| 6001 | Knickerbocker Land Resources | Fort Worth, TX 76116 | Oil & Gas Operator | Mar 2015 |
| 6002 | Knight, Reuben B. | Windthorst, TX 76389 | Oil & Gas Operator | Jul 2026 |
| 6003 | KNK Oil & Gas | Abilene, TX 79602 | Oil & Gas Operator | Dec 1996 |
| 6004 | Knobloch, Albert | Graham, TX 76450 | Oil & Gas Operator | Jul 2026 |
| 6005 | Knox Industries, Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2026 |
| 6006 | Knox, D. M., Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Mar 2000 |
| 6007 | Knox, H. A. | Graham, TX 76450 | Oil & Gas Operator | Aug 2003 |
| 6008 | Knox, Jack L. | Coleman, TX 76834 | Oil & Gas Operator | Jul 2026 |
| 6009 | Ko Operating | Merkel, TX 79536 | Oil & Gas Operator | Jul 2026 |
| 6010 | Ko Operating LLC | Austin, TX 78746 | Oil Operator | Jul 2026 |
| 6011 | Kocana Resources | Ranchos Taos, NM 87557 | Oil & Gas Operator | Jul 1999 |
| 6012 | Koch Exploration Company | Houston, TX 77046 | Oil & Gas Operator | Apr 2003 |
| 6013 | Koch Exploration Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 6014 | Koch Midstream Services Company | Wichita, KS 67201 | Oil & Gas Operator | Oct 2000 |
| 6015 | Koch, P. S. | Seguin, TX 78155 | Oil & Gas Operator | May 2018 |
| 6016 | Kodiak Drilling, Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 6017 | Kodiak Oil & Gas Inc | Muenster, TX 76252 | Oil & Gas Operator | Jul 2026 |
| 6018 | Kodiak Operating, L.L.C. | Olney, TX 76374 | Oil & Gas Operator | Jul 2026 |
| 6019 | Kodiak Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 1996 |
| 6020 | Kodiak Petroleum Inc | Englewood, CO 80155 | Oil & Gas Operator | Mar 2026 |
| 6021 | Kodiak Productions LTD | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2014 |
| 6022 | Kody Petroleum Co., Inc. | Daisetta, TX 77533 | Oil & Gas Operator | Jul 2026 |
| 6023 | Kohler Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 1994 |
| 6024 | Kohler Industrial Nat. Gas, Inc. | Kohler, WI 53044 | Gas Operator | Dec 2000 |
| 6025 | Kojo Energy, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Jul 2026 |
| 6026 | Koko Skadi, LLC | Austin, TX 78731 | Oil & Gas Operator | Jul 2026 |
| 6027 | Kokomo Energy, Inc. | Gorman, TX 76454 | Oil & Gas Operator | Jul 2026 |
| 6028 | Kokomo Oil Company | Houston, TX 77227 | Oil & Gas Operator | Apr 1998 |
| 6029 | Kolb, James | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2003 |
| 6030 | Kollao Properties LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2026 |
| 6031 | Koonce Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 1993 |
| 6032 | Koontz Oil Company | Nocona, TX 76255 | Oil Operator | Aug 2022 |
| 6033 | Koram Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2006 |
| 6034 | Korman Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2001 |
| 6035 | Kornye-Tillman Company | Cleburne, TX 76031 | Oil & Gas Operator | Jul 2026 |
| 6036 | Kosarek, Charlie | San Antonio, TX 78213 | Oil & Gas Operator | Oct 2006 |
| 6037 | Kouatli, Aiman M. | Caldwell, TX 77836 | Oil & Gas Operator | Jul 2026 |
| 6038 | Kovar Operating, LLC | Victoria, TX 77901 | Oil & Gas Operator | Sep 2021 |
| 6039 | Koven Production Co. | San Antonio, TX 78232 | Oil & Gas Operator | Aug 2003 |
| 6040 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 6041 | Kraker & Martin Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 6042 | Kram Energy | Corpus Christ, TX 78404 | Oil & Gas Operator | Jul 2026 |
| 6043 | Kramer Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2026 |
| 6044 | Kramer, Clifford A. | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 1997 |
| 6045 | Kramer, Frank & Ethel FLP | Graham, TX 76450 | Oil & Gas Operator | Sep 2014 |
| 6046 | Kramer, Frank C. | Graham, TX 76450 | Oil & Gas Operator | Apr 2004 |
| 6047 | KRC Operating, LLC | Corpus Christ, TX 78412 | Oil & Gas Operator | Oct 2025 |
| 6048 | Kremco Oil LLC | Wichita Falls, TX 76308 | Oil Operator | Jul 2026 |
| 6049 | Krenek Enterprises, Inc. | Lovelady, TX 75851 | Oil Operator | Jul 2026 |
| 6050 | Krescent Energy Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2013 |
| 6051 | KRF Production Company LLC | Houston, TX 77269 | Oil & Gas Operator | Jul 2026 |
| 6052 | Kriken Oil & Gas | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Jul 2005 |
| 6053 | Kriken Oil & Gas, Inc. | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Jul 2026 |
| 6054 | Krisco Oil Co. | Kermit, TX 79745 | Oil Operator | Jul 2022 |
| 6055 | Kristen Oil And Gas, Inc. | Edna, TX 77957 | Oil & Gas Operator | Jul 2026 |
| 6056 | Kriti Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2012 |
| 6057 | Kriti Te Energy, Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 2017 |
| 6058 | Krocan Energy Corporation | Bowling Green, KY 42102 | Oil & Gas Operator | Jul 2026 |
| 6059 | Krog Partners, LLC | Kilgore, TX 75663 | Oil Operator | Jul 2026 |
| 6060 | Kroh Operating LLC | River Oaks, TX 76114 | Oil & Gas Operator | Jul 2026 |
| 6061 | Krot Oil Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jul 2026 |
| 6062 | KRS Oil Company | Frisco, TX 75034 | Oil & Gas Operator | Apr 2020 |
| 6063 | Ksabe Energy Partners, LLC | Oklahoma City, OK 73106 | Oil Operator | Jul 2026 |
| 6064 | Kstone Energy, LLC | Oklahoma City, OK 73106 | Oil Operator | Jul 2026 |
| 6065 | KT Operating Company LLC | Dallas, TX 75231 | Oil & Gas Operator | Feb 2010 |
| 6066 | KTC Oil Enterprises, LLC | Dallas, TX 75247 | Oil & Gas Operator | Jul 2026 |
| 6067 | KTP Energy, Inc. | Lakewood, CO 80226 | Oil & Gas Operator | Aug 2019 |
| 6068 | Kuehne Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 6069 | Kuhn Oil Co Inc | Timber Lake, SD 57656 | Oil Operator | Dec 2025 |
| 6070 | Kukui Operating Company | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 6071 | Kunu Energy LLC | Wichita Falls, TX 76310 | Oil Operator | Jul 2026 |
| 6072 | Kuran Resources | Wichita Falls, TX 76308 | Oil Operator | Jul 2026 |
| 6073 | Kuykendall, IValene Estate | Electra, TX 76360 | Oil & Gas Operator | Dec 1998 |
| 6074 | Kuykendall, M. C. | Electra, TX 76360 | Oil & Gas Operator | Apr 1995 |
| 6075 | Kuykendall, M.C., Estate | Electra, TX 76360 | Oil & Gas Operator | Aug 2003 |
| 6076 | KVL Operating, LLC | Midland, TX 79708 | Oil & Gas Operator | Jul 2026 |
| 6077 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 6078 | KWS Oil & Gas, LLC | Wink, TX 79789 | Oil & Gas Operator | Jul 2026 |
| 6079 | Kynge Energy Investments LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2026 |
| 6080 | Kynosa Inc. | Levelland, TX 79336 | Oil & Gas Operator | Jun 1998 |
| 6081 | KZ Global Energy, LLC | Houston, TX 77042 | Oil & Gas Operator | Jul 2026 |
| 6082 | L & B Oil And Gas Equipment, LLC | Palmhurst, TX 78573 | Oil & Gas Operator | Jul 2026 |
| 6083 | L & B Oil Company Inc | Dallas, TX 75225 | Oil & Gas Operator | Mar 2025 |
| 6084 | L & B Production | Big Lake, TX 76932 | Oil & Gas Operator | Jul 2026 |
| 6085 | L & D, Inc. | San Angelo, TX 76906 | Oil & Gas Operator | May 2019 |
| 6086 | L & F Drilling Co., Inc. (1) | Corpus Chrsti, TX 78479 | Oil & Gas Operator | Jul 2026 |
| 6087 | L & G Oil Company | Longview, TX 75606 | Oil & Gas Operator | Aug 2000 |
| 6088 | L & G Operating, Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2021 |
| 6089 | L & H Oil Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 1999 |
| 6090 | L & J Exploration, LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Jul 2026 |
| 6091 | L & J Oil | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2000 |
| 6092 | L & J Oil Co. | Borger, TX 79007 | Oil & Gas Operator | Apr 1999 |
| 6093 | L & L Resources, Inc. | Hays, KS 67601 | Oil Operator | Mar 1986 |
| 6094 | L & M Operating, Inc. | Big Lake, TX 76932 | Oil & Gas Operator | Jul 2026 |
| 6095 | L & R Drilling Company | Belle Fourche, SD 57717 | Oil & Gas Operator | Dec 1999 |
| 6096 | L & R Energy Corporation | Spearman, TX 79081 | Oil & Gas Operator | Nov 2014 |
| 6097 | L & R Petroleum | Kilgore, TX 75663 | Oil & Gas Operator | Jul 2026 |
| 6098 | L & S Drilling, Inc. | Kamay, TX 76369 | Oil & Gas Operator | Mar 2016 |
| 6099 | L & W Operators | Pampa, TX 79066 | Oil & Gas Operator | Jan 2018 |
| 6100 | L A Productions | Sunset, TX 76270 | Oil & Gas Operator | Jul 2026 |