Ambac Financial Group, Inc. (NYSE: AMBC) operates as a financial services holding company focused on specialty property and casualty insurance and insurance distribution; its core businesses encompass managing general agents and underwriters (MGAs/MGUs), a wholesale broker, program insurance carriers such as Everspan, and underwriting services in lines including property, niche specialty risk, accident and health, miscellaneous specialty, reinsurance, surety, marine and energy, specialty auto, and directors and officers professional liability. Founded in 1971 as the American Municipal Bond Assurance Corporation in Milwaukee, Wisconsin, the company is headquartered at One World Trade Center in New York City and manages a legacy financial guarantee portfolio in runoff alongside its expanding P&C platform targeting niche commercial and personal liability risks primarily in the United States, United Kingdom, and Bermuda markets. Recent strategic developments include the 2024 acquisition of a majority stake in UK-based Beat Capital Partners to bolster its MGA platform and international underwriting capabilities; the October 2025 completion of the $250 million purchase of ArmadaCare, a specialty accident and health MGA, from SiriusPoint Ltd. to enhance distribution and A&H segments; and the extension through December 31, 2025, of its agreement to sell legacy financial guarantee businesses Ambac Assurance Corporation and Ambac UK to Oaktree Capital Management for $420 million, advancing its pivot to a pure-play specialty P&C insurer.