Arch Capital Group Ltd., together with its subsidiaries, provides property, casualty, and mortgage insurance and reinsurance products worldwide. Its Insurance segment offers primary and excess casualty coverages; loss sensitive primary casualty insurance programs; collateral protection, debt cancellation, and service contract reimbursement products; directors' and officers' liability, errors and omissions liability, employment practices and fiduciary liability, crime, professional indemnity, and other financial related coverages; medical professional and general liability insurance coverages; and workers' compensation and umbrella liability, as well as commercial automobile and inland marine products. It also provides property, energy, marine, and aviation insurance; travel insurance; accident, disability, and medical plan insurance coverages; captive insurance programs; employers' liability insurance coverages; and contract and commercial surety coverages. This segment markets its products through a group of licensed independent retail and wholesale brokers. The company's Reinsurance segment provides reinsurance for third party liability and workers' compensation exposures; marine and aviation reinsurance; reinsurance protection for catastrophic losses and commercial property risks; life reinsurance; casualty clash; risk management solutions; and surety, accident and health, workers' compensation catastrophe, agriculture, trade credit, and political risk products. This segment markets its reinsurance products through brokers, and directly to ceding companies. Its Mortgage segment offers private mortgage insurance covering one-to-four family residential mortgages; mortgage insurance to cover previously originated residential loans; quota share reinsurance; and risk-sharing products. This segment sells its products through direct basis and through brokers to its bank and credit union customers. The company was founded in 1995 and is based in Pembroke, Bermuda.