GOLUB CAPITAL BDC, Inc.

For the period ended Sep 30, 2025. Filed Nov 18, 2025.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Nov 18, 2025

GBDC$12.75+0.4%Stored close · as of Nov 10, 2026

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Contents

Item 15. Exhibits and Financial Statement Schedules

The following documents are filed as part of this annual report on Form 10-K:

(1)	Financial Statements — Refer to Item 8 starting on page 131
(2)	Financial Statement Schedules — None
(3)	Exhibits

2.1	Agreement and Plan of Merger, by and among Golub Capital BDC, Inc., Golub Capital BDC 3, Inc., Park Avenue Subsidiary Inc., GC Advisors, LLC, and solely for purposes of Section 1.9, Golub Capital LLC, dated as of January 16, 2024. (Incorporated by reference to Exhibit 2.1 to the Registrant's Current Report on Form 8-K (File No. 814-00794), filed on January 17, 2024).
2.2	Amendment No. 1 to Agreement and Plan of Merger by and among Golub Capital BDC, Inc., Golub Capital BDC 3, Inc., Park Avenue Subsidiary, Inc., GC Advisors, LLC, and solely for purposes of Section 1.9, Golub Capital LLC, dated as of April 11, 2024 (Incorporated by reference to Exhibit 4(b) filed with Amendment No. 1 to the Registrant’s Registration Statement on Form N-14 (File No. 333-277325), filed on April 12, 2024).
3.1	Form of Certificate of Incorporation (Incorporated by reference to Exhibit (a)(2) to the Registrant’s Pre-effective Amendment No. 3 to the Registration Statement on Form N-2 (File No. 333-163279), filed on March 25, 2010).
3.2	Certificate of Amendment to Certificate of Incorporation of Golub Capital BDC, Inc. (Incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K (File No. 814-00794), filed on September 4, 2019).
3.3	Certificate of Amendment to Certificate of Incorporation (Incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K (File No. 814-00794), filed February 18, 2022).
3.4	Amended and Restated Bylaws (Incorporated by reference to Exhibit 3.3 to the Registrant's Form 10-K (File No. 814-00794), filed November 21, 2022.)
3.5	Certificate of Amendment to Certificate of Incorporation of Golub Capital BDC, Inc. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on February 25, 2025).
3.6	Second Amended and Restated Bylaws of Golub Capital BDC, Inc. (Incorporated by reference to Exhibit 3.2 to the Registrant’s Quarterly Report on Form 10-Q (File No. 814-00794), filed on May 5, 2025).
4.1	Form of Stock Certificate (Incorporated by reference to Exhibit (d) to the Registrant’s Pre-effective Amendment No. 3 to the Registration Statement on Form N-2 (File No. 333-163279), filed on March 25, 2010).
4.2	Form of Subscription Certificate (Incorporated by reference to Exhibit (d)(2) to the Registrant’s Registration Statement on Form N-2 (File No. 333-174756), filed on June 7, 2011).
4.3	Form of Subscription Agent Agreement (Incorporated by reference to Exhibit (d)(4) to the Registrant’s Registration Statement on Form N-2 (File No. 333-174756), filed on June 7, 2011).
4.4	Form of Warrant Agreement (Incorporated by reference to Exhibit (d)(5) to the Registrant’s Registration Statement on Form N-2 (File No. 333-174756), filed on June 7, 2011).
4.5	Form of Certificate of Designation for Preferred Stock (Incorporated by reference to Exhibit (d)(6) to the Registrant’s Pre-effective Amendment No. 1 to the Registration Statement on Form N-2 (File No. 333-174756), filed on August 25, 2011).
4.6	Form T-1 Statement of Eligibility of U.S. Bank National Association, as Trustee, with respect to the Form of Indenture (Incorporated by reference to Exhibit (d)(7) to the Registrant’s Pre-effective Amendment No. 1 to the Registration Statement on Form N-2 (File No. 333-174756), filed on August 25, 2011).
4.7	Description of securities.	*

4.8	Indenture, dated as of October 2, 2020, by and between Golub Capital BDC, Inc. and U.S. Bank National Association, as trustee (Incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on October 5, 2020).
4.9	Second Supplemental Indenture, dated as of February 24, 2021, related to the 2.500% Notes due 2026, by and between Golub Capital BDC, Inc. and U.S. Bank National Association, as trustee. (Incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K (File No.814-00794), filed on February 24, 2021).
4.10	Form of 2.500% Notes due 2026. (Incorporated by reference to Exhibit 4.2 to the Registrant's Current Report on Form 8-K (File No. File No. 814-00794), filed on February 24, 2021).
4.11	Third Supplemental Indenture, dated as of August 3, 2021, relating to the 2.050% Notes due 2027, by and between Golub Capital BDC, Inc. and U.S. Bank 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 August 3, 2021).
4.12	Fourth Supplemental Indenture, dated as of December 5, 2023, relating to the 7.050% Notes due 2028, by and between Golub Capital BDC, Inc. and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank 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 December 5, 2023).
4.13	Fifth Supplemental Indenture, dated as of February 1, 2024, relating to the 6.000% Notes due 2029, by and between Golub Capital BDC, Inc. and U.S. Bank Trust Company, National Association (as successor in interest to U.S. Bank 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 February 1, 2024).
4.14	Form of 2.050% Notes due 2027. (Incorporated by reference to Exhibit 4.3 to the Registrant's Current Report on Form 8-K (File No. 814-00794), filed on August 3, 2021).
10.1	Fifth Amended and Restated Investment Advisory Agreement, dated as of June 3, 2024, by and between Golub Capital BDC, Inc. and GC Advisors, LLC. (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on June 3, 2024).
10.2	Form of Custody Agreement (Incorporated by reference to Exhibit (j) to the Registrant’s Pre-effective Amendment No. 5 to the Registration Statement on Form N-2 (File No. 333-163279), filed on April 12, 2010).
10.3	Form of Administration Agreement between Registrant and GC Service Company LLC (Incorporated by reference to Exhibit (k)(2) to the Registrant’s Pre-effective Amendment No. 3 to the Registration Statement on Form N-2 (File No. 333-163279), filed on March 24, 2010).
10.4	Form of Trademark License Agreement between the Registrant and Golub Capital LLC (Incorporated by reference to Exhibit (k)(3) to the Registrant’s Pre-effective Amendment No. 3 to the Registration Statement on Form N-2 (File No. 333-163279), filed on March 24, 2010).
10.5	Amended and Restated Dividend Reinvestment Plan (Incorporated by reference to Exhibit 10.1 to Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on May 5, 2011).
10.6	Amended and Restated Revolving Loan Agreement, dated as of June 21, 2019, by and among the Registrant, as the borrower, and GC Advisors LLC, as the lender (Incorporated by reference to Exhibit 10.1 to Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on June 25, 2019).
10.7	First Amendment to the Amended and Restated Revolving Loan Agreement, dated as of October 28, 2019, by and between Golub Capital BDC, Inc. as the borrower and GC Advisors LLC as the lender (Incorporated by reference to Exhibit 10.1 to Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on October 31, 2019).
10.8	Second Amendment to Amended and Restated Revolving Loan Agreement, dated as of June 15, 2022, by and among Golub Capital BDC, Inc., as the borrower, and GC Advisors LLC, as the lender. (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on June 16, 2022).
10.9	Third Amendment to Revolving Loan Agreement, dated as of June 11, 2024, by and between Golub Capital BDC, Inc., as the borrower, and GC Advisors LLC, as the lender. (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on June 13, 2024).

10.10	Senior Secured Revolving Credit Agreement, dated as of February 11, 2021, by and among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral 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 February 12, 2021).
10.11	Commitment Increase Agreement, dated as of October 14, 2021, by Signature Bank, as Increasing Lender, Wells Fargo Bank, National Association and Regions Bank, each as an Assuming Lender, in favor of the Company, as borrower, and JPMorgan Chase Bank, N.A., as administrative agent under the Revolving Credit Facility. (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on October 18, 2021).
10.12	Commitment Increase Agreement, dated as of November 23, 2021, by First National Bank of Pennsylvania, as Assuming Lender, JPMorgan Chase Bank, N.A., MUFG Union Bank, N.A., CIBC Bank USA, and Sumitomo Mitsui Banking Corporation, each as an Increasing Lender, in favor of Golub Capital BDC, Inc., as borrower, and JPMorgan Chase Bank, N.A., as administrative agent under the Senior Secured Revolving Credit Facility, dated as of February 11, 2021, as amended, among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral agent, and the lenders, syndication agents, joint bookrunners, and joint lead arrangers party thereto. (Incorporated by reference to Exhibit 10.2 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on November 24, 2021).
10.13	Amendment No. 1, dated as of November 19, 2021, to Senior Secured Revolving Credit Agreement, dated as of February 11, 2021, by and among, Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral 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/A (File No. 814-00794), filed on December 14, 2021).
10.14	Commitment Increase Agreement, dated as of December 17, 2021, by Comerica Bank, and Capital One, National Association, each as an Assuming Lender, in favor of Golub Capital BDC, Inc., as borrower, and JPMorgan Chase Bank, N.A., as administrative agent under the Senior Secured Revolving Credit Facility, dated as of February 11, 2021, as amended, among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral 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 December 21, 2021).
10.15	Amendment No. 2, dated as of September 2, 2022, to Senior Secured Revolving Credit Agreement, dated as of February 11, 2021, as amended, by and among, Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral 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 September 8, 2022).
10.16	Commitment Increase Agreement, dated as of September 16, 2022, by Santander Bank, N.A., as an Assuming Lender, in favor of Golub Capital BDC, Inc., as borrower, and JPMorgan Chase Bank, N.A., as administrative agent under the Senior Secured Revolving Credit Facility, dated as of February 11, 2021, as amended, among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral 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 September 20, 2022).
10.17	Amended and Restated Senior Secured Revolving Credit Agreement, dated as of March 17, 2023, by and among Golub Capital BDC, Inc., as borrower, and JPMorgan Chase Bank, N.A., as administrative agent under the Senior Secured Revolving Credit Facility, dated as of February 11, 2021, as amended, among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral 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 March 20, 2023).
10.18	Amendment No. 1 to the Amended and Restated Senior Secured Revolving Credit Agreement, dated as of March 17, 2023, by and among Golub Capital BDC, Inc., JPMorgan Chase Bank, N.A., as administrative agent and collateral agent, and the lenders, syndication agents, joint bookrunners, and joint lead arrangers party thereto, dated June 7, 2024. (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on June 13, 2024).

10.19	Second Amended and Restated Senior Secured Revolving Credit Agreement, dated as of August 6, 2024, by and among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent, and the lenders 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 August 13, 2024).
10.20	Equity Distribution Agreement, dated as of October 6, 2023, by and among Golub Capital BDC, Inc. GC Advisors LLC, Golub Capital LLC, Keefe Bruyette & Woods, Inc. and Regions Securities LLC.
10.21	Amended and Restated Indenture dated as of November 18, 2024 between Golub Capital BDC CLO 8 LLC, as issuer, and The Bank of New York Mellon Trust Company, National Association, as trustee. (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on November 21, 2024).
10.22	Note Purchase Agreement dated as of November 18, 2024 between Golub Capital BDC CLO 8 LLC, as issuer, and Deutsche Bank Securities Inc., as initial purchaser. (Incorporated by reference to Exhibit 10.2 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on November 21, 2024).
10.23	Amended and Restated Collateral Management Agreement dated as of November 18, 2024 between Golub Capital BDC CLO 8 LLC, as issuer, and GC Advisors LLC, as collateral manager.(Incorporated by reference to Exhibit 10.3 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on November 21, 2024).
10.24	Amended and Restated Master Loan Sale Agreement dated as of November 18, 2024 among Golub Capital BDC, Inc., as seller, Golub Capital BDC CLO 8 Depositor LLC, as intermediate seller, and Golub Capital BDC CLO 8 LLC, as buyer. (Incorporated by reference to Exhibit 10.4 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on November 21, 2024).
10.25	Commitment Increase Agreement, dated as of November 14, 2024, by BNP Paribas, as an Assuming Lender, in favor of Golub Capital BDC, Inc., as borrower, and JPMorgan Chase Bank, N.A., as administrative agent under the Senior Secured Revolving Credit Facility, dated as of August 6, 2024, as amended, among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral agent, and the lenders, syndication agents, joint bookrunners, and joint lead arrangers party thereto. (Incorporated by reference to Exhibit 10.5 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on November 21, 2024).
10.26	First Amendment to the Equity Distribution Agreement, dated December 4, 2024, by and among Golub Capital BDC, Inc., GC Advisors LLC, Golub Capital LLC, Keefe, Bruyette & Woods, Inc. and Regions Securities LLC. (Incorporated by reference to Exhibit 10.6 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on December 6, 2024).
10.27	Commitment Increase Agreement, dated as of December 6, 2024, by Royal Bank of Canada, as an Assuming Lender, in favor of Golub Capital BDC, Inc., as borrower, and JPMorgan Chase Bank, N.A., as administrative agent under the Senior Secured Revolving Credit Facility, dated as of August 6, 2024, as amended, among Golub Capital BDC, Inc., as borrower, JPMorgan Chase Bank, N.A., as administrative agent and as collateral agent, and the lenders, syndication agents, joint bookrunners, and joint lead arrangers party thereto. (Incorporated by reference to Exhibit 10.7 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on December 6, 2024).
10.28	Third Amended and Restated Senior Secured Revolving Credit Agreement, dated as of April 4, 2025, 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 April 10, 2025).
10.29	Second Amendment to the Equity Distribution Agreement, dated May 16, 2025, by and among Golub Capital BDC, Inc., GC Advisors LLC, Golub Capital LLC, Keefe, Bruyette & Woods, Inc. and Regions Securities LLC (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on May 16, 2025).
10.30	Fourth Amendment to Amended and Restated Revolving Loan Agreement dated as of June 13, 2025, by and between Golub Capital BDC Inc., as the borrower and GC Advisors LLC as the lender. (Incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K (File No. 814-00794), filed on June 16, 2025).
14.1	Code of Ethics of the Registrant and GC Advisors
14.2	Code of Ethics of GC Advisors LLC.

19.1	Insider Trading Policy (Included in the Code of Ethics of the Registrant and GC Advisors)
21.1	List of Subsidiaries.	*
23.1	Consent of Ernst & Young LLP.	*
25.1	Statement of Eligibility of Trustee on From T-1. (Incorporated by reference to Exhibit 25.1 to the Registrant's Form 10-Q (File No. 814-00794), filed February 7, 2020.)
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 of Chief Executive Officer and Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002.	*
97.1	Clawback Policy (Incorporated by reference to Exhibit 97.1 to the Registrant’s Form 10-K (File No. 814-00794), filed on November 20, 2023).
99.1	Privacy Policy of the Registrant.	*
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	*
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101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document.	*
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104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101).	*

Filed herewith

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