| 31501 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 31502 | Western Oil Refining Company | Kemmerrer, WY 83101 | Oil & Gas Operator | Dec 1994 |
| 31503 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Aug 2025 |
| 31504 | Western Pacific Farms, Inc. | Copeland, KS 67837 | Oil & Gas Operator | Apr 2020 |
| 31505 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 31506 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 31507 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 31508 | Western Pride Resources, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2011 |
| 31509 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2025 |
| 31510 | Western Products Corporation | Fairview, OK 73737 | Oil & Gas Operator | Nov 2004 |
| 31511 | Western Properti | | Oil Operator | Oct 1987 |
| 31512 | Western Reserve Exp | Perry, OH 44081 | Oil & Gas Operator | Dec 2003 |
| 31513 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 31514 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 31515 | Western Reserves Oil Co Inc And Sullivan And Co | | Oil & Gas Operator | Jul 2001 |
| 31516 | Western Resources And Clean Energy, LLC | Manti, UT 84642 | Oil & Gas Operator | Sep 2025 |
| 31517 | Western Resources, Inc. | | Oil Operator | Jun 1994 |
| 31518 | Western Resources{Wva}Inc | Chantilly, VA 22022 | Oil & Gas Operator | Dec 1994 |
| 31519 | Western Sky Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 31520 | Western States International Inc. | | Oil & Gas Operator | Aug 2025 |
| 31521 | Western Tank Trucks Inc | Hennessey, OK 73742 | Oil Operator | Jul 2011 |
| 31522 | Westfield Energy Corp. | | Oil & Gas Operator | Mar 1991 |
| 31523 | Westgate Oil Com | | Oil Operator | Mar 1993 |
| 31524 | Westgate Oil Company, Inc. | Eureka, KS 67045 | Oil & Gas Operator | Aug 2025 |
| 31525 | Westgate Petroleum, Inc. | Fritch, TX 79036 | Oil & Gas Operator | Nov 2001 |
| 31526 | Westhall Associates, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 1997 |
| 31527 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 31528 | Westinghouse Elec Co LLC | Monroeville, PA 15146-2808 | Gas Operator | Dec 2024 |
| 31529 | Westlake Energy Consultants Corp | Thousand Oaks, CA 91362 | Oil & Gas Operator | Aug 2003 |
| 31530 | Westlake Energy Consultants, Inc. | Westlake VIllage, CA 91362 | Gas Operator | Dec 2019 |
| 31531 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 31532 | Westlands Resources Corporation | Monrovia, CA 91016 | Oil & Gas Operator | Nov 2025 |
| 31533 | Westmore Drillin | | Oil & Gas Operator | Oct 1995 |
| 31534 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 31535 | Westmoreland Gas, LLC | | Oil & Gas Operator | Dec 2021 |
| 31536 | Westneft LLC | Brooklyn, NY 11204 | Oil Operator | Nov 2025 |
| 31537 | Westoil LLC | Austin, TX 78747 | Oil & Gas Operator | Nov 2025 |
| 31538 | Weston Management & Operations Group | Centreville, MD 21617 | Oil Operator | May 1997 |
| 31539 | Westover Production Co., LLC | Kermit, TX 79745 | Oil & Gas Operator | Nov 2025 |
| 31540 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | Nov 2025 |
| 31541 | Westphal Oil & Gas Inc | Fort Smith, AR 72901-2199 | Oil & Gas Operator | Feb 2015 |
| 31542 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 31543 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 31544 | Westport Oil Com | | Oil Operator | Feb 1994 |
| 31545 | Westport Petrole | | Oil Operator | Feb 1985 |
| 31546 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 2025 |
| 31547 | Westshore Operating Inc | Naples, FL 34109-0549 | Oil & Gas Operator | Dec 2011 |
| 31548 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 31549 | Westside Farming Co. Inc. | | Gas Operator | Dec 1995 |
| 31550 | Westside Wells Inc | Altus, OK 73521 | Oil & Gas Operator | Nov 2020 |
| 31551 | Weststar Exploration Co | Houston, TX 77027 | Oil & Gas Operator | Sep 2025 |
| 31552 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Aug 2025 |
| 31553 | Weststar Operating Company | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2015 |
| 31554 | Weststar Resourc | | Oil Operator | Sep 1992 |
| 31555 | Westwin Energy I, LP | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 31556 | Westwind Exploration Company | Oklahoma City, OK 73123 | Oil & Gas Operator | Oct 1998 |
| 31557 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 31558 | Wetwick DRLG. & Prod. | Carlsbad, TX 76934 | Oil Operator | Nov 2025 |
| 31559 | Wetzel Oil Company | Austin, TX 78738 | Oil & Gas Operator | May 2007 |
| 31560 | Wetzel Producing Company | Duncan, OK 73533-4602 | Oil & Gas Operator | Aug 2025 |
| 31561 | Weva Oil Corp. | | Oil & Gas Operator | Nov 2019 |
| 31562 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | Aug 2025 |
| 31563 | Wexpro Development Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Aug 2025 |
| 31564 | Wexpro II Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Aug 2025 |
| 31565 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 31566 | WF Company, LTD. | Midland, TX 79705 | Oil & Gas Operator | Oct 1995 |
| 31567 | WF Operating LLC | Bartlesville, OK 74003 | Oil Operator | May 2023 |
| 31568 | WFD Oil Corporation | Edmond, OK 73012 | Oil & Gas Operator | Aug 2025 |
| 31569 | WFMMS, Inc. | Batson, TX 77519 | Oil & Gas Operator | Nov 2025 |
| 31570 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Nov 2025 |
| 31571 | WG Oil & Gas LLC | Okmulgee, OK 74447-7862 | Oil & Gas Operator | Dec 2022 |
| 31572 | WG Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Nov 2025 |
| 31573 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |
| 31574 | WGM Gas Co Inc | Creekside, PA 15732-8500 | Oil & Gas Operator | Dec 2024 |
| 31575 | Wgo Resources, LLC | | Oil & Gas Operator | Aug 2025 |
| 31576 | WGP-KHC, LLC | Houston, TX 77002 | Oil Operator | May 2017 |
| 31577 | WGR, Inc. | Houston, TX 77046 | Gas Operator | Jul 2007 |
| 31578 | Wgsi Enterprise LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Nov 2025 |
| 31579 | Wharton Oil Co. | Vernon, TX 76384 | Oil & Gas Operator | Dec 2000 |
| 31580 | Whatley, O. B. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 1993 |
| 31581 | Whatley, O.B. Oil Company, Inc. | Bivins, TX 75555 | Oil & Gas Operator | Nov 2025 |
| 31582 | WHC Oper LLC | Commodore, PA 15729-9109 | Gas Operator | Dec 2024 |
| 31583 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 31584 | Wheatbelt Invest | | Oil Operator | Mar 1991 |
| 31585 | Wheatland Oil & | | Oil & Gas Operator | Aug 1984 |
| 31586 | Wheatland Oil Inc | Enid, OK 73702-1032 | Oil & Gas Operator | Mar 2015 |
| 31587 | Wheeler & Hanlin MFG Co Inc | Tulsa, OK 74148 | Oil Operator | Jun 1998 |
| 31588 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Jul 2025 |
| 31589 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Nov 2025 |
| 31590 | Wheeler Michael D | Newark, OH 43055 | Oil & Gas Operator | Dec 2024 |
| 31591 | Wheeler Oil & Gas Inc | Tulsa, OK 74103-4293 | Oil & Gas Operator | Jan 2007 |
| 31592 | Wheeler Oil Co. (A) | Amarillo, TX 79114 | Gas Operator | Apr 2001 |
| 31593 | Wheeler Oil Company | Sperry, OK 74073-9417 | Oil & Gas Operator | Jun 2025 |
| 31594 | Wheeler Oil, LTD | Isonville, KY 41149 | Oil & Gas Operator | Dec 2023 |
| 31595 | Wheeler Operating Corporation | Fort Worth, TX 76109 | Oil & Gas Operator | Nov 2025 |
| 31596 | Wheeler Richard Jr | Oklahoma City, OK 73112-8857 | Oil & Gas Operator | Mar 2005 |
| 31597 | Whelan Brothers, Inc. | Oil City, LA 71061 | Oil & Gas Operator | May 2015 |
| 31598 | Wheless Drilling Company | | Oil & Gas Operator | Dec 1989 |
| 31599 | Wheless Drilling Company Et Al | | Oil & Gas Operator | Dec 1989 |
| 31600 | Wheless DRLG Co &R.M.Bergstein | | Oil Operator | May 1986 |