| 2001 | Putnam, Joe Oil Company | Abilene, TX 79606 | Oil & Gas Operator | May 2024 |
| 2002 | Putnam, Paul Oil | Orla, TX 79770 | Oil & Gas Operator | May 2024 |
| 2003 | Putnam, William H | Marietta, OH 45750 | Oil & Gas Operator | Dec 2022 |
| 2004 | PV Of MS Inc | | Oil & Gas Operator | Jan 2019 |
| 2005 | PV Oil Services, LLC | Abilene, TX 79601 | Oil & Gas Operator | May 2024 |
| 2006 | Pve Oil Corp Inc | Blairsville, PA 15717-7961 | Oil & Gas Operator | Dec 2023 |
| 2007 | PVR Gas Processing LLC | | Oil & Gas Operator | Feb 2015 |
| 2008 | PWR Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | May 2024 |
| 2009 | PXP Gulf Coast Inc. | Houston, TX 77002 | Oil & Gas Operator | Mar 2015 |
| 2010 | PXP Gulf Coast LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2004 |
| 2011 | PXP Louisiana L.L.C. | | Oil & Gas Operator | Nov 2010 |
| 2012 | PXP Texas Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2007 |
| 2013 | Pybas Robert | Wanette, OK 74878 | Oil Operator | Apr 2014 |
| 2014 | Pyle Petroleum | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Dec 1996 |
| 2015 | Pyle Petroleum, Inc. | Tyler, TX 75703 | Oil & Gas Operator | May 2024 |
| 2016 | Pyote Disposal Company | Pyote, TX 79777 | Oil Operator | May 2024 |
| 2017 | Pyramid Corporat | | Oil & Gas Operator | Aug 1995 |
| 2018 | Pyramid Energy Inc | San Antonio, TX 78216 | Oil & Gas Operator | Feb 2012 |
| 2019 | Pyramid Enterprises | Muenster, TX 76252 | Oil & Gas Operator | May 2024 |
| 2020 | Pyramid Exploration | Houston, TX 77241 | Oil & Gas Operator | Sep 1995 |
| 2021 | Pyramid Gas Co | Midland, TX 79707 | Oil Operator | May 2024 |
| 2022 | Pyramid Oil Co. | Litchfield PK, AZ 85340 | Oil & Gas Operator | Jan 2018 |
| 2023 | Pyramid Oil Of America, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2024 |
| 2024 | Pyramid Petroleum, Inc. | | Oil & Gas Operator | May 1992 |
| 2025 | Pyramid Petroleum, Inc.-La Div | | Oil Operator | Jun 1997 |
| 2026 | Pyramid Production Co. | Abilene, TX 79608 | Oil & Gas Operator | Jun 1994 |
| 2027 | Pyro Energy Corp | Kingwood, TX 77339-2102 | Oil & Gas Operator | Mar 1998 |
| 2028 | Pywell Venture A | | Oil Operator | Apr 1988 |