Platinum Underwriters Holdings, Ltd. is a reinsurance holding company that provides casualty and finite reinsurance coverages to a diverse clientele of insurers and select reinsurers on a worldwide basis. The Company operates through its licensed operating subsidiaries: Platinum Bermuda, Platinum US and Platinum UK. Platinum Underwriters has organized its worldwide reinsurance business around three operating segments: global property and marine, global casualty and finite risk. In each of its operating segments, the Company offers its reinsurance solutions to providers of commercial and personal lines of insurance. It underwrites substantially all of its reinsurance through brokers. Although it will, on occasion, write business directly with ceding companies, its preference is to support the broker channels. The Company underwrites substantially all of its reinsurance business through treaties, rather than on a facultative basis.