1. BASF AG
2. CELANESE CORPORATION
3. QATAR FUEL ADDITIVES COMPANY LIMITED
4. METHANOL HOLDINGS (TRINIDAD) LIMITED (MHTL)
5. METHANEX CORPORATION
6. MITSUBISHI CHEMICALS
7. MITSUI & CO. LTD.
8. PETROLIAM NASIONAL BERHAD (PETRONAS)
9. SAUDI BASIC INDUSTRIES CORPORATION
10. TEIJIN
11. VALERO MARKETING AND SUPPLY COMPANY
12. ZAGROS PETROCHEMICAL COMPANY (ZPC)