Company: NMFCZ
Filing Date: 2025-05-23
Form Type: 40-17G
Source: 0001580642-25-003281
Chunk: 0

Company: New Mountain Finance Corp
Filing Date: 2025-05-23
Form: 40-17G
Chunk 0
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May 23, 2025

Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549-0505

| Re: | New Mountain Finance Corporation (File No. 814-00832)       |
|     | Rule 17g-1(g) Fidelity Bond - (Bond No. P-001-001174679-03) |

Dear Sir or Madam:

Enclosed for filing on behalf of New Mountain Finance
Corporation (the “Company”), pursuant to Rule 17g-1(g) under the Investment Company Act of 1940, as
amended (the “1940 Act”) please find the following:

| 2) | A Certificate of the Secretary of the Company containing the resolutions which were adopted by the Board                   
 of Directors of the Company (the “Board”), and a majority of the members thereof who are not “interested                   
 persons” (as defined in Section 2(a)(19) under the 1940 Act) of the Company, approving the amount, type, form and coverage 
 of the Bond, and a statement as to the period for which premiums have been paid, attached as Exhibit B.                    |

The Company has paid a premium for a $3.2 million bond
for the policy period May 19, 2025 to May 19, 2026.

If you have any questions, please do not hesitate
to contact me at 212-367-2716.

| Sincerely,          |
| /s/ Eric Kane       |
| Eric Kane           |
| Corporate Secretary |

| 1 |

<div align='center'>Exhibit A</div>

| FINANCIAL        
 INSTITUTION BOND |

<div align='center'>STATE FRAUD STATEMENT

NEW YORK</div>

Any person who knowingly and with intent to defraud any insurance company or other person files an application for insurance or statement of claim containing any materially false information, or conceals for the purpose of misleading, information concerning any fact material thereto, commits a fraudulent insurance act, which is a crime, and shall also be subject to a civil penalty not to exceed five thousand dollars and the stated value of the claim for each such violation.

| AXIS     
 104 0415 | Page   
 1 of 1 |

| FINANCIAL        
 INSTITUTION BOND |

<div align='center'>POLICYHOLDER NOTICE

ECONOMIC AND TRADE SANCTIONS</div>

This Notice provides information concerning