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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Continental Resources, Inc. | North Dakota | 4,133,925 BBLs | 19,011,257 MCF | Sep 1978 - May 2026 |
| Cook Inlet Energy, LLC. | Alaska | 80,432 BBLs | 38,413 MCF | Dec 2009 - Feb 2026 |
| Coral Production Corporation | Kansas | 1,436 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| Core Antrim Company LLC | Michigan | 0 BBLs | 59,009 MCF | Jul 2025 - May 2026 |
| Core Energy LLC | Michigan | 31,260 BBLs | 10,745 MCF | Jan 2006 - May 2026 |
| Cornerstone Natural Resources LLC | North Dakota | 6,224 BBLs | 9,396 MCF | Jan 2007 - May 2026 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 3,895,018 BBLs | 14,913,239 MCF | Oct 2002 - Apr 2026 |
| Covalence Operating Company LLC | Colorado | 23,146 BBLs | 247,393 MCF | Nov 2025 - Mar 2026 |
| Crawford Production Company | Kansas | 1,958 BBLs | 651 MCF | Jan 1980 - Mar 2026 |
| Creole Operating, LLC | Louisiana | 1,922 BBLs | 11,244 MCF | May 2020 - Dec 2024 |
| Crescent Energy Operating, LLC | Utah | 467,632 BBLs | 2,293,428 MCF | Sep 2025 - Apr 2026 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crestone Peak Resources Operating LLC | Colorado | 1,103,092 BBLs | 6,090,344 MCF | Jan 1999 - Mar 2026 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 2,820 BBLs | 25,849 MCF | Apr 1982 - Mar 2026 |
| Cross Bar Energy, LLC | Kansas | 3,788 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| Cross Timbers Energy, LLC | New Mexico | 27,058 BBLs | 320,990 MCF | Jul 2013 - Apr 2026 |
| Crowheart Energy LLC | Wyoming | 313,558 BBLs | 9,333,102 MCF | Feb 2018 - Apr 2026 |
| Crown Energy Company | Kansas | 1,837 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| Curt'S Oil Operation, LLC | Kansas | 3,285 BBLs | 1,573 MCF | Jan 2010 - Mar 2026 |
| Dakota Crude, Inc. | North Dakota | 1,249 BBLs | 0 MCF | May 2003 - May 2026 |
| Dakota Resources, Inc | New Mexico | 1,481 BBLs | 1,565 MCF | Jan 1993 - Apr 2026 |
| Dale E. Jackson Production Co. | Kansas | 1,930 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| Darrah Oil Company, LLC | Kansas | 14,397 BBLs | 5,781 MCF | Jan 2010 - Mar 2026 |
| Daube Company The | Wyoming | 7,427 BBLs | 450 MCF | Jan 1990 - May 2026 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 10,257 BBLs | 11,892 MCF | Jan 1980 - Mar 2026 |
| De Soto Oil Properties, LLC | Alabama | 1,515 BBLs | 1,261 MCF | May 1988 - Mar 2026 |
| Delhi-Trading LLC | Utah | 1,100 BBLs | 0 MCF | Oct 2016 - May 2026 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore LLC | Wyoming | 155,013 BBLs | 119,232 MCF | Jan 2011 - May 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 | 4,024 BBLs | 0 MCF | Jun 1971 - Apr 2026 |
| Denbury Onshore, LLC | Montana | 72,481 BBLs | 0 MCF | Jan 2011 - Apr 2026 |
| Denbury Onshore, LLC | North Dakota | 100,995 BBLs | 30,933 MCF | Oct 2007 - May 2026 |
| Desert Eagle Operating LLC | Colorado | 0 BBLs | 29,526 MCF | Apr 2022 - Mar 2026 |
| Deutsch Oil Company | Kansas | 3,342 BBLs | 387 MCF | Jan 1980 - Mar 2026 |
| Devon Energy Production Company LP | Wyoming | 819,847 BBLs | 1,198,182 MCF | Jan 1978 - May 2026 |
| Devon Energy Production Company, LP | New Mexico | 6,743,149 BBLs | 32,998,099 MCF | Jan 1993 - Apr 2026 |
| Devon Energy Williston, L.L.C | North Dakota | 2,806,470 BBLs | 12,882,467 MCF | Sep 2025 - May 2026 |
| Devon Energy Williston, L.L.C. | Montana | 215,090 BBLs | 232,759 MCF | Apr 2021 - Apr 2026 |
| DGH Oil, LLC | Kansas | 4,359 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| DHP Investments, LTD. | Kansas | 1,141 BBLs | 0 MCF | Mar 2008 - Mar 2026 |
| Diamond Oil & Gas LLC | Wyoming | 1,005 BBLs | 12,577 MCF | Oct 2011 - May 2026 |
| Diehl Oil Inc | Kansas | 2,632 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| Diversified Production LLC | Louisiana | 8,836 BBLs | 3,242,940 MCF | May 2021 - Dec 2024 |
| Dixon Operating Company, LLC | Kansas | 11,264 BBLs | 42,869 MCF | Jan 2010 - Mar 2026 |
| DJR Operating, LLC | New Mexico | 590,833 BBLs | 1,342,685 MCF | Nov 2017 - Apr 2026 |
| DNR Oil And Gas, Inc. | Kansas | 1,004 BBLs | 0 MCF | Jan 1980 - Mar 2026 |