Conference Call Scheduled for February 24, 2026

Octave Specialty Group, Inc. (NYSE: OSG), a global specialty insurance firm, will release fourth quarter 2025 results on February 23, 2026, following the close of the market.

Conference Call

On February 24, 2026, at 8:30am (ET), Claude LeBlanc, President and Chief Executive Officer, and David Trick, Executive Vice President and Chief Financial Officer, will discuss fourth quarter 2025 results during a live conference call. A live audio webcast of the call will be available through the Investor Relations section of Octave’s website, www.octavegroup.com. Participants may also listen via telephone by dialing (877) 407-9716 (Domestic) or (201) 493-6779 (International).

The webcast will be archived on Octave’s website. A replay of the call will be available through March 10, 2026, and can be accessed by dialing (844) 512-2921 (Domestic) or (412) 317-6671 (International), using ID# 13757987.

About Octave

Octave Specialty Group, Inc. is a global specialty insurance firm that builds, buys, and scales niche insurance distribution and underwriting businesses. With a focus on operational excellence, disciplined growth, and innovation, Octave is creating a harmonized portfolio of companies that deliver exceptional performance and long-term value for shareholders. For more information, visit www.octavegroup.com.

The Amended and Restated Certificate of Incorporation of Octave contains substantial restrictions on the ability to transfer Octave’s common stock. Subject to limited exceptions, any attempted transfer of common stock shall be prohibited and void to the extent that, as a result of such transfer (or any series of transfers of which such transfer is a part), any person or group of persons shall become a holder of 5% or more of Octave’s common stock or a holder of 5% or more of Octave’s common stock increases its ownership interest.

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