8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of report (Date of earliest event reported): June 13, 2025

GOLUB CAPITAL BDC, INC.

(Exact name of Registrant as Specified in Its Charter)

__ 200 Park Avenue, 25th Floor, New York, NY 10166_ _

(Address of Principal Executive Offices)          (Zip Code)

Registrant’s telephone number, including area code: (212) 750-6060

____ ____

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

| ☐ | Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) | | --- | --- || ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) | | --- | --- || ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) | | --- | --- || ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) | | --- | --- |

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b- 2 of the Securities Exchange Act of 1934.

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 1.01. Entry into a Material Definitive Agreement.

On June 13, 2025, Golub Capital BDC, Inc. (the “Company”) entered into an amendment (the “Amendment”) to the amended and restated revolving loan agreement dated as of June 21, 2019, governing the unsecured revolving credit facility (as amended, the “GC Advisors Revolver”) with GC Advisors LLC, the Company’s investment adviser, as the lender.

The Amendment (i) increases the borrowing capacity under the GC Advisors Revolver from $200.0 million to $300.0 million, (ii) changes the rate that interest accrues on each loan from the short-term applicable federal rate to the mid-term applicable federal rate and (iii) extends the maturity date to June 13, 2032. The other material terms of the GC Advisors Revolver were unchanged.

The description above is only a summary of the material provisions of the Amendment and is qualified in its entirety by reference to a copy of the Amendment, which is filed as Exhibit 10.1 to this current report on Form 8-K.

Item 2.03. Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of Registrant.

The information contained in Item 1.01 of this current report on Form 8-K is incorporated by reference in this Item 2.03.

Item 9.01. Financial Statements and Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, Golub Capital BDC, Inc. has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

gbdc-fourthamendmenttoar

FOURTH AMENDMENT TO AMENDED AND RESTATED REVOLVING LOAN AGREEMENT This FOURTH AMENDMENT (the “Amendment”) to the Amended and Restated Revolving Loan Agreement, (as amended, the “Agreement”), initially entered into as of June 21, 2019, by and between Golub Capital BDC, Inc. (the “Borrower”) and GC Advisors LLC (the “Lender”), is hereby made as of June 13, 2025. Capitalized terms used but not otherwise defined herein shall have the meaning ascribed to them in the Agreement. RECITALS WHEREAS, Borrower and Lender desire to amend the Agreement to increase the Commitment, change the rate at which interest accrues on each Loan and extend the Maturity Date; NOW, THEREFORE, in consideration of the promises and the mutual agreements contained herein, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, Borrower and Lender hereby agree as follows: 1. Amendment to the Commitment. (a) The definition of “Commitment” in Section 1 of the Agreement is hereby amended by deleting the amount “$200,000,000” and inserting the amount “$300,000,000” in lieu thereof. 2. Amendment to Definitions. (a) The definition of “AFR” in Section 17 of the Agreement is hereby amended and restated as follows: “AFR” shall mean the mid-term applicable federal rate for quarterly compounding, as described under Section 1274(d) of the Internal Revenue Code of 1986, as amended. (b) The definition of “Maturity Date” in Section 17 of the Agreement is hereby amended and restated as follows: “Maturity Date” shall mean June 13, 2032. 4. Full Force and Effect. Other than as specifically set forth in this Amendment, all terms and conditions of the Agreement shall remain in full force and effect. 5. Governing Law. This Amendment shall be governed by and construed in accordance with the laws of the State of New York. 6. Counterparts. This Amendment may be signed in two counterparts, each of which shall constitute an original but both of which when taken together shall constitute but one agreement. [Signature page follows]

[Signature Page to Fourth Amendment to Amended and Restated Revolving Loan Agreement] IN WITNESS WHEREOF, the Borrower and Lender have caused this Amendment to be duly executed by their duly authorized officers, all as of the date first set forth above. BORROWER: GOLUB CAPITAL BDC, INC. By: /s/ David B. Golub____________________________ Name: David B. Golub Title: Chief Executive Officer LENDER: GC ADVISORS LLC By: /s/ David B. Golub______________________________ Name: David B. Golub Title: President