| 1 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 2 | Palisades Operating Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 3 | Par Producing Company | Snyder, TX 79550 | Oil & Gas Operator | Jun 2017 |
| 4 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 5 | Parallel Petroleum LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 6 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 7 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 8 | Partee Drilling Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2026 |
| 9 | Patrick Pet. Corp. Of Michigan | Houston, TX 77227 | Oil & Gas Operator | Aug 1995 |
| 10 | Patriot Resources, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 11 | Patterson Petroleum LLC | Snyder, TX 79550 | Oil & Gas Operator | Oct 2007 |
| 12 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 13 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 14 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 15 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 16 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 17 | Peregrine Petroleum PRTNR, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 18 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 19 | Perry Producing Company, Inc. | Ackerly, TX 79713 | Oil & Gas Operator | Apr 2026 |
| 20 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2026 |
| 21 | Petroplex Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 22 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 23 | Pgi Operating, LLC | Sweetwater, TX 79556 | Oil Operator | Apr 2026 |
| 24 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 25 | Philmar | Houston, TX 77269 | Oil Operator | Apr 2026 |
| 26 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Feb 2026 |
| 27 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Dec 2025 |
| 28 | Pioneer Exploration, LTD. | Houston, TX 77090 | Oil & Gas Operator | Sep 2008 |
| 29 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 30 | Pitts Energy Co. | Midland, TX 79707 | Oil & Gas Operator | Apr 2026 |
| 31 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 32 | Plantation Operating, LLC | Houston, TX 77041 | Oil & Gas Operator | Nov 2011 |
| 33 | Platinum Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 34 | PMB Energy, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Apr 2026 |
| 35 | Prensorus Energy, LLC | Abilene, TX 79604 | Oil & Gas Operator | Apr 2026 |
| 36 | Prentice Petroleum, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Sep 1994 |
| 37 | Presco | Snyder, TX 79549 | Oil & Gas Operator | Jan 2024 |
| 38 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Apr 2026 |
| 39 | Primrose Operating Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2007 |
| 40 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 41 | Probe Exploration Company | Abilene, TX 79605 | Oil & Gas Operator | Apr 2026 |
| 42 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |
| 43 | Purvis, J. H. | Midland, TX 79702 | Oil & Gas Operator | Dec 1994 |