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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| 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 | 106,404 BBLs | 7,422,633 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 | 16,782 BBLs | 0 MCF | Jan 1982 - Sep 2025 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missaukee Oil And Gas Company LLC | Michigan | 6,220 BBLs | 7,799 MCF | Sep 2019 - Aug 2025 |
| Missouri River Resources ND, LLC | North Dakota | 6,576 BBLs | 38,343 MCF | Nov 2014 - Sep 2025 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 196 BBLs | 619,935 MCF | Aug 1976 - Jul 2025 |
| Mogo Reagan, LLC | Montana | 3,568 BBLs | 11,909 MCF | Nov 2019 - Aug 2025 |
| Moncrief W A Jr | Wyoming | 743 BBLs | 22,096 MCF | Jan 1978 - Sep 2025 |
| Montalban Oil & Gas Operations, Inc. | Montana | 2,794 BBLs | 66,435 MCF | Jan 1991 - Aug 2025 |
| Morningstar Operating LLC | Colorado | 0 BBLs | 175,716 MCF | Jun 2001 - Aug 2025 |
| Morningstar Operating LLC | Montana | 237,305 BBLs | 472,904 MCF | Jan 2024 - Aug 2025 |
| Morningstar Operating LLC | New Mexico | 116,804 BBLs | 3,270,761 MCF | Sep 2020 - Aug 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 | 8,734 BBLs | 54,159 MCF | Mar 2021 - Aug 2025 |
| MTM Petroleum, Inc. | Kansas | 472 BBLs | 20,006 MCF | Jan 1980 - Jun 2025 |
| Mull Drilling Company Inc | Colorado | 21,728 BBLs | 133,473 MCF | Jan 1999 - Aug 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 | 26,525 BBLs | 351,003 MCF | Jan 2021 - Aug 2025 |
| Mustang Energy Corporation | Kansas | 5,660 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Mustang Holding, LLC (Finnex) | Alaska | 39,468 BBLs | 60,060 MCF | Dec 2024 - Sep 2025 |
| Mustang Resources LLC | New Mexico | 139 BBLs | 107,647 MCF | Sep 2018 - Aug 2025 |
| Mustang Resources LLC | Wyoming | 1,050 BBLs | 191,560 MCF | Nov 2014 - Aug 2025 |
| Muzyl Oil Corp | Michigan | 52 BBLs | 183,584 MCF | Nov 2016 - Sep 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 | 855 BBLs | 8,167 MCF | Feb 1978 - Sep 2025 |
| Navigation Powder River LLC | Wyoming | 15,872 BBLs | 71,504 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 | 1,897,738 MCF | Jan 2023 - Sep 2025 |
| New Age Oil LLC | Kansas | 2,979 BBLs | 91 MCF | Feb 1982 - Jun 2025 |
| New Era Petroleum Inc | Wyoming | 2,035 BBLs | 0 MCF | Feb 2010 - Sep 2025 |
| New Horizon Resources LLC | Montana | 8,178 BBLs | 435 MCF | Feb 2022 - Aug 2025 |
| New Millennium Resources, Inc. | North Dakota | 1,384 BBLs | 90 MCF | Apr 2002 - Sep 2025 |
| Nnogc Exploration & Production, LLC | Utah | 12,101 BBLs | 26,767 MCF | Nov 2012 - Sep 2025 |
| Noble Energy Inc | Colorado | 2,512,365 BBLs | 19,359,662 MCF | Jan 1999 - Aug 2025 |
| Norstar Petroleum, Inc. | Kansas | 2,110 BBLs | 67 MCF | Jan 1980 - Jun 2025 |
| North Fork Operating, LP | New Mexico | 3,622 BBLs | 42,108 MCF | Jan 2020 - Aug 2025 |
| North Shore Exploration & Prod LLC | Wyoming | 13,182 BBLs | 309,565 MCF | May 2015 - Sep 2025 |
| North Shore Exploration & Production, LLC | Utah | 362 BBLs | 31,243 MCF | Oct 2019 - Sep 2025 |
| North Silo Resources LLC | Wyoming | 131,008 BBLs | 206,648 MCF | Sep 2019 - Sep 2025 |