| 1 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 2 | Palo Duro Resources LLC | Perryton, TX 79070 | Oil & Gas Operator | Dec 2024 |
| 3 | Pan Western Energy Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Dec 2024 |
| 4 | Panhandle Producing Company | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 5 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Dec 2024 |
| 6 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 7 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 8 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 9 | Petro-Smith Operating LLC | Houston, TX 77010 | Oil & Gas Operator | Dec 2024 |
| 10 | PG-M International Operating,LLC | Borger, TX 79008 | Oil & Gas Operator | Dec 2024 |
| 11 | Phillips 66 Company | Bartlesville, OK 74004 | Oil & Gas Operator | Aug 1997 |
| 12 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 13 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jun 2024 |
| 14 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Dec 2024 |
| 15 | Pitchfork Investments, LLC | Amarillo, TX 79109 | Oil & Gas Operator | Dec 2024 |
| 16 | Pogo Panhandle 2004, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2017 |
| 17 | Pony Oil Company | Borger, TX 79008 | Oil & Gas Operator | Jul 2001 |
| 18 | Protege Energy LLC | Tulsa, OK 74135 | Oil & Gas Operator | Jan 2018 |