| 1 | Padon, Frank B. Oil Oper., Inc. | Houston, TX 77227 | Oil & Gas Operator | Nov 1998 |
| 2 | Paladin-Hayes, L.L.C. | Austin, TX 78746 | Oil & Gas Operator | Dec 1999 |
| 3 | Paloma Operating, LLC | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Nov 2024 |
| 4 | Panhandle Producing Company | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 5 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 6 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 7 | Parker & Parsley Producing LP | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 8 | Patrick Pet. Corp. Of Michigan | Houston, TX 77227 | Oil & Gas Operator | Aug 1995 |
| 9 | Patterson Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Nov 2024 |
| 10 | Patterson Petroleum LLC | Snyder, TX 79550 | Oil & Gas Operator | Oct 2007 |
| 11 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 12 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 13 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 14 | Pegasus Operating, Inc. | Coldspring, TX 77331 | Oil & Gas Operator | Nov 2024 |
| 15 | Pegasus Petroleum Corporation | Corpus Chrsti, TX 78476 | Oil & Gas Operator | Nov 2024 |
| 16 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2018 |
| 17 | Penwell Energy, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2024 |
| 18 | Perlman,I.H.Oil & Gas Properties | Houston, TX 77056 | Oil & Gas Operator | Mar 2008 |
| 19 | Petech Enterprises, Inc. | Houston, TX 77066 | Oil & Gas Operator | Jan 2004 |
| 20 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |
| 21 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Jul 2024 |
| 22 | Petrogas Operating Corporation | Garland, TX 75043 | Oil Operator | Feb 2010 |
| 23 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 24 | Petroleum Management Int'L, Inc. | Sugar Land, TX 77487 | Oil & Gas Operator | Oct 1993 |
| 25 | Petropro Energy Partners, L.P. | Houston, TX 77024 | Oil & Gas Operator | Jan 2013 |
| 26 | Petroreal Inc. | Temple, TX 76503 | Oil & Gas Operator | Nov 2024 |
| 27 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 28 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Nov 2024 |
| 29 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 30 | Phylko Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 31 | Pine Ridge Operating, L.P. | Waelder, TX 78959 | Oil & Gas Operator | Nov 2024 |
| 32 | Pintail Production Co., Inc. | Fort Worth, TX 76132 | Oil & Gas Operator | Nov 2024 |
| 33 | Pintex Operating Inc. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Feb 2005 |
| 34 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Nov 2024 |
| 35 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 36 | Pitco Investments, LTD. | Scottsdale, AZ 85261 | Oil & Gas Operator | Jan 2013 |
| 37 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 38 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 39 | Poynor Corporation | Beaumont, TX 77706 | Oil & Gas Operator | Nov 2024 |
| 40 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2024 |
| 41 | Pringle Resources, Inc. | Houston, TX 77019 | Oil & Gas Operator | Nov 2024 |
| 42 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 43 | Producers Well Service, Inc. | Boling, TX 77420 | Oil & Gas Operator | Nov 2024 |
| 44 | Proline Energy Resources Inc | Sugar Land, TX 77479 | Oil & Gas Operator | Nov 2024 |
| 45 | Property Development Group, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Nov 2024 |
| 46 | Pure Resources, L.P. | Midland, TX 79701 | Oil & Gas Operator | Mar 2006 |