| 1 | Sabinal Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 2 | Saddle Rim Energy (Texas), LLC | Greenwood VLG, CO 80111 | Oil Operator | Oct 2025 |
| 3 | Salt Creek Oil Corporation | Irving, TX 75016 | Oil & Gas Operator | Dec 1993 |
| 4 | Salt Creek Production, Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Oct 2025 |
| 5 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 6 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 7 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 8 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 9 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 10 | Sandridge Tertiary, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2012 |
| 11 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 12 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 13 | Seaboard Oil Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2008 |
| 14 | Seaboard Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 15 | Seely Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2025 |
| 16 | Seneca Resources Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2017 |
| 17 | Shell Land & Energy Co. | Houston, TX 77001 | Oil & Gas Operator | Feb 1997 |
| 18 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 19 | Shenandoah Petroleum Corporation | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 20 | Sierra Lima Oil & Gas, LLC | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 21 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Oct 2025 |
| 22 | Silver Spike Energy Oper, LLC | Midland, TX 79710 | Oil & Gas Operator | Dec 2015 |
| 23 | Simmons, L.B. Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Nov 2000 |
| 24 | Sink Hole, Inc. | Levelland, TX 79336 | Oil & Gas Operator | Dec 2000 |
| 25 | Sixess Energy, LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 26 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Oct 2025 |
| 27 | Slape Oil Company, Inc. | Houston, TX 77064 | Oil & Gas Operator | Jun 2011 |
| 28 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 29 | Socorro Exploration, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | Oct 2025 |
| 30 | Sogo III LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2017 |
| 31 | Southern Union Exploration Co. | Austin, TX 78701 | Oil & Gas Operator | Feb 2002 |
| 32 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 33 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 34 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 35 | Springfield Oil Services, Inc. | Mamaroneck, NY 10543 | Oil & Gas Operator | Oct 2025 |
| 36 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Oct 2025 |
| 37 | Stanolind Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2021 |
| 38 | Stanolind Permian LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 39 | Stanolind Production LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 40 | Stoltz, Deane H. | Midland, TX 79710 | Oil & Gas Operator | Oct 2000 |
| 41 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Oct 2025 |
| 42 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |