| 1 | Saga Petroleum LLC Of Colorado | Norman, OK 73072 | Oil & Gas Operator | Oct 2025 |
| 2 | Samson Resources Company LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2021 |
| 3 | Seedy Draw LLC | Greenwood VIllage, CO 80111 | Oil Operator | Jul 2025 |
| 4 | Seer Operating LLC | Sheridan, WY 82801 | Oil & Gas Operator | Oct 2016 |
| 5 | Simasko Production Co | Denver, CO 80204 | Oil & Gas Operator | Nov 1997 |
| 6 | Skinner Oil & Gas LLC | Gillette, WY 82717 | Oil & Gas Operator | Jan 2024 |
| 7 | Skinner'S Resources & Expl Inc | | Oil & Gas Operator | Jun 2007 |
| 8 | Sklar Exploration Company LLC | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 9 | Skull Creek A LLC | Douglas, WY 82633 | Oil & Gas Operator | Jul 2025 |
| 10 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 11 | Smith Al | Duncan, OK 73534-0037 | Oil Operator | Dec 1998 |
| 12 | Sonat Exploration Co. | Houston, TX 77251 | Oil & Gas Operator | Dec 2021 |
| 13 | Sonterra Energy LLC | Wichita, KS 67226 | Oil & Gas Operator | Jul 2022 |
| 14 | Sooner Operating Co Inc | Casper, WY 83602 | Oil Operator | Aug 2025 |
| 15 | Southern States Petroleum Corp | | Oil Operator | Jan 1984 |
| 16 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 17 | Stone & Wolf LLC | Sheridan, WY 82801 | Oil & Gas Operator | Dec 2006 |
| 18 | Stone Energy LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 19 | Sunshine Valley Petroleum | Casper, WY 82605 | Oil & Gas Operator | Aug 2025 |
| 20 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 21 | Synergy Offshore LLC | Houston, TX 77024 | Oil & Gas Operator | Feb 2022 |