| 1 | P & A Oilfield Services, Inc. | | Oil & Gas Operator | Jan 1998 |
| 2 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 3 | Panaco Production Co | Houston, TX 77002 | Oil & Gas Operator | Dec 1999 |
| 4 | Panaco, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2025 |
| 5 | Park Exploration Inc | | Oil & Gas Operator | Nov 2012 |
| 6 | Parker & Parsley Devpt L P | | Oil & Gas Operator | Oct 1997 |
| 7 | Paxton Oil Company | | Oil & Gas Operator | Dec 2024 |
| 8 | Paxton Petroleum, LTD. | | Oil & Gas Operator | May 1989 |
| 9 | Pedernales Production, LP | Houston, TX 77057 | Oil & Gas Operator | Mar 2022 |
| 10 | Petro-Guard Company, Inc. | Houston, TX 77057 | Oil & Gas Operator | Nov 2014 |
| 11 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | Oct 2025 |
| 12 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Jun 2025 |
| 13 | Petroleum Corporation Of Texas | Breckenridge, TX 76024 | Oil & Gas Operator | May 2002 |
| 14 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2025 |
| 15 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Oct 2025 |
| 16 | Phoenix Oil & Gas LTD., L.L.P. | Houston, TX 77010 | Oil & Gas Operator | Jun 2004 |
| 17 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Jun 2025 |
| 18 | Plains Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2008 |
| 19 | Plano Corp. | | Oil & Gas Operator | Mar 2005 |
| 20 | Ponderosa Oil & Gas, LLC | Houston, TX 77008 | Oil & Gas Operator | Oct 2025 |
| 21 | Presidio Exploration, Inc. | Englewood, CO 80155 | Oil & Gas Operator | May 1999 |
| 22 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 23 | Progenies Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Oct 2025 |
| 24 | Prudential Oil & Gas, Inc. | | Oil & Gas Operator | Jul 1987 |
| 25 | Prudential Petroleum Co., LTD. | | Oil & Gas Operator | Dec 1990 |