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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Double Eagle Exploration, Inc. | Kansas | 968 BBLs | 0 MCF | Jan 1980 - Feb 2026 |
| Double G Petro LLC | Kansas | 1,562 BBLs | 0 MCF | Feb 2020 - Feb 2026 |
| Downing-Nelson Oil Co Inc | Kansas | 19,645 BBLs | 451 MCF | Jan 1980 - Feb 2026 |
| Dugan Production Corp | New Mexico | 2,622 BBLs | 450,642 MCF | Jan 1993 - Apr 2026 |
| Dunamis Energy Operating LLC | Colorado | 257,941 BBLs | 1,201,508 MCF | Sep 2011 - Mar 2026 |
| Dunn Exploration Company, LLC | Louisiana | 68,232 BBLs | 141,231 MCF | Apr 2010 - Jan 2025 |
| Durango Operating LLC | Mississippi | 1,429 BBLs | 255 MCF | Dec 1976 - Apr 2026 |
| Durango Operating, LLC | Alabama | 2,042 BBLs | 27 MCF | May 1952 - Mar 2026 |
| E2 Operating, LLC | Mississippi | 3,117 BBLs | 312 MCF | Nov 1976 - Apr 2026 |
| Eagle Creek Corporation | Kansas | 2,530 BBLs | 713 MCF | Jan 1980 - Feb 2026 |
| Eagle Operating, Inc. | North Dakota | 4,052 BBLs | 6,052 MCF | Dec 1991 - Apr 2026 |
| Earthstone Operating, LLC | New Mexico | 737,433 BBLs | 2,377,877 MCF | Mar 2022 - Apr 2026 |
| Edison Operating Company LLC | Kansas | 13,521 BBLs | 208,858 MCF | Jan 1980 - Feb 2026 |
| Edmiston Oil Company, Inc. | Kansas | 2,099 BBLs | 11,893 MCF | Jan 1980 - Feb 2026 |
| Egh Operating, LLC | Louisiana | 1,847 BBLs | 0 MCF | Aug 2018 - Dec 2024 |
| Elevate Energy LTD | Kansas | 4,783 BBLs | 1,447 MCF | Jan 2020 - Feb 2026 |
| Elk Energy Holdings LLC | Kansas | 1,546 BBLs | 3,205 MCF | Jan 2010 - Feb 2026 |
| Elk Operating Services, LLC | Utah | 243,506 BBLs | 847,827 MCF | Jan 2018 - May 2026 |
| Elm III Operating Company LLC | Kansas | 1,055 BBLs | 8,382 MCF | Jan 1980 - Feb 2026 |
| Emep II Operating LLC | Wyoming | 68,175 BBLs | 252,276 MCF | Aug 2025 - Apr 2026 |
| Empire New Mexico LLC | New Mexico | 24,392 BBLs | 73,393 MCF | May 2021 - Apr 2026 |
| Empire North Dakota LLC | Montana | 3,263 BBLs | 0 MCF | Jul 2019 - Apr 2026 |
| Empire North Dakota LLC | North Dakota | 16,254 BBLs | 1,570 MCF | Sep 2019 - Apr 2026 |
| Empresa Operating, LLC | Louisiana | 30,933 BBLs | 276,367 MCF | Sep 2019 - Dec 2024 |
| Emre Oil LLC | Wyoming | 1,960 BBLs | 0 MCF | Jul 2015 - Apr 2026 |
| Endurance Operating LLC | Louisiana | 1,790 BBLs | 7,885 MCF | Nov 2022 - Dec 2024 |
| Enduring Resources LLC | Colorado | 0 BBLs | 1,070,643 MCF | Jan 1999 - Apr 2026 |
| Enduring Resources, LLC | New Mexico | 439,023 BBLs | 1,717,124 MCF | Dec 2017 - Apr 2026 |
| Enerplus Resources USA Corporation | North Dakota | 1,835,776 BBLs | 3,968,921 MCF | Mar 2006 - Apr 2026 |
| Ensight IV Energy Management, LLC | Louisiana | 4,268 BBLs | 417,482 MCF | Jul 2017 - Dec 2024 |
| Enterra Resources, LLC | Kansas | 5,649 BBLs | 8,390 MCF | Jan 2010 - Feb 2026 |
| EOG Resources Inc | New Mexico | 10,050,039 BBLs | 57,536,236 MCF | Jan 1993 - May 2026 |
| EOG Resources Inc | Wyoming | 1,080,749 BBLs | 6,677,142 MCF | Jan 1978 - Apr 2026 |
| EOG Resources, Inc. | North Dakota | 848,199 BBLs | 1,709,866 MCF | Apr 2001 - Apr 2026 |
| Epic Energy, L.L.C. | New Mexico | 2,974 BBLs | 265,336 MCF | Mar 2018 - Apr 2026 |
| 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 |
| Evergreen Natural Resources LLC | Colorado | 0 BBLs | 1,822,213 MCF | Jan 1999 - Mar 2026 |
| Ew Operating (NM), LLC | New Mexico | 4,174 BBLs | 5,041 MCF | Jul 2025 - Apr 2026 |
| Excalibur Production Company, Inc. | Kansas | 4,681 BBLs | 0 MCF | Jan 1980 - Feb 2026 |
| 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 | 13,742 BBLs | 39,654 MCF | Apr 2021 - Apr 2026 |
| Extraction Oil & Gas LLC | Colorado | 697,428 BBLs | 5,792,028 MCF | Jan 1999 - Mar 2026 |
| Exxon Mobil Corporation | Alabama | 1,763 BBLs | 1,316,027 MCF | Nov 1971 - Mar 2026 |
| Exxon Mobil Corporation | Wyoming | 0 BBLs | 21,631,642 MCF | Jan 1978 - Apr 2026 |
| F. G. Holl Company L.L.C. | Kansas | 7,283 BBLs | 8,232 MCF | Jan 1980 - Feb 2026 |
| Fae II Operating LLC | New Mexico | 20,691 BBLs | 104,583 MCF | Dec 2019 - Apr 2026 |