| 1 | P-2 Exploration Co. | Amarillo, TX 79124 | Oil & Gas Operator | Feb 2005 |
| 2 | P. L. O. | Boerne, TX 78006 | Oil & Gas Operator | Jun 2016 |
| 3 | Paleo, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 4 | Palo Duro Resources LLC | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 5 | Pampa Water Disposal, Inc. | Perryton, TX 79070 | Oil & Gas Operator | Feb 2026 |
| 6 | Pan Resources, Inc. | Borger, TX 79007 | Oil & Gas Operator | Mar 2008 |
| 7 | Panhandle Producing Co., Oper. | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 8 | Panhandle Producing Company | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 9 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Feb 2026 |
| 10 | Parallel Energy LP | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2015 |
| 11 | Pash Energy, Inc. | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 12 | Perkins-Prothro Company | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2002 |
| 13 | Petro-Haley | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 14 | Petrolia Group, L.L.C. | Katy, TX 77449 | Oil & Gas Operator | Feb 2026 |
| 15 | PG-M International Operating,LLC | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 16 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 17 | Pioneer Natural Res. USA, Inc. | Spring, TX 77389 | Oil & Gas Operator | Feb 2026 |
| 18 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 19 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 20 | Plemons Enterprises | Borger, TX 79008 | Oil & Gas Operator | Aug 1998 |
| 21 | Plumley, M. C. & Associates | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 22 | Pogo Panhandle 2004, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2017 |
| 23 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 24 | Polaris Operating, LLC | Dallas, TX 75225 | Oil & Gas Operator | Feb 2026 |
| 25 | Ponderosa Petroleum, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Feb 2026 |
| 26 | Ponderosa TX Operating LLC | Stinnett, TX 79083 | Oil & Gas Operator | Feb 2026 |
| 27 | Pony Oil Company | Borger, TX 79008 | Oil & Gas Operator | Jul 2001 |
| 28 | Porter Operating Company, L.L.C. | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 29 | Post Oak Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2013 |
| 30 | Prairie Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Jan 2017 |
| 31 | Producers Environmental Ser. Inc | Borger, TX 79008 | Oil & Gas Operator | Feb 2026 |
| 32 | Pruett, Cecil | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |