Form 8-K

8-K — New Mountain Finance Corp

Accession: 0001580642-26-007114

Filed: 2026-10-26

Period: 2026-10-20

CIK: 0001496099

Item: Other Events

Item: Financial Statements and Exhibits

Documents

8-K — nmfc_8k.htm (Primary)

EX-99.1 (ex99-1.htm)

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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):

October 20, 2026

New Mountain Finance Corporation

(Exact name of registrant as specified in its charter)

Delaware

814-00832

27-2978010

(State or other jurisdiction of

incorporation or organization)

(Commission

File Number)

(IRS Employer

Identification Number)

1633 Broadway, 48th Floor, New York, NY 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

Common stock, par value $0.01 per share

NMFC

NASDAQ Global Select Market

8.250% Notes due 2028

NMFCZ

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 (§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 ¨

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 8.01.

Other Events.

Extension of Stock Repurchase Program

On October 26, 2026, New

Mountain Finance Corporation (the “Company”) issued a press release to announce that on October 20, 2026 its

board of directors approved an extension of the Company’s stock repurchase program. The press release is attached as Exhibit 99.1

to this Form 8-K and is incorporated herein by reference.

Item 9.01.

Financial Statements and Exhibits.

d) Exhibits.

Exhibit

Number

Description

99.1

Press Release, dated October 26, 2026

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 FINANCE CORPORATION

Date: October 26, 2026

By:

/s/ Eric Kane

Name:

Eric Kane

Title:

Corporate Secretary

EX-99.1

Filename: ex99-1.htm · Sequence: 2

Exhibit 99.1

New Mountain Finance Corporation Announces

the Extension of its Stock Repurchase Program

NEW YORK--(BUSINESS WIRE)—October 26, 2026--New Mountain Finance

Corporation (NASDAQ: NMFC) (“NMFC” or “the Company”) today announced that on October 20, 2026, the Company’s

board of directors authorized an extension of a previously established stock repurchase program (the “Repurchase Program”).

Pursuant to the Repurchase Program, the Company can repurchase up to $150 million worth of its common stock at the discretion of NMFC’s

management team. The Repurchase Program was set to expire on December 31, 2026, but the Company’s board of directors elected to

extend the Repurchase Program through December 31, 2027. Under the Repurchase Program, NMFC may, but is not obligated to, repurchase its

outstanding common stock in the open market from time to time provided that NMFC complies with the prohibitions under its Code of Ethics

and the guidelines specified in Rule 10b-18 of the Securities Exchange Act of 1934, as amended, including certain price, market volume

and timing constraints. Unless further extended by NMFC’s board of directors, the Company expects the Repurchase Program to be in

place until the earlier of December 31, 2027 or until $150 million worth of NMFC’s outstanding shares of common stock have been

repurchased. To date, approximately $70 million worth of repurchases have been made by the Company under the Repurchase Program.

The Company’s board of directors authorized the extension of

the Repurchase Program because it believes that sustained market volatility and uncertainty may cause NMFC’s common stock to be

undervalued from time to time. The timing and number of shares to be repurchased will depend on a number of factors, including market

conditions and alternative investment opportunities. In addition, any subsequent repurchases will also be conducted in accordance with

the Investment Company Act of 1940, as amended. There are no assurances that the Company will engage in additional repurchases, but if

market conditions warrant, the Company now has an extended period of time to take advantage of situations where NMFC’s management

believes share repurchases would be advantageous to the Company and to its shareholders.

ABOUT NEW MOUNTAIN FINANCE CORPORATION

New Mountain Finance Corporation (NASDAQ: NMFC) is a leading business development

company (BDC) focused on providing direct lending solutions to U.S. middle market companies backed by top private equity sponsors. Our

portfolio consists primarily of senior secured loans, and select junior capital positions, to growing businesses in defensive industries

that offer attractive risk-adjusted returns. Our differentiated investment approach leverages the deep sector knowledge and operating

resources of New Mountain Capital, a global investment firm with over $60 billion of assets under management.

ABOUT NEW MOUNTAIN CAPITAL

New Mountain Capital is a New York-based investment

firm that emphasizes business building and growth, rather than debt, as it pursues long-term capital appreciation. The firm currently

manages private equity, credit and net lease investment strategies with over $60 billion in assets under management. New Mountain seeks

out what it believes to be the highest quality growth

leaders in carefully selected industry sectors

and then works intensively with management to build the value of these companies.

FORWARD-LOOKING STATEMENTS

Statements included herein may contain “forward-looking

statements”, which relate to the Company’s business, including, but not limited to, the timing and the number of shares to

be repurchased, if any, under the Repurchase Program, future operations, future performance or the Company’s financial condition.

Forward-looking statements are not guarantees of future performance, condition or results and involve a number of risks and uncertainties,

including the current conflict between Russia and Ukraine, conflict in the Middle East, changes in base interest rates and significant

volatility on the Company’s business, portfolio companies, the Company’s industry and the global economy. Actual results and

outcomes may differ materially from those anticipated in the forward-looking statements as a result of a variety of factors, including

those described from time to time in the Company’s filings with the Securities and Exchange Commission or factors that are beyond

the Company’s control. The Company undertakes no obligation to publicly update or revise any forward-looking statements made herein,

except as may be required by law. All forward-looking statements speak only as of the time of this press release.

Contact

New Mountain Finance Corporation

Investor Relations

Laura C. Holson, Authorized Representative

NMFCIR@newmountaincapital.com

(212) 220-3505

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