Advanced Petrochemical Company Akro-Plastıc Gmbh Celamese Sales Germany Gmbh Chevron Phillips Chemical Company Llc Covestro Deutschland Ag Exxonmobil Formosa Plastics Corporation Hanwha Totalenergies Petrochemical Co., Ltd. Hıp Petrohemija Hyundaı Idemitsu Kosan Co., Ltd. Kazakhstan Petrochemical Industries Inc Kumho Polychem Co., Ltd. Lotte Chemical Corporation Lyondellbasell Industries Qatar Petrochemical Company Repsol Sahara International Petrochemical Company Saudi Basic Industries Corporation Shell Usa, Inc Sibur Holding Sk Geo Centric The Sanmar Group Totalenergies Uz-Kor Gas Chemical Versalis S.P.A. Vinmar Yuhwa Korea Petrochemical Ind. Co., Ltd.