| 6101 | Kraker & Martin Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 6102 | Kram Energy | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Apr 2025 |
| 6103 | Kramer Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2025 |
| 6104 | Kramer, Clifford A. | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 1997 |
| 6105 | Kramer, Frank & Ethel FLP | Graham, TX 76450 | Oil & Gas Operator | Sep 2014 |
| 6106 | Kramer, Frank C. | Graham, TX 76450 | Oil & Gas Operator | Apr 2004 |
| 6107 | KRC Operating, LLC | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Apr 2025 |
| 6108 | Kremco Oil LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 6109 | Krenek Enterprises, Inc. | Lovelady, TX 75851 | Oil Operator | Apr 2025 |
| 6110 | Krescent Energy Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2013 |
| 6111 | KRF Production Company LLC | Houston, TX 77269 | Oil & Gas Operator | Apr 2025 |
| 6112 | Kriken Oil & Gas | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Jul 2005 |
| 6113 | Kriken Oil & Gas, Inc. | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Apr 2025 |
| 6114 | Kristen Oil And Gas, Inc. | Edna, TX 77957 | Oil & Gas Operator | Apr 2025 |
| 6115 | Kriti Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2012 |
| 6116 | Kriti Te Energy, Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 2017 |
| 6117 | Krocan Energy Corporation | Bowling Green, KY 42102 | Oil & Gas Operator | Apr 2025 |
| 6118 | Krog Partners, LLC | Kilgore, TX 75663 | Oil Operator | Apr 2025 |
| 6119 | Kroh Operating LLC | Fort Worth, TX 76114 | Oil & Gas Operator | Apr 2025 |
| 6120 | Krot Oil Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2025 |
| 6121 | KRS Oil Company | Frisco, TX 75034 | Oil & Gas Operator | Apr 2020 |
| 6122 | Ksabe Energy Partners, LLC | Oklahoma City, OK 73106 | Oil Operator | Apr 2025 |
| 6123 | Kstone Energy, LLC | Oklahoma City, OK 73106 | Oil Operator | Apr 2025 |
| 6124 | KT Operating Company LLC | Dallas, TX 75231 | Oil & Gas Operator | Feb 2010 |
| 6125 | KTC Oil Enterprises, LLC | Dallas, TX 75247 | Oil & Gas Operator | Apr 2025 |
| 6126 | KTP Energy, Inc. | Denver, CO 80226 | Oil & Gas Operator | Aug 2019 |
| 6127 | Kuehne Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 6128 | Kuhn Oil Co Inc | Timber Lake, SD 57656 | Oil Operator | Dec 2023 |
| 6129 | Kukui Operating Company | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 6130 | Kunu Energy LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 6131 | Kuran Resources | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 6132 | Kuykendall, IValene Estate | Electra, TX 76360 | Oil & Gas Operator | Dec 1998 |
| 6133 | Kuykendall, M. C. | Electra, TX 76360 | Oil & Gas Operator | Apr 1995 |
| 6134 | Kuykendall, M.C., Estate | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 6135 | KVL Operating, LLC | Midland, TX 79708 | Oil & Gas Operator | Apr 2025 |
| 6136 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 6137 | KWS Oil & Gas, LLC | El Campo, TX 77437 | Oil & Gas Operator | Apr 2025 |
| 6138 | Kynge Energy Investments LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 6139 | Kynosa Inc. | Levelland, TX 79336 | Oil & Gas Operator | Jun 1998 |
| 6140 | KZ Global Energy, LLC | Houston, TX 77042 | Oil & Gas Operator | Apr 2025 |
| 6141 | L & B Oil And Gas Equipment, LLC | Palmhurst, TX 78573 | Oil & Gas Operator | Apr 2025 |
| 6142 | L & B Production | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2025 |
| 6143 | L & D, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2019 |
| 6144 | L & F Drilling Co., Inc. (1) | Corpus Chrsti, TX 78479 | Oil & Gas Operator | Apr 2025 |
| 6145 | L & G Oil Company | Longview, TX 75606 | Oil & Gas Operator | Aug 2000 |
| 6146 | L & G Operating, Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2021 |
| 6147 | L & H Oil Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 1999 |
| 6148 | L & J Exploration, LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Apr 2025 |
| 6149 | L & J Oil | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2000 |
| 6150 | L & J Oil Co. | Borger, TX 79007 | Oil & Gas Operator | Apr 1999 |
| 6151 | L & L Resources, Inc. | Hays, KS 67601 | Oil Operator | Mar 1986 |
| 6152 | L & M Operating, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Apr 2025 |
| 6153 | L & R Drilling Company | Belle Fourche, SD 57717 | Oil & Gas Operator | Dec 1999 |
| 6154 | L & R Energy Corporation | Spearman, TX 79081 | Oil & Gas Operator | Nov 2014 |
| 6155 | L & R Petroleum | Kilgore, TX 75663 | Oil & Gas Operator | Apr 2025 |
| 6156 | L & S Drilling, Inc. | Kamay, TX 76369 | Oil & Gas Operator | Mar 2016 |
| 6157 | L & T Oil Co., Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2025 |
| 6158 | L & W Operators | Pampa, TX 79066 | Oil & Gas Operator | Jan 2018 |
| 6159 | L A Productions | Sunset, TX 76270 | Oil & Gas Operator | Apr 2025 |
| 6160 | L And C Leasing, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2019 |
| 6161 | L And L Production Company | Skellytown, TX 79080 | Oil & Gas Operator | Sep 1996 |
| 6162 | L L & M Properties, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Aug 2004 |
| 6163 | L R Operating Co. | Graford, TX 76449 | Oil & Gas Operator | Apr 2025 |
| 6164 | L-83, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 1995 |
| 6165 | L-R Production | Olney, TX 76374 | Oil & Gas Operator | Apr 2025 |
| 6166 | L-Reno Oil And Gas LLC | Graford, TX 76449 | Oil & Gas Operator | Apr 2025 |
| 6167 | L-Texx Petroleum, LP | Arlington, TX 76013 | Oil & Gas Operator | Apr 2025 |
| 6168 | L. S. K. L. Oil Co. | Buda, TX 78610 | Oil & Gas Operator | Apr 2025 |
| 6169 | L.C.S. Production Company | Abilene, TX 79608 | Oil & Gas Operator | Apr 2025 |
| 6170 | L.J. Resources, LLC | Graham, TX 76450 | Gas Operator | Apr 2025 |
| 6171 | L.J.M. Corporation | Houston, TX 77025 | Oil & Gas Operator | Jun 2012 |
| 6172 | L.L. Oil Company | Freer, TX 78357 | Oil & Gas Operator | Apr 2025 |
| 6173 | L.O.G. Energy Exploration, LTD. | Laredo, TX 78041 | Oil & Gas Operator | Apr 2025 |
| 6174 | L.T.D. Explorations Inc. | Alice, TX 78333 | Oil & Gas Operator | Apr 2025 |
| 6175 | L2SG Production, LLC | Nocona, TX 76255 | Oil Operator | May 2020 |
| 6176 | L7 Energy LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 6177 | La Aceite Energy, Inc. | Abilene, TX 79605 | Oil & Gas Operator | Apr 2025 |
| 6178 | La Campana, Inc. | Port Aransas, TX 78373 | Oil & Gas Operator | Apr 2025 |
| 6179 | La Jolla Oil & Gas, Inc. | Frisco, TX 75034 | Oil & Gas Operator | Apr 2025 |
| 6180 | La Mar, Paul W. | Nocona, TX 76255 | Oil & Gas Operator | May 1995 |
| 6181 | La Parrita Oil & Gas, Inc. | Rosenberg, TX 77471 | Oil & Gas Operator | May 2002 |
| 6182 | La Plata Gathering System Inc | Dallas, TX 75206 | Gas Operator | Nov 2023 |
| 6183 | La Roca Energy, LP | Dallas, TX 75207 | Oil & Gas Operator | May 2024 |
| 6184 | La Ronya Oil & Gas | George West, TX 78022 | Gas Operator | Apr 2025 |
| 6185 | La Sara Operating Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Dec 2015 |
| 6186 | La Vernia Oil | La Vernia, TX 78121 | Oil Operator | Apr 2025 |
| 6187 | La Vernia Oil Co. | La Vernia, TX 78121 | Oil & Gas Operator | Aug 2003 |
| 6188 | La VIda Energy Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 1993 |
| 6189 | Lace Operating | Fort Worth, TX 76114 | Oil & Gas Operator | Jun 1997 |
| 6190 | Lackey, William H. Oil And Gas | Shawnee, OK 74804 | Oil & Gas Operator | Feb 2024 |
| 6191 | Laclede Operating Co. | Pampa, TX 79065 | Gas Operator | Aug 1999 |
| 6192 | Lacy 03, LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2025 |
| 6193 | Lacy Operations, LTD. | Longview, TX 75606 | Oil & Gas Operator | Oct 2012 |
| 6194 | Lacy, F. B. Inc. | Houston, TX 77055 | Oil & Gas Operator | Sep 1997 |
| 6195 | Lacy, J. W., Jr. | Midland, TX 79702 | Oil & Gas Operator | Dec 2007 |
| 6196 | Lacy, R., Inc. | Longview, TX 75606 | Oil & Gas Operator | Jan 2002 |
| 6197 | Ladd LLC | El Reno, OK 73036 | Oil & Gas Operator | Nov 2018 |
| 6198 | Ladd Oil & Gas Corporation | Midland, TX 79711 | Oil & Gas Operator | Dec 2021 |
| 6199 | Ladd Operating Company | Midland, TX 79711 | Oil & Gas Operator | Mar 2008 |
| 6200 | Ladd Petroleum Corp. | Denver, CO 80202 | Oil & Gas Operator | Oct 2004 |