| 1 | Painter & McPhail | Bartlesville, OK 74006 | Oil Operator | Sep 1996 |
| 2 | Pan Petroleum MLP | Kansas City, MO 64114 | Oil & Gas Operator | Aug 1997 |
| 3 | Panoak Oil & Gas Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Aug 2018 |
| 4 | Parker & Parsley Dev Co | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 5 | Parwest Land Exploration, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Jun 2025 |
| 6 | Patterson Eddy L | Tulsa, OK 74133 | Oil & Gas Operator | Feb 2022 |
| 7 | Pawnee Oil And Gas, Inc. | Richardson, TX 75083 | Oil & Gas Operator | May 2023 |
| 8 | Paystone Oil Corporation | Tulsa, OK 74105 | Oil Operator | Mar 2009 |
| 9 | Pelican Dome Exploration Inc | Harahan, LA 70123 | Oil & Gas Operator | Aug 2000 |
| 10 | Pemco LLC | Skiatook, OK 74070 | Oil Operator | Jun 2025 |
| 11 | Performance Energy Partners LLC | Barnsdall, OK 74002-0628 | Oil & Gas Operator | Oct 2024 |
| 12 | Performance Operating Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Jun 2025 |
| 13 | Performance Petroleum Company LLC | Barnsdall, OK 74002 | Oil & Gas Operator | Jun 2025 |
| 14 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 15 | Petroleum Explo Prod Inc | Oilton, OK 74052 | Oil & Gas Operator | Jan 2017 |
| 16 | Phillips, Warren P | | Oil & Gas Operator | Apr 2011 |
| 17 | Pierce Oil Company | Skiatook, OK 74070 | Oil & Gas Operator | Nov 2017 |
| 18 | Pierson Max S | Bartlesville, OK 74003-5909 | Oil Operator | Sep 2020 |
| 19 | Putnam Phyllis L | Bartlesville, OK 74006-7326 | Oil & Gas Operator | May 2021 |