Material Event Form 8 K

On November 22, 2024, Gladstone Capital Corporation, a Maryland corporation (the "Company"), filed a prospectus supplement (the "Prospectus Supplement") to the prospectus, dated January 17, 2024, covering the offer and sale of up to 5,561,275 shares of 6.25% Series A Cumulative Redeemable Preferred Stock of the Company, par value $0.001 per share, pursuant to the dealer manager agreement, dated May 31, 2023 (the "Dealer Manager Agreement"), by and between the Company and Gladstone Securities, LLC. A copy of the Dealer Manager Agreement was previously filed as Exhibit 1.1 to the Company's Current Report on Form 8-Kwith the Securities and Exchange Commission on June 1, 2023.

The Company is filing this Current Report on Form 8-Kto provide the legal opinion of Venable LLP regarding the legality of the securities covered by the Prospectus Supplement, which opinion is attached hereto as Exhibit 5.1.