| 801 | Bull Ring Energy LLC | Oklahoma City, OK 73118 | Gas Operator | Jan 2026 |
| 802 | Bullard Bros Production Co Inc | Comanche, OK 73529-0637 | Oil Operator | Mar 2015 |
| 803 | Bullard Don W | Ardmore, OK 73401-3646 | Oil & Gas Operator | Dec 2019 |
| 804 | Bullard Oil Company LLC | Tuttle, OK 73089-8375 | Oil Operator | Jul 2025 |
| 805 | Bullards Oilfield Service Inc | Ardmore, OK 73401-3646 | Oil Operator | Sep 1999 |
| 806 | Bulldog Disposal Inc | Laverne, OK 73848 | Oil Operator | Apr 2014 |
| 807 | Bulldog Operating Company LLC | Shreveport, LA 71101-3680 | Oil & Gas Operator | Jun 2015 |
| 808 | Bulldog Production Inc | Seminole, OK 74868 | Oil Operator | Nov 2024 |
| 809 | Bullseye Operating LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Feb 2026 |
| 810 | Buntin Ronnie | Maramec, OK 74045-4500 | Oil & Gas Operator | Sep 2019 |
| 811 | Bunyard Jerry L | Stroud, OK 74079 | Oil & Gas Operator | Oct 2024 |
| 812 | Burchfield Margaret S Dba Nu-Hope Oil Company | Earlsboro, OK 74840 | Oil & Gas Operator | Jan 2026 |
| 813 | Burk George E | Mannford, OK 74044-0593 | Oil & Gas Operator | Oct 2015 |
| 814 | Burk Royalty Co., LTD. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2026 |
| 815 | Burkan Oil Company | Tulsa, OK 74137 | Oil & Gas Operator | Dec 1995 |
| 816 | Burkhart Petroleum Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2002 |
| 817 | Burlington Oil Company | Ponca City, OK 74602-1304 | Oil & Gas Operator | May 2007 |
| 818 | Burlington Resources Oil & Gas Company LP | Houston, TX 77252 | Oil & Gas Operator | May 2026 |
| 819 | Burnett Oil Co Inc | Fort Worth, TX 76102 | Oil & Gas Operator | May 2026 |
| 820 | Burns Eugene | Davis, OK 73030-3112 | Oil Operator | Mar 2006 |
| 821 | Burrows Alfred | Copan, OK 74022 | Oil & Gas Operator | May 2021 |
| 822 | Burrows, Dewey | | Oil & Gas Operator | Jan 2026 |
| 823 | Burt Esther M | Sperry, OK 74073 | Oil Operator | Dec 2025 |
| 824 | Burt James & Charles Maybee | Sperry, OK 74073-8001 | Oil & Gas Operator | Nov 2014 |
| 825 | Burton Oil Properties | Ratliff City, OK 73081 | Oil & Gas Operator | Jan 2026 |
| 826 | Busey Naman | Elmore City, OK 73433-9583 | Oil & Gas Operator | Nov 2025 |
| 827 | Butkin Oil Company | Duncan, OK 73534-2090 | Oil & Gas Operator | Sep 2021 |
| 828 | Butkin Oil Company LLC | Duncan, OK 73533 | Oil & Gas Operator | Mar 2023 |
| 829 | Butler & Haseloff | Vernon, TX 76384 | Oil Operator | Jul 1993 |
| 830 | Butler B F | Hobart, OK 73651 | Oil Operator | Apr 2014 |
| 831 | Butler Petroleum Corp | Norman, OK 73069-7111 | Oil & Gas Operator | Dec 1998 |
| 832 | Butler Petroleum LLC | Van Alstyne, TX 75495 | Oil Operator | May 2020 |
| 833 | Butler, Cecil D | | Oil & Gas Operator | Jan 2026 |
| 834 | Butte Oil And Gas Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | Feb 2026 |
| 835 | Buttes Resources Company | Houston, TX 77056 | Oil & Gas Operator | May 2007 |
| 836 | Buttonwood Petroleum Inc | Tulsa, OK 74136-4234 | Oil & Gas Operator | Jan 2014 |
| 837 | Buttram Energies Inc | Oklahoma City, OK 73112-7235 | Oil & Gas Operator | Nov 2021 |
| 838 | Buxton Energy LLC | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Apr 2014 |
| 839 | Buxton Fred M | Oklahoma City, OK 73116-9111 | Oil & Gas Operator | Feb 2007 |
| 840 | BVD Inc | Yates Center, KS 66783-0194 | Oil & Gas Operator | Feb 2026 |
| 841 | Bwab Incorporated | Denver, CO 80202 | Oil & Gas Operator | Aug 1996 |
| 842 | BWB Resources Inc | Colorado Springs, CO 80908-7204 | Oil & Gas Operator | Jan 2016 |
| 843 | Byars Bill Inc | Okmulgee, OK 74447-0850 | Oil & Gas Operator | Apr 2015 |
| 844 | Byng Energy Group Inc | Enid, OK 73703 | Oil & Gas Operator | May 2026 |
| 845 | Byng Operating LLC | Ada, OK 74820-0677 | Oil & Gas Operator | Feb 2026 |
| 846 | C & A Oil Company | Edmond, OK 73013-9413 | Oil & Gas Operator | Mar 2015 |
| 847 | C & B Energy Resources | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 848 | C & B Production | Ben Bolt, TX 78342 | Oil & Gas Operator | May 2026 |
| 849 | C & C Oil Co. | Borger, TX 79008 | Oil & Gas Operator | Jan 2026 |
| 850 | C & C Productions LLC | Muskogeee, OK 74402 | Oil & Gas Operator | Jan 2026 |
| 851 | C & C Tank Service LLC | | Oil & Gas Operator | Sep 2022 |
| 852 | C & C Tank Truck Service Inc | Holdenville, OK 74848 | Oil Operator | Feb 2012 |
| 853 | C & D Drilling Company | Hennepin, OK 73046 | Oil & Gas Operator | Mar 2007 |
| 854 | C & D Supply | Cherokee, OK 73728-5817 | Oil & Gas Operator | Jan 2026 |
| 855 | C & D Supply LLC | Cherokee, OK 73728-5817 | Oil & Gas Operator | Feb 2026 |
| 856 | C & G Energy Inc | | Oil & Gas Operator | Jun 1996 |
| 857 | C & H Oil Company | Ratliff City, OK 73481-0130 | Oil & Gas Operator | Apr 2015 |
| 858 | C & J Exploration LLC | Colorado Springs, CO 80920-3946 | Oil & Gas Operator | Oct 2022 |
| 859 | C & J Trucks LLC | Seminole, OK 74868-5406 | Oil & Gas Operator | Mar 2026 |
| 860 | C & L Drilling Company | Ada, OK 74821-1252 | Oil & Gas Operator | Jan 2014 |
| 861 | C & L Enterprise Of Wagoner | Coweta, OK 74429-9657 | Oil Operator | Mar 2001 |
| 862 | C & L Enterprises Inc | Lindsay, OK 73052 | Oil & Gas Operator | Feb 2026 |
| 863 | C & L Oil And Gas Corporation | Norman, OK 73069-8224 | Oil & Gas Operator | Feb 2026 |
| 864 | C & L Oil Company | Cross Plains, TX 76443 | Oil & Gas Operator | May 2026 |
| 865 | C & M Exploration LLC | Tulsa, OK 74159-1331 | Oil & Gas Operator | Jun 2014 |
| 866 | C & M Operating Company | Graham, TX 76450 | Oil & Gas Operator | Jan 2026 |
| 867 | C & R Petroleum Company | Duncan, OK 73533-1341 | Oil & Gas Operator | Jan 2026 |
| 868 | C & S Oil Company | Odessa, TX 79763 | Oil & Gas Operator | Nov 2019 |
| 869 | C & S Petroleum, Inc. | Norman, OK 73070 | Oil & Gas Operator | Dec 2024 |
| 870 | C & T Energy Co | Bartlesville, OK 74006 | Oil & Gas Operator | Nov 2004 |
| 871 | C & T Energy LLC | Morris, OK 74445-2667 | Oil & Gas Operator | Jan 2026 |
| 872 | C & W Oil Inc | | Oil & Gas Operator | Aug 2016 |
| 873 | C & W Operating LLC | Tulsa, OK 74145-7627 | Oil Operator | May 2020 |
| 874 | C & Y Casing Pulling Company | Duncan, OK 73533 | Oil & Gas Operator | Feb 2026 |
| 875 | C Bar C Resources LLC | Anadarko, OK 73005-3704 | Gas Operator | Jan 2026 |
| 876 | C Bar K Enterprises Inc | Oklahoma City, OK 73154-1828 | Oil & Gas Operator | Dec 2022 |
| 877 | C D Operating Company Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 878 | C E D LC | Enid, OK 73702-0326 | Oil & Gas Operator | Oct 2021 |
| 879 | C E Harmon Oil Inc | Tulsa, OK 74136-6559 | Oil & Gas Operator | Feb 2026 |
| 880 | C E L Inc | Bartlesville, OK 74006 | Oil & Gas Operator | Jan 2020 |
| 881 | C F & L Producing Co | | Oil & Gas Operator | Sep 2000 |
| 882 | C H E Company Inc | Shawnee, OK 74801 | Oil Operator | Feb 2012 |
| 883 | C L & S Oil Company Inc | Perry, OK 73077-0841 | Oil & Gas Operator | Jan 2018 |
| 884 | C L Conner | Humble, TX 77338 | Oil & Gas Operator | Oct 2025 |
| 885 | C N Operating Co | Drumright, OK 74030 | Oil & Gas Operator | Nov 1998 |
| 886 | C Rose Oil Co. | Midland, TX 79708 | Oil & Gas Operator | Feb 2026 |
| 887 | C-Water Disposal Inc | Oklahoma City, OK 73116-7326 | Oil Operator | Dec 2014 |
| 888 | C.J. Oil Company | Iowa Park, TX 76367 | Oil Operator | Jan 2025 |
| 889 | C5 Energy LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2019 |
| 890 | Cable W S | Cleveland, OK 74020 | Oil Operator | Jan 2021 |
| 891 | Cabot Exploration Corp | Houston, TX 77070 | Oil Operator | Jun 1999 |
| 892 | Cabot Oil & Gas Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2026 |
| 893 | Cabot Petroleum Corporation | Englewood, CO 80111-2529 | Oil & Gas Operator | Dec 2004 |
| 894 | Cactus Energy Company LLC | Hennessey, OK 73742 | Oil & Gas Operator | Feb 2026 |
| 895 | Cactus Oil & Gas LLC | Seminole, OK 74868-2430 | Oil & Gas Operator | Mar 2018 |
| 896 | Cactus Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Aug 2000 |
| 897 | Cactus Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Nov 2000 |
| 898 | Caddo Exploration, LLC | Norman, OK 73072 | Oil & Gas Operator | Feb 2026 |
| 899 | Caddo Oil & Gas Inc | Oklahoma City, OK 73157 | Oil & Gas Operator | Jan 1997 |
| 900 | Caddo-Marchand LC | Dallas, TX 75251-2202 | Oil & Gas Operator | Oct 2016 |