| 3501 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 3502 | Pentagon Petroleum, Inc. | | Oil & Gas Operator | Sep 1991 |
| 3503 | Penton And Penton | | Oil & Gas Operator | Jan 1983 |
| 3504 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 3505 | Perdido Energy Louisiana, LLC | | Oil & Gas Operator | Dec 2024 |
| 3506 | Perdura Energy L.L.C. | | Oil & Gas Operator | Apr 2018 |
| 3507 | Perdure Petroleum LLC | Allen, TX 75013 | Oil & Gas Operator | Oct 2021 |
| 3508 | Perenco LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2005 |
| 3509 | Perkins Oil Properties | | Oil & Gas Operator | Nov 2024 |
| 3510 | Permeator Corp. | | Oil Operator | Sep 1990 |
| 3511 | Perna Oil & Gas LLC | | Oil & Gas Operator | Nov 2024 |
| 3512 | Perry Point, Inc. | | Oil Operator | Mar 2022 |
| 3513 | Pesco | | Oil & Gas Operator | Oct 1984 |
| 3514 | Pete Caldwell Drilling Co.,Inc | | Oil & Gas Operator | Aug 1991 |
| 3515 | Peter W. Herbst | | Gas Operator | Mar 1998 |
| 3516 | Peterman-Sturlese Et Al | | Oil & Gas Operator | Sep 1987 |
| 3517 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2025 |
| 3518 | Petro "E", LLC | | Oil & Gas Operator | Feb 2010 |
| 3519 | Petro Energy Inc | Farmington, NM 87499 | Oil & Gas Operator | Dec 2024 |
| 3520 | Petro Harvester Operating Company, LLC | | Oil & Gas Operator | Nov 2022 |
| 3521 | Petro Ventures Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2019 |
| 3522 | Petro Vest, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2014 |
| 3523 | Petro-Assets Corporation | | Oil & Gas Operator | Feb 2000 |
| 3524 | Petro-Chem Operating Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Apr 2025 |
| 3525 | Petro-Guard Company, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2014 |
| 3526 | Petro-Guard Production,L.L.C. | Houston, TX 77063 | Oil & Gas Operator | Dec 2024 |
| 3527 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 3528 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2025 |
| 3529 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 3530 | Petro-Management Inc | | Oil Operator | Dec 1998 |
| 3531 | Petro-Ventures, Inc. - Miss. | | Oil & Gas Operator | Apr 2009 |
| 3532 | Petrocan, Inc. | | Oil & Gas Operator | Apr 1998 |
| 3533 | Petrocana,Inc. | | Oil & Gas Operator | Aug 1993 |
| 3534 | Petrocorp | | Oil & Gas Operator | Nov 1992 |
| 3535 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 3536 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Dec 2024 |
| 3537 | Petrofunds, Inc & Sunny South | | Oil & Gas Operator | Feb 1984 |
| 3538 | Petrofunds, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 1996 |
| 3539 | Petrofunds, Inc. & Herd | | Oil & Gas Operator | Mar 1984 |
| 3540 | Petroglen Company, Inc. | | Oil & Gas Operator | Jul 1990 |
| 3541 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 3542 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 3543 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 3544 | Petrol Industries, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Jun 2012 |
| 3545 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Apr 2025 |
| 3546 | Petroleum Corp Of Delaware The | | Oil & Gas Operator | May 1991 |
| 3547 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 3548 | Petroleum Engineers, Inc. | | Oil & Gas Operator | Jun 1983 |
| 3549 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 3550 | Petroleum Futures-Chapman Oil | | Oil & Gas Operator | Jul 1981 |
| 3551 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 3552 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 3553 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Apr 2025 |
| 3554 | Petroleum Properties MGMT Corp | | Oil & Gas Operator | Aug 1990 |
| 3555 | Petroleum Recovery & Expl Inc. | | Oil Operator | Oct 1984 |
| 3556 | Petroleum Resource MGMT Co TX | | Oil & Gas Operator | Sep 2020 |
| 3557 | Petroleum Resources MGMT Corp. | | Oil & Gas Operator | Mar 2002 |
| 3558 | Petroleum Venture Capitol Corp | | Oil Operator | Jun 1980 |
| 3559 | Petromark Resources Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 3560 | Petrominerals Corp. | | Oil & Gas Operator | Dec 2003 |
| 3561 | Petroquest Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2001 |
| 3562 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Apr 2025 |
| 3563 | Petroquest Exploration, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 2008 |
| 3564 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Apr 2025 |
| 3565 | Petrosearch Operating Co, LLC | Denver, CO 80202 | Oil & Gas Operator | Apr 2025 |
| 3566 | Petrosearch, Inc. | | Oil Operator | Jul 1992 |
| 3567 | Petrosil Resources Inc. | | Oil & Gas Operator | Oct 1981 |
| 3568 | Petrotex Engineering Company | Cypress, TX 77429 | Oil & Gas Operator | Apr 2025 |
| 3569 | Petrotex Louisiana Company | | Oil & Gas Operator | Aug 1998 |
| 3570 | Petrus Oil Company., L.P. | | Oil & Gas Operator | Dec 1989 |
| 3571 | Petrus Operating Co., Inc. | | Oil & Gas Operator | Dec 1986 |
| 3572 | Petsec Energy Inc. | | Oil & Gas Operator | Sep 2012 |
| 3573 | PF Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Aug 2003 |
| 3574 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 3575 | PG&E Resources Offshore Company | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 3576 | Phalanx Petroleum LLC | | Oil & Gas Operator | Jan 2025 |
| 3577 | Pharaoh & Associates, Inc. | Houston, TX 77252 | Oil & Gas Operator | Aug 2002 |
| 3578 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2025 |
| 3579 | Pharaoh Oil, LLC | | Oil Operator | Jan 2025 |
| 3580 | Philip B. Berry Oper Co., Inc. | | Oil & Gas Operator | Jun 1990 |
| 3581 | Philip Services/Louisiana Inc. | | Oil Operator | Dec 2000 |
| 3582 | Phillberg Oil Company | | Oil Operator | Mar 2014 |
| 3583 | Phillip A Guzzino | | Oil Operator | Jan 2000 |
| 3584 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 3585 | Phillips Lake Corp. | | Oil Operator | Dec 1985 |
| 3586 | Phillips Oil Company | Casper, WY 82602 | Oil & Gas Operator | Sep 1986 |
| 3587 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 3588 | Phoenic Opr Co Inc-SPD | | Oil Operator | Feb 1993 |
| 3589 | Phoenix - Comco, Inc. | | Oil Operator | Aug 2004 |
| 3590 | Phoenix Drilling & Exploration | | Oil & Gas Operator | Jun 1982 |
| 3591 | Phoenix Energy, Inc. | Oilmont, MT 59466 | Oil & Gas Operator | Jan 2025 |
| 3592 | Phoenix Exploration Company LP | | Oil & Gas Operator | Sep 2011 |
| 3593 | Phoenix Oil & Gas LTD., L.L.P. | Houston, TX 77010 | Oil & Gas Operator | Jun 2004 |
| 3594 | Phoenix Oper Co Inc-New Amer | | Oil Operator | Jul 1994 |
| 3595 | Phoenix Operating Co. Of Texas | | Oil Operator | Jul 1995 |
| 3596 | Phoenix Operating Company, Inc. | Shreveport, LA 71161 | Oil & Gas Operator | Mar 2015 |
| 3597 | Phoenix Opr Co Inc - West End | | Oil Operator | Dec 1992 |
| 3598 | Phoenix Opr Co Inc-Acc | | Oil Operator | Dec 1992 |
| 3599 | Phoenix Opr Co Inc-Amsterdam | | Oil Operator | Nov 1994 |
| 3600 | Phoenix Opr Co Inc-Broadway | | Oil Operator | Dec 1992 |