| 1 | Ea Petroleum Inc | Norman, OK 73072-4147 | Oil & Gas Operator | May 2006 |
| 2 | Eagle Energy Production LLC | Tulsa, OK 74136-1935 | Oil & Gas Operator | Mar 2020 |
| 3 | Eagle Minerals & Oil Prop Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2002 |
| 4 | Eagle Operating Company | Tulsa, OK 74146-5730 | Oil & Gas Operator | Aug 2020 |
| 5 | Eagle Resources Inc | Claremore, OK 74019-5398 | Oil & Gas Operator | May 2013 |
| 6 | Eagle River Energy Corporation | Broken Arrow, OK 74011 | Oil & Gas Operator | Nov 2024 |
| 7 | Eagle Road Oil LLC | Tulsa, OK 74103-3312 | Oil & Gas Operator | Nov 2024 |
| 8 | Earl Oil Inc | Stillwater, OK 74074-1079 | Oil & Gas Operator | Nov 2024 |
| 9 | Earl-Le Oil Company | Bristow, OK 74010-9547 | Oil & Gas Operator | Nov 2024 |
| 10 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Oct 2024 |
| 11 | Edge Oil Company Inc | Cleveland, OK 74020-0284 | Oil & Gas Operator | Feb 2024 |
| 12 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Dec 2024 |
| 13 | Edmonds Management Company | Richardson, TX 75081 | Oil & Gas Operator | Mar 2015 |
| 14 | Eec Inc | Norman, OK 73069-6344 | Oil & Gas Operator | Dec 2024 |
| 15 | Egret Operating Company | Muskogee, OK 74401 | Oil & Gas Operator | Nov 2024 |
| 16 | Eig Petroleum LLC | Asheville, NC 28803-2908 | Oil Operator | Aug 2015 |
| 17 | Ekg Operating Inc | Seminole, OK 74818-1028 | Oil & Gas Operator | Nov 2015 |
| 18 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Dec 2024 |
| 19 | Elco Resources LLC | Owasso, OK 74055-7575 | Oil & Gas Operator | Dec 2024 |
| 20 | Elite Resources Inc | Cleveland, OK 74020 | Oil & Gas Operator | Dec 2024 |
| 21 | Elite Tank Trucks, Inc | | Oil & Gas Operator | Dec 2024 |
| 22 | Emerald Operating Company | Plano, TX 75075 | Oil & Gas Operator | Jan 2025 |
| 23 | Emmaus Energy LLC | Tulsa, OK 74137 | Oil & Gas Operator | Nov 2024 |
| 24 | Emo Inc | Eufaula, OK 74432-0841 | Oil & Gas Operator | Apr 2020 |
| 25 | Empire Petroleum Company | Houston, TX 77044 | Oil Operator | Mar 2011 |
| 26 | Enerfin Resources I Limited Partnership | Houston, TX 77077-2386 | Oil & Gas Operator | Apr 2023 |
| 27 | Energex Corp | Springfield, MO 65807 | Oil & Gas Operator | Nov 2024 |
| 28 | Energex Inc. | Abilene, TX 79604 | Oil & Gas Operator | Mar 2025 |
| 29 | Energy Lease Service Inc | Drumright, OK 74030-7403 | Oil & Gas Operator | Nov 2024 |
| 30 | Energy Resources Dev Inc | Bixby, OK 74008-3658 | Oil & Gas Operator | Nov 2024 |
| 31 | Enersearch Inc | Sand Springs, OK 74063 | Oil & Gas Operator | Dec 2013 |
| 32 | Enersource Petroleum Inc | Bixby, OK 74008 | Oil & Gas Operator | Nov 2024 |
| 33 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 34 | Enhanced Hydrocarbons Inc | Claremore, OK 74017 | Oil & Gas Operator | May 2013 |
| 35 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 36 | Enterprise Energy Exploration Inc | Tulsa, OK 74133-6724 | Oil & Gas Operator | Dec 2024 |
| 37 | Enterprise Exploration Inc | Tulsa, OK 74133 | Oil & Gas Operator | Nov 2020 |
| 38 | Enterprising Enterprises Inc | Tulsa, OK 74137 | Oil Operator | Jun 2009 |
| 39 | Eott Energy Operating LP | Houston, TX 77210-4666 | Oil & Gas Operator | Oct 2009 |
| 40 | Ernst Petroleum Company Inc | Arlington, VA 22201 | Oil & Gas Operator | Aug 2013 |
| 41 | Esenjay Exploration, Inc | Houston, TX 77042 | Oil & Gas Operator | Nov 2024 |
| 42 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 43 | Eslick Nancy Sue | Bristow, OK 74010-3873 | Oil Operator | Aug 2013 |
| 44 | Excel Operating Inc | Dallas, TX 75234-7300 | Oil & Gas Operator | Jun 2022 |
| 45 | Excel Production Inc | Lubbock, TX 79424-2341 | Oil Operator | Apr 2020 |
| 46 | Exok, Inc. | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2024 |
| 47 | Explo Oil, Inc. | Dallas, TX 75251 | Oil & Gas Operator | Mar 2025 |
| 48 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 49 | Eyler Corporation | | Oil & Gas Operator | Nov 2012 |
| 50 | Eyler Dean E | Cleveland, OK 74020 | Oil & Gas Operator | Nov 2024 |
| 51 | Eyler Nelson E | | Oil Operator | Nov 1998 |