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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Kansas Energy Company, L.L.C. | Kansas | 1,407 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Kansas Natural Gas Operating, LC | Kansas | 0 BBLs | 110,246 MCF | Jan 2010 - Jun 2025 |
| Kantor Oil Company, LLC | Kansas | 2,336 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Kelly Bayou Production | Louisiana | 2,038 BBLs | 0 MCF | Sep 1999 - Jan 2025 |
| Kennedy Oil | Wyoming | 2,829 BBLs | 17,879 MCF | Apr 1984 - Aug 2025 |
| Kentex Worland LLC | Wyoming | 2,232 BBLs | 123,740 MCF | Apr 2019 - Aug 2025 |
| Kerr McGee Oil & Gas Onshore LP | Colorado | 2,908,710 BBLs | 25,261,193 MCF | Jan 1999 - Jul 2025 |
| Kerr-McGee Oil & Gas Onshore LP | Wyoming | 3,182 BBLs | 10,929 MCF | Mar 1994 - Aug 2025 |
| Key Operating Company | Louisiana | 16,584 BBLs | 14,806 MCF | Jan 1995 - Jan 2025 |
| KGH Operating Company | Colorado | 514 BBLs | 34,838 MCF | Jun 2000 - Jul 2025 |
| Kinder Morgan Co2 Co LP | Colorado | 298 BBLs | 20,175,480 MCF | Apr 2000 - Aug 2025 |
| Kirby Oil Company | Louisiana | 4,097 BBLs | 0 MCF | Jan 1981 - Dec 2024 |
| Knighton Oil Company, Inc. | Kansas | 5,537 BBLs | 1,368 MCF | Jan 1980 - Jun 2025 |
| Koda Resources Operating, LLC | North Dakota | 257,238 BBLs | 316,588 MCF | Sep 2019 - Aug 2025 |
| Koehn, Radell W. And Austin Koehn & Morgan Koehn | Kansas | 1,395 BBLs | 0 MCF | Jan 2010 - Jun 2025 |
| Koron Investments, Inc. | Kansas | 1,660 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Kraft Oil Company LLC | Kansas | 1,354 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| Kraken Operating, LLC | Montana | 958,431 BBLs | 1,444,532 MCF | Sep 2013 - Jul 2025 |
| Kraken Operating, LLC | North Dakota | 960,448 BBLs | 2,258,083 MCF | Sep 2016 - Aug 2025 |
| Kratos Operating, LLC | New Mexico | 1,593 BBLs | 201 MCF | Jul 2023 - Jul 2025 |
| Krier, Kirby Oil, Inc. | Kansas | 2,591 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| L. D. Drilling, Inc. | Kansas | 4,720 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| La Delta Farms Oil Company LLC | Louisiana | 1,377 BBLs | 2,299 MCF | Mar 2016 - Dec 2024 |
| Lachenmayr Oil LLC | Kansas | 2,823 BBLs | 1,266 MCF | Jan 1980 - Jun 2025 |
| Lafayette Oilfield Contractors, Inc. | Louisiana | 8,311 BBLs | 0 MCF | Nov 2020 - Dec 2024 |
| Lambda Energy Resources LLC | Michigan | 39,782 BBLs | 431,439 MCF | May 2014 - Aug 2025 |
| Land And Natural Resource Development, Inc. | Alabama | 2,440 BBLs | 39,695 MCF | Jul 1977 - Jul 2025 |
| Landmark Energy Partners, LLC | New Mexico | 1,593 BBLs | 0 MCF | May 2024 - Jul 2025 |
| Landmark Resources, Inc. | Kansas | 13,601 BBLs | 4,659 MCF | Jan 1980 - Jun 2025 |
| Lario Oil & Gas Co | New Mexico | 14,330 BBLs | 9,385 MCF | Jan 1993 - Jul 2025 |
| Lario Oil & Gas Company | Kansas | 21,894 BBLs | 22,695 MCF | Jan 1980 - Jun 2025 |
| Lawco Holdings, LLC | Kansas | 1,713 BBLs | 0 MCF | Aug 2014 - Jun 2025 |
| Layline Oil And Gas LLC | Michigan | 8,018 BBLs | 4,927 MCF | Jan 2017 - Aug 2025 |
| Laymon Oil II, LLC | Kansas | 8,156 BBLs | 0 MCF | Jan 1980 - Jun 2025 |
| LB Exploration, Inc. | Kansas | 1,447 BBLs | 15,077 MCF | Jan 1980 - Jun 2025 |
| Lease Management Inc | Michigan | 5,768 BBLs | 0 MCF | Jan 1982 - Jul 2025 |
| Lebsack Oil Production Inc. | Kansas | 5,619 BBLs | 1,034 MCF | Jan 1980 - Jun 2025 |
| Legacy Reserves Operating LP | Montana | 1,527 BBLs | 18 MCF | Jun 2012 - Jul 2025 |
| Legacy Reserves Operating LP | North Dakota | 3,170 BBLs | 2,799 MCF | Oct 2006 - Aug 2025 |
| Lewis Operating Company | Louisiana | 1,466 BBLs | 120 MCF | Oct 1988 - Dec 2024 |
| LH Operating, LLC | New Mexico | 26,975 BBLs | 19,702 MCF | Nov 2019 - Aug 2025 |
| Liberty Operating Company, LLC | Mississippi | 2,006 BBLs | 0 MCF | Dec 1976 - Jul 2025 |
| Liberty Resources Management Company, LLC | North Dakota | 2,665 BBLs | 1,333 MCF | Jun 2014 - Aug 2025 |
| Lime Rock Resources III-A, L.P. | North Dakota | 247,305 BBLs | 340,484 MCF | Mar 2015 - Aug 2025 |
| Lime Rock Resources V-A, LP | North Dakota | 64,200 BBLs | 630,895 MCF | Jul 2022 - Aug 2025 |
| Little Chief Energy Corporation | Kansas | 1,257 BBLs | 0 MCF | Jan 2010 - Jun 2025 |
| Lobo Operating, Inc. | Louisiana | 2,430 BBLs | 1,308 MCF | Mar 1995 - Dec 2024 |
| Lobo Production, Inc | Kansas | 0 BBLs | 26,460 MCF | Jan 1980 - Jun 2025 |
| Locin Oil Corporation | Colorado | 462 BBLs | 52,883 MCF | Jun 2000 - Jul 2025 |
| Loeb LLC* Herman L | Colorado | 1,631 BBLs | 0 MCF | Jan 1999 - Aug 2025 |