| 1 | Pactola Development Co | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2004 |
| 2 | Page Energy | Eldorado, TX 76936 | Oil & Gas Operator | Mar 1997 |
| 3 | Paladin Exploration Co., Inc. | Plano, TX 75093 | Oil & Gas Operator | Feb 1995 |
| 4 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 5 | Panther Creek Resources, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2012 |
| 6 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 7 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 8 | Parker & Parsley Producing L.P. | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 9 | Patrick Exploration Company | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 10 | Patrick Pet. Corp. Of Michigan | Houston, TX 77227 | Oil & Gas Operator | Aug 1995 |
| 11 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 12 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 13 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 14 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 15 | Perdure Petroleum LLC | Allen, TX 75013 | Oil & Gas Operator | Oct 2021 |
| 16 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 17 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 18 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 2025 |
| 19 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Sep 2025 |
| 20 | Petro Vest, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2014 |
| 21 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 22 | Petrosource Production Co. L.P. | Midland, TX 79701 | Oil & Gas Operator | Nov 2007 |
| 23 | Petrosource Production Co., LLC | Midland, TX 79705 | Oil & Gas Operator | Sep 2025 |
| 24 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Sep 2025 |
| 25 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Sep 2025 |
| 26 | Pitts Energy Co. | Midland, TX 79707 | Oil & Gas Operator | Sep 2025 |
| 27 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 28 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 29 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 30 | Pony Express Corporate Trust | Aledo, TX 76008 | Oil & Gas Operator | Sep 2025 |
| 31 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 32 | Producers Operating Co Inc | Amarillo, TX 79105 | Oil & Gas Operator | Sep 2025 |