| Company Name | Entity type | Parent/Subsidiary/Independent | Headquarters | No. of Employees | Annual Revenue ($M) | |
|---|---|---|---|---|---|---|
| Firebird Energy Inc | Private | Independent | Canada | XYZ | XYZ | |
| Firebird Energy LLC | Private | Subsidiary (of Diamondback Energy Inc ) | United States of America | XYZ | XYZ | |
| PetroChina Co Ltd | Public | Subsidiary (of China National Petroleum Corp) | China | 386,912 | 481,417 | |
| China Petroleum & Chemical Corp | Public | Subsidiary (of China Petrochemical Corp) | China | 368,009 | 454,171 | |
| China Petrochemical Corp | Government | Parent | China | XYZ | 432,484 | |
| Shell plc | Public | Parent | United Kingdom | 103,000 | 316,620 | |
| TotalEnergies SE | Public | Parent | France | 102,579 | 218,945 | |
| Chevron Corp | Public | Parent | United States of America | 45,600 | 196,913 | |
| Marathon Petroleum Corp | Public | Parent | United States of America | 18,200 | 150,090 | |
| Valero Energy Corp | Public | Parent | United States of America | 9,886 | 144,766 | |
| Phillips 66 | Public | Parent | United States of America | 14,000 | 147,399 | |
| 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 | |
| Rosneft Oil Co | Public | Parent | Russia | 334,600 | 107,241 | |
| Petroleo Brasileiro SA | Public | Parent | Brazil | 46,730 | 102,546 | |
| Eni SpA | Public | Parent | Italy | 33,142 | 101,349 | |
| Raizen SA | Public | Parent | Brazil | 38,034 | 47,621 | |
| Lukoil Oil Co | Public | Parent | Russia | 102,424 | 92,790 | |
| PTT Public Co Ltd | Public | Parent | Thailand | 30,772 | 90,467 | |
| Siemens Energy AG | Public | Parent | Germany | 97,000 | 32,722 | |
| Orlen SA | Public | Parent | Poland | 64,494 | 88,753 | |
| Petroliam Nasional Bhd | Government | Parent | Malaysia | 49,771 | 85,344 | |
| Oil and Natural Gas Corp Ltd | Public | Parent | India | 25,993 | 87,273 | |
| PT Pertamina (Persero) | Government | Parent | Indonesia | 33,596 | 84,888 | |
| 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 | |
| Repsol SA | Public | Parent | Spain | 25,059 | 63,748 | |
| Hindustan Petroleum Corp Ltd | Public | Subsidiary (of Oil and Natural Gas Corp Ltd) | India | 8,504 | 59,449 | |
| Plains All American Pipeline LP | Public | Subsidiary (of Plains GP Holdings LP) | United States of America | 4,100 | 57,342 | |
| ConocoPhillips | Public | Parent | United States of America | 9,900 | 56,141 | |
| QatarEnergy | Government | Parent | Qatar | XYZ | 52,256 | |
| World Kinect Corp | Public | Parent | United States of America | 5,289 | 47,711 | |
| Plains GP Holdings LP | Public | Parent | United States of America | 4,200 | 48,712 | |
| Enterprise Products Partners LP | Public | Parent | United States of America | 7,447 | 49,715 | |
| Constellation Energy Corp | Public | Parent | United States of America | XYZ | XYZ | |
| Vattenfall AB | Private | Parent | Sweden | 19,638 | 23,697 | |
| Sempra | Public | Parent | United States of America | 16,835 | 16,720 | |
| EDF Energy Holdings Ltd | Private | Subsidiary (of Electricite de France SA) | United Kingdom | XYZ | 16,886 | |
| Cenovus Energy Inc | Public | Parent | Canada | 5,998 | 38,690 | |
| HollyFrontier Corp | Private | Subsidiary (of HF Sinclair Corp ) | United States of America | XYZ | 38,205 | |
| Suncor Energy Inc | Public | Parent | Canada | 14,906 | 36,383 | |
| Puma Energy Holding Pte Ltd | Private | Joint Venture | Singapore | 3,137 | 15,897 | |
| Ecopetrol SA | Public | Parent | Colombia | 9,150 | 33,155 | |
| Vibra Energia SA | Public | Parent | Brazil | 3,526 | 32,636 | |
| Korea Gas Corp | Public | South Korea | 3,505 | 34,131 | ||
| HF Sinclair Corp | Public | Parent | United States of America | XYZ | XYZ | |
| Schlumberger Ltd | Public | Parent | United States of America | 111,000 | 33,135 | |
| Statkraft AS | Private | Subsidiary (of Statkraft SF ) | Norway | 5,300 | 16,403 |
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