Ambac Financial Group is a financial services holding company. Co.'s business operations include: Financial Guarantee Insurance, which includes Ambac Assurance Corporation and its wholly owned subsidiary, Ambac Assurance UK Limited , which are financial guarantee insurance carriers; Specialty Property & Casualty Program Insurance, which includes excess and surplus lines insurer Everspan Indemnity Insurance Company and admitted insurer Everspan Insurance Company; and Managing General Agency / Underwriting, which includes Xchange Benefits, LLC and Xchange Affinity Underwriting Agency, LLC, a property and casualty Managing General Underwriter.