| 1 | S & M Drilling, LLC | Wichita Falls, TX 76308 | Oil Operator | Sep 2023 |
| 2 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 3 | Sabinal Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2025 |
| 4 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 5 | Sable Permian Resources Land,LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2019 |
| 6 | Sable Permian Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2021 |
| 7 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 8 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | Dec 2025 |
| 9 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 10 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 11 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 12 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 13 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2025 |
| 14 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Oct 2025 |
| 15 | Sandia Production Co., Inc. | Corrales, NM 87048 | Oil & Gas Operator | Dec 2025 |
| 16 | Sandor Petroleum Corporation | Crane, TX 79731 | Oil & Gas Operator | Dec 2025 |
| 17 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | Dec 2025 |
| 18 | Santa Fe Energy Resources, Inc. | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 19 | Santa Fe Snyder Corporation | Houston, TX 77024 | Oil & Gas Operator | Oct 2000 |
| 20 | Sarita Energy Resources, LTD. | Houston, TX 77277 | Oil & Gas Operator | Dec 2025 |
| 21 | Schlachter Operating Corporation | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 22 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | Dec 2025 |
| 23 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 24 | Seaboard Oil Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2008 |
| 25 | Seaboard Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 26 | Seco Production Company | Midland, TX 79708 | Oil & Gas Operator | Aug 2003 |
| 27 | Seguro Oil And Gas, LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2024 |
| 28 | Select Water Solutions, LLC | Gainesville, TX 76240 | Oil Operator | Aug 2025 |
| 29 | Sem Operating Company LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 30 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 31 | Shirley, B. J. | Lawn, TX 79530 | Oil & Gas Operator | Mar 2008 |
| 32 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Dec 2025 |
| 33 | Silver Cross Energy Partners LLC | Richmond, TX 77469 | Oil & Gas Operator | Dec 2025 |
| 34 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Dec 2025 |
| 35 | Sledge, H. G., Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2016 |
| 36 | SM Energy Company | Midland, TX 79707 | Oil & Gas Operator | Dec 2025 |
| 37 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 38 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Dec 2025 |
| 39 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 40 | Sol Oil Co., L.C. | Crane, TX 79731 | Oil Operator | Dec 2025 |
| 41 | Southern Mineral Corporation | Houston, TX 77002 | Oil & Gas Operator | Oct 2001 |
| 42 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 43 | Southwest Royalties, Inc. | Midland, TX 79710 | Oil & Gas Operator | Dec 2025 |
| 44 | Spade Energy L.L.C. | Wichita Falls, TX 76310 | Oil & Gas Operator | Dec 2025 |
| 45 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 46 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 47 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 48 | Stanolind Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Apr 2008 |
| 49 | STB Energy Inc. | Tulsa, OK 74105 | Oil & Gas Operator | Jul 2008 |
| 50 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 51 | Stout Energy Inc. | Midland, TX 79708 | Oil & Gas Operator | Dec 2025 |
| 52 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Dec 2025 |
| 53 | Summit Petroleum LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 54 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Dec 2025 |
| 55 | Swanson, Tom | Electra, TX 76360 | Oil & Gas Operator | Oct 2004 |
| 56 | Swanson, Tommy Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Mar 2017 |
| 57 | Swartz Oil Company | San Angelo, TX 76906 | Oil & Gas Operator | Dec 2025 |