| 1 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 2 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 3 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 4 | Parten Operating Inc. | Houston, TX 77069 | Oil & Gas Operator | Oct 2025 |
| 5 | Patara Andover I LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2014 |
| 6 | Patara Oil & Gas LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2018 |
| 7 | Peak Operating Of Texas, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 8 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 9 | Pedernales Petroleum Op, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 10 | Perryman Operating Company | Athens, TX 75751 | Oil & Gas Operator | Oct 2025 |
| 11 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 12 | Petro-Chem Operating Company, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 13 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 14 | Petroleum Investments, Inc | Shreveport, LA 71101 | Oil & Gas Operator | Dec 1977 |
| 15 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Oct 2025 |
| 16 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 17 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 18 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 19 | Phillips, Jack L. | Gladewater, TX 75647 | Oil & Gas Operator | Dec 1997 |
| 20 | Phillips, Jack L. Co. | Gladewater, TX 75647 | Oil & Gas Operator | Oct 2025 |
| 21 | Phoenix Hydrocarbons Operating | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 22 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 23 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 24 | Powerline Energy Corp. | Arlington, TX 76015 | Oil & Gas Operator | Oct 2025 |
| 25 | Precision Operating Inc. | Richardson, TX 75080 | Oil & Gas Operator | Jul 2014 |
| 26 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Oct 2025 |
| 27 | Psi Production, Inc. | Tyler, TX 75702 | Gas Operator | Jan 1994 |
| 28 | PXP Gulf Coast Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 29 | PXP Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2007 |