| 4501 | Pertex Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jul 1996 |
| 4502 | Pet-Ex Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Sep 2025 |
| 4503 | Petco Petroleum Corp | Hinsdale, IL 60521 | Oil & Gas Operator | Dec 2025 |
| 4504 | Petra Petroleum Inc | Littleton, CO 80160-0319 | Oil & Gas Operator | Jun 2005 |
| 4505 | Petra Petroleum Management LLC | Hotchkiss, CO 81419-0369 | Gas Operator | Sep 2014 |
| 4506 | Petro Davis Inc | Oklahoma City, OK 73142-1807 | Oil & Gas Operator | Jan 2013 |
| 4507 | Petro Energy Inc | Farmington, NM 87499 | Oil & Gas Operator | Sep 2025 |
| 4508 | Petro Oilfield Equipment Inc | Drumright, OK 74030-1233 | Oil & Gas Operator | Dec 2010 |
| 4509 | Petro Speed Inc | Norman, OK 73069-8116 | Oil & Gas Operator | Mar 2015 |
| 4510 | Petro Warrior LLC | Wichita, KS 67206 | Oil & Gas Operator | Jan 2026 |
| 4511 | Petro-Chase Energy Corp | Oklahoma City, OK 73135-6205 | Oil & Gas Operator | Jan 2007 |
| 4512 | Petro-Guard Company, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2014 |
| 4513 | Petro-Haley | Borger, TX 79008 | Oil & Gas Operator | Mar 2026 |
| 4514 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 4515 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 4516 | Petro-Mac Corporation | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 4517 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 4518 | Petro-Met Energy LLC | Edmond, OK 73034-1237 | Oil Operator | Dec 2025 |
| 4519 | Petro-X Corporation | Houston, TX 77092 | Oil & Gas Operator | Jul 2002 |
| 4520 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 4521 | Petroda Oil & Gas LLC | Edmond, OK 73054 | Oil & Gas Operator | Feb 2023 |
| 4522 | Petroflow Energy Corporation | Tulsa, OK 74119-5405 | Oil & Gas Operator | Oct 2016 |
| 4523 | Petrogas Exploration Inc | | Oil Operator | Dec 2025 |
| 4524 | Petroglyph Operating Co | Boise, ID 83709 | Oil & Gas Operator | Jul 2017 |
| 4525 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Mar 2026 |
| 4526 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 4527 | Petrojen Production Company Inc | Bakersfield, CA 93311 | Oil Operator | Dec 2025 |
| 4528 | Petrolanic Inc | Tulsa, OK 74105 | Oil Operator | Oct 1991 |
| 4529 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Mar 2026 |
| 4530 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 4531 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2025 |
| 4532 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 4533 | Petroleum Exploration Company LTD LP | Breckenridge, TX 76424 | Oil & Gas Operator | Jan 2026 |
| 4534 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 4535 | Petroleum International, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2000 |
| 4536 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 4537 | Petroleum Management Prof Inc | Oklahoma City, OK 73120-1848 | Oil & Gas Operator | Apr 2009 |
| 4538 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Mar 2026 |
| 4539 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Mar 2026 |
| 4540 | Petroleum Properties Co Inc | Tulsa, OK 74132-4010 | Oil & Gas Operator | Sep 2012 |
| 4541 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 4542 | Petroleum Reserve Corporation | Plymouth MTNG, PA 19462 | Oil & Gas Operator | May 2008 |
| 4543 | Petroleum Resources Co | Wichita, KS 67206 | Oil & Gas Operator | May 2000 |
| 4544 | Petrolia Drilling Corporation | | Oil & Gas Operator | Jul 2003 |
| 4545 | Petrolia Energy Corporation | Pearland, TX 77581 | Oil Operator | Jan 2024 |
| 4546 | Petromark Energy LLC | Oklahoma City, OK 73116-7634 | Oil & Gas Operator | Jun 2000 |
| 4547 | Petromark Resources Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 4548 | Petromerica Operating LLC | Oklahoma City, OK 73102-4613 | Oil Operator | Dec 2025 |
| 4549 | Petron Energy Inc | Dallas, TX 75252 | Oil & Gas Operator | Mar 2026 |
| 4550 | Petron Oil Company | Missouri City, TX 77489 | Oil & Gas Operator | Mar 2026 |
| 4551 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Mar 2026 |
| 4552 | Petroquest Oil & Gas LLC | Wewoka, OK 74884 | Oil & Gas Operator | Jan 2026 |
| 4553 | Petrosearch Operating Co, LLC | Denver, CO 80202 | Oil & Gas Operator | Mar 2026 |
| 4554 | Petrotex, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 4555 | Petrowater Solutions LLC | Oklahoma City, OK 73102-5643 | Oil Operator | Aug 2016 |
| 4556 | Pettigrew Kenny | Spiro, OK 74959 | Gas Operator | Dec 2025 |
| 4557 | Pettit Charles Oil Company | Okmulgee, OK 74447-4226 | Oil & Gas Operator | Sep 2018 |
| 4558 | Pharoah Bob | Maysville, OK 73057 | Oil & Gas Operator | Jul 1994 |
| 4559 | Phase III Drilling Inc | Wetumka, OK 74883-0333 | Oil & Gas Operator | Dec 2025 |
| 4560 | PHD Oil & Gas Inc | Rush Springs, OK 73082-0218 | Oil & Gas Operator | May 2021 |
| 4561 | Pheldon Oil Production Inc | Asher, OK 74826-2629 | Oil & Gas Operator | Nov 2025 |
| 4562 | Philco Energy Inc | Lamesa, TX 79331 | Oil & Gas Operator | Mar 2015 |
| 4563 | Philcon Development Co. | Amarillo, TX 79101 | Oil & Gas Operator | Sep 2014 |
| 4564 | Phillips Jr N J | Seminole, OK 74868-2828 | Oil Operator | Jul 1998 |
| 4565 | Phillips Oil Operating Co | Enid, OK 73703-4921 | Oil & Gas Operator | May 2019 |
| 4566 | Phillips Operating Co. | Mineral Wells, TX 76067 | Oil & Gas Operator | Jan 2013 |
| 4567 | Phillips, Warren P | | Oil & Gas Operator | Apr 2011 |
| 4568 | Philpot Operating Company Inc | Ada, OK 74820-4457 | Oil & Gas Operator | May 2013 |
| 4569 | Phoenix Energy Partners LLC | Marlow, OK 73055 | Oil Operator | Dec 2025 |
| 4570 | Phoenix Hydrocarbons Operating Co | Midland, TX 79702-3638 | Oil & Gas Operator | Jul 2018 |
| 4571 | Phoenix LTD | Charlotte, NC 28231-1547 | Oil Operator | Sep 2001 |
| 4572 | Phoenix Midstream LLC | Houston, TX 77042 | Oil Operator | Aug 2022 |
| 4573 | Phoenix Oil & Gas Inc | Seminole, OK 74868 | Oil & Gas Operator | May 2025 |
| 4574 | Phoenix Operating Company, Inc. | Shreveport, LA 71161 | Oil & Gas Operator | Mar 2015 |
| 4575 | Phoenix Petrocorp, Inc. | McKinney, TX 75070 | Oil & Gas Operator | Jan 2026 |
| 4576 | Phoenix Production Inc | Burneyville, OK 73430-2158 | Oil & Gas Operator | Feb 2025 |
| 4577 | Pic Inc | Ponca City, OK 74602 | Oil & Gas Operator | Jan 2013 |
| 4578 | Pices Energy Production Co. | Alva, OK 73717-9512 | Oil & Gas Operator | Apr 2014 |
| 4579 | Pickelsimer Kenny | Wilson, OK 73463-6502 | Oil & Gas Operator | Aug 2014 |
| 4580 | Pierce G R Oil Properties Inc | Oklahoma City, OK 73106 | Oil Operator | Feb 1999 |
| 4581 | Pierce Investments | Weatherford, OK 73096 | Oil Operator | Jul 1994 |
| 4582 | Pierce L H | Healdton, OK 73438-9530 | Oil Operator | Jan 1996 |
| 4583 | Pierce O M Operations | Duncan, OK 73533 | Oil & Gas Operator | Nov 1998 |
| 4584 | Pierce Oil Company | Skiatook, OK 74070 | Oil & Gas Operator | Nov 2017 |
| 4585 | Pierce Patsey R The Estate Of | Duncan, OK 73533-4900 | Oil Operator | Mar 2007 |
| 4586 | Pierco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Mar 2026 |
| 4587 | Pierson Max S | Bartlesville, OK 74003-5909 | Oil Operator | Sep 2020 |
| 4588 | Pike Oil & Gas Inc | Pittsfield, IL 62363 | Oil & Gas Operator | Oct 2020 |
| 4589 | Pilgrim & Smith Inc | Tulsa, OK 74152 | Oil & Gas Operator | Apr 2015 |
| 4590 | Pillers Chris | Skiatook, OK 74070-1811 | Oil Operator | Dec 2025 |
| 4591 | Pilot Exploration Company | Okmulgee, OK 74447 | Oil & Gas Operator | Jan 2011 |
| 4592 | Pinkston Robert L | Beggs, OK 74421 | Oil Operator | Dec 2025 |
| 4593 | Pinnacle Corporation (The) | Broken Arrow, OK 74012 | Oil & Gas Operator | Nov 2014 |
| 4594 | Pinnacle Exploration & Production Co | Kiefer, OK 74041 | Oil & Gas Operator | Dec 2025 |
| 4595 | Pinnacle Exploration Inc | Edmond, OK 73003 | Oil & Gas Operator | Mar 2024 |
| 4596 | Pinnacle Operating Company LLC | Tulsa, OK 74137 | Oil & Gas Operator | Dec 2025 |
| 4597 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Mar 2026 |
| 4598 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Jan 2026 |
| 4599 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Mar 2026 |
| 4600 | Pioneer Of Oklahoma LP | Houston, TX 77090-3655 | Oil & Gas Operator | Dec 2025 |