Golub Capital GBDC Offering costs, partnership interests

Equity Distribution Agreement: On October 6, 2023, the Company entered into an equity distribution agreement, which was most recently amended on May 16, 2025, (the “2023 Equity Distribution Agreement”), by and among the Company, the Investment Adviser, the Administrator, and Keefe, Bruyette & Woods, Inc. and Regions Securities LLC (the “Placement Agents”), in connection with the sale by the Company of shares of its common stock, having an aggregate offering price of up to $288,043, in an “at the market offering,” in amounts and at times to be determined by the Company. Through September 30, 2025, the Company has issued 2,408,940 of shares of its common stock for net proceeds to the Company of $38,043 under the 2023 Equity Distribution Agreement. Actual sales, if any, will depend on a variety of factors to be determined by the Company from time to time, including, among others, market conditions and the market price of the Company’s common stock. The 2023 Equity Distribution Agreement provides that the Company can offer and sell shares of its common stock from time to time through, or to, the Placement Agents. Sales of the shares can be made in negotiated transactions or transactions that are deemed to be “at the market,” as defined in Rule 415 under the Securities Act of 1933, as amended, including sales made directly on The Nasdaq Global Select Market or any similar securities exchange or sales made to or through a market maker other than on a securities exchange, at prices related to the prevailing market prices or at negotiated prices. Pursuant to the terms of the 2023 Equity Distribution Agreement, the Placement Agents receive a commission from the Company of up to 1.50% of the gross sales price of any shares sold through the Placement Agents under the 2023 Equity Distribution Agreement. Offering costs for the 2023 Equity Distribution Agreement are charged against the proceeds from equity offerings when proceeds are received. During the year ended September 30, 2025, the Company issued 2,408,940 shares of common stock under the 2023 Equity Distribution Agreement. During the years ended September 30, 2024 and 2023, the Company did not issue any shares of common stock under the 2023 Equity Distribution Agreements.