Sixth Street Specialty Lending, Inc. (NYSE: TSLX) is a business development company. The fund provides senior secured loans (first-lien, second-lien, and unitranche), unsecured loans, mezzanine debt, and investments in corporate bonds and equity securities and structured products, non-control structured equity, and common equity with a focus on co-investments for organic growth, acquisitions, market or product expansion, restructuring initiatives, recapitalizations, growth capital, buyout, and refinancing.