Oil & Gas Companies in Mountrail County, ND
| Company Name | Company Location | Company Type | Most Recent Production |
|---|
| 1 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jul 2025 |
| 2 | Samuel Gary Jr. & Associates, Inc. | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 3 | Sequel Energy, LLC | | Oil & Gas Operator | May 2014 |
| 4 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Nov 2025 |
| 5 | Sinclair Oil & Gas Company | Salt Lake Cty, UT 84130 | Oil & Gas Operator | Nov 2025 |
| 6 | Skelly Oil Co | | Oil & Gas Operator | Mar 2005 |
| 7 | Slawson Exploration Company Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Nov 2025 |
| 8 | Sogc, Inc. | Salt Lake Cty, UT 84131 | Oil & Gas Operator | Aug 2025 |
| 9 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 10 | Statoil Oil & Gas LP | Austin, TX 78730 | Oil & Gas Operator | Oct 2018 |
| 11 | Stephens Williston, LLC Dba Seg Williston, LLC | | Oil & Gas Operator | Sep 2025 |
Production numbers shown above are only for Mountrail County, ND and for the production period listed.