| Company Name | Entity type | Parent/Subsidiary/Independent | Headquarters | No. of Employees | Annual Revenue ($M) | |
|---|---|---|---|---|---|---|
| China Petroleum & Chemical Corp | Public | Subsidiary (of China Petrochemical Corp) | China | 374,791 | 493,159 | |
| PetroChina Co Ltd | Public | Subsidiary (of China National Petroleum Corp) | China | 386,912 | 481,417 | |
| China Petrochemical Corp | Government | Parent | China | XYZ | 432,484 | |
| Shell plc | Public | Parent | United Kingdom | 93,000 | 381,314 | |
| Niagara Peninsula Energy Inc | Private | Independent | Canada | XYZ | XYZ | |
| TotalEnergies SE | Public | Parent | France | 101,279 | 263,310 | |
| Chevron Corp | Public | Parent | United States of America | 43,846 | 235,717 | |
| Marathon Petroleum Corp | Public | Parent | United States of America | 17,800 | 178,891 | |
| Valero Energy Corp | Public | Parent | United States of America | 9,716 | 176,383 | |
| Phillips 66 | Public | Parent | United States of America | 13,000 | 169,990 | |
| Eni SpA | Public | Parent | Italy | 32,324 | 139,340 | |
| Lukoil Oil Co | Public | Parent | Russia | 102,424 | 128,089 | |
| Petroleo Brasileiro SA | Public | Parent | Brazil | 45,149 | 124,219 | |
| Rosneft Oil Co | Public | Parent | Russia | 334,600 | 118,937 | |
| Petroleos Mexicanos | Government | Parent | Mexico | 120,054 | 118,562 | |
| ENEOS Holdings Inc | Public | Parent | Japan | 44,617 | 110,937 | |
| Reliance Industries Ltd | Public | Parent | India | 389,414 | 113,586 | |
| Peninsula Energy Ltd | Public | Parent | Australia | XYZ | XYZ | |
| PTT Public Co Ltd | Public | Parent | Thailand | 30,628 | 96,213 | |
| Raizen SA | Public | Parent | Brazil | 44,738 | 47,621 | |
| Oil and Natural Gas Corp Ltd | Public | Parent | India | 25,993 | 87,273 | |
| Petroliam Nasional Bhd | Government | Parent | Malaysia | 49,771 | 85,344 | |
| Siemens Energy AG | Public | Parent | Germany | 94,000 | 32,722 | |
| PT Pertamina (Persero) | Government | Parent | Indonesia | 33,596 | 84,888 | |
| Repsol SA | Public | Parent | Spain | 25,050 | 79,025 | |
| ConocoPhillips | Public | Parent | United States of America | 9,700 | 78,494 | |
| Jizhong Energy Group Co Ltd | Private | Parent | China | XYZ | XYZ | |
| Idemitsu Kosan Co Ltd | Public | Parent | Japan | 14,363 | 69,859 | |
| CNOOC Ltd | Public | Subsidiary (of China National Offshore Oil Corp) | China | 21,452 | 62,753 | |
| Orlen SA | Public | Parent | Poland | 64,494 | 62,305 | |
| Hindustan Petroleum Corp Ltd | Public | Subsidiary (of Oil and Natural Gas Corp Ltd) | India | 8,504 | 59,449 | |
| World Kinect Corp | Public | Parent | United States of America | 5,214 | 59,043 | |
| Plains All American Pipeline LP | Public | Subsidiary (of Plains GP Holdings LP) | United States of America | 4,100 | 57,342 | |
| Plains GP Holdings LP | Public | Parent | United States of America | XYZ | 57,342 | |
| Enterprise Products Partners LP | Public | Parent | United States of America | 7,300 | 58,186 | |
| QatarEnergy | Government | Parent | Qatar | XYZ | 52,256 | |
| Cenovus Energy Inc | Public | Parent | Canada | 5,998 | 51,400 | |
| Umicore NV/SA | Public | Parent | Belgium | 11,942 | 26,746 | |
| Suncor Energy Inc | Public | Parent | Canada | 16,558 | 44,822 | |
| Constellation Energy Corp | Public | Parent | United States of America | XYZ | XYZ | |
| Vattenfall AB | Private | Parent | Sweden | 19,638 | 23,697 | |
| EDF Energy Holdings Ltd | Private | Subsidiary (of Electricite de France SA) | United Kingdom | XYZ | 16,886 | |
| Korea Gas Corp | Public | Parent | South Korea | 3,505 | 40,066 | |
| HF Sinclair Corp | Public | Parent | United States of America | XYZ | XYZ | |
| Ecopetrol SA | Public | Parent | Colombia | 9,150 | 37,505 | |
| Occidental Petroleum Corp | Public | Parent | United States of America | 11,973 | 36,787 | |
| HollyFrontier Corp | Private | Subsidiary (of HF Sinclair Corp ) | United States of America | 5,223 | 38,205 | |
| Naturgy Energy Group SA | Public | Parent | Spain | 7,112 | 35,715 | |
| Vibra Energia SA | Public | Parent | Brazil | 3,364 | 35,148 | |
| Puma Energy Holding Pte Ltd | Private | Joint Venture | Singapore | 3,137 | 15,897 |
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