XL Group Ltd. is a holding company, which engages in the provision of general insurance services. The company operates in two segments: Insurance and Reinsurance. The Insurance segment provides commercial property, casualty and specialty insurance products on a global basis. The Reinsurance provides casualty, property risk, property catastrophe, specialty, and other reinsurance lines on a global basis with business being written on both a proportional and non-proportional treaty basis and also on a facultative basis. XL Group was founded in 1986 and is headquartered in Hamilton, Bermuda.