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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Contango Resources, Inc. | Montana | 19,790 BBLs | 87,221 MCF | Dec 2020 - Apr 2026 |
| Continental Resources Inc | Montana | 163,663 BBLs | 323,884 MCF | Jan 1991 - Mar 2026 |
| Continental Resources Inc | Wyoming | 1,398,273 BBLs | 3,465,248 MCF | Jan 1993 - Apr 2026 |
| Continental Resources, Inc. | North Dakota | 4,791,335 BBLs | 19,961,763 MCF | Sep 1978 - Mar 2026 |
| Cook Inlet Energy, LLC. | Alaska | 80,432 BBLs | 38,413 MCF | Dec 2009 - Feb 2026 |
| Coral Production Corporation | Kansas | 1,606 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Core Antrim Company LLC | Michigan | 0 BBLs | 61,288 MCF | Jul 2025 - Mar 2026 |
| Core Energy LLC | Michigan | 31,798 BBLs | 11,365 MCF | Jan 2006 - Mar 2026 |
| Cornerstone Natural Resources LLC | North Dakota | 6,639 BBLs | 8,279 MCF | Jan 2007 - Apr 2026 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 4,184,947 BBLs | 14,762,636 MCF | Oct 2002 - Mar 2026 |
| Crawford Production Company | Kansas | 2,100 BBLs | 696 MCF | Jan 1980 - Jan 2026 |
| Creole Operating, LLC | Louisiana | 1,922 BBLs | 11,244 MCF | May 2020 - Dec 2024 |
| Crescent Energy Operating, LLC | Utah | 449,314 BBLs | 2,180,865 MCF | Sep 2025 - Mar 2026 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crestone Peak Resources Operating LLC | Colorado | 1,045,746 BBLs | 5,602,684 MCF | Jan 1999 - Feb 2026 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 2,820 BBLs | 25,849 MCF | Apr 1982 - Mar 2026 |
| Cross Bar Energy, LLC | Kansas | 2,973 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Cross Timbers Energy, LLC | New Mexico | 28,131 BBLs | 357,083 MCF | Jul 2013 - Mar 2026 |
| Crowheart Energy LLC | Wyoming | 316,487 BBLs | 9,119,312 MCF | Feb 2018 - Mar 2026 |
| Crown Energy Company | Kansas | 2,270 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Curt'S Oil Operation, LLC | Kansas | 4,676 BBLs | 1,736 MCF | Jan 2010 - Jan 2026 |
| Dakota Crude, Inc. | North Dakota | 1,235 BBLs | 0 MCF | May 2003 - Mar 2026 |
| Dakota Resources, Inc | New Mexico | 1,310 BBLs | 1,221 MCF | Jan 1993 - Mar 2026 |
| Dale E. Jackson Production Co. | Kansas | 2,631 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Darrah Oil Company, LLC | Kansas | 14,734 BBLs | 5,678 MCF | Jan 2010 - Jan 2026 |
| Daube Company The | Wyoming | 7,756 BBLs | 450 MCF | Jan 1990 - Mar 2026 |
| Dawson-Markwell Exploration Co. | Kansas | 1,088 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 10,646 BBLs | 13,602 MCF | Jan 1980 - Jan 2026 |
| De Soto Oil Properties, LLC | Alabama | 1,515 BBLs | 1,261 MCF | May 1988 - Mar 2026 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore LLC | Wyoming | 172,929 BBLs | 124,621 MCF | Jan 2011 - Mar 2026 |
| Denbury Onshore, LLC | Alabama | 19,839 BBLs | 0 MCF | Jan 1956 - Mar 2026 |
| Denbury Onshore, LLC | Louisiana | 76,063 BBLs | 69,845 MCF | Jan 2004 - Dec 2024 |
| Denbury Onshore, LLC | Mississippi | 4,096 BBLs | 0 MCF | Jun 1971 - Feb 2026 |
| Denbury Onshore, LLC | Montana | 83,317 BBLs | 0 MCF | Jan 2011 - Mar 2026 |
| Denbury Onshore, LLC | North Dakota | 121,029 BBLs | 28,046 MCF | Oct 2007 - Mar 2026 |
| Deutsch Oil Company | Kansas | 2,944 BBLs | 36 MCF | Jan 1980 - Jan 2026 |
| Devon Energy Production Company LP | Wyoming | 739,295 BBLs | 1,163,981 MCF | Jan 1978 - Apr 2026 |
| Devon Energy Production Company, LP | New Mexico | 6,509,374 BBLs | 32,023,128 MCF | Jan 1993 - Mar 2026 |
| Devon Energy Williston, L.L.C | North Dakota | 3,066,377 BBLs | 13,235,912 MCF | Sep 2025 - Mar 2026 |
| Devon Energy Williston, L.L.C. | Montana | 232,997 BBLs | 224,565 MCF | Apr 2021 - Mar 2026 |
| DGH Oil, LLC | Kansas | 4,524 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Diamond Oil & Gas LLC | Wyoming | 889 BBLs | 12,782 MCF | Oct 2011 - Apr 2026 |
| Diehl Oil Inc | Kansas | 2,752 BBLs | 0 MCF | Jan 1980 - Jan 2026 |
| Diversified Production LLC | Louisiana | 8,836 BBLs | 3,242,940 MCF | May 2021 - Dec 2024 |
| Dixon Operating Company, LLC | Kansas | 9,734 BBLs | 47,163 MCF | Jan 2010 - Jan 2026 |
| DJR Operating, LLC | New Mexico | 554,485 BBLs | 1,350,894 MCF | Nov 2017 - Apr 2026 |
| DNR Oil & Gas Inc | Wyoming | 1,079 BBLs | 1,951 MCF | Jul 1989 - Mar 2026 |