Octave Specialty Group Inc. OSG

What this company does

Octave Specialty Group, Inc. underwrites and distributes property and casualty insurance through managing general agents and underwriters and an insurance broker, and separately underwrites specialty property and casualty insurance policies through program insurer carriers. As of December 31, 2025, the company had 275 employees in the United States and Bermuda and 208 employees in the United Kingdom. The company reports Insurance Distribution and Specialty Property & Casualty Insurance as its two business segments. On October 31, 2025, the company acquired ArmadaCorp Capital, LLC for a purchase price of $250 million, funded in part by $120 million of loans obtained under new credit facilities. As of December 31, 2025, Everspan's specialty property and casualty insurance program business included four wholly-owned admitted carriers and a fifth carrier, Everspan Indemnity Insurance Company, that writes business as an excess and surplus lines carrier in all U.S. states and territories. Octave Specialty Group, Inc. was incorporated in the State of Delaware on April 29, 1991 and was formerly known as Ambac Financial Group, Inc. until it changed its name and rebranded as OSG in the fourth quarter of 2025 in connection with the sale of its Legacy Financial Guarantee business.

Written from the business description in Octave Specialty Group, Inc.'s annual report to the U.S. Securities and Exchange Commission, filed 4 March 2026. Every sentence was checked against that document before publication.