| 1 | Palmer Petroleum Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 2 | Paloma Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 3 | Par Minerals Corporation | Shreveport, LA 71101 | Oil & Gas Operator | Oct 2025 |
| 4 | Patara Oil & Gas LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2018 |
| 5 | Patriot Operating Company, Inc. | Houston, TX 77008 | Oil & Gas Operator | Sep 2003 |
| 6 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 7 | Permian Natural Resources | Pflugerville, TX 78660 | Oil & Gas Operator | Oct 2025 |
| 8 | Perryman Operating Company | Athens, TX 75751 | Oil & Gas Operator | Oct 2025 |
| 9 | Petrohawk Energy Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 10 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 11 | PG-M International Operating,LLC | Borger, TX 79008 | Oil & Gas Operator | Oct 2025 |
| 12 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 13 | Pine Wave Energy Partners Op,LLC | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 14 | Pioneer Energy Corporation | Dallas, TX 75204 | Oil & Gas Operator | Oct 2025 |
| 15 | Placid Oil Company | Houston, TX 77227 | Oil & Gas Operator | Mar 2008 |
| 16 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 17 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 18 | Powerline Energy Corp. | Arlington, TX 76015 | Oil & Gas Operator | Oct 2025 |
| 19 | Princess Three Operating, LLC | Henderson, TX 75653 | Oil & Gas Operator | Oct 2025 |