| 801 | Ko Operating LLC | Austin, TX 78746 | Oil Operator | Jun 2025 |
| 802 | Kobar Corporation | Riverton, WY 82501 | Gas Operator | Dec 1996 |
| 803 | Koby Oil Company LLC | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2025 |
| 804 | Kocana Resources | Ranchos Taos, NM 87557 | Oil & Gas Operator | Jul 1999 |
| 805 | Koch Exploration | | Oil & Gas Operator | Oct 1988 |
| 806 | Koch Exploration Company | Houston, TX 77046 | Oil & Gas Operator | Feb 2025 |
| 807 | Koch Exploration Company, LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2019 |
| 808 | Koch Gateway Pipeline Company | | Oil & Gas Operator | Feb 2001 |
| 809 | Koch Hydrocarbon Company | Wichita, KS 67220-3203 | Oil & Gas Operator | Nov 2014 |
| 810 | Koch Midstream Services Company | Wichita, KS 67201 | Oil & Gas Operator | Oct 2000 |
| 811 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 812 | Koch Production Company | Worland, WY 82401 | Oil & Gas Operator | Dec 2002 |
| 813 | Koch, P. S. | Seguin, TX 78155 | Oil & Gas Operator | May 2018 |
| 814 | Kocher And Westfall | Middlebourne, WV 26149 | Oil Operator | Dec 2021 |
| 815 | Koda Operating LLC | Tyler, TX 75703-5596 | Oil & Gas Operator | Feb 2025 |
| 816 | Koda Resources Operating, LLC | | Oil & Gas Operator | Apr 2025 |
| 817 | Kodiak Drilling, Inc. | Borger, TX 79008 | Oil & Gas Operator | Aug 2003 |
| 818 | Kodiak Energy LLC | Pineville, MO 64856 | Oil Operator | Dec 2019 |
| 819 | Kodiak Oil & Gas (USA) Inc. | Denver, CO 80202 | Oil & Gas Operator | Sep 2020 |
| 820 | Kodiak Oil & Gas Exploration Inc | Oklahoma City, OK 73134-1046 | Oil & Gas Operator | Feb 2025 |
| 821 | Kodiak Oil & Gas Inc | Muenster, TX 76252 | Oil & Gas Operator | Jun 2025 |
| 822 | Kodiak Oil Co. | Stockton, MO 65785 | Oil Operator | May 1996 |
| 823 | Kodiak Operating, L.L.C. | Olney, TX 76374 | Oil & Gas Operator | Jun 2025 |
| 824 | Kodiak Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 1996 |
| 825 | Kodiak Petroleum, Inc. | Englewood, CO 80155 | Oil & Gas Operator | Feb 2025 |
| 826 | Kodiak Productions LTD | Big Lake, TX 76932 | Oil & Gas Operator | Mar 2014 |
| 827 | Kody Petroleum Co., Inc. | Daisetta, TX 77533 | Oil & Gas Operator | Jun 2025 |
| 828 | Koebley Timothy W | Warren, PA 16365-2102 | Oil & Gas Operator | Dec 2024 |
| 829 | Koehler Rose Dba R & H Production | Cement, OK 73017 | Oil & Gas Operator | Oct 2021 |
| 830 | Koehn Alfred D | | Oil & Gas Operator | Sep 1994 |
| 831 | Koehn Eldon R | | Oil Operator | Dec 2009 |
| 832 | Koehn Radell W | | Oil Operator | Dec 2009 |
| 833 | Koehn, Alfred D.(Deceased) | Galva, KS 67443 | Oil Operator | Mar 1998 |
| 834 | Koehn, Carolyn | Galva, KS 67443 | Oil Operator | Feb 2025 |
| 835 | Koehn, John W. | Sublette, KS 67877 | Gas Operator | May 2018 |
| 836 | Koehn, Max R. | Copeland, KS 67837 | Oil & Gas Operator | Oct 2019 |
| 837 | Koehn, Radell W. And Austin Koehn & Morgan Koehn | Galva, KS 67443 | Oil Operator | Feb 2025 |
| 838 | Koehn, Roger D. | Galva, KS 67443 | Oil Operator | Apr 1998 |
| 839 | Koelsch Rex Or Marie | Tulsa, OK 74107-8647 | Oil & Gas Operator | Jul 2024 |
| 840 | Kohler Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 1994 |
| 841 | Kohler Industrial Nat. Gas, Inc. | Kohler, WI 53044 | Gas Operator | Dec 2000 |
| 842 | Kojo Energy, Inc. | Odessa, TX 79760 | Oil & Gas Operator | Jun 2025 |
| 843 | Koko Skadi, LLC | Austin, TX 78731 | Oil & Gas Operator | Jun 2025 |
| 844 | Kokomo Energy, Inc. | Gorman, TX 76454 | Oil & Gas Operator | Jun 2025 |
| 845 | Kokomo Oil Company | Houston, TX 77227 | Oil & Gas Operator | Apr 1998 |
| 846 | Kolar Petroleum Inc | Oklahoma City, OK 73162-1509 | Oil & Gas Operator | Jun 2007 |
| 847 | Kolb, James | Aspermont, TX 79502 | Oil & Gas Operator | Jul 2003 |
| 848 | Kolibri Energy Us, Inc. | Thousand Oaks, CA 91320-1272 | Oil & Gas Operator | Feb 2025 |
| 849 | Kollao Properties LLC | Midland, TX 79702 | Oil & Gas Operator | Jun 2025 |
| 850 | Kolodczak, Debra | North Collins, NY 14111 | Gas Operator | Dec 2023 |
| 851 | Konantz, Inc. | | Oil & Gas Operator | Jan 1995 |
| 852 | Konantz, Ronald J. Inc. | Houma, LA 70360 | Oil & Gas Operator | Jun 2025 |
| 853 | Koonce Oil Company | Iowa Park, TX 76367 | Oil & Gas Operator | Oct 1993 |
| 854 | Koontz Oil Company | Nocona, TX 76255 | Oil Operator | Aug 2022 |
| 855 | Kop-Mor Producti | | Oil Operator | Sep 1992 |
| 856 | Kopco, Inc. | Caney, KS 67333 | Oil & Gas Operator | Mar 2025 |
| 857 | Koram Operating LLC | Houston, TX 77079 | Oil & Gas Operator | Dec 2006 |
| 858 | Kore Energy LLC | | Oil & Gas Operator | Mar 2025 |
| 859 | Korman Exploration, Inc. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2001 |
| 860 | Kornblit, Majir | | Oil Operator | Nov 1998 |
| 861 | Kornye-Tillman Company | Cleburne, TX 76031 | Oil & Gas Operator | Jun 2025 |
| 862 | Koron Investments, Inc. | Hays, KS 67601 | Oil Operator | Feb 2025 |
| 863 | Kosarek, Charlie | San Antonio, TX 78213 | Oil & Gas Operator | Oct 2006 |
| 864 | Kot, Inc. | Lost Springs, KS 66859 | Oil Operator | Aug 2016 |
| 865 | Kotlowski, Keith | Alden, NY 14004 | Oil & Gas Operator | Dec 2023 |
| 866 | Kottwitz Oil Co., A General Partnership | | Oil Operator | Jul 2019 |
| 867 | Kouatli, Aiman M. | Caldwell, TX 77836 | Oil & Gas Operator | Jun 2025 |
| 868 | Kouplen Steve | Beggs, OK 74421 | Oil & Gas Operator | Oct 2024 |
| 869 | Kovar Operating, LLC | Victoria, TX 77901 | Oil & Gas Operator | Sep 2021 |
| 870 | Koven Production Co. | San Antonio, TX 78232 | Oil & Gas Operator | Aug 2003 |
| 871 | Koyl Oil Inc | | Oil & Gas Operator | Apr 2025 |
| 872 | Kozaczka, Loretta M. | Gowanda, NY 14070 | Gas Operator | Dec 2023 |
| 873 | KP Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 1997 |
| 874 | KP Oil, LLC | | Oil Operator | Jan 2025 |
| 875 | KPL Production Company LLC | Oklahoma City, OK 73112-4709 | Oil & Gas Operator | Feb 2017 |
| 876 | KPR Incorporated | | Oil & Gas Operator | Nov 1988 |
| 877 | Kracken Operating LLC | Lawrence, KS 66047 | Oil Operator | Dec 2019 |
| 878 | Kraemer II LLC | | Oil & Gas Operator | Dec 2000 |
| 879 | Kraft Oil Compan | | Oil Operator | Nov 1994 |
| 880 | Kraft Oil Company LLC | Gridley, KS 66852 | Oil Operator | Feb 2025 |
| 881 | Kraft, Jim - Oil Operations | Holyrood, KS 67450 | Oil Operator | Jan 1999 |
| 882 | Kraft, R L | | Oil Operator | Dec 2023 |
| 883 | Kraken Development III, LLC | | Oil & Gas Operator | Nov 2021 |
| 884 | Kraken Operating, LLC | Houston, TX 77024 | Oil & Gas Operator | Apr 2025 |
| 885 | Kraker & Martin Energy, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Apr 2011 |
| 886 | Kraker Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 1995 |
| 887 | Krakrow, Inc. | Spencer, WV 25276-1007 | Oil & Gas Operator | Dec 2021 |
| 888 | Kram Energy | Corpus Chrsti, TX 78404 | Oil & Gas Operator | Jun 2025 |
| 889 | Kramer Exploration Co. | Delaware, OH 43015 | Oil & Gas Operator | Dec 2009 |
| 890 | Kramer Oil Field Service Inc | Wellsville, KS 66092 | Oil Operator | May 2019 |
| 891 | Kramer Operating, LLC | Graham, TX 76450 | Oil & Gas Operator | Jun 2025 |
| 892 | Kramer, Clifford A. | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 1997 |
| 893 | Kramer, Frank & Ethel FLP | Graham, TX 76450 | Oil & Gas Operator | Sep 2014 |
| 894 | Kramer, Frank C. | Graham, TX 76450 | Oil & Gas Operator | Apr 2004 |
| 895 | Kranz, Thomas | East Aurora, NY 14052 | Gas Operator | Dec 2023 |
| 896 | Kratos Operating, LLC | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2025 |
| 897 | Kratzer Oil LLC | | Oil Operator | Jan 2025 |
| 898 | Krause, Michael J. & Tracy A. | Orchard Park, NY 14127 | Gas Operator | Dec 2023 |
| 899 | KRB Enterprise, Inc. | | Oil Operator | Apr 2025 |
| 900 | KRC Operating, LLC | Corpus Chrsti, TX 78412 | Oil & Gas Operator | Jun 2025 |