| 21501 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Jul 2025 |
| 21502 | Pa DCNR State Parks Bur | Harrisburg, PA 17105-8551 | Gas Operator | Dec 2024 |
| 21503 | Pa Dep Ofc Oil & Gas MGMT | Harrisburg, PA 17105-8765 | Gas Operator | Dec 1990 |
| 21504 | Pa Gen Energy Co LLC | Warren, PA 16365-2510 | Oil & Gas Operator | May 2025 |
| 21505 | Pa Gen Energy Corp | Warren, PA 16365-2510 | Oil & Gas Operator | Dec 2002 |
| 21506 | Pa Land Holdings Corp | Waynesburg, PA 15370-3020 | Oil & Gas Operator | Dec 2011 |
| 21507 | Pa Land Holdings LLC | Waynesburg, PA 15370-3020 | Gas Operator | Dec 2017 |
| 21508 | Pa Mineral SVCS LLC | Indiana, PA 15701 | Oil & Gas Operator | Dec 2024 |
| 21509 | Pa Prod SVC Inc | Indiana, PA 15701-0421 | Oil & Gas Operator | Dec 2024 |
| 21510 | Pa Prospect LLC | Columbus, MT 59019 | Oil & Gas Operator | Jul 2020 |
| 21511 | Pa State Sys Of Higher Ed Indiana Univ | Indiana, PA 15705-0001 | Gas Operator | Dec 2012 |
| 21512 | Pablo Energy II, LLC | Amarillo, TX 79105 | Oil & Gas Operator | Apr 2025 |
| 21513 | Pablo Energy, Inc. | Pampa, TX 79065 | Oil & Gas Operator | Dec 2005 |
| 21514 | Pac Drilling LLC | Bolivar, OH 44612 | Oil & Gas Operator | Dec 2024 |
| 21515 | Pace And Ray Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Jul 2025 |
| 21516 | Pace Co/Chas E Hall | Marietta, OH 45750 | Oil & Gas Operator | Dec 1990 |
| 21517 | Pace Diversified Corporation | | Oil & Gas Operator | Apr 2025 |
| 21518 | Pace Exploration LLC | Tulsa, OK 74133 | Oil & Gas Operator | Apr 2025 |
| 21519 | Pace Oil And Gas Company | Austin, TX 78715 | Oil & Gas Operator | Jul 2025 |
| 21520 | Pace Operating | Abilene, TX 79608 | Oil & Gas Operator | Jul 2025 |
| 21521 | Pace Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Jul 2025 |
| 21522 | Pace Production Co. | San Angelo, TX 76902 | Oil & Gas Operator | Jul 2025 |
| 21523 | Pace Royalty Trust Fund, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Nov 2001 |
| 21524 | Pace West Production LC | San Angelo, TX 76904 | Oil & Gas Operator | Sep 1995 |
| 21525 | Pacer Resources, Inc. | Calgary, AB T3H 3J9 | Gas Operator | Dec 2001 |
| 21526 | Pacesetter Energy, Inc. | Flower Mound, TX 75028 | Oil & Gas Operator | May 2008 |
| 21527 | Pacesetter Energy, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Jul 2020 |
| 21528 | Pacific Alliance Medical Center | | Oil Operator | Dec 2007 |
| 21529 | Pacific Atlantic Oil Co. | | Oil & Gas Operator | Dec 2003 |
| 21530 | Pacific Atlantic Resources, Inc. | | Oil & Gas Operator | Dec 2021 |
| 21531 | Pacific Coast Energy Company LP | | Oil & Gas Operator | May 2025 |
| 21532 | Pacific Energy & Mining Company | Reno, NV 89511 | Oil & Gas Operator | Aug 2020 |
| 21533 | Pacific Energy Resources Inc. | | Oil Operator | Apr 2025 |
| 21534 | Pacific Energy Resources LTD | | Oil & Gas Operator | Sep 2009 |
| 21535 | Pacific Enterprise Oil Co USA | Los Angeles, CA 90071-2005 | Oil & Gas Operator | Aug 2012 |
| 21536 | Pacific Enterprises Oil Co USA | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 21537 | Pacific Enterprises Royalty Co | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 21538 | Pacific Exploration Oper Co, LLC | Houston, TX 77057 | Oil Operator | Jul 2025 |
| 21539 | Pacific Gas And Electric Company | | Gas Operator | May 2025 |
| 21540 | Pacific Inland Operating Corporation | | Gas Operator | Dec 1993 |
| 21541 | Pacific Natural Gas Explor | | Oil & Gas Operator | Dec 1974 |
| 21542 | Pacific Operators, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 1999 |
| 21543 | Pacific Palms Petroleum LLC | | Oil & Gas Operator | May 2025 |
| 21544 | Pacific Petroleum Technology LLC | | Oil & Gas Operator | Dec 2018 |
| 21545 | Pacific Trans Supply | Vernal, UT 84078 | Oil & Gas Operator | Jul 1987 |
| 21546 | Pacific Transmission Supply | | Oil & Gas Operator | Dec 1987 |
| 21547 | Pack-Man Energy Company | Ranger, TX 76470 | Oil & Gas Operator | Nov 2005 |
| 21548 | Packard Energy LLC | Medicine Lodge, KS 67104 | Oil & Gas Operator | Mar 2025 |
| 21549 | Packard Gas Company | Irving, TX 75063 | Oil & Gas Operator | Nov 2006 |
| 21550 | Packard, Lynn | Medicine Lodge, KS | Oil & Gas Operator | Feb 2025 |
| 21551 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 21552 | Pada Petroleum, Inc. | Maple City, KS 67102 | Oil & Gas Operator | Mar 2025 |
| 21553 | Padco LLC | | Oil & Gas Operator | May 2025 |
| 21554 | Padgett Oil Inc. | Sedan, KS 67361 | Oil Operator | May 2006 |
| 21555 | Padon, Frank B. Oil Oper., Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1998 |
| 21556 | Padre Oil Co. | | Oil & Gas Operator | Apr 2025 |
| 21557 | Page Development, L.L.C. | | Oil Operator | Dec 2024 |
| 21558 | Page Energy | Eldorado, TX 76936 | Oil & Gas Operator | Mar 1997 |
| 21559 | Page Exploration | Midland, TX 79701 | Oil & Gas Operator | Apr 2007 |
| 21560 | Page Lew Barron | | Oil Operator | Dec 2024 |
| 21561 | Page Oil & Gas, LLC | Midland, TX 79701 | Oil & Gas Operator | Jul 2025 |
| 21562 | Page Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Aug 2010 |
| 21563 | Page Petroleum Inc | Calgary, AB T2P3M-3000 | Oil & Gas Operator | Nov 1998 |
| 21564 | Page, Allen | | Oil & Gas Operator | Dec 2014 |
| 21565 | Paine Petroleum Company LLC | | Oil Operator | Dec 2013 |
| 21566 | Paint Rock Operating, LLC | San Angelo, TX 76904 | Oil & Gas Operator | Jul 2025 |
| 21567 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |
| 21568 | Painter & McPhail | Bartlesville, OK 74006 | Oil Operator | Sep 1996 |
| 21569 | Painter Oil And Gas LTD. | | Oil & Gas Operator | Jun 1986 |
| 21570 | Painter Oil Comp | | Oil & Gas Operator | Jul 1993 |
| 21571 | Pairadice Oil And Gas Company LLC | Caldwell, TX 77836 | Oil Operator | Jul 2025 |
| 21572 | Paisano Minerals Company | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 2003 |
| 21573 | Paisano Petroleum, Inc. | San Antonio, TX 78246 | Oil & Gas Operator | Dec 2016 |
| 21574 | Paisano Production, Inc. | Somerset, TX 78069 | Oil Operator | Jul 2025 |
| 21575 | Paiute Oil & Mining Corp | Salt Lake City, UT 84117 | Oil & Gas Operator | Jun 1989 |
| 21576 | Pajaro Energy LLC | Santa Fe, NM 87501 | Oil & Gas Operator | Dec 2023 |
| 21577 | Pak Energy LLC | Calgary, AB T3A-5E8 | Oil Operator | Sep 2022 |
| 21578 | Pal Energy LLC | Guymon, OK 73942-1950 | Gas Operator | Aug 2009 |
| 21579 | Pal Kids Inc | Coronado, CA 92118 | Oil & Gas Operator | Nov 2000 |
| 21580 | Pal LLC | Gillette, WY 82718 | Oil Operator | Dec 2019 |
| 21581 | Palace Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2007 |
| 21582 | Palace Operating Company | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2009 |
| 21583 | Paladar Investments I, L.L.C. | Houston, TX 77090 | Oil & Gas Operator | Feb 2013 |
| 21584 | Paladin Drilling Company | McLeod, TX 75565 | Gas Operator | Sep 2011 |
| 21585 | Paladin Energy Corp. | Dallas, TX 75229 | Oil & Gas Operator | Jul 2017 |
| 21586 | Paladin Energy Partner LLC | Denver, CO 80201 | Oil & Gas Operator | Aug 2006 |
| 21587 | Paladin Energy Partners LLC | | Oil & Gas Operator | Dec 2006 |
| 21588 | Paladin Exploration Co., Inc. | Plano, TX 75093 | Oil & Gas Operator | Feb 1995 |
| 21589 | Paladin Petroleum III, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Jul 2025 |
| 21590 | Paladin-Hayes, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Dec 1999 |
| 21591 | Paleo Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jul 2025 |
| 21592 | Paleo Oil Company LLC | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Jul 2025 |
| 21593 | Paleo, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2025 |
| 21594 | Palisades Asset Holding Co LLC | Dallas, TX 75201 | Oil & Gas Operator | Aug 2017 |
| 21595 | Palisades Operating Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2025 |
| 21596 | Palizay, Paul | Alden, NY 14004 | Gas Operator | Dec 2024 |
| 21597 | Palm Energy Offshore, L.L.C. | | Oil & Gas Operator | Apr 2019 |
| 21598 | Palm Oil & Gas Company | Sedona, AZ 86340 | Oil & Gas Operator | May 2025 |
| 21599 | Palm Operating LLC | Oklahoma City, OK 73106-5646 | Oil & Gas Operator | Nov 2019 |
| 21600 | Palmer Engineering, Inc. | Luray, KS 67649 | Gas Operator | Mar 2000 |