Oil & Gas Companies in Sheridan County, MT
| Company Name | Company Location | Company Type | Most Recent Production |
| 1 | Bain Resources, Inc. | Arlington, TX 76012 | Oil & Gas Operator | Jul 2025 |
| 2 | Basic Earth Science Systems, Inc. | Austin, TX 78714 | Oil & Gas Operator | Apr 2010 |
| 3 | Bensun Energy, LLC | Grandview, TX 76050 | Oil Operator | Aug 2020 |
| 4 | Berco Resources, Inc. | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 5 | Berenergy Corporation | Denver, CO 80217 | Oil & Gas Operator | Aug 2025 |
| 6 | Berexco LLC | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 7 | Bill Barrett Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2017 |
| 8 | Bluebonnet Energy Corporation | Englewood, CO 80112 | Oil & Gas Operator | Sep 2015 |
| 9 | Bowline Energy LLC | Denver, CO 80201 | Oil & Gas Operator | Dec 2022 |
| 10 | Brooks Exploration, Inc. | Denver, CO 80293 | Oil & Gas Operator | Mar 2001 |
| 11 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | Oct 2025 |
Production numbers shown above are only for Sheridan County, MT and for the production period listed.