| 8501 | Petroleum International, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2000 |
| 8502 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 8503 | Petroleum Land Company | Abilene, TX 79606 | Oil & Gas Operator | May 2000 |
| 8504 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 8505 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Dec 2025 |
| 8506 | Petroleum Production Engineering | Fulton, TX 78358 | Oil Operator | Feb 2019 |
| 8507 | Petroleum Production MGMT., Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Dec 2025 |
| 8508 | Petroleum Properties MGMT Co LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2005 |
| 8509 | Petroleum Properties MGMT. Co. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2014 |
| 8510 | Petroleum Property MGMT, Inc (A) | Fort Worth, TX 76101 | Oil & Gas Operator | May 1994 |
| 8511 | Petroleum Recovery Systems, L.C. | Houston, TX 77024 | Oil Operator | Dec 2025 |
| 8512 | Petroleum Reserve Corporation | Plymouth MTNG, PA 19462 | Oil & Gas Operator | May 2008 |
| 8513 | Petroleum Resource Management Co | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 8514 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 8515 | Petroleum Well Service LLC | Silsbee, TX 77656 | Oil Operator | Dec 2025 |
| 8516 | Petrolia Energy Corporation | Pearland, TX 77581 | Oil Operator | Jan 2024 |
| 8517 | Petrolia Group, L.L.C. | Katy, TX 77449 | Oil & Gas Operator | Dec 2025 |
| 8518 | Petromac, Inc. | Onalaska, TX 77360 | Oil & Gas Operator | Dec 2025 |
| 8519 | Petromark Energy LLC | Oklahoma City, OK 73116-7634 | Oil & Gas Operator | Jun 2000 |
| 8520 | Petromining, Inc. | Plano, TX 75026 | Oil & Gas Operator | Dec 2025 |
| 8521 | Petron Energy Inc | Dallas, TX 75252 | Oil & Gas Operator | Dec 2025 |
| 8522 | Petron Oil Company | Missouri City, TX 77489 | Oil & Gas Operator | Dec 2025 |
| 8523 | Petroneal Corporation | San Angelo, TX 76902 | Oil & Gas Operator | Nov 1995 |
| 8524 | Petronomics Petroleum, Inc. | Austin, TX 78734 | Oil & Gas Operator | Jan 1995 |
| 8525 | Petronomics, Inc. | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 8526 | Petroplex Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 8527 | Petroplex Equipment, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2019 |
| 8528 | Petropoint Energy Operating, LLC | Houston, TX 77098 | Oil & Gas Operator | Dec 2025 |
| 8529 | Petropro Energy Partners, L.P. | Houston, TX 77024 | Oil & Gas Operator | Jan 2013 |
| 8530 | Petroquest Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2001 |
| 8531 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Dec 2025 |
| 8532 | Petroquest Exploration, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 2008 |
| 8533 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Dec 2025 |
| 8534 | Petrosaurus, Inc. | Somerset, TX 78069 | Oil Operator | Dec 2025 |
| 8535 | Petrosearch Operating Co, LLC | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 8536 | Petrosource Energy Corporation | Fort Worth, TX 76112 | Oil & Gas Operator | Dec 2025 |
| 8537 | Petrosource Production Co. L.P. | Midland, TX 79701 | Oil & Gas Operator | Nov 2007 |
| 8538 | Petrosource Production Co., LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 8539 | Petrotex Engineering Company | Cypress, TX 77429 | Oil & Gas Operator | Dec 2025 |
| 8540 | Petrotex, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 8541 | Petrotx Operating, LLC | Kingwood, TX 77339 | Oil & Gas Operator | Dec 2025 |
| 8542 | Petrovybe Opco LLC | Plano, TX 75093 | Oil & Gas Operator | Dec 2025 |
| 8543 | Petrox Resources Inc | Meeker, CO 81641 | Oil & Gas Operator | Oct 2025 |
| 8544 | Petx Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 8545 | PF Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Aug 2003 |
| 8546 | Pfed Operating | Keller, TX 76248 | Oil Operator | Dec 2025 |
| 8547 | Pfog Operations, LLC | Midland, TX 79710 | Oil Operator | Dec 2025 |
| 8548 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 8549 | PG&E Resources Offshore Company | Dallas, TX 75206 | Oil & Gas Operator | Oct 1994 |
| 8550 | PG-M International Operating,LLC | Borger, TX 79008 | Oil & Gas Operator | Dec 2025 |
| 8551 | Pgi Operating, LLC | Sweetwater, TX 79556 | Oil Operator | Dec 2025 |
| 8552 | Pgo, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 1999 |
| 8553 | PH Exploration, Inc. | Houston, TX 77008 | Oil & Gas Operator | Nov 2001 |
| 8554 | Pharaoh & Associates, Inc. | Houston, TX 77252 | Oil & Gas Operator | Aug 2002 |
| 8555 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Dec 2025 |
| 8556 | Pheffer Oil, L.L.C. | Laredo, TX 78041 | Oil Operator | Jul 2021 |
| 8557 | Phere Operating Inc | Spring Branch, TX 78070 | Oil & Gas Operator | Dec 2025 |
| 8558 | Philcon Development Co. | Amarillo, TX 79101 | Oil & Gas Operator | Sep 2014 |
| 8559 | Phillips & Pierson | Olney, TX 76374 | Oil & Gas Operator | Nov 1995 |
| 8560 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 8561 | Phillips Operating Co. | Mineral Wells, TX 76067 | Oil & Gas Operator | Jan 2013 |
| 8562 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 8563 | Phillips, B. F. Jr., Estate Of | Dallas, TX 75201 | Oil & Gas Operator | Mar 2011 |
| 8564 | Phillips, Bob | Weatherford, TX 76086 | Oil & Gas Operator | Nov 2019 |
| 8565 | Phillips, Jack L. | Gladewater, TX 75647 | Oil & Gas Operator | Dec 1997 |
| 8566 | Phillips, Jack L. Co. | Gladewater, TX 75647 | Oil & Gas Operator | Dec 2025 |
| 8567 | Phillips, Ken | San Angelo, TX 76904 | Oil & Gas Operator | Jun 2021 |
| 8568 | Philmar | Houston, TX 77269 | Oil Operator | Dec 2025 |
| 8569 | Philpott Oil & Gas Co Inc | Atwood, KS 67730 | Oil Operator | Aug 2010 |
| 8570 | Phoenix Crude Oil Company | Westbrook, TX 79565 | Oil Operator | Oct 2004 |
| 8571 | Phoenix Fund, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2000 |
| 8572 | Phoenix Hydrocarbons Operating | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 8573 | Phoenix Oil & Gas | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 8574 | Phoenix Oil & Gas LTD., L.L.P. | Houston, TX 77010 | Oil & Gas Operator | Jun 2004 |
| 8575 | Phoenix Oil & Gas, Inc. (A) | Canada, 00100 | Oil & Gas Operator | Oct 2005 |
| 8576 | Phoenix Operating Company Of TX. | Dallas, TX 75206 | Oil & Gas Operator | Jun 1995 |
| 8577 | Phoenix Operating Company, Inc. | Shreveport, LA 71161 | Oil & Gas Operator | Mar 2015 |
| 8578 | Phoenix Petrocorp, Inc. | McKinney, TX 75070 | Oil & Gas Operator | Sep 2025 |
| 8579 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 8580 | Phylko Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 8581 | Pi Energy, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2025 |
| 8582 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 8583 | Pickett Oil Co. | Gonzales, TX 78629 | Oil & Gas Operator | Oct 2019 |
| 8584 | Pickett, D. W. | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Sep 2004 |
| 8585 | Picosa, L.L.C. | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Dec 2025 |
| 8586 | Pie Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2025 |
| 8587 | Piedra Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
| 8588 | Pierce Junction Petroleum Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2010 |
| 8589 | Pierce Operating Company, L.L.C. | Bryan, TX 77808 | Oil & Gas Operator | Dec 2018 |
| 8590 | Pierce Production Company | Eunice, NM 88231 | Oil & Gas Operator | Oct 2012 |
| 8591 | Pierce Production Company, LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 8592 | Pierce, Ray A. | Eunice, NM 88231 | Oil & Gas Operator | Nov 2004 |
| 8593 | Pierco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2025 |
| 8594 | Pierre Petroleum Corp. | Borger, TX 79007 | Oil & Gas Operator | Feb 1997 |
| 8595 | Pikeco Inc | Whitesboro, TX 76273 | Oil & Gas Operator | Nov 2001 |
| 8596 | Pilgrim Energy Partners L.L.C. | Fairfield, IL 62837 | Oil Operator | Dec 2025 |
| 8597 | Pillans, Benjamin P. | Abilene, TX 79605 | Gas Operator | Aug 2012 |
| 8598 | Pillar Efs, LLC | Dallas, TX 75204 | Oil & Gas Operator | Dec 2025 |
| 8599 | Pillar Energy, LLC | Charleston, WV 25312-5987 | Oil & Gas Operator | Dec 2024 |
| 8600 | Pillows, Burl A. | Houston, TX 77062 | Oil & Gas Operator | Dec 2025 |