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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Continental Resources Inc | Montana | 235,616 BBLs | 364,746 MCF | Jan 1991 - Oct 2025 |
| Continental Resources Inc | Wyoming | 946,850 BBLs | 2,958,620 MCF | Jan 1993 - Oct 2025 |
| Continental Resources, Inc. | North Dakota | 6,075,240 BBLs | 21,195,661 MCF | Sep 1978 - Nov 2025 |
| Cook Inlet Energy, LLC. | Alaska | 104,954 BBLs | 45,482 MCF | Dec 2009 - Nov 2025 |
| Coral Production Corporation | Kansas | 2,398 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Core Antrim Company LLC | Michigan | 0 BBLs | 64,602 MCF | Jul 2025 - Oct 2025 |
| Core Energy LLC | Michigan | 35,762 BBLs | 12,152 MCF | Jan 2006 - Nov 2025 |
| Cornerstone Natural Resources LLC | North Dakota | 7,294 BBLs | 10,606 MCF | Jan 2007 - Nov 2025 |
| Coteau Energy LLC | Louisiana | 11,100 BBLs | 72,787 MCF | Aug 2021 - Dec 2024 |
| Coterra Energy Operating Co. | New Mexico | 1,453,543 BBLs | 7,072,169 MCF | Oct 2002 - Oct 2025 |
| Coterra Energy Operating E LLC | New Mexico | 278,083 BBLs | 377,670 MCF | Jan 2023 - Oct 2025 |
| Coterra Energy Operating F LLC | New Mexico | 1,038,031 BBLs | 3,733,554 MCF | Apr 2019 - Oct 2025 |
| Crawford Production Company | Kansas | 1,336 BBLs | 721 MCF | Jan 1980 - Jun 2025 |
| Creole Operating, LLC | Louisiana | 1,922 BBLs | 11,244 MCF | May 2020 - Dec 2024 |
| Crescent Energy Operating, LLC | Utah | 545,242 BBLs | 2,231,375 MCF | Sep 2025 - Oct 2025 |
| Crescent Pass Energy, LLC | Louisiana | 100 BBLs | 90,211 MCF | Aug 2018 - Jan 2025 |
| Crestone Peak Resources Operating LLC | Colorado | 1,194,509 BBLs | 6,520,402 MCF | Jan 1999 - Oct 2025 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 2,180 BBLs | 19,175 MCF | Apr 1982 - Oct 2025 |
| Cross Bar Energy, LLC | Kansas | 2,273 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Cross Timbers Energy, LLC | New Mexico | 27,808 BBLs | 390,776 MCF | Jul 2013 - Oct 2025 |
| Crowheart Energy LLC | Wyoming | 266,943 BBLs | 8,941,008 MCF | Feb 2018 - Oct 2025 |
| Crown Energy Company | Kansas | 2,315 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Curt'S Oil Operation, LLC | Kansas | 4,627 BBLs | 2,475 MCF | Jan 2010 - Jun 2025 |
| Dakota Crude, Inc. | North Dakota | 1,398 BBLs | 0 MCF | May 2003 - Nov 2025 |
| Dakota Resources, Inc | New Mexico | 1,330 BBLs | 1,457 MCF | Jan 1993 - Oct 2025 |
| Dale E. Jackson Production Co. | Kansas | 1,960 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Darrah Oil Company, LLC | Kansas | 16,783 BBLs | 7,084 MCF | Jan 2010 - Jun 2025 |
| Daube Company The | Wyoming | 7,535 BBLs | 450 MCF | Jan 1990 - Oct 2025 |
| Daylight Petroleum LLC | Louisiana | 6,709 BBLs | 21,077 MCF | Feb 2019 - Dec 2024 |
| Daystar Petroleum, Inc. | Kansas | 11,240 BBLs | 14,356 MCF | Jan 1980 - Jun 2025 |
| De Soto Oil Properties, LLC | Alabama | 1,896 BBLs | 1,483 MCF | May 1988 - Oct 2025 |
| Deep River Energy LLC | Michigan | 1,380 BBLs | 0 MCF | May 2022 - 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 | 25,633 BBLs | 192,413 MCF | Jun 1971 - Oct 2025 |
| Denbury Onshore, LLC | Montana | 280,617 BBLs | 5,914,394 MCF | Jan 2011 - Oct 2025 |
| Denbury Onshore, LLC | North Dakota | 95,222 BBLs | 20,847 MCF | Oct 2007 - Nov 2025 |
| Desert Eagle Operating LLC | Colorado | 0 BBLs | 42,639 MCF | Apr 2022 - Oct 2025 |
| Deutsch Oil Company | Kansas | 3,496 BBLs | 988 MCF | Jan 1980 - Jun 2025 |
| Devon Energy Production Company LP | Wyoming | 784,121 BBLs | 1,286,825 MCF | Jan 1978 - Oct 2025 |
| Devon Energy Production Company, LP | New Mexico | 7,691,894 BBLs | 34,667,236 MCF | Jan 1993 - Nov 2025 |
| Devon Energy Williston, L.L.C | North Dakota | 3,498,237 BBLs | 14,611,244 MCF | Sep 2025 - Nov 2025 |
| Devon Energy Williston, L.L.C. | Montana | 180,946 BBLs | 160,941 MCF | Apr 2021 - Oct 2025 |
| DGH Oil, LLC | Kansas | 4,658 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| DHP Investments, LTD. | Kansas | 1,316 BBLs | 0 MCF | Mar 2008 - Jun 2025 |
| Diamond Oil & Gas LLC | Wyoming | 968 BBLs | 13,096 MCF | Oct 2011 - Oct 2025 |
| Diehl Oil Inc | Kansas | 2,094 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Digital Operating Company LLC | Montana | 1,231 BBLs | 0 MCF | Jun 2021 - Oct 2025 |
| Diversified Production LLC | Louisiana | 8,836 BBLs | 3,242,940 MCF | May 2021 - Dec 2024 |
| Dixon Operating Company, LLC | Kansas | 11,466 BBLs | 46,104 MCF | Jan 2010 - Jun 2025 |