New Mountain Finance Corporation operates as a closed-end, non-diversified management investment company. The company, through its interest in New Mountain Finance Holdings, L.L.C., invests in debt securities at various levels of the capital structure, including first and second lien debt, notes, bonds, and mezzanine securities; in equity interests, such as preferred stock, common stock, warrants, or options received in connection with its debt investments; and directly in the equity of private companies. It invests in various industries that include software, healthcare services and products, education, business services, federal services, consumer and information services, logistics, industrial services, healthcare information technology, media, specialty chemicals and materials, power generation, information technology, and telecommunication. New Mountain Finance Corporation, formerly known as New Mountain Guardian Corporation, was incorporated in 2010 and is based in New York, New York.