| Company Name | Entity type | Parent/Subsidiary/Independent | Headquarters | No. of Employees | Annual Revenue ($M) | |
|---|---|---|---|---|---|---|
| Devon Energy Corp | Public | Parent | United States of America | 1,900 | 15,258 | |
| Liberty Energy Inc | Public | Parent | United States of America | 5,500 | 4,748 | |
| Anadarko US Offshore LLC | Private | Subsidiary (of Occidental Petroleum Corp ) | United States of America | XYZ | XYZ | |
| Western Midstream Partners LP | Public | Subsidiary (of Occidental Petroleum Corp) | United States of America | 1,377 | 3,106 | |
| Mammoth Energy Services Inc | Public | Parent | United States of America | 1,037 | 362 | |
| Gulfport Energy Corp | Public | Parent | United States of America | 223 | 1,331 | |
| SandRidge Energy Inc | Public | Parent | United States of America | 102 | 149 | |
| Anadarko Gathering Co | Private | Subsidiary (of Western Midstream Operating LP ) | United States of America | XYZ | XYZ | |
| Anadarko Petroleum Corp | Private | Subsidiary (of Occidental Petroleum Corp) | United States of America | XYZ | XYZ | |
| Anadarko Colombia Co | Private | Subsidiary (of Occidental Petroleum Corp ) | Colombia | XYZ | XYZ | |
| Groupement Berkine Sonatrach Anadarko | Private | Joint Venture | Algeria | XYZ | XYZ | |
| Anadarko Exploracao e Producao Ltda | Private | Subsidiary (of Anadarko Petroleum Corp ) | Brazil | XYZ | XYZ | |
| Kaiser-Francis Anadarko Limited Partnership | Private | Subsidiary (of Anadarko Petroleum Corp ) | United States of America | XYZ | XYZ | |
| Anadarko Qatar Energy Co LLC | Private | Subsidiary (of Occidental Petroleum Corp ) | Qatar | XYZ | XYZ | |
| First State Bank of Anadarko, Oklahoma | Private | Independent | United States of America | XYZ | XYZ | |
| EOG Resources Inc | Public | Parent | United States of America | 3,050 | 24,091 | |
| Targa Resources Corp | Public | Parent | United States of America | 2,850 | 20,930 | |
| Ovintiv Inc | Public | Parent | United States of America | 1,743 | 10,883 | |
| OGE Energy Corp | Public | United States of America | 2,237 | 3,376 | ||
| Alliance Resource Partners LP | Public | Parent | United States of America | 3,595 | 2,567 | |
| Jones Energy Inc | Private | Parent | United States of America | XYZ | XYZ | |
| Great Plains Operating LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Lagoon Water Solutions Holdings LLC | Private | Parent | United States of America | XYZ | XYZ | |
| Crow Creek Holding Corp | Private | Independent | United States of America | XYZ | XYZ | |
| Western Farmers Electric Cooperative | Institution | Parent | United States of America | XYZ | XYZ | |
| Ovation Energy II LP | Private | Independent | United States of America | XYZ | XYZ | |
| Ward Petroleum Corp | Private | Independent | United States of America | XYZ | XYZ | |
| Dorado Gas Resources LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Bricktown Energy LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Kerr-McGee China Petroleum Ltd | Private | Subsidiary (of Brightoil Petroleum (Holdings) Ltd ) | China | XYZ | XYZ | |
| Output Exploration LLC | Private | Parent | United States of America | XYZ | XYZ | |
| Lariat Petroleum Inc | Private | Independent | United States of America | XYZ | XYZ | |
| Lee-Var, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| Crusader Energy Group Inc | Private | Independent | United States of America | XYZ | XYZ | |
| Highland Oil and Gas LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Unit Petroleum Co | Private | Subsidiary (of Unit Corp ) | United States of America | XYZ | XYZ | |
| Alta Mesa Resources Inc | Private | Parent | United States of America | XYZ | XYZ | |
| Greenstar Energy, L.L.C | Private | Independent | United States of America | XYZ | XYZ | |
| Chesapeake Granite Wash Trust | Public | Subsidiary (of Diversified Energy Company PLC ) | United States of America | XYZ | XYZ | |
| Grizzly Energy LLC | Private | Parent | United States of America | 290 | 460 | |
| Unit Corp | Public | Parent | United States of America | XYZ | XYZ | |
| Primary Natural Resources, Inc. | Private | Independent | United States of America | XYZ | XYZ | |
| Sendero Energy Inc | Private | Independent | United States of America | XYZ | XYZ | |
| WhitMar Exploration Co | Private | Independent | United States of America | XYZ | XYZ | |
| Black Butte Coal Company | Private | Independent | United States of America | XYZ | XYZ | |
| Brighton Energy LLC | Private | Independent | United States of America | XYZ | XYZ | |
| Wold Oil Properties Inc | Private | Subsidiary (of Wold Companies ) | United States of America | XYZ | XYZ | |
| Unit Drilling Co | Private | Subsidiary (of Unit Corp ) | United States of America | XYZ | XYZ | |
| Mewbourne Oil Co Inc | Private | Subsidiary (of Mewbourne Holdings, Inc ) | United States of America | XYZ | XYZ | |
| Horizon Resources LLC | Private | Independent | United States of America | XYZ | XYZ |
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