Form 8-K

8-K — GOLUB CAPITAL BDC, Inc.

Accession: 0001476765-26-000045

Filed: 2026-08-03

Period: 2026-08-03

CIK: 0001476765

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — gbdc-20260803.htm (Primary)

EX-99.1 (gbdcfy2026q3earningsprxex.htm)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: gbdc-20260803.htm · Sequence: 1

gbdc-20260803

false000147676500014767652026-08-032026-08-03

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 3, 2026

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

File Number)

(IRS Employer

Identification No.)

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

(Address of Principal Executive Offices) (Zip Code)

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

____ ____

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

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

☐

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class Trading Symbol Name of each exchange on which registered

Common Stock, par value $0.001 per share GBDC The Nasdaq Global Select Market

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

Emerging growth company o

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

Item 2.02.

Results of Operations and Financial Condition.

On August 3, 2026, Golub Capital BDC, Inc. issued a press release announcing its financial results for its third fiscal quarter ended June 30, 2026. A copy of this press release is attached hereto as Exhibit 99.1.

The information in Item 2.02 of this Current Report on Form 8-K, including Exhibits 99.1 furnished herewith, is being furnished and shall not be deemed “filed” for any purpose of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of such Section. The information in this Current Report on Form 8-K shall not be deemed to be incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01.

Financial Statements and Exhibits.

(d) Exhibits.

99.1 Press Release of Golub Capital BDC, Inc., dated as of August 3, 2026.

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

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

GOLUB CAPITAL BDC, INC.

Date: August 3, 2026

By: /s/ Christopher C. Ericson

Name: Christopher C. Ericson

Title: Chief Financial Officer

EX-99.1

Filename: gbdcfy2026q3earningsprxex.htm · Sequence: 2

Document

Exhibit 99.1

Golub Capital BDC, Inc. Announces Fiscal Year 2026 Third Quarter Financial Results

Declares Quarterly Distribution of $0.33 Per Share

NEW YORK, NY, August 3, 2026 - Golub Capital BDC, Inc., a business development company (Nasdaq: GBDC), today announced its financial results for its third fiscal quarter ended June 30, 2026.

Except where the context suggests otherwise, the terms “we,” “us,” “our,” and “Company” refer to Golub Capital BDC, Inc. and its consolidated subsidiaries. “GC Advisors” refers to GC Advisors LLC, our investment adviser.

SELECTED FINANCIAL HIGHLIGHTS

(in thousands, except per share data)

June 30, 2026 March 31, 2026

Investment portfolio, at fair value $ 8,196,353 $ 8,317,245

Total assets $ 8,339,566 $ 8,529,697

Net asset value per share $ 14.25 $ 14.35

Quarter Ended

June 30, 2026 March 31, 2026

Net investment income per share $ 0.33 $ 0.33

Amortization of purchase premium per share 0.01 0.01

Adjusted net investment income per share1

$ 0.34 $ 0.34

Net realized/unrealized gain/(loss) per share $ (0.11) $ (0.51)

Reversal of realized/unrealized loss resulting from the amortization of purchase premium per share1

(0.01) (0.01)

Adjusted net realized/unrealized gain/(loss) per share1

$ (0.12) $ (0.52)

Earnings/(loss) per share $ 0.22 $ (0.18)

Adjusted earnings/(loss) per share1

$ 0.22 $ (0.18)

Net asset value per share $ 14.25 $ 14.35

Distributions paid per share $ 0.33 $ 0.33

1 On September 16, 2019 and June 3, 2024, the Company completed its acquisition of Golub Capital Investment Corporation (“GCIC”) and Golub Capital BDC 3, Inc. (“GBDC 3”), respectively. Each acquisition was accounted for under the asset acquisition method of accounting in accordance with Accounting Standards Codification 805-50, Business Combinations — Related Issues. Under asset acquisition accounting, where the consideration paid to GCIC and GBDC 3’s stockholders exceeded the relative fair values of the assets acquired, the premium paid by the Company was allocated to the cost of the GCIC and GBDC 3 investments acquired by the Company pro-rata based on their relative fair value. Immediately following each acquisition, the Company recorded its assets at their respective fair values and, as a result, the purchase premium allocated to the cost basis of the assets acquired was immediately recognized as unrealized depreciation on the Company's Consolidated Statement of Operations. The purchase premium allocated to investments in loan securities acquired from GCIC and GBDC 3 will amortize over the life of the loans through interest income with a corresponding reversal of the unrealized depreciation on such loans acquired through their ultimate disposition. The purchase premium allocated to investments in equity securities will not amortize over the life of the equity securities through interest income and, assuming no subsequent change to the fair value of the GCIC and GBDC 3 equity securities acquired and disposition of such equity securities at fair value, the Company will recognize a realized loss with a corresponding reversal of the unrealized depreciation upon disposition of the GCIC and GBDC 3 equity securities acquired.

As a supplement to U.S. generally accepted accounting principles (“GAAP”) financial measures, the Company is providing the following non-GAAP financial measures that it believes are useful for the reasons described below:

•“Adjusted Net Investment Income” and “Adjusted Net Investment Income Per Share” – excludes the amortization of the purchase premium from net investment income calculated in accordance with GAAP.

•“Adjusted Net Investment Income Before Accrual for Capital Gain Incentive Fee” – Adjusted Net Investment Income excluding the accrual or reversal for the capital gain incentive fee required under GAAP;

•“Adjusted Net Realized and Unrealized Gain/(Loss)” and “Adjusted Net Realized and Unrealized Gain/(Loss) Per Share” – excludes the unrealized loss resulting from the purchase premium write-down and the corresponding reversal of the unrealized loss from the amortization of the premium from the determination of realized and unrealized gain/(loss) in accordance with GAAP.

•“Adjusted Net Income/(Loss)” and “Adjusted Earnings/(Loss) Per Share” – calculates net income and earnings per share based on Adjusted Net Investment Income and Adjusted Net Realized and Unrealized Gain/(Loss).

Exhibit 99.1

The Company believes that excluding the financial impact of the purchase premium write down in the above non-GAAP financial measures is useful for investors as it is a non-cash expense/loss resulting from the acquisitions of GCIC and GBDC 3 and is one method the Company uses to measure its financial condition and results of operations. In addition, the Company believes excluding the accrual of the capital gain incentive fee under GAAP is useful as a portion of such accrual is not contractually payable under the terms of the Company’s investment advisory agreement with GC Advisors.

Third Fiscal Quarter 2026 Highlights

•Net investment income per share for the quarter ended June 30, 2026 remained consistent at $0.33 as compared to the quarter ended March 31, 2026. Excluding $0.01 per share in purchase premium amortization from the GCIC/GBDC 3 acquisitions, and no accrual or reversal for the capital gain incentive fee under GAAP, Adjusted Net Investment Income Per Share1 for the quarters ended June 30, 2026 and March 31, 2026 was $0.34.

•Net realized and unrealized gain/(loss) per share for the quarter ended June 30, 2026 was ($0.11). Adjusted Net Realized and Unrealized Gain/(Loss) Per Share1 was ($0.12) when excluding $0.01 per share net reversal of unrealized depreciation and realized loss resulting from the amortization of the GCIC/GBDC 3 acquisition purchase premium. The Adjusted Net Realized and Unrealized Gain/(Loss) Per Share1 for the quarter ended June 30, 2026 was primarily due to (i) unrealized depreciation resulting from the underperformance of certain portfolio companies that were on or taken to non-accrual during the quarter and (ii) realized losses recognized on the restructuring of two portfolio companies that was partially offset by (iii) net realized gains on the exit of equity investments in multiple portfolio companies and (iv) the reversal of a portion of the unrealized depreciation from fair value adjustments related to market wide credit spread widening recognized during the quarter ended March 31, 2026. For additional analysis, please refer to the Quarter Ended 06.30.2026 Earnings Presentation available on the Investor Resources link on the homepage of the Company's website (www.golubcapitalbdc.com) under Events/Presentations. The Earnings Presentation was also filed with the Securities and Exchange Commission as an exhibit to a Form 8-K. These results compare to net realized and unrealized gain/(loss) per share of ($0.51) during the quarter ended March 31, 2026. Adjusted Net Realized and Unrealized Gain/(Loss) Per Share1 for the quarter ended March 31, 2026 was ($0.52) when excluding $0.01 per share net reversal of unrealized depreciation and realized loss resulting from the amortization of the GCIC/GBDC 3 acquisition purchase premium.

•Earnings per share for the quarter ended June 30, 2026 was $0.22 as compared to a loss of $(0.18) for the quarter ended March 31, 2026. Adjusted Earnings/(Loss) Per Share1 for the quarter ended June 30, 2026 was $0.22 as compared to $(0.18) for the quarter ended March 31, 2026.

•Net asset value (“NAV”) per share decreased to $14.25 at June 30, 2026 from $14.35 at March 31, 2026.

•On June 29, 2026, we paid a quarterly distribution of $0.33 per share.

•On July 31, 2026, our board of directors declared a quarterly distribution of $0.33 per share, which is payable on September 29, 2026, to stockholders of record as of September 14, 2026.

•During the three months ended June 30, 2026, we opportunistically repurchased approximately 1,113,992 shares of our common stock for an aggregate purchase price of approximately $14.4 million, at an aggregate price of $12.90 per share, and during the period July 1, 2026 through August 3, 2026 we repurchased approximately 0.4 million shares of our common stock for an aggregate purchase price of approximately $4.9 million, at an aggregate price of $12.86 per share in response to market volatility.

•During the three months ended June 30, 2026, the Golub Capital Employee Grant Program Rabbi Trust (the “Trust”) purchased approximately $31.4 million, or 2,425,911 shares, of our common stock for the purpose of awarding incentive compensation to employees of Golub Capital. Through the first two calendar quarters of 2026, the Trust purchased $50.1 million, or 3,925,911 shares, of our common stock.

1 See footnote 1 to “Selected Financial Highlights” above.

Exhibit 99.1

Portfolio and Investment Activities

As of June 30, 2026, the Company had investments in 424 portfolio companies with a total fair value of $8,196.4 million. This compares to the Company’s portfolio as of March 31, 2026, when the Company had investments in 420 portfolio companies with a total fair value of $8,317.2 million. Investments in portfolio companies as of June 30, 2026 and March 31, 2026 consisted of the following:

As of June 30, 2026 As of March 31, 2026

Investments Percentage of Investments Percentage of

at Fair Value Total at Fair Value Total

Investment Type (In thousands) Investments (In thousands) Investments

Senior secured $ 391,132 4.8 % $ 403,460 4.9 %

One stop 7,162,462 87.4 7,241,236 87.0

Junior debt*

59,048 0.7 57,190 0.7

Equity 583,711 7.1 615,359 7.4

Total $ 8,196,353 100.0 % $ 8,317,245 100.0 %

Junior debt is comprised of second lien and subordinated debt.

The following table shows the asset mix of our new investment commitments for the three months ended June 30, 2026:

New Investment

Commitments Percentage of

(In thousands) Commitments

Senior secured $ 708 5.6 %

One stop 11,162 88.7

Junior debt*

— —

Equity 715 5.7

Total new investment commitments $ 12,585 100.0 %

Junior debt is comprised of second lien and subordinated debt.

Total investments in portfolio companies at fair value were $8,196.4 million at June 30, 2026. As of June 30, 2026, total assets were $8,339.6 million, net assets were $3,704.9 million and net asset value per share was $14.25.

Consolidated Results of Operations

For the third fiscal quarter of 2026, the Company reported GAAP net income of $57.0 million or $0.22 per share and Adjusted Net Income2 of $57.0 million or $0.22 per share. GAAP net investment income was $85.2 million or $0.33 per share and Adjusted Net Investment Income1 was $87.5 million or $0.34 per share. GAAP net realized and unrealized gain/(loss) was ($28.2) million or ($0.11) per share and Adjusted Realized and Unrealized Gain/(Loss)1 was ($30.5) million or ($0.12) per share.

Net income can vary substantially from period to period due to various factors, including the level of new investment commitments, the recognition of realized gains and losses and unrealized appreciation and depreciation. As a result, quarterly comparisons of net income may not be meaningful.

Liquidity and Capital Resources

The Company’s liquidity and capital resources are derived from the Company’s debt securitizations (also known as collateralized loan obligations, or CLOs), unsecured notes, revolving credit facilities and cash flow from operations. The Company’s primary uses of funds from operations include investments in portfolio companies and payment of fees and other expenses that the Company incurs. The Company has used, and expects to continue to use, its debt securitizations, unsecured notes, revolving credit facilities, proceeds from its investment portfolio and proceeds from offerings of its securities and its dividend reinvestment plan to finance its investment objectives.

2 See footnote 1 to “Selected Financial Highlights” above.

Exhibit 99.1

As of June 30, 2026, we had cash, cash equivalents and foreign currencies of $20.0 million, restricted cash, restricted cash equivalents and restricted foreign currencies of $50.7 million and $4,561.8 million of debt outstanding. As of June 30, 2026, subject to leverage and borrowing base restrictions, we had approximately $1,725.9 million of remaining availability, in the aggregate, on our revolving credit facility with JPMorgan. In addition, as of June 30, 2026, we had $266.8 million of remaining commitments and availability on our unsecured line of credit with GC Advisors.

The Company’s GAAP leverage ratio decreased to 1.24x as of June 30, 2026 and our GAAP debt-to-equity ratio, net3 decreased to 1.23x as of June 30, 2026 (1.23x, on average, throughout the quarter ended June 30, 2026).

On May 27, 2026, we issued $500.0 million of unsecured notes, which bear a fixed interest rate of 6.250% (yield to maturity of 6.508%) and mature on June 1, 2031 (the “2031 Notes”). In connection with the 2031 Notes, we entered into interest rate swap agreements on the $500 million principal amount of the 2031 Notes where we receive a fixed interest rate of 6.250% and pay a floating interest rate of Daily SOFR plus 2.178%

On July 2, 2026, we amended our revolving credit facility with JPMorgan to, among other things, (i) remove the 0.10% adjustment to term SOFR rate and (ii) extend the maturity date to July 2, 2031 from April 4, 2030.

Portfolio and Asset Quality

GC Advisors regularly assesses the risk profile of each of the Company’s investments and rates each of them based on an internal system developed by Golub Capital and its affiliates. This system is not generally accepted in our industry or used by our competitors. It is based on the following categories, which we refer to as GC Advisors’ internal performance ratings:

Internal Performance Ratings

Rating Definition

5 Involves the least amount of risk in our portfolio. The borrower is performing above expectations, and the trends and risk factors are generally favorable.

4 Involves an acceptable level of risk that is similar to the risk at the time of origination. The borrower is generally performing as expected, and the risk factors are neutral to favorable.

3 Involves a borrower performing below expectations and indicates that the loan’s risk has increased somewhat since origination. The borrower could be out of compliance with debt covenants; however, loan payments are generally not past due.

2 Involves a borrower performing materially below expectations and indicates that the loan’s risk has increased materially since origination. In addition to the borrower being generally out of compliance with debt covenants, loan payments could be past due (but generally not more than 180 days past due).

1 Involves a borrower performing substantially below expectations and indicates that the loan’s risk has substantially increased since origination. Most or all of the debt covenants are out of compliance and payments are substantially delinquent. Loans rated 1 are not anticipated to be repaid in full and we will reduce the fair market value of the loan to the amount we anticipate will be recovered.

Our internal performance ratings do not constitute any rating of investments by a nationally recognized statistical rating organization or represent or reflect any third-party assessment of any of our investments. For additional analysis on the Company's internal performance ratings as of June 30, 2026, please refer to the Quarter Ended 06.30.2026 Earnings Presentation available on Investors Resources link on the homepage of the Company's website (www.golubcapitalbdc.com) under Events/Presentations.

3 GAAP debt-to-equity, net is calculated as (a) total debt reduced by (i) cash, (ii) cash equivalents and foreign currencies and (iii) restricted cash held for partial repayment on notes of certain of our securitization vehicles past their reinvestment period term (if any) divided by (b) total net assets.

Exhibit 99.1

The following table shows the distribution of the Company’s investments on the 1 to 5 internal performance rating scale at fair value as of June 30, 2026 and March 31, 2026:

June 30, 2026 March 31, 2026

Internal Investments Percentage of Investments Percentage of

Performance at Fair Value Total at Fair Value Total

Rating (In thousands) Investments (In thousands) Investments

5 $ 140,649 1.7 % $ 123,169 1.5 %

4 6,958,677 84.9 7,288,701 87.6

3 869,177 10.6 722,546 8.7

2 227,850 2.8 182,722 2.2

1 — — 107 0.0 *

Total $ 8,196,353 100.0 % $ 8,317,245 100.0 %

* Represents an amount less than 0.1%

Conference Call

The Company will host an earnings conference call at 10:00 am (Eastern Time) on Tuesday, August 4, 2026 to discuss its quarterly financial results.

All interested parties may register to participate in the conference call through the following URL: https://events.q4inc.com/analyst/406709985?pwd=uxQSacg1.

Participants are also invited to access the conference call by dialing one of the following numbers:

Domestic: +1 (833) 461-5787

International: +1 (585) 542-9983

Participants should reference Golub Capital BDC, Inc. when prompted, or reference conference ID number 406 709 985. All callers are asked to dial in approximately 10-15 minutes prior to the call. An archived replay will be available via a link located on the Events & Presentations section of GBDC's website for one year.

For a slide presentation that we intend to refer to on the earnings conference call, please visit the Investor Resources link on the homepage of our website (www.golubcapitalbdc.com) and click on the Quarter Ended 06.30.2026 Earnings Presentation under Events/Presentations.

Exhibit 99.1

Golub Capital BDC, Inc. and Subsidiaries

Consolidated Statements of Financial Condition

(In thousands, except share and per share data)

June 30, 2026 March 31, 2026

Assets (unaudited) (unaudited)

Investments, at fair value (cost of $8,377,113 and $8,477,016, respectively)

$ 8,196,353 $ 8,317,245

Cash and cash equivalents 12,962 65,429

Unrestricted foreign currencies (cost of $7,132 and $6,884, respectively)

7,044 6,763

Restricted cash and cash equivalents 50,657 62,987

Interest receivable 60,888 63,678

Receivable for investments 5,197 3,587

Other assets 6,465 10,008

Total Assets $ 8,339,566 $ 8,529,697

Liabilities

Debt $ 4,561,799 $ 4,723,905

Less unamortized debt issuance costs (24,247) (21,427)

Debt less unamortized debt issuance costs 4,537,552 4,702,478

Interest payable 48,007 33,891

Management and income incentive fees payable 36,152 36,533

Accounts payable and other liabilities 12,986 8,675

Total Liabilities 4,634,697 4,781,577

Net Assets

Preferred stock, par value $0.001 per share, 1,000,000 shares authorized, zero shares issued and outstanding as of June 30, 2026 and March 31, 2026, respectively.

— —

Common stock, par value $0.001 per share, 500,000,000 shares authorized, 260,033,889 issued and outstanding as of June 30, 2026 and 261,147,881 issued and outstanding as of March 31, 2026.

260 261

Paid in capital in excess of par 3,953,049 3,967,414

Distributable earnings (248,440) (219,555)

Total Net Assets 3,704,869 3,748,120

Total Liabilities and Total Net Assets $ 8,339,566 $ 8,529,697

Number of common shares outstanding 260,033,889 261,147,881

Net asset value per common share $ 14.25 $ 14.35

Exhibit 99.1

Golub Capital BDC, Inc. and Subsidiaries

Consolidated Statements of Operations

(In thousands, except share and per share data)

Three months ended

June 30, 2026 March 31, 2026

(unaudited) (unaudited)

Investment income

Interest income $ 185,001 $ 183,528

Acquisition purchase price premium amortization (2,256) (2,520)

Dividend income 4,233 6,360

Fee income 752 766

Total investment income 187,730 188,134

Expenses

Interest and other debt financing expenses 60,993 61,069

Base management fee 20,716 21,035

Incentive fee 15,436 15,542

Administrative service fee 3,107 2,939

Professional fees 1,889 1,627

General and administrative expenses 372 375

Total expenses 102,513 102,587

Net investment income after tax 85,217 85,547

Net gain (loss) on investment transactions

Net realized gain (loss) from:

Investments (11,071) (1,451)

Foreign currency transactions (13,710) 1,354

Forward currency contracts

— (10,258)

Net realized gain (loss) in investment transactions

(24,781) (10,355)

Net change in unrealized appreciation (depreciation) from:

Investments

(13,547) (131,632)

Translation of assets and liabilities in foreign currencies 3,171 (4,398)

Forward currency contracts

6,951 14,042

Net change in unrealized appreciation (depreciation) on investment transactions

(3,425) (121,988)

Net gain (loss) on investment transactions (28,206) (132,343)

(Provision) benefit for taxes on unrealized appreciation on investments (2) —

Net increase (decrease) in net assets resulting from operations $ 57,009 $ (46,796)

Per Common Share Data

Basic and diluted earnings per common share $ 0.22 $ (0.18)

Dividends and distributions declared per common share $ 0.33 $ 0.33

Basic and diluted weighted average common shares outstanding 260,446,791 262,676,687

Exhibit 99.1

ABOUT GOLUB CAPITAL BDC, INC.

Golub Capital BDC, Inc. (“GBDC”) is an externally-managed, non-diversified closed-end management investment company that has elected to be treated as a business development company under the Investment Company Act of 1940. GBDC invests primarily in one stop and other senior secured loans to middle market companies that are often sponsored by private equity investors. GBDC’s investment activities are managed by its investment adviser, GC Advisors LLC, an affiliate of the Golub Capital LLC group of companies (“Golub Capital”).

ABOUT GOLUB CAPITAL

Golub Capital is a market-leading, award-winning direct lender and experienced private credit manager. The firm specializes in delivering reliable, creative and compelling financing solutions to companies backed by private equity sponsors. Golub Capital’s sponsor finance expertise also forms the foundation of its Broadly Syndicated Loan and Credit Opportunities investment programs. Golub Capital nurtures long-term, win-win partnerships that inspire repeat business from private equity sponsors and investors.

As of April 1, 2026, Golub Capital had over 1,100 employees and over $90 billion of capital under management, a gross measure of invested capital including leverage. The firm has offices in North America, Europe, Asia and the Middle East. For more information, please visit golubcapital.com.

FORWARD-LOOKING STATEMENTS

This press release may contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Statements other than statements of historical facts included in this press release may constitute forward-looking statements and are not guarantees of future performance or results and involve a number of risks and uncertainties. Actual results may differ materially from those expressed or implied in the forward-looking statements as a result of a number of factors, including those described from time to time in filings with the Securities and Exchange Commission. Golub Capital BDC, Inc. undertakes no duty to update any forward-looking statement made herein. All forward-looking statements speak only as of the date of this press release.

Contact:

Christopher Ericson

312-212-4036

cericson@golubcapital.com

Source: Golub Capital BDC, Inc.

XML — IDEA: XBRL DOCUMENT

XML

Filename: R1.htm · Sequence: 7

v3.26.1

Cover

Aug. 03, 2026

Cover [Abstract]

Document Type

8-K

Document Period End Date

Aug. 03, 2026

Entity Registrant Name

GOLUB CAPITAL BDC, INC.

Entity Incorporation, State or Country Code

Securities Act File Number

814-00794

Entity Tax Identification Number

27-2326940

Entity Address, Address Line One

200 Park Avenue

Entity Address, Address Line Two

25th Floor

Entity Address, City or Town

New York

Entity Address, State or Province

Entity Address, Postal Zip Code

10166

City Area Code

212

Local Phone Number

750-6060

Written Communications

false

Soliciting Material

false

Pre-commencement Tender Offer

false

Pre-commencement Issuer Tender Offer

false

Title of 12(b) Security

Common Stock, par value $0.001 per share

Trading Symbol

GBDC

Security Exchange Name

NASDAQ

Entity Emerging Growth Company

false

Amendment Flag

false

Entity Central Index Key

0001476765

- Definition

Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Cover page.

+ References

No definition available.

+ Details

Name:

dei_CoverAbstract

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 2 such as Street or Suite number

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine2

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration