| 1 | K P Kauffman Company Inc | Denver, CO 80203 | Oil & Gas Operator | Sep 2024 |
| 2 | K W B Oil Property MGMT Inc | | Oil & Gas Operator | Jun 2000 |
| 3 | Kaiser-Francis Oil Company | Tulsa, OK 74121 | Oil & Gas Operator | Nov 2024 |
| 4 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Aug 2024 |
| 5 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2010 |
| 6 | Keener Oil & Gas Company | Tulsa, OK 74119-4416 | Oil & Gas Operator | Sep 2024 |
| 7 | Kennec Trustee* Frank | | Gas Operator | Apr 2008 |
| 8 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Nov 2024 |
| 9 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Jan 2017 |
| 10 | KGH Operating Company | Billings, MT 59115 | Oil & Gas Operator | Aug 2024 |
| 11 | Kinder Morgan Co2 Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Sep 2024 |
| 12 | Klabzuba Oil & Gas Inc | Denver, CO 80202 | Oil & Gas Operator | Aug 2012 |
| 13 | KLT Gas Inc | Woodlands, TX 77380 | Oil & Gas Operator | Sep 2004 |
| 14 | Koch Exploration Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 15 | Kodiak Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Jul 2024 |
| 16 | Kriti Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2012 |
| 17 | KT Resources LLC | | Oil & Gas Operator | Sep 2024 |
| 18 | KTM Operating LLC | | Oil & Gas Operator | Aug 2024 |
| 19 | Kuenzler & Flora Reserve Company | | Oil Operator | Aug 2024 |
| 20 | Kugler* Dean & Joe Dba D-J Oil Company | | Oil & Gas Operator | Sep 2019 |
| 21 | Kykon Oil & Gas, Inc. | Billings, MT 59103 | Oil & Gas Operator | Feb 2009 |