| 1 | Palmer Oil, Inc. | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 2 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Oct 2025 |
| 3 | Parker & Parsley | | Oil & Gas Operator | Dec 1996 |
| 4 | Pennzenergy Exploration & Production LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2009 |
| 5 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 6 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 7 | Petroleum Produc | | Oil & Gas Operator | Dec 1996 |
| 8 | Petroleum Production Management, Inc. | Shawnee Mission, KS 66202 | Oil & Gas Operator | Nov 2021 |
| 9 | Petroleum Technologies, Inc. | Kansas City, MO 64112 | Oil & Gas Operator | Jun 2025 |
| 10 | Petrosantander (USA) Inc. | Houston, TX 77057 | Oil & Gas Operator | Jun 2025 |
| 11 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 12 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Jul 2025 |
| 13 | Pioneer Oil Company, Inc. | Vincennes, IN 47501 | Oil & Gas Operator | Jun 2025 |
| 14 | Plains Petroleum | | Gas Operator | Dec 1996 |
| 15 | Presco Western LLC | Houston, TX 77046 | Oil & Gas Operator | Jun 2025 |
| 16 | PT Oil LLC | Osage City, KS 66523 | Oil & Gas Operator | Jun 2025 |