| 1 | Eagle Road Oil LLC | | Oil & Gas Operator | Jan 2024 |
| 2 | Earl Oil Inc | Stillwater, OK 74074-1079 | Oil & Gas Operator | Feb 2024 |
| 3 | Earth Oil Inc | Skiatook, OK 74070-0578 | Oil & Gas Operator | Oct 2008 |
| 4 | Ecc Energy Corporation | Dewey, OK 74029 | Oil & Gas Operator | Feb 2020 |
| 5 | Eclipse Production Company | Bartlesville, OK 74003 | Oil Operator | Nov 2005 |
| 6 | Eddings Steve L | Osage, OK 74054 | Oil & Gas Operator | Jul 2022 |
| 7 | El Paso Production Company | Houston, TX 77002 | Oil & Gas Operator | Mar 2016 |
| 8 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Feb 2024 |
| 9 | Elmore Stanley G | | Oil & Gas Operator | Sep 2023 |
| 10 | Emerson Oil Company | Rindge, NH 03461 | Oil & Gas Operator | Feb 2008 |
| 11 | Emery Edward A | Tulsa, OK 74145-7921 | Oil Operator | Jan 2024 |
| 12 | Endicott Melvin F | Ponca City, OK 74601 | Oil & Gas Operator | Apr 2001 |
| 13 | Enerco Energy Corporation | Norman, OK 73069-6643 | Oil & Gas Operator | Apr 2020 |
| 14 | Energas Corporation | Oklahoma City, OK 73105-6422 | Oil & Gas Operator | Jan 2024 |
| 15 | Energy Lease Service Inc | Drumright, OK 74030-7403 | Oil & Gas Operator | Jan 2024 |
| 16 | Ensight Energy Group Inc | Richardson, TX 75080-2370 | Oil & Gas Operator | Dec 2023 |
| 17 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 18 | Eott Energy Operating LP | Houston, TX 77210-4666 | Oil & Gas Operator | Oct 2009 |
| 19 | Epperson John R | Bartlesville, OK 74003 | Oil Operator | Aug 1999 |
| 20 | Equinox Oil Company | Plainville, KS 67663 | Oil & Gas Operator | Jan 2024 |
| 21 | Equity Drilling Company Inc | Dewey, OK 74029 | Oil & Gas Operator | Nov 1998 |
| 22 | Erwin Oil & Gas LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Apr 2019 |
| 23 | Esco Exploration, Inc | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 24 | Esis Inc | | Oil & Gas Operator | Feb 2017 |
| 25 | Evans / Heslet Operating | Tulsa, OK 74170 | Oil & Gas Operator | Aug 1999 |
| 26 | Eyler Corporation | | Oil & Gas Operator | Nov 2012 |
| 27 | Eyler Dean E | Cleveland, OK 74020-0260 | Oil & Gas Operator | Jan 2024 |