1. Petronas Carigali Sdn Bhd
2. PC Overseas Sdn Bhd, Ethiopia
3. PC Vietnam Ltd
4. PC Myanmar (Hong Kong) Ltd
5. Petronas Carigali (Turkmenistan) Sdn Bhd
6. Petronas Dagangan Berhad
7. Petronas Methanol (Labuan) Sdn Bhd
8. PCPP Operating Company Sdn Bhd
9. Carigali Hess Operating Company Sdn Bhd
10. Carigali-PTTEPI Operating Company Sdn Bhd
11. Carigali-Triton Operating Company Sdn Bhd
12. Sarawak Shell Berhad
13. Sabah Shell Berhad
14. Exxon Mobil Exploration and Production Inc Malaysia
15. Murphy Oil Ltd
16. Talisman Energy Inc
17. White Nile Petroleum Operating Company
18. CS Mutiara Petroleum Sdn Bhd
19. Korea National Oil Corporation
20. Newfield Sarawak Malaysia Inc.
21 Newfield Peninsula Malaysia Inc
22 Nippon Oil Exploration (Malaysia) Ltd..
23. Petrofac (Malaysia-PM304) Limited
24. Malaysian International Trading Corpn. (Japan) Sdn Bhd
25. PTT Exploration and Production Public Company Ltd.
26. Clough Uni Thai Engineering Ltd.
27. Thai Nippon Steel Co. Ltd.
28. Pan Orient Company Ltd.
29. Pearl Oil Company Ltd
30. SHEDDENUHDE Co. Ltd.
31. CTCI Co. Ltd.
32. Nucoastal Thailand Co. Ltd.
33. Pear Oil (Sebuku) Ltd.
34. Pearl Oil (Tungkal) Ltd.
35. Pearl Oil (Salawati) Ltd.
36. PT. Pertalahan Arnebatara Natuna
37. MODEC Management Service Pte, Ltd
38. GLOW SSP Public Company Limited
39. TECHNIP
40. HYUNDAI Heavy Industries Co, Ltd
41. CUEL
42. CNPCHK (Thailand ) Limited
43. TOYO-THAI Corporation Ltd.
44. CHEVRON
45. DEMCO Public Company Limited
46. DENSO (Thailand ) Co., Ltd
47. FOSTER Wheeler