Item Submission New Mountain Finance Corporation (“ NMFC Annual Meeting Record Date Election of Directors:

Item Financial (d) Exhibits. Exhibit 104 Cover Page Interactive SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. New By: /s/ Name: Eric Title: Corporate Date: May 20, 2025