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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Citation Oil & Gas Corp. | Montana | 14,672 BBLs | 897 MCF | Jan 1991 - Feb 2026 |
| Continental Resources Inc | Montana | 156,809 BBLs | 295,948 MCF | Jan 1991 - Feb 2026 |
| Darrah Oil Company, LLC | Montana | 176 BBLs | 0 MCF | Sep 2007 - Feb 2026 |
| Devon Energy Williston, L.L.C. | Montana | 249,821 BBLs | 251,951 MCF | Apr 2021 - Feb 2026 |
| Digital Operating Company LLC | Montana | 124 BBLs | 0 MCF | Jun 2021 - Mar 2026 |
| Foundation Energy Management, LLC | Montana | 1,033 BBLs | 634 MCF | Jan 2016 - Feb 2026 |
| Granite Creek Energy LLC | Montana | 6,855 BBLs | 3,903 MCF | Mar 2024 - Feb 2026 |
| Green Valley Operating, LLC | Montana | 2,274 BBLs | 1,958 MCF | Jun 2022 - Feb 2026 |
| Kraken Operating, LLC | Montana | 629,003 BBLs | 1,102,443 MCF | Sep 2013 - Feb 2026 |
| Oasis Petroleum North America LLC | Montana | 58,282 BBLs | 62,147 MCF | Mar 2007 - Feb 2026 |
| Phoenix Operating LLC | Montana | 58,215 BBLs | 102,854 MCF | Nov 2024 - Feb 2026 |
| Prima Exploration, Inc. | Montana | 50,135 BBLs | 73,978 MCF | Jan 1991 - Feb 2026 |
| R3 Operating Corporation | Montana | 1,465 BBLs | 297 MCF | May 2024 - Feb 2026 |
| Ridge Oil & Gas, LLC | Montana | 4,418 BBLs | 707,479 MCF | Feb 2022 - Feb 2026 |
| Samson Oil And Gas USA, Inc. | Montana | 9,674 BBLs | 5,368 MCF | May 2012 - Feb 2026 |
| Sinclair Oil & Gas Company | Montana | 990 BBLs | 1,912 MCF | Dec 1995 - Feb 2026 |
| Slawson Exploration Company Inc | Montana | 11,179 BBLs | 25,941 MCF | Jun 1993 - Feb 2026 |
| True Oil LLC | Montana | 7,030 BBLs | 5,111 MCF | Jan 1986 - Feb 2026 |
| White Rock Oil & Gas, LLC | Montana | 189,580 BBLs | 158,323 MCF | Jan 2015 - Feb 2026 |