Arch Capital Group Ltd. (ACGL) writes insurance and reinsurance on a worldwide basis. ACGL operates in two underwriting segments: insurance and reinsurance. Its insurance operations are conducted in Bermuda, the United States, Europe, Canada, Australia and South Africa. Its insurance operations in Bermuda are conducted through Arch Insurance (Bermuda), a division of Arch Re Bermuda. In the United States, its insurance group's principal insurance subsidiaries are Arch Insurance Company (Arch Insurance), Arch Excess & Surplus Insurance Company (Arch E&S), Arch Specialty Insurance Company (Arch Specialty), and Arch Indemnity Insurance Company (Arch Indemnity). Its reinsurance operations are conducted on a worldwide basis through its reinsurance subsidiaries, Arch Reinsurance Ltd. (Arch Re Bermuda), Arch Reinsurance Company (Arch Re U.S.), including treaty and property facultative reinsurance operations) and Reinsurance Europe Underwriting Limited (Arch Re Europe).