| 301 | Penergy | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 302 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 303 | Permian Resources Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 304 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 305 | Permian Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 306 | Permian Solutions LLC | Midland, TX 79702 | Oil Operator | May 2025 |
| 307 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 308 | Petro Plex Oil Co Inc. | Homosassa, FL 34448 | Oil & Gas Operator | Jul 2020 |
| 309 | Petro-Raider LLC | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 310 | Petro-Smith Operating LLC | Houston, TX 77010 | Oil & Gas Operator | May 2025 |
| 311 | Petrodata Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 312 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 313 | Petroplex Equipment, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2019 |
| 314 | Pillar Energy, LLC | Charleston, WV 25312-5987-5987 | Oil & Gas Operator | Dec 2024 |
| 315 | Pinon Petroleum, Inc. | San Angelo, TX 76903 | Oil & Gas Operator | Apr 2004 |
| 316 | Pintail Production Co., Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | May 2025 |
| 317 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | May 2025 |
| 318 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 319 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 320 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 321 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 322 | Prasad, Hari Production Co. | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 323 | Prasad, LTD. | Midland, TX 79701 | Oil & Gas Operator | Sep 2006 |
| 324 | Prentice Napier & Green Inc | Oklahoma City, OK 73142 | Oil & Gas Operator | Mar 2025 |
| 325 | Prestonwood Operating LLC | Addison, TX 75001 | Oil Operator | May 2025 |
| 326 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 327 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 328 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |
| 329 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | Feb 2025 |
| 330 | Quatro Oil And Gas, Inc. | Joshua, TX 76058 | Oil & Gas Operator | May 2025 |
| 331 | Quay Valley, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2007 |
| 332 | Queen Sand Operating Co. | Dallas, TX 75240 | Oil & Gas Operator | Mar 2008 |
| 333 | Questa Oil & Gas Co. | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2015 |
| 334 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | May 2024 |
| 335 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | May 2025 |
| 336 | R.K.G. Operations, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Jun 2004 |
| 337 | Rampart Petroleum, Incorporated | Buffalo Gap, TX 79508 | Oil & Gas Operator | Jan 2009 |
| 338 | Ramtex Energy LLC | Tulsa, OK 74114 | Oil & Gas Operator | May 2025 |
| 339 | Rasmussen, Tom | San Angelo, TX 76904 | Oil & Gas Operator | May 2025 |
| 340 | Rayco Operating, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 341 | Redbud E & P, Inc. | Spring, TX 77379 | Oil & Gas Operator | May 2025 |
| 342 | Reliance Operating Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2000 |
| 343 | Remnant Oil Operating, LLC | Midland, TX 79704 | Oil & Gas Operator | Jul 2024 |
| 344 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | May 2025 |
| 345 | Reo Operating LLC | Austin, TX 78747 | Oil & Gas Operator | May 2025 |
| 346 | Riata Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2008 |
| 347 | Ricks Expl Acquisition Corp | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2004 |
| 348 | Ricks Expl Acquisition LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2013 |
| 349 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 350 | Ridgeline Resources, LLC | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 351 | Rio Interstate Oil, Inc. | Oklahoma City, OK 73189 | Oil & Gas Operator | Sep 1994 |
| 352 | Rising Star Energy PTR, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | May 2025 |
| 353 | Rising Star Energy, L.L.C. | Dallas, TX 75219 | Oil & Gas Operator | Aug 2006 |
| 354 | Rivercity Operating, Inc. | Austin, TX 78766 | Oil & Gas Operator | May 2025 |
| 355 | Robertson Resources, Inc. | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 356 | RRP Operating LLC | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 357 | Rusk Co. Well Service Co., Inc. | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 358 | Rwa, LLC | Boyd, TX 76023 | Oil & Gas Operator | May 2025 |
| 359 | S & T Operating, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Jun 2001 |
| 360 | Sable Permian Resources Land,LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2019 |
| 361 | Sable Permian Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2021 |
| 362 | Safemark Oil & Gas, LLC | McKinney, TX 75072 | Oil & Gas Operator | May 2025 |
| 363 | Sage Energy Company | San Antonio, TX 78215 | Oil & Gas Operator | May 2025 |
| 364 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | May 2025 |
| 365 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 366 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 367 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 368 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 369 | Sanchez-O'Brien Oil & Gas Corp | Houston, TX 77057 | Oil & Gas Operator | May 1998 |
| 370 | Sandridge Exploration And Production LLC | Oklahoma City, OK 73104 | Oil & Gas Operator | May 2025 |
| 371 | SBJ Oil & Gas | MC Camey, TX 79752 | Oil & Gas Operator | Feb 2009 |
| 372 | SBJ Oil & Gas, LLC | Iraan, TX 79744 | Oil & Gas Operator | May 2025 |
| 373 | Schkade Exploration | San Angelo, TX 76901 | Oil & Gas Operator | May 2025 |
| 374 | Scout Energy Management LLC | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 375 | Scythian, LTD. | Midland, TX 79701 | Oil & Gas Operator | Dec 2020 |
| 376 | Sed Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 377 | Sem Operating Company LLC | Houston, TX 77042 | Oil & Gas Operator | May 2025 |
| 378 | Siana Oil & Gas | Conroe, TX 77305 | Oil & Gas Operator | May 2025 |
| 379 | Siete Oil And Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Aug 2003 |
| 380 | Sisters Operating Company | Victoria, TX 77904 | Oil & Gas Operator | Nov 2010 |
| 381 | Smith Pipe Of Abilene | Abilene, TX 79608 | Oil & Gas Operator | May 2025 |
| 382 | Snyder Oil Corporation | Houston, TX 77024 | Oil & Gas Operator | Mar 2008 |
| 383 | Socorro Exploration, Inc. | Lubbock, TX 79464 | Oil & Gas Operator | May 2025 |
| 384 | Southern Exploration, Inc. | Fort Worth, TX 76137 | Oil & Gas Operator | Aug 2023 |
| 385 | Southwest Royalties Inc | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 386 | Special Energy Corporation | Stillwater, OK 74076 | Oil & Gas Operator | May 2025 |
| 387 | St. Mary Land & Exploration Co | Denver, CO 80201 | Oil & Gas Operator | Jun 2010 |
| 388 | Stephens, Autry C. | Midland, TX 79701 | Oil & Gas Operator | Mar 2023 |
| 389 | Sterlynn Oil & Gas, Inc. | Harper, TX 78631 | Oil Operator | May 2025 |
| 390 | Strand Energy, Inc. (I) | Houston, TX 77002 | Oil & Gas Operator | Sep 1996 |
| 391 | Strand Energy, L.C. | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 392 | Summit Petroleum LLC | Midland, TX 79705 | Oil & Gas Operator | May 2025 |
| 393 | Sundown Energy LP | Dallas, TX 75248 | Oil & Gas Operator | May 2025 |
| 394 | Swartz Oil Company | San Angelo, TX 76906 | Oil & Gas Operator | May 2025 |
| 395 | Swartz, Guy A. | San Angelo, TX 76904 | Oil & Gas Operator | Aug 1993 |
| 396 | Swift Energy Company | Houston, TX 77060 | Oil & Gas Operator | Mar 2021 |
| 397 | Tall City Operations LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2016 |
| 398 | Targa Midstream Services LLC | Houston, TX 77002 | Oil Operator | Mar 2023 |
| 399 | Tawa Operating Co., Inc. | Mertzon, TX 76941 | Oil & Gas Operator | May 2019 |
| 400 | Tejas Jack Sales, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | May 2025 |