| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Abercrombie A L | Oil & Gas Operator | Nov 1995 | |
| 2 | Abercrombie Energy, LLC | Wichita, KS 67212 | Oil & Gas Operator | Jun 2025 |
| 3 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 4 | Amoco Production | Oil & Gas Operator | Jun 2012 | |
| 5 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Oct 2025 |
| 6 | Anadarko Petrole | Oil & Gas Operator | Dec 1996 | |
| 7 | Anadarko Petroleum | Oil & Gas Operator | Oct 2007 | |
| 8 | Anadarko Petroleum Co | Houston, TX 77227 | Oil & Gas Operator | Feb 1998 |
| 9 | Anadarko Petroleum Corporation | Houston, TX 77251 | Oil & Gas Operator | Jul 2025 |
| 10 | Anadarko Prod | Oil & Gas Operator | Dec 1996 | |
| 11 | Apx Corporation | Houston, TX 77251 | Oil & Gas Operator | Dec 2009 |
| 12 | Arco Oil & Gas C | Oil & Gas Operator | Dec 1992 | |
| 13 | Aries Operating LP | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |