| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | A & G Oil & Gas | Shelby, MT 59474 | Oil & Gas Operator | Jul 2011 |
| 2 | A. B. Energy LLC | Chester, MT 59522 | Oil & Gas Operator | Dec 2025 |
| 3 | Alme, Henry A. | Cut Bank, MT 59427 | Gas Operator | Nov 2025 |
| 4 | American Midwest Oil & Gas Corp. | Billings, MT 59101 | Gas Operator | Jun 2021 |
| 5 | Ayers, Milan R. | Gas Operator | Oct 2000 |