Platinum Underwriters Holdings, Ltd. (Platinum Holdings) is a holding company. Through its reinsurance subsidiaries the Company provides property and marine, casualty and finite risk reinsurance coverage to a diverse clientele of insurers and select reinsurers on a worldwide basis. The Company operates through two licensed reinsurance subsidiaries: Platinum Underwriters Bermuda, Ltd. (Platinum Bermuda), a Bermuda reinsurance company, and Platinum Underwriters Reinsurance, Inc. (Platinum US), a United States reinsurance company. Platinum Bermuda is a wholly owned subsidiary of Platinum Holdings and Platinum US is a wholly owned subsidiary of Platinum Finance. The Company operates in three segments: Property and Marine, Casualty and Finite Risk. The Property and Marine provides insurance coverage against loss of property. Casualty provides coverage for loss or damage to persons or property. The Finite Risk offers non-traditional reinsurance.