Affiliates and Subsidiaries

These Arch subsidiaries provide insurance and/or reinsurance in their respective markets. Learn about each organization individually.


Arch Underwriters Inc.

Arch Underwriters Inc. (AUI) is a licensed property and casualty insurance agency and an affiliate of Arch Insurance Group Inc.

McNeil & Co.

In the U.S., McNeil & Company provides specialized products, risk management, underwriting and claims expertise across a variety of business sectors. McNeil offers comprehensive insurance coverages and customized insurance packages.


RoamRight provides travel protection plans for leisure, business, student and group travelers through its partner suppliers as well as directly to U.S. consumers. Coverage is available for domestic and international trips.


Thimble is a leading insurtech platform for small business customers and agents. Thimble enables small businesses to quickly get insurance coverage by the job, month or year using its award-winning app, website, or over the phone.


Ventus Risk Management is a managing general underwriter in the U.S. The company provides coastal commercial property insurance solutions to small and midsized enterprises on behalf of third-party carrier partners.


Somers Re Ltd.

Somers Re Ltd. is a global specialty property and casualty insurance and reinsurance company. Somers Re delivers flexible, creative solutions to clients worldwide.

Somerset Bridge Group

Somerset Bridge Group primarily operates under the GoSkippy trading style together including a managing general agent and an award-winning UK claims handler.