| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Gallup City Oil, Inc. | Conrad, MT 59425 | Oil & Gas Operator | Mar 2011 |
| 2 | Gallup City Oil, LLC | Conrad, MT 59425 | Oil Operator | Jun 2025 |
| 3 | Garman Stripper Wells, LLC | Choteau, MT 59422 | Oil Operator | Jul 2025 |
| 4 | Great Northern Drilling Company | Billings, MT 59103 | Oil & Gas Operator | Jun 2016 |