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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| M & M Exploration, Inc. | Kansas | 1,418 BBLs | 19,020 MCF | Mar 2002 - Mar 2025 |
| M & M Oil Company, L.L.C. | Louisiana | 2,996 BBLs | 0 MCF | Aug 1994 - Jan 2025 |
| M G Oil Inc | Kansas | 7,011 BBLs | 0 MCF | Jan 1980 - Mar 2025 |
| Mack Energy Corp | New Mexico | 150,944 BBLs | 382,022 MCF | Jan 1993 - May 2025 |
| Mad Operators LLC | Kansas | 1,756 BBLs | 470 MCF | Jan 2020 - Mar 2025 |
| Magna Operating, LLC | Louisiana | 4,137 BBLs | 0 MCF | Sep 2010 - Dec 2024 |
| Magpie Operating, Inc | Colorado | 22,965 BBLs | 126,449 MCF | Jan 1999 - Apr 2025 |
| Mai Oil Operations, Inc. | Kansas | 47,346 BBLs | 314 MCF | Jan 1980 - Mar 2025 |
| Manzanita Operating, LLC | New Mexico | 4,329 BBLs | 0 MCF | Apr 2022 - Apr 2025 |
| Manzano LLC | New Mexico | 6,336 BBLs | 11,702 MCF | Mar 2005 - May 2025 |
| Mar-Lou Oil Co., LLC | Kansas | 2,462 BBLs | 0 MCF | Jan 1980 - Mar 2025 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 222,331 MCF | Jan 1999 - Apr 2025 |
| Marathon Oil Company | North Dakota | 2,334,175 BBLs | 5,597,248 MCF | Jul 1979 - May 2025 |
| Marathon Oil Permian LLC | New Mexico | 1,001,251 BBLs | 3,323,942 MCF | Jul 2017 - May 2025 |
| Marlin Exploration, LLC | Louisiana | 2,976 BBLs | 2,082 MCF | Mar 2015 - Jan 2025 |
| Marlin Operating, LLC | New Mexico | 7,035 BBLs | 23,458 MCF | Jan 2022 - Apr 2025 |
| Marlin Resources, L.L.C. | Louisiana | 2,463 BBLs | 0 MCF | Apr 2008 - Jan 2025 |
| Marquee Corporation | Louisiana | 1,825 BBLs | 268 MCF | Jun 1990 - Dec 2024 |
| Marshall & Winston Inc | New Mexico | 34,794 BBLs | 102,316 MCF | Jan 1993 - Apr 2025 |
| Matador Production Company | New Mexico | 4,603,851 BBLs | 18,373,362 MCF | Mar 2006 - Apr 2025 |
| Matrix Production Company | Wyoming | 27,234 BBLs | 22,856 MCF | Jan 1994 - Apr 2025 |
| Maverick Permian LLC | New Mexico | 107,571 BBLs | 926,384 MCF | Jul 2022 - Apr 2025 |
| Maxim Drilling & Expl Inc | Wyoming | 1,381 BBLs | 13,608 MCF | Jun 1982 - May 2025 |
| Maximus Operating LTD | Wyoming | 9,766 BBLs | 433 MCF | Jul 2014 - May 2025 |
| Maximus Operating, LTD. | Louisiana | 526 BBLs | 36,971 MCF | Jan 2006 - Jan 2025 |
| McCormick Production Company, Inc. | Louisiana | 4,393 BBLs | 0 MCF | Jan 2009 - Dec 2024 |
| McCoy Petroleum Corporation | Kansas | 16,114 BBLs | 16,305 MCF | Jan 1980 - Mar 2025 |
| McFadden Oil Co. | Kansas | 2,839 BBLs | 0 MCF | Jan 1980 - Mar 2025 |
| McGinness Energy Company, Inc. | Kansas | 1,568 BBLs | 35,969 MCF | Jan 2020 - Mar 2025 |
| McGowan Working Partners Inc. | Mississippi | 1,708 BBLs | 2,989 MCF | Dec 1976 - Apr 2025 |
| McGowan Working Partners, Inc. | Arkansas | 5,936 BBLs | 3,081 MCF | Jan 2001 - Jan 2025 |
| McGowan Working Partners, Inc. | Louisiana | 22,202 BBLs | 40,083 MCF | Jan 2001 - Dec 2024 |
| MDS Energy Development LLC | Colorado | 15,133 BBLs | 79,361 MCF | Nov 2022 - May 2025 |
| MDS Energy Development LLC | Wyoming | 37,955 BBLs | 75,575 MCF | Jan 2025 - May 2025 |
| Me-Tex Oil & Gas Inc | New Mexico | 3,137 BBLs | 19,624 MCF | Jan 1993 - May 2025 |
| Medora Minerals, LLC | North Dakota | 7,684 BBLs | 10 MCF | Nov 2018 - May 2025 |
| Mega Energy LLC | Wyoming | 0 BBLs | 29,651 MCF | May 2013 - May 2025 |
| Mercury Resources LLC | North Dakota | 12,724 BBLs | 19,235 MCF | Dec 2018 - May 2025 |
| Meridian Energy Inc. | Kansas | 5,057 BBLs | 0 MCF | Jan 1980 - Mar 2025 |
| Merit Energy Company | Wyoming | 526,126 BBLs | 220,557 MCF | Jan 1981 - May 2025 |
| Merit Energy Company, LLC | Kansas | 143,477 BBLs | 1,427,799 MCF | Jan 1980 - Mar 2025 |
| Merrion Oil & Gas Corp | New Mexico | 832 BBLs | 102,291 MCF | Jan 1993 - May 2025 |
| Merrion Oil & Gas Corporation | Wyoming | 1,326 BBLs | 45,377 MCF | Jan 1978 - Apr 2025 |
| Messenger Petroleum, Inc. | Kansas | 1,873 BBLs | 35,079 MCF | Jan 1980 - Mar 2025 |
| Mewbourne Oil Co | New Mexico | 7,726,618 BBLs | 29,631,207 MCF | Jan 1993 - Apr 2025 |
| Michael D. Weilert Oil Company | Kansas | 1,252 BBLs | 0 MCF | Jan 1980 - Mar 2025 |
| Mid-Con Energy Operating LLC | Wyoming | 7,531 BBLs | 2,793 MCF | Feb 2017 - May 2025 |
| Mid-Continent Resources, Inc. | Kansas | 1,580 BBLs | 0 MCF | Jan 1980 - Mar 2025 |
| Mid-South Trading, Inc. | Louisiana | 2,454 BBLs | 0 MCF | Dec 1995 - Jan 2025 |
| Middle Fork Energy Uinta, LLC | Utah | 117,993 BBLs | 7,676,638 MCF | Sep 2018 - Apr 2025 |