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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Kaiser-Francis Oil Co | New Mexico | 242,221 BBLs | 542,957 MCF | Jan 1993 - Jan 2019 |
| Kaiser-Francis Oil Company | Louisiana | 10,791 BBLs | 96,775 MCF | Aug 1981 - Sep 2018 |
| Kaiser-Francis Oil Company | North Dakota | 30,624 BBLs | 32,752 MCF | Jul 2002 - Jul 2019 |
| Kansas Natural Gas Operating, LC | Kansas | 0 BBLs | 157,770 MCF | Jan 2010 - May 2019 |
| Kansas Resource Exploration & Development, LLC | Kansas | 2,553 BBLs | 0 MCF | Jan 1980 - May 2019 |
| Kantor Oil Company, LLC | Kansas | 3,180 BBLs | 0 MCF | Jan 1980 - May 2019 |
| Kash Oil And Gas, Inc | Louisiana | 2,807 BBLs | 10,041 MCF | Apr 1986 - Oct 2018 |
| Kelly Bayou Production | Louisiana | 2,421 BBLs | 0 MCF | Sep 1999 - Oct 2018 |
| Kentex Worland LLC | Wyoming | 2,611 BBLs | 87,821 MCF | Jan 2018 - Dec 2019 |
| Kerr McGee Oil & Gas Onshore LP | Colorado | 3,526,887 BBLs | 22,932,186 MCF | Jan 1999 - Jul 2019 |
| Kerr-McGee Oil & Gas Onshore LP | Wyoming | 7,401 BBLs | 40,709 MCF | Jan 1979 - Dec 2019 |
| Kerr-McGee Oil & Gas Onshore, LP | Utah | 35,242 BBLs | 7,814,491 MCF | Jan 2006 - Jul 2019 |
| Key Operating Company | Louisiana | 2,776 BBLs | 4,047 MCF | Jan 1995 - Sep 2018 |
| KFG Petroleum Corporation | Mississippi | 4,167 BBLs | 0 MCF | Dec 1976 - Jul 2019 |
| Kirby Oil Company | Louisiana | 4,102 BBLs | 0 MCF | Jan 1981 - Oct 2018 |
| Knighton Oil Company, Inc. | Kansas | 8,401 BBLs | 1,224 MCF | Jan 1980 - May 2019 |
| Koron Investments, Inc. | Kansas | 2,322 BBLs | 0 MCF | Jan 1980 - May 2019 |
| Kraken Development III, LLC | North Dakota | 43,646 BBLs | 61,339 MCF | Oct 2018 - Jul 2019 |
| Kraken Operating, LLC | Montana | 244,996 BBLs | 261,480 MCF | Sep 2013 - May 2019 |
| Kraken Operating, LLC | North Dakota | 909,568 BBLs | 1,488,264 MCF | Sep 2016 - Jul 2019 |
| L. D. Drilling, Inc. | Kansas | 22,156 BBLs | 0 MCF | Jan 1980 - May 2019 |
| La Veta Oil & Gas, LLC | Kansas | 2,401 BBLs | 0 MCF | Jan 1980 - May 2019 |
| Lachenmayr Oil LLC | Kansas | 3,058 BBLs | 0 MCF | Jan 1980 - May 2019 |
| Land And Natural Resource Development, Inc. | Alabama | 7,618 BBLs | 137,392 MCF | Jul 1977 - Jun 2019 |
| Landmark Resources, Inc. | Kansas | 11,847 BBLs | 5,843 MCF | Jan 1980 - May 2019 |
| Lario Oil & Gas Company | Kansas | 34,252 BBLs | 49,418 MCF | Jan 1980 - May 2019 |
| Larson Operating Company | Kansas | 15,241 BBLs | 0 MCF | Jan 1980 - May 2019 |
| Lavaca River Operating Company, LLC | Louisiana | 11,785 BBLs | 6,312 MCF | Aug 2014 - Aug 2018 |
| Lawco Holdings, LLC | Kansas | 4,718 BBLs | 0 MCF | Aug 2014 - May 2019 |
| Laymon Oil II, LLC | Kansas | 11,271 BBLs | 0 MCF | Jan 1980 - May 2019 |
| LB Exploration, Inc. | Kansas | 1,920 BBLs | 22,346 MCF | Jan 1980 - May 2019 |
| Lease Management Inc | Michigan | 5,030 BBLs | 0 MCF | Jan 1982 - Apr 2018 |
| Lebsack Oil Production Inc. | Kansas | 7,134 BBLs | 2,614 MCF | Jan 1980 - May 2019 |
| Legacy Reserves Operating LP | Montana | 17,317 BBLs | 9,064 MCF | Jun 2012 - Jul 2019 |
| Legacy Reserves Operating LP | North Dakota | 13,684 BBLs | 10,363 MCF | Oct 2006 - Jul 2019 |
| Legacy Reserves Operating LP | Wyoming | 30,678 BBLs | 453 MCF | Jan 1978 - Dec 2019 |
| Legacy Reserves Operating, LP | New Mexico | 337,057 BBLs | 881,540 MCF | May 2006 - Jan 2019 |
| Legacy Resources Co., L.P. | Louisiana | 756 BBLs | 57,844 MCF | Dec 1993 - Sep 2018 |
| Liberty Pioneer Energy Source, Inc | Utah | 0 BBLs | 57,858 MCF | Mar 2012 - Jul 2019 |
| Liberty Resources Management Company, LLC | North Dakota | 219,233 BBLs | 435,961 MCF | Jun 2014 - Aug 2019 |
| Lime Rock Resources II-A, L.P. | New Mexico | 90,662 BBLs | 387,353 MCF | Dec 2010 - Jan 2019 |
| Lime Rock Resources III-A, L.P. | Arkansas | 0 BBLs | 747,039 MCF | Jan 2001 - Jun 2019 |
| Lime Rock Resources III-A, L.P. | North Dakota | 480,816 BBLs | 449,592 MCF | Mar 2015 - Jul 2019 |
| Linn Operating LLC | Michigan | 1,411 BBLs | 1,235,668 MCF | Jan 1982 - Apr 2018 |
| Linn Operating, Inc. | Louisiana | 5,529 BBLs | 255,566 MCF | Feb 2008 - Sep 2018 |
| Lobo Operating, Inc. | Louisiana | 26,364 BBLs | 33,848 MCF | Mar 1995 - Aug 2018 |
| Loeb LLC* Herman L | Colorado | 3,001 BBLs | 14,772 MCF | Jan 1999 - Aug 2019 |
| Logos Operating, LLC | New Mexico | 83,875 BBLs | 2,960,634 MCF | Jul 2012 - Jan 2019 |
| Lone MTN Production Co | Utah | 30 BBLs | 71,517 MCF | Jan 1981 - Jul 2019 |
| Lotus Operating Company, L.L.C. | Kansas | 6,706 BBLs | 78,327 MCF | Jan 1980 - May 2019 |