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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Kaiser-Francis Oil Co | New Mexico | 1,210,854 BBLs | 4,542,745 MCF | Jan 1993 - Jun 2025 |
| Kansas Energy Company, L.L.C. | Kansas | 1,978 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Kansas Natural Gas Operating, LC | Kansas | 0 BBLs | 112,064 MCF | Jan 2010 - Apr 2025 |
| Kantor Oil Company, LLC | Kansas | 3,035 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| Kelly Bayou Production | Louisiana | 2,038 BBLs | 0 MCF | Sep 1999 - Jan 2025 |
| Kennedy Oil | Wyoming | 2,755 BBLs | 14,375 MCF | Apr 1984 - Jun 2025 |
| Kentex Worland LLC | Wyoming | 2,238 BBLs | 105,790 MCF | Apr 2019 - Jul 2025 |
| Kerr McGee Oil & Gas Onshore LP | Colorado | 2,512,427 BBLs | 23,567,855 MCF | Jan 1999 - Jun 2025 |
| Kerr-McGee Oil & Gas Onshore LP | Wyoming | 2,300 BBLs | 8,312 MCF | Mar 1994 - Jun 2025 |
| Key Operating Company | Louisiana | 16,584 BBLs | 14,806 MCF | Jan 1995 - Jan 2025 |
| KFG Petroleum Corporation | Mississippi | 1,297 BBLs | 0 MCF | Dec 1976 - May 2025 |
| KGH Operating Company | Colorado | 646 BBLs | 38,693 MCF | Jun 2000 - Jun 2025 |
| Kinder Morgan Co2 Co LP | Colorado | 266 BBLs | 20,394,891 MCF | Apr 2000 - Jul 2025 |
| Kirby Oil Company | Louisiana | 4,097 BBLs | 0 MCF | Jan 1981 - Dec 2024 |
| Knighton Oil Company, Inc. | Kansas | 6,696 BBLs | 1,355 MCF | Jan 1980 - Apr 2025 |
| Koda Resources Operating, LLC | North Dakota | 304,482 BBLs | 298,209 MCF | Sep 2019 - Jun 2025 |
| Koehn, Radell W. And Austin Koehn & Morgan Koehn | Kansas | 1,569 BBLs | 0 MCF | Jan 2010 - Apr 2025 |
| Kraken Operating, LLC | Montana | 1,035,224 BBLs | 1,418,272 MCF | Sep 2013 - Jun 2025 |
| Kraken Operating, LLC | North Dakota | 996,638 BBLs | 2,147,616 MCF | Sep 2016 - Jun 2025 |
| Krier, Kirby Oil, Inc. | Kansas | 1,736 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| L. D. Drilling, Inc. | Kansas | 13,573 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| La Delta Farms Oil Company LLC | Louisiana | 1,377 BBLs | 2,299 MCF | Mar 2016 - Dec 2024 |
| Lachenmayr Oil LLC | Kansas | 3,607 BBLs | 861 MCF | Jan 1980 - Apr 2025 |
| Lafayette Oilfield Contractors, Inc. | Louisiana | 8,311 BBLs | 0 MCF | Nov 2020 - Dec 2024 |
| Lambda Energy Resources LLC | Michigan | 36,285 BBLs | 397,094 MCF | May 2014 - Jul 2025 |
| Land And Natural Resource Development, Inc. | Alabama | 2,790 BBLs | 40,907 MCF | Jul 1977 - Apr 2025 |
| Landmark Energy Partners, LLC | New Mexico | 1,292 BBLs | 0 MCF | May 2024 - Jul 2025 |
| Landmark Resources, Inc. | Kansas | 12,901 BBLs | 5,117 MCF | Jan 1980 - Apr 2025 |
| Lario Oil & Gas Co | New Mexico | 20,757 BBLs | 13,431 MCF | Jan 1993 - Jun 2025 |
| Lario Oil & Gas Company | Kansas | 21,513 BBLs | 23,251 MCF | Jan 1980 - Apr 2025 |
| Layline Oil And Gas LLC | Michigan | 9,033 BBLs | 3,157 MCF | Jan 2017 - Jun 2025 |
| Laymon Oil II, LLC | Kansas | 8,401 BBLs | 0 MCF | Jan 1980 - Apr 2025 |
| LB Exploration, Inc. | Kansas | 1,311 BBLs | 15,289 MCF | Jan 1980 - Apr 2025 |
| Lebsack Oil Production Inc. | Kansas | 5,233 BBLs | 1,079 MCF | Jan 1980 - Apr 2025 |
| Legacy Reserves Operating LP | Montana | 1,535 BBLs | 18 MCF | Jun 2012 - Jun 2025 |
| Legacy Reserves Operating LP | North Dakota | 5,435 BBLs | 4,999 MCF | Oct 2006 - Jul 2025 |
| Lewis Operating Company | Louisiana | 1,466 BBLs | 120 MCF | Oct 1988 - Dec 2024 |
| LH Operating, LLC | New Mexico | 25,344 BBLs | 20,573 MCF | Nov 2019 - Jun 2025 |
| Liberty Resources Management Company, LLC | North Dakota | 1,937 BBLs | 967 MCF | Jun 2014 - Jun 2025 |
| Lime Rock Resources III-A, L.P. | North Dakota | 252,086 BBLs | 341,804 MCF | Mar 2015 - Jul 2025 |
| Lime Rock Resources V-A, LP | North Dakota | 66,356 BBLs | 595,487 MCF | Jul 2022 - Jul 2025 |
| Little Chief Energy Corporation | Kansas | 1,658 BBLs | 0 MCF | Jan 2010 - Apr 2025 |
| Lobo Operating, Inc. | Louisiana | 2,430 BBLs | 1,308 MCF | Mar 1995 - Dec 2024 |
| Lobo Production, Inc | Kansas | 0 BBLs | 30,868 MCF | Jan 1980 - Apr 2025 |
| Locin Oil Corporation | Colorado | 385 BBLs | 65,159 MCF | Jun 2000 - Jun 2025 |
| Loeb LLC* Herman L | Colorado | 1,228 BBLs | 0 MCF | Jan 1999 - Jul 2025 |
| Logos Operating LLC | Colorado | 2 BBLs | 257,086 MCF | Jul 2017 - Jun 2025 |
| Logos Operating, LLC | New Mexico | 18,610 BBLs | 6,257,920 MCF | Jul 2012 - Jun 2025 |
| Loil Oil LLC | Wyoming | 4,047 BBLs | 9,771 MCF | Nov 2016 - Jun 2025 |
| Lone Wolf Oil & Gas Co., LLC | Kansas | 1,399 BBLs | 0 MCF | Jan 2010 - Apr 2025 |