| Company Name | Company Location | Company Type | Most Recent Production | |
|---|---|---|---|---|
| 1 | Pancanadian Energy Resources Inc | Oil & Gas Operator | Dec 2004 | |
| 2 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 3 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Feb 2024 |
| 4 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 5 | Petroleum Management LLC | Platteville, CO 80651 | Oil & Gas Operator | May 2011 |
| 6 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |