New Mountain Finance Corp

0001496099 FALSE 0001496099 2026-08-03 2026-08-03 0001496099 us-gaap:CommonStockMember 2026-08-03 2026-08-03 0001496099 nmfc:EightPointTwoFivePercentageNotesDueTwoThousandTwentyEightMember 2026-08-03 2026-08-03 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 3, 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 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 ☐ 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 2.02. Results of Operations and Financial Condition On August 3, 2026, New Mountain Finance Corporation (“NMFC” or the “Company”) issued a press release announcing financial results for its quarter ended June 30, 2026. The press release is included as Exhibit 99.1 hereto and incorporated herein by reference. The information disclosed under this Item 2.02, including Exhibit 99.1 hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, (the “Exchange Act”) or otherwise subject to the liabilities of that section. The information provided herein shall not be deemed incorporated by reference into any filing made under the Securities Act of 1933, as amended, (the “Securities Act”) except as expressly set forth by specific reference in such filing. Item 7.01. Regulation FD Disclosure On August 3, 2026, NMFC issued a press release, included herewith as Exhibit 99.1, announcing the declaration of a third quarter 2026 distribution of $0.25 per share, payable on September 30, 2026 to holders of record as of September 16, 2026. Additionally, on August 3, 2026, NMFC made available on its website, http://www.newmountainfinance.com, a supplemental investor presentation with respect to the earnings release. The information disclosed under this Item 7.01, including Exhibit 99.1 hereto, is being furnished and shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liabilities of that section. The information provided herein shall not be deemed incorporated by reference into any filing made under the Securities Act, except as expressly set forth by specific reference in such filing. Item 9.01. Financial Statements and Exhibits. d) Exhibits. Exhibit Number Description 99.1 Press Release, dated August 3, 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: August 3, 2026 By: /s/ Eric Kane Name: Eric Kane Title: Corporate Secretary