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