| 1 | P & M Petroleum Management, LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 2 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |
| 3 | Paladin Energy Partners LLC | | Oil & Gas Operator | Dec 2006 |
| 4 | Pancanadian Energy Resources Inc | | Oil & Gas Operator | Dec 2004 |
| 5 | Pape Oilfield Service Inc | | Oil & Gas Operator | Jul 2018 |
| 6 | Par Pacific Holdings Inc | | Oil & Gas Operator | Apr 2015 |
| 7 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 8 | PCR Operating LLC | | Oil & Gas Operator | Jul 2024 |
| 9 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Jul 2025 |
| 10 | Peterson Energy Operating Inc | | Oil & Gas Operator | Aug 2025 |
| 11 | Petro Operating Company LLC | | Oil & Gas Operator | Jul 2025 |
| 12 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 13 | Petroleum Energy Corp | | Oil & Gas Operator | Aug 2012 |
| 14 | Petroleum Management LLC | | Oil & Gas Operator | May 2011 |
| 15 | Petroshare Corporation | | Oil & Gas Operator | Jan 2024 |
| 16 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 17 | Pozo Resources, Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 18 | Prairie Operating Co LLC | | Oil & Gas Operator | Jul 2025 |
| 19 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Aug 2025 |
| 20 | Providence Operating LLC Dba Poco Operating | | Oil & Gas Operator | Jul 2025 |