| 1 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Mar 2025 |
| 2 | Pegasi Energy Resources Corp | Tyler, TX 75710 | Oil & Gas Operator | Jul 2007 |
| 3 | Pegasi Operating Inc. | Jefferson, TX 75657 | Oil & Gas Operator | Mar 2025 |
| 4 | Pegasus P And A LLC | Kilgore, TX 75663 | Oil Operator | Mar 2025 |
| 5 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 6 | Performance Operating Partners, LLC | Shreveport, LA 71164 | Oil & Gas Operator | Mar 2025 |
| 7 | Person, J.S., Inc. | Longview, TX 75606 | Oil & Gas Operator | Mar 2025 |
| 8 | Petro-Chem Operating Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Mar 2025 |
| 9 | Petroquest Exploration, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 2008 |
| 10 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Mar 2025 |
| 11 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 12 | Phillips, Jack L. | Gladewater, TX 75647 | Oil & Gas Operator | Dec 1997 |
| 13 | Phillips, Jack L. Co. | Gladewater, TX 75647 | Oil & Gas Operator | Mar 2025 |
| 14 | Pine Island Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Mar 2025 |
| 15 | Plains Marketing LP | Cushing, OK 74023 | Oil & Gas Operator | Dec 2022 |
| 16 | Prime Natural Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 2007 |
| 17 | Prime Operating | Queen City, TX 75572 | Oil & Gas Operator | Apr 2005 |
| 18 | Princess Three Corporation | Henderson, TX 75653 | Oil & Gas Operator | Apr 2020 |
| 19 | Princess Three Operating, LLC | Henderson, TX 75653 | Oil & Gas Operator | Mar 2025 |
| 20 | PXP Gulf Coast Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 21 | PXP Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2007 |