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~~March 1319, 2026

New Mountain Guardian IV BDC, L.L.C.

(Exact name of registrant as specified in its charter)

Delaware

814-01528

88-1377220

(State or other jurisdiction of

incorporation or organization)

(Commission

File Number)

(IRS Employer

Identification Number)

1633 Broadway, 48th Floor,
New York, New York	10019
(Address of principal executive offices)	(Zip Code)

Registrant’s telephone number, including area code: (212) 720-0300

None

(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(s)		Name of each exchange on which registered
N/A		N/A		N/A

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ⮽

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

~~Item~~ 1~~.01. Entry into a Material Definitive Agreement.~~

On January 13, 2026, New Mountain Guardian IV Holdings, L.L.C. (“GIV Holdings”), wholly owned subsidiary of New Mountain Guardian IV BDC, L.L.C. (the “Company”) for which the Company is the managing member, and the Company entered into an Amendment No. 3 (“Amendment No. 3”) to Loan and Security Agreement (together with the exhibits and schedules thereto, the “Loan Agreement” and the facility thereunder the “Wells Fargo Facility”) by and among GIV Holdings, as borrower, the Company, as seller, as equityholder and as collateral manager, Wells Fargo Bank, National Association, as the administrative agent, a lender, and swingline lender, and Western Alliance Trust Company, N.A., as the collateral custodian. Unless otherwise defined, the terms herein shall have the meaning ascribed to them in Amendment No. 3.

Amendment No. 3 amended the Loan Agreement to, among other things, (i) extend the Revolving Period End Date from March 2028 to November 2028; and (ii) extend the Facility Maturity Date from March 2030 to November 2030. All other terms of the Loan Agreement shall remain in full force and effect.

The foregoing description of Amendment No. 3 is qualified in its entirety by reference to a copy of Amendment No. 3, which will be filed as an exhibit to the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025.

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

The disclosure set forth above under Item 1.01 is incorporated by reference herein.

Item 5.02.

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

On ~~January 15~~March 19, 2026, ~~Alfred F. Hurley, Jr. notified~~ the Board of Directors of ~~the~~New ~~Company~~Mountain Guardian IV BDC, L.L.C. (the “~~Board~~Company”) ofreceived ~~his~~and ~~decision~~accepted tothe ~~retire~~resignation of ~~from~~Kris ~~his~~Corbett ~~position~~ as aChief ~~director~~Financial Officer and Treasurer of the Company. Mr. ~~Hurley~~Corbett’s ~~has~~resignation ~~served~~will asbecome effective upon the completion of a ~~member~~prudent transition of the ~~Board~~role ~~since~~to ~~2022~~a successor Chief Financial Officer and Treasurer, which is expected to occur by May 29, 2026 (the “Effective Date”). Mr. ~~Hurley’s~~ ~~retirement~~Corbett iswill ~~not~~continue to serve as the ~~result~~Chief Financial Officer and Treasurer of the Company until the Effective Date. In submitting his resignation, Mr. Corbett did not express any disagreement ~~with~~on any matter relating to the Company’s operations, policies or practices.

In order to fill the vacancy created by Mr. Hurley’s retirement, the Board appointed Daniel B. Hébert as a Director of the Company, effective as of January 15, 2026. In connection with his appointment, Mr. Hébert will also serve as a member of the Audit Committee, Nominating and Corporate Governance Committee, and Valuation Committee of the Board. Mr. Hébert, age 69, currently serves as Chief Executive Officer of 777 Securities, LLC, a registered broker-dealer, since September 2018. He was Co-Founder, Chief Operating Officer and Chief Compliance Officer of Vision One Management Partners, LP, a registered investment advisor, from 2022 to 2024. He served as Chief Executive Officer of Bernstein Hébert Securities, a registered broker-dealer, from September 2018 to June 2020, and as Chief Operating Officer of Bernstein Equity Partners, LLC, a family office and investment banking boutique, from May 2017 to June 2020. Mr. Hébert has also served as a director of New Mountain Private Credit Fund since 2024 and has served as a Class III Director of New Mountain Finance Corporation since 2019.2

There is no arrangement or understanding between Mr. Hébert and any other persons pursuant to which Mr. Hébert was selected as a director. There are no family relationships between Mr. Hébert and any director, executive officer or person nominated or chosen by the Company to become a director or executive officer of the Company within the meaning of Item 401(d) of Regulation S-K under the Securities Act of 1933, as amended (“Regulation S-K”). Mr. Hébert is not a party to any transaction, or any proposed transaction, required to be disclosed pursuant to Item 404(a) of Regulation S-K.

Item 9.01. Financial Statements and Exhibits

(d) Exhibits.

	Exhibit No.		Description
	104		Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

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

New Mountain Guardian IV BDC, L.L.C.

By:	/s/ Eric Kane
Name:	Eric Kane
Title:	Corporate Secretary

Date: ~~January~~March 1624, 2026

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