GOLUB CAPITAL BDC, Inc.

For the period ended Jun 30, 2026. Filed Aug 3, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2026 · Filed Aug 3, 2026

GBDC$12.70-0.3%Stored close · as of Nov 9, 2026

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Contents

Item 6. Exhibits

EXHIBIT INDEX

Number	Description
10.1	Underwriting Agreement, dated May 19, 2026, by and among Golub Capital BDC, Inc., GC Advisors LLC, Golub Capital LLC, and Wells Fargo Securities, LLC, J.P. Morgan Securities LLC, Santander US Capital Markets LLC, SMBC Nikko Securities America, Inc. and Truist Securities, Inc., as representatives of the underwriters named in Exhibit A thereto. (Incorporated by reference to Exhibit 1.1 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on May 20, 2026.
10.2	Sixth Supplemental Indenture, dated as of May 27, 2026, relating to the 6.250% Notes due 2031, by and between Golub Capital BDC, Inc. and U.S. Bank Trust Company, National Association, as trustee (Incorporated by reference to Exhibit 4.2 to the Registrant's Current Report on Form 8-K (File No. 814-00794), filed on May 27, 2026).
10.3	Fourth Amended and Restated Senior Secured Revolving Credit Agreement, dated as of July 2, 2026, by and among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent, and the lenders, syndication agents, joint bookrunners, and joint lead arrangers party thereto. (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on July 9, 2026).
31.1	Certification of Chief Executive Officer pursuant to Rule 13a-14 of the Securities Exchange Act of 1934, as amended.	*
31.2	Certification of Chief Financial Officer pursuant to Rule 13a-14 of the Securities Exchange Act of 1934, as amended.	*
32.1	Certification pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.	*
101.INS	Inline XBRL Instance Document - the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.	*
101.SCH	Inline XBRL Taxonomy Extension Schema Document.	*
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document	*
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document.	*
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document.	*
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document.	*
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).	*

Filed herewith

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	Golub Capital BDC, Inc.
Date: August 3, 2026	By	/s/ David B. Golub
		David B. Golub
		Chief Executive Officer
		(Principal Executive Officer)
Date: August 3, 2026	By	/s/ Christopher C. Ericson
		Christopher C. Ericson
		Chief Financial Officer
		(Principal Accounting and Financial Officer)

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.