Oaktree Specialty Lending Corporation, formerly Fifth Street Finance Corp., is a specialty finance company. The Company is a closed-end, non-diversified management investment company. The Company acts as a business development company (BDC). The Company's investment objective is to maximize its portfolio's total return by generating current income from its debt investments, and capital appreciation from its equity investments. The Company lends to and invests in small and mid-sized companies, primarily in connection with investments by private equity sponsors. The Company seeks to invest in companies in connection with private equity sponsors. The Company invests in sectors, such as healthcare services; Internet software and services; multi-sector holdings; advertising; airlines, and construction and engineering. Fifth Street Management LLC is the Company's investment advisor.