GBDC / Golub Capital BDC, Inc. - Документы SEC, Годовой отчет, Доверенное заявление

Голуб Капитал БДК, Инк.
US ˙ NasdaqGS ˙ US38173M1027

Основная статистика
LEI 2549005WE0QLGK9APF78
CIK 1476765
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Golub Capital BDC, Inc.
SEC Filings (Chronological Order)
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August 29, 2025 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): August 25, 2025 GOLUB CAPITAL BDC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): August 25, 2025 GOLUB CAPITAL BDC, INC. (Exact name of Registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or other jurisdiction of incorporation) (Commission

August 4, 2025 10-Q

_____________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

August 4, 2025 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): August 4, 2025 GOLUB CAPITAL BDC, I

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): August 4, 2025 GOLUB CAPITAL BDC, INC.

August 4, 2025 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): August 4, 2025 GOLUB CAPITAL BDC, I

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): August 4, 2025 GOLUB CAPITAL BDC, INC.

August 4, 2025 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED JUNE 30, 2025 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,

gbdcfy2025q3epfinal Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC.

August 4, 2025 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2025 Third Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2025 Third Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share NEW YORK, NY, August 4, 2025 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced its financial results for its third fiscal quarter ended June 30, 2025. Except where the context suggests otherwise, the terms “we,” “

July 7, 2025 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2025 Third Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2025 Third Quarter Results NEW YORK, NY, July 7, 2025 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended June 30, 2025 on Monday, August 4, 2025 after the close of the financial markets. Golub Capital B

July 7, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 7, 2025 GOLUB CAPITAL BDC, INC.

June 16, 2025 EX-10.1

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

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.

June 16, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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.

May 29, 2025 8-K

Other Events

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): May 27, 2025 GOLUB CAPITAL BDC, INC.

May 16, 2025 EX-10.1

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.

Exhibit 10.1 Golub Capital BDC, Inc. Shares of Common Stock, par value $0.001 per share SECOND Amendment to the Equity Distribution Agreement This Second Amendment, dated May 16, 2025 (this “Amendment”), is to that certain Equity Distribution Agreement, dated October 6, 2023 (as amended on December 6, 2024), by and among Golub Capital BDC, Inc., a Delaware corporation (the “Company”), GC Advisors

May 16, 2025 EX-FILING FEES

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables N-2 GOLUB CAPITAL BDC, Inc. Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective D

May 16, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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): May 16, 2025 GOLUB CAPITAL BDC, INC.

May 16, 2025 424B3

$250,000,000 GOLUB CAPITAL BDC, INC. Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(3)  Registration No.: 333-286240 PROSPECTUS SUPPLEMENT (To Prospectus dated March 28, 2025) $250,000,000 GOLUB CAPITAL BDC, INC. Common Stock We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company under the Investment Company Act of 1940, as amended, o

May 8, 2025 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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): May 2, 2025 GOLUB CAPITAL BDC, INC.

May 5, 2025 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED MARCH 31, 2025 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might

gbdcfy2025q2epfinal Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC.

May 5, 2025 EX-3.2

1 SECOND AMENDED AND RESTATED BYLAWS OF GOLUB CAPITAL BDC, INC. ARTICLE I. OFFICES 1.1 Registered Office. The registered office of Golub Capital BDC, Inc. (the “Corporation”) in the State of Delaware shall be established and maintained at c/o The Cor

1 SECOND AMENDED AND RESTATED BYLAWS OF GOLUB CAPITAL BDC, INC. ARTICLE I. OFFICES 1.1 Registered Office. The registered office of Golub Capital BDC, Inc. (the “Corporation”) in the State of Delaware shall be established and maintained at c/o The Corporation Trust Company, 1209 Orange Street, City of Wilmington, County of New Castle, Delaware 19801 and The Corporation Trust Company shall be the re

May 5, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 5, 2025 GOLUB CAPITAL BDC, INC.

May 5, 2025 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2025 Second Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2025 Second Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share NEW YORK, NY, May 5, 2025 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced its financial results for its second fiscal quarter ended March 31, 2025. Except where the context suggests otherwise, the terms “we,” “

May 5, 2025 10-Q

_____________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2025 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

May 5, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 5, 2025 GOLUB CAPITAL BDC, INC.

April 10, 2025 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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): April 4, 2025 Golub Capital BDC, Inc. (Exact name of registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or Other Jurisdiction of Incorporation) (Commission F

April 10, 2025 EX-10.1

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.

Exhibit 10.1 Execution Version THIRD AMENDED AND RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT dated as of April 4, 2025 among GOLUB CAPITAL BDC, INC., as Borrower The LENDERS Party Hereto and JPMORGAN CHASE BANK, N.A. as Administrative Agent and as Collateral Agent $1,997,500,000 MUFG BANK, LTD., BANCO SANTANDER, S.A., NEW YORK BRANCH, SUMITOMO MITSUI BANKING CORPORATION, TRUIST BANK, and WE

April 4, 2025 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2025 Second Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2025 Second Quarter Results NEW YORK, NY, April 4, 2025 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended March 31, 2025 on Monday, May 5, 2025 after the close of the financial markets. Golub Capital B

April 4, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 4, 2025 GOLUB CAPITAL BDC, INC.

March 31, 2025 EX-99.(N)

Consent of Ernst & Young LLP.*

Exhibit (n) Consent of Independent Registered Public Accounting Firm We consent to the reference to our firm under the captions “Senior Securities” and “Independent Registered Public Accounting Firm” in the Prospectus, dated March 28, 2025, and included in this Registration Statement (Form N-2) of Golub Capital BDC, Inc.

March 31, 2025 EX-FILING FEES

Filing Fee Table*

Calculation of Filing Fee Tables N-2 GOLUB CAPITAL BDC, Inc. Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective D

March 31, 2025 EX-99.(L)

Opinion and Consent of Dechert LLP, special counsel for Registrant.*

Exhibit (l) One International Place, 40th Floor 100 Oliver Street Boston, MA 02110-2605 +1 617 728 7100 Main +1 617 275 8374 Fax www.

March 31, 2025 EX-99.(D)(7)

Form T-1 Statement of Eligibility of U.S. Bank Trust Company, National Association, as Trustee, with respect to the Form of Indenture.*

Exhibit (d)(7) securities and exchange commission Washington, D.C. 20549 FORM T-1 Statement of Eligibility Under The Trust Indenture Act of 1939 of a Corporation Designated to Act as Trustee Check if an Application to Determine Eligibility of a Trustee Pursuant to Section 305(b)(2) ☐ U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION (Exact name of Trustee as specified in its charter) 91-1821036 I.R.S.

March 31, 2025 N-2ASR

As filed with the Securities and Exchange Commission on March 28, 2025 Securities Act File No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-2 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 GOLUB CAPITAL

Table of Contents As filed with the Securities and Exchange Commission on March 28, 2025 Securities Act File No.

February 25, 2025 EX-3.1

Certificate of Amendment of 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 on February 25, 2025).

Exhibit 3.1 CERTIFICATE OF AMENDMENT OF CERTIFICATE OF INCORPORATION OF GOLUB CAPITAL BDC, INC. Golub Capital BDC, Inc., a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware (the “Corporation”), DOES HEREBY CERTIFY: FIRST: That the Board of Directors of the Corporation, acting in accordance with Sections 141 and 242 of the General Corpora

February 25, 2025 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

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): February 21, 2025 GOLUB CAPITAL BDC, INC.

February 6, 2025 8-K

Submission of Matters to a Vote of Security Holders

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): February 3, 2025 GOLUB CAPITAL BDC, INC.

February 4, 2025 10-Q

______________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

February 4, 2025 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED DECEMBER 31, 2024 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “mi

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED DECEMBER 31, 2024 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,” “will,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “anticipate,” “predict,” “potential,” “plan” or similar wo

February 4, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 4, 2025 GOLUB CAPITAL BDC, INC.

February 4, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 4, 2025 GOLUB CAPITAL BDC, INC.

February 4, 2025 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2025 First Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2025 First Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share NEW YORK, NY, February 4, 2025 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced its financial results for its first fiscal quarter ended December 31, 2024. Except where the context suggests otherwise, the terms “

January 6, 2025 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2025 First Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2025 First Quarter Results NEW YORK, NY, January 6, 2025 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended December 31, 2024 on Tuesday, February 4, 2025 after the close of the financial markets. Golub

January 6, 2025 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 6, 2025 GOLUB CAPITAL BDC, INC.

December 13, 2024 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2

December 13, 2024 DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2

December 13, 2024 CORRESP

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1900 K Street, NW Washington, DC 20006-1110 +1 202 261 3300 Main +1 202 261 3333 Fax www.

December 6, 2024 PRE 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by Party other than the Registrant ¨ Check the appropriate box: x Preliminary Proxy Statement ¨ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2

December 6, 2024 EX-10.2

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

Exhibit 10.2 Execution Version COMMITMENT INCREASE AGREEMENT December 6, 2024 JPMorgan Chase Bank, N.A.,    as Administrative Agent 500 Stanton Christiana Road NCC 5, Floor 1 Newark, DE 19713-2107 Attention: Loan & Agency Services Group Ladies and Gentlemen: We refer to the Second Amended and Restated Senior Secured Revolving Credit Agreement dated as of August 6, 2024 (as amended, modified or sup

December 6, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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): December 4, 2024 GOLUB CAPITAL BDC, INC.

December 6, 2024 EX-10.1

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.

Exhibit 10.1 Execution Version Golub Capital BDC, Inc. Shares of Common Stock, par value $0.001 per share First Amendment to the Equity Distribution Agreement This First Amendment, dated December 4, 2024 (this “Amendment”), is to that certain Equity Distribution Agreement, dated October 6, 2023, by and among Golub Capital BDC, Inc., a Delaware corporation (the “Company”), GC Advisors LLC, a Delawa

December 4, 2024 8-K

Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): December 3, 2024 GOLUB CAPITAL BDC, INC. (Exact name of Registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or other jurisdiction of incorporation) (Commissio

November 27, 2024 EX-1.1

Underwriting Agreement, dated November 25, 2024, by and among Golub Capital BDC, Inc., GC Advisors LLC, Golub Capital LLC, and SMBC Nikko Securities America, Inc., J.P. Morgan Securities LLC, Santander US Capital Markets LLC, and Truist Securities, Inc., as representatives of the underwriters named in Exhibit A thereto

Exhibit 1.1 Execution Version GOLUB CAPITAL BDC, INC. $150,000,000 Aggregate Principal Amount of 6.000% Notes due 2029 UNDERWRITING AGREEMENT Dated: November 25, 2024 GOLUB CAPITAL BDC, INC. $150,000,000 Aggregate Principal Amount of 6.000% Notes due 2029 UNDERWRITING AGREEMENT November 25, 2024 SMBC Nikko Securities America, Inc. J.P. Morgan Securities LLC Santander US Capital Markets LLC Truist

November 27, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): November 25, 2024 GOLUB CAPITAL BDC, INC. (Exact name of Registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or other jurisdiction of incorporation) (Commissi

November 26, 2024 EX-FILING FEES

Table 1: Newly Registered and Carry Forward Securities

Calculation of Filing Fee Tables N-2 GOLUB CAPITAL BDC, Inc. Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of Registration Fee Carry Forward Form Type Carry Forward File Number Carry Forward Initial Effective D

November 26, 2024 424B2

$150,000,000 GOLUB CAPITAL BDC, INC. 6.000% Notes due 2029

Table of Contents Filed Pursuant to Rule 424(b)(2)  Registration No. 333-265509 PROSPECTUS SUPPLEMENT (To Prospectus dated June 9, 2022) $150,000,000 GOLUB CAPITAL BDC, INC. 6.000% Notes due 2029 We are offering for sale $150,000,000 in aggregate principal amount of 6.000% notes due 2029, which we refer to as the Notes. The Notes will mature on July 15, 2029. We will pay interest on the Notes semi

November 25, 2024 FWP

Golub Capital BDC, Inc. 6.000% Notes due 2029 PRICING TERM SHEET November 25, 2024

Filed Pursuant to Rule 433 Issuer Free Writing Prospectus dated November 25, 2024 Relating to Preliminary Prospectus Supplement dated November 25, 2024 and Prospectus dated June 9, 2022 Registration No.

November 25, 2024 424B2

Subject to Completion Preliminary Prospectus Supplement dated November 25, 2024

TABLE OF CONTENTS The information in this preliminary prospectus supplement is not complete and may be changed.

November 21, 2024 EX-10.1

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.

Exhibit 10.1   EXECUTION VERSION     AMENDED AND RESTATED INDENTURE       by and between       GOLUB CAPITAL BDC CLO 8 LLC, Issuer       and       THE BANK OF NEW YORK MELLON TRUST COMPANY, NATIONAL ASSOCIATION, Trustee         Dated as of November 18, 2024             TABLE OF CONTENTS Page ARTICLE I DEFINITIONS 3 Section 1.1 Definitions 3 Section 1.2 Usage of Terms 82 Section 1.3 Assumptions as

November 21, 2024 EX-10.2

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.

Exhibit 10.2 EXECUTION VERSION STRICTLY PRIVATE AND CONFIDENTIAL Dated as of November 18, 2024 U.S.$1,192,400,000 Class A-1-R Senior Secured Floating Rate Notes due 2036 U.S.$171,600,000 Class A-2RR Senior Secured Floating Rate Notes due 2036 U.S.$165,000,000 Class B-R Senior Secured Floating Rate Notes due 2036 U.S.$154,000,000 Class C-R Secured Deferrable Floating Rate Notes due 2036 U.S.$517,50

November 21, 2024 EX-10.5

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.

Exhibit 10.5 Execution Version COMMITMENT INCREASE AGREEMENT November 15, 2024 JPMorgan Chase Bank, N.A., as Administrative Agent 500 Stanton Christiana Road NCC 5, Floor 1 Newark, DE 19713-2107 Attention: Loan & Agency Services Group Ladies and Gentlemen: We refer to the Second Amended and Restated Senior Secured Revolving Credit Agreement dated as of August 6, 2024 (as amended, modified or suppl

November 21, 2024 EX-10.3

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.

Exhibit 10.3 EXECUTION VERSION AMENDED AND RESTATED COLLATERAL MANAGEMENT AGREEMENT dated as of November 18, 2024 by and between GOLUB CAPITAL BDC CLO 8 LLC, as Issuer and GC ADVISORS LLC, as Collateral Manager Table of Contents   Page Section 1. Definitions. 2 Section 2. General Duties and Authority of the Collateral Manager. 5 Section 3. Purchase and Sale Transactions; Brokerage. 11 Section 4. A

November 21, 2024 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): November 15, 2024 GOLUB CAPITAL BDC

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): November 15, 2024 GOLUB CAPITAL BDC, INC.

November 21, 2024 EX-10.4

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.

Exhibit 10.4 EXECUTION VERSION AMENDED AND RESTATED MASTER LOAN SALE AGREEMENT by and among Golub capital BDC, INC., as the Seller, GOLUB CAPITAL BDC CLO 8 DEPOSITOR LLC, as the Intermediate Seller, and GOLUB CAPITAL BDC CLO 8 LLC, as the Buyer Dated as of November 18, 2024 Table of Contents Page ARTICLE I DEFINITIONS 1 Section 1.01 Definitions 1 Section 1.02 Other Terms 5 Section 1.03 Computation

November 19, 2024 EX-14.2

Code of Ethics of GC Advisors (Incorporated by reference to Exhibit 14.2 to the Registrant’s Annual Report on Form 10-K (File No. 814-00794), filed on November 19, 2024).

GC ADVISORS LLC CODE OF ETHICS General This Code of Ethics for the Adviser supplements (i) the Joint Code of Ethics for Golub Capital BDC, Inc.

November 19, 2024 EX-21.1

SUBSIDIARIES OF GOLUB CAPITAL BDC, INC. Name Jurisdiction Golub Capital BDC CLO III Depositor LLC Delaware Golub Capital BDC CLO III LLC Delaware Golub Capital BDC Holdings, LLC Delaware GCIC Holdings LLC Delaware GCIC CLO II Depositor LLC Delaware G

EXHIBIT 21.1 SUBSIDIARIES OF GOLUB CAPITAL BDC, INC. Name Jurisdiction Golub Capital BDC CLO III Depositor LLC Delaware Golub Capital BDC CLO III LLC Delaware Golub Capital BDC Holdings, LLC Delaware GCIC Holdings LLC Delaware GCIC CLO II Depositor LLC Delaware GCIC CLO II LLC Delaware GCIC Funding LLC Delaware GBDC Holdings Coinvest, Inc. Delaware GBDC Holdings ED Coinvest, Inc. Delaware GCIC Nor

November 19, 2024 EX-14.1

Code of Ethics of the Registrant and GC Advisors (Incorporated by reference to Exhibit 14.1 to the Registrant’s Annual Report on Form 10-K (File No. 814-00794), filed on November 19, 2024).

CODE OF ETHICS FOR GOLUB CAPITAL BDC, INC. GOLUB CAPITAL DIRECT LENDING CORPORATION GOLUB CAPITAL BDC 4, INC. GOLUB CAPITAL DIRECT LENDING UNLEVERED CORPORATION GOLUB CAPITAL PRIVATE CREDIT FUND GC ADVISORS LLC Section I Statement of General Fiduciary Principles This Code of Ethics (the “Code”) has been adopted by each of Golub Capital BDC, Inc., Golub Capital BDC 4, Inc., Golub Capital Direct Len

November 19, 2024 EX-99.1

GOLUB CAPITAL BDC, INC. (THE “COMPANY”) INVESTOR PRIVACY NOTICE

EXHIBIT 99.1 GOLUB CAPITAL BDC, INC. (THE “COMPANY”) INVESTOR PRIVACY NOTICE Maintaining the confidentiality of the personal information of our current and prospective investors is one of our highest priorities. This notice sets forth the type of personal information we collect, how that information is used by us, and how we protect your personal information. In this Investor Privacy Notice, “we”,

November 19, 2024 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED SEPTEMBER 30, 2024 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “m

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED SEPTEMBER 30, 2024 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,” “will,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “anticipate,” “predict,” “potential,” “plan” or similar w

November 19, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2024 Fourth Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share, and a Fiscal Year 2024 Fourth Quarter Supplemental Distribution of $0.04 Per Share

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2024 Fourth Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share, and a Fiscal Year 2024 Fourth Quarter Supplemental Distribution of $0.04 Per Share NEW YORK, NY, November 19, 2024 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced its financial results for its fourth fiscal qu

November 19, 2024 EX-4.7

DESCRIPTION OF SECURITIES

Exhibit 4.7 DESCRIPTION OF SECURITIES As of September 30, 2024, Golub Capital BDC, Inc. (“we,” “our,” “us” or the “Company”) had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): our common stock, par value $0.001 per share. For purposes of this exhibit, references to “we,” “our” and “us” refer only to Golub Capital BDC, In

November 19, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 19, 2024 GOLUB CAPITAL BDC, INC.

November 19, 2024 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Form 10-K ______________________________________________________________________________________________________ (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE S

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Form 10-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30, 2024 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00794 GOLUB CAPITAL BDC, INC.

November 19, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 19, 2024 GOLUB CAPITAL BDC, INC.

November 18, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

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): November 18, 2024 GOLUB CAPITAL BDC, INC.

November 18, 2024 EX-99.1

Golub Capital BDC, Inc. Announces a Series of Debt Funding Structure Initiatives Aimed at Reducing Borrowing Costs and Providing Additional Investment Flexibility NEW YORK, November 18, 2024 – Golub Capital BDC, Inc. (“GBDC” or the “Company”), a busi

Golub Capital BDC, Inc. Announces a Series of Debt Funding Structure Initiatives Aimed at Reducing Borrowing Costs and Providing Additional Investment Flexibility NEW YORK, November 18, 2024 – Golub Capital BDC, Inc. (“GBDC” or the “Company”), a business development company (Nasdaq: GBDC), and Golub Capital, today announced a series of debt funding structure initiatives expected to reduce GBDC’s p

October 7, 2024 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): October 7, 2024 GOLUB CAPITAL BDC,

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): October 7, 2024 GOLUB CAPITAL BDC, INC.

October 7, 2024 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2024 Fourth Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2024 Fourth Quarter Results NEW YORK, NY, October 7, 2024 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter and the year ended September 30, 2024 on Tuesday, November 19, 2024 after the close of the financia

September 30, 2024 CORRESP

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September 30, 2024 VIA EDGAR U.S. Securities and Exchange Commission Division of Investment Management Disclosure Review and Accounting Office 100 F Street, N.E. Washington, DC 20549 Attention: Jeffrey W. Long Re: Golub Capital BDC, Inc. (File No. 814-00794) Golub Capital Direct Lending Corporation (File No. 814-01412) Dear Mr. Long: On behalf of Golub Capital BDC, Inc. (“GBDC”) and Golub Capital

August 12, 2024 EX-10.1

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.

Exhibit 10.1 Execution Version SECOND AMENDED AND RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT dated as of August 6, 2024 among GOLUB CAPITAL BDC, INC., as Borrower The LENDERS Party Hereto and JPMORGAN CHASE BANK, N.A. as Administrative Agent and as Collateral Agent $1,822,500,000 MUFG BANK, LTD., BANCO SANTANDER, S.A., NEW YORK BRANCH, SUMITOMO MITSUI BANKING CORPORATION, TRUIST BANK, and

August 12, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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): August 6, 2024 Golub Capital BDC, Inc. (Exact name of registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or Other Jurisdiction of Incorporation) (Commission

August 5, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): August 5, 2024 GOLUB CAPITAL BDC, INC.

August 5, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2024 Third Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share, and a Fiscal Year 2024 Third Quarter Supplemental Distribution of $0.05 Per Share; Closes Previously Announced Tran

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2024 Third Quarter Financial Results Declares Quarterly Distribution of $0.39 Per Share, and a Fiscal Year 2024 Third Quarter Supplemental Distribution of $0.05 Per Share; Closes Previously Announced Transformative Merger with GBDC 3. NEW YORK, NY, August 5, 2024 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), tod

August 5, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): August 5, 2024 GOLUB CAPITAL BDC, INC.

August 5, 2024 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED JUNE 30, 2024 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED JUNE 30, 2024 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,” “will,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “anticipate,” “predict,” “potential,” “plan” or similar words.

August 5, 2024 10-Q

______________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

July 2, 2024 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2024 Third Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2024 Third Quarter Results NEW YORK, NY, July 2, 2024 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended June 30, 2024 on Monday, August 5, 2024 after the close of the financial markets. Golub Capital B

July 2, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 2, 2024 GOLUB CAPITAL BDC, INC.

June 13, 2024 8-K

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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 7, 2024 GOLUB CAPITAL BDC, INC.

June 13, 2024 EX-10.1

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.

Exhibit 10.1   Execution Version   AMENDMENT NO. 1   THIS AMENDMENT NO. 1 (this “Amendment”), dated as of June 7, 2024 (the “Signing Date”), to Credit Agreement (capitalized terms used herein and not otherwise defined shall have the meanings given to such terms in the Amended Credit Agreement (as defined below)) is among GOLUB CAPITAL BDC, INC. (the “Borrower”), each lender party to the Existing C

June 13, 2024 EX-10.2

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.

Exhibit 10.2 THIRD AMENDMENT TO REVOLVING LOAN AGREEMENT This THIRD 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 11, 2024. RECITALS WHEREAS, Borrower and Lender desire to

June 3, 2024 EX-12

Opinion and Consent of Dechert LLP. *

Exhibit 12 June 3, 2024 Golub Capital BDC 3, Inc. 200 Park Avenue New York, New York 10166 Golub Capital BDC, Inc. 200 Park Avenue New York, New York 10166 Ladies and Gentlemen: You have requested our opinion regarding certain federal income tax consequences to Golub Capital BDC, Inc., a business development company organized as a Delaware corporation (the “Acquiring Fund”), to Golub Capital BDC 3

June 3, 2024 POS 8C

As filed with the Securities and Exchange Commission on June 3, 2024

As filed with the Securities and Exchange Commission on June 3, 2024 Registration No.

June 3, 2024 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

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 3, 2024 GOLUB CAPITAL BDC, INC.

June 3, 2024 EX-99.1

Golub Capital BDC, Inc. Closes Merger With Golub Capital BDC 3, Inc., Declares Special Distributions Totaling $0.15 Per Share

Exhibit 99.1 Golub Capital BDC, Inc. Closes Merger With Golub Capital BDC 3, Inc., Declares Special Distributions Totaling $0.15 Per Share NEW YORK, June 3, 2024 — Golub Capital BDC, Inc. (“GBDC,” or the “Company”), a business development company (Nasdaq: GBDC), announced today that it has completed its previously announced merger with Golub Capital BDC 3, Inc. (“GBDC 3”), with GBDC as the survivi

June 3, 2024 EX-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.

Exhibit 10.1 FIFTH AMENDED AND RESTATED INVESTMENT ADVISORY AGREEMENT BETWEEN GOLUB CAPITAL BDC, INC. AND GC ADVISORS LLC Fifth Amended and Restated Investment Advisory Agreement made this 3rd day of June, 2024 (this “Agreement”) and effective as of June 3, 2024, by and between GOLUB CAPITAL BDC, INC., a Delaware corporation (the “Corporation”), and GC ADVISORS LLC, a Delaware limited liability co

May 29, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Stockholder Approval of Proposed Merger With Golub Capital BDC 3, Inc. NEW YORK, May 29, 2024 — Golub Capital BDC, Inc. (“GBDC,” or the “Company”), a business development company (Nasdaq: GBDC), announced today that

Golub Capital BDC, Inc. Announces Stockholder Approval of Proposed Merger With Golub Capital BDC 3, Inc. NEW YORK, May 29, 2024 — Golub Capital BDC, Inc. (“GBDC,” or the “Company”), a business development company (Nasdaq: GBDC), announced today that it obtained stockholder approval of the proposal related to its merger with Golub Capital BDC 3, Inc. (“GBDC 3”) at a special meeting of the Company’s

May 29, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Stockholder Approval of Proposed Merger With Golub Capital BDC 3, Inc. NEW YORK, May 29, 2024 — Golub Capital BDC, Inc. (“GBDC,” or the “Company”), a business development company (Nasdaq: GBDC), announced today that

Golub Capital BDC, Inc. Announces Stockholder Approval of Proposed Merger With Golub Capital BDC 3, Inc. NEW YORK, May 29, 2024 — Golub Capital BDC, Inc. (“GBDC,” or the “Company”), a business development company (Nasdaq: GBDC), announced today that it obtained stockholder approval of the proposal related to its merger with Golub Capital BDC 3, Inc. (“GBDC 3”) at a special meeting of the Company’s

May 29, 2024 425

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): May 29, 2024 GOLUB CAPITAL BDC, INC

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-6(b) of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 File No. of Related Registration Statement 333-277325 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 8-K CURRENT REPORT Pursuant to Sect

May 29, 2024 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

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): May 29, 2024 GOLUB CAPITAL BDC, INC.

May 10, 2024 425

Filed by Golub Capital BDC, Inc.

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-6(b) of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 File No. of Related Registration Statement: 333-277325 On May 7, 2024, Golub Capital BDC, Inc. (“GBDC”) held a conference call to discuss GBDC's financial results f

May 8, 2024 425

Filed by Golub Capital BDC, Inc.

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-6(b) of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 File No. of Related Registration Statement: 333-277325 Attached hereto as Exhibit 1 is a GBDC Merger Investor Presentation GOLUB CAPITAL BDC, INC. (“GBDC”) OVERVIEW

May 6, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 6, 2024 GOLUB CAPITAL BDC, INC.

May 6, 2024 10-Q

______________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

May 6, 2024 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED MARCH 31, 2024 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED MARCH 31, 2024 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,” “will,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “anticipate,” “predict,” “potential,” “plan” or similar words

May 6, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 6, 2024 GOLUB CAPITAL BDC, INC.

May 6, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2024 Second Quarter Financial Results with Third Consecutive Quarter of Highest-Ever Adjusted Net Investment Income Declares a Fiscal Year 2024 Second Quarter Supplemental Distribution of $0.06 Per Share

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2024 Second Quarter Financial Results with Third Consecutive Quarter of Highest-Ever Adjusted Net Investment Income Declares a Fiscal Year 2024 Second Quarter Supplemental Distribution of $0.06 Per Share in Addition to Previously Declared $0.39 Per Share Quarterly Distribution NEW YORK, NY, May 6, 2024 - Golub Capital BDC, Inc., a business

April 30, 2024 425

2024 GBDC Proxy Reminder Letter p. 1 YOUR VOTE IS IMPORTANT Dear Stockholder: According to our latest records, we have not yet received your voting instructions for the Special Meeting of Stockholders of Golub Capital BDC, Inc. (“GBDC” or the “Compan

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-6(b) of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 File No. of Related Registration Statement: 333-277325 2024 GBDC Proxy Reminder Letter p. 1 YOUR VOTE IS IMPORTANT Dear Stockholder: According to our latest records

April 22, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 22, 2024 GOLUB CAPITAL BDC, INC.

April 22, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Preliminary Fiscal Year 2024 Second Quarter Financial Results and Declares Fiscal Year 2024 Third Quarter Distribution of $0.39 Per Share NEW YORK, NY, April 22, 2024 - Golub Capital BDC, Inc., a business development

gbdcfy2024q2earningspre- Golub Capital BDC, Inc. Announces Preliminary Fiscal Year 2024 Second Quarter Financial Results and Declares Fiscal Year 2024 Third Quarter Distribution of $0.39 Per Share NEW YORK, NY, April 22, 2024 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced estimated financial results for its second fiscal quarter ended March 31, 2024. GBDC

April 18, 2024 425

1 YOUR VOTE IS IMPORTANT GOLUB CAPITAL BDC, INC. 2024 Special Meeting May 29, 2024 VOTE NOW Why Should I Vote? By voting FOR the merger-related proposal, you are providing GBDC with a number of critical benefits that are compelling to GBDC 2 stockhol

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-6(b) of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 File No. of Related Registration Statement: 333-277325 1 YOUR VOTE IS IMPORTANT GOLUB CAPITAL BDC, INC. 2024 Special Meeting May 29, 2024 VOTE NOW Why Should I Vote

April 17, 2024 CORRESP

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1900 K Street, N.W. Washington, DC 20006-1100 +1 202 261 3300 Main +1 202 261 3333 Fax www.dechert.com MATTHEW J. CARTER [email protected] +1 202 261 3395 Direct +1 202 261 3184 Fax April 12, 2024 VIA EDGAR U.S. Securities and Exchange Commission Division of Investment Management 100 F Street, N.E. Washington, DC 20549 Attention: Jeffrey A. Foor Jeffrey W. Long Keith O’Connell Re: Golub C

April 15, 2024 424B3

GOLUB CAPITAL BDC, INC. 200 Park Avenue, 25th Floor New York, NY 10166 MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT

Filed pursuant to Rule 424(b)(3) File No. 333-277325 GOLUB CAPITAL BDC, INC. 200 Park Avenue, 25th Floor New York, NY 10166 MERGER PROPOSED—YOUR VOTE IS VERY IMPORTANT April 15, 2024 Dear Stockholder: You are cordially invited to attend the Special Meeting of Stockholders (the “GBDC Special Meeting”) of Golub Capital BDC, Inc. (“GBDC”), to be held virtually on May 29, 2024 at 9:00 a.m., Eastern Ti

April 12, 2024 EX-14.(A)

Consent of Ernst & Young LLP*

Exhibit (14)(a) Consent of Independent Registered Public Accounting Firm We consent to the reference to our firm under the captions “Experts” and “Senior Securities” in the Joint Proxy Statement/Prospectus included in this Pre-Effective Amendment No.

April 12, 2024 EX-4.(B)

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.*

Exhibit 4(b) AMENDMENT NO. 1 TO AGREEMENT AND PLAN OF MERGER THIS AMENDMENT NO. 1 (this “Amendment”) to Agreement and Plan of Merger, dated as of January 16, 2024 (the “Original Agreement”) is made and entered into as of April 12, 2024, by and among Golub Capital BDC 3, Inc., a Maryland corporation, Golub Capital BDC, Inc., a Delaware corporation (“GBDC”), Park Avenue Subsidiary Inc., a Maryland c

April 12, 2024 EX-FILING FEES

Filing Fee Table.*

Exhibit 18 Calculation of Filing Fee Tables Form N-14 (Form Type) Golub Capital BDC, Inc.

April 12, 2024 EX-14.(B)

Report of Ernst & Young LLP on GBDC 3 Supplemental Information*

Exhibit 14(b) Report of Independent Registered Public Accounting Firm on Supplemental Information To the Shareholders and the Board of Directors of Golub Capital BDC 3, Inc.

April 12, 2024 EX-14.(C)

Report of Ernst & Young LLP on GBDC Supplemental Information*

Exhibit 14(c) Report of Independent Registered Public Accounting Firm on Supplemental Information To the Shareholders and the Board of Directors of Golub Capital BDC, Inc.

April 12, 2024 EX-17.(D)

Form of Proxy Card of Golub Capital BDC 3, Inc.*

Exhibit 17.(d) Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLY THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. GOLUB CAPITAL BDC 3, INC. 200 PARK AVENUE 25TH FLOOR NEW YORK, NY 10166 V34224-S87622-Z87538 For Against Abstain 1. To approve the

April 12, 2024 EX-12

Form of Opinion and Consent of Dechert LLP.*

Exhibit 12 , 2024 Golub Capital BDC 3, Inc. 200 Park Avenue New York, New York 10166 Golub Capital BDC, Inc. 200 Park Avenue New York, New York 10166 Ladies and Gentlemen: You have requested our opinion regarding certain federal income tax consequences to Golub Capital BDC, Inc., a business development company organized as a Delaware corporation (the “Acquiring Fund”), to Golub Capital BDC 3, Inc.

April 12, 2024 EX-17.(C)

Form of Proxy Card of Golub Capital BDC, Inc.*

Exhibit 17(c) Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLY THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED.

April 12, 2024 N-14 8C/A

Power of Attorney (Included on and incorporated by reference to the signature page to the Pre-Effective Amendment No. 1 to the Registrant’s Registration Statement on Form N-14 (File No. 333-277325), filed on April 12, 2024).

As filed with the Securities and Exchange Commission on April 12, 2024 Registration No.

April 4, 2024 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): April 4, 2024 GOLUB CAPITAL BDC, IN

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): April 4, 2024 GOLUB CAPITAL BDC, INC.

April 4, 2024 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2024 Second Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2024 Second Quarter Results NEW YORK, NY, April 4, 2024 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended March 31, 2024 on Monday, May 6, 2024 after the close of the financial markets. Golub Capital B

March 8, 2024 EX-99.1

NOTICE OF REDEMPTION TO THE HOLDERS OF THE 3.375% Notes due 2024 of Golub Capital BDC, Inc. (CUSIP No. 38173M AA0)* Redemption Date: April 8, 2024

Exhibit 99.1 NOTICE OF REDEMPTION TO THE HOLDERS OF THE 3.375% Notes due 2024 of Golub Capital BDC, Inc. (CUSIP No. 38173M AA0)* Redemption Date: April 8, 2024 NOTICE IS HEREBY GIVEN, pursuant to Section 11.04 of the Indenture dated as of October 2, 2020 (the “Base Indenture”), between Golub Capital BDC, Inc., a Delaware corporation (the “Company”), and U.S. Bank Trust Company, National Associatio

March 8, 2024 8-K

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): March 8, 2024 GOLUB CAPITAL BDC, INC. (Exact name of Registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or other jurisdiction of incorporation) (Commission F

February 23, 2024 N-14 8C

As filed with the Securities and Exchange Commission on February 23, 2024

N-14 8C 1 tm246704d1n14.htm N-14 As filed with the Securities and Exchange Commission on February 23, 2024 Registration No. 333- UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM N-14 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 Pre-Effective Amendment No. ¨ Post-Effective Amendment No. ¨ (Check appropriate box or boxes) GOLUB CAPITAL BDC, INC. (Exact Name of

February 23, 2024 EX-FILING FEES

Filing Fee Table*

Exhibit 18 Calculation of Filing Fee Tables Form N-14 (Form Type) Golub Capital BDC, Inc.

February 23, 2024 EX-99.(17)(A)

Consent of Keefe, Bruyette & Woods, Inc. (Incorporated by reference to Exhibit 17(a) filed with the Registrant’s Registration Statement on Form N-14 (File No. 333-277325), filed on February 23, 2024).

Exhibit (17)(a) CONSENT OF KEEFE, BRUYETTE & WOODS, INC. We hereby consent to the inclusion of our opinion letter to (i) the committee of the independent directors of the Board of Directors (the “Board”) of Golub Capital BDC 3, Inc. (“GBDC 3”) and (ii) the Board of GBDC 3, as Annex C to the Joint Proxy Statement/Prospectus which forms a part of the Registration Statement on Form N-14 filed on the

February 23, 2024 EX-99.(14)(A)

Consent of Ernst & Young LLP*

Exhibit (14)(a) Consent of Independent Registered Public Accounting Firm We consent to the reference to our firm under the captions “Experts” and “Senior Securities” in the Joint Proxy Statement/Prospectus included in this Registration Statement (Form N-14) of Golub Capital BDC, Inc.

February 23, 2024 EX-99.(12)

Form of Opinion and Consent of Dechert LLP.*

Exhibit 12 , 2024 Golub Capital BDC 3, Inc. 200 Park Avenue New York, New York 10166 Golub Capital BDC, Inc. 200 Park Avenue New York, New York 10166 Ladies and Gentlemen: You have requested our opinion regarding certain federal income tax consequences to Golub Capital BDC, Inc., a business development company organized as a Delaware corporation (the “Acquiring Fund”), to Golub Capital BDC 3, Inc.

February 23, 2024 EX-14.(C)

Report of Ernst & Young LLP on GBDC Supplemental Information*

Exhibit 14(c) Report of Independent Registered Public Accounting Firm on Supplemental Information To the Shareholders and the Board of Directors of Golub Capital BDC, Inc.

February 23, 2024 EX-14.(B)

Report of Ernst & Young LLP on GBDC 3 Supplemental Information*

Exhibit 14(b) Report of Independent Registered Public Accounting Firm on Supplemental Information To the Shareholders and the Board of Directors of Golub Capital BDC 3, Inc.

February 23, 2024 EX-99.(17)(B)

Consent of Morgan Stanley & Co. LLC (Incorporated by reference to Exhibit 17(b) filed with the Registrant’s Registration Statement on Form N-14 (File No. 333-277325), filed on February 23, 2024).

Exhibit (17)(b) Consent of Morgan Stanley & Co. LLC We hereby consent to the use in the Registration Statement of Golub Capital BDC, Inc. (“GBDC”) on Form N-14 (the “Registration Statement”) and in the Joint Proxy Statement/Prospectus of GBDC and Golub Capital BDC 3, Inc. (“GBDC 3”), which is part of the Registration Statement, of our written opinion, dated January 16, 2024, appearing as Annex D t

February 9, 2024 425

Filed by Golub Capital BDC, Inc.

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-12 of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 On February 6, 2024, Golub Capital BDC, Inc. (“GBDC”) held a conference call to discuss GBDC's financial results for the quarter ended December 31, 2023. The conferen

February 9, 2024 425

Filed by Golub

Filed by Golub Capital BDC 3, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-12 of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 On February 7, 2024, Golub Capital BDC 3, Inc. (“GBDC 3”) held a conference call to discuss GBDC 3's financial results for the quarter ended December 31, 2023. The

February 8, 2024 425

Process for Evaluating Potential Merger with GBDC 3 3 Good for existing stockholders Good for new stockholders Good for GBDC GBDC’s Board of Directors — along with the independent directors’ financial advisor and legal counsel — has gone through a ca

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-12 of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 Attached hereto as Exhibit 1 is a GBDC Merger Investor Presentation. GOLUB CAPITAL BDC, INC. (“GBDC”) OVERVIEW OF PROPOSED MERGER WITH GOLUB CAPITAL BDC 3, INC. (“GBD

February 6, 2024 8-K

Submission of Matters to a Vote of Security Holders

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): February 2, 2024 GOLUB CAPITAL BDC, INC.

February 5, 2024 10-Q

______________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

February 5, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2024 First Quarter Financial Results with Second Consecutive Quarter of Highest-Ever Adjusted Net Investment Income Declares a Fiscal Year 2024 First Quarter Supplemental Distribution of $0.07 Per Share i

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2024 First Quarter Financial Results with Second Consecutive Quarter of Highest-Ever Adjusted Net Investment Income Declares a Fiscal Year 2024 First Quarter Supplemental Distribution of $0.07 Per Share in Addition to Previously Declared $0.39 Per Share Quarterly Distribution NEW YORK, NY, February 5, 2024 - Golub Capital BDC, Inc., a busi

February 5, 2024 425

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): February 5, 2024 GOLUB CAPITAL BDC,

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-12 of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 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 D

February 5, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 5, 2024 GOLUB CAPITAL BDC, INC.

February 5, 2024 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED DECEMBER 31, 2023 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “mi

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED DECEMBER 31, 2023 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,” “will,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “anticipate,” “predict,” “potential,” “plan” or similar wo

February 5, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 5, 2024 GOLUB CAPITAL BDC, INC.

February 1, 2024 EX-1.1

Underwriting Agreement, dated January 29, 2024, by and among Golub Capital BDC, Inc., GC Advisors LLC, Golub Capital LLC, and Wells Fargo Securities, LLC, J.P. Morgan Securities LLC, and SMBC Nikko Securities America, Inc., as representatives of the underwriters named in Exhibit A thereto

Exhibit 1.1 GOLUB CAPITAL BDC, INC. $600,000,000 Aggregate Principal Amount of 6.000% Notes due 2029 UNDERWRITING AGREEMENT Dated: January 29, 2024 GOLUB CAPITAL BDC, INC. $600,000,000 Aggregate Principal Amount of 6.000% Notes due 2029 UNDERWRITING AGREEMENT January 29, 2024 Wells Fargo Securities, LLC J.P. Morgan Securities LLC SMBC Nikko Securities America, Inc. as representatives of the underw

February 1, 2024 EX-4.2

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 Registrant's Current Report on 8-K (File No. 814-00794), filed on February 1, 2024).

Exhibit 4.2 FIFTH SUPPLEMENTAL INDENTURE between GOLUB CAPITAL BDC, INC. and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee Dated as of February 1, 2024 FIFTH SUPPLEMENTAL INDENTURE THIS FIFTH SUPPLEMENTAL INDENTURE (this “Fifth Supplemental Indenture”), dated as of February 1, 2024, is between Golub Capital BDC, Inc., a Delaware corporation (the “Company”), and U.S. Bank Trust Company,

February 1, 2024 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): January 29, 2024 GOLUB CAPITAL BDC, INC. (Exact name of Registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or other jurisdiction of incorporation) (Commissio

January 30, 2024 424B2

$600,000,000 GOLUB CAPITAL BDC, INC. 6.000% Notes due 2029

Table of Contents Filed Pursuant to Rule 424(b)(2)  Registration No. 333-265509 PROSPECTUS SUPPLEMENT (To Prospectus dated June 9, 2022) $600,000,000 GOLUB CAPITAL BDC, INC. 6.000% Notes due 2029 We are offering for sale $600,000,000 in aggregate principal amount of 6.000% notes due 2029, which we refer to as the Notes. The Notes will mature on July 15, 2029. We will pay interest on the Notes semi

January 30, 2024 EX-FILING FEES

Calculation of Filing Fee Tables (Form Type) Golub Capital BDC, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 EX. FILING FEES Calculation of Filing Fee Tables 424(b)(2) (Form Type) Golub Capital BDC, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of

January 29, 2024 FWP

Golub Capital BDC, Inc. 6.000% Notes due 2029 PRICING TERM SHEET January 29, 2024

Filed Pursuant to Rule 433 Issuer Free Writing Prospectus dated January 29, 2024 Relating to Preliminary Prospectus Supplement dated January 29, 2024 and Prospectus dated June 9, 2022 Registration No.

January 29, 2024 424B2

Subject to Completion Preliminary Prospectus Supplement dated January 29, 2024

The information in this preliminary prospectus supplement is not complete and may be changed.

January 19, 2024 425

Filed by Golub Capital BDC, Inc.

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-12 of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 On January 17, 2024, Golub Capital BDC, Inc. (“GBDC”) held a conference call to discuss GBDC's proposed acquisition of Golub Capital BDC 3, Inc. ("GBDC 3"). The follo

January 17, 2024 EX-10.1

Waiver Agreement to the Fourth Amended and Restated Investment Advisory Agreement by and Between Golub Capital BDC, Inc. and GC Advisors LLC (Incorporated by reference to Exhibit 10.1 to Registrant's Current Report on 8-K (File No. 814-00794), filed on January 17, 2024).

Exhibit 10.1 Golub Capital BDC, Inc. 200 Park Avenue, 25th Floor New York, New York 10166 Re: Investment Advisory Agreement between Golub Capital BDC, Inc. and GC Advisors LLC This waiver letter agreement (this “Waiver Letter”) to the Fourth Amended and Restated Investment Advisory Agreement, dated as of August 3, 2023 (the “Agreement”), by and between Golub Capital BDC, Inc., a Delaware corporati

January 17, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Preliminary Fiscal Year 2024 First Quarter Financial Results and Declares Increased Quarterly Distribution to $0.39 Per Share

Exhibit 99.1 Golub Capital BDC, Inc. Announces Preliminary Fiscal Year 2024 First Quarter Financial Results and Declares Increased Quarterly Distribution to $0.39 Per Share NEW YORK, NY, January 17, 2024 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced estimated financial results for its first fiscal quarter ended December 31, 2023. The Company has elected

January 17, 2024 EX-10.1

Waiver Agreement to the Fourth Amended and Restated Investment Advisory Agreement by and between Golub Capital BDC, Inc. and GC Advisors LLC.

Exhibit 10.1 Golub Capital BDC, Inc. 200 Park Avenue, 25th Floor New York, New York 10166 Re: Investment Advisory Agreement between Golub Capital BDC, Inc. and GC Advisors LLC This waiver letter agreement (this “Waiver Letter”) to the Fourth Amended and Restated Investment Advisory Agreement, dated as of August 3, 2023 (the “Agreement”), by and between Golub Capital BDC, Inc., a Delaware corporati

January 17, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Merger Agreement With Golub Capital BDC 3, Inc.

Exhibit 99.1 Golub Capital BDC, Inc. Announces Merger Agreement With Golub Capital BDC 3, Inc. NEW YORK, January 17, 2024 — Golub Capital BDC, Inc. (“GBDC,” or the “Company”), a business development company (Nasdaq: GBDC), announced today that it entered into a definitive merger agreement with Golub Capital BDC 3, Inc. (“GBDC 3”), with GBDC as the surviving company, subject to certain stockholder

January 17, 2024 425

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): January 16, 2024 GOLUB CAPITAL BDC,

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-12 of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 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 D

January 17, 2024 EX-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.

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER among GOLUB CAPITAL BDC, INC., PARK AVENUE SUBSIDIARY INC., GOLUB CAPITAL BDC 3, INC., GC ADVISORS LLC and (solely for purposes of Section 1.9) GOLUB CAPITAL LLC Dated as of January 16, 2024 Table of Contents Page Article I THE MERGER 6 1.1 The Merger 6 1.2 Closing 6 1.3 Effective Time 6 1.4 Effects of the Merger 7 1.5 Conversion of Capital Stock 7 1.6 The

January 17, 2024 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): January 16, 2024 GOLUB CAPITAL BDC,

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): January 16, 2024 GOLUB CAPITAL BDC, INC.

January 17, 2024 EX-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).

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER among GOLUB CAPITAL BDC, INC., PARK AVENUE SUBSIDIARY INC., GOLUB CAPITAL BDC 3, INC., GC ADVISORS LLC and (solely for purposes of Section 1.9) GOLUB CAPITAL LLC Dated as of January 16, 2024 Table of Contents Page Article I THE MERGER 6 1.1 The Merger 6 1.2 Closing 6 1.3 Effective Time 6 1.4 Effects of the Merger 7 1.5 Conversion of Capital Stock 7 1.6 The

January 17, 2024 425

GOLUB CAPITAL BDC, INC. (“GBDC”) OVERVIEW OF PROPOSED MERGER WITH GOLUB CAPITAL BDC 3, INC. (“GBDC 3”) JANUARY 2024 CONFIDENTIAL | © 2024 GOLUB CAPITAL LLC Process for Evaluating Potential Merger with GBDC 3 Good for existing stockholders Good for ne

Filed by Golub Capital BDC, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed under Rule 14a-12 of the Securities Exchange Act of 1934 Subject Company: Golub Capital BDC 3, Inc. Commission File No. 814-01244 Attached hereto as Exhibit 1 is a GBDC Merger Investor Presentation. Exhibit 1 GOLUB CAPITAL BDC, INC. (“GBDC”) OVERVIEW OF PROPOSED MERGER WITH GOLUB CAPITAL BDC 3,

January 17, 2024 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): January 17, 2024 GOLUB CAPITAL BDC,

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): January 17, 2024 GOLUB CAPITAL BDC, INC.

January 17, 2024 EX-99.1

Golub Capital BDC, Inc. Announces Merger Agreement With Golub Capital BDC 3, Inc.

Exhibit 99.1 Golub Capital BDC, Inc. Announces Merger Agreement With Golub Capital BDC 3, Inc. NEW YORK, January 17, 2024 — Golub Capital BDC, Inc. (“GBDC,” or the “Company”), a business development company (Nasdaq: GBDC), announced today that it entered into a definitive merger agreement with Golub Capital BDC 3, Inc. (“GBDC 3”), with GBDC as the surviving company, subject to certain stockholder

January 4, 2024 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 4, 2024 GOLUB CAPITAL BDC, INC.

January 4, 2024 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2024 First Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2024 First Quarter Results NEW YORK, NY, January 4, 2024 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended December 31, 2023 on Monday, February 5, 2024 after the close of the financial markets. Golub

December 15, 2023 DEF 14A

SCHEDULE 14A (RULE 14a-101) Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A (RULE 14a-101) Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Definitive Proxy Statement ☐ Definitive Additional Material ☐ Soliciting Material Pursuant to Rule 14a-12 Golub Capital BDC, Inc.

December 15, 2023 DEFA14A

SCHEDULE 14A (RULE 14a-101) Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A (RULE 14a-101) Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Definitive Proxy Statement ☒ Definitive Additional Material ☐ Soliciting Material Pursuant to Rule 14a-12 Golub Capital BDC, Inc.

December 5, 2023 EX-1.1

Underwriting Agreement, dated November 30, 2023, by and among Golub Capital BDC, Inc., GC Advisors LLC, Golub Capital LLC, and SMBC Nikko Securities America, Inc., J.P. Morgan Securities LLC, and Wells Fargo Securities, LLC, as representatives of the underwriters named in Exhibit A thereto

Exhibit 1.1 GOLUB CAPITAL BDC, INC. $450,000,000 Aggregate Principal Amount of 7.050% Notes due 2028 UNDERWRITING AGREEMENT Dated: November 30, 2023 GOLUB CAPITAL BDC, INC. $450,000,000 Aggregate Principal Amount of 7.050% Notes due 2028 UNDERWRITING AGREEMENT November 30, 2023 SMBC Nikko Securities America, Inc. J.P. Morgan Securities LLC Wells Fargo Securities, LLC as representatives of the unde

December 5, 2023 EX-4.2

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 Registrant's Current Report on 8-K (File No. 814-00794), filed on December 5, 2023).

Exhibit 4.2   FOURTH SUPPLEMENTAL INDENTURE   between   GOLUB CAPITAL BDC, INC.   and   U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION,   as Trustee   Dated as of December 5, 2023     FOURTH SUPPLEMENTAL INDENTURE   THIS FOURTH SUPPLEMENTAL INDENTURE (this “Fourth Supplemental Indenture”), dated as of December 5, 2023, is between Golub Capital BDC, Inc., a Delaware corporation (the “Company”), and

December 5, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): November 30, 2023 GOLUB CAPITAL BDC, INC. (Exact name of Registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or other jurisdiction of incorporation) (Commissi

December 1, 2023 424B2

$450,000,000 GOLUB CAPITAL BDC, INC. 7.050% Notes due 2028

Table of Contents Filed pursuant to Rule 424(b)(2) File No. 333-265509 PROSPECTUS SUPPLEMENT (To Prospectus dated June 9, 2022) $450,000,000 GOLUB CAPITAL BDC, INC. 7.050% Notes due 2028 We are offering for sale $450,000,000 in aggregate principal amount of 7.050 % notes due 2028, which we refer to as the Notes. The Notes will mature on December 5, 2028. We will pay interest on the Notes semi-annu

December 1, 2023 EX-FILING FEES

Calculation of Filing Fee Tables (Form Type) Golub Capital BDC, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 EX. FILING FEES Calculation of Filing Fee Tables 424(b)(2) (Form Type) Golub Capital BDC, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of

November 30, 2023 424B2

Subject to Completion Preliminary Prospectus Supplement dated November 30, 2023

The information in this preliminary prospectus supplement is not complete and may be changed.

November 30, 2023 FWP

Golub Capital BDC, Inc. 7.050% Notes due 2028 PRICING TERM SHEET November 30, 2023

Filed Pursuant to Rule 433 Issuer Free Writing Prospectus dated November 30, 2023 Relating to Preliminary Prospectus Supplement dated November 30, 2023 and Prospectus dated June 9, 2022 Registration No.

November 20, 2023 EX-99.1

GOLUB CAPITAL BDC, INC. (THE “COMPANY”) INVESTOR PRIVACY NOTICE

EXHIBIT 99.1 GOLUB CAPITAL BDC, INC. (THE “COMPANY”) INVESTOR PRIVACY NOTICE Maintaining the confidentiality of the personal information of our current and prospective investors is one of our highest priorities. This notice sets forth the type of personal information we collect, how that information is used by us, and how we protect your personal information. In this Investor Privacy Notice, “we”,

November 20, 2023 EX-14.1

CODE OF ETHICS GOLUB CAPITAL BDC, INC. GOLUB CAPITAL DIRECT LENDING CORPORATION GOLUB CAPITAL BDC 3, INC. GOLUB CAPITAL BDC 4, INC. GOLUB CAPITAL DIRECT LENDING UNLEVERED CORPORATION GOLUB CAPITAL PRIVATE CREDIT FUND GC ADVISORS LLC

CODE OF ETHICS FOR GOLUB CAPITAL BDC, INC. GOLUB CAPITAL DIRECT LENDING CORPORATION GOLUB CAPITAL BDC 3, INC. GOLUB CAPITAL BDC 4, INC. GOLUB CAPITAL DIRECT LENDING UNLEVERED CORPORATION GOLUB CAPITAL PRIVATE CREDIT FUND GC ADVISORS LLC Section I Statement of General Fiduciary Principles This Code of Ethics (the “Code”) has been adopted by each of Golub Capital BDC, Inc., Golub Capital BDC 3, Inc.

November 20, 2023 EX-4.7

DESCRIPTION OF SECURITIES

Exhibit 4.7 DESCRIPTION OF SECURITIES As of September 30, 2023, Golub Capital BDC, Inc. (“we,” “our,” “us” or the “Company”) had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): our common stock, par value $0.001 per share. For purposes of this exhibit, references to “we,” “our” and “us” refer only to Golub Capital BDC, In

November 20, 2023 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2023 Fourth Quarter Financial Results with Highest-Ever Adjusted Net Investment Income Declares Quarterly Distribution of $0.37 Per Share, and a Fiscal Year 2023 Fourth Quarter Supplemental Distribution o

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2023 Fourth Quarter Financial Results with Highest-Ever Adjusted Net Investment Income Declares Quarterly Distribution of $0.37 Per Share, and a Fiscal Year 2023 Fourth Quarter Supplemental Distribution of $0.07 Per Share NEW YORK, NY, November 20, 2023 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announc

November 20, 2023 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED SEPTEMBER 30, 2023 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “m

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED SEPTEMBER 30, 2023 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,” “will,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “anticipate,” “predict,” “potential,” “plan” or similar w

November 20, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 20, 2023 GOLUB CAPITAL BDC, INC.

November 20, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Form 10-K ______________________________________________________________________________________________________ (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE S

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Form 10-K (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30, 2023 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00794 GOLUB CAPITAL BDC, INC.

November 20, 2023 EX-21.1

SUBSIDIARIES OF GOLUB CAPITAL BDC, INC. Name Jurisdiction Golub Capital BDC CLO III LLC Delaware Golub Capital BDC CLO III Depositor LLC Delaware Golub Capital BDC CLO 2014 LLC Delaware Golub Capital BDC Holdings, LLC Delaware GBDC Quick Quack Coinve

EXHIBIT 21.1 SUBSIDIARIES OF GOLUB CAPITAL BDC, INC. Name Jurisdiction Golub Capital BDC CLO III LLC Delaware Golub Capital BDC CLO III Depositor LLC Delaware Golub Capital BDC CLO 2014 LLC Delaware Golub Capital BDC Holdings, LLC Delaware GBDC Quick Quack Coinvest LLC Delaware GBDC Holdings Coinvest, Inc. Delaware GBDC Holdings ED Coinvest, Inc. Delaware GCIC Holdings LLC Delaware GCIC Quick Quac

November 20, 2023 EX-97.1

BUSINESS.30319083.2 Exhibit 97.1 GOLUB CAPITAL BDC, INC. CLAWBACK POLICY The Board of Directors (the “Board”) of Golub Capital BDC, Inc., a Delaware corporation (the “Company”), believes that it is in the best interests of the Company and its stockho

BUSINESS.30319083.2 Exhibit 97.1 GOLUB CAPITAL BDC, INC. CLAWBACK POLICY The Board of Directors (the “Board”) of Golub Capital BDC, Inc., a Delaware corporation (the “Company”), believes that it is in the best interests of the Company and its stockholders to adopt this Clawback Policy (this “Policy”), which provides for the recovery of Incentive-Based Compensation received by Covered Executives, i

November 20, 2023 EX-14.2

GC ADVISORS LLC CODE OF ETHICS

GC ADVISORS LLC CODE OF ETHICS General This Code of Ethics for the Adviser supplements (i) the Joint Code of Ethics for Golub Capital BDC, Inc.

November 20, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 20, 2023 GOLUB CAPITAL BDC, INC.

October 17, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 17, 2023 GOLUB CAPITAL BDC, INC.

October 17, 2023 EX-99.1

Golub Capital BDC, Inc. Announces Preliminary Fiscal Year 2023 Fourth Quarter Financial Results GBDC Results Driven by Highest-Ever Adjusted Net Investment Income Per Share, Net Realized and Unrealized Gains, and Reduced Management Fee Rate NEW YORK,

Golub Capital BDC, Inc. Announces Preliminary Fiscal Year 2023 Fourth Quarter Financial Results GBDC Results Driven by Highest-Ever Adjusted Net Investment Income Per Share, Net Realized and Unrealized Gains, and Reduced Management Fee Rate NEW YORK, NY, October 17, 2023 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced estimated financial results for its fo

October 10, 2023 424B3

$250,000,000 GOLUB CAPITAL BDC, INC. Common Stock

Table of Contents Filed Pursuant to Rule 424(b)(3)  Registration No.: 333-265509 PROSPECTUS SUPPLEMENT (To Prospectus dated June 9, 2022) $250,000,000 GOLUB CAPITAL BDC, INC. Common Stock We are an externally managed, closed-end, non-diversified management investment company that has elected to be regulated as a business development company under the Investment Company Act of 1940, as amended, or

October 10, 2023 EX-1.1

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 (Incorporated by reference to Exhibit 1.1 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on October 10, 2023).

Exhibit 1.1 GOLUB CAPITAL BDC, INC. Shares of Common Stock, $0.001 par value per share EQUITY DISTRIBUTION AGREEMENT October 6, 2023 Keefe, Bruyette & Woods, Inc. 787 Seventh Avenue, 5th Floor New York, New York 10019 Regions Securities LLC 615 South College Street, Suite 600 Charlotte, NC 28202 Ladies and Gentlemen: Golub Capital BDC, Inc., a Delaware corporation (the “Company”), GC Advisors LLC,

October 10, 2023 EX-FILING FEES

Calculation of Filing Fee Tables (Form Type) Golub Capital BDC, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 EX. FILING FEES Calculation of Filing Fee Tables 424(b)(3) (Form Type) Golub Capital BDC, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities Security Type Security Class Title Fee Calculation or Carry Forward Rule Amount Registered Proposed Maximum Offering Price Per Unit Maximum Aggregate Offering Price Fee Rate Amount of

October 10, 2023 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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): October 6, 2023 GOLUB CAPITAL BDC, INC.

October 5, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 5, 2023 GOLUB CAPITAL BDC, INC.

October 5, 2023 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2023 Fourth Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2023 Fourth Quarter Results NEW YORK, NY, October 5, 2023 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter and the year ended September 30, 2023 on Monday, November 20, 2023 after the close of the financial

August 7, 2023 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): August 7, 2023 GOLUB CAPITAL BDC, I

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): August 7, 2023 GOLUB CAPITAL BDC, INC.

August 7, 2023 8-K

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): August 7, 2023 GOLUB CAPITAL BDC, INC.

August 7, 2023 EX-99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2023 Third Quarter Financial Results with Record Adjusted Net Investment Income Declares Increased Quarterly Distribution to $0.37 Per Share and a Third Quarter Supplemental Distribution of $0.04 Per Shar

Exhibit 99.1 Golub Capital BDC, Inc. Announces Fiscal Year 2023 Third Quarter Financial Results with Record Adjusted Net Investment Income Declares Increased Quarterly Distribution to $0.37 Per Share and a Third Quarter Supplemental Distribution of $0.04 Per Share Announces Management Fee Reduction NEW YORK, NY, August 7, 2023 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC

August 7, 2023 EX-99.2

GOLUB CAPITAL BDC, INC. ANNOUNCES MANAGEMENT FEE REDUCTION AUGUST 2023 © 2023 GOLUB CAPITAL LLC Disclaimer 2 Some of the statements in this presentation constitute forward-looking statements, which relate to future events or our future performance or

shareholderalignedmanage GOLUB CAPITAL BDC, INC. ANNOUNCES MANAGEMENT FEE REDUCTION AUGUST 2023 © 2023 GOLUB CAPITAL LLC Disclaimer 2 Some of the statements in this presentation constitute forward-looking statements, which relate to future events or our future performance or financial condition. The forward-looking statements contained in this presentation involve risks and uncertainties, includin

August 7, 2023 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED JUNE 30, 2023 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,

gbdcq3fy2023earningspres Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC.

August 7, 2023 EX-99.2

Golub Capital BDC, Inc. Announces Shareholder-Aligned Management Fee Reduction

Exhibit 99.2 Golub Capital BDC, Inc. Announces Shareholder-Aligned Management Fee Reduction NEW YORK, August 7, 2023 – Golub Capital BDC, Inc. (“GBDC” or the “Company”), a business development company (Nasdaq: GBDC), today announced that the Company’s Board of Directors approved a permanent reduction in the base management fee rate that the Company pays to its investment adviser, GC Advisors LLC,

August 7, 2023 10-Q

______________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

August 7, 2023 EX-10.3

Fourth Amended and Restated Investment Advisory Agreement, dated August 3, 2023, by and between the Registrant and GC Advisors LLC (Incorporated by reference to Exhibit 10.3 to the Registrant’s Quarterly Report on Form 10-Q (File No. 814-00794), filed on August 7, 2023).

Exhibit 10.3 FOURTH AMENDED AND RESTATED INVESTMENT ADVISORY AGREEMENT BETWEEN GOLUB CAPITAL BDC, INC. AND GC ADVISORS LLC Fourth Amended and Restated Investment Advisory Agreement made this 3rd day of August, 2023 (this “Agreement”) and effective as of July 1, 2023, by and between GOLUB CAPITAL BDC, INC., a Delaware corporation (the “Corporation”), and GC ADVISORS LLC, a Delaware limited liabilit

July 11, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 11, 2023 GOLUB CAPITAL BDC, INC.

July 11, 2023 EX-99.1

GOLUB CAPITAL BDC, INC. ANNOUNCES $110.7 MILLION IN NEW MIDDLE-MARKET ORIGINATIONS FOR ITS FISCAL YEAR 2023 THIRD QUARTER

Exhibit 99.1 GOLUB CAPITAL BDC, INC. ANNOUNCES $110.7 MILLION IN NEW MIDDLE-MARKET ORIGINATIONS FOR ITS FISCAL YEAR 2023 THIRD QUARTER NEW YORK, NY, July 11, 2023 - Golub Capital BDC, Inc. (“GBDC”) (Nasdaq: GBDC, www.golubcapitalbdc.com), a business development company, today announced that it originated $110.7 million in new middle-market investment commitments during the three months ended June

July 6, 2023 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2023 Third Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2023 Third Quarter Results NEW YORK, NY, July 6, 2023 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended June 30, 2023 on Monday, August 7, 2023 after the close of the financial markets. Golub Capital B

July 6, 2023 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): July 6, 2023 GOLUB CAPITAL BDC, INC

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): July 6, 2023 GOLUB CAPITAL BDC, INC.

June 30, 2023 EX-10.1

First Supplemental Indenture, dated as of June 30, 2023, by and between Golub Capital BDC CLO III LLC, as Issuer, and U.S. Bank Trust Company, National Association, as Trustee, and consented to by GC Advisors LLC, as Collateral Manager (Incorporated by reference to Exhibit 10.1 to the Registrant's Current Report on Form 8-K (File No. 814-00794), filed on June 30, 2023).

Exhibit 10.1 EXECUTION VERSION FIRST SUPPLEMENTAL INDENTURE dated as of June 30, 2023 among GOLUB CAPITAL BDC CLO III LLC, as Issuer and U.S. BANK TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee to the Indenture, dated as of November 16, 2018, between the Issuer and the Trustee THIS FIRST SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 30, 2023, between GOLUB CAPITAL BDC C

June 30, 2023 EX-10.2

Second Supplemental Indenture, dated as of June 30, 2023, by and between GCIC CLO II LLC, as Issuer, and The Bank of New York Mellon Trust Company, National Association, as Trustee, and consented to by GC Advisors LLC, as Collateral Manager and The Bank of New York Mellon Trust Company, National Association, as Collateral Administrator. (Incorporated by reference to Exhibit 10.2 to the Registrant’s Current report on Form 8-K (File No. 814-00794), filed on June 30, 2023).

Exhibit 10.2 EXECUTION VERSION SECOND SUPPLEMENTAL INDENTURE dated as of June 30, 2023 among GCIC CLO II LLC, as Issuer and THE BANK OF NEW YORK MELLON TRUST COMPANY, NATIONAL ASSOCIATION, as Trustee to the Indenture, dated as of December 13, 2018, between the Issuer and the Trustee THIS SECOND SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”), dated as of June 30, 2023, between GCIC CLO II L

June 30, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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 30, 2023 Golub Capital BDC,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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 30, 2023 Golub Capital BDC, Inc. (Exact name of registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or Other Jurisdiction of Incorporation) (Commission F

May 8, 2023 10-Q

______________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

May 8, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 8, 2023 GOLUB CAPITAL BDC, INC.

May 8, 2023 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED MARCH 31, 2023 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might

gbdcq2fy2023earningspres Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC.

May 8, 2023 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): May 8, 2023 GOLUB CAPITAL BDC, INC.

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): May 8, 2023 GOLUB CAPITAL BDC, INC.

May 8, 2023 EX-99.1

SELECTED FINANCIAL HIGHLIGHTS (in thousands, expect per share data) March 31, 2023 December 31, 2022 Investment portfolio, at fair value $ 5,486,352 $ 5,451,946 Total assets $ 5,671,750 $ 5,665,751 Net asset value per share $ 14.73 $ 14.71 Quarter En

EX-99.1 2 gbdcfy2023q2earningsprxex.htm EX-99.1 Exhibit 99.1 FOR IMMEDIATE RELEASE: Golub Capital BDC, Inc. Declares Fiscal Year 2023 Third Quarter Distribution of $0.33 Per Share and Announces Fiscal Year 2023 Second Quarter Financial Results NEW YORK, NY, May 8, 2023 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced its financial results for its second fis

April 10, 2023 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): April 10, 2023 GOLUB CAPITAL BDC, I

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): April 10, 2023 GOLUB CAPITAL BDC, INC.

April 10, 2023 EX-99.1

GOLUB CAPITAL BDC, INC. ANNOUNCES $157.4 MILLION IN NEW MIDDLE-MARKET ORIGINATIONS FOR ITS FISCAL YEAR 2023 SECOND QUARTER

Exhibit 99.1 GOLUB CAPITAL BDC, INC. ANNOUNCES $157.4 MILLION IN NEW MIDDLE-MARKET ORIGINATIONS FOR ITS FISCAL YEAR 2023 SECOND QUARTER NEW YORK, NY, April 10, 2023 - Golub Capital BDC, Inc. (“GBDC”) (Nasdaq: GBDC, www.golubcapitalbdc.com), a business development company, today announced that it originated $157.4 million in new middle-market investment commitments during the three months ended Mar

April 6, 2023 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): April 6, 2023 GOLUB CAPITAL BDC, IN

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): April 6, 2023 GOLUB CAPITAL BDC, INC.

April 6, 2023 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2023 Second Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2023 Second Quarter Results NEW YORK, NY, April 6, 2023 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended March 31, 2023 on Monday, May 8, 2023 after the close of the financial markets. Golub Capital B

March 20, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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): March 17, 2023 Golub Capital BDC,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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): March 17, 2023 Golub Capital BDC, Inc. (Exact name of registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or Other Jurisdiction of Incorporation) (Commission

March 20, 2023 EX-10.1

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).

Exhibit 10.1 Execution Version AMENDED AND RESTATED SENIOR SECURED REVOLVING CREDIT AGREEMENT dated as of March 17, 2023 among GOLUB CAPITAL BDC, INC., as Borrower The LENDERS Party Hereto and JPMORGAN CHASE BANK, N.A. as Administrative Agent and as Collateral Agent $1,487,500,000 MUFG BANK, LTD., SUMITOMO MITSUI BANKING CORPORATION, and WELLS FARGO SECURITIES, LLC as Syndication Agents JPMORGAN C

March 14, 2023 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): March 14, 2023 GOLUB CAPITAL BDC, I

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): March 14, 2023 GOLUB CAPITAL BDC, INC.

March 14, 2023 EX-99.1

golubcapital.com Page 1 of 2 To Our Partners, Consistent with our commitment to transparency, we are writing today to share with you our initial assessment of the impact of the Silicon Valley Bank (“SVB”) and Signature Bank (“SBNY”) failures on Golub

golubcapitalbdcincpartn golubcapital.com Page 1 of 2 To Our Partners, Consistent with our commitment to transparency, we are writing today to share with you our initial assessment of the impact of the Silicon Valley Bank (“SVB”) and Signature Bank (“SBNY”) failures on Golub Capital BDC, Inc. (together with its consolidated subsidiaries, “GBDC”). In short, we believe GBDC and its investment adviser

February 9, 2023 8-K

Submission of Matters to a Vote of Security Holders

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): February 7, 2023 GOLUB CAPITAL BDC, INC.

February 8, 2023 EX-99.1

SELECTED FINANCIAL HIGHLIGHTS (in thousands, expect per share data) December 31, 2022 September 30, 2022 Investment portfolio, at fair value $ 5,451,946 $ 5,446,356 Total assets $ 5,665,751 $ 5,681,224 Net asset value per share $ 14.71 $ 14.89 Quarte

Exhibit 99.1 FOR IMMEDIATE RELEASE: Golub Capital BDC, Inc. Declares Fiscal Year 2023 Second Quarter Distribution of $0.33 Per Share and Announces Fiscal Year 2023 First Quarter Financial Results NEW YORK, NY, February 8, 2023 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced its financial results for its first fiscal quarter ended December 31, 2022. Except

February 8, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 8, 2023 GOLUB CAPITAL BDC, INC.

February 8, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 8, 2023 GOLUB CAPITAL BDC, INC.

February 8, 2023 10-Q

______________________________________________________________________________________________________ UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIE

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 814-00794 Golub Capital BDC, Inc.

February 8, 2023 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED DECEMBER 31, 2022 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “mi

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED DECEMBER 31, 2022 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “might,” “will,” “intend,” “should,” “could,” “can,” “would,” “expect,” “believe,” “estimate,” “anticipate,” “predict,” “potential,” “plan” or similar wo

January 19, 2023 SC 13G/A

GBDC / Golub Capital BDC Inc / STRS OHIO Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 GOLUB CAPITAL BDC INC (GBDC) (Name of Issuer) COM (Title of Class of Securities) 38173M102 (CUSIP Number) 12/31/2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: [*] Rule

January 10, 2023 EX-99.1

GOLUB CAPITAL BDC, INC. ANNOUNCES $247.0 MILLION IN NEW MIDDLE-MARKET ORIGINATIONS FOR ITS FISCAL YEAR 2023 FIRST QUARTER

Exhibit 99.1 GOLUB CAPITAL BDC, INC. ANNOUNCES $247.0 MILLION IN NEW MIDDLE-MARKET ORIGINATIONS FOR ITS FISCAL YEAR 2023 FIRST QUARTER NEW YORK, NY, January 10, 2023 - Golub Capital BDC, Inc. (“GBDC”) (Nasdaq: GBDC, www.golubcapitalbdc.com), a business development company, today announced that it originated $247.0 million in new middle-market investment commitments during the three months ended De

January 10, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 10, 2023 GOLUB CAPITAL BDC, INC.

January 5, 2023 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2023 First Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2023 First Quarter Results NEW YORK, NY, January 5, 2023 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter ended December 31, 2022 on Wednesday, February 8, 2023 after the close of the financial markets. Gol

January 5, 2023 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 5, 2023 GOLUB CAPITAL BDC, INC.

December 16, 2022 DEF 14A

SCHEDULE 14A (RULE 14a-101) Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A (RULE 14a-101) Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy Statement ? Definitive Additional Material ? Soliciting Material Pursuant to Rule 14a-12 Golub Capital BDC, Inc.

December 16, 2022 DEFA14A

SCHEDULE 14A (RULE 14a-101) Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

SCHEDULE 14A (RULE 14a-101) Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ? Filed by Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Definitive Proxy Statement ? Definitive Additional Material ? Soliciting Material Pursuant to Rule 14a-12 Golub Capital BDC, Inc.

November 21, 2022 EX-21.1

SUBSIDIARIES OF GOLUB CAPITAL BDC, INC. Name Jurisdiction Golub Capital BDC CLO III LLC Delaware Golub Capital BDC CLO III Depositor LLC Delaware Golub Capital BDC CLO 2014 LLC Delaware Golub Capital BDC Holdings LLC Delaware GBDC Quick Quack Coinves

EX-21.1 6 gbdcfy202210-kexhibit211.htm EX-21.1 EXHIBIT 21.1 SUBSIDIARIES OF GOLUB CAPITAL BDC, INC. Name Jurisdiction Golub Capital BDC CLO III LLC Delaware Golub Capital BDC CLO III Depositor LLC Delaware Golub Capital BDC CLO 2014 LLC Delaware Golub Capital BDC Holdings LLC Delaware GBDC Quick Quack Coinvest LLC Delaware GBDC Holdings Coinvest, Inc. Delaware GBDC Holdings ED Coinvest, Inc. Delaw

November 21, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 21, 2022 GOLUB CAPITAL BDC, INC.

November 21, 2022 EX-4.7

DESCRIPTION OF SECURITIES

Exhibit 4.7 DESCRIPTION OF SECURITIES As of September 30, 2022, Golub Capital BDC, Inc. (?we,? ?our,? ?us? or the ?Company?) had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the ?Exchange Act?): our common stock, par value $0.001 per share. For purposes of this exhibit, references to ?we,? ?our? and ?us? refer only to Golub Capital BDC, In

November 21, 2022 EX-99.1

SELECTED FINANCIAL HIGHLIGHTS (in thousands, expect per share data) September 30, 2022 June 30, 2022 Investment portfolio, at fair value $ 5,446,356 $ 5,613,550 Total assets $ 5,681,224 $ 5,770,195 Net asset value per share $ 14.89 $ 15.14 Quarter En

Exhibit 99.1 FOR IMMEDIATE RELEASE: Golub Capital BDC, Inc. Declares Fiscal Year 2023 First Quarter Distribution of $0.33 Per Share and Announces Fiscal Year 2022 Fourth Quarter Financial Results NEW YORK, NY, November 21, 2022 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced its financial results for its fourth fiscal quarter ended September 30, 2022. Exce

November 21, 2022 EX-99.2

Consent of Independent Registered Public Accounting Firm

EXHIBIT 99.2 Consent of Independent Registered Public Accounting Firm We consent to the incorporation by reference of our reports dated November 21, 2022, with respect to the consolidated financial statements of Golub Capital BDC, Inc. and Subsidiaries and the effectiveness of internal control over financial reporting of Golub Capital BDC, Inc. and Subsidiaries included in this Annual Report (Form

November 21, 2022 EX-14.2

GC ADVISORS LLC CODE OF ETHICS

EX-14.2 5 gbdcfy202210-kexhibit142.htm EX-14.2 GC ADVISORS LLC CODE OF ETHICS General This Code of Ethics for the Adviser supplements (i) the Joint Code of Ethics for Golub Capital BDC, Inc., Golub Capital BDC 3, Inc., and GC Advisors LLC that is applicable in connection with Golub Capital BDC, Inc. and Golub Capital BDC 3, Inc. and (ii) the policies and procedures contained in the Compliance Manu

November 21, 2022 EX-99.1

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED SEPTEMBER 30, 2022 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words “may,” “m

Confidential | for discussion purposes only GOLUB CAPITAL BDC, INC. EARNINGS PRESENTATION QUARTER ENDED SEPTEMBER 30, 2022 2 Such forward-looking statements may include statements preceded by, followed by or that otherwise include the words ?may,? ?might,? ?will,? ?intend,? ?should,? ?could,? ?can,? ?would,? ?expect,? ?believe,? ?estimate,? ?anticipate,? ?predict,? ?potential,? ?plan? or similar w

November 21, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): November 21, 2022 GOLUB CAPITAL BDC, INC.

November 21, 2022 EX-14.1

CODE OF ETHICS GOLUB CAPITAL BDC, INC. GOLUB CAPITAL DIRECT LENDING CORPORATION GOLUB CAPITAL BDC 3, INC. GOLUB CAPITAL BDC 4, INC. GOLUB CAPITAL DIRECT LENDING UNLEVERED CORPORATION GC ADVISORS LLC

CODE OF ETHICS FOR GOLUB CAPITAL BDC, INC. GOLUB CAPITAL DIRECT LENDING CORPORATION GOLUB CAPITAL BDC 3, INC. GOLUB CAPITAL BDC 4, INC. GOLUB CAPITAL DIRECT LENDING UNLEVERED CORPORATION GC ADVISORS LLC Section I Statement of General Fiduciary Principles This Code of Ethics (the ?Code?) has been adopted by each of Golub Capital BDC, Inc., Golub Capital BDC 3, Inc., Golub Capital BDC 4, Inc., Golub

November 21, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Form 10-K ______________________________________________________________________________________________________ (Mark One) ý ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE S

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 Form 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended September 30, 2022 or o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number: 814-00794 GOLUB CAPITAL BDC, INC.

November 21, 2022 EX-99.1

GOLUB CAPITAL BDC, INC. (THE “COMPANY”) INVESTOR PRIVACY NOTICE

EXHIBIT 99.1 GOLUB CAPITAL BDC, INC. (THE ?COMPANY?) INVESTOR PRIVACY NOTICE Maintaining the confidentiality of the personal information of our current and prospective investors is one of our highest priorities. This notice sets forth the type of personal information we collect, how that information is used by us, and how we protect your personal information. In this Investor Privacy Notice, ?we?,

November 21, 2022 EX-3.3

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).

AMENDED AND RESTATED BYLAWS OF GOLUB CAPITAL BDC, INC. ARTICLE I. OFFICES 1.1 Registered Office. The registered office of Golub Capital BDC, Inc. (the ?Corporation?) in the State of Delaware shall be established and maintained at c/o The Corporation Trust Company, 1209 Orange Street, City of Wilmington, County of New Castle, Delaware 19801 and The Corporation Trust Company shall be the registered

October 11, 2022 EX-99.1

GOLUB CAPITAL BDC, INC. ANNOUNCES $176.7 MILLION IN NEW MIDDLE-MARKET ORIGINATIONS FOR ITS FISCAL YEAR 2022 FOURTH QUARTER

Exhibit 99.1 GOLUB CAPITAL BDC, INC. ANNOUNCES $176.7 MILLION IN NEW MIDDLE-MARKET ORIGINATIONS FOR ITS FISCAL YEAR 2022 FOURTH QUARTER NEW YORK, NY, October 11, 2022 - Golub Capital BDC, Inc. (?GBDC?) (Nasdaq: GBDC, www.golubcapitalbdc.com), a business development company, today announced that it originated $176.7 million in new middle-market investment commitments during the three months ended S

October 11, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 11, 2022 GOLUB CAPITAL BDC, INC.

October 7, 2022 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 7, 2022 GOLUB CAPITAL BDC, INC.

October 7, 2022 EX-99.1

Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2022 Fourth Quarter Results

Exhibit 99.1 Golub Capital BDC, Inc. Schedules Release of Fiscal Year 2022 Fourth Quarter Results NEW YORK, NY, October 7, 2022 - Golub Capital BDC, Inc., a business development company (NASDAQ: GBDC, www.golubcapitalbdc.com), announced today that it will report its financial results for the quarter and the year ended September 30, 2022 on Monday, November 21, 2022 after the close of the financial

September 20, 2022 8-K

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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): September 16, 2022 Golub Capital BDC, Inc. (Exact name of registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or Other Jurisdiction of Incorporation) (Commiss

September 20, 2022 EX-10.1

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).

Exhibit 10.1 COMMITMENT INCREASE AGREEMENT September 16, 2022 JPMorgan Chase Bank, N.A., as Administrative Agent 500 Stanton Christiana Road NCC 5, Floor 1 Newark, DE 19713-2107 Attention: Loan & Agency Services Group Ladies and Gentlemen: We refer to the Senior Secured Revolving Credit Agreement dated as of February 11, 2021 (as amended, modified or supplemented from time to time, the ?Credit Agr

September 8, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 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): September 2, 2022 Golub Capital BDC, Inc. (Exact name of registrant as specified in its charter) Delaware 814-00794 27-2326940 (State or Other Jurisdiction of Incorporation) (Commissi

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