| 1 | San Antonio Gas & Oil, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2000 |
| 2 | Sanchez Exploration Company LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2024 |
| 3 | Sanhall Corporation | Huntsville, TX 77340 | Oil & Gas Operator | Oct 1993 |
| 4 | Saur, Jerry | Luling, TX 78648 | Oil & Gas Operator | Dec 2015 |
| 5 | Schlachter, David A. | Dallas, TX 75225 | Oil & Gas Operator | Apr 2015 |
| 6 | Scully And Smith Oil Corporation | Salado, TX 76571 | Oil & Gas Operator | Feb 1995 |
| 7 | Scully Energy Corporation | Salado, TX 76571 | Oil & Gas Operator | Mar 2012 |
| 8 | Seaco Production | Dripping SPGS, TX 78620 | Oil & Gas Operator | Feb 2016 |
| 9 | Sellers Lease Service, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Mar 2025 |
| 10 | SGB Oil LLC | Luling, TX 78648 | Oil Operator | Mar 2025 |
| 11 | Shale Operating Co. | Dallas, TX 75356 | Oil & Gas Operator | Mar 2025 |
| 12 | Shefts & Shefts, Inc. | Luling, TX 78648 | Oil & Gas Operator | Mar 2025 |
| 13 | Shell Trading Us Company | Houston, TX 77210 | Oil & Gas Operator | Dec 2024 |
| 14 | Shidler, Mark L., Inc. | Houston, TX 77055 | Oil & Gas Operator | Mar 2025 |
| 15 | Shiloh Oil Company LLC | Williston, FL 32696 | Oil & Gas Operator | Mar 2025 |
| 16 | Short Oil Co | Luling, TX 78648 | Oil & Gas Operator | Dec 2024 |
| 17 | SHWJ Oil & Gas Co., Inc. | Oil City, LA 71061 | Oil Operator | Mar 2025 |
| 18 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Mar 2025 |
| 19 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 20 | Solutions Projects And Consulting, LLC | Houston, TX 77070 | Oil Operator | Mar 2025 |
| 21 | Somont Oil Co., Inc. | Spring, TX 77379 | Oil & Gas Operator | Jan 2025 |
| 22 | Sotol Energy, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Mar 2025 |
| 23 | South West Texas Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Feb 2000 |
| 24 | Southern Royalty Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Feb 1997 |
| 25 | Southridge Operating Company | San Marcos, TX 78667 | Oil & Gas Operator | Mar 2025 |
| 26 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Mar 2025 |
| 27 | Spencer-Cloughly Investments Inc | San Marcos, TX 78666 | Oil & Gas Operator | Aug 2002 |
| 28 | Spiller, H. G. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1993 |
| 29 | Spiller, J. A. Company | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 30 | Spiller, J.A. | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 31 | Spiller, Joseph A. | Austin, TX 78746 | Oil & Gas Operator | Oct 1993 |
| 32 | Springs, Jesse | Luling, TX 78648 | Oil & Gas Operator | Jun 1998 |
| 33 | Stevenson, Ken & Associates, Inc | La Grange, TX 78945 | Oil & Gas Operator | Sep 2002 |
| 34 | Stonegate Operators, Inc. | Addison, TX 75001 | Oil Operator | Mar 2025 |
| 35 | Stratco Operating Co., Inc. | Austin, TX 78701 | Oil & Gas Operator | Mar 2025 |
| 36 | Success Oil Company, Inc. | Beverly Hills, CA 90211 | Oil & Gas Operator | Mar 2025 |
| 37 | Syj Oil & Gas | San Antonio, TX 78209 | Oil Operator | Sep 2000 |
| 38 | Syj Oil & Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2025 |