Enstar Group Limited (Enstar) is a holding company. The Company focuses on acquiring and managing insurance and reinsurance companies in run-off, and the acquisition and management of portfolios of insurance and reinsurance business in run-off. Enstar operates its business through four segments: Non-Life Run-Off, Atrium, StarStone, and Life and Annuities. Non-life Run-off segment comprises the operations of its subsidiaries that are running off their property and casualty and other non-life lines of business, including the run-off businesses of StarStone and Arden Reinsurance Company Ltd. (Arden). Atrium segment consists of the active underwriting operations and financial results of Northshore Holdings Limited. StarStone segment consists of the active underwriting operations and financial results of StarStone Holdings. The Life and Annuities Segment consists of the operations of the Company's subsidiaries managing its closed-block of life and annuity business.