| 401 | Pathfinder Exploration LLC | Norman, OK 73069-8516 | Gas Operator | Nov 2008 |
| 402 | Patriot Production LLC | Southlake, TX 76092 | Oil & Gas Operator | Apr 2023 |
| 403 | Pbex Operations, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 404 | Pech Oil Co., No. 2 | Midland, TX 79702 | Oil & Gas Operator | Apr 2013 |
| 405 | Pech Oil Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2013 |
| 406 | Pecos Operating Company, LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2021 |
| 407 | Pecos Valley Management Co. | Dallas, TX 75206 | Oil & Gas Operator | Aug 2008 |
| 408 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 409 | Peery, J. W. | Midland, TX 79701 | Oil & Gas Operator | Aug 2007 |
| 410 | Penn VIrginia Oil & Gas, L.P. | Houston, TX 77084 | Oil & Gas Operator | Nov 2022 |
| 411 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 412 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 413 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Apr 2024 |
| 414 | Perenco LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 415 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 416 | Permian Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2018 |
| 417 | Peterson Oil And Gas LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2024 |
| 418 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 419 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 420 | Petroplex Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 421 | Petroplex Equipment, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2019 |
| 422 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 423 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2024 |
| 424 | Phillips 66 Company | Bartlesville, OK 74004 | Oil & Gas Operator | Aug 1997 |
| 425 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 426 | Phoenix Hydrocarbons Operating | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 427 | Pillar Energy, LLC | Charleston, WV 25312-5987-5987 | Oil & Gas Operator | Dec 2023 |
| 428 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Jan 2024 |
| 429 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Jan 2024 |
| 430 | Pioneer Exploration, LTD. | Houston, TX 77090 | Oil & Gas Operator | Sep 2008 |
| 431 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2024 |
| 432 | Pitts Energy Co. | Midland, TX 79707 | Oil & Gas Operator | Apr 2024 |
| 433 | Plains Marketing LP | Cushing, OK 74023 | Oil & Gas Operator | Dec 2022 |
| 434 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 435 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 436 | Platform Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 437 | Platinum Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 438 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 439 | Polaris Production Corp. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 440 | Powerline Energy Corporation | Arlington, TX 76015 | Oil & Gas Operator | Apr 2024 |
| 441 | Primal Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 442 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 443 | Prospctv Invstmnt & TRDG Co, LTD | Tulsa, OK 74170 | Oil & Gas Operator | May 2001 |
| 444 | PT Petroleum, LLC | Argyle, TX 76226 | Oil & Gas Operator | Oct 2019 |
| 445 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |
| 446 | Purvis Oil Corp | Midland, TX 79702 | Oil & Gas Operator | Jul 1994 |
| 447 | Purvis Operating Co. | Midland, TX 79710 | Oil & Gas Operator | Apr 2024 |
| 448 | Purvis, J. H. | Midland, TX 79702 | Oil & Gas Operator | Dec 1994 |
| 449 | Q Natural Resources, LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 450 | Quantum Resources Management LLC | Houston, TX 77010 | Oil & Gas Operator | Dec 2023 |
| 451 | Quatro Oil And Gas, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2024 |
| 452 | Quay Valley, Inc. | Midland, TX 79710 | Oil & Gas Operator | Oct 2007 |
| 453 | Quicksilver Resources Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Mar 2018 |
| 454 | R K Petroleum Corp. | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 455 | R. K. G. Engineering, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Apr 2024 |
| 456 | R.K.G. Operations, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Jun 2004 |
| 457 | Raider Oil & Gas Company | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2024 |
| 458 | Ram Operating Inc. | Browns, IL 62818 | Oil & Gas Operator | Aug 2008 |
| 459 | Ranger 40 Petroleum, LLC | Fairfield, CT 06824 | Oil & Gas Operator | Apr 2024 |
| 460 | Rattler Midstream Operating LLC | Midland, TX 79701 | Oil Operator | Apr 2024 |
| 461 | Rayden | Midland, TX 79711 | Oil & Gas Operator | Apr 2024 |
| 462 | RBJ & Associates, LP | Midland, TX 79707 | Oil Operator | Jan 2020 |
| 463 | Regions Energy LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2016 |
| 464 | Regions Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 465 | Rein Pusher Operating LLC | Brenham, TX 77834 | Oil & Gas Operator | Apr 2024 |
| 466 | Remnant Oil Operating, LLC | Midland, TX 79704 | Oil & Gas Operator | Dec 2023 |
| 467 | Remuda Operating Company | Midland, TX 79711 | Oil & Gas Operator | Apr 2024 |
| 468 | Rendova Oil Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2002 |
| 469 | Reverence Operating LLC | Odessa, TX 79768 | Oil & Gas Operator | Apr 2024 |
| 470 | Rex Energy Operating Corp. | State College, PA 16801 | Oil & Gas Operator | Jun 2012 |
| 471 | Rhonda Operating Company | Midland, TX 79710 | Oil & Gas Operator | Aug 2017 |
| 472 | Riata Energy Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2008 |
| 473 | Richey Properties, Inc. | Tyler, TX 75711 | Oil & Gas Operator | Apr 2024 |
| 474 | Ricks Exploration, Inc. | Oklahoma City, OK 73154 | Oil & Gas Operator | Mar 2008 |
| 475 | Rittenhouse Oil & Gas Co. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 476 | Rme Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Nov 2016 |
| 477 | Roberts & Hammack, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 478 | Roc Energy, Inc. | Midland, TX 79710 | Oil & Gas Operator | Feb 2013 |
| 479 | Roca Resource Company, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 480 | Rock Well Petroleum (U.S.), Inc. | Canada, 00100 | Oil & Gas Operator | Sep 2014 |
| 481 | Rockport Energy Solutions LLC | Austin, TX 78730 | Oil & Gas Operator | Apr 2024 |
| 482 | Roemer Oil Company | Denver, CO 80202 | Oil & Gas Operator | Nov 1998 |
| 483 | Rogers, M. L. | Midland, TX 79701 | Oil & Gas Operator | Sep 2014 |
| 484 | RP Operating, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 485 | RRP Operating LLC | Houston, TX 77046 | Oil & Gas Operator | Apr 2024 |
| 486 | S & M Drilling, LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2024 |
| 487 | S.B. Street Operating, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 488 | Sabinal Energy Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Apr 2024 |
| 489 | Sabine Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 490 | Sable Permian Resources Land,LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2019 |
| 491 | Sable Permian Resources, LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2021 |
| 492 | Sabre Operating, Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 493 | Sahara Operating Company | Midland, TX 79704 | Oil & Gas Operator | Apr 2024 |
| 494 | Samedan Oil Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2019 |
| 495 | Samson Hydrocarbons Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2016 |
| 496 | Samson Lone Star LP | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2007 |
| 497 | Samson Lone Star, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2024 |
| 498 | Samson Resources Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 499 | San Marco Petroleum Inc | Denver, CO 80293 | Oil & Gas Operator | Jan 2024 |
| 500 | Sandia Production Co., Inc. | Corrales, NM 87048 | Oil & Gas Operator | Apr 2024 |