|Markel Corporation is a financial holding company serving a range of markets. The Company markets and underwrites specialty insurance products. The Company operates in three segments: the Excess and Surplus Lines, the Specialty Admitted, and the London markets. It also owns interests in industrial and service businesses, which operate outside of the specialty insurance marketplace. On January 1, 2012, the Company acquired Thompson Insurance Enterprises, LLC (THOMCO). On July 13, 2011, the Company acquired PartnerMD, LLC. In April 2012, its subsidiary, Markel Ventures, acquired a majority interest in Havco WP LLC. In July 2012, Markel Corporation announced that Ellicott Dredge Enterprises, LLC, through its subsidiary Rohr International Dredge Holdings, Inc., acquired IDRECO GmbH. In January 2013, OneBeacon Insurance Group Ltd sold Essentia Insurance Company to the Company. In May 2013, it announced that it has completed its acquisition of Alterra Capital Holdings Ltd.