1. Arsol Aromatics GmbH & Co. KG
2. BASF SE
3. Borealis AG
4. BP International Limited
5. China National Petroleum Corporation
6. China Petrochemical Corporation
7. ENEOS Corporation
8. Exxon Mobil Corporation
9. Flint Hills Resources
LLC by Koch Industries Inc.
10. LG Chem Ltd.
11. Marathon Petroleum Corporation
12. Mitsubishi Chemical Corporation
13. Repsol
S.A.
14. Saudi Basic Industries Corporation
15. Shell PLC