| 1 | P & C Oil Company | Leona, TX 75850 | Oil & Gas Operator | Sep 2025 |
| 2 | Pace Diversified Corporation | | Oil & Gas Operator | Sep 2025 |
| 3 | Pacific Energy Resources Inc. | | Oil Operator | Sep 2025 |
| 4 | Pacific Energy Resources LTD | | Oil & Gas Operator | Sep 2009 |
| 5 | Pan American Energy Corporation | | Oil & Gas Operator | Dec 1998 |
| 6 | Pancanadian Petroleum Company | | Oil & Gas Operator | Oct 1989 |
| 7 | Parlay Oil Company | | Oil Operator | Dec 2002 |
| 8 | Paul M. Woodward | | Oil Operator | Sep 2025 |
| 9 | Pennant Petroleum Corporation | | Oil Operator | Dec 2002 |
| 10 | Petro Capital Resources LLC | | Oil & Gas Operator | Sep 2025 |
| 11 | Petro Resources, Inc. | Fulton, TX 78358 | Oil & Gas Operator | Dec 2025 |
| 12 | Petro-Lewis Corp. | | Oil & Gas Operator | Feb 1994 |
| 13 | Petro-Lud Inc. | | Oil & Gas Operator | Oct 2025 |
| 14 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 15 | Petrojen Production Company Inc | Bakersfield, CA 93311 | Oil Operator | Sep 2025 |
| 16 | Petropro Energy Partners, L.P. | Houston, TX 77024 | Oil & Gas Operator | Jan 2013 |
| 17 | Petrowest | | Oil & Gas Operator | Dec 2001 |
| 18 | Philip R. McPharlin | | Oil & Gas Operator | Dec 1995 |
| 19 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 20 | Pine Meadows Ranch Incorporated | | Oil & Gas Operator | Dec 2001 |
| 21 | Polaris Production Inc. | | Oil & Gas Operator | Feb 2021 |
| 22 | Pool California Energy Services Inc. | | Oil Operator | Dec 2009 |
| 23 | Portals Woodward Joint Venture | | Oil Operator | Dec 2000 |
| 24 | Poso Creek Energy LLC | | Oil & Gas Operator | Dec 2009 |
| 25 | Powerdrive Energy Services Company LLC | | Oil & Gas Operator | Oct 2025 |
| 26 | Premier Pumping Unit Services Inc. | | Oil & Gas Operator | Sep 2025 |
| 27 | Preuitt Production Service | | Oil Operator | Sep 2025 |
| 28 | Princeton Natural Gas LLC | | Gas Operator | Sep 2025 |
| 29 | Production Specialties Company | | Oil & Gas Operator | Dec 2003 |
| 30 | Protho Energy Service LLC | | Oil & Gas Operator | Oct 2025 |
| 31 | Pyramid Oil Co. | Litchfield PK, AZ 85340 | Oil & Gas Operator | Jan 2018 |