| 3501 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 3502 | Petro-Management Inc | | Oil Operator | Dec 1998 |
| 3503 | Petro-Ventures, Inc. - Miss. | | Oil & Gas Operator | Apr 2009 |
| 3504 | Petrocan, Inc. | | Oil & Gas Operator | Apr 1998 |
| 3505 | Petrocana,Inc. | | Oil & Gas Operator | Aug 1993 |
| 3506 | Petrocorp | | Oil & Gas Operator | Nov 1992 |
| 3507 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 3508 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | May 2025 |
| 3509 | Petrofunds, Inc & Sunny South | | Oil & Gas Operator | Feb 1984 |
| 3510 | Petrofunds, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jun 1996 |
| 3511 | Petrofunds, Inc. & Herd | | Oil & Gas Operator | Mar 1984 |
| 3512 | Petroglen Company, Inc. | | Oil & Gas Operator | Jul 1990 |
| 3513 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 3514 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 3515 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 3516 | Petrol Industries, Inc. | Shreveport, LA 71137 | Oil & Gas Operator | Jun 2012 |
| 3517 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Sep 2025 |
| 3518 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 3519 | Petroleum Engineers, Inc. | | Oil & Gas Operator | Jun 1983 |
| 3520 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 3521 | Petroleum Futures-Chapman Oil | | Oil & Gas Operator | Jul 1981 |
| 3522 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 3523 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 3524 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Sep 2025 |
| 3525 | Petroleum Properties MGMT Corp | | Oil & Gas Operator | Aug 1990 |
| 3526 | Petroleum Recovery & Expl Inc. | | Oil Operator | Oct 1984 |
| 3527 | Petroleum Resource MGMT Co TX | | Oil & Gas Operator | Sep 2020 |
| 3528 | Petroleum Resources MGMT Corp. | | Oil & Gas Operator | Mar 2002 |
| 3529 | Petroleum Venture Capitol Corp | | Oil Operator | Jun 1980 |
| 3530 | Petromark Resources Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1993 |
| 3531 | Petrominerals Corp. | | Oil & Gas Operator | Dec 2003 |
| 3532 | Petroquest Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2001 |
| 3533 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Sep 2025 |
| 3534 | Petroquest Exploration, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 2008 |
| 3535 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Sep 2025 |
| 3536 | Petrosearch Operating Co, LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 3537 | Petrosearch, Inc. | | Oil Operator | Jul 1992 |
| 3538 | Petrosil Resources Inc. | | Oil & Gas Operator | Oct 1981 |
| 3539 | Petrotex Engineering Company | Cypress, TX 77429 | Oil & Gas Operator | Sep 2025 |
| 3540 | Petrotex Louisiana Company | | Oil & Gas Operator | Aug 1998 |
| 3541 | Petrus Oil Company., L.P. | | Oil & Gas Operator | Dec 1989 |
| 3542 | Petrus Operating Co., Inc. | | Oil & Gas Operator | Dec 1986 |
| 3543 | Petsec Energy Inc. | | Oil & Gas Operator | Sep 2012 |
| 3544 | PF Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Aug 2003 |
| 3545 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 3546 | PG&E Resources Offshore Company | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 3547 | Phalanx Petroleum LLC | | Oil & Gas Operator | Jan 2025 |
| 3548 | Pharaoh & Associates, Inc. | Houston, TX 77252 | Oil & Gas Operator | Aug 2002 |
| 3549 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2025 |
| 3550 | Pharaoh Oil, LLC | | Oil Operator | Jan 2025 |
| 3551 | Philip B. Berry Oper Co., Inc. | | Oil & Gas Operator | Jun 1990 |
| 3552 | Philip Services/Louisiana Inc. | | Oil Operator | Dec 2000 |
| 3553 | Phillberg Oil Company | | Oil Operator | Mar 2014 |
| 3554 | Phillip A Guzzino | | Oil Operator | Jan 2000 |
| 3555 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 3556 | Phillips Lake Corp. | | Oil Operator | Dec 1985 |
| 3557 | Phillips Oil Company | Casper, WY 82602 | Oil & Gas Operator | Sep 1986 |
| 3558 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 3559 | Phoenic Opr Co Inc-SPD | | Oil Operator | Feb 1993 |
| 3560 | Phoenix - Comco, Inc. | | Oil Operator | Aug 2004 |
| 3561 | Phoenix Drilling & Exploration | | Oil & Gas Operator | Jun 1982 |
| 3562 | Phoenix Energy, Inc. | Oilmont, MT 59466 | Oil & Gas Operator | May 2025 |
| 3563 | Phoenix Exploration Company LP | | Oil & Gas Operator | Sep 2011 |
| 3564 | Phoenix Oil & Gas LTD., L.L.P. | Houston, TX 77010 | Oil & Gas Operator | Jun 2004 |
| 3565 | Phoenix Oper Co Inc-New Amer | | Oil Operator | Jul 1994 |
| 3566 | Phoenix Operating Co. Of Texas | | Oil Operator | Jul 1995 |
| 3567 | Phoenix Operating Company, Inc. | Shreveport, LA 71161 | Oil & Gas Operator | Mar 2015 |
| 3568 | Phoenix Opr Co Inc - West End | | Oil Operator | Dec 1992 |
| 3569 | Phoenix Opr Co Inc-Acc | | Oil Operator | Dec 1992 |
| 3570 | Phoenix Opr Co Inc-Amsterdam | | Oil Operator | Nov 1994 |
| 3571 | Phoenix Opr Co Inc-Broadway | | Oil Operator | Dec 1992 |
| 3572 | Phoenix Opr Co Inc-Caddo | | Oil Operator | Dec 1992 |
| 3573 | Phoenix Opr Co Inc-DS DRLG | | Oil Operator | May 1994 |
| 3574 | Phoenix Opr Co Inc-HGC 1985 | | Oil Operator | Dec 1992 |
| 3575 | Phoenix Opr Co Inc-La Petro As | | Oil Operator | Dec 1992 |
| 3576 | Phoenix Opr Co Inc-Lex 83 | | Oil Operator | Feb 1993 |
| 3577 | Phoenix Opr Co Inc-Nac | | Oil Operator | Dec 1992 |
| 3578 | Phoenix Opr Co Inc-New Amer 85 | | Oil Operator | Dec 1992 |
| 3579 | Phoenix Opr Co Inc-Northern La | | Oil Operator | Dec 1992 |
| 3580 | Phoenix Opr Co Inc-Oc Yacht 85 | | Oil Operator | Dec 1992 |
| 3581 | Phoenix Opr Co Inc-Oc Yacht II | | Oil Operator | Dec 1992 |
| 3582 | Phoenix Opr Co Inc-Ocean Yacht | | Oil Operator | Dec 1992 |
| 3583 | Phoenix Opr Co Inc-Petrovest | | Oil Operator | Dec 1992 |
| 3584 | Phoenix Opr Co Inc-PML | | Oil Operator | Dec 1992 |
| 3585 | Phoenix Opr Co Inc-RBF 1985 | | Oil Operator | Dec 1992 |
| 3586 | Phoenix Opr Co Inc-Rvside '85 | | Oil Operator | Dec 1992 |
| 3587 | Phoenix Opr Co Inc-Salem 1985 | | Oil Operator | Dec 1992 |
| 3588 | Phoenix Opr Co Inc-Shemen | | Oil Operator | Dec 1992 |
| 3589 | Phoenix Opr Co Inc-TG I | | Oil Operator | Dec 1992 |
| 3590 | Phoenix Opr Co Inc-TG II | | Oil Operator | Dec 1992 |
| 3591 | Phoenix Opr Co Inc-Vista | | Oil Operator | Dec 1992 |
| 3592 | Phoenix Opr Co Inc-York | | Oil Operator | Dec 1992 |
| 3593 | Phoenix-Vi-Roi | | Oil & Gas Operator | Mar 1986 |
| 3594 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 3595 | Pie La Operating, LLC | | Oil & Gas Operator | Jan 2025 |
| 3596 | Pierce Production Company | Eunice, NM 88231 | Oil & Gas Operator | Oct 2012 |
| 3597 | Pilot Resources, Inc. | | Oil & Gas Operator | May 2013 |
| 3598 | Pine Island Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Sep 2025 |
| 3599 | Pine Island Production LLC | | Oil Operator | Jan 2025 |
| 3600 | Pine Pipeline, Inc. | | Oil Operator | Dec 1998 |