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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Armstrong Operating, Inc. | Montana | 1,267 BBLs | 48 MCF | Feb 1995 - Jul 2025 |
| Citation Oil & Gas Corp. | Montana | 15,674 BBLs | 838 MCF | Jan 1991 - Jul 2025 |
| Continental Resources Inc | Montana | 167,273 BBLs | 304,156 MCF | Jan 1991 - Jul 2025 |
| CWT Operating, LLC | Montana | 887 BBLs | 14 MCF | Dec 2021 - Jul 2025 |
| Darrah Oil Company, LLC | Montana | 541 BBLs | 0 MCF | Sep 2007 - Jul 2025 |
| Devon Energy Williston, L.L.C. | Montana | 107,902 BBLs | 99,619 MCF | Apr 2021 - Jul 2025 |
| Foundation Energy Management, LLC | Montana | 978 BBLs | 658 MCF | Jan 2016 - Jul 2025 |
| Genesis St Operating LLC | Montana | 0 BBLs | 0 MCF | May 1992 - Jul 2025 |
| Granite Creek Energy LLC | Montana | 7,838 BBLs | 7,560 MCF | Mar 2024 - Jul 2025 |
| Green Valley Operating, LLC | Montana | 2,504 BBLs | 2,514 MCF | Jun 2022 - Jul 2025 |
| Kraken Operating, LLC | Montana | 958,431 BBLs | 1,444,532 MCF | Sep 2013 - Jul 2025 |
| Oasis Petroleum North America LLC | Montana | 48,001 BBLs | 66,121 MCF | Mar 2007 - Jul 2025 |
| Phoenix Operating LLC | Montana | 139,735 BBLs | 103,405 MCF | Dec 2024 - Jul 2025 |
| Prima Exploration, Inc. | Montana | 55,348 BBLs | 64,021 MCF | Jan 1991 - Jul 2025 |
| Ridge Oil & Gas, LLC | Montana | 5,346 BBLs | 813,984 MCF | Feb 2022 - Jul 2025 |
| Sinclair Oil & Gas Company | Montana | 1,701 BBLs | 3,327 MCF | Dec 1995 - Jul 2025 |
| Slawson Exploration Company Inc | Montana | 12,580 BBLs | 35,649 MCF | Jun 1993 - Jul 2025 |
| True Oil LLC | Montana | 8,859 BBLs | 9,596 MCF | Jan 1986 - Jul 2025 |
| Vecta Oil & Gas, LTD. | Montana | 222 BBLs | 0 MCF | Feb 2013 - Jul 2025 |
| White Rock Oil & Gas, LLC | Montana | 121,691 BBLs | 122,224 MCF | Jan 2015 - Jul 2025 |
| Whiting Oil And Gas Corporation | Montana | 36,949 BBLs | 53,323 MCF | Oct 2003 - Jul 2025 |