| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Samson Resources Company LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2021 |
| 2 | Seven Sisters Oil & Gas LLC | Casper, WY 82602 | Oil & Gas Operator | Jan 2022 |
| 3 | Simon Oil LLC | Kaycee, WY 82639 | Oil Operator | Jan 2024 |
| 4 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 5 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 6 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 7 | Southwestern Production Corporation | Lakewood, CO 80228 | Oil & Gas Operator | Mar 2024 |
| 8 | Storm Cat Energy (USA) Operating Corporation | Denver, CO 80202 | Gas Operator | Jun 2017 |
| 9 | Stripper Oil Company Inc | Oil Operator | Dec 2023 | |
| 10 | Swepi LP | Houston, TX 77079 | Oil & Gas Operator | Jul 2020 |