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Exhibit 24.1

POWER OF ATTORNEY

KNOW ALL PERSONS BY THESE PRESENT, that each person whose signature appears below constitutes and appoints each of Lawrence Metz and William J. White, as such person's true and lawful attorney-in-fact and agent, each with full power of substitution and resubstitution, for such person and in their name, place and stead, in any and all capacities, to sign Octave Specialty Group, Inc.’s Annual Report on Form 10-K for the year ended December 31, 2025 to be filed with the Securities and Exchange Commission and any and all amendments thereto, and any and all instruments and documents filed as a part of or in connection with said Form 10-K or amendments thereto, and does hereby grant unto each said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as such person might or could do in person, hereby ratifying and confirming all that each said attorney-in-fact and agent shall do or cause to be done by virtue hereof.

Signature

Title

Date

/S/ JEFFREY S. STEIN

Chairman of the Board and Director

March 4, 2026

Jeffrey S. Stein

/S/ CLAUDE LeBLANC

President, Chief Executive Officer and Director

March 4, 2026

Claude LeBlanc

(Principal Executive Officer)

/S/ DAVID TRICK

Executive Vice President and Chief Financial Officer

March 4, 2026

David Trick

(Principal Financial Officer)

/S/ CRISTINA AHN

Chief Accounting Officer

March 4, 2026

Cristina Ahn

(Principal Accounting Officer)

/S/ IAN D. HAFT

Director

March 4, 2026

Ian D. Haft

/S/ LISA G. IGLESIAS

Director

March 4, 2026

Lisa G. Iglesias

/S/ JOAN LAMM -TENNANT

Director

March 4, 2026

Joan Lamm-Tennant

/S/ KRISTI A. MATUS

Director

March 4, 2026

Kristi A. Matus

/S/ MICHAEL D. PRICE

Director

March 4, 2026

Michael D. Price