Octave Specialty Group, Inc. (NYSE:OSG), a global specialty insurance firm, today announced that Octave's 2026 Annual Meeting of Stockholders will be held on Thursday, May 28, 2026, at 11 a.m. (ET). The meeting will be held in a virtual format. The record date for determining stockholders entitled to notice of, and to vote at, the annual meeting will be the close of business on April 2, 2026.

Further information regarding the Annual Meeting will be set forth in the proxy statement and other proxy materials for the Annual Meeting.

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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Investors:

Karen Beyer

Managing Director, Investor Relations

kbeyer@octavegroup.com

Media:

Kate Smith

Director, Corporate Communications

ksmith@octavegroup.com

Octave Specialty Group Announces Meeting and Record Date for 2026 Annual Meeting of Stockholders