| 1 | Palmer Petroleum, Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jun 2025 |
| 2 | Panola Corporation, The | Dallas, TX 75252 | Oil & Gas Operator | Sep 2002 |
| 3 | Patara Andover I LLC | Houston, TX 77002 | Oil & Gas Operator | Feb 2014 |
| 4 | Patara Oil & Gas LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2018 |
| 5 | Pedeco, Inc. | Casper, WY 82601 | Oil & Gas Operator | Mar 2008 |
| 6 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 7 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 8 | Penroc Oil Corp. | Hobbs, NM 88241 | Oil & Gas Operator | Jun 2026 |
| 9 | Permian Natural Resources | Tyler, TX 75701 | Oil & Gas Operator | Sep 2026 |
| 10 | Petralis Energy Resources, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 11 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 12 | Phylko Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 13 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jan 2025 |
| 14 | Pinnacle Operating Company, Inc. | Shreveport, LA 71135 | Oil & Gas Operator | Sep 2026 |
| 15 | Pitco Investments, LTD. | Scottsdale, AZ 85261 | Oil & Gas Operator | Jan 2013 |
| 16 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 17 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 18 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 19 | Powell, Gene Investments, Inc. | Longview, TX 75608 | Oil & Gas Operator | Apr 2024 |
| 20 | Prosper Oil & Gas,Inc. | Dallas, TX 75201 | Oil & Gas Operator | Sep 2026 |