| 301 | Shiloh Oil Company LLC | Williston, FL 32696 | Oil & Gas Operator | Apr 2024 |
| 302 | Short Oil Co | Luling, TX 78648 | Oil & Gas Operator | Jan 2024 |
| 303 | SHWJ Oil & Gas Co., Inc. | Oil City, LA 71061 | Oil Operator | Apr 2024 |
| 304 | Signal Oil And Gas Company | Colleyville, TX 76034 | Oil & Gas Operator | Apr 2024 |
| 305 | Smith Petroleum Company | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 306 | Somont Oil Co., Inc. | Spring, TX 77379 | Oil & Gas Operator | Apr 2024 |
| 307 | Sotol Energy, Inc. | Magnolia, TX 77354 | Oil & Gas Operator | Apr 2024 |
| 308 | South West Texas Oil & Gas, Inc. | Luling, TX 78648 | Oil & Gas Operator | Feb 2000 |
| 309 | Southern Royalty Inc. | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Feb 1997 |
| 310 | Southridge Operating Company | San Marcos, TX 78667 | Oil & Gas Operator | Apr 2024 |
| 311 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 312 | Spencer-Cloughly Investments Inc | San Marcos, TX 78666 | Oil & Gas Operator | Aug 2002 |
| 313 | Spiller, H. G. | San Antonio, TX 78213 | Oil & Gas Operator | Oct 1993 |
| 314 | Spiller, J. A. Company | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 315 | Spiller, J.A. | Austin, TX 78735 | Oil & Gas Operator | Jan 2016 |
| 316 | Spiller, Joseph A. | Austin, TX 78746 | Oil & Gas Operator | Oct 1993 |
| 317 | Springs, Jesse | Luling, TX 78648 | Oil & Gas Operator | Jun 1998 |
| 318 | Stevenson, Ken & Associates, Inc | La Grange, TX 78945 | Oil & Gas Operator | Sep 2002 |
| 319 | Stonegate Operators, Inc. | Addison, TX 75001 | Oil Operator | Apr 2024 |
| 320 | Stratco Operating Co Inc | Austin, TX 78701 | Oil & Gas Operator | Apr 2024 |
| 321 | Success Oil Company, Inc. | Beverly Hills, CA 90211 | Oil & Gas Operator | Apr 2024 |
| 322 | Syj Oil & Gas | San Antonio, TX 78209 | Oil Operator | Sep 2000 |
| 323 | Syj Oil & Gas, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2024 |
| 324 | Team Operating, L.L.C. | Pinehurst, TX 77362 | Oil & Gas Operator | Apr 2024 |
| 325 | Tejones Operating Corporation | San Antonio, TX 78217 | Oil & Gas Operator | Apr 2024 |
| 326 | Texas Petroleum Investment Company | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 327 | Texas Vanguard Oil Company | Austin, TX 78720 | Oil & Gas Operator | Jan 2014 |
| 328 | Texian Operating Company, LLC | Irving, TX 75063 | Oil & Gas Operator | Apr 2024 |
| 329 | Texlan Oil Company, Inc. | Tyler, TX 75701 | Oil & Gas Operator | Nov 1994 |
| 330 | Texstar Oil & Gas, LLC | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 331 | Thomas Oil & Gas Company | Luling, TX 78648 | Oil & Gas Operator | Aug 2003 |
| 332 | Tilmon Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Sep 2012 |
| 333 | Titan Exploration LLC | Luling, TX 78648 | Oil & Gas Operator | Feb 2024 |
| 334 | Trace Energy Management Inc | Weatherford, TX 76086 | Oil & Gas Operator | Apr 2024 |
| 335 | Tri-County Operating Company | Seguin, TX 78156 | Gas Operator | Feb 1997 |
| 336 | Trinidad Petroleum, Inc. | Austin, TX 78711 | Oil & Gas Operator | Apr 2024 |
| 337 | Triple C Oil Inc. | Lockhart, TX 78644 | Oil Operator | Aug 2019 |
| 338 | Tristar Exploration, Inc | Pflugerville, TX 78660 | Oil & Gas Operator | Apr 2024 |
| 339 | Truth Resources LP | Conroe, TX 77304 | Oil Operator | Sep 2021 |
| 340 | Tuleta Energy Partners, LLC | Norman, OK 73072 | Oil & Gas Operator | Apr 2024 |
| 341 | Tuthill & Barbee | Amarillo, TX 79101 | Oil & Gas Operator | Nov 1994 |
| 342 | TX Lone Star Operating Co, LLC | Sulphur SPGS, TX 75483 | Oil & Gas Operator | Apr 2024 |
| 343 | Txla Energy, Inc. | Houston, TX 77018 | Oil & Gas Operator | Apr 2024 |
| 344 | United Operating, LLC *** | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 345 | USA Superior Energy LLC | Houston, TX 77077 | Oil Operator | Mar 2010 |
| 346 | Uvalde Energy Co. | Austin, TX 78747 | Oil & Gas Operator | Nov 1994 |
| 347 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Jan 2024 |
| 348 | Vintage Petroleum, LLC | Houston, TX 77210 | Oil & Gas Operator | Dec 2023 |
| 349 | Vista Energy Corp. | Good Lettsvle, TN 37072 | Oil & Gas Operator | Apr 2024 |
| 350 | Vomela Resources Inc. | Flatonia, TX 78941 | Oil & Gas Operator | Apr 2024 |
| 351 | W.W. Energy | Luling, TX 78648 | Oil & Gas Operator | Apr 2024 |
| 352 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 353 | Weiss Oil Co. | Streator, IL 61364 | Oil & Gas Operator | Dec 1997 |
| 354 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 355 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 356 | Windmill Oil Company | Austin, TX 78747 | Oil & Gas Operator | Mar 2008 |
| 357 | WTXR Operating (Texas), Inc. | Carrollton, TX 75007 | Oil Operator | Apr 2024 |
| 358 | X Stone Energy LLC. | Plano, TX 75093 | Oil & Gas Operator | Apr 2024 |
| 359 | Ynew Corporation | Austin, TX 78747 | Oil & Gas Operator | Apr 2024 |