| 6001 | Kaye Poth Oil Corp. | Seguin, TX 78155 | Oil & Gas Operator | May 1998 |
| 6002 | Kayuga Co. | Tulsa, OK 74133 | Oil & Gas Operator | Feb 2026 |
| 6003 | KC Resources Inc | Snowmass VLG., CO 81615 | Oil & Gas Operator | Oct 2025 |
| 6004 | KCM Management, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Oct 2014 |
| 6005 | KCR Energy, L.L.C. | Fate, TX 75132 | Oil Operator | Feb 2026 |
| 6006 | KCS Medallion Resources, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2018 |
| 6007 | KCS Resources LLC | Houston, TX 77027 | Oil & Gas Operator | Feb 2017 |
| 6008 | KCS Resources, Inc. | Houston, TX 77002 | Oil & Gas Operator | Feb 2009 |
| 6009 | KD Energy, LLC | Houston, TX 77056 | Oil & Gas Operator | Feb 2026 |
| 6010 | KDM Operating, LLC | The Woodlands, TX 77380 | Oil Operator | Feb 2026 |
| 6011 | KDM Production Co | Ozona, TX 76943 | Oil & Gas Operator | Feb 2026 |
| 6012 | Keahey Exploration, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Mar 2002 |
| 6013 | Keating Energy, Inc. | FT Washington, PA 19034 | Oil & Gas Operator | Feb 2026 |
| 6014 | Kebo Oil & Gas, Inc. | Portland, TX 78374 | Oil & Gas Operator | Feb 2026 |
| 6015 | Kec Enterprises, Inc. | Springtown, TX 76082 | Oil & Gas Operator | Feb 2026 |
| 6016 | Keeley Oil, L.L.C. | Dallas, TX 75225 | Oil Operator | Feb 2026 |
| 6017 | Keen Operating Company, Inc. | Austin, TX 78705 | Oil & Gas Operator | Aug 2001 |
| 6018 | Keene, Roy J. Jr. | Sugar Land, TX 77498 | Oil & Gas Operator | Jun 2016 |
| 6019 | Keft Oil Company | Pleasanton, TX 78064 | Oil & Gas Operator | Feb 2003 |
| 6020 | Keirus, Inc. | Wichita Falls, TX 76310 | Oil & Gas Operator | Feb 2026 |
| 6021 | Keisling Energy, LLC | Dumas, TX 79029 | Gas Operator | Feb 2026 |
| 6022 | Keisling, H. N. | Pampa, TX 79065 | Oil & Gas Operator | Aug 2015 |
| 6023 | Keith F Walker Oil & Gas Company LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Dec 2025 |
| 6024 | Keith Petroleum Corporation | Houston, TX 77063 | Oil & Gas Operator | Jan 1993 |
| 6025 | Kek Exploration LLC | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 6026 | Kellco Energy, LTD. | Houston, TX 77057 | Oil & Gas Operator | Nov 2007 |
| 6027 | Kellerville Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Feb 2026 |
| 6028 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 6029 | Kelly Mahler Operating, LLC | Graham, TX 76450 | Oil Operator | Feb 2026 |
| 6030 | Kelly Resources, LTD. | Frisco, TX 75034 | Oil & Gas Operator | Aug 2004 |
| 6031 | Kelpetro, Inc. | Houston, TX 77056 | Oil & Gas Operator | Mar 2012 |
| 6032 | Kelsey Operating, Inc. | Houston, TX 77077 | Oil Operator | Feb 2022 |
| 6033 | Kelso Oil LLC | Chase, KS 67524 | Oil & Gas Operator | Apr 2007 |
| 6034 | Kelt Oil & Gas, Inc. | Torrance, CA 90503 | Oil & Gas Operator | Dec 2003 |
| 6035 | Kelton Oil & Gas Co | Wheeler, TX 79096 | Oil Operator | Jun 1991 |
| 6036 | Kelton, B.J. | Rosharon, TX 77583 | Oil & Gas Operator | Feb 2026 |
| 6037 | Kem Energy, Inc. | Katy, TX 77450 | Oil & Gas Operator | Feb 2026 |
| 6038 | Kemco Oil | Alice, TX 78332 | Oil & Gas Operator | Aug 2009 |
| 6039 | Kemp, Walter | Talpa, TX 76882 | Gas Operator | Feb 2026 |
| 6040 | Kemper Operating Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2015 |
| 6041 | Ken Petroleum Corporation | Dallas, TX 75206 | Oil & Gas Operator | Feb 2019 |
| 6042 | Ken-Cas Oil Co. | Levelland, TX 79336 | Oil & Gas Operator | Apr 1998 |
| 6043 | Kendrick Oil And Gas Company | Abilene, TX 79608 | Oil & Gas Operator | Feb 2026 |
| 6044 | Kendrick Oil Co. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2008 |
| 6045 | Kendrick, Barbara S. | Baytown, TX 77521 | Oil Operator | Feb 2026 |
| 6046 | Kendrick, Paul W. | Baytown, TX 77520 | Oil & Gas Operator | Sep 2005 |
| 6047 | Kenne Exploration, Inc. | Missouri City, TX 77489 | Oil & Gas Operator | Feb 2026 |
| 6048 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 6049 | Kennedy, Joseph D. | Stephenville, TX 76401 | Oil & Gas Operator | Jun 1995 |
| 6050 | Kennedy, R. R. Production, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Feb 2026 |
| 6051 | Kennemer, Darrell | Boyd, TX 76023 | Oil Operator | Feb 2026 |
| 6052 | Kenneth W Cory LTD | Bellaire, TX 77401 | Oil & Gas Operator | Nov 2025 |
| 6053 | Kent, Charles Operating Co. Inc. | Powell, TX 75153 | Oil & Gas Operator | Dec 2007 |
| 6054 | Kenworthy Oil Company | Midland, TX 79710 | Oil & Gas Operator | Feb 2026 |
| 6055 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 6056 | Kepa Energy, L.C. | Marshall, TX 75670 | Oil & Gas Operator | Mar 1998 |
| 6057 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Nov 2025 |
| 6058 | Kepco. Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 6059 | Kern Co. | Houston, TX 77095 | Oil & Gas Operator | Jan 2021 |
| 6060 | Kerns O & G, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Dec 2004 |
| 6061 | Kerns Petroleum, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | Sep 2013 |
| 6062 | Kerogen Texas Energy Op LLC | Houston, TX 77060 | Oil & Gas Operator | Feb 2018 |
| 6063 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Sep 2025 |
| 6064 | Kerr-McGee Oil & Gas Corp. | Houston, TX 77251 | Oil & Gas Operator | Sep 2006 |
| 6065 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 6066 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Feb 2026 |
| 6067 | Kerr-McGee Rocky Mountain Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2007 |
| 6068 | Kerry Oil & Gas, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jan 2004 |
| 6069 | Kerry Petroleum Co Inc | Midland, TX 79708 | Oil & Gas Operator | Jun 2010 |
| 6070 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Sep 2015 |
| 6071 | Kewanee Oil Company | Houston, TX 77001 | Oil & Gas Operator | Aug 1978 |
| 6072 | Key Energy Of Colorado, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2016 |
| 6073 | Key Energy Services, LLC | Houston, TX 77042 | Oil Operator | Jan 2025 |
| 6074 | Key Operating & Equipment, Inc. | Midlothian, TX 76065 | Oil & Gas Operator | Nov 2024 |
| 6075 | Key Petroleum Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 6076 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Nov 2025 |
| 6077 | Key, J. J. | Lubbock, TX 79416 | Oil & Gas Operator | Feb 2026 |
| 6078 | Keystone Energy LLC | Farmington, NM 87499 | Oil & Gas Operator | Dec 2025 |
| 6079 | Keystone Energy Oil & Gas Inc | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2016 |
| 6080 | Keystone Exploration, Inc | College Sta, TX 77845 | Oil & Gas Operator | Feb 2026 |
| 6081 | Keystone Operating Co. | Round Rock, TX 78681 | Oil & Gas Operator | Feb 2026 |
| 6082 | Keystone Petroleum GP LLC | Irving, TX 75039 | Oil & Gas Operator | May 2012 |
| 6083 | Keystone Petroleum NM LLC | Irving, TX 75039 | Oil & Gas Operator | Jan 2016 |
| 6084 | Keyway Oil & Gas Operating LLC | Kilgore, TX 75663 | Oil Operator | Oct 2020 |
| 6085 | Kga Oil Company, Inc. | High Island, TX 77623 | Oil & Gas Operator | Aug 2004 |
| 6086 | Kiamichi Oil & Gas | Whitehouse, TX 75791 | Oil Operator | Oct 1997 |
| 6087 | Kiawah Resources, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2017 |
| 6088 | Kibbe, Anna S. | Falfurrias, TX 78355 | Oil & Gas Operator | Sep 1998 |
| 6089 | Kidd Johnson Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Feb 2013 |
| 6090 | Kidd Johnson Oil & Gas, LLC | San Angelo, TX 76904 | Oil & Gas Operator | Feb 2026 |
| 6091 | Kidd Oil & Gas, LC | Dallas, TX 75219 | Oil & Gas Operator | Apr 1999 |
| 6092 | Kidd Production Co. | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 6093 | Kids Future, L.L.C. | Bivins, TX 75555 | Oil Operator | Feb 2026 |
| 6094 | Kile Production | Cypress, TX 77410 | Oil & Gas Operator | Aug 2014 |
| 6095 | Killam Oil Co., LTD. | Laredo, TX 78042 | Oil & Gas Operator | Feb 2026 |
| 6096 | Killam Oil Company | Laredo, TX 78042 | Oil & Gas Operator | Mar 1994 |
| 6097 | Killer Rabbit Fields LLC | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 6098 | Killingsworth Oil Co. | Longview, TX 75606 | Oil & Gas Operator | Feb 2026 |
| 6099 | Killingsworth, Lee Operator | Longview, TX 75601 | Oil & Gas Operator | Jan 1999 |
| 6100 | Killion Well Service Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2014 |