| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Amerada Hess Corp. Unit Operator | Oil & Gas Operator | Dec 1986 | |
| 2 | Amerada Hess Corporation | Houston, TX 77252 | Oil & Gas Operator | Aug 2013 |
| 3 | Archer Operations California LLC | Gas Operator | Dec 2024 | |
| 4 | Argo Petroleum Corporation | Oil & Gas Operator | Dec 1989 | |
| 5 | Arkoma Production Company Of California | Oil & Gas Operator | Dec 1993 | |
| 6 | Aspen Exploration Corporation | Oil & Gas Operator | Dec 2007 | |
| 7 | Atlantic Oil Company | Oil & Gas Operator | Dec 2024 |