| 901 | Whiteman Industries Inc | Oklahoma City, OK 73101 | Oil & Gas Operator | May 2025 |
| 902 | Whitemound Oil Company | FT Stockton, TX 79735 | Oil & Gas Operator | Jan 2017 |
| 903 | Whitesands Operating, L.L.C. | Corpus Chrsti, TX 78466 | Oil & Gas Operator | Mar 2025 |
| 904 | Whitesands Resources, L.L.C. | Corpus Chrsti, TX 78466 | Oil Operator | Jun 2019 |
| 905 | Whitesell, Michael & Darleen | Wellsville, NY 14895 | Oil & Gas Operator | Dec 2024 |
| 906 | Whiteside, H. W. | Abilene, TX 79604 | Oil & Gas Operator | Nov 1998 |
| 907 | Whiteside, Robert | Comanche, TX 76442 | Oil & Gas Operator | May 1998 |
| 908 | Whitestone Corp | | Oil & Gas Operator | Dec 2018 |
| 909 | Whitestone Petroleum Corp | Edmond, OK 73083-7914 | Oil & Gas Operator | May 2015 |
| 910 | Whitetail Crude | | Oil Operator | Nov 1996 |
| 911 | Whitetail Crude Inc | Ness City, KS 67560 | Oil & Gas Operator | Sep 2025 |
| 912 | Whitetail Operators LLC | | Oil Operator | Nov 2021 |
| 913 | Whitewing & Whitewing Oil LLC | | Oil & Gas Operator | May 2004 |
| 914 | Whitfield Energy | Midland, TX 79702 | Oil & Gas Operator | Jan 1999 |
| 915 | Whiting Door Manufacturing Corp. | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 916 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 917 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 918 | Whiting Well Partnership | Akron, NY 14001 | Gas Operator | Dec 2024 |
| 919 | Whitley Oil & Gas Inc | Owasso, OK 74055 | Oil & Gas Operator | Jun 2009 |
| 920 | Whitley Robert L | Saint Louis, OK 74866-0004 | Oil & Gas Operator | Sep 2014 |
| 921 | Whitley, William W | Denver, CO 80209 | Oil & Gas Operator | Dec 1983 |
| 922 | Whitlock, J.R. Operator | Amarillo, TX 79105 | Gas Operator | Jul 1997 |
| 923 | Whitlow Energy, Inc. | Spring Hill, KS 66083 | Oil & Gas Operator | Sep 2025 |
| 924 | Whitman-Dome Energy Corporation | San Diego, CA 92101 | Oil & Gas Operator | Nov 1996 |
| 925 | Whitmar Exploration Company | Denver, CO 80202 | Oil & Gas Operator | Nov 2025 |
| 926 | Whitmar Natural Resources Co | Tulsa, OK 74136-9998 | Oil & Gas Operator | Jun 2004 |
| 927 | Whitmar Operating Company | Tulsa, OK 74103-3515 | Oil & Gas Operator | Apr 2009 |
| 928 | Whitmer Carl W | | Oil & Gas Operator | Sep 1984 |
| 929 | Whitnam Oil & Gas Corp. | Glenville, WV 26351 | Oil & Gas Operator | Dec 2009 |
| 930 | Whitney Oil & Gas Co, LLC | | Oil & Gas Operator | Dec 2017 |
| 931 | Whitney Oil & Gas, LLC | | Oil & Gas Operator | Jan 2025 |
| 932 | Whitney Oil And Gas Corp | | Oil & Gas Operator | Oct 1988 |
| 933 | Whitney Thomas C | Danville, OH 43014 | Oil & Gas Operator | Dec 2024 |
| 934 | Whitney, Ben | Clymer, NY 14724 | Gas Operator | Dec 2024 |
| 935 | Whitson, James A., Jr. | Houston, TX 77063 | Oil & Gas Operator | Nov 2011 |
| 936 | Whitt Investments, Inc. | Graham, TX 76450 | Oil Operator | Dec 2019 |
| 937 | Whitt Oil & Gas, Inc. | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 938 | Whitt, W. J. | Albany, TX 76430 | Oil & Gas Operator | Nov 1996 |
| 939 | Whitten Energy Corp. | Houston, TX 77090 | Oil & Gas Operator | Feb 2026 |
| 940 | Whittier Energy Company | Farmington, NM 87499 | Gas Operator | Nov 2002 |
| 941 | Whittier Operating Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2007 |
| 942 | Whittington Curtis | Stonewall, OK 74871-0482 | Oil & Gas Operator | Feb 2011 |
| 943 | Whittington Energy Co. | Melbourne, FL 32901 | Oil & Gas Operator | Feb 2026 |
| 944 | Whittington Operating Company | Houston, TX 77069 | Oil & Gas Operator | Feb 2026 |
| 945 | Whittington, G. R. | Amarillo, TX 79109 | Oil & Gas Operator | Jan 1994 |
| 946 | Whittington, G. R. Estate | Amarillo, TX 79109 | Oil & Gas Operator | Mar 2008 |
| 947 | Whittington, James C., Inc. | Dallas, TX 75214 | Oil & Gas Operator | Jan 2017 |
| 948 | Whitton Company, Inc. | | Oil & Gas Operator | Jul 2020 |
| 949 | WHK, Inc. | | Oil & Gas Operator | Oct 1993 |
| 950 | WHL Oil Corp. | Houston, TX 77227 | Oil & Gas Operator | Sep 1998 |
| 951 | Whomble O O | Morris, OK 74445 | Oil Operator | Jun 2021 |
| 952 | Whoolery, Ronald J Dba H & R Block | | Oil & Gas Operator | Dec 2019 |
| 953 | WHR Corporation | | Oil & Gas Operator | Jul 2014 |
| 954 | Wible Limited Liability Co | Edmond, OK 73012 | Oil Operator | Oct 2024 |
| 955 | Wichita Falls Oil Expl. Co. | Holliday, TX 76366 | Oil & Gas Operator | Feb 2026 |
| 956 | Wichita Industri | | Oil Operator | Nov 1987 |
| 957 | Wichita Operating Company, Inc. | Spring, TX 77393 | Oil & Gas Operator | May 2009 |
| 958 | Wichita River Oil Corporation | Englewood, CO 80111 | Oil & Gas Operator | Apr 2009 |
| 959 | Wick'S Petroleum | | Oil Operator | Aug 1983 |
| 960 | Wicker Oil Co | | Oil & Gas Operator | Feb 1992 |
| 961 | Wicker, La. Cent. & Clovelly | | Gas Operator | Jul 1983 |
| 962 | Wickham, R. R. | | Oil Operator | Jan 1980 |
| 963 | Wicklund Enterprises Inc | | Oil Operator | Dec 2024 |
| 964 | Wicklund Petroleum Corporation | Naples, FL 34108-0108 | Oil & Gas Operator | Dec 2019 |
| 965 | Widener, A.C. Farms, Inc. | Hudson, KS 67545 | Oil Operator | Dec 2009 |
| 966 | Widrig Donald N | | Oil Operator | May 1988 |
| 967 | Widrig Oil LLC | Leawood, KS 66209 | Oil Operator | Sep 2025 |
| 968 | Widrig, Don | Leawood, KS 66209 | Oil Operator | Jul 2008 |
| 969 | Wieck Oil Company LLC | Cromwell, OK 74859 | Oil Operator | Aug 2014 |
| 970 | Wiedemann K T TR | | Oil Operator | Jul 1992 |
| 971 | Wiepking-Fullerton Energy LLC | | Oil & Gas Operator | Oct 2025 |
| 972 | Wieser Oil LLC | | Oil & Gas Operator | Dec 2024 |
| 973 | Wiesner, Roman L. | Ellis, KS 67637 | Oil Operator | Dec 1993 |
| 974 | Wiesner, Tom Oil Operations | Hays, KS 67601 | Gas Operator | Sep 2025 |
| 975 | Wigington, James Robert | Ackerly, TX 79713 | Oil & Gas Operator | Aug 2003 |
| 976 | Wigner, David H Jr | Franklin, KY 42134 | Oil Operator | Dec 2023 |
| 977 | Wikel, David W | | Oil Operator | Nov 2025 |
| 978 | Wil-Max Co. | Kingman, KS 67068 | Oil Operator | Jul 2001 |
| 979 | Wil-MC Oil Corporation The | Irving, TX 75015-2510 | Oil & Gas Operator | Mar 1999 |
| 980 | Wil-Ron Inc | Lucien, OK 73757-9710 | Oil & Gas Operator | Oct 2025 |
| 981 | Wilbanks Energy Corporation | Houston, TX 77036 | Oil & Gas Operator | Dec 2001 |
| 982 | Wilbanks Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 983 | Wilbanks Reserve Corporation | Denver, CO 80203 | Oil & Gas Operator | Feb 2026 |
| 984 | Wilbanks, Bruce & G.L. | Midland, TX 79702 | Oil & Gas Operator | Aug 1996 |
| 985 | Wilbanks, Bruce A. | Midland, TX 79701 | Oil & Gas Operator | Aug 1996 |
| 986 | Wilbanks, Bruce A. Company | Midland, TX 79702 | Oil & Gas Operator | Feb 2026 |
| 987 | Wilbrook Exploration, Inc. | Lingleville, TX 76461 | Oil & Gas Operator | Aug 2003 |
| 988 | Wilburn Wolfe L | Erie, PA 16506-5039 | Gas Operator | Dec 2000 |
| 989 | Wilchar, DR. R. B. | Fort Worth, TX 76185 | Oil & Gas Operator | Jan 2007 |
| 990 | Wilco Oil & Gas Corporation | Oklahoma City, OK 73159-6229 | Oil & Gas Operator | Dec 2023 |
| 991 | Wilco Oil Gas & Expl. Corp. | | Oil & Gas Operator | Mar 1979 |
| 992 | Wilco Operating | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 993 | Wilco Properties, Inc. | Dallas, TX 75205 | Oil & Gas Operator | Jan 2004 |
| 994 | Wilco-Placentia Oil Operator LLC | | Oil & Gas Operator | Dec 2025 |
| 995 | Wilcobill Corporation | | Oil Operator | Dec 1986 |
| 996 | Wilcox Energy Company | | Oil & Gas Operator | Dec 2025 |
| 997 | Wilcox Energy Company LLC | Rule, TX 79547 | Oil & Gas Operator | Feb 2026 |
| 998 | Wilcox Oil Company | Rule, TX 79547 | Oil & Gas Operator | Aug 2008 |
| 999 | Wilcox Oil, LLC | Wichita, KS 67235 | Oil Operator | Dec 2019 |
| 1000 | Wilcox Operating Company | | Oil Operator | Dec 1989 |