| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Ainsworth Operat | Oil Operator | Apr 1995 | |
| 2 | Ainsworth Operating Co. | Salem, OR 97302 | Oil Operator | Jun 2025 |
| 3 | Alexander Production Service | Oil & Gas Operator | Dec 2009 | |
| 4 | Arbuckle Energy Inc. | Wichita, KS 67202 | Oil & Gas Operator | Jun 2025 |
| 5 | Arnold Prodn. | Oil & Gas Operator | Jan 2006 | |
| 6 | Atlantis Oil Cor | Oil Operator | Sep 1989 |