| 1 | Pace Oil And Gas Company | Austin, TX 78715 | Oil & Gas Operator | Oct 2025 |
| 2 | Paladin-Hayes, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Dec 1999 |
| 3 | Paleo Oil Company LLC | Corpus Chrsti, TX 78411 | Oil & Gas Operator | Oct 2025 |
| 4 | Paloma Operating, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 5 | Panola Corporation, The | Dallas, TX 75252 | Oil & Gas Operator | Sep 2002 |
| 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 | Parker & Parsley Producing L.P. | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 9 | Patriot Operating Company, Inc. | Houston, TX 77008 | Oil & Gas Operator | Sep 2003 |
| 10 | Patterson Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Oct 2025 |
| 11 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Oct 2025 |
| 12 | Pedeco, Inc. | Casper, WY 82601 | Oil & Gas Operator | Mar 2008 |
| 13 | Pegasus Operating, Inc. | Coldspring, TX 77331 | Oil & Gas Operator | Oct 2025 |
| 14 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 15 | Peoples Energy Prod.-TX, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2007 |
| 16 | Perez, H. F. | Alice, TX 78332 | Oil & Gas Operator | May 2023 |
| 17 | Perlman,I.H.Oil & Gas Properties | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 18 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 19 | Petrogas Operating Corporation | Garland, TX 75043 | Oil Operator | Feb 2010 |
| 20 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 21 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Oct 2025 |
| 22 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Oct 2025 |
| 23 | Petromining, Inc. | Plano, TX 75026 | Oil & Gas Operator | Oct 2025 |
| 24 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 25 | PH Exploration, Inc. | Houston, TX 77008 | Oil & Gas Operator | Nov 2001 |
| 26 | Phillips Energy, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2018 |
| 27 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 28 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 29 | Pierco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Oct 2025 |
| 30 | Pintex Operating Inc. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Feb 2005 |
| 31 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 32 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 33 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 34 | Plantation Operating Co., Inc. | Holliday, TX 76366 | Oil & Gas Operator | Oct 2025 |
| 35 | Poff, H. Bryan | Fort Worth, TX 76103 | Oil & Gas Operator | Mar 2008 |
| 36 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 37 | Precio Energy, LLC | Beaumont, TX 77726 | Oil & Gas Operator | Oct 2025 |
| 38 | Presidio Exploration, Inc. | Englewood, CO 80155 | Oil & Gas Operator | May 1999 |
| 39 | Price Drilling & Exploration Co. | Benavides, TX 78341 | Oil & Gas Operator | Jul 2013 |
| 40 | Pride Exploration, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Jul 2015 |
| 41 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 42 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 43 | Production Resources, Inc. | Castroville, TX 78009 | Oil & Gas Operator | Oct 2025 |
| 44 | Progas Operating, Inc | Red Rock, TX 78662 | Oil & Gas Operator | Oct 2025 |
| 45 | Progas Properties, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Oct 2025 |
| 46 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Oct 2025 |
| 47 | Proton Energy, L.L.C. | Houston, TX 77002 | Oil & Gas Operator | Jun 2005 |
| 48 | Providence Oil Prod. | Freer, TX 78357 | Oil & Gas Operator | Oct 2025 |
| 49 | Pyramid Energy Inc | San Antonio, TX 78216 | Oil & Gas Operator | Feb 2012 |