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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Michael D. Weilert Oil Company | Kansas | 1,491 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Mid-Con Energy Operating LLC | Wyoming | 7,409 BBLs | 2,465 MCF | Feb 2017 - Oct 2025 |
| Mid-Continent Resources, Inc. | Kansas | 1,279 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Mid-South Trading, Inc. | Louisiana | 2,454 BBLs | 0 MCF | Dec 1995 - Jan 2025 |
| Middle Fork Energy Uinta, LLC | Utah | 107,386 BBLs | 7,405,635 MCF | Sep 2018 - Sep 2025 |
| Mike Kelso Oil, Inc. | Kansas | 9,954 BBLs | 76,711 MCF | Jan 1980 - Jun 2025 |
| Miller Energy Company II LLC | Michigan | 16,262 BBLs | 0 MCF | Jan 1982 - Oct 2025 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missouri River Resources ND, LLC | North Dakota | 6,576 BBLs | 38,343 MCF | Nov 2014 - Sep 2025 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 400 BBLs | 739,023 MCF | Aug 1976 - Sep 2025 |
| Mogo Reagan, LLC | Montana | 3,500 BBLs | 11,020 MCF | Nov 2019 - Sep 2025 |
| Molitor Oil, Inc. | Kansas | 808 BBLs | 7,488 MCF | Jan 1980 - Jun 2025 |
| Moncrief W A Jr | Wyoming | 778 BBLs | 22,362 MCF | Jan 1978 - Sep 2025 |
| Montalban Oil & Gas Operations, Inc. | Montana | 3,011 BBLs | 66,958 MCF | Jan 1991 - Sep 2025 |
| Morningstar Operating LLC | Colorado | 0 BBLs | 181,407 MCF | Jun 2001 - Sep 2025 |
| Morningstar Operating LLC | Montana | 266,322 BBLs | 406,705 MCF | Jan 2024 - Sep 2025 |
| Morningstar Operating LLC | New Mexico | 114,784 BBLs | 3,131,549 MCF | Sep 2020 - Sep 2025 |
| Morningstar Operating LLC | North Dakota | 29,753 BBLs | 39,482 MCF | Oct 2024 - Sep 2025 |
| Mosbacher Energy Company | Mississippi | 12,740 BBLs | 5,048 MCF | Dec 1976 - Aug 2025 |
| Mr NM Operating LLC | New Mexico | 8,424 BBLs | 53,356 MCF | Mar 2021 - Sep 2025 |
| MTM Petroleum, Inc. | Kansas | 472 BBLs | 20,006 MCF | Jan 1980 - Jun 2025 |
| Mull Drilling Company Inc | Colorado | 22,129 BBLs | 147,978 MCF | Jan 1999 - Sep 2025 |
| Mull Drilling Company, Inc. | Kansas | 19,204 BBLs | 22,222 MCF | Jan 1980 - Jun 2025 |
| Murex Petroleum Corporation | North Dakota | 221,980 BBLs | 553,968 MCF | Apr 2001 - Sep 2025 |
| Murfin Drilling Co., Inc. | Kansas | 79,246 BBLs | 1,238 MCF | Jan 1980 - Jun 2025 |
| Murfin Drilling Company, Inc. | North Dakota | 13,967 BBLs | 9,953 MCF | Mar 2025 - Sep 2025 |
| Murphrey Oil Company, Inc. | Louisiana | 3,563 BBLs | 0 MCF | Feb 2020 - Jan 2025 |
| Muskegon Operating Company LLC | Michigan | 27,438 BBLs | 347,546 MCF | Jan 2021 - Sep 2025 |
| Mustang Energy Corporation | Kansas | 5,660 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Mustang Holding, LLC (Finnex) | Alaska | 37,141 BBLs | 36,950 MCF | Dec 2024 - Sep 2025 |
| Mustang Resources LLC | New Mexico | 0 BBLs | 102,444 MCF | Sep 2018 - Sep 2025 |
| Mustang Resources LLC | Wyoming | 834 BBLs | 168,794 MCF | Nov 2014 - Sep 2025 |
| Muzyl Oil Corp | Michigan | 154 BBLs | 182,245 MCF | Nov 2016 - Oct 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 | 1,051 BBLs | 7,001 MCF | Feb 1978 - Oct 2025 |
| Navigation Powder River LLC | Wyoming | 14,707 BBLs | 67,193 MCF | Dec 2016 - Sep 2025 |
| Nec Operating - Kansas, LLC | Kansas | 3,006 BBLs | 5,097 MCF | Jan 2020 - Jun 2025 |
| Neptune Operating LLC | North Dakota | 774,292 BBLs | 1,897,739 MCF | Jan 2023 - Sep 2025 |
| New Age Oil LLC | Kansas | 2,979 BBLs | 91 MCF | Feb 1982 - Jun 2025 |
| New Era Petroleum Inc | Wyoming | 2,154 BBLs | 0 MCF | Feb 2010 - Sep 2025 |
| New Horizon Resources LLC | Montana | 7,571 BBLs | 425 MCF | Feb 2022 - Sep 2025 |
| New Millennium Resources, Inc. | North Dakota | 1,384 BBLs | 90 MCF | Apr 2002 - Oct 2025 |
| Nnogc Exploration & Production, LLC | Utah | 12,052 BBLs | 26,167 MCF | Nov 2012 - Sep 2025 |
| Noble Energy Inc | Colorado | 2,558,919 BBLs | 19,046,845 MCF | Jan 1999 - Sep 2025 |
| Norstar Petroleum, Inc. | Kansas | 2,110 BBLs | 67 MCF | Jan 1980 - Jun 2025 |
| North Fork Operating, LP | New Mexico | 3,722 BBLs | 42,408 MCF | Jan 2020 - Sep 2025 |
| North Shore Exploration & Prod LLC | Wyoming | 10,204 BBLs | 301,072 MCF | May 2015 - Sep 2025 |