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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Citation Oil & Gas Corp. | Montana | 15,642 BBLs | 978 MCF | Jan 1991 - Sep 2025 |
| Continental Resources Inc | Montana | 242,469 BBLs | 371,107 MCF | Jan 1991 - Sep 2025 |
| CWT Operating, LLC | Montana | 752 BBLs | 20 MCF | Dec 2021 - Sep 2025 |
| Darrah Oil Company, LLC | Montana | 868 BBLs | 0 MCF | Sep 2007 - Sep 2025 |
| Devon Energy Williston, L.L.C. | Montana | 160,708 BBLs | 137,982 MCF | Apr 2021 - Sep 2025 |
| Digital Operating Company LLC | Montana | 1,154 BBLs | 9 MCF | Jun 2021 - Sep 2025 |
| Foundation Energy Management, LLC | Montana | 332 BBLs | 285 MCF | Jan 2016 - Sep 2025 |
| Green Valley Operating, LLC | Montana | 3,032 BBLs | 1,977 MCF | Jun 2022 - Sep 2025 |
| Kraken Operating, LLC | Montana | 867,560 BBLs | 1,336,068 MCF | Sep 2013 - Sep 2025 |
| Oasis Petroleum North America LLC | Montana | 41,462 BBLs | 37,647 MCF | Mar 2007 - Sep 2025 |
| Phoenix Operating LLC | Montana | 117,730 BBLs | 130,841 MCF | Dec 2024 - Sep 2025 |
| Prima Exploration, Inc. | Montana | 53,521 BBLs | 61,532 MCF | Jan 1991 - Sep 2025 |
| R3 Operating Corporation | Montana | 7,230 BBLs | 4,770 MCF | May 2024 - Sep 2025 |
| Ridge Oil & Gas, LLC | Montana | 6,077 BBLs | 785,560 MCF | Feb 2022 - Sep 2025 |
| Sinclair Oil & Gas Company | Montana | 1,881 BBLs | 1,723 MCF | Dec 1995 - Sep 2025 |
| Slawson Exploration Company Inc | Montana | 12,431 BBLs | 24,391 MCF | Jun 1993 - Sep 2025 |
| Stearns Oil Company LLC | Montana | 38 BBLs | 27 MCF | Mar 2022 - Sep 2025 |
| True Oil LLC | Montana | 8,511 BBLs | 8,134 MCF | Jan 1986 - Sep 2025 |
| White Rock Oil & Gas, LLC | Montana | 111,060 BBLs | 120,123 MCF | Jan 2015 - Sep 2025 |
| Whiting Oil And Gas Corporation | Montana | 31,836 BBLs | 45,469 MCF | Oct 2003 - Sep 2025 |