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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Longfellow Energy, LP | New Mexico | 137,053 BBLs | 572,299 MCF | Jul 2017 - Aug 2026 |
| Longs Peak Resources LLC | Wyoming | 15,428 BBLs | 18,216 MCF | Feb 2016 - Aug 2026 |
| Louisiana Jordan Oil Company, Inc. | Louisiana | 1,207 BBLs | 0 MCF | Jan 2013 - Dec 2024 |
| Louisiana Offshore Exploration, L.L.C. | Louisiana | 898 BBLs | 0 MCF | Jan 2021 - Dec 2024 |
| Luff Exploration Company | North Dakota | 8,801 BBLs | 6,721 MCF | Dec 1996 - Jul 2026 |
| Lynx Operating Co., Inc. | New Mexico | 2,692 BBLs | 2,377 MCF | Jan 1999 - Sep 2026 |
| M & D Oil And Gas, LLC | Kansas | 950 BBLs | 0 MCF | Jan 2020 - Jun 2026 |
| M & G DRLG Co Inc | New Mexico | 69 BBLs | 64,789 MCF | May 1995 - Aug 2026 |
| M & K Oil Company LLC | Wyoming | 27,055 BBLs | 65,789 MCF | Jan 1978 - Aug 2026 |
| M & M Exploration, Inc. | Kansas | 1,235 BBLs | 17,418 MCF | Mar 2002 - Jun 2026 |
| M & M Oil Company, L.L.C. | Louisiana | 2,996 BBLs | 0 MCF | Aug 1994 - Jan 2025 |
| M G Oil Inc | Kansas | 7,774 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Mack Energy Corp | New Mexico | 138,428 BBLs | 372,134 MCF | Jan 1993 - Aug 2026 |
| Mad Operators LLC | Kansas | 12,987 BBLs | 509 MCF | Jan 2020 - Jun 2026 |
| Magna Operating, LLC | Louisiana | 4,137 BBLs | 0 MCF | Sep 2010 - Dec 2024 |
| Magpie Operating, Inc | Colorado | 14,197 BBLs | 122,371 MCF | Jan 1999 - Jul 2026 |
| Mai Oil Operations, Inc. | Kansas | 46,119 BBLs | 7,629 MCF | Jan 1980 - Jun 2026 |
| Manning, Gregory | Kansas | 1,465 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Manzanita Operating, LLC | New Mexico | 6,593 BBLs | 0 MCF | Apr 2022 - Aug 2026 |
| Mar-Lou Oil Co., LLC | Kansas | 1,110 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 43,890 MCF | Jan 1999 - Aug 2026 |
| Marathon Oil Company | North Dakota | 1,670,729 BBLs | 4,380,206 MCF | Jul 1979 - Jul 2026 |
| Marathon Oil Permian LLC | New Mexico | 706,693 BBLs | 3,076,783 MCF | Jul 2017 - Aug 2026 |
| Marlin Exploration, LLC | Louisiana | 2,976 BBLs | 2,082 MCF | Mar 2015 - Jan 2025 |
| Marlin Operating, LLC | New Mexico | 22,901 BBLs | 32,549 MCF | Jan 2022 - Aug 2026 |
| Marlin Resources, L.L.C. | Louisiana | 2,463 BBLs | 0 MCF | Apr 2008 - Jan 2025 |
| Marlo Operating Company, LLC | North Dakota | 947 BBLs | 55 MCF | Mar 2026 - Jul 2026 |
| Marquee Corporation | Louisiana | 1,825 BBLs | 268 MCF | Jun 1990 - Dec 2024 |
| Marshall & Winston Inc | New Mexico | 35,415 BBLs | 105,909 MCF | Jan 1993 - Aug 2026 |
| Matador Production Company | New Mexico | 4,840,845 BBLs | 21,024,664 MCF | Mar 2006 - Aug 2026 |
| Maxim Drilling & Expl Inc | Wyoming | 1,437 BBLs | 18,419 MCF | Jun 1982 - Aug 2026 |
| Maximus Operating LTD | Wyoming | 10,351 BBLs | 314 MCF | Jul 2014 - Aug 2026 |
| 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 | 24,913 BBLs | 36,878 MCF | Jan 1980 - Jun 2026 |
| McFadden Oil Co. | Kansas | 3,353 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| McGinness Energy Company, Inc. | Kansas | 1,559 BBLs | 39,662 MCF | Jan 2020 - Jun 2026 |
| McGowan Working Partners, Inc. | Louisiana | 22,202 BBLs | 40,083 MCF | Jan 2001 - Dec 2024 |
| McNeill Well Service LLC | Wyoming | 1,272 BBLs | 1,204 MCF | Jan 2026 - Aug 2026 |
| MCR, LLC | Montana | 7,072 BBLs | 52,138 MCF | Oct 2003 - Jul 2026 |
| MDS Energy Development LLC | Colorado | 8,138 BBLs | 13,974 MCF | Nov 2022 - Jul 2026 |
| MDS Energy Development LLC | Wyoming | 20,201 BBLs | 39,445 MCF | Jan 2025 - Aug 2026 |
| Me-Tex Oil & Gas Inc | New Mexico | 3,397 BBLs | 21,526 MCF | Jan 1993 - Aug 2026 |
| Medora Minerals, LLC | North Dakota | 6,384 BBLs | 76 MCF | Nov 2018 - Jul 2026 |
| Mercury Resources LLC | North Dakota | 11,235 BBLs | 27,305 MCF | Dec 2018 - Jul 2026 |
| Meridian Energy Inc. | Kansas | 3,571 BBLs | 0 MCF | Jan 1980 - Jun 2026 |
| Merit Energy Company | Wyoming | 395,769 BBLs | 227,493 MCF | Jan 1981 - Aug 2026 |
| Merit Energy Company, LLC | Kansas | 129,379 BBLs | 899,143 MCF | Jan 1980 - Jun 2026 |
| Merrion Oil & Gas Corp | New Mexico | 777 BBLs | 87,522 MCF | Jan 1993 - Aug 2026 |
| Merrion Oil & Gas Corporation | Wyoming | 1,443 BBLs | 9,117 MCF | Jan 1978 - Aug 2026 |