| 1 | Panther Creek Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2012 |
| 2 | Paradis Investments, L.L.C. | Bellaire, TX 77401 | Oil Operator | Jun 2020 |
| 3 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 4 | Parker & Parsley Producing LP | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 5 | Parkway Petroleum, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Jul 1997 |
| 6 | Partners Production, Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Jun 2025 |
| 7 | Patterson Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Jun 2025 |
| 8 | Patterson Petroleum LLC | Snyder, TX 79550 | Oil & Gas Operator | Oct 2007 |
| 9 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 10 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jun 2025 |
| 11 | Pavlas Oil & Gas | Rockdale, TX 76567 | Oil & Gas Operator | Jun 2025 |
| 12 | Pendragon Oil Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Jun 2025 |
| 13 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Mar 2025 |
| 14 | Penrod Oil Company Of Texas, Inc | Milano, TX 76556 | Oil & Gas Operator | Jun 2025 |
| 15 | Permian West Corp. | Odessa, TX 79762 | Oil & Gas Operator | Jun 2025 |
| 16 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 17 | Petro Delta | Rockdale, TX 76567 | Oil Operator | Jun 2025 |
| 18 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Jun 2025 |
| 19 | Pgo, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 1999 |
| 20 | Pharaoh & Associates, Inc. | Houston, TX 77252 | Oil & Gas Operator | Aug 2002 |
| 21 | Pierce Operating Company, L.L.C. | Bryan, TX 77808 | Oil & Gas Operator | Dec 2018 |
| 22 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Jun 2025 |
| 23 | Placer Oil Co. | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2008 |
| 24 | Pmo | Garland, TX 75040 | Oil & Gas Operator | Feb 2018 |
| 25 | Poff, H. Bryan | Fort Worth, TX 76103 | Oil & Gas Operator | Mar 2008 |
| 26 | Powerline Energy Corporation | Arlington, TX 76015 | Oil & Gas Operator | Jun 2025 |
| 27 | Precise Development, Inc. | Austin, TX 78709 | Oil & Gas Operator | May 2005 |
| 28 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Jun 2025 |
| 29 | Producers Engineering Company | Destin, FL 32541 | Oil & Gas Operator | Sep 1999 |
| 30 | Production Enterprises | Houston, TX 77075 | Oil & Gas Operator | Aug 2007 |
| 31 | Progenies Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Jun 2025 |
| 32 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Jun 2025 |