| 1 | P-R-O Management, Inc. | Dallas, TX 75240 | Oil & Gas Operator | Oct 2025 |
| 2 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 3 | Pacific Enterprises Royalty Co | Oklahoma City, OK 73101 | Oil & Gas Operator | Feb 2002 |
| 4 | Paladin Petroleum III, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 5 | Palo Petroleum, Inc. | Dallas, TX 75360 | Oil & Gas Operator | Oct 2025 |
| 6 | Paloma Natural Gas, LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 7 | Pangea Corporation | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2025 |
| 8 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 9 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 10 | Parapetroleum | Kerrville, TX 78028 | Oil & Gas Operator | Feb 1997 |
| 11 | Parker & Parsley Acq. Group LLC | Midland, TX 79702 | Oil & Gas Operator | Aug 2002 |
| 12 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 13 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 14 | Parker & Parsley Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Nov 2000 |
| 15 | Parsley Energy Operations, LLC | Irving, TX 75038 | Oil & Gas Operator | Jan 2021 |
| 16 | Partee Drilling Inc. | Big Spring, TX 79721 | Oil & Gas Operator | Oct 2025 |
| 17 | Patrick Exploration Company | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 18 | Patriot Resources, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 19 | Patriot Services, Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Mar 2008 |
| 20 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 21 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 22 | PDC Energy | Denver, CO 80203 | Oil & Gas Operator | Nov 2012 |
| 23 | PDC-WV-Co Corporation | Denver, CO 80203 | Oil & Gas Operator | Aug 2010 |
| 24 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Oct 2025 |
| 25 | Pecos River Exploration, LLC | Allen, TX 75013 | Oil & Gas Operator | Jun 2025 |
| 26 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 27 | Penergy | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 28 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 29 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 30 | Permian West Corp. | Odessa, TX 79762 | Oil & Gas Operator | Oct 2025 |
| 31 | Perry Producing Company, Inc. | Ackerly, TX 79713 | Oil & Gas Operator | Oct 2025 |
| 32 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 33 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 34 | Petroplex Energy Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 35 | Petroplex Equipment, Inc. | Midland, TX 79701 | Oil & Gas Operator | May 2019 |
| 36 | Petrosource Energy Corporation | Fort Worth, TX 76112 | Oil & Gas Operator | Oct 2025 |
| 37 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 38 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Oct 2025 |
| 39 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 40 | Pintail Production Co., Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Oct 2025 |
| 41 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 42 | Pitco Investments, LTD. | Scottsdale, AZ 85261 | Oil & Gas Operator | Jan 2013 |
| 43 | Pitts Energy Co. | Midland, TX 79707 | Oil & Gas Operator | Oct 2025 |
| 44 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 45 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 46 | Platform Operating, LLC | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 47 | Platinum Exploration Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 48 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 49 | Pontotoc Oil Corp. | Midland, TX 79702 | Oil & Gas Operator | Feb 1996 |
| 50 | Premier Natural Resources, L.P. | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2007 |
| 51 | Premier Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2025 |
| 52 | Prensorus Energy, LLC | Abilene, TX 79604 | Oil & Gas Operator | Oct 2025 |
| 53 | Primal Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2025 |
| 54 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 55 | Probe Exploration Company | Abilene, TX 79605 | Oil & Gas Operator | Oct 2025 |
| 56 | Probity Operating, LLC | Midland, TX 79708 | Oil & Gas Operator | Jul 2014 |
| 57 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |