Smithfield Foods
…the United States, leaving Smithfield in control of 10–15 percent of the country's hog production. As of 2006 four companies—Smithfield, Tyson Foods, Swift & Company, and Cargill—were responsible for the production of 70 percent of pork in the United States. On May 29, 2013, WH Group, then known as Shuanghui Group…