Golub Capital BDC Inc is an externally managed, closed-end, non-diversified management investment company. Its investment objective is to generate current income and capital appreciation by investing in senior secured and one-stop loans inUnited States middle-market companies. It also invests in the second lien and subordinated loans, warrants, and minority equity securities in United States middle-market companies. The company generally invests in securities that have beenrated below investment grade by independent rating agencies or that would be rated below investment grade if they were rated.