| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Sagebrush Resources, LLC | Oil & Gas Operator | Jan 2011 | |
| 2 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 3 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 4 | Sedalia Energy, LLC | Oil & Gas Operator | Mar 2018 | |
| 5 | Shell Oil Company | Houston, TX 77210 | Oil & Gas Operator | Apr 2015 |
| 6 | Sohio Petroleum Co. | Casper, WY 82602 | Oil & Gas Operator | Apr 1986 |
| 7 | South Oak Production Company | Oil & Gas Operator | Jun 2010 | |
| 8 | Sparrow Oil & Gas LLC | Oil & Gas Operator | Aug 2025 | |
| 9 | St Oil Company | Denver, CO 80264-2101 | Oil & Gas Operator | Dec 2010 |
| 10 | Stephens Williston, LLC Dba Seg Williston, LLC | Oil & Gas Operator | Aug 2025 |