| 4901 | Wagon Wheel Arklatex, LLC | | Oil & Gas Operator | May 2018 |
| 4902 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 4903 | Walker Energy, LLC | | Oil & Gas Operator | Nov 2024 |
| 4904 | Walker La. Properties | | Oil & Gas Operator | Oct 1990 |
| 4905 | Walker Management Company | | Oil & Gas Operator | Apr 1988 |
| 4906 | Walker-Wilson | | Oil & Gas Operator | Jul 1999 |
| 4907 | Wallace D. Putman, Jr. | | Oil Operator | Jan 2025 |
| 4908 | Wallace Operating Company | | Oil & Gas Operator | Sep 1986 |
| 4909 | Waller Brothers, Inc. | | Oil & Gas Operator | Jul 2004 |
| 4910 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Sep 2025 |
| 4911 | Walter Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 4912 | Walter T. Lanaux | | Oil & Gas Operator | Nov 1990 |
| 4913 | Walter W. Heard, Jr. | | Oil & Gas Operator | Dec 1995 |
| 4914 | Walters Production | | Oil Operator | Mar 2005 |
| 4915 | Wapiti Operating, LLC | Houston, TX 77043 | Oil & Gas Operator | Sep 2025 |
| 4916 | Warhorse Oil & Gas, LLC | | Oil & Gas Operator | Dec 2018 |
| 4917 | Warwick Oil & Gas, Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 1993 |
| 4918 | Warwick Oil Corp. | | Oil & Gas Operator | Mar 1990 |
| 4919 | Watchtower Petroleum, LLC | | Oil & Gas Operator | Jun 2025 |
| 4920 | Watson Energy, L.L.C. | | Oil & Gas Operator | Jun 2005 |
| 4921 | Watson Oil & Gas Corp. | | Oil Operator | Aug 1994 |
| 4922 | Watson Oil Corporation | | Oil & Gas Operator | Jun 1981 |
| 4923 | Watts And Hill Oil Company | | Oil Operator | Sep 1995 |
| 4924 | Wayman W. Buchanan | | Oil & Gas Operator | Feb 1986 |
| 4925 | Wayne J. Spears | | Oil & Gas Operator | Sep 2005 |
| 4926 | WCC Energy Group LLC | | Oil & Gas Operator | Dec 2024 |
| 4927 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 4928 | Weathersby Oil Co. | | Oil Operator | Oct 2001 |
| 4929 | Weaver Bros | | Oil Operator | Nov 1987 |
| 4930 | Weaver Expl & Brock Pet Corp | | Oil & Gas Operator | Apr 1983 |
| 4931 | Weaver Exploration Company | | Oil & Gas Operator | Jun 1991 |
| 4932 | Weaver Oil & Gas Corporation | | Oil & Gas Operator | Dec 1984 |
| 4933 | Webster Energy, Inc. | | Oil & Gas Operator | Jan 1999 |
| 4934 | Wedco Resources Corporation | | Oil & Gas Operator | Jul 1989 |
| 4935 | Weeks Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 4936 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Sep 2025 |
| 4937 | Wells-Battelstein O&G, Inc. | | Gas Operator | Dec 1986 |
| 4938 | Wenert Trich | | Oil & Gas Operator | Oct 1988 |
| 4939 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 4940 | Wesla Oil & Gas Co., Inc. | | Oil & Gas Operator | Jun 2001 |
| 4941 | Wessely Energy Company | Dallas, TX 75206 | Oil & Gas Operator | May 2001 |
| 4942 | Wessely Energy Corporation | | Oil & Gas Operator | Feb 1989 |
| 4943 | West Delta Oil Co. | | Oil & Gas Operator | Jul 2000 |
| 4944 | Westall Oil & Gas Co. | | Oil & Gas Operator | May 1982 |
| 4945 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 4946 | Westar Oil & Minerals | | Oil Operator | Feb 1999 |
| 4947 | Westek Resources, Inc. | | Oil & Gas Operator | Jan 2004 |
| 4948 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 4949 | Western Exploration, Inc. | | Oil Operator | May 1984 |
| 4950 | Western Gas Resources Inc | Denver, CO 80202 | Oil & Gas Operator | Dec 2004 |
| 4951 | Western Resources, Inc. | | Oil Operator | Jun 1994 |
| 4952 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 4953 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 4954 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 4955 | Wheeler Oil Company | Sperry, OK 74073-9417 | Oil & Gas Operator | May 2025 |
| 4956 | Wheless Drilling Company | | Oil & Gas Operator | Dec 1989 |
| 4957 | Wheless Drilling Company Et Al | | Oil & Gas Operator | Dec 1989 |
| 4958 | Wheless DRLG Co &R.M.Bergstein | | Oil Operator | May 1986 |
| 4959 | Wheless Industries, Inc. | Shreveport, LA 71101-5301 | Oil & Gas Operator | Sep 2002 |
| 4960 | Wheless Industries-Pelto Oil | | Oil & Gas Operator | Dec 1989 |
| 4961 | Whiskey Bay Oil Company | | Oil & Gas Operator | May 1990 |
| 4962 | White & Bancroft Et Al | | Oil Operator | Jan 1996 |
| 4963 | White & Ellis Drilling, Inc. | Wichita, KS 67206 | Oil & Gas Operator | May 2025 |
| 4964 | White Contracting Co., Inc. | | Oil Operator | Jan 1991 |
| 4965 | White Deer Production Co. Inc. | | Oil Operator | Jan 1999 |
| 4966 | White Horse Energy Inc. | | Oil & Gas Operator | Jun 1989 |
| 4967 | White Marlin Operating Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 4968 | White Oak Operating Company LLC | Houston, TX 77077 | Oil & Gas Operator | Sep 2025 |
| 4969 | White Oil Company | Cement, OK 73017-0515 | Oil Operator | Jun 2002 |
| 4970 | White Operating Co., L.L.C. | | Oil & Gas Operator | Oct 2019 |
| 4971 | White River Operating LLC | Gilmer, TX 75644 | Oil & Gas Operator | Jul 2025 |
| 4972 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Sep 2025 |
| 4973 | White Sands Energy LLC | | Oil Operator | Jan 2025 |
| 4974 | Whitetail Operators LLC | | Oil Operator | Nov 2021 |
| 4975 | Whitewing & Whitewing Oil LLC | | Oil & Gas Operator | May 2004 |
| 4976 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Sep 2025 |
| 4977 | Whiting Petroleum Corporation | Denver, CO 80290 | Oil & Gas Operator | Jan 2025 |
| 4978 | Whitney Oil & Gas, LLC | | Oil & Gas Operator | Jan 2025 |
| 4979 | Whittier Operating Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2007 |
| 4980 | Whittington Operating Company | Houston, TX 77069 | Oil & Gas Operator | Sep 2025 |
| 4981 | Whitton Company, Inc. | | Oil & Gas Operator | Jul 2020 |
| 4982 | WHK, Inc. | | Oil & Gas Operator | Oct 1993 |
| 4983 | Wichita River Oil Corporation | Englewood, CO 80111 | Oil & Gas Operator | Apr 2009 |
| 4984 | Wicker Oil Co | | Oil & Gas Operator | Feb 1992 |
| 4985 | Wicker, La. Cent. & Clovelly | | Gas Operator | Jul 1983 |
| 4986 | Wilco Oil Gas & Expl. Corp. | | Oil & Gas Operator | Mar 1979 |
| 4987 | Wilcobill Corporation | | Oil Operator | Dec 1986 |
| 4988 | Wilcox Energy Company | | Oil & Gas Operator | Jul 2025 |
| 4989 | Wilcox Operating Company | | Oil Operator | Dec 1989 |
| 4990 | Wilcox Operating Corporation | Shreveport, LA 71115 | Oil & Gas Operator | Sep 2025 |
| 4991 | Wildcat Equipment Co. Inc. | | Oil Operator | Dec 1987 |
| 4992 | Wildcat Midstream Caddo LLC | | Oil Operator | May 2017 |
| 4993 | Wildcat Well Services, LTD. | | Oil Operator | Oct 1989 |
| 4994 | Wildhorse Resources Management Co, LLC | | Oil & Gas Operator | Feb 2018 |
| 4995 | Wildhorse Resources, LLC | Houston, TX 77279 | Oil & Gas Operator | Feb 2015 |
| 4996 | Wilkerson Oil Company | | Oil Operator | Dec 1991 |
| 4997 | Will Energy Corporation | Dallas, TX 75201 | Oil & Gas Operator | Jun 2025 |
| 4998 | Will Haristy, Jr. | | Oil & Gas Operator | Nov 2024 |
| 4999 | Will-Drill Operating, L.L.C. | Shreveport, LA 71105 | Oil & Gas Operator | Sep 2025 |
| 5000 | Will-Drill Production Co., Inc. | Shreveport, LA 71105 | Oil & Gas Operator | Sep 2025 |