| 1 (19) | China National Petroleum Corp * | CHN |  | |
| 2 (24) | PetroChina Co Ltd | CHN | | |
| 3 (32) | China Petroleum and Chemical Corporation * | CHN | | |
| 4 (140) | China National Offshore Oil Corp * | CHN | | |
| 5 (267) | SINTEF Group * | NOR | | |
| 6 (320) | PowerChina Huadong Engineering Corp Ltd, China | CHN | | |
| 7 (455) | Petrobras * | MUL | | |
| 8 (586) | ExxonMobil * | MUL | | |
| 9 (600) | Petrobras, Brazil | BRA | | |
| 10 (681) | GNS Science | NZL | | |
| 11 (696) | Shell * | MUL | |
