| 901 | Union Oil Co Of California | Midland, TX 79706 | Oil & Gas Operator | Jan 2022 |
| 902 | Unit Petroleum Company | Tulsa, OK 74170 | Oil & Gas Operator | Dec 2024 |
| 903 | United Energy & Expl Inc | Ada, OK 74821-2449 | Oil & Gas Operator | Sep 2024 |
| 904 | United Energy & Exploration LLC | Ada, OK 74821 | Oil & Gas Operator | Oct 2024 |
| 905 | United Production Company LLC | Edmond, OK 73003 | Oil & Gas Operator | Oct 2024 |
| 906 | United States Gypsum Co | Oakfield, NY 14125 | Oil & Gas Operator | Dec 2023 |
| 907 | United States Trading & Trans | Dallas, TX 75380-3342 | Oil & Gas Operator | Dec 1994 |
| 908 | Urban Oil & Gas Group, LLC | Plano, TX 75074 | Oil & Gas Operator | Dec 2024 |
| 909 | Valence Operating Company | Kingwood, TX 77339 | Oil & Gas Operator | Dec 2024 |
| 910 | Valero Marketing & Supply Co | San Antonio, TX 78269-6000 | Oil & Gas Operator | Sep 2023 |
| 911 | Valley Petrol Consulting Inc | Denton, TX 76205 | Oil Operator | Sep 2024 |
| 912 | Vastar Resources Inc | Houston, TX 77253 | Oil & Gas Operator | Aug 2024 |
| 913 | Vaughan Otto M | | Oil & Gas Operator | Apr 2014 |
| 914 | Veenker Resources, Inc. | Oklahoma City, OK 73113 | Oil & Gas Operator | Oct 2024 |
| 915 | Ventana Exploration And Production II LLC | Oklahoma City, OK 73134-2519 | Oil & Gas Operator | Sep 2024 |
| 916 | Verdad Oil & Gas Corporation | Dallas, TX 75235 | Oil & Gas Operator | Dec 2024 |
| 917 | Vintage Marketing Inc | Tulsa, OK 74172 | Oil & Gas Operator | Apr 2003 |
| 918 | Vintage Petroleum, Inc. | Houston, TX 77046 | Oil & Gas Operator | Sep 2024 |
| 919 | Vistatex Energy LLC | Houston, TX 77057 | Oil & Gas Operator | Oct 2024 |
| 920 | Vitol Inc | Houston, TX 77002 | Oil & Gas Operator | Sep 2023 |
| 921 | Vitruvian II Woodford LLC | The Woodlands, TX 77381-5259 | Oil & Gas Operator | May 2019 |
| 922 | VPR Operating LLC | Austin, TX 78746 | Oil & Gas Operator | Oct 2013 |
| 923 | W C T Operating LLC | Oklahoma City, OK 73134 | Oil & Gas Operator | Oct 2024 |
| 924 | W-N Energy Corp | Tulsa, OK 74121-1468 | Oil & Gas Operator | Nov 1994 |
| 925 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2024 |
| 926 | Walden E F | Ada, OK 74820 | Oil & Gas Operator | Aug 2014 |
| 927 | Walker Keith F | Ardmore, OK 73401 | Oil & Gas Operator | Jan 2019 |
| 928 | Walker R J Oil Co Inc | | Oil & Gas Operator | May 2003 |
| 929 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Dec 2024 |
| 930 | Walsh Jr F Howard | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Sep 2024 |
| 931 | Walsh Jr F Howard Opr Co Inc | Fort Worth, TX 76102-4773 | Oil & Gas Operator | Feb 2016 |
| 932 | Walters Frank | Pernell, OK 73076 | Oil & Gas Operator | Sep 2014 |
| 933 | Walters Oil Company | Elmore City, OK 73433-9505 | Oil & Gas Operator | Sep 2024 |
| 934 | Walters Oil LLC | Elmore City, OK 73433-8637 | Oil Operator | Apr 2020 |
| 935 | Ward Petroleum Corporation | Enid, OK 73702 | Oil & Gas Operator | Sep 2024 |
| 936 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Dec 2024 |
| 937 | Warwick Associates LC | Oklahoma City, OK 73112 | Oil & Gas Operator | Oct 2024 |
| 938 | Warwick-Jupiter LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Sep 2024 |
| 939 | Washita Energy Inc | Pauls Valley, OK 73075-0923 | Oil & Gas Operator | Mar 2015 |
| 940 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Dec 2024 |
| 941 | Webb John L Estate A Partner | Wichita Falls, TX 76302 | Oil Operator | May 2008 |
| 942 | Webb Roy C | Davis, OK 73030 | Oil & Gas Operator | Sep 2024 |
| 943 | Webber Wesley | Davis, OK 73030 | Oil & Gas Operator | Oct 2009 |
| 944 | Weimer & Fitzhugh | Tulsa, OK 74103-4102 | Oil & Gas Operator | Dec 1993 |
| 945 | Welch Family Trust | Ada, OK 74820-9643 | Oil & Gas Operator | Apr 2015 |
| 946 | Wellco Energy Inc | Harrah, OK 73045 | Oil & Gas Operator | Sep 2024 |
| 947 | Wellco Production LLC | Purcell, OK 73080-6833 | Oil & Gas Operator | Sep 2024 |
| 948 | Wenexco, Inc. | Streetman, TX 75859 | Oil & Gas Operator | Dec 2024 |
| 949 | Wessely Energy Company | Dallas, TX 75206 | Oil & Gas Operator | May 2001 |
| 950 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 2024 |
| 951 | Wheeler Richard Jr | Oklahoma City, OK 73112-8857 | Oil & Gas Operator | Mar 2005 |
| 952 | Whitaker Energy Inc | Humble, TX 77346-1798 | Oil & Gas Operator | Jul 2024 |
| 953 | Whitaker Raymond | Paul Valley, OK 73075-1041 | Oil & Gas Operator | May 2007 |
| 954 | Whitco Operating Company | Duncan, OK 73534-1936 | Oil & Gas Operator | Oct 2009 |
| 955 | White Wolf Energy LLC | Richardson, TX 75080-5509 | Oil & Gas Operator | Oct 2022 |
| 956 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Dec 2024 |
| 957 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Sep 2024 |
| 958 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 959 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 960 | Wil-Mar Operations | Duncan, OK 73534-1566 | Oil & Gas Operator | Oct 2016 |
| 961 | Wil-MC Oil Corporation The | Irving, TX 75015-2510 | Oil & Gas Operator | Mar 1999 |
| 962 | Wildhorse Oil & Gas Corporation | Ardmore, OK 73402 | Oil & Gas Operator | May 2019 |
| 963 | Wildhorse Operating Company | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2024 |
| 964 | Wilkins L L E & O Company | Shawnee, OK 74801 | Oil & Gas Operator | Aug 2018 |
| 965 | Williams Reid Oil Co | Dallas, TX 75234 | Oil & Gas Operator | Sep 2024 |
| 966 | Wise Oil & Gas Company LLC | Shawnee, OK 74801-8507 | Oil & Gas Operator | Feb 2024 |
| 967 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Oct 2024 |
| 968 | WM Energy LLC | Asher, OK 74826 | Oil & Gas Operator | Sep 2024 |
| 969 | Wolf Howard Lee | Burneyville, OK 73430-9617 | Oil & Gas Operator | Jun 2000 |
| 970 | Wolverine Exploration Company | Houston, TX 77002 | Oil & Gas Operator | May 2019 |
| 971 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 972 | WR Oil & Gas LLC | Plano, TX 75024-3523 | Oil & Gas Operator | Sep 2024 |
| 973 | Wynn-Crosby Operating LP | Dallas, TX 75201 | Oil & Gas Operator | Sep 2024 |
| 974 | Xae Corporation | Norman, OK 73072 | Oil & Gas Operator | Apr 2021 |
| 975 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 976 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Dec 2024 |
| 977 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Oct 2024 |
| 978 | Zeiders Bros Oil & Gas Co LLC | Edmond, OK 73003 | Oil & Gas Operator | Sep 2024 |
| 979 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Oct 2024 |
| 980 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |