Exhibit 15.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statement (No. 333-271270) on Form S-8 of our reports dated March 11, 2025, with respect to the consolidated financial statements of Fidelis Insurance Holdings Limited and the effectiveness of internal control over financial reporting.

/s/ KPMG Audit Limited

Hamilton, Bermuda

March 11, 2025