Gladstone Capital Corporation is an externally managed closed end non diversified management investment company that has elected to be treated as a business development company under the 1940 Act and as a regulated investment company under the Internal Revenue Code. The company was incorporated under Maryland law in 2001 and its common stock trades on the Nasdaq Global Select Market under the ticker GLAD. Gladstone Capital's investment adviser is Gladstone Management LLC an affiliate that also provides advisory services to other publicly traded affiliates in the Gladstone family of funds. The administrator is Gladstone Administration LLC which handles back office functions. The firm's core activity is to invest in debt and equity securities of established private businesses located in the United States that it believes will generate steady cash flow and long term appreciation.

Revenue is derived mainly from interest payments on the debt securities the firm holds and from dividends and capital gains on its equity investments. The company originates loans that are typically structured as senior secured first lien or second lien instruments and may include features such as payment in kind interest success fees or warrants. Interest is usually paid monthly or quarterly and the principal is due at maturity. Equity holdings may consist of common stock preferred stock limited liability interests or warrants and can generate returns when a portfolio company is sold recapitalized or undergoes a change of control. In addition Gladstone Capital receives fees for loan servicing and advisory activities that are credited against its base management fee under the advisory agreement. The firm also earns incidental income from original issue discount and payment in kind interest which are included in its taxable income.

Gladstone Capital competes with other business development companies private credit funds and traditional banks that provide financing to lower middle market companies. Many competitors are larger and have access to cheaper capital but the firm differentiates itself through the experience of its investment team which includes professionals with decades of history in middle market investing and leveraged buyout markets. The adviser's investment committee comprises individuals with extensive backgrounds in the sector and they devote significant time to managing the portfolio. The company benefits from a broad network of relationships with private equity sponsors commercial banks investment bankers and business brokers that helps it source proprietary deal flow. Unlike private equity funds with finite lives Gladstone Capital has a perpetual corporate structure allowing it to take a long term view of investments without pressure to exit quickly. The firm also emphasizes a disciplined value and income approach that focuses on preserving capital while seeking current income and upside potential. Its ability to invest across the capital structure from senior debt to equity and to tailor transaction structures gives it flexibility in structuring deals that meet the specific needs of borrowers. Furthermore an exemptive order from the SEC permits co investment with its affiliated funds which expands the amount of capital it can deploy while adhering to allocation rules.

The firm's capital is allocated to privately held companies that operate across a variety of sectors including healthcare education manufacturing services consumer products and others. As of the end of fiscal year 2025 the portfolio consisted of investments in fifty five companies located in twenty two states and spanning sixteen different industries. The largest industry concentrations were in healthcare education and childcare diversified conglomerate manufacturing and diversified conglomerate service. Borrowers typically have earnings before interest taxes depreciation and amortization in the range of three million to twenty five million dollars and are considered too small for the largest capital market participants but large enough to generate predictable cash flows. Gladstone Capital does not disclose the names of individual portfolio companies in its public reports but it states that its investments are made in established private businesses that demonstrate strong market positions and experienced management teams.