| 1 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 2 | Pacific Enterprises Oil Co. (USA) | Dallas, TX 75201 | Oil & Gas Operator | Feb 2001 |
| 3 | Palace Exploration Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2007 |
| 4 | Pan-Ok Production Company | | Oil & Gas Operator | Nov 2024 |
| 5 | Parker & Parsley Devpt L P | | Oil & Gas Operator | Oct 1997 |
| 6 | Parker & Parsley Producing L.P. | Midland, TX 79702 | Oil & Gas Operator | Oct 1997 |
| 7 | Paul E. Cameron, Jr., Inc. | | Oil & Gas Operator | May 2003 |
| 8 | Pel-Tex Oil Company, Inc. | | Oil & Gas Operator | Jul 1995 |
| 9 | Petro "E", LLC | | Oil & Gas Operator | Feb 2010 |
| 10 | Petro Ventures Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2019 |
| 11 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 12 | Petrodome Operating, LLC | Houston, TX 77265 | Oil & Gas Operator | Jun 2025 |
| 13 | Petroleum Exchange | | Oil & Gas Operator | Oct 1997 |
| 14 | Petroleum Resources MGMT Corp. | | Oil & Gas Operator | Mar 2002 |
| 15 | Petroquest Energy, Inc. | Lafayette, LA 70505 | Oil & Gas Operator | Feb 2001 |
| 16 | Petroquest Energy, L.L.C. | Lafayette, LA 70505 | Oil & Gas Operator | Oct 2025 |
| 17 | Petrus Oil Company., L.P. | | Oil & Gas Operator | Dec 1989 |
| 18 | Petrus Operating Co., Inc. | | Oil & Gas Operator | Dec 1986 |
| 19 | Phalanx Petroleum LLC | | Oil & Gas Operator | Jan 2025 |
| 20 | Phillips Oil Company | Casper, WY 82602 | Oil & Gas Operator | Sep 1986 |
| 21 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 22 | Phoenix Oil & Gas LTD., L.L.P. | Houston, TX 77010 | Oil & Gas Operator | Jun 2004 |
| 23 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Jul 2025 |
| 24 | Pioneer Exploration, LLC | Houston, TX 77090 | Oil & Gas Operator | Aug 2025 |
| 25 | Pioneer Exploration, LTD. | Houston, TX 77090 | Oil & Gas Operator | Sep 2008 |
| 26 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Jun 2025 |
| 27 | Pioneer Prod. Corp. | | Oil & Gas Operator | Jun 1986 |
| 28 | Pioneer Resources Producing, L.P | Irving, TX 75039 | Oil & Gas Operator | Feb 2001 |
| 29 | Pledger West Broussard Operating, LLC | | Oil & Gas Operator | Dec 2024 |
| 30 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 31 | Power Reserves, Inc. | | Oil Operator | Feb 1999 |
| 32 | Prayer Oil & Gas Production, LLC | Hallsville, TX 75650 | Oil & Gas Operator | Oct 2025 |
| 33 | Precision Holdings, LLC | | Oil & Gas Operator | Dec 2015 |
| 34 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 35 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 36 | Prospective Investment & Trding Co LTD | | Oil & Gas Operator | Sep 2012 |