| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | A. Michael Hyde Oil & Gas Co. | Oil & Gas Operator | Jan 1989 | |
| 2 | Aethon Energy Operating LLC | Dallas, TX 75251 | Oil & Gas Operator | Nov 2024 |
| 3 | Amax Oil & Gas Inc | Fort Worth, TX 76107 | Oil & Gas Operator | Nov 2014 |
| 4 | American Exploration Company | Houston, TX 77010 | Oil & Gas Operator | Jan 2000 |
| 5 | Amoco Production Co. | Houston, TX 77253 | Oil & Gas Operator | Jun 2015 |
| 6 | Anadarko E&P Onshore LLC | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 7 | Anderson Oil Company | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 2015 |
| 8 | Arco O & G Co-Div Atl Rich Co | Oil & Gas Operator | Feb 1994 | |
| 9 | Arkla Energy Resources | Shreveport, LA 71151 | Oil & Gas Operator | Mar 2015 |
| 10 | Arkla Exploration Co. | Shreveport, LA 71151 | Oil & Gas Operator | Jan 1993 |
| 11 | Associated Natural Gas, Inc. | Oil Operator | Apr 1996 |