debt financings up to $250 million. For credit solutions, the firm invests between $10 million and $150 million with an EBITDA in the range of $7.5 million and $50 million. The firm loan portfolio companies generally have annual revenues between $25 million and $500 million. The firm's middle market debt investments are made in businesses that are generally larger in size than its lower middle market portfolio companies. It takes 5 percent minority and up to 50 percent majority equity investments. Main Street Capital Corporation was founded in 2007 and is based in Houston, Texas with an additional offices in Chicago, United States and Chojnów, Poland.
Competitive analysis based on 15 quarters of fundamental data
Operating margins are stable at ~64.5%, suggesting durable pricing power and cost discipline.
ROE averages 17.3% but has fluctuated — the competitive advantage may be cyclical or emerging.
Data-driven red flags and warnings across 15 quarters
Margins are stable or improving at ~64.0% — no sign of cost or pricing stress.
Free cash flow has been negative in 4 of the last 8 quarters — earnings are not translating to cash.
D/E ratio is 0.8 — conservative capital structure with low financial risk.
Revenue is stable or growing over recent quarters — demand appears durable.
4 of the last 8 quarters had negative FCF — inconsistent cash generation raises sustainability concerns.
Shares outstanding increased 5.2% — significant dilution, likely from stock compensation or capital raises.
as of March 2026
Revenue, EBITDA, operating income, net income, EPS, and shares
Gross, EBITDA, operating, and net margin trends
P/E, P/S, P/B, EV/EBITDA, FCF yield, and earnings yield
Total assets, cash, debt, book value, and leverage
Operating cash flow, free cash flow, FCF margin, and earnings quality
Only 4 of the last 8 quarters had positive FCF — the business may require external capital to sustain operations.
TTM revenue has grown consistently (7 of 7 quarters up), with ~10.3% growth over the period. Strong demand durability.