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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Continental Resources Inc | Wyoming | 1,057,291 BBLs | 3,152,837 MCF | Jan 1993 - May 2026 |
| Continental Resources, Inc. | New Mexico | 1,229 BBLs | 6,832 MCF | Oct 2018 - May 2026 |
| Continental Resources, Inc. | North Dakota | 4,133,588 BBLs | 19,010,993 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 | 6,765 BBLs | 10,268 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 | 4,138,333 BBLs | 15,582,623 MCF | Oct 2002 - May 2026 |
| Covalence Operating Company LLC | Colorado | 23,150 BBLs | 257,440 MCF | Nov 2025 - May 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 | 451,654 BBLs | 2,294,636 MCF | Sep 2025 - May 2026 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 4,272 BBLs | 36,971 MCF | Apr 1982 - May 2026 |
| Cross Bar Energy, LLC | Kansas | 3,788 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| Cross Timbers Energy, LLC | New Mexico | 26,712 BBLs | 367,988 MCF | Jul 2013 - May 2026 |
| Crowheart Energy LLC | Wyoming | 266,090 BBLs | 8,498,009 MCF | Feb 2018 - May 2026 |
| Crown Energy Company | Kansas | 1,837 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| Cumberland Operating LLC | Wyoming | 209 BBLs | 22,545 MCF | Oct 2015 - May 2026 |
| Curt'S Oil Operation, LLC | Kansas | 3,285 BBLs | 1,573 MCF | Jan 2010 - Mar 2026 |
| D Oil, Inc. | Kansas | 956 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| Dakota Crude, Inc. | North Dakota | 1,249 BBLs | 0 MCF | May 2003 - May 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 | 7,961 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 |
| DBD Oil, LLC | Kansas | 947 BBLs | 0 MCF | Jan 1980 - Mar 2026 |
| De Soto Oil Properties, LLC | Alabama | 1,605 BBLs | 1,575 MCF | May 1988 - May 2026 |
| Deep River Energy LLC | Michigan | 1,533 BBLs | 0 MCF | May 2022 - Jun 2026 |
| Delta Royalties LLC | Louisiana | 2,739 BBLs | 7,275 MCF | Nov 2019 - Dec 2024 |
| Denbury Onshore LLC | Wyoming | 124,767 BBLs | 113,265 MCF | Jan 2011 - May 2026 |
| Denbury Onshore, LLC | Alabama | 17,328 BBLs | 0 MCF | Jan 1956 - May 2026 |
| Denbury Onshore, LLC | Louisiana | 76,063 BBLs | 69,845 MCF | Jan 2004 - Dec 2024 |
| Denbury Onshore, LLC | Mississippi | 69,283 BBLs | 40,801 MCF | Jun 1971 - Apr 2026 |
| Denbury Onshore, LLC | Montana | 72,481 BBLs | 0 MCF | Jan 2011 - May 2026 |
| Denbury Onshore, LLC | North Dakota | 100,995 BBLs | 30,933 MCF | Oct 2007 - May 2026 |
| Deutsch Oil Company | Kansas | 3,342 BBLs | 387 MCF | Jan 1980 - Mar 2026 |
| Devon Energy Production Company LP | Wyoming | 790,522 BBLs | 1,234,085 MCF | Jan 1978 - May 2026 |
| Devon Energy Production Company, LP | New Mexico | 7,318,760 BBLs | 37,671,230 MCF | Jan 1993 - May 2026 |
| Devon Energy Williston, L.L.C | North Dakota | 2,883,412 BBLs | 13,065,053 MCF | Sep 2025 - May 2026 |
| Devon Energy Williston, L.L.C. | Montana | 215,090 BBLs | 232,759 MCF | Apr 2021 - May 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 | 939 BBLs | 14,577 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 |