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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Armstrong Operating, Inc. | Montana | 776 BBLs | 48 MCF | Feb 1995 - Mar 2026 |
| Citation Oil & Gas Corp. | Montana | 16,600 BBLs | 915 MCF | Jan 1991 - Mar 2026 |
| Continental Resources Inc | Montana | 163,663 BBLs | 323,884 MCF | Jan 1991 - Mar 2026 |
| Devon Energy Williston, L.L.C. | Montana | 232,997 BBLs | 224,565 MCF | Apr 2021 - Mar 2026 |
| Digital Operating Company LLC | Montana | 240 BBLs | 0 MCF | Jun 2021 - Mar 2026 |
| Empire North Dakota LLC | Montana | 1,290 BBLs | 329 MCF | Jul 2019 - Mar 2026 |
| Kraken Operating, LLC | Montana | 778,411 BBLs | 1,273,635 MCF | Sep 2013 - Mar 2026 |
| Montana Heartland LLC | Montana | 547 BBLs | 2,855 MCF | Jun 1991 - Mar 2026 |
| Morningstar Operating LLC | Montana | 348,682 BBLs | 528,921 MCF | Jan 2024 - Mar 2026 |
| Murex Petroleum Corp. | Montana | 53 BBLs | 0 MCF | Jan 2001 - Apr 2026 |
| Oasis Petroleum North America LLC | Montana | 55,535 BBLs | 59,098 MCF | Mar 2007 - Mar 2026 |
| Petro-Hunt, LLC | Montana | 30,889 BBLs | 33,812 MCF | Jan 1991 - Mar 2026 |
| Prima Exploration, Inc. | Montana | 56,103 BBLs | 80,569 MCF | Jan 1991 - Mar 2026 |
| R3 Operating Corporation | Montana | 3,450 BBLs | 100 MCF | May 2024 - Mar 2026 |
| Ridge Oil & Gas, LLC | Montana | 5,586 BBLs | 775,202 MCF | Feb 2022 - Mar 2026 |
| Rim Operating, Inc. | Montana | 7,178 BBLs | 3,771 MCF | Jan 1991 - Mar 2026 |
| Samson Oil And Gas USA, Inc. | Montana | 10,380 BBLs | 5,794 MCF | May 2012 - Mar 2026 |
| Sinclair Oil & Gas Company | Montana | 1,380 BBLs | 2,116 MCF | Dec 1995 - Mar 2026 |
| Slawson Exploration Company Inc | Montana | 12,338 BBLs | 29,274 MCF | Jun 1993 - Mar 2026 |
| Swanson Oil & Gas LLC | Montana | 1,160 BBLs | 1,604 MCF | Mar 2025 - Mar 2026 |
| True Oil LLC | Montana | 6,785 BBLs | 4,766 MCF | Jan 1986 - Mar 2026 |
| Wesco Operating, Inc. | Montana | 5,702 BBLs | 2,875 MCF | Jun 1999 - Mar 2026 |
| White Rock Oil & Gas, LLC | Montana | 200,979 BBLs | 175,114 MCF | Jan 2015 - Mar 2026 |
| Whiting Oil And Gas Corporation | Montana | 33,831 BBLs | 43,664 MCF | Oct 2003 - Mar 2026 |