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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Missouri River Resources ND, LLC | North Dakota | 5,893 BBLs | 23,890 MCF | Nov 2014 - Feb 2025 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 172 BBLs | 742,721 MCF | Aug 1976 - Jan 2025 |
| Mogo Reagan, LLC | Montana | 3,304 BBLs | 11,531 MCF | Nov 2019 - Jan 2025 |
| Moncrief W A Jr | Wyoming | 1,022 BBLs | 24,681 MCF | Jan 1978 - Feb 2025 |
| Montalban Oil & Gas Operations, Inc. | Montana | 2,821 BBLs | 65,722 MCF | Jan 1991 - Jan 2025 |
| Morningstar Operating LLC | Colorado | 0 BBLs | 183,755 MCF | Jun 2020 - Feb 2025 |
| Morningstar Operating LLC | Montana | 134,327 BBLs | 193,760 MCF | Jan 2024 - Jan 2025 |
| Morningstar Operating LLC | New Mexico | 118,820 BBLs | 3,200,262 MCF | Sep 2020 - Feb 2025 |
| Morningstar Operating LLC | North Dakota | 28,404 BBLs | 35,351 MCF | Oct 2024 - Feb 2025 |
| Mr NM Operating LLC | New Mexico | 11,002 BBLs | 55,226 MCF | Mar 2021 - Feb 2025 |
| MTM Petroleum, Inc. | Kansas | 164 BBLs | 20,181 MCF | Jan 1980 - Dec 2024 |
| Mull Drilling Company Inc | Colorado | 24,148 BBLs | 137,784 MCF | Jan 1999 - Feb 2025 |
| Mull Drilling Company, Inc. | Kansas | 20,490 BBLs | 26,122 MCF | Jan 1980 - Dec 2024 |
| Mulloy Operating, Inc. | New Mexico | 3,187 BBLs | 6,622 MCF | Jul 2006 - Jan 2025 |
| Murex Petroleum Corporation | North Dakota | 174,672 BBLs | 395,414 MCF | Apr 2001 - Feb 2025 |
| Murfin Drilling Co., Inc. | Kansas | 74,361 BBLs | 1,676 MCF | Jan 1980 - Dec 2024 |
| Murphrey Oil Company, Inc. | Louisiana | 3,563 BBLs | 0 MCF | Feb 2020 - Jan 2025 |
| Muskegon Operating Company LLC | Michigan | 25,408 BBLs | 349,273 MCF | Jan 2021 - Feb 2025 |
| Mustang Energy Corporation | Kansas | 4,730 BBLs | 0 MCF | Jan 1980 - Dec 2024 |
| Mustang Resources LLC | New Mexico | 170 BBLs | 129,186 MCF | Sep 2018 - Jan 2025 |
| Mustang Resources LLC | Wyoming | 1,583 BBLs | 206,822 MCF | Nov 2014 - Jan 2025 |
| Muzyl Oil Corp | Michigan | 124 BBLs | 183,270 MCF | Nov 2016 - Feb 2025 |
| MWK Petroleum, LLC | Kansas | 2,082 BBLs | 0 MCF | Jan 2020 - Dec 2024 |
| N-10 Exploration, LLC | Kansas | 1,579 BBLs | 49,958 MCF | Jan 2010 - Dec 2024 |
| Nadel And Gussman LLC | Kansas | 1,803 BBLs | 3,189 MCF | Jan 1980 - Dec 2024 |
| Nadel And Gussman Ruston, LLC | Louisiana | 7,961 BBLs | 1,173,013 MCF | Mar 2012 - Dec 2024 |
| Natural Gas Processing Company | Wyoming | 1,986 BBLs | 12,770 MCF | Feb 1978 - Feb 2025 |
| Nautilus Poplar LLC | Montana | 4,041 BBLs | 0 MCF | Jun 2007 - Jan 2025 |
| Navigation Powder River LLC | Wyoming | 15,814 BBLs | 60,301 MCF | Dec 2016 - Feb 2025 |
| Nec Operating - Kansas, LLC | Kansas | 2,630 BBLs | 4,293 MCF | Jan 2020 - Dec 2024 |
| Neptune Operating LLC | Montana | 1,215 BBLs | 1,622 MCF | Oct 2022 - Jan 2025 |
| Neptune Operating LLC | North Dakota | 814,598 BBLs | 1,832,815 MCF | Jan 2023 - Feb 2025 |
| New Age Oil LLC | Kansas | 1,402 BBLs | 57 MCF | Feb 1982 - Dec 2024 |
| New Era Petroleum Inc | Wyoming | 2,127 BBLs | 0 MCF | Feb 2010 - Feb 2025 |
| New Millennium Resources, Inc. | North Dakota | 1,360 BBLs | 84 MCF | Apr 2002 - Feb 2025 |
| Nnogc Exploration & Production, LLC | Utah | 14,311 BBLs | 20,952 MCF | Nov 2012 - Feb 2025 |
| Noble Energy Inc | Colorado | 2,427,688 BBLs | 18,077,977 MCF | Jan 1997 - Feb 2025 |
| Norstar Petroleum, Inc. | Kansas | 1,402 BBLs | 129 MCF | Jan 1980 - Dec 2024 |
| North Fork Operating, LP | New Mexico | 3,277 BBLs | 51,414 MCF | Jan 2020 - Jan 2025 |
| North Shore Exploration & Prod LLC | Wyoming | 12,150 BBLs | 814,469 MCF | May 2015 - Feb 2025 |
| North Shore Exploration & Production, LLC | Utah | 273 BBLs | 36,674 MCF | Oct 2019 - Feb 2025 |
| North Silo Resources LLC | Wyoming | 174,480 BBLs | 240,521 MCF | Sep 2019 - Jan 2025 |
| North Slope Borough | Alaska | 0 BBLs | 160,830 MCF | Sep 1950 - Feb 2025 |
| Northern Oil Production, Inc. | Montana | 6,243 BBLs | 2,147 MCF | May 1992 - Jan 2025 |
| Northwestern Corporation | Montana | 575 BBLs | 356,421 MCF | Apr 2004 - Jan 2025 |
| Novo Oil & Gas Northern Delaware, LLC | New Mexico | 812,063 BBLs | 4,755,028 MCF | Feb 2018 - Jan 2025 |
| Novy Oil & Gas, Inc. | Kansas | 1,337 BBLs | 7 MCF | Jan 1980 - Dec 2024 |
| Nuevida Resources LLC | Colorado | 0 BBLs | 697,353 MCF | Jul 2023 - Jan 2025 |
| O'Brien Energy Resources Corp. | Kansas | 2,146 BBLs | 33,842 MCF | May 2008 - Dec 2024 |
| Oasis Petroleum North America LLC | Montana | 43,930 BBLs | 63,663 MCF | Mar 2007 - Jan 2025 |