Articles from Octave Specialty Group, Inc.

Octave Specialty Group, Inc. (NYSE: OSG) today announced that as a result of a review process, the Audit Committee of its Board of Directors has approved the engagement of Ernst & Young LLP (“EY”) as the Company’s independent registered public accounting firm for the Company’s fiscal year ended December 31, 2026, subject to completion of EY’s client acceptance procedures and the execution of an engagement letter. KPMG LLP (“KPMG”), the Company’s current independent registered public accounting firm, will continue as the Company’s independent registered public accounting firm until the filing of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025. The review process was not related to any disagreement between the Company and KPMG.

Ambac Financial Group, Inc. (NYSE: AMBC) today announces it has rebranded to Octave Specialty Group, Inc. (“Octave”), marking the next phase of its transformation into a leading specialty insurance platform. The company will begin trading under its new ticker symbol “NYSE: OSG” on November 20, 2025.