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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Mike Kelso Oil, Inc. | Kansas | 9,954 BBLs | 76,711 MCF | Jan 1980 - Jun 2025 |
| Miller Energy Company II LLC | Michigan | 16,418 BBLs | 0 MCF | Jan 1982 - Oct 2025 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missaukee Oil And Gas Company LLC | Michigan | 6,968 BBLs | 6,337 MCF | Sep 2019 - Oct 2025 |
| Missouri River Resources ND, LLC | North Dakota | 6,710 BBLs | 36,497 MCF | Nov 2014 - Nov 2025 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 69 BBLs | 526,250 MCF | Aug 1976 - Oct 2025 |
| Mogo Reagan, LLC | Montana | 3,299 BBLs | 10,869 MCF | Nov 2019 - Oct 2025 |
| Molitor Oil, Inc. | Kansas | 808 BBLs | 7,488 MCF | Jan 1980 - Jun 2025 |
| Momentum Operating Co Inc | New Mexico | 501 BBLs | 11,069 MCF | Dec 2000 - Nov 2025 |
| Moncrief W A Jr | Wyoming | 911 BBLs | 22,610 MCF | Jan 1978 - Oct 2025 |
| Montalban Oil & Gas Operations, Inc. | Montana | 2,628 BBLs | 12,407 MCF | Jan 1991 - Oct 2025 |
| Morgan E&P, LLC | North Dakota | 2,401 BBLs | 1,260 MCF | Dec 2023 - Nov 2025 |
| Morningstar Operating LLC | Colorado | 0 BBLs | 183,549 MCF | Jun 2001 - Oct 2025 |
| Morningstar Operating LLC | Montana | 316,325 BBLs | 449,571 MCF | Jan 2024 - Oct 2025 |
| Morningstar Operating LLC | New Mexico | 119,633 BBLs | 3,276,795 MCF | Sep 2020 - Oct 2025 |
| Morningstar Operating LLC | North Dakota | 30,266 BBLs | 38,076 MCF | Oct 2024 - Nov 2025 |
| Mosbacher Energy Company | Mississippi | 16,914 BBLs | 6,895 MCF | Dec 1976 - Nov 2025 |
| Mr NM Operating LLC | New Mexico | 8,503 BBLs | 41,319 MCF | Mar 2021 - Nov 2025 |
| MTM Petroleum, Inc. | Kansas | 472 BBLs | 20,006 MCF | Jan 1980 - Jun 2025 |
| Mull Drilling Company, Inc. | Kansas | 19,204 BBLs | 22,222 MCF | Jan 1980 - Jun 2025 |
| Murex Petroleum Corporation | North Dakota | 177,428 BBLs | 512,059 MCF | Apr 2001 - Nov 2025 |
| Murfin Drilling Co., Inc. | Kansas | 79,246 BBLs | 1,238 MCF | Jan 1980 - Jun 2025 |
| Murfin Drilling Company, Inc. | North Dakota | 13,173 BBLs | 9,551 MCF | Mar 2025 - Nov 2025 |
| Murphrey Oil Company, Inc. | Louisiana | 3,563 BBLs | 0 MCF | Feb 2020 - Jan 2025 |
| Muskegon Operating Company LLC | Michigan | 27,706 BBLs | 330,297 MCF | Jan 2021 - Oct 2025 |
| Mustang Energy Corporation | Kansas | 5,660 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Mustang Holding, LLC (Finnex) | Alaska | 32,343 BBLs | 45,938 MCF | Dec 2024 - Nov 2025 |
| Mustang Resources LLC | New Mexico | 67 BBLs | 3,853,784 MCF | Sep 2018 - Oct 2025 |
| Mustang Resources LLC | Wyoming | 1,635 BBLs | 272,048 MCF | Nov 2014 - Oct 2025 |
| Muzyl Oil Corp | Michigan | 0 BBLs | 161,638 MCF | Nov 2016 - Nov 2025 |
| MWK Petroleum, LLC | Kansas | 2,108 BBLs | 0 MCF | Jan 2020 - Jun 2025 |
| N-10 Exploration, LLC | Kansas | 1,553 BBLs | 52,292 MCF | Jan 2010 - Jun 2025 |
| Nadel And Gussman LLC | Kansas | 1,982 BBLs | 3,252 MCF | Jan 1980 - Jun 2025 |
| Nadel And Gussman Ruston, LLC | Louisiana | 7,961 BBLs | 1,173,013 MCF | Mar 2012 - Dec 2024 |
| Natural Gas Processing Company | Wyoming | 1,402 BBLs | 10,150 MCF | Feb 1978 - Nov 2025 |
| Navigation Powder River LLC | Wyoming | 16,125 BBLs | 72,097 MCF | Dec 2016 - Oct 2025 |
| Nec Operating - Kansas, LLC | Kansas | 3,006 BBLs | 5,097 MCF | Jan 2020 - Jun 2025 |
| Neptune Operating LLC | North Dakota | 693,944 BBLs | 1,716,318 MCF | Jan 2023 - Nov 2025 |
| New Age Oil LLC | Kansas | 2,979 BBLs | 91 MCF | Feb 1982 - Jun 2025 |
| New Era Petroleum Inc | Wyoming | 2,139 BBLs | 0 MCF | Feb 2010 - Oct 2025 |
| Nnogc Exploration & Production, LLC | Utah | 12,572 BBLs | 29,076 MCF | Nov 2012 - Nov 2025 |
| Noble Energy Inc | Colorado | 2,671,021 BBLs | 19,943,471 MCF | Jan 1999 - Oct 2025 |
| Norstar Petroleum, Inc. | Kansas | 2,110 BBLs | 67 MCF | Jan 1980 - Jun 2025 |
| North Fork Operating, LP | New Mexico | 2,999 BBLs | 41,126 MCF | Jan 2020 - Oct 2025 |
| North Shore Exploration & Prod LLC | Wyoming | 5,969 BBLs | 208,532 MCF | May 2015 - Oct 2025 |
| North Silo Resources LLC | Wyoming | 121,215 BBLs | 199,930 MCF | Sep 2019 - Oct 2025 |
| North Slope Borough | Alaska | 0 BBLs | 115,071 MCF | Sep 1950 - Nov 2025 |
| Northern Lights Oil Company, LLC | Kansas | 1,442 BBLs | 593 MCF | Jan 1980 - Jun 2025 |
| Northern Oil Production, Inc. | Montana | 6,170 BBLs | 2,173 MCF | May 1992 - Oct 2025 |
| Northwestern Corporation | Montana | 597 BBLs | 321,118 MCF | Apr 2004 - Oct 2025 |