| 5901 | Keen Operating Company, Inc. | Austin, TX 78705 | Oil & Gas Operator | Aug 2001 |
| 5902 | Keene, Roy J. Jr. | Sugar Land, TX 77498 | Oil & Gas Operator | Jun 2016 |
| 5903 | Keft Oil Company | Pleasanton, TX 78064 | Oil & Gas Operator | Feb 2003 |
| 5904 | Keirus, Inc. | Wichita Falls, TX 76310 | Oil & Gas Operator | Apr 2025 |
| 5905 | Keisling, H. N. | Pampa, TX 79065 | Oil & Gas Operator | Aug 2015 |
| 5906 | Keith F. Walker Oil & Gas Co., LLC | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2025 |
| 5907 | Keith Petroleum Corporation | Houston, TX 77063 | Oil & Gas Operator | Jan 1993 |
| 5908 | Kellco Energy, LTD. | Houston, TX 77057 | Oil & Gas Operator | Nov 2007 |
| 5909 | Kellerville Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Apr 2025 |
| 5910 | Kelley Oil Corporation | Houston, TX 77002 | Oil & Gas Operator | Jan 2002 |
| 5911 | Kelly Mahler Operating, LLC | Graham, TX 76450 | Oil Operator | Apr 2025 |
| 5912 | Kelly Resources, LTD. | Frisco, TX 75034 | Oil & Gas Operator | Aug 2004 |
| 5913 | Kelpetro, Inc. | Houston, TX 77056 | Oil & Gas Operator | Mar 2012 |
| 5914 | Kelsey Operating, Inc. | Houston, TX 77077 | Oil Operator | Feb 2022 |
| 5915 | Kelso Oil LLC | Chase, KS 67524 | Oil & Gas Operator | Apr 2007 |
| 5916 | Kelt Oil & Gas, Inc. | Torrance, CA 90503 | Oil & Gas Operator | Dec 2003 |
| 5917 | Kelton Oil & Gas Co | Wheeler, TX 79096 | Oil Operator | Jun 1991 |
| 5918 | Kelton, B.J. | Rosharon, TX 77583 | Oil & Gas Operator | Apr 2025 |
| 5919 | Kem Energy, Inc. | Katy, TX 77450 | Oil & Gas Operator | Apr 2025 |
| 5920 | Kemco Oil | Alice, TX 78332 | Oil & Gas Operator | Aug 2009 |
| 5921 | Kemp, Walter | Talpa, TX 76882 | Gas Operator | Apr 2025 |
| 5922 | Kemper Operating Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2015 |
| 5923 | Ken Petroleum Corporation | Dallas, TX 75206 | Oil & Gas Operator | Feb 2019 |
| 5924 | Ken-Cas Oil Co. | Levelland, TX 79336 | Oil & Gas Operator | Apr 1998 |
| 5925 | Kendrick Enterprises, Inc. | Burleson, TX 76028 | Oil Operator | Jun 1985 |
| 5926 | Kendrick Oil And Gas Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 5927 | Kendrick Oil Co. | Abilene, TX 79608 | Oil & Gas Operator | Mar 2008 |
| 5928 | Kendrick, Barbara S. | Baytown, TX 77521 | Oil Operator | Apr 2025 |
| 5929 | Kendrick, Paul W. | Baytown, TX 77520 | Oil & Gas Operator | Sep 2005 |
| 5930 | Kenne Exploration, Inc. | Missouri City, TX 77489 | Oil & Gas Operator | Apr 2025 |
| 5931 | Kennedy & Mitchell, Inc. | Houston, TX 77084 | Oil & Gas Operator | Aug 2013 |
| 5932 | Kennedy, Joseph D. | Stephenville, TX 76401 | Oil & Gas Operator | Jun 1995 |
| 5933 | Kennedy, R. R. Production, Inc. | MC Camey, TX 79752 | Oil & Gas Operator | Apr 2025 |
| 5934 | Kennemer, Darrell | Boyd, TX 76023 | Oil Operator | Apr 2025 |
| 5935 | Kenneth W. Cory, LTD. | Bellaire, TX 77401 | Oil & Gas Operator | Jan 2025 |
| 5936 | Kent, Charles Operating Co. Inc. | Powell, TX 75153 | Oil & Gas Operator | Dec 2007 |
| 5937 | Kenworthy Oil Company | Midland, TX 79710 | Oil & Gas Operator | Apr 2025 |
| 5938 | Kenworthy Operating Company | Tulsa, OK 74132 | Oil & Gas Operator | May 2009 |
| 5939 | Kepa Energy, L.C. | Marshall, TX 75670 | Oil & Gas Operator | Mar 1998 |
| 5940 | Kepco Operating, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
| 5941 | Kepco. Inc. | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 5942 | Kern Co. | Houston, TX 77095 | Oil & Gas Operator | Jan 2021 |
| 5943 | Kerns O & G, Inc. | San Antonio, TX 78232 | Oil & Gas Operator | Dec 2004 |
| 5944 | Kerns Petroleum, Inc. | San Antonio, TX 78257 | Oil & Gas Operator | Sep 2013 |
| 5945 | Kerogen Texas Energy Op LLC | Houston, TX 77060 | Oil & Gas Operator | Feb 2018 |
| 5946 | Kerr-McGee Corporation | Dallas, TX 75380 | Oil & Gas Operator | Jan 2025 |
| 5947 | Kerr-McGee Oil & Gas Corp. | Houston, TX 77251 | Oil & Gas Operator | Sep 2006 |
| 5948 | Kerr-McGee Oil & Gas Onshore LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2017 |
| 5949 | Kerr-McGee Oil & Gas Onshore LP | Houston, TX 77046 | Oil & Gas Operator | Apr 2025 |
| 5950 | Kerr-McGee Rocky Mountain Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2007 |
| 5951 | Kerrdog Resources, LLC | San Angelo, TX 76904 | Oil & Gas Operator | May 2024 |
| 5952 | Kerry Oil & Gas, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jan 2004 |
| 5953 | Kerry Petroleum Co Inc | Midland, TX 79708 | Oil & Gas Operator | Jun 2010 |
| 5954 | Kestrel Resources, Inc. | Dallas, TX 75204 | Oil & Gas Operator | Jan 2017 |
| 5955 | Kewanee Oil Company | Houston, TX 77001 | Oil & Gas Operator | Aug 1978 |
| 5956 | Key Energy Of Colorado, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2016 |
| 5957 | Key Energy Services, LLC | Houston, TX 77042 | Oil Operator | Jan 2025 |
| 5958 | Key Operating & Equipment, Inc. | Midlothian, TX 76065 | Oil & Gas Operator | Nov 2024 |
| 5959 | Key Petroleum Inc. | Houston, TX 77056 | Oil & Gas Operator | Aug 2003 |
| 5960 | Key Production Company, Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2025 |
| 5961 | Key, J. J. | Lubbock, TX 79416 | Oil & Gas Operator | Apr 2025 |
| 5962 | Keystone Energy LLC | Farmington, NM 87499 | Oil & Gas Operator | Feb 2025 |
| 5963 | Keystone Energy Oil & Gas, Inc. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2016 |
| 5964 | Keystone Exploration, Inc | College Sta, TX 77845 | Oil & Gas Operator | Apr 2025 |
| 5965 | Keystone Operating Co. | Round Rock, TX 78681 | Oil & Gas Operator | Apr 2025 |
| 5966 | Keystone Petroleum GP LLC | Irving, TX 75039 | Oil & Gas Operator | May 2012 |
| 5967 | Keystone Petroleum NM LLC | Irving, TX 75039 | Oil & Gas Operator | Jan 2016 |
| 5968 | Keyway Oil & Gas Operating LLC | Kilgore, TX 75663 | Oil Operator | Oct 2020 |
| 5969 | Kga Oil Company, Inc. | High Island, TX 77623 | Oil & Gas Operator | Aug 2004 |
| 5970 | Kiawah Resources, LLC | Houston, TX 77056 | Oil & Gas Operator | Nov 2017 |
| 5971 | Kibbe, Anna S. | Falfurrias, TX 78355 | Oil & Gas Operator | Sep 1998 |
| 5972 | Kidd Johnson Oil & Gas | San Angelo, TX 76904 | Oil & Gas Operator | Feb 2013 |
| 5973 | Kidd Johnson Oil & Gas, LLC | San Angelo, TX 76904 | Oil & Gas Operator | Apr 2025 |
| 5974 | Kidd Oil & Gas, LC | Dallas, TX 75219 | Oil & Gas Operator | Apr 1999 |
| 5975 | Kidd Production Co. | Luling, TX 78648 | Oil & Gas Operator | Apr 2025 |
| 5976 | Kids Future, L.L.C. | Bivins, TX 75555 | Oil Operator | Apr 2025 |
| 5977 | Kile Production | Cypress, TX 77410 | Oil & Gas Operator | Aug 2014 |
| 5978 | Killam Oil Co., LTD. | Laredo, TX 78042 | Oil & Gas Operator | Apr 2025 |
| 5979 | Killam Oil Company | Laredo, TX 78042 | Oil & Gas Operator | Mar 1994 |
| 5980 | Killer Rabbit Fields LLC | Monahans, TX 79756 | Oil & Gas Operator | Apr 2025 |
| 5981 | Killingsworth Oil Co. | Longview, TX 75606 | Oil & Gas Operator | Apr 2025 |
| 5982 | Killingsworth, Lee Operator | Longview, TX 75601 | Oil & Gas Operator | Jan 1999 |
| 5983 | Killion Well Service Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2014 |
| 5984 | Kilmarnock Oil Company, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Apr 2025 |
| 5985 | Kilpatrick Production Company | Tye, TX 79563 | Oil & Gas Operator | Apr 2025 |
| 5986 | Kimball Production Co. | Houston, TX 77042 | Oil & Gas Operator | Jul 2002 |
| 5987 | Kimbell Oil Company Of Texas | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 5988 | Kimbell Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 5989 | Kimberlin & Huitt | Jacksboro, TX 76458 | Oil & Gas Operator | Feb 1998 |
| 5990 | Kimberlin & Miller | Dallas, TX 75230 | Oil & Gas Operator | Apr 2025 |
| 5991 | Kimberlin Energy Group | Dallas, TX 75235 | Oil & Gas Operator | Apr 2025 |
| 5992 | Kimble Oil Company, Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2006 |
| 5993 | Kimbrel Oil Corporation | Tulsa, OK 74114 | Oil & Gas Operator | Apr 2025 |
| 5994 | Kimbrough Engineering Co, LLC | New Braunfels, TX 78132 | Oil & Gas Operator | Dec 2014 |
| 5995 | Kimbrough Oil Company | Iraan, TX 79744 | Oil Operator | Apr 2025 |
| 5996 | Kimbrough, D. E. | Iraan, TX 79744 | Oil & Gas Operator | Apr 2025 |
| 5997 | Kimlar Oil Company | Kermit, TX 79745 | Oil & Gas Operator | Apr 2025 |
| 5998 | Kimleco Petroleum, Inc. | Wichita Falls, TX 76301 | Oil & Gas Operator | Apr 2025 |
| 5999 | Kimmeridge Texas Gas, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 6000 | Kimsey, Roy E., Jr. | Midland, TX 79701 | Oil & Gas Operator | May 2018 |