Insider linked to New Mountain Finance (NMFC) buys 237,873 shares at $8.10

Rhea-AI Filing Summary

New Mountain Finance Corp director and 10% owner Steven B. Klinsky reported indirect open-market purchases of a total of 237,873 shares of the company’s common stock at a price of $8.10 per share on March 5, 2026.

The purchases were made through entities associated with him, including various trusts such as the Steven B. Klinsky 2008 Long Term Trust, the Steven B. Klinsky Non-GST Exempt Trust, and several 2024 Revocable Trusts. The filing notes that he disclaims beneficial ownership of many of these indirectly held shares except to the extent of his pecuniary interest, and it also references shares previously acquired under the dividend reinvestment plan.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

KLINSKY STEVEN B

(Last) (First) (Middle)

C/O NEW MOUNTAIN CAPITAL, L.L.C.

1633 BROADWAY, 48TH FLOOR

(Street)

NEW YORK NY 10019

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
New Mountain Finance Corp [ NMFC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
03/05/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock								116,823.91(1)	D
Common Stock	03/05/2026		P		79,291	A	$8.1	1,298,444	I	See Note(2)
Common Stock								1,020,267	I	See Note(3)
Common Stock								11,191	I	See Note(4)
Common Stock								11,175	I	See Note(5)
Common Stock								11,175	I	See Note(6)
Common Stock								11,175	I	See Note(7)
Common Stock	03/05/2026		P		158,582	A	$8.1	5,037,524	I	See Note(8)
Common Stock								3,457,379	I	See Note(9)
Common Stock								855,000	I	See Note(10)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Includes shares previously acquired under the New Mountain Finance Corporation dividend reinvestment plan.

2. The Steven B. Klinsky 2008 Long Term Trust directly owns these shares. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

3. The Steven B. Klinsky Non-GST Exempt Trust directly owns these shares. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

4. Includes (i) 16 shares held directly and (ii) 11,175 shares held indirectly through a trust by an immediate family member of the reporting person. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

5. Shares are held indirectly through a trust by an immediate family member of the reporting person. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

6. Shares are held indirectly through a trust by an immediate family member of the reporting person. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

7. Shares are held indirectly through a trust by an immediate family member of the reporting person. The reporting person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.

8. The Steven B. Klinsky 2024 Revocable Trust ("2024 Trust 1") directly owns these shares. The reporting person disclaims beneficial ownership held by 2024 Trust 1 except to the extent of his pecuniary interest therein.

9. The Steven B. Klinsky 2024 Revocable Trust ("2024 Trust 2") directly owns these shares. The reporting person disclaims beneficial ownership held by 2024 Trust 2 except to the extent of his pecuniary interest therein.

10. The Steven B. Klinsky 2024 Revocable Trust ("2024 Trust 3") directly owns these shares. The reporting person disclaims beneficial ownership held by 2024 Trust 3 except to the extent of his pecuniary interest therein.

	Steven B. Klinsky	03/06/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What insider buying did Steven B. Klinsky report for New Mountain Finance Corp (NMFC)?

The filing reports that entities associated with Steven B. Klinsky purchased a total of 237,873 shares of New Mountain Finance Corp common stock. These were indirect open-market purchases attributed to various trusts and related entities connected to Klinsky, rather than directly to him personally.

At what price were the NMFC shares purchased in this Form 4 filing?

The reported open-market purchases were made at a price of $8.10 per share. This single purchase price applied to both reported transactions, resulting in a combined acquisition of 237,873 shares of New Mountain Finance Corp common stock at that stated per-share price.

How is Steven B. Klinsky’s ownership in New Mountain Finance Corp structured in this filing?

Ownership is spread across direct and indirect holdings, with many shares held through trusts such as the Steven B. Klinsky 2008 Long Term Trust, the Non-GST Exempt Trust, and 2024 Revocable Trusts. The filing states Klinsky disclaims beneficial ownership of many indirectly held shares except for his pecuniary interest.

Does the NMFC Form 4 show any insider sales by Steven B. Klinsky or related entities?

No insider sales are reported in this Form 4; the transaction summary shows two buy transactions totaling 237,873 shares and zero sales. Additional lines in the filing describe updated direct and indirect holdings but do not list any common stock dispositions.

What does the dividend reinvestment plan reference mean in the NMFC Form 4?

One footnote explains that some shares were previously acquired under the New Mountain Finance Corporation dividend reinvestment plan. This indicates a portion of the reported holdings comes from automatically reinvested dividends, adding to the total share count without separate open-market purchase transactions.

Why does the NMFC Form 4 say Steven B. Klinsky disclaims beneficial ownership of certain shares?

Several footnotes state that shares are held by specific trusts or by an immediate family member through trusts, and that Klinsky disclaims beneficial ownership except to the extent of his pecuniary interest. This clarifies legal and economic ownership where trusts or relatives directly hold the stock.