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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Duke Gas Company LLC | Colorado | 0 BBLs | 11,724 MCF | Jan 1999 - Dec 2024 |
| Dunamis Energy Operating LLC | Colorado | 13,987 BBLs | 20,727 MCF | Sep 2011 - Dec 2024 |
| Dunn Exploration Company, LLC | Louisiana | 68,232 BBLs | 141,231 MCF | Apr 2010 - Jan 2025 |
| Durango Operating, LLC | Alabama | 1,737 BBLs | 27 MCF | May 1952 - Oct 2025 |
| E2 Operating, LLC | Mississippi | 3,508 BBLs | 351 MCF | Nov 1976 - Oct 2025 |
| Eagle Creek Corporation | Kansas | 2,538 BBLs | 670 MCF | Jan 1980 - Sep 2025 |
| Eagle Energy Development Company | Louisiana | 336 BBLs | 12,524 MCF | Dec 2009 - Dec 2024 |
| Eagle Operating, Inc. | North Dakota | 4,762 BBLs | 6,262 MCF | Dec 1991 - Dec 2025 |
| Earthstone Operating, LLC | New Mexico | 1,019,169 BBLs | 2,954,751 MCF | Mar 2022 - Dec 2025 |
| Edge Energy LLC | Colorado | 34,009 BBLs | 304,007 MCF | Aug 2018 - Dec 2024 |
| Edison Operating Company LLC | Kansas | 14,753 BBLs | 232,816 MCF | Jan 1980 - Sep 2025 |
| Edmiston Oil Company, Inc. | Kansas | 1,788 BBLs | 9,693 MCF | Jan 1980 - Sep 2025 |
| Egh Operating, LLC | Louisiana | 1,847 BBLs | 0 MCF | Aug 2018 - Dec 2024 |
| Elendil Resources LLC | Kansas | 0 BBLs | 23,139 MCF | Jan 2020 - Sep 2025 |
| Elevate Energy LTD | Kansas | 5,398 BBLs | 734 MCF | Jan 2020 - Sep 2025 |
| Elite Group LLC | Mississippi | 1,844 BBLs | 0 MCF | Dec 1976 - Oct 2025 |
| Elk Energy Holdings LLC | Kansas | 1,152 BBLs | 10,519 MCF | Jan 2010 - Sep 2025 |
| Elk Operating Services, LLC | Utah | 242,204 BBLs | 803,910 MCF | Jan 2018 - Dec 2025 |
| Elm III Operating Company LLC | Kansas | 1,283 BBLs | 17,069 MCF | Jan 1980 - Sep 2025 |
| Emep II Operating LLC | Wyoming | 49,214 BBLs | 223,173 MCF | Aug 2025 - Dec 2025 |
| Empire New Mexico LLC | New Mexico | 32,114 BBLs | 90,908 MCF | May 2021 - Nov 2025 |
| Empire North Dakota LLC | North Dakota | 24,544 BBLs | 6,881 MCF | Sep 2019 - Dec 2025 |
| Empresa Operating, LLC | Louisiana | 30,933 BBLs | 276,367 MCF | Sep 2019 - Dec 2024 |
| Emre Oil LLC | Wyoming | 2,600 BBLs | 0 MCF | Jul 2015 - Dec 2025 |
| Endeavor Energy Resources, LP | Kansas | 0 BBLs | 11,784 MCF | Jan 1980 - Sep 2025 |
| Endurance Operating LLC | Louisiana | 1,790 BBLs | 7,885 MCF | Nov 2022 - Dec 2024 |
| Enduring Resources LLC | Colorado | 0 BBLs | 604,797 MCF | Jan 1999 - Dec 2024 |
| Enduring Resources, LLC | New Mexico | 477,749 BBLs | 1,739,336 MCF | Dec 2017 - Nov 2025 |
| Enerplus Resources USA Corporation | North Dakota | 1,693,412 BBLs | 3,673,202 MCF | Mar 2006 - Dec 2025 |
| Enerquest Operating, LLC | Utah | 755 BBLs | 5,934 MCF | Oct 2012 - Dec 2025 |
| Enpower Resources Inc. | Louisiana | 79 BBLs | 15,400 MCF | Oct 2019 - Dec 2024 |
| Ensight IV Energy Management, LLC | Louisiana | 4,268 BBLs | 417,482 MCF | Jul 2017 - Dec 2024 |
| Enterra Resources, LLC | Kansas | 4,397 BBLs | 11,054 MCF | Jan 2010 - Sep 2025 |
| EOG Resources Inc | New Mexico | 10,282,041 BBLs | 55,162,675 MCF | Jan 1993 - Nov 2025 |
| EOG Resources Inc | Wyoming | 884,080 BBLs | 5,942,553 MCF | Jan 1978 - Dec 2025 |
| EOG Resources, Inc. | North Dakota | 908,794 BBLs | 1,789,363 MCF | Apr 2001 - Dec 2025 |
| Epic Energy LLC | Colorado | 0 BBLs | 24,683 MCF | Jan 1999 - Dec 2024 |
| Epic Energy, L.L.C. | New Mexico | 3,072 BBLs | 281,327 MCF | Mar 2018 - Nov 2025 |
| Et Gathering & Processing LLC | Louisiana | 4,239 BBLs | 0 MCF | Oct 2023 - Dec 2024 |
| Ethyl Gas Company, LLC | Louisiana | 1,456 BBLs | 0 MCF | Nov 2021 - Jan 2025 |
| Evangeline Natural Resources, LLC | Louisiana | 3,123 BBLs | 24,531 MCF | Aug 2013 - Jan 2025 |
| Evans Energy, LLC | Kansas | 176 BBLs | 11,251 MCF | Jan 1980 - Sep 2025 |
| Evergreen Natural Resources LLC | Colorado | 0 BBLs | 2,145,735 MCF | Jan 1999 - Dec 2024 |
| Ew Operating (NM), LLC | New Mexico | 4,318 BBLs | 8,920 MCF | Jul 2025 - Nov 2025 |
| Excalibur Production Company, Inc. | Kansas | 4,749 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Excel Operating Corporation | Louisiana | 611 BBLs | 13,099 MCF | Jan 1997 - Dec 2024 |
| Exco Operating Company, LP | Louisiana | 0 BBLs | 7,351,709 MCF | Jul 2008 - Dec 2024 |
| Extex Operating Co | Louisiana | 3,073 BBLs | 7,467 MCF | Dec 1999 - Dec 2024 |
| Extex Operating Company | New Mexico | 14,780 BBLs | 42,732 MCF | Apr 2021 - Dec 2025 |
| Extraction Oil & Gas LLC | Colorado | 901,323 BBLs | 6,604,026 MCF | Jan 1999 - Dec 2024 |