Oaktree Specialty Lending Corporation is a business development company. The fund specializing in investments in middle market, bridge financing, first and second lien debt financing, unsecured and mezzanine loan, mezzanine debt, senior and junior secured debt, expansions, sponsor-led acquisitions, preferred equity, and management buyouts in small and mid-sized companies. It seeks to invest in education services, business services, retail and consumer, healthcare, manufacturing, food and restaurants, construction and engineering. The firm also seeks investment in media, advertising sectors, software, IT services, pharmaceuticals, biotechnology, real estate management and development, chemicals, machinery, and internet and direct marketing retail sectors.