| 1 (4) | China National Petroleum Corp * | CHN |  |
| 2 (6) | PetroChina Co Ltd | CHN | |
| 3 (11) | China Petroleum and Chemical Corporation * | CHN | |
| 4 (16) | Science System and Applications, Inc | USA | |
| 5 (50) | State Grid Corporation of China * | CHN | |
| 6 (81) | China National Offshore Oil Corp * | CHN | |
| 7 (126) | Schlumberger * | MUL | |
| 8 (151) | Chevron Corp | USA | |
| 9 (166) | TotalEnergies * | MUL | |
| 10 (167) | Aramco * | MUL | |
| 11 (211) | TotalEnergies, France | FRA | |
| 12 (236) | Saudi Arabian Oil Co, Saudi Arabia | SAU | |
| 13 (256) | GNS Science | NZL | |
| 14 (306) | Petrobras * | MUL | |
| 15 (313) | Equinor ASA * | MUL | |
| 16 (316) | Saudi Arabian Oil Co, USA | USA | |
| 17 (331) | Shell * | MUL | |
| 18 (334) | Equinor ASA, Norway | NOR | |
| 19 (373) | ExxonMobil * | MUL | |
| 20 (392) | Shell, United States | USA | |
| 21 (418) | Petrobras, Brazil | BRA | |
| 22 (528) | Exploration and Petroleum Engineering Advanced Research Center, SAU | SAU | |
| 23 (562) | Repsol * | MUL | |
| 24 (706) | Daqing Oilfield Co Ltd, CN | CHN | |
| 25 (788) | WSP Global * | MUL | |
| 26 (821) | Shell, Netherlands | NLD | |
| 27 (845) | Lockheed Martin Corp * | USA | |
| 28 (900) | Vale SA * | MUL | |
| 29 (937) | PowerChina Huadong Engineering Corp Ltd, China | CHN | |
| 30 (1042) | China Coal Technology and Engineering Group | CHN | |
| 31 (1057) | Vale SA, Brazil | BRA | |
| 32 (1064) | Gazprom Group, Russian Federation | RUS | |
| 33 (1101) | Gazprom Group * | MUL | |
| 34 (1132) | BGRIMM Technology Group | CHN | |
|
