| 1 | Pacific Enterprise Oil Co USA | Los Angeles, CA 90071-2005 | Oil & Gas Operator | Aug 2012 |
| 2 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Oct 2025 |
| 3 | Pardee Production Co. | Skiatook, OK 74070 | Oil & Gas Operator | Mar 2021 |
| 4 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 5 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Jan 2025 |
| 6 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 7 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 8 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2025 |
| 9 | Pioneer Resources Prod LP | Irving, TX 75039-3745 | Oil & Gas Operator | Feb 2005 |
| 10 | Plains Resources Inc. | Houston, TX 77002 | Oil & Gas Operator | Jul 2008 |
| 11 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 12 | Presidio Petroleum LLC | Canadian, TX 79014 | Oil & Gas Operator | Oct 2025 |
| 13 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Oct 2025 |
| 14 | Prime Energy Corp | Charleston, WV 25301-1707 | Oil & Gas Operator | Sep 2015 |
| 15 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 16 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |