| 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 | Oct 2025 |
| 3 | Padco LLC | | Oil & Gas Operator | Mar 2025 |
| 4 | Painted Pegasus Petroleum LLC | | Oil & Gas Operator | Jul 2024 |
| 5 | Paladin Energy Partners LLC | | Oil & Gas Operator | Dec 2006 |
| 6 | Pan American Petroleum Corp | | Oil & Gas Operator | Jan 2008 |
| 7 | Pancanadian Energy Resources Inc | | Oil & Gas Operator | Dec 2004 |
| 8 | Pape Oilfield Service Inc | | Oil & Gas Operator | Jul 2018 |
| 9 | Par Pacific Holdings Inc | | Oil & Gas Operator | Apr 2015 |
| 10 | Patara Oil & Gas LLC | Dallas, TX 75219 | Oil & Gas Operator | Mar 2018 |
| 11 | Patina Oil & Gas Corporation | Denver, CO 80202 | Oil & Gas Operator | May 2016 |
| 12 | PCR Operating LLC | | Oil & Gas Operator | Jul 2024 |
| 13 | PDC Energy Inc | Denver, CO 80203 | Oil & Gas Operator | Jul 2025 |
| 14 | Peakview Operating Company, LLC | | Oil & Gas Operator | Jun 2025 |
| 15 | Pelican Hill Oil & Gas Inc | Carlsbad, CA 92010 | Oil & Gas Operator | May 2013 |
| 16 | Peterson Energy Operating Inc | | Oil & Gas Operator | Aug 2025 |
| 17 | Petra Oleum Corp. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 18 | Petro Mex Resources | | Oil & Gas Operator | Aug 2025 |
| 19 | Petro Operating Company LLC | | Oil & Gas Operator | Jul 2025 |
| 20 | Petro-Canada Resources (USA) Inc | Denver, CO 80202-472 | Oil & Gas Operator | Feb 2010 |
| 21 | Petrocorp Incorporated | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2021 |
| 22 | Petrogulf Corporation | Denver, CO 80202 | Oil & Gas Operator | Oct 2025 |
| 23 | Petroleum Energy Corp | | Oil & Gas Operator | Aug 2012 |
| 24 | Petroleum Exploration Company LTD Dba Petex | | Oil Operator | Aug 2025 |
| 25 | Petroleum Inc | Wichita, KS 67202 | Oil & Gas Operator | Oct 2021 |
| 26 | Petroleum Management LLC | | Oil & Gas Operator | May 2011 |
| 27 | Petroleum Resource Management Corp. | | Oil & Gas Operator | Aug 2025 |
| 28 | Petron Development Company | | Oil & Gas Operator | Oct 2020 |
| 29 | Petroshare Corporation | | Oil & Gas Operator | Jan 2024 |
| 30 | Petrox Resources Inc. | Meeker, CO 81641 | Oil & Gas Operator | Aug 2025 |
| 31 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 32 | Phoenix Resources LLC | Longview, TX 75604 | Oil & Gas Operator | Jul 2022 |
| 33 | Piceance Energy LLC | | Oil & Gas Operator | Jul 2025 |
| 34 | Piceance Operating Company LLC | | Gas Operator | Oct 2006 |
| 35 | Piland Resources | | Oil & Gas Operator | Mar 2022 |
| 36 | Pine Ridge Oil & Gas LLC | | Oil & Gas Operator | Jul 2015 |
| 37 | Pineland Operating Company LLC | Dallas, TX 75231 | Oil & Gas Operator | Jul 2025 |
| 38 | Pintail Petroleum, LTD. | Wichita, KS 67202 | Oil & Gas Operator | Apr 2021 |
| 39 | Pioneer Natural Resources USA Inc | Irving, TX 75039 | Oil & Gas Operator | Jun 2025 |
| 40 | Pioneer Oil & Gas | South Jordan, UT 84095 | Oil & Gas Operator | Jan 2014 |
| 41 | Plains Exploration & Prod. Co. | Houston, TX 77002 | Oil & Gas Operator | Jul 2013 |
| 42 | Plains Petroleum Operating Co. | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 43 | Platinum Gas Properties LLC | | Gas Operator | Aug 2025 |
| 44 | Plug Nickel Oil Company Inc | | Oil & Gas Operator | Jul 2025 |
| 45 | Poc-I LLC | | Oil Operator | Aug 2025 |
| 46 | Polaris Production Opco LLC | | Oil & Gas Operator | Jul 2025 |
| 47 | Poncho Production Co | | Oil & Gas Operator | Jan 2022 |
| 48 | Pozo Resources, Inc | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 49 | Prairie Operating Co LLC | | Oil & Gas Operator | Jul 2025 |
| 50 | Premium Oil Co | | Oil & Gas Operator | Dec 2015 |
| 51 | Presco Inc | The Woodlands, TX 77380 | Oil & Gas Operator | Oct 2020 |
| 52 | Prima Exploration, Inc. | Denver, CO 80206 | Oil & Gas Operator | Aug 2025 |
| 53 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | Oct 2025 |
| 54 | Private Oil Industries Inc | | Oil & Gas Operator | Feb 2004 |
| 55 | Production Management Inc | | Oil & Gas Operator | Jul 2021 |
| 56 | Pronghorn Operating LLC | | Oil Operator | Jan 2023 |
| 57 | Prospect Energy LLC | | Oil & Gas Operator | Jan 2024 |
| 58 | Prospective Investment & Trading Co., LTD., The | Tulsa, OK 74170-2320 | Oil & Gas Operator | Apr 2014 |
| 59 | Providence Operating LLC Dba Poco Operating | | Oil & Gas Operator | Jul 2025 |
| 60 | Prudent Resources LLC | Houston, TX 77042 | Oil & Gas Operator | Oct 2025 |
| 61 | Puckett-Warren Oil Co | | Oil & Gas Operator | Dec 2007 |