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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Messer LLC | Colorado | 0 BBLs | 119,979 MCF | Jan 1999 - Aug 2026 |
| Mewbourne Oil Co | New Mexico | 8,707,828 BBLs | 40,767,165 MCF | Jan 1993 - Aug 2026 |
| Mi3 Energy LLC | Wyoming | 19,062 BBLs | 4,563 MCF | Nov 2025 - Sep 2026 |
| Michael D. Weilert Oil Company | Kansas | 1,389 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Mid-Con Energy Operating LLC | Wyoming | 6,059 BBLs | 1,484 MCF | Feb 2017 - Sep 2026 |
| Mid-Continent Resources, Inc. | Kansas | 1,627 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Mid-South Trading, Inc. | Louisiana | 2,454 BBLs | 0 MCF | Dec 1995 - Jan 2025 |
| Midway Energy, LLC | Montana | 1,812 BBLs | 0 MCF | Mar 2019 - Jul 2026 |
| Mike Kelso Oil, Inc. | Kansas | 12,698 BBLs | 122,190 MCF | Jan 1980 - Jun 2026 |
| Mikol Oil LLC | Kansas | 1,136 BBLs | 0 MCF | Feb 2009 - Jun 2026 |
| Miller Energy Company II LLC | Michigan | 14,137 BBLs | 0 MCF | Jan 1982 - Aug 2026 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missouri River Resources ND, LLC | North Dakota | 5,749 BBLs | 34,746 MCF | Nov 2014 - Aug 2026 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 0 BBLs | 657,326 MCF | Aug 1976 - Aug 2026 |
| Mogo Reagan, LLC | Montana | 3,443 BBLs | 9,208 MCF | Nov 2019 - Aug 2026 |
| Moncrief W A Jr | Wyoming | 570 BBLs | 22,286 MCF | Jan 1978 - Aug 2026 |
| Montalban Oil & Gas Operations, Inc. | Montana | 2,768 BBLs | 68,439 MCF | Jan 1991 - Aug 2026 |
| Morgenstern Oil Operations LLC | Kansas | 1,766 BBLs | 0 MCF | Jan 2020 - Jun 2026 |
| Morningstar Operating LLC | Colorado | 0 BBLs | 181,073 MCF | Jun 2001 - Jul 2026 |
| Morningstar Operating LLC | Montana | 268,459 BBLs | 437,710 MCF | Jan 2024 - Jul 2026 |
| Morningstar Operating LLC | New Mexico | 110,254 BBLs | 3,151,807 MCF | Sep 2020 - Aug 2026 |
| Morningstar Operating LLC | North Dakota | 37,054 BBLs | 40,206 MCF | Oct 2024 - Aug 2026 |
| Mosbacher Energy Company | Mississippi | 13,154 BBLs | 6,810 MCF | Dec 1976 - Aug 2026 |
| Mr NM Operating LLC | New Mexico | 7,049 BBLs | 49,172 MCF | Mar 2021 - Aug 2026 |
| MTM Petroleum, Inc. | Kansas | 1,014 BBLs | 20,977 MCF | Jan 1980 - Jun 2026 |
| Mull Drilling Company Inc | Colorado | 22,482 BBLs | 185,410 MCF | Jan 1999 - Jul 2026 |
| Mull Drilling Company, Inc. | Kansas | 16,617 BBLs | 9,052 MCF | Jan 1980 - Jun 2026 |
| Mulloy Operating, Inc. | New Mexico | 5,477 BBLs | 6,417 MCF | Jul 2006 - Aug 2026 |
| Murex Petroleum Corporation | North Dakota | 162,799 BBLs | 483,253 MCF | Apr 2001 - Aug 2026 |
| Murfin Drilling Co., Inc. | Kansas | 77,266 BBLs | 1,658 MCF | Jan 1980 - Jun 2026 |
| Murfin Drilling Company, Inc. | North Dakota | 46,135 BBLs | 27,130 MCF | Feb 2025 - Aug 2026 |
| Murphrey Oil Company, Inc. | Louisiana | 3,563 BBLs | 0 MCF | Feb 2020 - Jan 2025 |
| Mustang Energy Corporation | Kansas | 7,914 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Mustang Holding, LLC (Finnex) | Alaska | 20,404 BBLs | 25,293 MCF | Dec 2024 - Feb 2026 |
| Mustang Resources LLC | New Mexico | 54 BBLs | 85,687 MCF | Sep 2018 - Aug 2026 |
| Mustang Resources LLC | Wyoming | 1,224 BBLs | 151,320 MCF | Nov 2014 - Aug 2026 |
| Muzyl Oil Corp | Michigan | 35 BBLs | 164,074 MCF | Nov 2016 - Aug 2026 |
| MWK Petroleum, LLC | Kansas | 2,207 BBLs | 0 MCF | Jan 2020 - Jun 2026 |
| Nadel And Gussman LLC | Kansas | 1,644 BBLs | 2,733 MCF | Jan 1980 - Jun 2026 |
| Nadel And Gussman Ruston, LLC | Louisiana | 7,961 BBLs | 1,173,013 MCF | Mar 2012 - Dec 2024 |
| Natural Gas Processing Company | Wyoming | 1,786 BBLs | 3,676 MCF | Feb 1978 - Aug 2026 |
| Navigation Powder River LLC | Wyoming | 13,185 BBLs | 62,251 MCF | Dec 2016 - Aug 2026 |
| Nec Operating - Kansas, LLC | Kansas | 1,448 BBLs | 4,102 MCF | Jan 2020 - Jun 2026 |
| Neptune Operating LLC | North Dakota | 556,031 BBLs | 1,509,549 MCF | Jan 2023 - Aug 2026 |
| New Age Oil LLC | Kansas | 1,661 BBLs | 0 MCF | Feb 1982 - Jun 2026 |
| New Era Petroleum Inc | Wyoming | 1,658 BBLs | 0 MCF | Feb 2010 - Aug 2026 |
| New Horizon Resources LLC | Kansas | 1,134 BBLs | 0 MCF | Jan 2020 - Jun 2026 |
| Nnogc Exploration & Production, LLC | Utah | 9,881 BBLs | 26,054 MCF | Nov 2012 - Aug 2026 |
| Noble Energy Inc | Colorado | 2,749,237 BBLs | 19,334,924 MCF | Jan 1999 - Jul 2026 |
| Norstar Petroleum, Inc. | Kansas | 1,148 BBLs | 0 MCF | Jan 1980 - Jun 2026 |