| 6001 | Kindee Oil & Gas Texas, LLC | Houston, TX 77084 | Oil & Gas Operator | Apr 2016 |
| 6002 | Kinder & Petty | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6003 | Kinder Morgan Co2 Company, L.P. | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 6004 | Kinder Morgan Production Co LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 6005 | Kinder Morgan Production Co LP | Midland, TX 79701 | Oil & Gas Operator | Jul 2007 |
| 6006 | Kinder Morgan Sacroc LP | Snyder, TX 79549 | Oil & Gas Operator | Dec 2003 |
| 6007 | Kinder Morgan Tejas Pipeline LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 6008 | Kindred Petroleum Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 6009 | King & West | Wichita Falls, TX 76307 | Oil & Gas Operator | May 1994 |
| 6010 | King Energy Resources | Kerrville, TX 78029 | Oil & Gas Operator | Dec 2025 |
| 6011 | King Oil & Gas Co. | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 6012 | King Oil & Resources Co | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 6013 | King Operating Corporation | Fort Worth, TX 76147 | Oil & Gas Operator | Dec 2025 |
| 6014 | King Ranch Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | Nov 1999 |
| 6015 | King Ranch Oil & Gas, Inc. | Houston, TX 77002 | Oil & Gas Operator | Dec 1997 |
| 6016 | King-Goen Oil, LLC | Abilene, TX 79602 | Oil Operator | Dec 2025 |
| 6017 | Kingdom Resources Corporation | Austin, TX 78701 | Oil & Gas Operator | Sep 1993 |
| 6018 | Kingery Drilling Co., Inc. | Ardmore, OK 73402 | Oil & Gas Operator | Sep 2025 |
| 6019 | Kingery, Johnny | Clyde, TX 79510 | Oil & Gas Operator | Oct 1997 |
| 6020 | Kingfish Gathering LLC | Lago VIsta, TX 78645 | Oil & Gas Operator | Dec 2025 |
| 6021 | Kingman Operating Company, Inc. | Austin, TX 78729 | Oil Operator | Jun 2013 |
| 6022 | Kingwood Exploration LLC | Shreveport, LA 71105 | Oil & Gas Operator | Dec 2025 |
| 6023 | Kingwood Oil Co; Inc | Luling, TX 78648 | Oil & Gas Operator | Nov 2015 |
| 6024 | Kingwood Resources, Inc. | Kingwood, TX 77339 | Oil & Gas Operator | May 2022 |
| 6025 | Kinlaw Oil Corporation | Dallas, TX 75380 | Oil & Gas Operator | Dec 2025 |
| 6026 | Kinney Incorporated | Andrews, TX 79714 | Oil & Gas Operator | Dec 2025 |
| 6027 | Kintex Petroleum Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 2025 |
| 6028 | Kirkpatrick Oil & Gas Co. | Pampa, TX 79066 | Oil & Gas Operator | Apr 1996 |
| 6029 | Kirkpatrick Oil & Gas L.L.C. | Midland, TX 79701 | Oil & Gas Operator | Dec 2010 |
| 6030 | Kirkpatrick Oil Company | Nichols Hill, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 6031 | Kirkpatrick, John Oil LLC | Victoria, TX 77905 | Oil & Gas Operator | Dec 2025 |
| 6032 | Kismet Properties, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Dec 2025 |
| 6033 | Kiva Resources Inc. | Houston, TX 77265 | Oil & Gas Operator | Mar 2008 |
| 6034 | KJ Energy, LLC | MT Enterprise, TX 75681 | Oil & Gas Operator | Jul 2024 |
| 6035 | Klabzuba Brothers LLC | Prague, OK 74864-0567 | Oil & Gas Operator | Jul 2007 |
| 6036 | Klabzuba Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 2013 |
| 6037 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 6038 | Klaeger Operating Company II,LLC | Marble Falls, TX 78654 | Oil Operator | Dec 2025 |
| 6039 | Klaeger Operating Company, LLC | Marble Falls, TX 78654 | Oil Operator | Dec 2025 |
| 6040 | Klaeger, J. H. | Hondo, TX 78861 | Oil & Gas Operator | Dec 2009 |
| 6041 | Klassen Energy, Inc. | Cisco, TX 76437 | Oil & Gas Operator | Dec 2025 |
| 6042 | Klause & Klaus Oil Co. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2003 |
| 6043 | Klein, J. L. | Henrietta, TX 76365 | Oil & Gas Operator | Sep 2013 |
| 6044 | KLH Oil & Gas, Inc. | Cross Plains, TX 76443 | Oil & Gas Operator | Dec 2025 |
| 6045 | Kling, Inc. | Corpus Chrsti, TX 78473 | Oil & Gas Operator | Dec 2000 |
| 6046 | Klingberg, Roger | Cross Plains, TX 76443 | Oil & Gas Operator | Jan 2017 |
| 6047 | KLM Petroleum Corp. | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 6048 | Klo Oil & Gas, L.L.C. | Tulsa, OK 74120 | Oil & Gas Operator | Jan 2023 |
| 6049 | Klock, Ted | Corsicana, TX 75110 | Oil Operator | Jul 2022 |
| 6050 | Klotzman, M. S. Exploration Co. | Victoria, TX 77903 | Oil & Gas Operator | Dec 2025 |
| 6051 | Klutts, Carlos J. | Austin, TX 78711 | Oil & Gas Operator | Apr 2002 |
| 6052 | KMK Oil & Gas, Inc. | Marshall, TX 75671 | Oil & Gas Operator | Dec 2025 |
| 6053 | KND Oil & Gas, LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Nov 2023 |
| 6054 | Kneupper Oil, LLC | MC Camey, TX 79752 | Oil & Gas Operator | Dec 2025 |
| 6055 | KNG Producers | Dumas, TX 79029 | Oil & Gas Operator | Oct 2009 |
| 6056 | Knickerbocker Land Resources | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2015 |
| 6057 | Knight, Reuben B. | Windthorst, TX 76389 | Oil & Gas Operator | Dec 2025 |
| 6058 | KNK Oil & Gas | Abilene, TX 79602 | Oil & Gas Operator | Dec 1996 |
| 6059 | Knobloch, Albert | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6060 | Knox Industries, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 6061 | Knox, D. M., Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2000 |
| 6062 | Knox, H. A. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 6063 | Knox, Jack L. | Coleman, TX 76834 | Oil & Gas Operator | Dec 2025 |
| 6064 | Ko Operating | Merkel, TX 79536 | Oil & Gas Operator | Dec 2025 |
| 6065 | Ko Operating LLC | Austin, TX 78746 | Oil Operator | Dec 2025 |
| 6066 | Kocana Resources | Ranchos Taos, NM 87557 | Oil & Gas Operator | Jul 1999 |
| 6067 | Koch Exploration Company | Houston, TX 77046 | Oil & Gas Operator | Apr 2003 |
| 6068 | Koch Exploration Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 6069 | Koch Midstream Services Company | Wichita, KS 67201 | Oil & Gas Operator | Oct 2000 |
| 6070 | Koch, P. S. | Seguin, TX 78155 | Oil & Gas Operator | May 2018 |
| 6071 | Kodiak Drilling, Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 6072 | Kodiak Oil & Gas Inc | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 6073 | Kodiak Operating, L.L.C. | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 6074 | Kodiak Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 1996 |
| 6075 | Kodiak Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Jun 2025 |
| 6076 | Kodiak Productions LTD | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2014 |
| 6077 | Kody Petroleum Co., Inc. | Daisetta, TX 77533 | Oil & Gas Operator | Dec 2025 |
| 6078 | Kohler Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 1994 |
| 6079 | Kohler Industrial Nat. Gas, Inc. | Kohler, WI 53044 | Gas Operator | Dec 2000 |
| 6080 | Kojo Energy, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Dec 2025 |
| 6081 | Koko Skadi, LLC | Austin, TX 78731 | Oil & Gas Operator | Dec 2025 |
| 6082 | Kokomo Energy, Inc. | Gorman, TX 76454 | Oil & Gas Operator | Dec 2025 |
| 6083 | Kokomo Oil Company | Houston, TX 77227 | Oil & Gas Operator | Apr 1998 |
| 6084 | Kolb, James | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2003 |
| 6085 | Kollao Properties LLC | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 6086 | Konantz, Ronald J. Inc. | Houma, LA 70360 | Oil & Gas Operator | Dec 2025 |
| 6087 | Koonce Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 1993 |
| 6088 | Koontz Oil Company | Nocona, TX 76255 | Oil Operator | Aug 2022 |
| 6089 | Koram Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2006 |
| 6090 | Korman Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2001 |
| 6091 | Kornye-Tillman Company | Cleburne, TX 76031 | Oil & Gas Operator | Dec 2025 |
| 6092 | Kosarek, Charlie | San Antonio, TX 78213 | Oil & Gas Operator | Oct 2006 |
| 6093 | Kouatli, Aiman M. | Caldwell, TX 77836 | Oil & Gas Operator | Dec 2025 |
| 6094 | Kovar Operating, LLC | Victoria, TX 77901 | Oil & Gas Operator | Sep 2021 |
| 6095 | Koven Production Co. | San Antonio, TX 78232 | Oil & Gas Operator | Aug 2003 |
| 6096 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 6097 | Kraker & Martin Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 6098 | Kram Energy | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Dec 2025 |
| 6099 | Kramer Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 6100 | Kramer, Clifford A. | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 1997 |