| 1 | P-Tex Petroleum, Inc. | Dallas, TX 75238 | Oil & Gas Operator | Nov 1999 |
| 2 | Pace Petroleum Company | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 3 | Paragon Corporation | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 4 | Paragon Oil & Gas, LLC | Aledo, TX 76008 | Oil & Gas Operator | Oct 2025 |
| 5 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 6 | Parmer, I. A. | Abilene, TX 79606 | Oil & Gas Operator | Oct 1993 |
| 7 | Paschal Petroleum, Inc. | Dallas, TX 75380 | Oil & Gas Operator | Apr 1994 |
| 8 | Patton Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 9 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 10 | Peak Operating Of Texas, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2005 |
| 11 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 12 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 13 | Pendergraft Oil Co. | Lueders, TX 79533 | Oil & Gas Operator | Jan 1998 |
| 14 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 15 | Permian Legend LLC | San Marcos, TX 78666 | Oil Operator | Oct 2025 |
| 16 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 17 | Perry, J. R. & Co. | Haskell, TX 79521 | Oil & Gas Operator | Jul 2015 |
| 18 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 19 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 20 | Petrosource Energy Corporation | Fort Worth, TX 76112 | Oil & Gas Operator | Oct 2025 |
| 21 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 22 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 23 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 24 | Pioneer Energy Corporation | Dallas, TX 75204 | Oil & Gas Operator | Oct 2025 |
| 25 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 26 | Pmo | Garland, TX 75040 | Oil & Gas Operator | Feb 2018 |
| 27 | Pony Express Corporate Trust | Aledo, TX 76008 | Oil & Gas Operator | Oct 2025 |
| 28 | PPC Operating Company LLC | Houston, TX 77279 | Oil & Gas Operator | Jul 2019 |
| 29 | Price, W. H. | Granbury, TX 76048 | Oil & Gas Operator | Jun 2024 |