| 1 | P.B. Blue Dot Properties | Wexford, PA 15090 | Oil & Gas Operator | Apr 2024 |
| 2 | Paleo Oil Company LLC | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Apr 2024 |
| 3 | Palmer Petroleum Inc. | Shreveport, LA 71106 | Oil & Gas Operator | Apr 2024 |
| 4 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 5 | Parker & Parsley Producing LP | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 6 | Patrick Pet. Corp. Of Michigan | Houston, TX 77227 | Oil & Gas Operator | Aug 1995 |
| 7 | Patriot Operating Company, Inc. | Houston, TX 77008 | Oil & Gas Operator | Sep 2003 |
| 8 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 9 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 10 | Peregrine Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Jul 1999 |
| 11 | Petro Resources, Inc. | Fulton, TX 78358 | Oil & Gas Operator | Apr 2024 |
| 12 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Dec 2023 |
| 13 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 14 | Petroleum Resource Management Co | Fort Worth, TX 76107 | Oil & Gas Operator | Jan 2024 |
| 15 | Petron Energy Inc | Dallas, TX 75252 | Oil & Gas Operator | Apr 2024 |
| 16 | Petropro Energy Partners, L.P. | Houston, TX 77024 | Oil & Gas Operator | Jan 2013 |
| 17 | Petroquest Exploration, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 2008 |
| 18 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Apr 2024 |
| 19 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 20 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 21 | Phoenix Hydrocarbons Operating | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 22 | Pine Ridge Operating, L.P. | Waelder, TX 78959 | Oil & Gas Operator | Apr 2024 |
| 23 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Apr 2024 |
| 24 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 25 | Plains Marketing LP | Cushing, OK 74023 | Oil & Gas Operator | Dec 2022 |
| 26 | Plains Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2008 |
| 27 | PLR Energy, LLC | Houston, TX 77079 | Oil Operator | May 2018 |
| 28 | Pmo | Garland, TX 75040 | Oil & Gas Operator | Feb 2018 |
| 29 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 30 | Ponderosa Oil & Gas, LLC | Houston, TX 77008 | Oil & Gas Operator | Apr 2024 |
| 31 | Powerline Energy Corporation | Arlington, TX 76015 | Oil & Gas Operator | Apr 2024 |
| 32 | Presidio Exploration, Inc. | Englewood, CO 80155 | Oil & Gas Operator | May 1999 |
| 33 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2024 |
| 34 | Prime Natural Resources, Inc. | Houston, TX 77042 | Oil & Gas Operator | Jun 2007 |
| 35 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Apr 2024 |
| 36 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 37 | Production Gathering Company, LP | Dallas, TX 75206 | Oil & Gas Operator | Apr 2024 |
| 38 | Proex Energy Management, L.L.C. | Spring, TX 77386 | Oil & Gas Operator | Apr 2024 |
| 39 | Progenies Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Apr 2024 |
| 40 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2024 |
| 41 | Puls, W. L. | Houston, TX 77084 | Oil & Gas Operator | Sep 2002 |
| 42 | Pyramid Exploration | Houston, TX 77241 | Oil & Gas Operator | Sep 1995 |