Arch Capital Group Ltd. (NASDAQ: ACGL)

Arch Capital Group Ltd. is a Bermuda exempted company that provides insurance reinsurance and mortgage insurance on a worldwide basis. The firm operates through wholly owned subsidiaries and writes specialty lines of property casualty and mortgage products. It is part of the S&P 500 index and reported approximately 26.9 billion in capital at the end of 2025.

Arch Capital Group Ltd. generates revenue primarily through net premiums written from its insurance reinsurance and mortgage operations. In 2025 the company recorded 16.5 billion of net premiums and earned net income available to common shareholders of 4.4 billion. Revenue streams include premiums from specialty property casualty insurance reinsurance and mortgage insurance policies as well as fees from risk sharing transactions and investment income.

The company operates through the following segments: insurance reinsurance and mortgage.

• The insurance segment provides property casualty and specialty lines through subsidiaries such as Arch Insurance Arch Specialty Arch Indemnity Insurance Arch PC and Arch Wilsure in the United States and through Arch Insurance Bermuda Arch Insurance UK Arch Insurance EU and Arch Insurance Canada in other jurisdictions. It writes admitted and non admitted policies and operates through regional offices in Alpharetta Georgia Chicago Illinois New York New York San Francisco California Dallas Texas and additional branch offices. The segment also includes the Lloyd’s syndicates managed by Arch Managing Agency Limited and the recent acquisition of Allianz’s US middle market property and casualty and entertainment business.

• The reinsurance segment offers treaty and facultative reinsurance worldwide via subsidiaries including Arch Re Bermuda Arch Re US Arch Re Europe and the Lloyd’s syndicates. It provides proportional and non proportional coverage on a variety of lines such as property casualty and specialty treaties and maintains operations in Bermuda the United States Ireland and Canada. The segment also includes the internal reinsurance vehicle Arch Group Reinsurance Ltd and engages in retrocession to manage risk.

• The mortgage segment provides mortgage insurance and reinsurance in the United States Europe Australia and participates in government sponsored enterprise credit risk sharing transactions. It operates through entities such as Arch Mortgage Insurance Company United Guaranty Residential Insurance Company Arch Mortgage Guaranty Company Arch Insurance EU and Arch Indemnity and offers primary mortgage insurance lender placed policies and pool structures as well as participation in GSE risk sharing programs.

Arch Capital Group Ltd. holds a strong position in the global specialty insurance and reinsurance markets supported by a substantial capital base and investment grade ratings from major agencies. The company competes with large multinational insurers such as Allianz American International Group Chubb and Zurich as well as specialized peers like Everest Group Markel and RenaissanceRe. In mortgage insurance it faces competitors including Essent Group Enact MGIC NMI and Radian. Competitive advantages derive from its disciplined underwriting expertise sophisticated risk modeling extensive distribution network and ability to originate business across multiple geographies and product lines.

Arch Capital Group Ltd. serves a broad range of customers including individual policyholders small and medium sized enterprises large corporations mortgage lenders banks and other insurance and reinsurance companies. Its mortgage business relies heavily on relationships with loan originators and financial institutions while its insurance and reinsurance lines are distributed through brokers and agents worldwide.