Fidus Investment Corporation, an externally managed, closed-end, and non-diversified management investment company, together with its subsidiaries, provides customized mezzanine debt and equity financing solutions primarily to lower middle-market companies in the United States. It invests in mezzanine debt that includes senior subordinated notes and junior secured loans; senior secured loans; and equity securities consisting of direct minority equity investment in common or preferred stock of a portfolio company, or warrants to buy a minority equity interest in a portfolio company in connection with a debt investment. The company also provides managerial assistance to its portfolio companies. It primarily invests in the business services, industrial products and services, value-added distribution, healthcare products and services, consumer products and services, niche manufacturing, defense and aerospace, transportation and logistics, and government information and technology services industries. The company was founded in 2007 and is headquartered in Evanston, Illinois.