| 1 | P & P Producing Inc | Midland, TX 79702 | Oil & Gas Operator | Feb 2015 |
| 2 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 3 | Pacific Enterprise Oil Co USA | Los Angeles, CA 90071-2005 | Oil & Gas Operator | Aug 2012 |
| 4 | Pal Kids Inc | Coronado, CA 92118 | Oil & Gas Operator | Nov 2000 |
| 5 | Paleo, Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2026 |
| 6 | Paluca Petroleum Inc | Holdenville, OK 74848 | Oil & Gas Operator | Nov 2025 |
| 7 | Panada Exploration, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 1996 |
| 8 | Panenergy Services Inc | Houston, TX 77525 | Oil & Gas Operator | May 2001 |
| 9 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | Feb 2026 |
| 10 | Park Avenue Exploration Corp | Oklahoma City, OK 73102-5604 | Oil & Gas Operator | Sep 2011 |
| 11 | Parker & Parsley Dev Co | Midland, TX 79702 | Oil & Gas Operator | Mar 2015 |
| 12 | Parker & Parsley Dev LP | Irving, TX 75039-3745 | Oil & Gas Operator | Mar 2015 |
| 13 | Passmore Robert W | Ada, OK 74820-5501 | Oil & Gas Operator | May 2022 |
| 14 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 15 | Payne W C Family Trust | Oklahoma City, OK 73116-9044 | Oil & Gas Operator | Mar 2015 |
| 16 | Pedestal Oil Company Inc | Oklahoma City, OK 73101-1522 | Oil & Gas Operator | May 2019 |
| 17 | Pennant Energy LLC | Oklahoma City, OK 73116 | Oil Operator | Dec 2024 |
| 18 | Pennmark Resources Company | Edmond, OK 73013 | Oil & Gas Operator | Nov 2025 |
| 19 | Petro Speed Inc | Norman, OK 73069-8116 | Oil & Gas Operator | Mar 2015 |
| 20 | Petro-Management Assoc., Inc. | Edmond, OK 73083-2346 | Oil & Gas Operator | Jun 2007 |
| 21 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 22 | Petrohawk Operating Company | Houston, TX 77056 | Oil & Gas Operator | Oct 2021 |
| 23 | Petroleum Investment Inc | Oklahoma City, OK 73118 | Oil & Gas Operator | Nov 1998 |
| 24 | Petroleum Resources Co | Wichita, KS 67206 | Oil & Gas Operator | May 2000 |
| 25 | Pheldon Oil Production Inc | Asher, OK 74826-2629 | Oil & Gas Operator | Nov 2025 |
| 26 | Pierce G R Oil Properties Inc | Oklahoma City, OK 73106 | Oil Operator | Feb 1999 |
| 27 | Pilgrim Brothers Oil | Tulsa, OK 74136 | Oil & Gas Operator | Feb 1992 |
| 28 | Pinnacle Corporation (The) | Broken Arrow, OK 74012 | Oil & Gas Operator | Nov 2014 |
| 29 | Pitco Production Company | Tulsa, OK 74170-2320 | Oil & Gas Operator | May 2013 |
| 30 | Pogo Producing Company LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 31 | Porter John B | Ketchum, OK 74349-0207 | Oil & Gas Operator | May 2000 |
| 32 | Portfolio Oil Corporation | Oklahoma City, OK 73119 | Oil & Gas Operator | May 2013 |
| 33 | Post Oak Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Jul 2013 |
| 34 | Prentice, Napier & Green, Inc. | Oklahoma City, OK 73142 | Oil & Gas Operator | Dec 2025 |
| 35 | Preston Carter Oil Company | Davis, OK 73030 | Oil & Gas Operator | Nov 2025 |
| 36 | Pricor-TRC Corporation | Mounds, OK 74047 | Oil & Gas Operator | May 2013 |
| 37 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | Feb 2026 |
| 38 | Primary Natural Resources III LLC | Tulsa, OK 74136-6351 | Oil & Gas Operator | Nov 2025 |
| 39 | Prime Energy Corp | Charleston, WV 25301-1707 | Oil & Gas Operator | Sep 2015 |
| 40 | Primexx Operating Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2024 |
| 41 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 42 | Prospective Investment & Trading | Scottsdale, AZ 85261-4190 | Oil & Gas Operator | Jun 2016 |
| 43 | Proven Reserves Management, Inc. | Dallas, TX 75370 | Oil & Gas Operator | Nov 2025 |
| 44 | Pruitt L Oil Properties | Oklahoma City, OK 73162-7758 | Oil & Gas Operator | Dec 2000 |
| 45 | Psec Inc | Tulsa, OK 74102-0871 | Oil & Gas Operator | Dec 2016 |