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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Ivanhoe Energy USA Inc | Wyoming | 0 BBLs | 0 MCF | Feb 2004 - Nov 2006 |
| K & W Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - May 2007 |
| K B Company | Wyoming | 0 BBLs | 0 MCF | Aug 1992 - Apr 1994 |
| K N Energy Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Oct 1993 |
| Kachina Exploration Inc | Wyoming | 0 BBLs | 0 MCF | Aug 1992 - Jul 2000 |
| Kaiser Energy Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1985 - Dec 1987 |
| Kaiser Francis Oil Co | Wyoming | 1,230 BBLs | 52,911 MCF | Jan 1983 - Jan 2026 |
| Kamco Limited | Wyoming | 0 BBLs | 0 MCF | Nov 1992 - Sep 2016 |
| Kaneb Oil & Gas | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Oct 1987 |
| Kanowa Petroleum | Wyoming | 0 BBLs | 0 MCF | Jan 1991 - Jun 1997 |
| Kant Walter F | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 2002 |
| Kara Enterprises Inc | Wyoming | 0 BBLs | 0 MCF | Feb 1991 - Jul 2013 |
| Karlton Terry Oil Company | Wyoming | 0 BBLs | 0 MCF | Jun 1984 - Jan 1991 |
| Kase Energy LLC | Wyoming | 0 BBLs | 0 MCF | Jan 1985 - Aug 2006 |
| Katana Resources Inc | Wyoming | 0 BBLs | 0 MCF | Feb 1982 - Feb 2007 |
| Katherman Vance E | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 2004 |
| Kauffman K P Company Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1988 - Mar 1996 |
| KC Oil | Wyoming | 0 BBLs | 0 MCF | Feb 1996 - Sep 1999 |
| KC Resources Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1995 - Dec 2006 |
| KC Well Service | Wyoming | 0 BBLs | 1,898 MCF | Apr 2022 - Jan 2026 |
| KCS Medallion Resources Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1995 - Mar 1999 |
| KCS Mountain Resources Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1995 - Nov 2006 |
| Keas Production Company LLC | Wyoming | 207 BBLs | 0 MCF | Mar 2017 - Jan 2026 |
| Keba Energy LLC | Wyoming | 0 BBLs | 0 MCF | Nov 2009 - Nov 2014 |
| Kedco Management Corp | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1981 |
| Keith Walker O & G Co LLC | Wyoming | 153 BBLs | 0 MCF | Jul 1999 - Jan 2026 |
| Keiths Pumping Service | Wyoming | 0 BBLs | 0 MCF | Jul 1996 - Aug 2003 |
| Kekich John & Stroup Nancy | Wyoming | 0 BBLs | 0 MCF | Jan 1997 - Dec 1997 |
| Kelly Operating Company | Wyoming | 0 BBLs | 0 MCF | Jul 1989 - Oct 1991 |
| Kem Ventures LP | Wyoming | 0 BBLs | 0 MCF | Sep 2019 - Oct 2025 |
| Kemmerer Coal Co | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1981 |
| Kenai Oil & Gas Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jun 1987 |
| Kennedy & Kennedy Resources LLC | Wyoming | 0 BBLs | 0 MCF | Oct 2005 - Jun 2006 |
| Kennedy & Mitchell | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1988 |
| Kennedy George C | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Oct 2018 |
| Kennedy Oil | Wyoming | 3,122 BBLs | 16,215 MCF | Apr 1984 - Jan 2026 |
| Kentex Worland LLC | Wyoming | 0 BBLs | 0 MCF | Apr 2019 - Sep 2025 |
| Kentex Worland Operating Co LLC | Wyoming | 3,437 BBLs | 145,104 MCF | Oct 2025 - Feb 2026 |
| Kentta & Drwenski | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Nov 1995 |
| Kerr-McGee Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1996 |
| Kerr-McGee Oil & Gas Onshore LP | Wyoming | 2,200 BBLs | 7,712 MCF | Mar 1994 - Jan 2026 |
| Kerr-McGee Rocky Mountain Corporation | Wyoming | 0 BBLs | 0 MCF | Sep 2001 - Jan 2007 |
| Kerry Petroleum Co Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1982 - Sep 1995 |
| Kestrel Energy Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1998 - Jan 2008 |
| Kewanee Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Aug 1978 |
| Key Production Company | Wyoming | 0 BBLs | 0 MCF | Jan 1995 - Apr 2004 |
| Kiesling Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Oct 2007 |
| Kinder Morgan Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Mar 2007 |
| Kings Peak Energy LLC | Wyoming | 0 BBLs | 0 MCF | Sep 2017 - Feb 2019 |
| Kings X Oil Company LLC | Wyoming | 0 BBLs | 0 MCF | Jan 2009 - Aug 2016 |