| 1 | Pace West Production LC | San Angelo, TX 76904 | Oil & Gas Operator | Sep 1995 |
| 2 | Padon, Frank B. Oil Oper., Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1998 |
| 3 | Paloma Operating, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Oct 2025 |
| 4 | Pantano Energy | San Antonio, TX 78258 | Oil & Gas Operator | Jul 1999 |
| 5 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 6 | Parker & Parsley Producing L.P. | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 7 | Patriot Operating Company, Inc. | Houston, TX 77008 | Oil & Gas Operator | Sep 2003 |
| 8 | Patterson Petroleum LLC | Snyder, TX 79550 | Oil & Gas Operator | Oct 2007 |
| 9 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 10 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 11 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Oct 2025 |
| 12 | Pegasus Operating, Inc. | Coldspring, TX 77331 | Oil & Gas Operator | Oct 2025 |
| 13 | Pennzenergy Exp. & Prod., L.L.C. | Houston, TX 77210 | Oil & Gas Operator | Mar 2000 |
| 14 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 15 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 16 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 17 | Petro Vest, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2014 |
| 18 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 19 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 20 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Jun 2025 |
| 21 | Petroglyph Operating Co | Boise, ID 83709 | Oil & Gas Operator | Jul 2017 |
| 22 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Oct 2025 |
| 23 | Petropro Energy Partners, L.P. | Houston, TX 77024 | Oil & Gas Operator | Jan 2013 |
| 24 | PH Exploration, Inc. | Houston, TX 77008 | Oil & Gas Operator | Nov 2001 |
| 25 | Phere Operating Inc | Spring Branch, TX 78070 | Oil & Gas Operator | Oct 2025 |
| 26 | Phylko Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 27 | Pi Energy, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 28 | Pierce Junction Petroleum Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2010 |
| 29 | Pine Ridge Operating, L.P. | Waelder, TX 78959 | Oil & Gas Operator | Oct 2025 |
| 30 | Pintail Oil & Gas, LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2019 |
| 31 | Pintail Production Co., Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Oct 2025 |
| 32 | Pintex Operating Inc. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Feb 2005 |
| 33 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Oct 2025 |
| 34 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 35 | Pitchfork Oil & Gas, Inc. | Orchard, TX 77464 | Oil & Gas Operator | Oct 2025 |
| 36 | Placer Oil Co. | Sugar Land, TX 77479 | Oil & Gas Operator | Apr 2008 |
| 37 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 38 | Pmo | Garland, TX 75040 | Oil & Gas Operator | Feb 2018 |
| 39 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 40 | Premier Minerals, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 2025 |
| 41 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2025 |
| 42 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 43 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 44 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Oct 2025 |
| 45 | Property Development Group, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 46 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |
| 47 | Pyramid Energy Inc | San Antonio, TX 78216 | Oil & Gas Operator | Feb 2012 |