| 501 | Paulico Resources, Inc. | | Oil & Gas Operator | Dec 2021 |
| 502 | Pauls Valley Disposal LLC | Kingston, OK 73439-2130 | Oil Operator | Mar 2015 |
| 503 | Paulsen Petroleu | | Oil Operator | Feb 1994 |
| 504 | Pautsky, Jimmy | Wichita Falls, TX 76308 | Oil & Gas Operator | Sep 2026 |
| 505 | Pautsky, Jimmy Estate Of | Wichita Falls, TX 76308 | Oil Operator | Jan 2022 |
| 506 | Pavlas Oil & Gas | Rockdale, TX 76567 | Oil & Gas Operator | Sep 2026 |
| 507 | Paw Oil And Gas LTD | North Canton, OH 44720 | Oil & Gas Operator | Dec 2024 |
| 508 | Pawnee Oil And Gas, Inc. | Richardson, TX 75083 | Oil & Gas Operator | May 2023 |
| 509 | Pawnee Oil Corp. | | Oil Operator | May 2003 |
| 510 | Pawnee Oil, LLC | Overland Park, KS 66221 | Oil Operator | Aug 2025 |
| 511 | Pawnee Petroleum Company | Seminole, OK 74868-0951 | Oil & Gas Operator | Feb 2023 |
| 512 | Pax Energy LLC | Oklahoma City, OK 73112-7371 | Oil Operator | Sep 2021 |
| 513 | Pax Energy LTD | Elmhurst, IL 60126 | Oil & Gas Operator | Dec 1998 |
| 514 | Pax Petroleum Corporation | La Jolla, CA 92037 | Oil & Gas Operator | Mar 2008 |
| 515 | Paxco, Inc. | Hays, KS 67601 | Oil & Gas Operator | Apr 2026 |
| 516 | Paxton Oil Company | | Oil & Gas Operator | Dec 2024 |
| 517 | Paxton Petroleum, LTD. | | Oil & Gas Operator | May 1989 |
| 518 | Paxton Resources LLC | | Oil & Gas Operator | Jul 2026 |
| 519 | Pay Oil, L. L. C. | | Oil & Gas Operator | Jan 2025 |
| 520 | Pay Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 521 | Pay Ventures, L.L.C. | | Oil Operator | Dec 2024 |
| 522 | Payne Charlie D | Lawton, OK 73505 | Oil & Gas Operator | May 2001 |
| 523 | Payne Exploration Company | Crescent, OK 73028 | Oil & Gas Operator | May 2026 |
| 524 | Payne Petroleum | Abilene, TX 79604 | Oil & Gas Operator | Sep 2026 |
| 525 | Payne Producing Co. | Fredericksbrg, TX 78624 | Oil & Gas Operator | Jun 2008 |
| 526 | Payne W C Family Trust | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | Mar 2015 |
| 527 | Payne, B.R. Oil & Gas, Inc. | Corpus Christ, TX 78411 | Oil & Gas Operator | Feb 2006 |
| 528 | Payne, Frank O | | Oil Operator | Aug 1999 |
| 529 | Payne, George A | Newburgh, IN 47629 | Oil Operator | Dec 2023 |
| 530 | Payne, H Jennings Dba Payne Bros | Newburgh, IN 47630 | Oil Operator | Dec 2023 |
| 531 | Payne, Lawrence R Dba Payne DRLG Co | Philpot, KY 42366 | Oil Operator | Dec 2022 |
| 532 | Payne, Robert E | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 533 | Payne, Sean And Heather | Cherry Creek, NY 14723 | Gas Operator | Dec 2025 |
| 534 | Payne, W. C. | Nichols Hill, OK 73116 | Oil & Gas Operator | Sep 2005 |
| 535 | Payne-Johnston | Tyler, TX 75702 | Oil & Gas Operator | Nov 1996 |
| 536 | Payne-Johnston & Byars | Tyler, TX 75702 | Oil & Gas Operator | Jun 1997 |
| 537 | Payneco Pipeline Company | Yale, OK 74085 | Oil & Gas Operator | Dec 2000 |
| 538 | Payola Productions | Athens, TX 75751 | Oil & Gas Operator | Nov 1994 |
| 539 | Payrock Energy LLC | Oklahoma City, OK 73134-2612 | Oil & Gas Operator | Feb 2023 |
| 540 | Payrock II, LLC | Houston, TX 77007 | Oil & Gas Operator | Dec 2020 |
| 541 | Payson Operating, LLC | Argyle, TX 76226 | Oil & Gas Operator | Mar 2018 |
| 542 | Paystone Oil Corporation | Tulsa, OK 74105 | Oil Operator | Mar 2009 |
| 543 | PB Oil Company | Vernon, TX 76385 | Oil & Gas Operator | Oct 2023 |
| 544 | Pbex Operations, LLC | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 545 | Pbex-MCM Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 546 | PBT Enterprises Inc | Garber, OK 73738 | Oil & Gas Operator | Jun 2023 |
| 547 | PCL Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | May 2026 |
| 548 | Pcore Exploration & Prod II LLC | Golden, CO 80401 | Oil & Gas Operator | Jun 2020 |
| 549 | PCR Operating LLC | | Oil & Gas Operator | Jul 2024 |
| 550 | PD Valentine Oil & Gas LLC | Newport, OH 45768 | Oil & Gas Operator | Dec 2025 |
| 551 | PDC Corporation | | Oil & Gas Operator | Jan 2011 |
| 552 | PDC Energy | Denver, CO 80203 | Oil & Gas Operator | Nov 2012 |
| 553 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | May 2026 |
| 554 | PDC Mountaineer LLC | Wexford, PA 15090-3400 | Oil & Gas Operator | Dec 2017 |
| 555 | PDC Permian, Inc. | Midland, TX 79706 | Oil & Gas Operator | Sep 2026 |
| 556 | PDC-WV-Co Corporation | Denver, CO 80203 | Oil & Gas Operator | Aug 2010 |
| 557 | Pdeh LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 558 | PDG Production LLC | Stroud, OK 74079 | Oil & Gas Operator | Jun 2026 |
| 559 | PDH Enterprises | Pittsburg, TX 75686 | Oil & Gas Operator | Apr 2019 |
| 560 | PDQ Oil & Gas LLC | The Plains, OH 45780 | Oil & Gas Operator | Dec 2025 |
| 561 | PDS Resources LLC | | Oil & Gas Operator | May 2026 |
| 562 | Pe - Osage, LLC | | Oil Operator | May 2026 |
| 563 | Pe - Texas, LLC | Oklahoma City, OK 73113 | Oil Operator | Sep 2026 |
| 564 | Peabody Natural Gas LLC | Gillette, WY 82718 | Oil & Gas Operator | Jul 2026 |
| 565 | Peach Creek Operating Co, LLC | Houston, TX 77219 | Oil & Gas Operator | Sep 2026 |
| 566 | Peachridge Energy Operating LLC | Oklahoma City, OK 73159 | Oil & Gas Operator | Jun 2026 |
| 567 | Peachtree Production Co. | | Oil & Gas Operator | Mar 1981 |
| 568 | Peacock, Scott | Edmonton, KY 42129 | Oil Operator | Dec 2023 |
| 569 | Peak Energy Co Inc | | Oil & Gas Operator | Mar 1985 |
| 570 | Peak Energy Corporation | Plano, TX 75093 | Oil & Gas Operator | Oct 2018 |
| 571 | Peak Energy LLC | Coffeyville, KS 67337 | Oil & Gas Operator | Dec 2022 |
| 572 | Peak Energy Operating #2, LLC | Durango, CO 81301 | Oil & Gas Operator | Jun 2006 |
| 573 | Peak Flow Operating&Drilling LP | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2011 |
| 574 | Peak Natural Gas Co., LLC | Dallas, TX 75225 | Oil & Gas Operator | Sep 2010 |
| 575 | Peak Nebraska Acquisitions, LLC | | Oil Operator | Dec 2010 |
| 576 | Peak Oil Company LLC | Branson West, MO 65737 | Oil Operator | Dec 2009 |
| 577 | Peak Operating Co. | | Oil & Gas Operator | Jul 2024 |
| 578 | Peak Operating LLC | Oklahoma City, OK 73157 | Oil & Gas Operator | Apr 2026 |
| 579 | Peak Operating Of Texas, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 580 | Peak Operating Oil & Gas LLC | Wichita, KS 67226 | Oil & Gas Operator | May 2026 |
| 581 | Peak Operator LLC | | Oil & Gas Operator | Dec 2025 |
| 582 | Peak Pipeline Company | Plano, TX 75093 | Oil & Gas Operator | Oct 2007 |
| 583 | Peak Powder River Resources LLC | Durango, CO 81301 | Oil & Gas Operator | Jun 2026 |
| 584 | Peak Texas Resources, LLC | Durango, CO 81301 | Oil & Gas Operator | Mar 2017 |
| 585 | Peake Operating Company | | Oil & Gas Operator | Dec 1999 |
| 586 | Peakview Oil Company LLC | Denver, CO 80202 | Gas Operator | Jul 2026 |
| 587 | Peakview Operating Company, LLC | | Oil & Gas Operator | May 2026 |
| 588 | Pearce Leonard | Manderson, WY 82432 | Oil Operator | Dec 1999 |
| 589 | Pearce Mary | | Oil Operator | Dec 1999 |
| 590 | Pearce Oil Company | Manderson, WY 82432 | Oil Operator | Jun 1999 |
| 591 | Pearce Trust And Blair | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 592 | Pearce, Roy F., Jr. | Midland, TX 79702 | Oil & Gas Operator | Sep 2026 |
| 593 | Pearl Energy, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Apr 2002 |
| 594 | Pearl Oil Company | Nichols Hills, OK 73120-1408 | Oil & Gas Operator | Nov 2023 |
| 595 | Pearl Petroleum Inc | Lawton, OK 73501-5821 | Oil & Gas Operator | Jan 2014 |
| 596 | Pearl Resources Inc. | | Oil & Gas Operator | Jul 1990 |
| 597 | Pearl Resources Operating Co.LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2026 |
| 598 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Sep 2026 |
| 599 | Pearsall Partners | Dallas, TX 75201 | Oil & Gas Operator | Mar 1993 |
| 600 | Pearson, A. K. | Amarillo, TX 79114 | Oil & Gas Operator | Aug 2023 |