| 701 | Occidental W TX Overthrust, Inc. | Houston, TX 77210 | Oil & Gas Operator | Dec 2021 |
| 702 | Odessa Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 703 | Ogog Operating, LLC | Dallas, TX 75367 | Oil & Gas Operator | May 2025 |
| 704 | Oil-X Corp., The | FT Stockton, TX 79735 | Oil & Gas Operator | May 2025 |
| 705 | Oilex Int'L Investments, Inc. | Luling, TX 78648 | Oil & Gas Operator | May 2025 |
| 706 | Oklahoma Operating Company | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 707 | Olsen Energy Inc. | Boerne, TX 78006 | Oil & Gas Operator | May 2025 |
| 708 | Omar Operating Company | Midland, TX 79702 | Oil & Gas Operator | Sep 2013 |
| 709 | On Pointe Operating LLC | Jones, OK 73049 | Oil & Gas Operator | May 2025 |
| 710 | Orbit Crude, Inc. | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 711 | Ormand, Don R. | Midland, TX 79705 | Oil & Gas Operator | Jan 2016 |
| 712 | Orr Production Company | Austin, TX 78746 | Oil & Gas Operator | Dec 2000 |
| 713 | Orr, Robert M. | Monahans, TX 79756 | Oil & Gas Operator | Oct 1998 |
| 714 | Oryx Energy Company | Dallas, TX 75221 | Oil & Gas Operator | May 2002 |
| 715 | Osborn Heirs Co | San Antonio, TX 78217 | Oil & Gas Operator | Mar 2025 |
| 716 | Ouut Investing LLC | Mineral Wells, TX 76068 | Oil Operator | Mar 2020 |
| 717 | Overstreet, Jamie L | Hondo, TX 78861 | Oil & Gas Operator | May 2025 |
| 718 | Oxbow Petroleum, LLC | Midland, TX 79703 | Oil & Gas Operator | May 2025 |
| 719 | Oxford Exploration Company | Denver, CO 80237 | Oil & Gas Operator | Aug 1995 |
| 720 | Oxy USA Inc | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 721 | Oxy USA WTP LP | Houston, TX 77046 | Oil & Gas Operator | May 2025 |
| 722 | Ozark Exploration, Inc. | Dallas, TX 75205 | Oil & Gas Operator | May 2025 |
| 723 | P.O.&G. Operating, LLC | Houston, TX 77057 | Oil & Gas Operator | May 2025 |
| 724 | P4 Operating, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 725 | Pa Prospect LLC | Columbus, MT 59019 | Oil & Gas Operator | Jul 2020 |
| 726 | Page Exploration | Midland, TX 79701 | Oil & Gas Operator | Apr 2007 |
| 727 | Palmer, J. M. | Keller, TX 76244 | Oil & Gas Operator | Aug 2009 |
| 728 | Palo Petroleum Inc | Dallas, TX 75360 | Oil & Gas Operator | May 2025 |
| 729 | Panada Exploration, Inc. | Tulsa, OK 74135 | Oil & Gas Operator | Jun 1996 |
| 730 | Pangea Corporation | San Angelo, TX 76904 | Oil & Gas Operator | May 2025 |
| 731 | Panhandle Oil & Gas Inc | Oklahoma City, OK 73112-5688 | Oil & Gas Operator | May 2007 |
| 732 | Pantera Energy Company | Amarillo, TX 79101 | Oil & Gas Operator | May 2025 |
| 733 | Parallel Petroleum Corporation | Midland, TX 79702 | Oil & Gas Operator | Jan 2010 |
| 734 | Parallel Petroleum LLC | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 735 | Parker & Parsley Development Co. | Midland, TX 79702 | Oil & Gas Operator | May 1995 |
| 736 | Parker & Parsley Development L.P | Midland, TX 79702 | Oil & Gas Operator | Oct 2007 |
| 737 | Parsley Energy Operations, LLC | Irving, TX 75038 | Oil & Gas Operator | Jan 2021 |
| 738 | Partee Drilling Inc. | Big Spring, TX 79721 | Oil & Gas Operator | May 2025 |
| 739 | Patriot Resources, Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2017 |
| 740 | Patterson Petroleum LP | Snyder, TX 79550 | Oil & Gas Operator | Mar 2008 |
| 741 | Patterson Petroleum, Inc. | Snyder, TX 79550 | Oil & Gas Operator | Feb 2000 |
| 742 | Patton, E. N. Oil Company, Inc. | Abilene, TX 79604 | Oil & Gas Operator | May 2025 |
| 743 | Pcore Exploration & Prod II LLC | Golden, CO 80401 | Oil & Gas Operator | Jun 2020 |
| 744 | Pearl Resources Operating Co.LLC | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 745 | Pecos Crude LLC | Sugar Land, TX 77479 | Oil Operator | May 2025 |
| 746 | Pecos Production Company | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2005 |
| 747 | Pecos River Exploration, LLC | Allen, TX 75013 | Oil & Gas Operator | May 2025 |
| 748 | Ped Oil Corporation | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 749 | Pedco Resources Company | Tulsa, OK 74170 | Oil & Gas Operator | Mar 2008 |
| 750 | Pedeco, Inc. | Casper, WY 82601 | Oil & Gas Operator | Mar 2008 |
| 751 | Pembrook Oil Company | Big Lake, TX 76932 | Oil & Gas Operator | May 1999 |
| 752 | Penn VIrginia Oil & Gas Corp | Houston, TX 77024 | Oil & Gas Operator | Dec 2023 |
| 753 | Pennzoil Exploration & Production Co. | Carthage, TX 75633 | Oil & Gas Operator | Mar 2008 |
| 754 | Pennzoil Petroleum Company | Houston, TX 77252 | Oil & Gas Operator | Nov 1999 |
| 755 | Peregrine Petroleum PRTNR, LTD. | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 756 | Performance Operating Partners, LLC | Shreveport, LA 71164 | Oil & Gas Operator | May 2025 |
| 757 | Perimeter Resource Company | Midland, TX 79702 | Oil & Gas Operator | May 2025 |
| 758 | Periscope Operating LLC | McKinney, TX 75069 | Oil & Gas Operator | Jun 2020 |
| 759 | Permian Resources Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 760 | Permian Resources, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 761 | Peterson Oil And Gas LLC | Wichita Falls, TX 76310 | Oil & Gas Operator | May 2025 |
| 762 | Petex | Breckenridge, TX 76424 | Oil & Gas Operator | May 2025 |
| 763 | Petro-Hunt, L.L.C. | Dallas, TX 75201 | Oil & Gas Operator | May 2025 |
| 764 | Petrolero, LLC | Plano, TX 75026 | Oil & Gas Operator | May 2025 |
| 765 | Petroleum Technical Services Co. | Midland, TX 79707 | Oil & Gas Operator | Dec 2004 |
| 766 | Petrolia Group, L.L.C. | Katy, TX 77449 | Oil & Gas Operator | May 2025 |
| 767 | Petx Operating LLC | Sheridan, WY 82801 | Oil & Gas Operator | May 2025 |
| 768 | PF Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Aug 2003 |
| 769 | PG&E Resources Company | Houston, TX 77042 | Oil & Gas Operator | May 1995 |
| 770 | Pharaoh Oil & Gas, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | May 2025 |
| 771 | Phillips Petroleum Company | Houston, TX 77251 | Oil & Gas Operator | Mar 2013 |
| 772 | Phoenix Hydrocarbons Operating | Midland, TX 79702 | Oil & Gas Operator | Jun 2024 |
| 773 | Piedra Operating, LLC | Denver, CO 80202 | Oil & Gas Operator | May 2023 |
| 774 | Pillar Energy, LLC | Charleston, WV 25312-5987-5987 | Oil & Gas Operator | Dec 2024 |
| 775 | Pinnacle Mining Corporation | Midland, TX 79708 | Oil & Gas Operator | May 2025 |
| 776 | Pioneer Exploration Company | Houston, TX 77090 | Oil & Gas Operator | Mar 2025 |
| 777 | Pioneer Natural Res. USA, Inc. | Irving, TX 75038 | Oil & Gas Operator | May 2025 |
| 778 | Pitco Investments, LTD. | Scottsdale, AZ 85261 | Oil & Gas Operator | Jan 2013 |
| 779 | Pitts Energy Co. | Midland, TX 79707 | Oil & Gas Operator | May 2025 |
| 780 | Plains Marketing, LP | Cushing, OK 74023 | Oil Operator | Jan 2012 |
| 781 | Plains Petroleum Operating Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2014 |
| 782 | Plains Production Inc | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 783 | Plateau Energy, LLC | Smyer, TX 79367 | Oil & Gas Operator | Dec 2023 |
| 784 | Pogo Panhandle 2004, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2017 |
| 785 | Pogo Producing Company | Houston, TX 77002 | Oil & Gas Operator | Jan 2008 |
| 786 | Porosity Oil LLC | Imperial, TX 79743 | Oil Operator | May 2025 |
| 787 | Portana Properties LLC | McKinney, TX 75072 | Oil Operator | May 2025 |
| 788 | PPC Operating Company LLC | Houston, TX 77279 | Oil & Gas Operator | Jul 2019 |
| 789 | Praxis Oil And Gas, LLC | Miami, FL 33145 | Oil Operator | May 2025 |
| 790 | Preferred Pipeline Corp. | Victoria, TX 77902 | Oil & Gas Operator | Apr 2025 |
| 791 | Premier Natural Resources, L.P. | Tulsa, OK 74105 | Oil & Gas Operator | Feb 2007 |
| 792 | Premier Natural Resources, LLC | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 793 | Pri Operating, LLC | Austin, TX 78730 | Oil & Gas Operator | May 2025 |
| 794 | Prickett Operating Company | Wichita Falls, TX 76302 | Oil & Gas Operator | Mar 2008 |
| 795 | Pride Energy Company | Tulsa, OK 74170 | Oil & Gas Operator | May 2025 |
| 796 | Primal Energy Corporation | The Woodlands, TX 77380 | Oil & Gas Operator | May 2025 |
| 797 | Prime Operating Company | Houston, TX 77024 | Oil & Gas Operator | May 2025 |
| 798 | Primexx Operating Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2024 |
| 799 | Prize Operating Company | Grapevine, TX 76051 | Oil & Gas Operator | Aug 2016 |
| 800 | Production Management Associates | Plano, TX 75075 | Oil & Gas Operator | May 2025 |