| 1 | E & B Natural Resources Management | Guilderland Centek, NY 12085 | Oil & Gas Operator | Oct 2025 |
| 2 | Eagle Oil & Gas Co. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2025 |
| 3 | Earthstone Energy, Inc. | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2017 |
| 4 | Earthstone Operating, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Sep 2025 |
| 5 | Eason Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2012 |
| 6 | Eastern American Energy Corp | | Oil & Gas Operator | Dec 2008 |
| 7 | Eberspecher Drilling Inc | Casper, WY 82601 | Oil & Gas Operator | Dec 2000 |
| 8 | Eblen Frank Syndicate Inc | Atlantic, IA 50022 | Oil & Gas Operator | Jul 2014 |
| 9 | Edge Energy II LLC | Golden, CO 80401 | Oil & Gas Operator | Nov 2025 |
| 10 | Eex Corporation | Houston, TX 77060 | Oil & Gas Operator | Feb 2000 |
| 11 | El Paso Natural Gas Company | El Paso, TX 79978 | Oil & Gas Operator | Apr 2013 |
| 12 | El Paso Production Oil & Gas Co. | Houston, TX 77252 | Oil & Gas Operator | Dec 2025 |
| 13 | Eland Energy Inc | Dallas, TX 75248 | Oil & Gas Operator | Sep 2025 |
| 14 | Elephant Operating LLC | Dallas, TX 75204 | Oil & Gas Operator | Oct 2025 |
| 15 | Elf Aquitaine Inc | Houston, TX 77002 | Oil & Gas Operator | May 1991 |
| 16 | Elk Energy Corporation | Denver, CO 80218 | Oil & Gas Operator | Mar 2008 |
| 17 | Elk Petroleum Inc | Casper, WY 82601 | Oil & Gas Operator | Aug 2014 |
| 18 | Ellbogen John P LTD | Casper, WY 82602 | Oil & Gas Operator | Oct 2025 |
| 19 | Ellwood Exploration LLC | San Antonio, TX 78217 | Oil Operator | Oct 2025 |
| 20 | Elm Ridge Exploration Company LLC | Bloomfield, NM 87413 | Oil & Gas Operator | Nov 2017 |
| 21 | Emc Energies Inc | Casper, WY 82604 | Oil Operator | May 1989 |
| 22 | Emc Energy | | Oil & Gas Operator | Jun 1985 |
| 23 | Eme Wyoming LLC | Lakewood, CO 80401 | Oil & Gas Operator | Oct 2025 |
| 24 | Emep II Operating LLC | | Oil & Gas Operator | Oct 2025 |
| 25 | Emerald Operating Company | Plano, TX 75075 | Oil & Gas Operator | Oct 2025 |
| 26 | Emerald Restoration & Prod | Gillette, WY 82718 | Oil & Gas Operator | Jul 2000 |
| 27 | Empire Petroleum Corporation | Tulsa, OK 74137 | Oil & Gas Operator | Dec 2005 |
| 28 | Emre Oil LLC | Moorcroft, WY 82721 | Oil Operator | Oct 2025 |
| 29 | Encana Energy Resources Inc | Denver, CO 80202-2828 | Oil & Gas Operator | Feb 2024 |
| 30 | Encore Operating LP | Plano, TX 75024 | Oil & Gas Operator | Sep 2025 |
| 31 | Endeavor Energy LLC | | Oil Operator | Sep 2023 |
| 32 | Endeavor Energy Resources, LP | Midland, TX 79701 | Oil & Gas Operator | Mar 2025 |
| 33 | Enduro Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2018 |
| 34 | Enerex Limited Liability Co | Craig, CO 81625 | Oil & Gas Operator | Sep 2025 |
| 35 | Energas Corporation | Oklahoma City, OK 73105 | Oil & Gas Operator | Jul 2025 |
| 36 | Energen Resources Maq Inc | Birmingham, AL 35203 | Oil & Gas Operator | Sep 2000 |
| 37 | Energetics Inc | Englewood, CO 80155 | Oil & Gas Operator | Aug 1985 |
| 38 | Energy Equity Company | Columbus, MT 59019 | Oil & Gas Operator | Oct 2025 |
| 39 | Energy Operating Company Inc | Lakewood, CO 80235 | Oil & Gas Operator | Dec 2012 |
| 40 | Energy Production Co | Pittsburgh, PA 15241-3949 | Oil & Gas Operator | Dec 1994 |
| 41 | Energy Reserves Group | Houston, TX 770563020 | Oil & Gas Operator | Apr 1996 |
| 42 | Energy Search Company Inc | Aurora, CO 80011 | Oil & Gas Operator | Jun 2021 |
| 43 | Enervest Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 44 | Enpro LLC | Cottonwood, UT 84047 | Oil & Gas Operator | Nov 2017 |
| 45 | Enre LP | Kingwood, TX 77339 | Oil & Gas Operator | Feb 2004 |
| 46 | Ensource Inc | Midland, TX 79705 | Oil & Gas Operator | Aug 1998 |
| 47 | Enstar Petroleum Inc | | Oil & Gas Operator | Apr 1985 |
| 48 | Entek GRB LLC | Denver, CO 80202 | Oil & Gas Operator | Oct 2021 |
| 49 | Envirosearch Corporation | | Oil Operator | Dec 1992 |
| 50 | EOG Resources Inc | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 51 | EOG Y Resources Inc | Artesia, NM 88210 | Oil & Gas Operator | Feb 2019 |
| 52 | EP Energy E&P Company, LP | Houston, TX 77210 | Oil & Gas Operator | Jan 2023 |
| 53 | Equitable Resources Energy Company | Big Stone Gap, VA 24219 | Oil & Gas Operator | Dec 1997 |
| 54 | Equity Oil Company | Salt Lake City, UT 84110-095 | Oil & Gas Operator | Aug 2004 |
| 55 | Erg Resources LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2015 |
| 56 | Escalera Resources Co | Casper, WY 82602 | Oil & Gas Operator | May 2018 |
| 57 | Essex Energy Inc | Yukon, OK 73099-5126 | Oil & Gas Operator | Apr 2014 |
| 58 | Euroamerican Energy Group Inc | | Oil & Gas Operator | Oct 1993 |
| 59 | Everest Oil & Gas LLC | Santa Barbara, CA 93101 | Oil Operator | Oct 2025 |
| 60 | Evergreen Operating Company | Denver, CO 80202 | Oil & Gas Operator | Apr 1996 |
| 61 | Evertson Operating Company Inc | Kimball, NE 69145 | Oil & Gas Operator | Nov 2022 |
| 62 | Exco Resources Inc | Dallas, TX 75251 | Oil & Gas Operator | Aug 2025 |
| 63 | Exeter Drilling Company | Denver, CO 80217 | Oil & Gas Operator | Sep 1997 |
| 64 | Extraction Oil & Gas LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 65 | Exxon Mobil Corporation | Spring, TX 77389 | Oil & Gas Operator | Dec 2025 |
| 66 | Exxonmobil Oil Corp | Houston, TX 77210 | Oil & Gas Operator | Aug 2025 |