| 1 | P.O.S. Energy, Inc. | Buna, TX 77612 | Oil & Gas Operator | Mar 2025 |
| 2 | Panther Bayou Energy, LLC | Houston, TX 77070 | Oil & Gas Operator | Apr 2021 |
| 3 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 4 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 5 | Pecos Petroleum Company | Houston, TX 77057 | Oil & Gas Operator | Oct 1999 |
| 6 | Permian Natural Resources | Austin, TX 78701 | Oil & Gas Operator | Mar 2025 |
| 7 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 8 | Petro-Smith Operating LLC | Houston, TX 77010 | Oil & Gas Operator | Mar 2025 |
| 9 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Mar 2025 |
| 10 | Petronomics, Inc. | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 11 | Phillips 66 Company | Bartlesville, OK 74004 | Oil & Gas Operator | Aug 1997 |
| 12 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 13 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 14 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 15 | Premium Exploration Company | Early, TX 76803 | Oil & Gas Operator | Mar 2025 |
| 16 | Prime Time Oil & Gas Co., LTD. | Ruidoso, NM 88345 | Oil & Gas Operator | Mar 2003 |
| 17 | Pringle Resources, Inc. | Houston, TX 77019 | Oil & Gas Operator | Mar 2025 |
| 18 | Prize Exploration & Prod, LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |