| 1 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | Oct 2025 |
| 2 | Samson Exploration LLC | Tulsa, OK 74101 | Oil & Gas Operator | Aug 2025 |
| 3 | Sanchez Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 4 | Sandalwood Exploration, L.P. | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 5 | Sandel Energy, Inc. | Huntsville, TX 77342 | Oil & Gas Operator | Apr 2004 |
| 6 | Sandel Operating Company | Huntsville, TX 77340 | Oil & Gas Operator | Oct 2025 |
| 7 | Santa Rosa Operating, LLC | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Oct 2025 |
| 8 | SBJ Energy Partners, L.L.C. | Waco, TX 76710 | Oil & Gas Operator | Oct 2025 |
| 9 | Seago Petroleum, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Oct 2025 |
| 10 | Seagull Energy E & P Inc | Houston, TX 77002 | Oil & Gas Operator | Jan 2015 |
| 11 | Seguro Well Service, Inc. | Gonzales, TX 78629 | Oil & Gas Operator | Oct 2025 |
| 12 | Sellers Lease Service, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Oct 2025 |
| 13 | Sellers' Lease Service | Flatonia, TX 78941 | Oil & Gas Operator | Jul 1994 |
| 14 | Senora Resources, Inc. | Dime Box, TX 77853 | Oil & Gas Operator | Oct 2025 |
| 15 | Sha-Jam Operating Corp. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 16 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Oct 2025 |
| 17 | Showdown Energy Corporation | Dallas, TX 75230 | Oil & Gas Operator | Aug 2003 |
| 18 | Showdown Operating, Inc. | Dallas, TX 75230 | Oil & Gas Operator | May 1996 |
| 19 | Silver Oak Operating, Inc. | Longview, TX 75601 | Oil & Gas Operator | Dec 2009 |
| 20 | Silver Oak Operating, LLC | Longview, TX 75604 | Oil & Gas Operator | Oct 2025 |
| 21 | Silver Pines Energy Corp. | Houston, TX 77005 | Oil & Gas Operator | May 2025 |
| 22 | Silverbow Resources Oper, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 23 | SN Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | May 2023 |
| 24 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 25 | Somont Oil Co., Inc. | Spring, TX 77379 | Oil & Gas Operator | Jul 2025 |
| 26 | Southern Bay Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2013 |
| 27 | Southwest Land & Minerals, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Aug 2003 |
| 28 | Southwest Oil & Land, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 1999 |
| 29 | Southwest Resources, Inc. | Brenham, TX 77834 | Oil & Gas Operator | Oct 2025 |
| 30 | Spiral Energy Corp. | Midland, TX 79705 | Oil & Gas Operator | Dec 2019 |
| 31 | Square One Corporation | Giddings, TX 78942 | Oil & Gas Operator | Dec 2012 |
| 32 | Stanton Mineral Development Inc | Austin, TX 78759 | Oil & Gas Operator | Oct 2025 |
| 33 | Sto Operating Company | San Antonio, TX 78258 | Oil & Gas Operator | Oct 2025 |
| 34 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Oct 2025 |
| 35 | Stroud Energy, LTD. | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2006 |
| 36 | Stroud Oil Properties, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | May 2013 |
| 37 | Summit Exploration, L.L.C. | Tulsa, OK 74119 | Oil & Gas Operator | Mar 2008 |
| 38 | Sutton Producing Corp. | San Antonio, TX 78270 | Oil & Gas Operator | Oct 2025 |
| 39 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |