| 1 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 2 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 3 | Shelby Boswell Operator, LLC | Dallas, TX 75225 | Oil & Gas Operator | Dec 2024 |
| 4 | Sheridan Production Co III, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2024 |
| 5 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2024 |
| 6 | Shuler Drilling Co., Inc. | El Dorado, AR 71730 | Oil & Gas Operator | Jul 2024 |
| 7 | Silver Hill Energy Operating, LLC | Dallas, TX 75201 | Oil & Gas Operator | Dec 2024 |
| 8 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Dec 2024 |
| 9 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
| 10 | Sonat Exploration Company -Tyler | Houston, TX 77251 | Oil & Gas Operator | Dec 1999 |
| 11 | Sonerra Resources Corporation | Nacogdoches, TX 75963 | Oil & Gas Operator | Dec 2024 |
| 12 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 13 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Dec 2024 |
| 14 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 15 | SW Operating, Inc. | Kilgore, TX 75662 | Oil & Gas Operator | Sep 2000 |
| 16 | SWN Production Company, LLC | Spring, TX 77391 | Oil & Gas Operator | Sep 2024 |