| Company Name | Entity type | Parent/Subsidiary/Independent | Headquarters | No. of Employees | Annual Revenue ($M) | |
|---|---|---|---|---|---|---|
| 3R Petroleum Oleo E Gas SA | Public | Parent | Brazil | XYZ | XYZ | |
| China National Petroleum Corp | Government | Parent | China | 1,448,400 | 435,244 | |
| China Petroleum & Chemical Corp | Public | Subsidiary (of China Petrochemical Corp) | China | 385,691 | 424,950 | |
| Marathon Petroleum Corp | Public | Parent | United States of America | 17,700 | 120,922 | |
| Bharat Petroleum Corp Ltd | Public | Parent | India | 8,594 | 58,588 | |
| Hindustan Petroleum Corp Ltd | Public | Subsidiary (of Oil and Natural Gas Corp Ltd) | India | 9,065 | 50,673 | |
| Occidental Petroleum Corp | Public | Joint Venture | United States of America | 11,678 | 26,122 | |
| Korea Gas Corp | Public | Parent | South Korea | 3,505 | 24,054 | |
| Verbundnetz Gas AG | Private | Subsidiary (of EnBW Energie Baden-Wurttemberg AG) | Germany | 1,462 | 21,852 | |
| Oil and Natural Gas Corp Ltd | Public | Parent | India | 27,165 | 72,023 | |
| ADNOC Gas Processing | Public | Joint Venture | United Arab Emirates | XYZ | XYZ | |
| PG&E Corp | Public | Parent | United States of America | 26,000 | 20,642 | |
| Tokyo Gas Co Ltd | Public | Parent | Japan | 16,697 | 19,098 | |
| Vietnam National Petroleum Group | Public | Parent | Vietnam | 25,577 | 13,276 | |
| MOL Hungarian Oil and Gas Plc | Public | Parent | Hungary | 24,084 | 32,567 | |
| China Petroleum Engineering Corp | Public | Parent | China | XYZ | XYZ | |
| Osaka Gas Co Ltd | Public | Parent | Japan | 20,961 | 14,127 | |
| Pacific Gas and Electric Co | Public | Subsidiary (of PG&E Corp) | United States of America | 16,000 | 20,642 | |
| BP Plc | Public | Parent | United Kingdom | 65,900 | 241,392 | |
| ENN Natural Gas Co Ltd | Public | Parent | China | XYZ | XYZ | |
| Shaanxi Yanchang Petroleum Chemical Engineering Co Ltd | Public | Parent | China | XYZ | XYZ | |
| China Gas Holdings Ltd | Public | Parent | Hong Kong | 59,462 | 11,351 | |
| H-E-B Grocery Co LP | Private | Parent | United States of America | XYZ | XYZ | |
| Chennai Petroleum Corp Ltd | Public | Subsidiary (of Indian Oil Corp Ltd) | India | 1,486 | 8,191 | |
| Independent Petroleum Group | Public | Parent | Kuwait | 149 | 5,386 | |
| Oleo e Gas Participacoes SA | Private | Subsidiary (of Dommo Energia SA ) | Brazil | XYZ | XYZ | |
| Heftos Oleo e Gas Engenharia | Private | Subsidiary (of Azevedo & Travassos SA ) | Brazil | XYZ | XYZ | |
| Galp Energia SGPS SA | Public | Parent | Portugal | 6,152 | 32,117 | |
| China Resources Gas Group Ltd | Public | Subsidiary (of China Resources (Holdings) Co Ltd) | Hong Kong | 52,780 | 10,058 | |
| Southern California Gas Co | Public | Subsidiary (of Sempra Energy) | United States of America | 8,178 | 6,840 | |
| Star Petroleum Refining PCL | Public | Subsidiary (of Chevron Corp) | Thailand | 500 | 5,400 | |
| PTT Public Co Ltd | Public | Parent | Thailand | 29,765 | 105,418 | |
| RS Oleo & Gas | Private | Independent | Brazil | XYZ | XYZ | |
| Southern Company Gas | Private | Subsidiary (of Southern Co) | United States of America | 285 | 4,380 | |
| Queiroz Galvao Oleo e Gas SA | Private | Subsidiary (of QGOG Constellation SA ) | Brazil | XYZ | XYZ | |
| PetroVietnam Gas Corp | Public | Subsidiary (of Vietnam National Oil and Gas Group ) | Vietnam | XYZ | XYZ | |
| SK Gas Co Ltd | Public | Subsidiary (of SK Chemicals Co Ltd ) | South Korea | XYZ | XYZ | |
| 3R Petroleum Offshore SA | Private | Independent | Brazil | XYZ | XYZ | |
| SPE 3R Petroleum SA | Private | Subsidiary (of 3R Petroleum Oleo E Gas SA ) | Brazil | XYZ | XYZ | |
| Southwest Gas Holdings Inc | Public | Parent | United States of America | XYZ | XYZ | |
| Ceylon Petroleum Corp | Government | Parent | Sri Lanka | XYZ | XYZ | |
| Mitsubishi Gas Chemical Co Inc | Public | Parent | Japan | 9,888 | 6,282 | |
| Toho Gas Co Ltd | Public | Parent | Japan | 6,180 | 4,588 | |
| IESA Oleo & Gas SA | Private | Subsidiary (of IE SA Projetos Equipamentos e Montagens SA ) | Brazil | XYZ | XYZ | |
| CPC Corp | Government | Parent | Taiwan | 16,293 | 30,697 | |
| Pilipinas Shell Petroleum Corp | Public | Subsidiary (of Shell plc ) | Philippines | XYZ | XYZ | |
| Naturgy Energy Group SA | Public | Parent | Spain | 7,115 | 40,162 | |
| Phoenix Oleo & Gas Natural Ltda | Private | Independent | Brazil | XYZ | XYZ | |
| E-Commodities Holdings Limited | Public | Subsidiary (of Famous Speech Limited ) | China | 1,520 | 5,299 | |
| SK E&S Co Ltd | Private | Subsidiary (of SK Holdings Co., Ltd ) | South Korea | XYZ | XYZ |
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