Founded in 1990, Apollo Investment Corporation is a leading provider of subordinated debt and equity capital to middle-market companies. The firm generates both current income and capital appreciation through debt and equity investments. Apollo invests primarily in middle-market companies in the form of mezzanine and senior secured loans, as well as by making direct equity investments in such companies. The firm invests across all sectors with a target investment size of $20 to $250 million. Apollo participates in all levels of capital structure from secured senior debt to equity; however, the firm primarily focuses on mezzanine investments with stated maturities of 5 to 10 years.