| 1 | Paroco DRLG Funds Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 1993 |
| 2 | Partners Oil Company | Tulsa, OK 74135 | Oil & Gas Operator | Aug 1995 |
| 3 | Petro Drilling Corp | Columbus, OH 43229 | Oil & Gas Operator | Dec 1993 |
| 4 | Petro Quest Inc | Guysville, OH 45735 | Oil & Gas Operator | Dec 2023 |
| 5 | Petroleum Development Cor | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2004 |
| 6 | Petrox, Inc | Streetsboro, OH 44241 | Oil & Gas Operator | Dec 2023 |
| 7 | Pettigrew Pumping Service Inc | Ravenna, OH 44266 | Oil & Gas Operator | Dec 2023 |
| 8 | Pin Oak Energy Partners LLC | Akron, OH 44311 | Oil & Gas Operator | Jan 2024 |
| 9 | Pominex Inc | Cols, OH 43214 | Oil & Gas Operator | Dec 1988 |
| 10 | Ponderosa Consulting Services Inc | Wooster, OH 44691 | Oil & Gas Operator | Dec 2019 |
| 11 | Poorboy Exploration LLC | Caldwell, OH 43724-9134-9134 | Oil & Gas Operator | Dec 2022 |
| 12 | Porter Petroleum | Hopewell, OH 43746 | Oil & Gas Operator | Dec 2021 |
| 13 | Power Gas Marketing & Trans | Akron, OH 44311-1057-1057 | Oil & Gas Operator | Dec 2005 |
| 14 | Prime Energy Corp | Charleston, WV 25301-1707-1707 | Oil & Gas Operator | Sep 2015 |
| 15 | Prime Time Energy Investment Inc | MT Vernon, OH 43050 | Oil & Gas Operator | Dec 2023 |