| 1 | Panda Resources | | Gas Operator | Aug 1989 |
| 2 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Feb 2026 |
| 3 | Pennzenergy Exploration And Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 4 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 5 | Petroleum Development Company | Tulsa, OK 74103 | Oil & Gas Operator | Nov 2025 |
| 6 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 7 | Petroleum Production Management Inc | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 8 | Petrosantander (USA) Inc. | Houston, TX 77057 | Oil & Gas Operator | Sep 2025 |
| 9 | Pickrell Drilling Co., Inc. | Wichita, KS 67213 | Oil & Gas Operator | Sep 2025 |
| 10 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 11 | Plains Petroleum | | Gas Operator | Dec 1996 |
| 12 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 13 | Post & Mastin Well Service, Inc. | Garden City, KS 67846 | Oil Operator | May 2016 |
| 14 | Prairie Energy LC | Oklahoma City, OK 73118 | Gas Operator | Jun 2014 |
| 15 | PT Oil LLC | Osage City, KS 66523 | Oil & Gas Operator | Jul 2025 |