| 1 | Pacific Enterprise Oil Co USA | Los Angeles, CA 90071-2005 | Oil & Gas Operator | Aug 2012 |
| 2 | Paleo, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 2024 |
| 3 | Passmore Robert W | Ada, OK 74820-5501 | Oil & Gas Operator | May 2022 |
| 4 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 5 | Patrick Exploration Company | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 6 | Pelican Production Company | New Orleans, LA 70130-2477 | Oil & Gas Operator | Mar 2014 |
| 7 | Penn VIrginia MC Operating Co LLC | Houston, TX 77084-7213 | Oil & Gas Operator | Oct 2024 |
| 8 | Petro-Hunt Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2003 |
| 9 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 10 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2024 |
| 11 | Pierco Energy Corp. | Dallas, TX 75231 | Oil & Gas Operator | Dec 2024 |
| 12 | Piper Operating LLC | Stigler, OK 74462 | Oil & Gas Operator | Oct 2024 |
| 13 | Pittman-Allen Operating LLC | Oklahoma City, OK 73122-1105 | Gas Operator | Feb 2016 |
| 14 | Plains Marketing & Trans Inc | Houston, TX 76002 | Oil & Gas Operator | Oct 1998 |
| 15 | Priam Operating Company | Tulsa, OK 74114 | Oil & Gas Operator | Jul 2022 |
| 16 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2024 |
| 17 | Proven Reserves Management, Inc. | Dallas, TX 75370 | Oil & Gas Operator | Oct 2024 |
| 18 | Providence Exploration & Production Inc | Fort Smith, AR 72913-5171 | Gas Operator | Dec 2012 |
| 19 | Psec Inc | Tulsa, OK 74102-0871 | Oil & Gas Operator | Dec 2016 |
| 20 | PXP Gulf Coast Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |