The primary defendants include Syngenta Crop Protection, LLC., Syngenta AG, Growmark, and Chevron U.S.A., Inc. Syngenta Crop Protection, LLC., Syngenta AG, and Growmark, are the manufacturers of Paraquat and are headquartered in Basel, Switzerland. U.S.A., Inc. distributed and sold Paraquat under the Brand name Gramoxone in the United States pursuant to an agreement with Imperial Chemical Industries (ICI)—a predecessor to the Syngenta companies.