| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Adair E H Oil Co | Oil & Gas Operator | Aug 1994 | |
| 2 | Allen Drilling C | Oil & Gas Operator | Nov 1994 | |
| 3 | Ambrotra Energy LLC | Medicine Lodge, KS 67104 | Oil Operator | May 2025 |
| 4 | American Energie | Oil & Gas Operator | May 1995 | |
| 5 | American Explora | Gas Operator | Apr 1994 | |
| 6 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 7 | American Warrior Inc | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 8 | Americase Production Co. | Dallas, TX 75252 | Oil Operator | May 2002 |
| 9 | Antares Oil Corp | Denver, CO 80202 | Oil & Gas Operator | Oct 2015 |
| 10 | Apache Drilling | Oil Operator | Sep 1994 | |
| 11 | Arco Oil & Gas C | Oil & Gas Operator | Dec 1992 |