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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Continental Resources Inc | Montana | 192,166 BBLs | 330,165 MCF | Jan 1991 - Jan 2026 |
| Continental Resources Inc | Wyoming | 1,196,781 BBLs | 3,154,029 MCF | Jan 1993 - Jan 2026 |
| Continental Resources, Inc. | North Dakota | 5,453,083 BBLs | 20,243,134 MCF | Sep 1978 - Feb 2026 |
| Cook Inlet Energy, LLC. | Alaska | 89,464 BBLs | 42,179 MCF | Dec 2009 - Feb 2026 |
| Coral Production Corporation | Kansas | 1,609 BBLs | 0 MCF | Jan 1980 - Nov 2025 |
| Core Antrim Company LLC | Michigan | 0 BBLs | 65,995 MCF | Jul 2025 - Aug 2025 |
| Core Energy LLC | Michigan | 29,510 BBLs | 8,671 MCF | Jan 2006 - Aug 2025 |
| Cornerstone Natural Resources LLC | North Dakota | 4,993 BBLs | 6,913 MCF | Jan 2007 - Feb 2026 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 3,633,558 BBLs | 13,110,635 MCF | Oct 2002 - Jan 2026 |
| Crawford Production Company | Kansas | 2,405 BBLs | 726 MCF | Jan 1980 - Nov 2025 |
| Creole Operating, LLC | Louisiana | 1,922 BBLs | 11,244 MCF | May 2020 - Dec 2024 |
| Crescent Energy Operating, LLC | Utah | 498,358 BBLs | 2,318,331 MCF | Sep 2025 - Jan 2026 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crestone Peak Resources Operating LLC | Colorado | 1,162,657 BBLs | 6,266,589 MCF | Jan 1999 - Jan 2026 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 5,867 BBLs | 44,023 MCF | Apr 1982 - Dec 2025 |
| Cross Bar Energy, LLC | Kansas | 2,923 BBLs | 0 MCF | Jan 1980 - Nov 2025 |
| Cross Timbers Energy, LLC | New Mexico | 23,626 BBLs | 352,150 MCF | Jul 2013 - Jan 2026 |
| Crown Energy Company | Kansas | 1,937 BBLs | 0 MCF | Jan 1980 - Nov 2025 |
| Cumberland Operating LLC | Wyoming | 170 BBLs | 18,774 MCF | Oct 2015 - Jan 2026 |
| Curt'S Oil Operation, LLC | Kansas | 4,562 BBLs | 1,815 MCF | Jan 2010 - Nov 2025 |
| D & H Energy, LLC | Montana | 715 BBLs | 6,061 MCF | Jul 2016 - Jan 2026 |
| Dakota Crude, Inc. | North Dakota | 1,114 BBLs | 0 MCF | May 2003 - Feb 2026 |
| Dale E. Jackson Production Co. | Kansas | 2,488 BBLs | 0 MCF | Jan 1980 - Nov 2025 |
| Darrah Oil Company, LLC | Kansas | 17,108 BBLs | 6,594 MCF | Jan 2010 - Nov 2025 |
| Daube Company The | Wyoming | 7,468 BBLs | 450 MCF | Jan 1990 - Jan 2026 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 11,983 BBLs | 15,133 MCF | Jan 1980 - Nov 2025 |
| De Soto Oil Properties, LLC | Alabama | 1,796 BBLs | 1,578 MCF | May 1988 - Dec 2025 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore, LLC | Alabama | 20,178 BBLs | 0 MCF | Jan 1956 - Dec 2025 |
| Denbury Onshore, LLC | Louisiana | 76,063 BBLs | 69,845 MCF | Jan 2004 - Dec 2024 |
| Denbury Onshore, LLC | Montana | 85,101 BBLs | 0 MCF | Jan 2011 - Jan 2026 |
| Denbury Onshore, LLC | North Dakota | 104,385 BBLs | 17,431 MCF | Oct 2007 - Feb 2026 |
| Desert Eagle Operating LLC | Colorado | 0 BBLs | 47,063 MCF | Apr 2022 - Jan 2026 |
| Deutsch Oil Company | Kansas | 4,092 BBLs | 590 MCF | Jan 1980 - Nov 2025 |
| Devon Energy Production Company LP | Wyoming | 658,968 BBLs | 1,221,834 MCF | Jan 1978 - Jan 2026 |
| Devon Energy Production Company, LP | New Mexico | 6,065,515 BBLs | 31,195,320 MCF | Jan 1993 - Jan 2026 |
| Devon Energy Williston, L.L.C | North Dakota | 2,906,837 BBLs | 12,902,882 MCF | Sep 2025 - Feb 2026 |
| Devon Energy Williston, L.L.C. | Montana | 94,855 BBLs | 104,922 MCF | Apr 2021 - Jan 2026 |
| DGH Oil, LLC | Kansas | 3,955 BBLs | 0 MCF | Jan 1980 - Nov 2025 |
| Diehl Oil Inc | Kansas | 2,554 BBLs | 0 MCF | Jan 1980 - Nov 2025 |
| Diversified Production LLC | Louisiana | 8,836 BBLs | 3,242,940 MCF | May 2021 - Dec 2024 |
| Dixon Operating Company, LLC | Kansas | 11,696 BBLs | 48,345 MCF | Jan 2010 - Nov 2025 |
| DJR Operating, LLC | New Mexico | 363,594 BBLs | 1,106,479 MCF | Nov 2017 - Jan 2026 |
| Dorcheat Oil & Gas, LLC | Louisiana | 245 BBLs | 35,651 MCF | Mar 2016 - Dec 2024 |
| Double Eagle Exploration, Inc. | Kansas | 1,581 BBLs | 0 MCF | Jan 1980 - Nov 2025 |
| Double G Petro LLC | Kansas | 1,322 BBLs | 0 MCF | Jan 2024 - Nov 2025 |
| Downing-Nelson Oil Co Inc | Kansas | 19,512 BBLs | 1,696 MCF | Jan 1980 - Nov 2025 |
| Dugan Production Corp | New Mexico | 2,284 BBLs | 527,930 MCF | Jan 1993 - Jan 2026 |