OCTAVE SPECIALTY GROUP INC

For the period ended Dec 31, 2025. Filed Mar 4, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 4, 2026

OSG$4.99-2.9%Stored close · as of Nov 6, 2026

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Contents

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		OCTAVE SPECIALTY GROUP, INC.
Dated:	March 4, 2026	By:	/S/ DAVID TRICK
			David Trick
			Executive Vice President and Chief Financial Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Jeffrey S. Stein
Signature	Title	Date
/S/ JEFFREY S. STEIN*	Chairman of the Board and Director	March 4, 2026
/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
/S/ LAWRENCE F. METZ	Attorney-in-fact	March 4, 2026
*By: Lawrence F. Metz

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