Golub Capital BDC is an externally managed, closed-end, non-diversified management investment company. Co. makes investments primarily in one stop (a loan that combines characteristics of first lien senior secured loans and second lien or subordinated loans) and other senior secured loans of middle-market companies that are, in most cases, sponsored by private equity firms. Co.'s investment objective is to generate current income and capital appreciation by investing primarily in one stop and other senior secured loans of U.S. middle-market companies.