| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | A. L. & V. I. Grayson | Oil Operator | Dec 1993 | |
| 2 | A. S. Johnston Drilling Corp. | Oil & Gas Operator | Dec 1987 | |
| 3 | Aalpha Energy Inc. | Oil & Gas Operator | Oct 2024 | |
| 4 | Adco LTD. | Oil & Gas Operator | Dec 1983 | |
| 5 | Aera Energy LLC | Oil & Gas Operator | Sep 2024 | |
| 6 | Allenco Energy Inc. | Oil & Gas Operator | Aug 2024 | |
| 7 | Amrich Energy Inc. | Oil & Gas Operator | Dec 2022 | |
| 8 | Anterra Services Inc. | Oil & Gas Operator | Aug 2024 | |
| 9 | Arco Oil & Gas Company | Plano, TX 75086 | Oil & Gas Operator | Mar 2006 |
| 10 | Arco Western Energy Co. | Oil & Gas Operator | Dec 1999 | |
| 11 | Argosy Oil Company | Gas Operator | Dec 1999 | |
| 12 | Arrowhead Operating Inc. | Argyle, TX 76226 | Oil & Gas Operator | Nov 2024 |
| 13 | Asioco Inc. | Oil & Gas Operator | Jan 2018 | |
| 14 | Atlantic Oil Company | Oil & Gas Operator | Aug 2024 | |
| 15 | Atlantic Richfield Company | Plano, TX 75074 | Oil & Gas Operator | Dec 2016 |
| 16 | Austin Oil Company | Oil & Gas Operator | Dec 2000 | |
| 17 | Axis Petroleum Co. | Oil & Gas Operator | Dec 2022 |