On a corporate action affecting ordinary shares of Ambac Financial Group, Inc. (AMBC)

On November 10, 2025, Ambac Financial Group, Inc. announced the plans to change its name to “Octave Specialty Group, Inc.”. The company will begin trading under its new ticker symbol “OSG” on November 20, 2025. For more details, please, refer to the company’s website.

ITS Ltd. will publish separate notices on the procedures undertaken by ITS Ltd. to process this corporate action outlining how trading in these qualified investments will be carried out.