Gladstone Capital Corporation functions as a Business Development Company (BDC) primarily focused on the lower middle market in the United States. The firm engages in a variety of investment strategies, including providing growth capital, supporting add-on acquisitions, facilitating change-of-control transactions, executing buy-and-build models, and refinancing existing debt. It also makes private equity investments in the form of acquisitions, buyouts, recapitalizations, and refinancing.