Head Office Representation
- American Steamship Owners. Mutual Protection and Indemnity Association Inc.
- Assuranceforeningen Gard (Gjensidig)
- Assuranceforeningen Skuld (Gjensidig)
- The Britannia Steamship Insurance Association Limited
- China Shipowners Mutual Assurance Association
- The International Transport Intermediaries Club
- The Japan Ship Owners' Mutual Protection & Indemnity Association
- The London Steamship Owners' Mutual Insurance Association Limited
- Marine Shipping Mutual Insurance Company Limited
- Noord Nederlandsche Protectie Club
- The North of England Protecting and Indemnity Association Limited
- British Marine
- The Shipowners' Mutual Protection and Indemnity Association (Luxembourg)
- The Shipowners' Mutual Strike Insurance Association (Bermuda) Limited
- The Steamship Mutual Underwriting Association (Bermuda) Limited
- The Standard Steamship Owner's Protection & Indemnity Association (Bermuda)
- Sveriges Angfartygs Assurans Forening
- The through Transport Mutual Insurance Association Limited
- The United Kingdom Freight Demurrage and Defence Association Limited
- The United Kingdom Mutual Steam Ship Assurance Association (Bermuda) Limited
- The West of England Ship Owners Mutual Insurance Association (Luxembourg)