| 1 | E2 Operating LLC | Tulsa, OK 74114 | Oil & Gas Operator | Apr 2024 |
| 2 | Ea Petroleum Inc | Norman, OK 73072-4147 | Oil & Gas Operator | May 2006 |
| 3 | Eagle Energy Production LLC | | Oil & Gas Operator | Mar 2020 |
| 4 | Eagle Minerals & Oil Prop Inc | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2002 |
| 5 | Eagle Minerals Inc | Tulsa, OK 74119 | Oil Operator | Jun 1998 |
| 6 | Eagle Resources Inc | Claremore, OK 74019-5398 | Oil & Gas Operator | May 2013 |
| 7 | Earl Oil Inc | Stillwater, OK 74074-1079 | Oil & Gas Operator | Feb 2024 |
| 8 | Earlsboro Energies Corporation | Oklahoma City, OK 73116-3605 | Oil & Gas Operator | Jan 2024 |
| 9 | Eastok Energy Partners LLC | | Oil & Gas Operator | Jan 2024 |
| 10 | Eddie'S Submersible Service Inc | Shawnee, OK 74801-5047 | Oil & Gas Operator | Mar 2015 |
| 11 | Edge Oil Company Inc | Cleveland, OK 74020-0284 | Oil & Gas Operator | Dec 2023 |
| 12 | Edinger Engineering, Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2024 |
| 13 | Edinger Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Jun 2007 |
| 14 | Edmonds Management Company | Richardson, TX 75081 | Oil & Gas Operator | Mar 2015 |
| 15 | Edwards & Leach Oil Company | Oklahoma City, OK 73114 | Oil & Gas Operator | Mar 2005 |
| 16 | Edwards Timothy D | Broken Arrow, OK 74014-4052 | Oil & Gas Operator | Apr 2015 |
| 17 | Egan Resources Inc. | Katy, TX 77494 | Oil & Gas Operator | Oct 2016 |
| 18 | Egret Operating Company | Muskogee, OK 74402-1871 | Oil & Gas Operator | Jan 2024 |
| 19 | Elint Operating Inc | Oklahoma City, OK 73106 | Oil & Gas Operator | May 1995 |
| 20 | Emde & McNeil | Carney, OK 74832 | Oil & Gas Operator | Nov 1998 |
| 21 | Emmaus Energy LLC | | Oil & Gas Operator | Aug 2022 |
| 22 | Energy Development Corporation | Houston, TX 77067 | Oil & Gas Operator | Dec 2023 |
| 23 | Energy Lease Service Inc | Drumright, OK 74030-7403 | Oil & Gas Operator | Jan 2024 |
| 24 | Energy Operations Oklahoma LP | Houston, TX 77002-6785 | Oil & Gas Operator | Nov 2010 |
| 25 | Enersource Petroleum Inc | Bixby, OK 74008-1000 | Oil & Gas Operator | Jan 2024 |
| 26 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 27 | EOG (Oklahoma) Inc. | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2016 |
| 28 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 29 | Eok Operating LLC | | Oil & Gas Operator | Jan 2024 |
| 30 | Epoch Resources Of Texas Inc | Port Aransas, TX 78373-1637 | Oil & Gas Operator | Nov 2014 |
| 31 | Equal Energy Us Inc | | Oil & Gas Operator | Nov 2019 |
| 32 | Ernst Petroleum Company Inc | Arlington, VA 22201 | Oil & Gas Operator | Aug 2013 |
| 33 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 34 | Excel Operating Inc | Dallas, TX 75234-7300 | Oil & Gas Operator | Jun 2022 |
| 35 | Excelco Energy Inc. | Kingwood, TX 77339 | Oil & Gas Operator | Jul 2018 |
| 36 | Exok, Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Jan 2024 |
| 37 | Express Oil & Gas LLC | | Oil & Gas Operator | Jan 2024 |
| 38 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |