| 1 | Sable Permian Resources Land,LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2019 |
| 2 | Sable Permian Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2021 |
| 3 | Safemark Oil & Gas, LLC | McKinney, TX 75072 | Oil & Gas Operator | Jun 2025 |
| 4 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Jun 2025 |
| 5 | Saguaro Petroleum, LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2025 |
| 6 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | Jun 2025 |
| 7 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 8 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 9 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2025 |
| 10 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Mar 2025 |
| 11 | Sanco Operating Company | Bullard, TX 75757 | Oil & Gas Operator | Jun 2025 |
| 12 | Sanders Oil & Gas, LTD. | Granbury, TX 76048 | Oil & Gas Operator | Aug 2015 |
| 13 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 14 | Seaboard Oil Company | Midland, TX 79710 | Oil & Gas Operator | Mar 2008 |
| 15 | Seaboard Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 16 | Sem Operating Company LLC | Houston, TX 77042 | Oil & Gas Operator | Jun 2025 |
| 17 | Sha-Jam Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Jun 2025 |
| 18 | Shackelford,Frank Oil Properties | Midland, TX 79701 | Oil & Gas Operator | Aug 1997 |
| 19 | Shell Western E&P Inc. | Houston, TX 77001 | Oil & Gas Operator | May 2011 |
| 20 | Sheridan Production Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Mar 2025 |
| 21 | Shirley, B. J. | Lawn, TX 79530 | Oil & Gas Operator | Mar 2008 |
| 22 | Silver Oil & Gas Inc. | San Angelo, TX 76906 | Oil & Gas Operator | Jun 2025 |
| 23 | Simata Energy | Midland, TX 79708 | Oil & Gas Operator | Jun 2025 |
| 24 | Simata Energy, LLC | Midland, TX 79708 | Oil & Gas Operator | Jun 2025 |
| 25 | Sinclair Development, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 26 | Sisters Operating Company | Victoria, TX 77904 | Oil & Gas Operator | Nov 2010 |
| 27 | Slant Operating, LLC | Lafayette, LA 70503 | Oil & Gas Operator | Jun 2025 |
| 28 | Sledge, H. G., Inc. | Midland, TX 79701 | Oil & Gas Operator | Dec 2016 |
| 29 | SMC Oil & Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 30 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Jun 2025 |
| 31 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 32 | South West Texas Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Feb 2000 |
| 33 | Southland Royalty Company | Houston, TX 77210 | Oil & Gas Operator | Sep 2011 |
| 34 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 35 | Southwestern Energy Prod Co | Houston, TX 77032 | Oil & Gas Operator | Jun 2015 |
| 36 | Staley Operating Co. | Midland, TX 79702 | Oil & Gas Operator | Jan 2022 |
| 37 | Stallion Energy, Inc. | Houston, TX 77060 | Oil & Gas Operator | Oct 2017 |
| 38 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 39 | Stewart Producers, Inc. | Mount Vernon, IL 62864 | Oil & Gas Operator | Feb 2025 |
| 40 | Stowe Energy, Inc. | Vernon, TX 76384 | Oil & Gas Operator | Mar 2003 |
| 41 | Stringer Oil & Gas Co., Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Oct 1996 |
| 42 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 43 | Summit Petroleum LLC | Midland, TX 79705 | Oil & Gas Operator | Jun 2025 |
| 44 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | Jun 2025 |
| 45 | Synergex Inc | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2025 |