Oil & Gas Companies in Fremont County, WY
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Oct 2025 |
| 2 | Ambrit Energy Corporation | Garland, TX 75044 | Oil & Gas Operator | Jun 2003 |
| 3 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 4 | Amplify Energy Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 5 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 6 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 7 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 8 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 9 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 10 | Augustus Energy Partners LLC | Billings, MT 59102 | Oil & Gas Operator | Feb 2014 |
Production numbers shown above are only for Fremont County, WY and for the production period listed.