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 , 2025

New Mountain Guardian IV Income Fund, L.L.C.

(Exact name of registrant as specified in its charter)

Delaware

814-01639

92-0964074

(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 3.02.

Unregistered Sale of Equity Securities.

On September 16, 2025, New Mountain Guardian IV Income Fund, L.L.C. (the “Company”) delivered a capital drawdown notice to its investors relating to the sale of 4,099,240 of the Company’s units (the “Units”) for an aggregate offering price of $40,992,400, at a price per Unit equal to $10.00. No underwriting discounts or commissions have been or will be paid in connection with the sale of the Units. The sale of the Units is expected to close on September 30, 2025.

The sale of the Units described herein was and will be made pursuant to subscription agreements entered into by the Company and its investors. Under the terms of the subscription agreements, investors are required to fund drawdowns to purchase the Units up to the amount of its capital commitment on an as-needed basis with a minimum of 10 business days’ prior notice to investors.

The offer and sale of the Units was exempt from the registration requirements of the Securities Act of 1933, as amended, pursuant to Section 4(a)(2) and Rule 506 of Regulation D promulgated thereunder.

Item 9.01.

Financial Statements and Exhibits.

d) Exhibits.

Exhibit Number		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, as amended, the Registrant has duly caused this Current Report on Form 8-K to be signed on its behalf by the undersigned hereunto duly authorized.

	NEW MOUNTAIN Guardian IV INCOME FUND, L.L.C.

Date: September 18, 2025	By:	/s/ Eric Kane
		Name:	Eric Kane
		Title:	Corporate Secretary

New Mountain Guardian IV Income Fund, L.L.C. 8-K