1. BP P.L.C.
2. Chevron Corporation
3. Exxon Mobil Corporation
4. Gulf Chemicals and Industrial Oils Company
5. HCS Holding GmbH
6. Kuwait Petroleum Corporation
7. Merck KGaA
8. PetroChina Company Limited by China National Petroleum Corporation
9. Reliance Industries Limited
10. Royal Dutch Shell PLC
11. Sasol Limited
12. Saudi Basic Industries Corporation
13. Savita Oil Technologies Ltd.
14. SK Global Chemical Co. Ltd.
15. Univar Solutions Inc.