| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Aa Production Services Inc. | Gas Operator | Dec 2025 | |
| 2 | Aba Energy Corporation | Oil & Gas Operator | Mar 2026 | |
| 3 | Argosy Oil Company | Gas Operator | Dec 1999 | |
| 4 | Arkoma Production Company Of California | Oil & Gas Operator | Dec 1993 | |
| 5 | Armstrong Petroleum Corporation | Oil & Gas Operator | Dec 2025 | |
| 6 | Aspen Exploration Corporation | Oil & Gas Operator | Dec 2007 | |
| 7 | Atlantic Oil Company | Oil & Gas Operator | Dec 2025 |