| 1 | Paisano Production, Inc. | Somerset, TX 78069 | Oil Operator | Mar 2025 |
| 2 | Pal Energy LLC | Guymon, OK 73942-1950 | Gas Operator | Aug 2009 |
| 3 | Park Avenue Resources, Inc. | San Antonio, TX 78212 | Oil Operator | Mar 2025 |
| 4 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 5 | Partin, Charles | Atascosa, TX 78002 | Oil & Gas Operator | Aug 2005 |
| 6 | Patterson Energy Corporation | Dallas, TX 75205 | Oil & Gas Operator | Mar 2025 |
| 7 | Pearl, Bill H. Productions, Inc. | Corpus Chrsti, TX 78460 | Oil & Gas Operator | Mar 2025 |
| 8 | Pedeco, Inc. | Casper, WY 82601 | Oil & Gas Operator | Mar 2008 |
| 9 | Penrod Oil Company Of Texas, Inc | Milano, TX 76556 | Oil & Gas Operator | Mar 2025 |
| 10 | Petro Lions, LLC | Somerset, TX 78069 | Oil Operator | Mar 2025 |
| 11 | Petrolero Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 1998 |
| 12 | Petroleum Capital, L.C. | Dallas, TX 75367 | Oil & Gas Operator | Mar 2025 |
| 13 | Petronomics Petroleum, Inc. | Austin, TX 78734 | Oil & Gas Operator | Jan 1995 |
| 14 | Petrosaurus, Inc. | Somerset, TX 78069 | Oil Operator | Mar 2025 |
| 15 | Phillips 66 Company | Bartlesville, OK 74004 | Oil & Gas Operator | Aug 1997 |
| 16 | Phoenix Fund, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2000 |
| 17 | Phoenix Oil & Gas, Inc. (A) | Canada, 00100 | Oil & Gas Operator | Oct 2005 |
| 18 | Phylko Energy Corporation | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 19 | Pillar Efs, LLC | Dallas, TX 75204 | Oil & Gas Operator | Mar 2025 |
| 20 | Pintex Operating Inc. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Feb 2005 |
| 21 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | Mar 2025 |
| 22 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 23 | Plains Marketing, LP | Cushing, OK 74023 | Oil & Gas Operator | Dec 2022 |
| 24 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 25 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2025 |
| 26 | Pressly Oil Interest, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 27 | Preston, John WM. | Houston, TX 77004 | Oil & Gas Operator | May 2004 |
| 28 | Production Resources, Inc. | Castroville, TX 78009 | Oil & Gas Operator | Mar 2025 |
| 29 | Property Development Group, Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Mar 2025 |
| 30 | Prospectors LTD., The | Somerset, TX 78069 | Oil & Gas Operator | Jun 2002 |
| 31 | Protege Energy III LLC | Houston, TX 77024 | Oil & Gas Operator | Sep 2024 |
| 32 | Pullin Lease Service, Inc. | Taft, TX 78390 | Oil & Gas Operator | Mar 2025 |
| 33 | Pyle Petroleum, Inc. | Tyler, TX 75703 | Oil & Gas Operator | Mar 2025 |
| 34 | Pyramid Energy Inc | San Antonio, TX 78216 | Oil & Gas Operator | Feb 2012 |