| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Alpha Energy LLC | Ashland, OR 97520 | Oil & Gas Operator | Jul 2025 |
| 2 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 3 | Anderson Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2015 |
| 4 | Anr Production Company | Houston, TX 77046 | Oil & Gas Operator | Aug 2017 |
| 5 | Anschutz Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2016 |
| 6 | Apache Corporation | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 7 | Apollo 17 Oil And Gas Inc | Oil Operator | Feb 1988 | |
| 8 | Arapaho Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Nov 1998 |
| 9 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |