| 1 | Safari Oil Corporation | Gainesville, TX 76240 | Oil & Gas Operator | Sep 2003 |
| 2 | Sage Natural Resources LLC | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2024 |
| 3 | Sage Oil And Gas, LLC | Graham, TX 76450 | Gas Operator | Dec 2024 |
| 4 | Sand Springs Oil & Gas Co. | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2024 |
| 5 | Sauder Management Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2024 |
| 6 | Schalk, Thomas S. | Wichita Falls, TX 76301 | Oil & Gas Operator | Aug 1995 |
| 7 | Seelye, William L. | Plano, TX 75024 | Oil & Gas Operator | Oct 2005 |
| 8 | Seiguf Oil Company, Inc. | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2024 |
| 9 | Seitz, Comegys & Seitz | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 1994 |
| 10 | Seitz, J. R. & Adam | Wichita Falls, TX 76307 | Oil & Gas Operator | Mar 2008 |
| 11 | Seitz, J. R. & Adam, LTD. | Wichita Falls, TX 76307 | Oil Operator | Dec 2024 |
| 12 | Sendero Energy Inc. | Dallas, TX 75205 | Oil & Gas Operator | Dec 2024 |
| 13 | Service Clearing Corp. | Dallas, TX 75229 | Oil & Gas Operator | Dec 2024 |
| 14 | Silver Creek Oil & Gas, LLC | Flower Mound, TX 75022 | Oil & Gas Operator | Dec 2024 |
| 15 | Silver Creek Resources, LLC | Irving, TX 75038 | Oil & Gas Operator | Apr 2017 |
| 16 | Ski Production, LLC | Muenster, TX 76252 | Oil Operator | Dec 2024 |
| 17 | Slick Production, LLC | Muenster, TX 76252 | Oil & Gas Operator | Dec 2024 |
| 18 | Smith Oil Company | Smackover, AR 71762 | Oil Operator | Jun 2024 |
| 19 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | Dec 2024 |
| 20 | Smith, Joe H. | Argyle, TX 76226 | Oil & Gas Operator | Nov 1998 |
| 21 | SNR Operating, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2024 |
| 22 | Snuggs Oil Company | Gainesville, TX 76240 | Oil & Gas Operator | Jan 2024 |
| 23 | Spitfire Partners, LLC | Dallas, TX 75225 | Oil Operator | Dec 2024 |
| 24 | SSC, Inc. | Lubbock, TX 79408 | Oil & Gas Operator | Dec 2024 |
| 25 | St. Cajetan Oil Company, LLC | Gainesville, TX 76241 | Oil & Gas Operator | Dec 2024 |
| 26 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 27 | St. Mary Operating Company | Denver, CO 80203 | Oil & Gas Operator | Mar 2019 |
| 28 | Stahl Petroleum Co. | Amarillo, TX 79118 | Oil & Gas Operator | Aug 2003 |
| 29 | Star-Jet Co. | Gainesville, TX 76240 | Oil Operator | Dec 2024 |
| 30 | Staub, Larry | Richardson, TX 75080 | Oil & Gas Operator | Aug 2003 |
| 31 | Staub, Larry, Inc. | Azle, TX 76020 | Oil & Gas Operator | Dec 2024 |
| 32 | Stryker Energy Corp. | Mesquite, TX 75180 | Oil & Gas Operator | Dec 2024 |
| 33 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 34 | Sydri Operating, LLC | Dallas, TX 75231 | Oil & Gas Operator | Dec 2024 |
| 35 | Syntax Energy Corporation | Denton, TX 76210 | Oil Operator | Dec 2024 |