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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Mike Kelso Oil, Inc. | Kansas | 9,718 BBLs | 85,148 MCF | Jan 1980 - Feb 2025 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missouri River Resources ND, LLC | North Dakota | 8,815 BBLs | 31,862 MCF | Nov 2014 - Apr 2025 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 459 BBLs | 723,777 MCF | Aug 1976 - Mar 2025 |
| Mogo Reagan, LLC | Montana | 2,877 BBLs | 9,126 MCF | Nov 2019 - Apr 2025 |
| Molitor Oil, Inc. | Kansas | 1,101 BBLs | 5,213 MCF | Jan 1980 - Feb 2025 |
| Moncrief W A Jr | Wyoming | 247 BBLs | 21,139 MCF | Jan 1978 - Apr 2025 |
| Montalban Oil & Gas Operations, Inc. | Montana | 2,835 BBLs | 63,308 MCF | Jan 1991 - Apr 2025 |
| Morningstar Operating LLC | Colorado | 0 BBLs | 175,475 MCF | Jun 2020 - Apr 2025 |
| Morningstar Operating LLC | Montana | 118,538 BBLs | 209,111 MCF | Jan 2024 - Apr 2025 |
| Morningstar Operating LLC | New Mexico | 117,303 BBLs | 3,087,299 MCF | Sep 2020 - Apr 2025 |
| Morningstar Operating LLC | North Dakota | 31,174 BBLs | 39,819 MCF | Oct 2024 - Apr 2025 |
| Mr NM Operating LLC | New Mexico | 9,460 BBLs | 42,477 MCF | Mar 2021 - Apr 2025 |
| MTM Petroleum, Inc. | Kansas | 692 BBLs | 18,646 MCF | Jan 1980 - Feb 2025 |
| Mull Drilling Company, Inc. | Kansas | 16,052 BBLs | 19,924 MCF | Jan 1980 - Feb 2025 |
| Murex Petroleum Corporation | North Dakota | 184,464 BBLs | 495,446 MCF | Apr 2001 - Apr 2025 |
| Murfin Drilling Co., Inc. | Kansas | 71,109 BBLs | 1,793 MCF | Jan 1980 - Feb 2025 |
| Murphrey Oil Company, Inc. | Louisiana | 3,563 BBLs | 0 MCF | Feb 2020 - Jan 2025 |
| Mustang Energy Corporation | Kansas | 4,749 BBLs | 0 MCF | Jan 1980 - Feb 2025 |
| Mustang Holding, LLC (Finnex) | Alaska | 13,654 BBLs | 26,488 MCF | Dec 2024 - Apr 2025 |
| Mustang Resources LLC | New Mexico | 234 BBLs | 115,450 MCF | Sep 2018 - Apr 2025 |
| Mustang Resources LLC | Wyoming | 1,526 BBLs | 194,783 MCF | Nov 2014 - Apr 2025 |
| Muzyl Oil Corp | Michigan | 28 BBLs | 165,655 MCF | Nov 2016 - May 2025 |
| MW Oil, Inc | Kansas | 1,123 BBLs | 0 MCF | Jan 2020 - Feb 2025 |
| MWK Petroleum, LLC | Kansas | 1,760 BBLs | 0 MCF | Jan 2020 - Feb 2025 |
| N-10 Exploration, LLC | Kansas | 1,422 BBLs | 52,609 MCF | Jan 2010 - Feb 2025 |
| Nadel And Gussman LLC | Kansas | 2,147 BBLs | 1,959 MCF | Jan 1980 - Feb 2025 |
| Nadel And Gussman Ruston, LLC | Louisiana | 7,961 BBLs | 1,173,013 MCF | Mar 2012 - Dec 2024 |
| Natural Gas Processing Company | Wyoming | 2,119 BBLs | 13,530 MCF | Feb 1978 - Apr 2025 |
| Navigation Powder River LLC | Wyoming | 15,624 BBLs | 51,090 MCF | Dec 2016 - Apr 2025 |
| Nec Operating - Kansas, LLC | Kansas | 3,311 BBLs | 4,890 MCF | Jan 2020 - Feb 2025 |
| Neptune Operating LLC | Montana | 973 BBLs | 1,774 MCF | Oct 2022 - Apr 2025 |
| Neptune Operating LLC | North Dakota | 994,824 BBLs | 2,172,221 MCF | Jan 2023 - Apr 2025 |
| New Age Oil LLC | Kansas | 1,918 BBLs | 67 MCF | Feb 1982 - Feb 2025 |
| New Era Petroleum Inc | Wyoming | 2,021 BBLs | 0 MCF | Feb 2010 - Apr 2025 |
| New Horizon Resources LLC | Kansas | 1,469 BBLs | 0 MCF | Jan 2020 - Feb 2025 |
| New Millennium Resources, Inc. | North Dakota | 1,539 BBLs | 82 MCF | Apr 2002 - Apr 2025 |
| Nnogc Exploration & Production, LLC | Utah | 13,996 BBLs | 34,022 MCF | Nov 2012 - Apr 2025 |
| Noble Energy Inc | Colorado | 2,612,660 BBLs | 18,635,528 MCF | Jan 1997 - Apr 2025 |
| Norstar Petroleum, Inc. | Kansas | 1,102 BBLs | 84 MCF | Jan 1980 - Feb 2025 |
| North Fork Operating, LP | New Mexico | 3,611 BBLs | 55,217 MCF | Jan 2020 - Apr 2025 |
| North Shore Exploration & Prod LLC | Wyoming | 10,056 BBLs | 725,723 MCF | May 2015 - Apr 2025 |
| North Shore Exploration & Production, LLC | Utah | 345 BBLs | 50,425 MCF | Oct 2019 - Apr 2025 |
| North Silo Resources LLC | Wyoming | 150,458 BBLs | 234,914 MCF | Sep 2019 - Apr 2025 |
| North Slope Borough | Alaska | 0 BBLs | 136,009 MCF | Sep 1950 - May 2025 |
| Northern Lights Oil Company, LLC | Kansas | 1,621 BBLs | 476 MCF | Jan 1980 - Feb 2025 |
| Northern Oil Production, Inc. | Montana | 5,890 BBLs | 2,581 MCF | May 1992 - Apr 2025 |
| Northwestern Corporation | Montana | 388 BBLs | 348,210 MCF | Apr 2004 - Apr 2025 |
| Novo Oil & Gas Northern Delaware, LLC | New Mexico | 538,523 BBLs | 4,537,168 MCF | Feb 2018 - Apr 2025 |
| Novy Oil & Gas, Inc. | Kansas | 2,769 BBLs | 0 MCF | Jan 1980 - Feb 2025 |