Mark James Byrne

Part of Markel Group, Inc., Terra Nova Bermuda Holding Ltd. provides specialty property, casualty, and marine insurance and reinsurance services. The company is based in Hamilton, Bermuda.

Flagstone Reinsurance Holdings SA provides reinsurance services. It provides property catastrophe reinsurance coverage to insurance companies. The firm's policies provide coverage for claims arising from major natural catastrophes, such as hurricanes and earthquakes, in excess of a specified loss. It also provides coverage for claims arising from other natural and man-made catastrophes such as winter storms, freezes, floods, fires and tornados. The company's specialty lines covers risks such as aviation, energy, accident and health, satellite, marine, and workers' compensation catastrophe. Flagstone Reinsurance Holdings was founded by Mark James Byrne and David A. Brown and is headquartered in Luxembourg.

West End Capital Management (Bermuda) Ltd. provides investment management services. The company was founded by Mark James Byrne in 1998 and is headquartered in Hamilton, Bermuda.

Canopius US Holdings, Inc. operates as an insurance and reinsurance company. The company was founded on August 15, 2006 and is headquartered Delaware.

Haverford (Bermuda) Ltd. provides property and casualty reinsurance and insurance services. It provides solutions that help businesses reduce risks and mitigate losses. It focuses on detailed risk analysis and modeling of the proposed portfolios. The company was founded in 1993 by Mark J Byrne and is headquartered in Hamilton, Bermuda.

Island Heritage Insurance Co. Ltd. provides property insurance services. The firm offers motor and home insurance services and customized plans, stock cover, asset protection and new acquisition commercial insurance benefits. The company was founded in 1996 and is headquartered in George Town, Cayman Islands.