JBS USA (Colorado state) : The largest processor of fresh beef and pork in the United States.

JBS USA is based in Greeley, Colorado. Its competitors include Cargill, Smithfield Foods, and Tyson Foods.

JBS USA's operations can be traced back to 1855, when 16-year-old Gustavus Franklin Swift founded a butchering operation in Eastham, Massachusetts.

That same year, an antitrust lawsuit was filed against Swift for conspiring with other companies to control the meatpacking industry. The companies attempted to merge to avoid the suit, leading to the 1905 Supreme Court case of Swift & Co. v. United States.

According to wikipedia