Leucadia National Corporation (Leucadia) is a holding company. The Company, through its subsidiaries, is engaged in a variety of businesses, including beef processing, manufacturing, land based contract oil and gas drilling, gaming entertainment, real estate activities, medical product development and winery operations. The Company also has an investment in Jefferies Group, Inc. (Jefferies), a full-service investment bank and Mueller Industries, Inc. (Mueller), a manufacturer of copper, brass, plastic and aluminum products. In December 2011, the Company acquired 78.9% of National Beef Packing Company, LLC (National Beef). On July 1, 2011, it acquired Prudential Bache�s Global Commodities Group (Global Commodities Group or Jefferies Bache) from Prudential Financial Inc. (Prudential). During the year ended December 31, 2011, the Company acquired approximately 37% interest in Linkem S.p.A. During 2011, it acquired 27.3% interest in Mueller.