| 4901 | Watts And Hill Oil Company | | Oil Operator | Sep 1995 |
| 4902 | Wayman W. Buchanan | | Oil & Gas Operator | Feb 1986 |
| 4903 | Wayne J. Spears | | Oil & Gas Operator | Sep 2005 |
| 4904 | WCC Energy Group LLC | | Oil & Gas Operator | Dec 2024 |
| 4905 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2026 |
| 4906 | Weathersby Oil Co. | | Oil Operator | Oct 2001 |
| 4907 | Weaver Bros | | Oil Operator | Nov 1987 |
| 4908 | Weaver Expl & Brock Pet Corp | | Oil & Gas Operator | Apr 1983 |
| 4909 | Weaver Exploration Company | | Oil & Gas Operator | Jun 1991 |
| 4910 | Weaver Oil & Gas Corporation | | Oil & Gas Operator | Dec 1984 |
| 4911 | Webster Energy, Inc. | | Oil & Gas Operator | Jan 1999 |
| 4912 | Wedco Resources Corporation | | Oil & Gas Operator | Jul 1989 |
| 4913 | Weeks Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 4914 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Jul 2026 |
| 4915 | Wells-Battelstein O&G, Inc. | | Gas Operator | Dec 1986 |
| 4916 | Wenert Trich | | Oil & Gas Operator | Oct 1988 |
| 4917 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 4918 | Wesla Oil & Gas Co., Inc. | | Oil & Gas Operator | Jun 2001 |
| 4919 | Wessely Energy Company | Dallas, TX 75206 | Oil & Gas Operator | May 2001 |
| 4920 | Wessely Energy Corporation | | Oil & Gas Operator | Feb 1989 |
| 4921 | West Delta Oil Co. | | Oil & Gas Operator | Jul 2000 |
| 4922 | Westall Oil & Gas Co. | | Oil & Gas Operator | May 1982 |
| 4923 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 4924 | Westar Oil & Minerals | | Oil Operator | Feb 1999 |
| 4925 | Westek Resources, Inc. | | Oil & Gas Operator | Jan 2004 |
| 4926 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 4927 | Western Exploration, Inc. | | Oil Operator | May 1984 |
| 4928 | Western Gas Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 4929 | Western Resources, Inc. | | Oil Operator | Jun 1994 |
| 4930 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 4931 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 4932 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 4933 | Wheeler Oil Company | Sperry, OK 74073-9417 | Oil & Gas Operator | Mar 2026 |
| 4934 | Wheless Drilling Company | | Oil & Gas Operator | Dec 1989 |
| 4935 | Wheless Drilling Company Et Al | | Oil & Gas Operator | Dec 1989 |
| 4936 | Wheless DRLG Co &R.M.Bergstein | | Oil Operator | May 1986 |
| 4937 | Wheless Industries, Inc. | Shreveport, LA 71101-5301 | Oil & Gas Operator | Sep 2002 |
| 4938 | Wheless Industries-Pelto Oil | | Oil & Gas Operator | Dec 1989 |
| 4939 | Whiskey Bay Oil Company | | Oil & Gas Operator | May 1990 |
| 4940 | White & Bancroft Et Al | | Oil Operator | Jan 1996 |
| 4941 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | Mar 2026 |
| 4942 | White Contracting Co., Inc. | | Oil Operator | Jan 1991 |
| 4943 | White Deer Production Co. Inc. | | Oil Operator | Jan 1999 |
| 4944 | White Horse Energy Inc. | | Oil & Gas Operator | Jun 1989 |
| 4945 | White Marlin Operating Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 4946 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | Jul 2026 |
| 4947 | White Oil Company | Cement, OK 73017-0515 | Oil Operator | Jun 2002 |
| 4948 | White Operating Co., L.L.C. | | Oil & Gas Operator | Oct 2019 |
| 4949 | White River Operating LLC | Gilmer, TX 75644 | Oil & Gas Operator | May 2026 |
| 4950 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Jul 2026 |
| 4951 | White Sands Energy LLC | | Oil Operator | Jan 2025 |
| 4952 | Whitetail Operators LLC | | Oil Operator | Nov 2021 |
| 4953 | Whitewing & Whitewing Oil LLC | | Oil & Gas Operator | May 2004 |
| 4954 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 4955 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 4956 | Whitney Oil & Gas, LLC | | Oil & Gas Operator | Jan 2025 |
| 4957 | Whittier Operating Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2007 |
| 4958 | Whittington Operating Company | Houston, TX 77069 | Oil & Gas Operator | Jul 2026 |
| 4959 | Whitton Company, Inc. | | Oil & Gas Operator | Jul 2020 |
| 4960 | WHK, Inc. | | Oil & Gas Operator | Oct 1993 |
| 4961 | Wichita River Oil Corporation | Englewood, CO 80111 | Oil & Gas Operator | Apr 2009 |
| 4962 | Wicker Oil Co | | Oil & Gas Operator | Feb 1992 |
| 4963 | Wicker, La. Cent. & Clovelly | | Gas Operator | Jul 1983 |
| 4964 | Wilco Oil Gas & Expl. Corp. | | Oil & Gas Operator | Mar 1979 |
| 4965 | Wilcobill Corporation | | Oil Operator | Dec 1986 |
| 4966 | Wilcox Energy Company | | Oil & Gas Operator | Apr 2026 |
| 4967 | Wilcox Operating Company | | Oil Operator | Dec 1989 |
| 4968 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Jul 2026 |
| 4969 | Wildcat Equipment Co. Inc. | | Oil Operator | Dec 1987 |
| 4970 | Wildcat Midstream Caddo LLC | | Oil Operator | May 2017 |
| 4971 | Wildcat Well Services, LTD. | | Oil Operator | Oct 1989 |
| 4972 | Wildhorse Resources Management Co, LLC | | Oil & Gas Operator | Feb 2018 |
| 4973 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 4974 | Wilkerson Oil Company | | Oil Operator | Dec 1991 |
| 4975 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Apr 2026 |
| 4976 | Will Haristy, Jr. | | Oil & Gas Operator | Nov 2024 |
| 4977 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Jul 2026 |
| 4978 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Jul 2026 |
| 4979 | William D. Pittman | | Oil & Gas Operator | Jun 1991 |
| 4980 | William F. Powell | | Oil & Gas Operator | Jun 1979 |
| 4981 | William Lagnion | | Oil & Gas Operator | Aug 1998 |
| 4982 | William M. Williams | | Oil Operator | May 2018 |
| 4983 | William Marvin Hobbs, SR. | | Oil Operator | Aug 2002 |
| 4984 | Williams Exploration Company | | Oil & Gas Operator | Dec 1986 |
| 4985 | Williams Pressure Service Co. | | Oil Operator | Sep 1985 |
| 4986 | Williams-Cody, Inc. | Houston, TX 77060 | Oil & Gas Operator | May 1994 |
| 4987 | Williams-Robinson | | Oil Operator | Mar 1988 |
| 4988 | Williamson & Smitherman | | Oil & Gas Operator | Dec 2008 |
| 4989 | Williamson Oil & Gas, Inc. | Shreveport, LA 71166 | Oil & Gas Operator | Dec 2024 |
| 4990 | Williamson Pumping Ser., Inc. | | Oil Operator | Nov 2024 |
| 4991 | Willow Springs Production, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 1999 |
| 4992 | Wilson Production Co Of La,Inc | | Oil & Gas Operator | Apr 1991 |
| 4993 | Wilson Well Service | Loco, OK 73442-0114 | Oil & Gas Operator | Mar 2018 |
| 4994 | Win Oil Company | Russell, KS 67665 | Oil & Gas Operator | Jul 2021 |
| 4995 | Winbeau Oil & Gas Co. | | Oil & Gas Operator | Oct 2013 |
| 4996 | Winchester Energy Operating Co. | Austin, TX 78746 | Oil & Gas Operator | Jul 2026 |
| 4997 | Winchester Production Company | Shreveport, LA 71129 | Oil & Gas Operator | Nov 2008 |
| 4998 | Windfohr Oil Company | | Oil & Gas Operator | May 1980 |
| 4999 | Windham Oil Company | | Oil & Gas Operator | Dec 1987 |
| 5000 | Windham Oil Corp. | | Oil & Gas Operator | Dec 2024 |