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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Magnolia Production Company LLC | Louisiana | 859 BBLs | 33,054 MCF | Mar 2015 - Dec 2023 |
| Magnum Producing, L.P. | Louisiana | 2,430 BBLs | 0 MCF | Jan 2004 - Dec 2023 |
| Magpie Operating, Inc | Colorado | 6,876 BBLs | 48,817 MCF | Jan 1999 - Apr 2024 |
| Mai Oil Operations, Inc. | Kansas | 42,498 BBLs | 323 MCF | Jan 1980 - Mar 2024 |
| Manzano LLC | New Mexico | 14,315 BBLs | 26,084 MCF | Mar 2005 - Apr 2024 |
| Mar-Lou Oil Co., LLC | Kansas | 2,312 BBLs | 0 MCF | Jan 1980 - Mar 2024 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 236,329 MCF | Jan 1999 - Apr 2024 |
| Marathon Oil Company | North Dakota | 2,872,160 BBLs | 5,940,329 MCF | Jul 1979 - May 2024 |
| Marathon Oil Permian LLC | New Mexico | 979,155 BBLs | 3,147,786 MCF | Jul 2017 - May 2024 |
| Marlin Exploration, LLC | Louisiana | 2,866 BBLs | 2,043 MCF | Mar 2015 - Jan 2024 |
| Marlin Operating, LLC | New Mexico | 12,035 BBLs | 27,967 MCF | Jan 2022 - Apr 2024 |
| Marlin Resources, L.L.C. | Louisiana | 2,996 BBLs | 0 MCF | Apr 2008 - Jan 2024 |
| Marquee Corporation | Louisiana | 2,148 BBLs | 381 MCF | Jun 1990 - Jan 2024 |
| Marshall & Winston Inc | New Mexico | 61,666 BBLs | 112,243 MCF | Jan 1993 - May 2024 |
| Matador Production Company | New Mexico | 3,044,979 BBLs | 11,496,650 MCF | Mar 2006 - Apr 2024 |
| Maverick Permian LLC | New Mexico | 139,637 BBLs | 1,158,788 MCF | Jul 2022 - Apr 2024 |
| Maxim Drilling & Expl Inc | Wyoming | 1,230 BBLs | 10,221 MCF | Jun 1982 - May 2024 |
| Maximus Operating LTD | Wyoming | 10,134 BBLs | 3,448 MCF | Jul 2014 - May 2024 |
| Maximus Operating, LTD. | Louisiana | 289 BBLs | 61,261 MCF | Jan 2006 - Jan 2024 |
| McCormick Production Company, Inc. | Louisiana | 4,544 BBLs | 0 MCF | Jan 2009 - Dec 2023 |
| McCoy Petroleum Corporation | Kansas | 15,904 BBLs | 21,004 MCF | Jan 1980 - Mar 2024 |
| McFadden Oil Co. | Kansas | 3,629 BBLs | 0 MCF | Jan 1980 - Mar 2024 |
| McGowan Working Partners Inc. | Mississippi | 1,701 BBLs | 2,949 MCF | Dec 1976 - Apr 2024 |
| McGowan Working Partners, Inc. | Arkansas | 6,492 BBLs | 2,915 MCF | Jan 2001 - May 2024 |
| McGowan Working Partners, Inc. | Louisiana | 23,429 BBLs | 40,045 MCF | Jan 2001 - Dec 2023 |
| MDS Energy Development LLC | Colorado | 25,119 BBLs | 36,320 MCF | Nov 2022 - May 2024 |
| Me-Tex Oil & Gas Inc | New Mexico | 3,360 BBLs | 23,728 MCF | Jan 1993 - May 2024 |
| Medora Minerals, LLC | North Dakota | 5,166 BBLs | 78 MCF | Nov 2018 - May 2024 |
| Mercury Resources LLC | North Dakota | 6,154 BBLs | 12,878 MCF | Dec 2018 - May 2024 |
| Meridian Energy Inc. | Kansas | 4,804 BBLs | 0 MCF | Jan 1980 - Mar 2024 |
| Merit Energy Company | Wyoming | 421,282 BBLs | 220,584 MCF | Jan 1981 - May 2024 |
| Merit Energy Company, LLC | Arkansas | 0 BBLs | 5,648,634 MCF | Aug 2003 - Apr 2024 |
| Merit Energy Company, LLC | Kansas | 139,531 BBLs | 1,767,752 MCF | Jan 1980 - Mar 2024 |
| Merrion Oil & Gas Corp | New Mexico | 1,189 BBLs | 106,964 MCF | Jan 1993 - May 2024 |
| Merrion Oil & Gas Corporation | Wyoming | 1,300 BBLs | 48,116 MCF | Jan 1978 - May 2024 |
| Messenger Petroleum, Inc. | Kansas | 2,613 BBLs | 34,241 MCF | Jan 1980 - Mar 2024 |
| Mewbourne Oil Co | New Mexico | 6,630,456 BBLs | 23,710,663 MCF | Jan 1993 - Apr 2024 |
| Mid-Con Energy Operating LLC | Wyoming | 7,001 BBLs | 2,363 MCF | Feb 2017 - May 2024 |
| Mid-Continent Resources, Inc. | Kansas | 1,608 BBLs | 0 MCF | Jan 1980 - Mar 2024 |
| Mid-South Trading, Inc. | Louisiana | 2,200 BBLs | 0 MCF | Dec 1995 - Jan 2024 |
| Middle Fork Energy Uinta, LLC | Utah | 104,347 BBLs | 7,019,019 MCF | Sep 2018 - Apr 2024 |
| Mike Kelso Oil, Inc. | Kansas | 13,076 BBLs | 78,157 MCF | Jan 1980 - Mar 2024 |
| Mikol Oil LLC | Kansas | 1,811 BBLs | 0 MCF | Feb 2009 - Mar 2024 |
| Miller Energy Company II LLC | Michigan | 19,328 BBLs | 0 MCF | Jan 1982 - Mar 2024 |
| Mineral Ventures, Inc. | Louisiana | 1,152 BBLs | 36,080 MCF | Mar 1998 - Dec 2023 |
| Missaukee Oil And Gas Company LLC | Michigan | 6,066 BBLs | 1,611 MCF | Sep 2019 - Mar 2024 |
| Mission Creek Opco, LLC | Arkansas | 43,001 BBLs | 148,570 MCF | Oct 2018 - May 2024 |
| Missouri River Resources ND, LLC | North Dakota | 8,953 BBLs | 33,968 MCF | Nov 2014 - May 2024 |
| MMGK Arkoma, LLC | Arkansas | 0 BBLs | 932,091 MCF | Feb 2022 - Apr 2024 |
| Mobil Oil Exploration & Producing Southeast, Inc. | Alabama | 325 BBLs | 737,393 MCF | Aug 1976 - Feb 2024 |