| 1 | P.O.S. Energy, Inc. | Buna, TX 77612 | Oil & Gas Operator | Oct 2025 |
| 2 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 3 | Parker & Parsley Producing L.P. | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 4 | Parkwood Production, Inc. | Buna, TX 77612 | Oil Operator | Oct 2025 |
| 5 | Patrick Pet. Corp. Of Michigan | Houston, TX 77227 | Oil & Gas Operator | Aug 1995 |
| 6 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 7 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 8 | Petro-Guard Production,L.L.C. | Houston, TX 77063 | Oil & Gas Operator | Dec 2024 |
| 9 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Jun 2025 |
| 10 | Petroleum Resource Management Co | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 11 | Phoenix Oil & Gas LTD., L.L.P. | Houston, TX 77010 | Oil & Gas Operator | Jun 2004 |
| 12 | Phylko Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 13 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 14 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 15 | Plover Production Company | Fort Worth, TX 76109 | Oil & Gas Operator | Jul 2006 |
| 16 | Pmo | Garland, TX 75040 | Oil & Gas Operator | Feb 2018 |
| 17 | Poynor Corporation | Beaumont, TX 77706 | Oil & Gas Operator | Oct 2025 |
| 18 | Premium Exploration Company | Early, TX 76803 | Oil & Gas Operator | Oct 2025 |
| 19 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 20 | Prize Exploration & Prod, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 21 | Prize Exploration, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Oct 2025 |
| 22 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 23 | Progenies Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |