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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| M G Oil Inc | Kansas | 7,052 BBLs | 0 MCF | Jan 1980 - Jan 2025 |
| Mack Energy Corp | New Mexico | 144,928 BBLs | 323,600 MCF | Jan 1993 - Feb 2025 |
| Mad Operators LLC | Kansas | 1,733 BBLs | 528 MCF | Jan 2020 - Jan 2025 |
| Magna Operating, LLC | Louisiana | 4,137 BBLs | 0 MCF | Sep 2010 - Dec 2024 |
| Magpie Operating, Inc | Colorado | 22,160 BBLs | 101,892 MCF | Jan 1999 - Feb 2025 |
| Mai Oil Operations, Inc. | Kansas | 49,280 BBLs | 355 MCF | Jan 1980 - Jan 2025 |
| Manzanita Operating, LLC | New Mexico | 4,170 BBLs | 0 MCF | Apr 2022 - Feb 2025 |
| Manzano LLC | New Mexico | 6,692 BBLs | 13,369 MCF | Mar 2005 - Feb 2025 |
| Mar-Lou Oil Co., LLC | Kansas | 1,824 BBLs | 0 MCF | Jan 1980 - Jan 2025 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 154,782 MCF | Jan 1999 - Feb 2025 |
| Marathon Oil Company | North Dakota | 2,911,800 BBLs | 6,216,583 MCF | Jul 1979 - Mar 2025 |
| Marathon Oil Permian LLC | New Mexico | 958,968 BBLs | 3,243,177 MCF | Jul 2017 - Mar 2025 |
| Marlin Exploration, LLC | Louisiana | 2,976 BBLs | 2,082 MCF | Mar 2015 - Jan 2025 |
| Marlin Operating, LLC | New Mexico | 7,187 BBLs | 21,866 MCF | Jan 2022 - Feb 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 | 34,475 BBLs | 92,072 MCF | Jan 1993 - Feb 2025 |
| Matador Production Company | New Mexico | 3,698,608 BBLs | 15,218,209 MCF | Mar 2006 - Feb 2025 |
| Matrix Production Company | Wyoming | 24,633 BBLs | 21,703 MCF | Jan 1994 - Feb 2025 |
| Maverick Permian LLC | New Mexico | 112,565 BBLs | 1,009,668 MCF | Jul 2022 - Feb 2025 |
| Maxim Drilling & Expl Inc | Wyoming | 1,290 BBLs | 16,209 MCF | Jun 1982 - Mar 2025 |
| Maximus Operating LTD | Wyoming | 8,779 BBLs | 451 MCF | Jul 2014 - Mar 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 | 17,207 BBLs | 23,227 MCF | Jan 1980 - Jan 2025 |
| McFadden Oil Co. | Kansas | 3,006 BBLs | 0 MCF | Jan 1980 - Jan 2025 |
| McGinness Energy Company, Inc. | Kansas | 1,291 BBLs | 44,201 MCF | Jan 2020 - Jan 2025 |
| McGowan Working Partners Inc. | Mississippi | 1,646 BBLs | 2,800 MCF | Dec 1976 - Mar 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 | 24,824 BBLs | 59,203 MCF | Nov 2022 - Feb 2025 |
| MDS Energy Development LLC | Wyoming | 80,250 BBLs | 103,207 MCF | Jan 2025 - Mar 2025 |
| Me-Tex Oil & Gas Inc | New Mexico | 2,939 BBLs | 17,578 MCF | Jan 1993 - Mar 2025 |
| Medora Minerals, LLC | North Dakota | 8,987 BBLs | 12 MCF | Nov 2018 - Mar 2025 |
| Mega Energy LLC | Wyoming | 0 BBLs | 28,981 MCF | May 2013 - Mar 2025 |
| Mercury Resources LLC | North Dakota | 12,970 BBLs | 15,637 MCF | Dec 2018 - Mar 2025 |
| Meridian Energy Inc. | Kansas | 4,853 BBLs | 0 MCF | Jan 1980 - Jan 2025 |
| Merit Energy Company | Wyoming | 378,808 BBLs | 200,741 MCF | Jan 1981 - Mar 2025 |
| Merit Energy Company, LLC | Kansas | 167,676 BBLs | 1,821,072 MCF | Jan 1980 - Jan 2025 |
| Merrion Oil & Gas Corp | Colorado | 264 BBLs | 17,841 MCF | Jan 1999 - Feb 2025 |
| Merrion Oil & Gas Corp | New Mexico | 1,142 BBLs | 101,315 MCF | Jan 1993 - Mar 2025 |
| Merrion Oil & Gas Corporation | Wyoming | 1,127 BBLs | 51,164 MCF | Jan 1978 - Mar 2025 |
| Messenger Petroleum, Inc. | Kansas | 1,792 BBLs | 35,516 MCF | Jan 1980 - Jan 2025 |
| Mewbourne Oil Co | New Mexico | 7,037,199 BBLs | 27,942,363 MCF | Jan 1993 - Feb 2025 |
| Michael D. Weilert Oil Company | Kansas | 1,289 BBLs | 0 MCF | Jan 1980 - Jan 2025 |
| Mid-Con Energy Operating LLC | Wyoming | 7,245 BBLs | 2,271 MCF | Feb 2017 - Mar 2025 |
| Mid-Continent Resources, Inc. | Kansas | 1,975 BBLs | 0 MCF | Jan 1980 - Jan 2025 |
| Mid-South Trading, Inc. | Louisiana | 2,454 BBLs | 0 MCF | Dec 1995 - Jan 2025 |
| Middle Fork Energy Uinta, LLC | Utah | 98,446 BBLs | 6,608,368 MCF | Sep 2018 - Feb 2025 |
| Midway Energy, LLC | Montana | 1,394 BBLs | 0 MCF | Mar 2019 - Feb 2025 |