| 3501 | Petroleum Venture Capitol Corp | | Oil Operator | Jun 1980 |
| 3502 | Petromark Resources Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 3503 | Petrominerals Corp. | | Oil & Gas Operator | Dec 2003 |
| 3504 | Petroquest Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2001 |
| 3505 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2026 |
| 3506 | Petroquest Exploration, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 2008 |
| 3507 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Sep 2026 |
| 3508 | Petrosearch Operating Co, LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2026 |
| 3509 | Petrosearch, Inc. | | Oil Operator | Jul 1992 |
| 3510 | Petrosil Resources Inc. | | Oil & Gas Operator | Oct 1981 |
| 3511 | Petrotex Engineering Company | Cypress, TX 77429 | Oil & Gas Operator | Sep 2026 |
| 3512 | Petrotex Louisiana Company | | Oil & Gas Operator | Aug 1998 |
| 3513 | Petrus Oil Company, L.P. | | Oil & Gas Operator | Dec 1989 |
| 3514 | Petrus Operating Co., Inc. | | Oil & Gas Operator | Dec 1986 |
| 3515 | Petsec Energy Inc. | | Oil & Gas Operator | Sep 2012 |
| 3516 | PF Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Aug 2003 |
| 3517 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 3518 | PG&E Resources Offshore Company | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 3519 | Phalanx Petroleum LLC | | Oil & Gas Operator | Jan 2025 |
| 3520 | Pharaoh & Associates, Inc. | Houston, TX 77252 | Oil & Gas Operator | Aug 2002 |
| 3521 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2026 |
| 3522 | Pharaoh Oil, LLC | | Oil Operator | Jan 2025 |
| 3523 | Philip B. Berry Oper Co., Inc. | | Oil & Gas Operator | Jun 1990 |
| 3524 | Philip Services/Louisiana Inc. | | Oil Operator | Dec 2000 |
| 3525 | Phillberg Oil Company | | Oil Operator | Mar 2014 |
| 3526 | Phillip A Guzzino | | Oil Operator | Jan 2000 |
| 3527 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 3528 | Phillips Lake Corp. | | Oil Operator | Dec 1985 |
| 3529 | Phillips Oil Company | Casper, WY 82602 | Oil & Gas Operator | Sep 1986 |
| 3530 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 3531 | Phoenic Opr Co Inc-SPD | | Oil Operator | Feb 1993 |
| 3532 | Phoenix - Comco, Inc. | | Oil Operator | Aug 2004 |
| 3533 | Phoenix Drilling & Exploration | | Oil & Gas Operator | Jun 1982 |
| 3534 | Phoenix Energy, Inc. | Oilmont, MT 59466 | Oil & Gas Operator | Jun 2026 |
| 3535 | Phoenix Exploration Company LP | | Oil & Gas Operator | Sep 2011 |
| 3536 | Phoenix Oil & Gas LTD., L.L.P. | Houston, TX 77010 | Oil & Gas Operator | Jun 2004 |
| 3537 | Phoenix Oper Co Inc-New Amer | | Oil Operator | Jul 1994 |
| 3538 | Phoenix Operating Co. Of Texas | | Oil Operator | Jul 1995 |
| 3539 | Phoenix Operating Company, Inc. | Shreveport, LA 71161 | Oil & Gas Operator | Mar 2015 |
| 3540 | Phoenix Opr Co Inc - West End | | Oil Operator | Dec 1992 |
| 3541 | Phoenix Opr Co Inc-Acc | | Oil Operator | Dec 1992 |
| 3542 | Phoenix Opr Co Inc-Amsterdam | | Oil Operator | Nov 1994 |
| 3543 | Phoenix Opr Co Inc-Broadway | | Oil Operator | Dec 1992 |
| 3544 | Phoenix Opr Co Inc-Caddo | | Oil Operator | Dec 1992 |
| 3545 | Phoenix Opr Co Inc-DS DRLG | | Oil Operator | May 1994 |
| 3546 | Phoenix Opr Co Inc-HGC 1985 | | Oil Operator | Dec 1992 |
| 3547 | Phoenix Opr Co Inc-La Petro As | | Oil Operator | Dec 1992 |
| 3548 | Phoenix Opr Co Inc-Lex 83 | | Oil Operator | Feb 1993 |
| 3549 | Phoenix Opr Co Inc-Nac | | Oil Operator | Dec 1992 |
| 3550 | Phoenix Opr Co Inc-New Amer 85 | | Oil Operator | Dec 1992 |
| 3551 | Phoenix Opr Co Inc-Northern La | | Oil Operator | Dec 1992 |
| 3552 | Phoenix Opr Co Inc-Oc Yacht 85 | | Oil Operator | Dec 1992 |
| 3553 | Phoenix Opr Co Inc-Oc Yacht II | | Oil Operator | Dec 1992 |
| 3554 | Phoenix Opr Co Inc-Ocean Yacht | | Oil Operator | Dec 1992 |
| 3555 | Phoenix Opr Co Inc-Petrovest | | Oil Operator | Dec 1992 |
| 3556 | Phoenix Opr Co Inc-PML | | Oil Operator | Dec 1992 |
| 3557 | Phoenix Opr Co Inc-RBF 1985 | | Oil Operator | Dec 1992 |
| 3558 | Phoenix Opr Co Inc-Rvside '85 | | Oil Operator | Dec 1992 |
| 3559 | Phoenix Opr Co Inc-Salem 1985 | | Oil Operator | Dec 1992 |
| 3560 | Phoenix Opr Co Inc-Shemen | | Oil Operator | Dec 1992 |
| 3561 | Phoenix Opr Co Inc-TG I | | Oil Operator | Dec 1992 |
| 3562 | Phoenix Opr Co Inc-TG II | | Oil Operator | Dec 1992 |
| 3563 | Phoenix Opr Co Inc-Vista | | Oil Operator | Dec 1992 |
| 3564 | Phoenix Opr Co Inc-York | | Oil Operator | Dec 1992 |
| 3565 | Phoenix Resources Co | | Oil & Gas Operator | Jun 1984 |
| 3566 | Phoenix-Vi-Roi | | Oil & Gas Operator | Mar 1986 |
| 3567 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 3568 | Pie La Operating, LLC | | Oil & Gas Operator | Jan 2025 |
| 3569 | Pierce Production Company | Eunice, NM 88231 | Oil & Gas Operator | Oct 2012 |
| 3570 | Pilot Resources, Inc. | | Oil & Gas Operator | May 2013 |
| 3571 | Pine Island Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 3572 | Pine Island Production LLC | | Oil Operator | Jan 2025 |
| 3573 | Pine Pipeline, Inc. | | Oil Operator | Dec 1998 |
| 3574 | Pine Prairie Oil Co., Inc. | | Oil & Gas Operator | Nov 1983 |
| 3575 | Pine Wave Energy Partners Operating, LLC | | Gas Operator | Apr 2022 |
| 3576 | Pinnacle Energy, LLC | | Oil & Gas Operator | Jan 2025 |
| 3577 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Sep 2026 |
| 3578 | Pintail Minerals Corp. | | Gas Operator | Jun 1992 |
| 3579 | Pintail Oil & Gas, LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 3580 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Jul 2026 |
| 3581 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Jul 2026 |
| 3582 | Pioneer Exploration, LTD. | Houston, TX 77090 | Oil & Gas Operator | Sep 2008 |
| 3583 | Pioneer Natural Res. (GPC), Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 1998 |
| 3584 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | May 2026 |
| 3585 | Pioneer Prod. Corp. | | Oil & Gas Operator | Jun 1986 |
| 3586 | Pioneer Production Corp-Huggs | | Oil & Gas Operator | Jun 1986 |
| 3587 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 3588 | Pita Oil And Gas LLC | | Oil Operator | Jul 2004 |
| 3589 | Pittencrieff (Gulf Coast), Inc. | Abilene, TX 79608 | Oil & Gas Operator | Sep 1998 |
| 3590 | Pittencrieff America Inc | Abilene, TX 79608 | Oil & Gas Operator | Feb 2003 |
| 3591 | Pitts Oil Co-Dallas Prod Inc | | Oil & Gas Operator | Jun 1991 |
| 3592 | Placid Oil Co., Et Al | | Oil & Gas Operator | Jun 1983 |
| 3593 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 3594 | Plains Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2008 |
| 3595 | Planet Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 3596 | Planet Resource Operating, LLC | | Oil & Gas Operator | Nov 2024 |
| 3597 | Plano Corp. | | Oil & Gas Operator | Mar 2005 |
| 3598 | Plantation Oil Company | | Oil Operator | Dec 2006 |
| 3599 | Plantation Operating, LLC | Houston, TX 77041 | Oil & Gas Operator | Nov 2011 |
| 3600 | Platt Oil Production | | Oil & Gas Operator | Jan 2007 |