| 1 | S & M Royalty | Andrews, TX 79714 | Oil & Gas Operator | Jan 1997 |
| 2 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 3 | Sabinal Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2025 |
| 4 | Sackerol Enterprises, Inc. | Plattsburgh, NY 12901 | Oil & Gas Operator | Feb 2026 |
| 5 | Saga Pet. LTD Liability Co Of Co | Midland, TX 79701 | Oil & Gas Operator | Apr 2004 |
| 6 | Saguaro Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 7 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 8 | Samis Oil Company, Inc. | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2000 |
| 9 | Sammax Operating LLC | Snyder, TX 79549 | Oil Operator | Feb 2026 |
| 10 | Sandridge Energy, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | May 2018 |
| 11 | Santa Fe Energy Oper. Part., LP | Houston, TX 77057 | Oil & Gas Operator | Dec 1994 |
| 12 | Satanta Oil Company | Midland, TX 79704 | Oil & Gas Operator | Feb 2026 |
| 13 | Savannah Ross And Company, LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 14 | Schlachter Operating Corporation | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 15 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 16 | Schlachter, David A., Estate Of | Dallas, TX 75225 | Oil & Gas Operator | Jan 2000 |
| 17 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Feb 2026 |
| 18 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 19 | SD Royale Energy, Inc. | San Diego, CA 92159 | Oil & Gas Operator | Feb 2026 |
| 20 | SDX Resources, Inc. | Midland, TX 79704 | Oil & Gas Operator | Feb 2026 |
| 21 | Sharp Image Energy, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Feb 2026 |
| 22 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 23 | Shenandoah Petroleum Corporation | Midland, TX 79705 | Oil & Gas Operator | Feb 2026 |
| 24 | Simata Energy | Midland, TX 79708 | Oil & Gas Operator | Feb 2026 |
| 25 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Feb 2026 |
| 26 | Skeeter Oil L.L.C. | Big Spring, TX 79720 | Oil Operator | Feb 2026 |
| 27 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Feb 2026 |
| 28 | Smith Brothers Oil & Gas, Inc. | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 29 | Smith Oil Co. | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 30 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 31 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 32 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 33 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 34 | Spalding Energy, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Feb 2026 |
| 35 | Spindletop Oil & Gas Co. | Dallas, TX 75230 | Oil & Gas Operator | Feb 2026 |
| 36 | Staley Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Jan 2000 |
| 37 | Sterlynn Oil & Gas, Inc. | Harper, TX 78631 | Oil Operator | Feb 2026 |
| 38 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 39 | Sweet Crude Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Feb 2026 |
| 40 | Sweetwater Drilling Co., Inc. | Fort Worth, TX 76116 | Oil & Gas Operator | Feb 2026 |
| 41 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 42 | SWJN Oil Company | Kilgore, TX 75663 | Oil Operator | Feb 2026 |