| 1 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 2 | Sabine Oil & Gas LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 3 | Sabio Oil & Gas Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jan 1998 |
| 4 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 5 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 6 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 7 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2026 |
| 8 | Santerra Oil & Gas, Inc. | Seagoville, TX 75159 | Oil & Gas Operator | Sep 2026 |
| 9 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 10 | Scope Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2003 |
| 11 | Scott Oil Company | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2011 |
| 12 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 13 | Seismic Leasing Service | Denver, CO 80216 | Oil & Gas Operator | Aug 2000 |
| 14 | SHWJ Oil & Gas Co., Inc. | Oil City, LA 71061 | Oil Operator | Sep 2026 |
| 15 | Silver Tusk Operating Co. LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2018 |
| 16 | Siroco Operating Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2010 |
| 17 | Skewes Operating Company | Bluefield, VA 24605 | Oil & Gas Operator | Sep 2026 |
| 18 | Smith Oil Co. | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 19 | SND Operating, L.L.C. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 20 | Southwest Operating, Inc.-Tyler | Tyler, TX 75701 | Oil & Gas Operator | Sep 2026 |
| 21 | Square One Energy, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Oct 2015 |
| 22 | Stacha, Eddy A. | Rice, TX 75155 | Oil & Gas Operator | Sep 2026 |
| 23 | Stacy Reamy | Purdon, TX 76679 | Oil Operator | Sep 2026 |
| 24 | Stoner Oil | Corsicana, TX 75109 | Oil Operator | Sep 2026 |
| 25 | Stoner, C. M. | Cleburne, TX 76031 | Oil & Gas Operator | Oct 1996 |
| 26 | Stroube Energy Corporation | Dallas, TX 75248 | Oil & Gas Operator | Jan 2012 |
| 27 | Stroube Family Partnership #2 | Corsicana, TX 75151 | Oil Operator | Sep 2026 |
| 28 | Stroud Petroleum, Inc. | Shreveport, LA 71162 | Oil & Gas Operator | Sep 2026 |
| 29 | Sulphur River Exploration, Inc. | Dallas, TX 75244 | Oil & Gas Operator | Sep 2026 |
| 30 | Summitt Resources | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2008 |
| 31 | Sunland Production Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | May 2026 |