1. BP Plc
2. Chevron Corporation
3. China Petroleum Corporation
4. Exxon Mobil Corporation
5. Indian Oil Corporation Ltd.
6. Lotte Chemical Corporation
7. Mangalore Refinery and Petrochemicals Limited
8. Mitsubishi Chemical Corporation
9. Nova Chemicals Corporation
10. PDV LLC
11. Petr?leos Mexicanos
12. Reliance Industries Limited
13. SABIC
14. Total SA
15. Vitol Group