| 901 | Kracken Operating LLC | Lawrence, KS 66047 | Oil Operator | Dec 2019 |
| 902 | Kraemer II LLC | | Oil & Gas Operator | Dec 2000 |
| 903 | Kraft Oil Compan | | Oil Operator | Nov 1994 |
| 904 | Kraft Oil Company LLC | Gridley, KS 66852 | Oil Operator | Sep 2025 |
| 905 | Kraft Petroleum Corporation | Conshohocken, PA 19428 | Gas Operator | Sep 2006 |
| 906 | Kraft, Jim - Oil Operations | Holyrood, KS 67450 | Oil Operator | Jan 1999 |
| 907 | Kraft, R L | | Oil Operator | Dec 2023 |
| 908 | Kraken Development III, LLC | | Oil & Gas Operator | Nov 2021 |
| 909 | Kraken Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Dec 2025 |
| 910 | Kraker & Martin Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 911 | Kraker Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 1995 |
| 912 | Krakrow, Inc. | Spencer, WV 25276-1007 | Oil & Gas Operator | Dec 2021 |
| 913 | Kram Energy | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Feb 2026 |
| 914 | Kramer Exploration Co. | Delaware, OH 43015 | Oil & Gas Operator | Dec 2009 |
| 915 | Kramer Oil Field Service Inc | Wellsville, KS 66092 | Oil Operator | May 2019 |
| 916 | Kramer Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Feb 2026 |
| 917 | Kramer, Clifford A. | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 1997 |
| 918 | Kramer, Frank & Ethel FLP | Graham, TX 76450 | Oil & Gas Operator | Sep 2014 |
| 919 | Kramer, Frank C. | Graham, TX 76450 | Oil & Gas Operator | Apr 2004 |
| 920 | Krams Oil & Gas LLC | Lewisville, OH 43754 | Oil & Gas Operator | Dec 2024 |
| 921 | Kranz, Thomas | East Aurora, NY 14052 | Gas Operator | Dec 2024 |
| 922 | Kratos Operating, LLC | Hobbs, NM 88241 | Oil & Gas Operator | Sep 2025 |
| 923 | Kratzer Oil LLC | | Oil Operator | Sep 2025 |
| 924 | Kraus Edward L | Medina, OH 44256-8401 | Oil & Gas Operator | Dec 2024 |
| 925 | Krause, Michael J. & Tracy A. | Orchard Park, NY 14127 | Gas Operator | Dec 2024 |
| 926 | KRB Enterprise, Inc. | | Oil Operator | Dec 2025 |
| 927 | KRC Operating, LLC | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Oct 2025 |
| 928 | Krebbs, David B | | Oil & Gas Operator | Nov 2025 |
| 929 | Krehbiel Oil Co. | McPherson, KS 67460 | Oil & Gas Operator | Oct 1998 |
| 930 | Krehbiel Oil Com | | Oil & Gas Operator | Mar 1995 |
| 931 | Krehbiel, Brian | Burrton, KS 67020 | Gas Operator | Mar 2025 |
| 932 | Krehbiel, Jay | | Oil Operator | Sep 2025 |
| 933 | Krejci Harry L | | Oil & Gas Operator | Nov 2025 |
| 934 | Kremco Oil LLC | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 935 | Kremeier Prod & Operating | | Oil & Gas Operator | Jan 2010 |
| 936 | Krenek Enterprises, Inc. | Lovelady, TX 75851 | Oil Operator | Feb 2026 |
| 937 | Krennerman Oil & Gas Co., Inc. | Butler, PA 16001-0000 | Gas Operator | Dec 2015 |
| 938 | Krescent Energy Company, LLC | Houston, TX 77056 | Oil & Gas Operator | Apr 2013 |
| 939 | KRF Production Company LLC | Houston, TX 77269 | Oil & Gas Operator | Feb 2026 |
| 940 | Kriebel Acquisition Co LLC | Clarion, PA 16214-6161 | Oil & Gas Operator | Dec 2025 |
| 941 | Kriebel Gas Inc | Clarion, PA 16214-0765 | Oil & Gas Operator | Dec 1999 |
| 942 | Kriebel Minerals Inc | Clarion, PA 16214-6161 | Oil & Gas Operator | Dec 2020 |
| 943 | Kriebel Natural Gas Co LLC | Clarion, PA 16214-6161 | Oil & Gas Operator | Dec 2025 |
| 944 | Krier Kirby Oil | | Oil Operator | Dec 1996 |
| 945 | Krier Oil Oper - | | Oil Operator | Sep 1995 |
| 946 | Krier Oil Operation | | Oil Operator | Sep 2025 |
| 947 | Krier, Kirby Oil, Inc. | Claflin, KS 67525 | Oil Operator | Sep 2025 |
| 948 | Kriken Oil & Gas | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Jul 2005 |
| 949 | Kriken Oil & Gas, Inc. | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Feb 2026 |
| 950 | Krisco Oil Co. | Kermit, TX 79745 | Oil Operator | Jul 2022 |
| 951 | Kristen Oil And Gas, Inc. | Edna, TX 77957 | Oil & Gas Operator | Feb 2026 |
| 952 | Kriti Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Oct 2012 |
| 953 | Kriti Te Energy, Inc | Houston, TX 77079 | Oil & Gas Operator | Oct 2017 |
| 954 | Krocan Energy Corporation | Bowling Green, KY 42102 | Oil & Gas Operator | Feb 2026 |
| 955 | Krog Partners, LLC | Kilgore, TX 75663 | Oil Operator | Feb 2026 |
| 956 | Krog, Peter L. & Kim R. | Orchard Park, NY 14127 | Gas Operator | Dec 2024 |
| 957 | Kroh Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 958 | Kroll Energy LLC | New Matamoras, OH 45767 | Oil & Gas Operator | Dec 2024 |
| 959 | Krot Oil Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 960 | Krotje, Dorothy C. | Franklinville, NY 14737 | Gas Operator | Dec 2024 |
| 961 | Krotzer Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Dec 2025 |
| 962 | KRS Oil Company | Frisco, TX 75034 | Oil & Gas Operator | Apr 2020 |
| 963 | Kruckenberg & SC | | Oil & Gas Operator | Sep 1993 |
| 964 | Kruckenberg & Scott | Isabel, KS 67065 | Oil Operator | Dec 2011 |
| 965 | Krueger, A. H., Jr. | Hays, KS 67601 | Oil Operator | Jul 1993 |
| 966 | Krug, Donald H | Russell, KS 67665 | Oil Operator | Aug 2025 |
| 967 | Krumme Oil Company LLP | Bristow, OK 74010 | Oil & Gas Operator | Dec 2025 |
| 968 | Krumme Wesley J | Oklahoma City, OK 73120 | Oil & Gas Operator | Jun 1997 |
| 969 | Krummrich Engineering Corporation | | Oil & Gas Operator | Nov 2025 |
| 970 | Ksabe Energy Partners, LLC | Oklahoma City, OK 73106 | Oil Operator | Feb 2026 |
| 971 | KSC Oil | | Oil Operator | Aug 2025 |
| 972 | KSD, Inc. | | Oil & Gas Operator | May 2004 |
| 973 | KSM Energy Inc | Pittsburgh, PA 15238-3156 | Gas Operator | Dec 2024 |
| 974 | KST Oil & Gas Co Inc | Tallmadge, OH 44278-1142 | Oil & Gas Operator | Dec 1995 |
| 975 | Kstone Energy, LLC | Oklahoma City, OK 73106 | Oil Operator | Feb 2026 |
| 976 | KSW Operating,LLC | | Oil & Gas Operator | Mar 2015 |
| 977 | KT Energy Inc | Enid, OK 73702-2365 | Oil & Gas Operator | Nov 2025 |
| 978 | KT Investments Inc | Hennessey, OK 73742 | Oil & Gas Operator | Dec 2025 |
| 979 | KT Operating Company LLC | Dallas, TX 75231 | Oil & Gas Operator | Feb 2010 |
| 980 | KT Resources LLC | | Oil & Gas Operator | Dec 2025 |
| 981 | KTC Oil Enterprises, LLC | Dallas, TX 75247 | Oil & Gas Operator | Feb 2026 |
| 982 | KTM Operating LLC | | Oil & Gas Operator | Nov 2025 |
| 983 | KTP Energy, Inc. | Denver, CO 80226 | Oil & Gas Operator | Aug 2019 |
| 984 | Kudella, Ron & Cline, Russell | | Oil & Gas Operator | Feb 2021 |
| 985 | Kuehne Oil Company | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 986 | Kuenzler & Flora Reserve Company | | Oil & Gas Operator | Aug 2025 |
| 987 | Kughn | | Oil Operator | Sep 2019 |
| 988 | Kugler* Dean & Joe Dba D-J Oil Company | | Oil & Gas Operator | Sep 2019 |
| 989 | Kuhn Oil Co Inc | Timber Lake, SD 57656 | Oil Operator | Dec 2024 |
| 990 | Kuhn Richard F | Baltimore, OH 43105 | Oil Operator | Dec 2022 |
| 991 | Kuhn Walter Dril | | Gas Operator | Dec 1985 |
| 992 | Kukui Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 2002 |
| 993 | Kukui Operating Company | Ignacio, CO 81137 | Oil & Gas Operator | May 2013 |
| 994 | Kulka And Schmidt Inc | | Oil & Gas Operator | Dec 1992 |
| 995 | Kundtz Properties Inc | Orange VIllage, OH 44122 | Gas Operator | Dec 2024 |
| 996 | Kunkel, Richard A. DDS & Susan K. | Little Valley, NY 14755 | Gas Operator | Dec 2024 |
| 997 | Kunu Energy LLC | Wichita Falls, TX 76310 | Oil Operator | Feb 2026 |
| 998 | Kuran Resources | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 999 | Kuran Resources Inc | Wichita Falls, TX 76305 | Oil Operator | Jul 2021 |
| 1000 | Kutter Oil Co. | Eureka, KS 67045 | Oil Operator | May 2002 |