1. The Shell Petroleum Development Company of Nigeria Limited. (SPDC Lagos, Warri and Port Harcourt)

2. Total Exploration & Production Nigeria Limited

3. ExxonMobil

4. Nigeria Agip Oil Company Limited (NAOC)

5. Agip Energy and Natural Resources Nigeria Limited (AENR)

6. Nigerian National Petroleum Corporation

7. Aluminum Smelter Company of Nigeria Limited (ALSCON)

8. Michelin Nigeria Limited

9. Protrack Shipping Nigeria Limited

10. New Genesis Executive Security Limited

11. Nigeria Liquefied Natural Gas Limited, Bonny (NLNG)

12. Ponticelli Nigeria Limited

13. Solstad Offshore

14. Profield Nigeria Limited for Enterprise Philippe Lassarat S.A.

15. Craig Group

16. Pangasari Services Singapore/APAC Foods and Services

17. Nigeria LNG

18. CSoffshore

19. International Petroleum Company (IPCO)