| 1 | P & M Petroleum Management LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 2 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 3 | Padco LLC | | Oil & Gas Operator | Mar 2023 |
| 4 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |
| 5 | Pape Oilfield Service Inc | | Oil & Gas Operator | Dec 2012 |
| 6 | Par Pacific Holdings Inc | | Oil & Gas Operator | Jun 2010 |
| 7 | Park Energy Petroleum LLC | | Oil Operator | Mar 2023 |
| 8 | Patara Oil & Gas LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2018 |
| 9 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 10 | PCR Operating LLC | | Oil & Gas Operator | Jul 2024 |
| 11 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Sep 2025 |
| 12 | Peakview Operating Company, LLC | | Oil & Gas Operator | Jul 2025 |
| 13 | Pelican Hill Oil & Gas, Inc. | Carlsbad, CA 92010 | Oil & Gas Operator | May 2013 |
| 14 | Peterson Energy Operating Inc | Loveland, CO 80537 | Oil & Gas Operator | Oct 2025 |
| 15 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 16 | Petro Mex Resources | | Oil & Gas Operator | Aug 2025 |
| 17 | Petro Operating Company LLC | | Oil & Gas Operator | Sep 2025 |
| 18 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 19 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Dec 2025 |
| 20 | Petrohunter Operating Company | | Oil & Gas Operator | Dec 2013 |
| 21 | Petroleum Energy Corp | | Oil & Gas Operator | Jul 2012 |
| 22 | Petroleum Exploration Company LTD Dba Petex | | Oil & Gas Operator | Sep 2025 |
| 23 | Petroleum Management LLC | Platteville, CO 80651 | Oil & Gas Operator | Mar 2011 |
| 24 | Petroleum Resource Management Corp | Denver, CO 80203 | Oil & Gas Operator | Oct 2025 |
| 25 | Petron Development Company | | Oil & Gas Operator | Sep 2020 |
| 26 | Petroshare Corporation | | Oil & Gas Operator | Jan 2024 |
| 27 | Petrox Resources Inc | Meeker, CO 81641 | Oil & Gas Operator | Oct 2025 |
| 28 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 29 | Piceance Energy LLC | | Oil & Gas Operator | Sep 2025 |
| 30 | Piland Resources | | Oil & Gas Operator | Mar 2022 |
| 31 | Pineland Operating Company, LLC | Dallas, TX 75231 | Oil & Gas Operator | Oct 2025 |
| 32 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 33 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Jun 2025 |
| 34 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 35 | Platinum Gas Properties LLC | | Gas Operator | Oct 2025 |
| 36 | Plug Nickel Oil Company Inc | | Oil & Gas Operator | Sep 2025 |
| 37 | Poc-I LLC | Casper, WY 82605 | Oil & Gas Operator | Oct 2025 |
| 38 | Polaris Production Opco LLC | | Oil & Gas Operator | Aug 2025 |
| 39 | Poncho Production Co | | Oil & Gas Operator | Jan 2022 |
| 40 | Prairie Operating Co LLC | | Oil & Gas Operator | Sep 2025 |
| 41 | Prairie Resources LLC | | Oil Operator | Oct 2025 |
| 42 | Pre Resources Inc | | Oil & Gas Operator | Jul 2016 |
| 43 | Presco Inc | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2020 |
| 44 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 45 | Production Management Inc | | Oil & Gas Operator | Oct 2006 |
| 46 | Pronghorn Operating LLC | | Oil & Gas Operator | Jan 2023 |
| 47 | Prospect Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 48 | Providence Operating LLC Dba Poco Operating | | Oil & Gas Operator | Sep 2025 |
| 49 | Prudent Resources LLC | Houston, TX 77042 | Oil & Gas Operator | Dec 2025 |
| 50 | Puckett Land Company | | Oil & Gas Operator | Dec 2020 |
| 51 | Puckett-Warren Oil Co | | Oil Operator | Dec 2004 |