| 701 | Westlake Energy Consultants Corp | Thousand Oaks, CA 91362 | Oil & Gas Operator | Aug 2003 |
| 702 | Westlake Energy Consultants, Inc. | Westlake VIllage, CA 91362 | Gas Operator | Dec 2019 |
| 703 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 704 | Westlands Resources Corporation | Monrovia, CA 91016 | Oil & Gas Operator | Apr 2025 |
| 705 | Westmore Drillin | | Oil & Gas Operator | Oct 1995 |
| 706 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 707 | Westmoreland Gas, LLC | | Oil & Gas Operator | Dec 2021 |
| 708 | Westoil LLC | Austin, TX 78747 | Oil & Gas Operator | Apr 2025 |
| 709 | Weston Management & Operations Group | Centreville, MD 21617 | Oil Operator | May 1997 |
| 710 | Westover Production Co., LLC | Kermit, TX 79745 | Oil & Gas Operator | Apr 2025 |
| 711 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | Apr 2025 |
| 712 | Westphal Oil & Gas Inc | Fort Smith, AR 72901-2199 | Oil & Gas Operator | Feb 2015 |
| 713 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 714 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 715 | Westport Oil Com | | Oil Operator | Feb 1994 |
| 716 | Westport Petrole | | Oil Operator | Feb 1985 |
| 717 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2025 |
| 718 | Westshore Operating Inc | Naples, FL 34109-0549 | Oil & Gas Operator | Dec 2011 |
| 719 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 720 | Westside Farming Co. Inc. | | Gas Operator | Dec 1995 |
| 721 | Westside Wells Inc | Altus, OK 73521 | Oil & Gas Operator | Nov 2020 |
| 722 | Weststar Exploration Co | Houston, TX 77027 | Oil & Gas Operator | Mar 2021 |
| 723 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 724 | Weststar Operating Company | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2015 |
| 725 | Weststar Resourc | | Oil Operator | Sep 1992 |
| 726 | Westwin Energy I, LP | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 727 | Westwind Exploration Company | Oklahoma City, OK 73123 | Oil & Gas Operator | Oct 1998 |
| 728 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 729 | Wetwick DRLG. & Prod. | Carlsbad, TX 76934 | Oil Operator | Apr 2025 |
| 730 | Wetzel Oil Company | Austin, TX 78738 | Oil & Gas Operator | May 2007 |
| 731 | Wetzel Producing Company | Duncan, OK 73533-4602 | Oil & Gas Operator | Feb 2025 |
| 732 | Weva Oil Corp. | | Oil & Gas Operator | Nov 2019 |
| 733 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | Feb 2025 |
| 734 | Wexpro Development Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Feb 2025 |
| 735 | Wexpro II Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Feb 2025 |
| 736 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 737 | WF Company, LTD. | Midland, TX 79705 | Oil & Gas Operator | Oct 1995 |
| 738 | WF Operating LLC | Bartlesville, OK 74003 | Oil Operator | May 2023 |
| 739 | WFD Oil Corporation | Edmond, OK 73012-0619 | Oil & Gas Operator | Jan 2025 |
| 740 | WFMMS, Inc. | Batson, TX 77519 | Oil & Gas Operator | Apr 2025 |
| 741 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2025 |
| 742 | WG Oil & Gas LLC | Okmulgee, OK 74447-7862 | Oil & Gas Operator | Dec 2022 |
| 743 | WG Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Apr 2025 |
| 744 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |
| 745 | WGM Gas Co Inc | Creekside, PA 15732-8500 | Oil & Gas Operator | Dec 2024 |
| 746 | Wgo Resources, LLC | | Oil & Gas Operator | Jan 2025 |
| 747 | WGP-KHC, LLC | Houston, TX 77002 | Oil Operator | May 2017 |
| 748 | WGR, Inc. | Houston, TX 77046 | Gas Operator | Jul 2007 |
| 749 | Wgsi Enterprise LLC | Carrizo SPGS, TX 78834 | Gas Operator | Apr 2025 |
| 750 | Wharton Oil Co. | Vernon, TX 76384 | Oil & Gas Operator | Dec 2000 |
| 751 | Whatley, O. B. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 1993 |
| 752 | Whatley, O.B. Oil Company, Inc. | Bivins, TX 75555 | Oil & Gas Operator | Apr 2025 |
| 753 | WHC Oper LLC | Commodore, PA 15729-9109 | Gas Operator | Dec 2023 |
| 754 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 755 | Wheatbelt Invest | | Oil Operator | Mar 1991 |
| 756 | Wheatland Oil & | | Oil & Gas Operator | Aug 1984 |
| 757 | Wheatland Oil Inc | Enid, OK 73702-1032 | Oil & Gas Operator | Mar 2015 |
| 758 | Wheeler & Hanlin MFG Co Inc | Tulsa, OK 74148 | Oil Operator | Jun 1998 |
| 759 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Jan 2025 |
| 760 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Apr 2025 |
| 761 | Wheeler Michael D | Newark, OH 43055 | Oil & Gas Operator | Dec 2023 |
| 762 | Wheeler Midstream LLC | Houston, TX 77002 | Oil & Gas Operator | May 2018 |
| 763 | Wheeler Oil & Gas Inc | Tulsa, OK 74103-4293 | Oil & Gas Operator | Jan 2007 |
| 764 | Wheeler Oil Co. (A) | Amarillo, TX 79114 | Gas Operator | Apr 2001 |
| 765 | Wheeler Oil Company | Sperry, OK 74073-9417 | Oil & Gas Operator | Dec 2024 |
| 766 | Wheeler Oil, LTD | Isonville, KY 41149 | Oil & Gas Operator | Dec 2023 |
| 767 | Wheeler Operating Corporation | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2025 |
| 768 | Wheeler Richard Jr | Oklahoma City, OK 73112-8857 | Oil & Gas Operator | Mar 2005 |
| 769 | Whelan Brothers, Inc. | Oil City, LA 71061 | Oil & Gas Operator | May 2015 |
| 770 | Wheless Drilling Company | | Oil & Gas Operator | Dec 1989 |
| 771 | Wheless Drilling Company Et Al | | Oil & Gas Operator | Dec 1989 |
| 772 | Wheless DRLG Co &R.M.Bergstein | | Oil Operator | May 1986 |
| 773 | Wheless Industries, Inc. | Shreveport, LA 71101-5301 | Oil & Gas Operator | Sep 2002 |
| 774 | Wheless Industries-Pelto Oil | | Oil & Gas Operator | Dec 1989 |
| 775 | Whidbey Resources Inc | Hudson, OH 44236 | Oil & Gas Operator | Dec 2016 |
| 776 | Whilton Brooks A | Warren, PA 16365-8410 | Oil & Gas Operator | Dec 2024 |
| 777 | Whipple Run Oil & Gas Co | Grantsville, WV 26147 | Oil & Gas Operator | Dec 2006 |
| 778 | Whiskey Bay Oil Company | | Oil & Gas Operator | May 1990 |
| 779 | Whiskey River Oil & Gas LLC | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 780 | Whisler Enterprise Company | Erie, CO 80516 | Oil & Gas Operator | Feb 2025 |
| 781 | Whitacre Enterprises Inc | Graysville, OH 45734 | Oil & Gas Operator | Dec 2021 |
| 782 | Whitaker Companies, Inc. | Humboldt, KS 66748 | Oil & Gas Operator | Aug 2023 |
| 783 | Whitaker Energy Inc | Humble, TX 77346-1798 | Oil & Gas Operator | Jan 2025 |
| 784 | Whitaker Enterpr | | Oil Operator | Oct 1992 |
| 785 | Whitaker Harold | | Oil Operator | Aug 1990 |
| 786 | Whitaker Properties, L. P. | Carthage, TX 75633 | Oil & Gas Operator | Sep 1997 |
| 787 | Whitaker Raymond | Paul Valley, OK 73075-1041 | Oil & Gas Operator | May 2007 |
| 788 | Whitaker, Fred | Carthage, TX 75633 | Gas Operator | Mar 2001 |
| 789 | Whitaker, Jerry | Sunset, TX 76270 | Oil & Gas Operator | May 2022 |
| 790 | Whitco Operating Company | Duncan, OK 73534-1936 | Oil & Gas Operator | Oct 2009 |
| 791 | Whitco Petroleum, LP | Leoti, KS 67861 | Oil & Gas Operator | Dec 2024 |
| 792 | Whitdale Inc | Cushing, OK 74023 | Oil & Gas Operator | Aug 2023 |
| 793 | White & Bancroft Et Al | | Oil Operator | Jan 1996 |
| 794 | White & Ellis DR | | Oil & Gas Operator | Aug 1995 |
| 795 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Dec 2024 |
| 796 | White Alton L Trust | Nowata, OK 74048 | Oil & Gas Operator | Aug 2013 |
| 797 | White Brothers Investment Inc | Dallas, TX 75201 | Oil & Gas Operator | Apr 2014 |
| 798 | White Buffalo Petroleum Co | Bethany, OK 73008-3104 | Oil & Gas Operator | Jun 2007 |
| 799 | White Butte Oil Operations, LLC | | Oil & Gas Operator | Feb 2025 |
| 800 | White Clarence A | Lawton, OK 73505-4927 | Oil & Gas Operator | Jan 2025 |