| 1 | Pan American Sales Corporation | Dallas, TX 75202 | Oil & Gas Operator | Mar 2001 |
| 2 | Panhandle Producing Company | San Antonio, TX 78205 | Oil & Gas Operator | Oct 1993 |
| 3 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Dec 2024 |
| 4 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 5 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 6 | Petroleum Management, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Dec 2024 |
| 7 | Petropro Energy Partners, L.P. | Houston, TX 77024 | Oil & Gas Operator | Jan 2013 |
| 8 | Pheffer Oil, L.L.C. | Laredo, TX 78041 | Oil Operator | Jul 2021 |
| 9 | Philpott Oil & Gas Co Inc | Atwood, KS 67730 | Oil Operator | Aug 2010 |
| 10 | Pi Energy, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Dec 2024 |
| 11 | Pickens Company, Inc., The | Dallas, TX 75225 | Oil & Gas Operator | Jun 2024 |
| 12 | Pintex Operating Inc. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Feb 2005 |
| 13 | Pitco Investments, LTD. | Scottsdale, AZ 85261 | Oil & Gas Operator | Jan 2013 |
| 14 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 15 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 16 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2024 |
| 17 | Price Drilling & Exploration Co. | Benavides, TX 78341 | Oil & Gas Operator | Jul 2013 |
| 18 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2024 |
| 19 | Pringle Resources, Inc. | Houston, TX 77019 | Oil & Gas Operator | Dec 2024 |
| 20 | Progas Properties, Inc. | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2024 |