| 1 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2025 |
| 2 | San Isidro Development Co, L. C. | Sandia, TX 78383 | Oil & Gas Operator | Jun 2025 |
| 3 | Sarita Energy Resources, LTD. | Houston, TX 77277 | Oil & Gas Operator | Jun 2025 |
| 4 | Sarrita Oil Co., Inc. | Floresville, TX 78114 | Oil & Gas Operator | Jul 2002 |
| 5 | Schroeder Oil Properties | Graham, TX 76450 | Oil & Gas Operator | Jul 2022 |
| 6 | Seaco Production | Dripping SPGS, TX 78620 | Oil & Gas Operator | Feb 2016 |
| 7 | Seagull Operating Co., Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jan 2025 |
| 8 | Seay Oil & Gas, LTD. | Dripping SPGS, TX 78620 | Oil & Gas Operator | Apr 2013 |
| 9 | Sedco Resources Inc | Kerrville, TX 78029 | Oil & Gas Operator | Jun 2025 |
| 10 | Seeker Oil Company, Incorporated | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2025 |
| 11 | Seguro Well Service, Inc. | Gonzales, TX 78629 | Oil & Gas Operator | Jun 2025 |
| 12 | Sei Operating, LLC | Mandeville, LA 70471 | Oil & Gas Operator | Jun 2025 |
| 13 | Sellers Lease Service, Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Jun 2025 |
| 14 | Sinclair Energy Corporation | Fort Worth, TX 76177 | Oil & Gas Operator | Jun 2025 |
| 15 | Slingshot Oil & Gas | Houston, TX 77019 | Oil Operator | Jun 2025 |
| 16 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Jun 2025 |
| 17 | Source Petroleum Inc. | San Antonio, TX 78265 | Oil & Gas Operator | Jun 2025 |
| 18 | Southwest Gas Systems, Inc. | Spring, TX 77379 | Oil & Gas Operator | Jun 2025 |
| 19 | Southwest Land & Minerals, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Aug 2003 |
| 20 | Spencer-Cloughly Investments Inc | San Marcos, TX 78666 | Oil & Gas Operator | Aug 2002 |
| 21 | Spur Operating Co. | Austin, TX 78701 | Oil & Gas Operator | Jun 2025 |
| 22 | Statia Enterprises, Inc | Irving, TX 75014 | Oil & Gas Operator | Jun 2025 |
| 23 | Steindorf, Bert Oil & Gas Co. | Floresville, TX 78114 | Oil & Gas Operator | Jun 2025 |
| 24 | Steller Energy & Investment Corp | Plano, TX 75093 | Oil & Gas Operator | Feb 2021 |
| 25 | Stoneburner Exploration, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Oct 1997 |
| 26 | Stonegate Operators, Inc. | Addison, TX 75001 | Oil Operator | Jun 2025 |
| 27 | Story NRG LLC | Boerne, TX 78006 | Oil & Gas Operator | Jun 2025 |
| 28 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2025 |
| 29 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Jun 2025 |
| 30 | Struthoff Energy, L.L.C. | San Antonio, TX 78216 | Oil Operator | Jun 2025 |
| 31 | Sue-Ann Production Company | Victoria, TX 77903 | Oil & Gas Operator | Mar 2008 |
| 32 | Sunburst, Inc. | Wheat Ridge, CO 80033 | Oil & Gas Operator | Mar 2025 |
| 33 | Sure Flow Oil & Gas, Inc. | Victoria, TX 77902 | Oil & Gas Operator | Jun 2025 |
| 34 | Swiess & Thomas | San Antonio, TX 78247 | Oil Operator | Jun 2025 |
| 35 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 36 | Syj Oil & Gas | San Antonio, TX 78209 | Oil Operator | Sep 2000 |
| 37 | Syj Oil & Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Jun 2025 |
| 38 | Sylvan Energy, LLC | Pittsburgh, PA 15211 | Oil & Gas Operator | Jun 2025 |
| 39 | Symba American Oil, Inc | Houston, TX 77056 | Oil Operator | Jun 2025 |