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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Continental Resources, Inc. | North Dakota | 5,638,362 BBLs | 20,525,149 MCF | Sep 1978 - Dec 2025 |
| Cook Inlet Energy, LLC. | Alaska | 96,247 BBLs | 43,754 MCF | Dec 2009 - Dec 2025 |
| Coral Production Corporation | Kansas | 2,701 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Core Antrim Company LLC | Michigan | 0 BBLs | 62,871 MCF | Jul 2025 - Dec 2025 |
| Core Energy LLC | Michigan | 31,657 BBLs | 11,084 MCF | Jan 2006 - Dec 2025 |
| Cornerstone Natural Resources LLC | North Dakota | 6,827 BBLs | 9,299 MCF | Jan 2007 - Dec 2025 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 1,445,753 BBLs | 6,808,439 MCF | Oct 2002 - Nov 2025 |
| Coterra Energy Operating E LLC | New Mexico | 300,622 BBLs | 440,940 MCF | Jan 2023 - Nov 2025 |
| Coterra Energy Operating F LLC | New Mexico | 955,624 BBLs | 3,450,238 MCF | Apr 2019 - Nov 2025 |
| Crawford Production Company | Kansas | 2,155 BBLs | 705 MCF | Jan 1980 - Sep 2025 |
| Creole Operating, LLC | Louisiana | 1,922 BBLs | 11,244 MCF | May 2020 - Dec 2024 |
| Crescent Energy Operating, LLC | Utah | 536,688 BBLs | 2,304,005 MCF | Sep 2025 - Nov 2025 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crestone Peak Resources Operating LLC | Colorado | 1,682,693 BBLs | 7,870,576 MCF | Jan 1999 - Dec 2024 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 2,756 BBLs | 22,761 MCF | Apr 1982 - Oct 2025 |
| Cross Bar Energy, LLC | Kansas | 2,889 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Cross Timbers Energy, LLC | New Mexico | 27,051 BBLs | 379,214 MCF | Jul 2013 - Nov 2025 |
| Crowheart Energy LLC | Wyoming | 247,025 BBLs | 8,325,151 MCF | Feb 2018 - Nov 2025 |
| Crown Energy Company | Kansas | 1,773 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Cumberland Operating LLC | Wyoming | 216 BBLs | 12,641 MCF | Oct 2015 - Dec 2025 |
| Curt'S Oil Operation, LLC | Kansas | 3,628 BBLs | 2,019 MCF | Jan 2010 - Sep 2025 |
| Dakota Resources, Inc | New Mexico | 1,652 BBLs | 1,417 MCF | Jan 1993 - Nov 2025 |
| Dale E. Jackson Production Co. | Kansas | 1,949 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Darrah Oil Company, LLC | Kansas | 16,969 BBLs | 6,489 MCF | Jan 2010 - Sep 2025 |
| Daube Company The | Wyoming | 7,331 BBLs | 450 MCF | Jan 1990 - Nov 2025 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 10,551 BBLs | 14,643 MCF | Jan 1980 - Sep 2025 |
| De Soto Oil Properties, LLC | Alabama | 1,597 BBLs | 1,520 MCF | May 1988 - Oct 2025 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore, LLC | Louisiana | 76,063 BBLs | 69,845 MCF | Jan 2004 - Dec 2024 |
| Denbury Onshore, LLC | Mississippi | 83,136 BBLs | 352,169 MCF | Jun 1971 - Oct 2025 |
| Denbury Onshore, LLC | Montana | 268,744 BBLs | 52,501 MCF | Jan 2011 - Nov 2025 |
| Denbury Onshore, LLC | North Dakota | 100,426 BBLs | 16,522 MCF | Oct 2007 - Dec 2025 |
| Desert Eagle Operating LLC | Colorado | 0 BBLs | 49,629 MCF | Apr 2022 - Dec 2024 |
| Deutsch Oil Company | Kansas | 3,240 BBLs | 532 MCF | Jan 1980 - Sep 2025 |
| Devon Energy Production Company LP | Wyoming | 715,660 BBLs | 1,213,454 MCF | Jan 1978 - Dec 2025 |
| Devon Energy Production Company, LP | New Mexico | 7,569,467 BBLs | 36,496,409 MCF | Jan 1993 - Nov 2025 |
| Devon Energy Williston, L.L.C | North Dakota | 2,985,682 BBLs | 13,015,137 MCF | Sep 2025 - Dec 2025 |
| Devon Energy Williston, L.L.C. | Montana | 135,978 BBLs | 127,866 MCF | Apr 2021 - Nov 2025 |
| DGH Oil, LLC | Kansas | 4,619 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Diamond Oil & Gas LLC | Wyoming | 797 BBLs | 12,724 MCF | Oct 2011 - Dec 2025 |
| Diehl Oil Inc | Kansas | 2,085 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Diversified Production LLC | Louisiana | 8,836 BBLs | 3,242,940 MCF | May 2021 - Dec 2024 |
| Dixon Operating Company, LLC | Kansas | 10,515 BBLs | 47,988 MCF | Jan 2010 - Sep 2025 |
| DJR Operating, LLC | New Mexico | 423,371 BBLs | 1,193,026 MCF | Nov 2017 - Nov 2025 |
| Dorcheat Oil & Gas, LLC | Louisiana | 245 BBLs | 35,651 MCF | Mar 2016 - Dec 2024 |
| Double Eagle Exploration, Inc. | Kansas | 1,573 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Downing-Nelson Oil Co Inc | Kansas | 21,507 BBLs | 0 MCF | Jan 1980 - Sep 2025 |
| Dugan Production Corp | New Mexico | 3,055 BBLs | 562,067 MCF | Jan 1993 - Nov 2025 |