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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Lonestar Oil Co | Kansas | 1,536 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Longfellow Energy, LP | New Mexico | 241,416 BBLs | 577,293 MCF | Jul 2017 - Jun 2025 |
| Longs Peak Resources LLC | Colorado | 2,579 BBLs | 1,567 MCF | Feb 2016 - Jul 2025 |
| Longs Peak Resources LLC | Wyoming | 11,928 BBLs | 15,619 MCF | Feb 2016 - Jun 2025 |
| Louisiana Jordan Oil Company, Inc. | Louisiana | 1,207 BBLs | 0 MCF | Jan 2013 - Dec 2024 |
| Luff Exploration Company | North Dakota | 10,001 BBLs | 6,976 MCF | Dec 1996 - Jul 2025 |
| Lynx Operating Co., Inc. | New Mexico | 2,600 BBLs | 2,321 MCF | Jan 1999 - Jul 2025 |
| M & G DRLG Co Inc | New Mexico | 0 BBLs | 56,742 MCF | May 1995 - Jun 2025 |
| M & K Oil Company LLC | Wyoming | 24,334 BBLs | 82,520 MCF | Jan 1978 - Jun 2025 |
| M & M Exploration, Inc. | Kansas | 948 BBLs | 20,573 MCF | Mar 2002 - Apr 2025 |
| M & M Oil Company, L.L.C. | Louisiana | 2,996 BBLs | 0 MCF | Aug 1994 - Jan 2025 |
| M G Oil Inc | Kansas | 6,391 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Mack Energy Corp | New Mexico | 125,360 BBLs | 358,920 MCF | Jan 1993 - Jun 2025 |
| Mad Operators LLC | Kansas | 2,523 BBLs | 518 MCF | Jan 2020 - Apr 2025 |
| Magna Operating, LLC | Louisiana | 4,137 BBLs | 0 MCF | Sep 2010 - Dec 2024 |
| Magpie Operating, Inc | Colorado | 21,556 BBLs | 113,462 MCF | Jan 1999 - Jun 2025 |
| Mai Oil Operations, Inc. | Kansas | 44,463 BBLs | 335 MCF | Jan 1980 - Apr 2025 |
| Manzanita Operating, LLC | New Mexico | 6,346 BBLs | 0 MCF | Apr 2022 - Jun 2025 |
| Manzano LLC | New Mexico | 3,361 BBLs | 8,422 MCF | Mar 2005 - Jun 2025 |
| Mar-Lou Oil Co., LLC | Kansas | 2,248 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Maralex Resources, Inc | Colorado | 0 BBLs | 65,919 MCF | Jan 1999 - Jun 2025 |
| Marathon Oil Company | North Dakota | 2,124,006 BBLs | 5,308,421 MCF | Jul 1979 - Jul 2025 |
| Marathon Oil Permian LLC | New Mexico | 1,186,645 BBLs | 3,770,873 MCF | Jul 2017 - Jun 2025 |
| Marlin Exploration, LLC | Louisiana | 2,976 BBLs | 2,082 MCF | Mar 2015 - Jan 2025 |
| Marlin Operating, LLC | New Mexico | 7,201 BBLs | 26,058 MCF | Jan 2022 - Jun 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 | 30,309 BBLs | 89,888 MCF | Jan 1993 - Jun 2025 |
| Matador Production Company | New Mexico | 4,538,476 BBLs | 18,514,740 MCF | Mar 2006 - Jun 2025 |
| Maverick Permian LLC | New Mexico | 128,649 BBLs | 1,123,540 MCF | Jul 2022 - Jun 2025 |
| Maxim Drilling & Expl Inc | Wyoming | 1,514 BBLs | 15,860 MCF | Jun 1982 - Jun 2025 |
| Maximus Operating LTD | Wyoming | 10,738 BBLs | 1,323 MCF | Jul 2014 - Jul 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 | 17,634 BBLs | 22,146 MCF | Jan 1980 - Apr 2025 |
| McFadden Oil Co. | Kansas | 4,176 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| McGinness Energy Company, Inc. | Kansas | 1,732 BBLs | 53,916 MCF | Jan 2020 - Apr 2025 |
| McGowan Working Partners Inc. | Mississippi | 1,905 BBLs | 3,167 MCF | Dec 1976 - May 2025 |
| McGowan Working Partners, Inc. | Louisiana | 22,202 BBLs | 40,083 MCF | Jan 2001 - Dec 2024 |
| MDS Energy Development LLC | Colorado | 13,153 BBLs | 74,106 MCF | Nov 2022 - Jun 2025 |
| MDS Energy Development LLC | Wyoming | 26,996 BBLs | 61,691 MCF | Jan 2025 - Jun 2025 |
| Me-Tex Oil & Gas Inc | New Mexico | 3,600 BBLs | 21,539 MCF | Jan 1993 - Jul 2025 |
| Medora Minerals, LLC | North Dakota | 7,244 BBLs | 74 MCF | Nov 2018 - Jul 2025 |
| Mercury Resources LLC | North Dakota | 9,356 BBLs | 0 MCF | Dec 2018 - Jun 2025 |
| Meridian Energy Inc. | Kansas | 5,879 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Merit Energy Company | Wyoming | 400,672 BBLs | 208,722 MCF | Jan 1981 - Jun 2025 |
| Merit Energy Company, LLC | Kansas | 172,067 BBLs | 1,828,316 MCF | Jan 1980 - Apr 2025 |
| Merrion Oil & Gas Corp | New Mexico | 999 BBLs | 100,217 MCF | Jan 1993 - Jul 2025 |
| Merrion Oil & Gas Corporation | Wyoming | 1,342 BBLs | 46,923 MCF | Jan 1978 - Jun 2025 |
| Messenger Petroleum, Inc. | Kansas | 2,501 BBLs | 40,143 MCF | Jan 1980 - Apr 2025 |