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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Michael D. Weilert Oil Company | Kansas | 1,182 BBLs | 0 MCF | Jan 1980 - May 2025 |
| Mid-Con Energy Operating LLC | Wyoming | 7,242 BBLs | 1,915 MCF | Feb 2017 - Jul 2025 |
| Mid-Continent Resources, Inc. | Kansas | 1,609 BBLs | 0 MCF | Jan 1980 - May 2025 |
| Mid-South Trading, Inc. | Louisiana | 2,454 BBLs | 0 MCF | Dec 1995 - Jan 2025 |
| Middle Fork Energy Uinta, LLC | Utah | 106,599 BBLs | 7,629,251 MCF | Sep 2018 - Jul 2025 |
| Midland Operating Inc. | New Mexico | 1,207 BBLs | 0 MCF | May 1995 - Jun 2025 |
| Mike Kelso Oil, Inc. | Kansas | 9,158 BBLs | 80,757 MCF | Jan 1980 - May 2025 |
| Miller Energy Company II LLC | Michigan | 16,521 BBLs | 0 MCF | Jan 1982 - Jul 2025 |
| Mineral Ventures, Inc. | Louisiana | 687 BBLs | 39,684 MCF | Mar 1998 - Dec 2024 |
| Missouri River Resources ND, LLC | North Dakota | 7,371 BBLs | 31,691 MCF | Nov 2014 - Jul 2025 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 4 BBLs | 712,781 MCF | Aug 1976 - Jun 2025 |
| Mogo Reagan, LLC | Montana | 3,515 BBLs | 11,468 MCF | Nov 2019 - Jul 2025 |
| Molitor Oil, Inc. | Kansas | 1,266 BBLs | 7,146 MCF | Jan 1980 - May 2025 |
| Moncrief W A Jr | Wyoming | 257 BBLs | 18,572 MCF | Jan 1978 - Jul 2025 |
| Montalban Oil & Gas Operations, Inc. | Montana | 2,938 BBLs | 70,723 MCF | Jan 1991 - Jul 2025 |
| Montgomery Production & Operating LLC | Kansas | 1,131 BBLs | 0 MCF | Jan 2020 - May 2025 |
| Morgenstern Oil Operations LLC | Kansas | 1,298 BBLs | 0 MCF | Feb 2020 - May 2025 |
| Morningstar Operating LLC | Montana | 302,242 BBLs | 475,090 MCF | Jan 2024 - Jul 2025 |
| Morningstar Operating LLC | New Mexico | 112,957 BBLs | 3,084,427 MCF | Sep 2020 - Jun 2025 |
| Morningstar Operating LLC | North Dakota | 31,076 BBLs | 41,874 MCF | Oct 2024 - Jul 2025 |
| Mosbacher Energy Company | Mississippi | 14,571 BBLs | 7,245 MCF | Dec 1976 - Jun 2025 |
| Mr NM Operating LLC | New Mexico | 9,740 BBLs | 59,572 MCF | Mar 2021 - Jul 2025 |
| MTM Petroleum, Inc. | Kansas | 1,028 BBLs | 22,741 MCF | Jan 1980 - May 2025 |
| Mull Drilling Company, Inc. | Kansas | 20,049 BBLs | 20,667 MCF | Jan 1980 - May 2025 |
| Mulloy Operating, Inc. | New Mexico | 6,690 BBLs | 6,647 MCF | Jul 2006 - Jun 2025 |
| Murex Petroleum Corporation | North Dakota | 260,239 BBLs | 575,749 MCF | Apr 2001 - Jul 2025 |
| Murfin Drilling Co., Inc. | Kansas | 75,982 BBLs | 1,128 MCF | Jan 1980 - May 2025 |
| Murfin Drilling Company, Inc. | North Dakota | 15,764 BBLs | 10,743 MCF | Mar 2025 - Jul 2025 |
| Murphrey Oil Company, Inc. | Louisiana | 3,563 BBLs | 0 MCF | Feb 2020 - Jan 2025 |
| Muskegon Operating Company LLC | Michigan | 25,855 BBLs | 347,106 MCF | Jan 2021 - Jun 2025 |
| Mustang Energy Corporation | Kansas | 6,464 BBLs | 0 MCF | Jan 1980 - May 2025 |
| Mustang Holding, LLC (Finnex) | Alaska | 13,902 BBLs | 30,098 MCF | Dec 2024 - Jul 2025 |
| Mustang Resources LLC | New Mexico | 198 BBLs | 105,258 MCF | Sep 2018 - Jun 2025 |
| Mustang Resources LLC | Wyoming | 471 BBLs | 199,255 MCF | Nov 2014 - Jun 2025 |
| Muzyl Oil Corp | Michigan | 87 BBLs | 152,274 MCF | Nov 2016 - Jul 2025 |
| MWK Petroleum, LLC | Kansas | 2,071 BBLs | 0 MCF | Jan 2020 - May 2025 |
| N-10 Exploration, LLC | Kansas | 1,092 BBLs | 49,004 MCF | Jan 2010 - May 2025 |
| Nadel And Gussman LLC | Kansas | 1,808 BBLs | 3,131 MCF | Jan 1980 - May 2025 |
| Nadel And Gussman Ruston, LLC | Louisiana | 7,961 BBLs | 1,173,013 MCF | Mar 2012 - Dec 2024 |
| Natural Gas Processing Company | Wyoming | 1,071 BBLs | 10,784 MCF | Feb 1978 - Jul 2025 |
| Navigation Powder River LLC | Wyoming | 16,905 BBLs | 68,471 MCF | Dec 2016 - Jul 2025 |
| Nec Operating - Kansas, LLC | Kansas | 3,263 BBLs | 4,927 MCF | Jan 2020 - May 2025 |
| Neptune Operating LLC | Montana | 1,103 BBLs | 3,409 MCF | Oct 2022 - Jul 2025 |
| Neptune Operating LLC | North Dakota | 740,550 BBLs | 1,930,436 MCF | Jan 2023 - Jul 2025 |
| New Age Oil LLC | Kansas | 1,965 BBLs | 70 MCF | Feb 1982 - May 2025 |
| New Era Petroleum Inc | Wyoming | 2,054 BBLs | 0 MCF | Feb 2010 - Jul 2025 |
| New Horizon Resources LLC | Kansas | 1,278 BBLs | 0 MCF | Jan 2020 - May 2025 |
| New Horizon Resources LLC | Montana | 7,935 BBLs | 433 MCF | Feb 2022 - Jul 2025 |
| New Horizon Resources LLC | Wyoming | 1,795 BBLs | 1,751 MCF | Jan 2022 - Jun 2025 |
| New Millennium Resources, Inc. | North Dakota | 1,475 BBLs | 93 MCF | Apr 2002 - Jul 2025 |