| 1 | W & T Offshore, L.L.C. | Houston, TX 77046 | Gas Operator | Jan 1999 |
| 2 | W & W Oil, Inc. | Lovington, NM 88260 | Oil & Gas Operator | May 1999 |
| 3 | W & W Production, LLC | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 4 | W & W Properties | Westbrook, TX 79565 | Oil & Gas Operator | Aug 2018 |
| 5 | W & W Services, Inc. | Palestine, TX 75802 | Oil & Gas Operator | Mar 2008 |
| 6 | W T X Capital Investments, LLC | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 7 | W&S Energy LLC | Woodward, OK 73801 | Oil & Gas Operator | Sep 2022 |
| 8 | W&T Offshore, Inc. | Houston, TX 77057 | Oil & Gas Operator | Feb 2026 |
| 9 | W&W Oil And Gas, Inc. | Muenster, TX 76252 | Oil Operator | Feb 2026 |
| 10 | W&W Oil Co | Denver City, TX 79323 | Oil Operator | Jun 2002 |
| 11 | W-N Energy Corp | Tulsa, OK 74121-1468 | Oil & Gas Operator | Nov 1994 |
| 12 | W. B. D. Oil & Gas Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 1995 |
| 13 | W. E. B. Well Tending Service, Inc. | Vienna, WV 26105 | Oil & Gas Operator | Nov 2011 |
| 14 | W. R. G. Oil & Gas, Inc. | Arlington, TX 76013 | Oil & Gas Operator | Dec 1993 |
| 15 | W. R. Williams, Inc. | Amarillo, TX 79105 | Gas Operator | Dec 2019 |
| 16 | W. T. Boyle & Co. | Graham, TX 76450 | Oil Operator | Mar 2008 |
| 17 | W.A. Oil Co. | Andrews, TX 79714 | Oil & Gas Operator | Aug 1997 |
| 18 | W.B.D. Oil And Gas Inc. | Pampa, TX 79066 | Oil & Gas Operator | Oct 2019 |
| 19 | W.D. Oil Company | Pampa, TX 79066 | Oil & Gas Operator | Oct 2001 |
| 20 | W.E.S. Operating Company, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | Nov 2011 |
| 21 | W.H.D., Inc. | Euless, TX 76039 | Oil & Gas Operator | Aug 1998 |
| 22 | W.I. Royalty, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Nov 2009 |
| 23 | W.L. Ranch Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Feb 2026 |
| 24 | W.O.G., Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 25 | W.P.P.I. Inc. | Westbrook, TX 79565 | Oil & Gas Operator | Jul 2013 |
| 26 | W.R. Guffey LLC | Dallas, TX 75206 | Oil & Gas Operator | Jul 2020 |
| 27 | W.T. Waggoner Estate, Inc. | Vernon, TX 76385 | Oil Operator | Feb 2026 |
| 28 | W.W. Energy | Luling, TX 78648 | Oil & Gas Operator | Feb 2026 |
| 29 | W.W.R. Holding, LLC | Coleman, TX 76834 | Oil & Gas Operator | Mar 2008 |
| 30 | Wacker Oil Inc. | Houston, TX 77002 | Oil & Gas Operator | Aug 1996 |
| 31 | Waco Petro, LP | Sulphur SPGS, TX 75483 | Oil Operator | Sep 2015 |
| 32 | Waco Production Co. | Archer City, TX 76351 | Oil & Gas Operator | Sep 1993 |
| 33 | Waddell, Kent | Abilene, TX 79606 | Oil & Gas Operator | Nov 2010 |
| 34 | Wade Operating | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 35 | Wade, Jim | Olney, TX 76374 | Oil & Gas Operator | Feb 2026 |
| 36 | Wadi Exploration&Production,LLC | San Clemente, CA 92672 | Oil & Gas Operator | Jul 2020 |
| 37 | Wadi Operating, LLC | Houston, TX 77079 | Oil & Gas Operator | Feb 2026 |
| 38 | Wadi Petroleum Inc | Houston, TX 77014 | Oil & Gas Operator | May 2018 |
| 39 | Waelder Oil & Gas, Inc. | Fort Smith, AR 72903 | Oil & Gas Operator | Nov 2025 |
| 40 | Waelder, Martin K. | Tulsa, OK 74136 | Oil & Gas Operator | May 1997 |
| 41 | Waggner, Fred | Wichita Falls, TX 76307 | Oil & Gas Operator | Feb 2026 |
| 42 | Waggner, Robert | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2006 |
| 43 | Waggoner Operating, L.L.C. | Vernon, TX 76385 | Oil Operator | Feb 2026 |
| 44 | Waggoner, John S. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 2017 |
| 45 | Waggoner, Ralph E. | Windthorst, TX 76389 | Oil & Gas Operator | Dec 2010 |
| 46 | Waggoner, W. T., Estate | Vernon, TX 76385 | Oil & Gas Operator | Feb 2018 |
| 47 | Waggoner-Baldridge Oper. Co, Inc | Dallas, TX 75206 | Oil & Gas Operator | Jan 1998 |
| 48 | Wagman Petroleum, Inc. | Dallas, TX 75202 | Oil & Gas Operator | Feb 2026 |
| 49 | Wagman, Brent A. | Dallas, TX 75202 | Oil & Gas Operator | Feb 2026 |
| 50 | Wagner & Brown, LTD. | Midland, TX 79702 | Oil & Gas Operator | Aug 2014 |
| 51 | Wagner Energy LLC | Enid, OK 73701 | Oil Operator | Nov 2025 |
| 52 | Wagner Oil Company | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2026 |
| 53 | Wagner, Duer & Co. | Fort Worth, TX 76102 | Oil & Gas Operator | Jan 1999 |
| 54 | Wainoco Oil & Gas Company | Houston, TX 77024 | Oil & Gas Operator | Dec 2005 |
| 55 | Wako Oil Co. LLC | Graham, TX 76450 | Oil Operator | Feb 2026 |
| 56 | Walbet | Monahans, TX 79756 | Oil & Gas Operator | Dec 1993 |
| 57 | Walbet, Inc. | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 58 | Waldrop, L. E. | Houston, TX 77024 | Oil & Gas Operator | Jun 1996 |
| 59 | Walkabout Operating, LLC | Lubbock, TX 79424 | Oil & Gas Operator | Feb 2026 |
| 60 | Walker Oil & Gas | Early, TX 76802 | Oil & Gas Operator | Dec 2002 |
| 61 | Walker Oil And Gas LTD | Snyder, TX 79550 | Oil Operator | Feb 2026 |
| 62 | Walker Operating (I) | Wichita Falls, TX 76308 | Oil Operator | Feb 2026 |
| 63 | Walker'S Well Service | Gladewater, TX 75647 | Oil & Gas Operator | Aug 2003 |
| 64 | Walker, Daniel J. | La Vernia, TX 78121 | Oil Operator | Feb 2026 |
| 65 | Walker, Harrel L. | La Vernia, TX 78121 | Oil & Gas Operator | May 2023 |
| 66 | Walker, Kent | Midland, TX 79704 | Oil & Gas Operator | Jun 2004 |
| 67 | Walker, Tigner | Shreveport, LA 71138 | Oil & Gas Operator | Feb 2005 |
| 68 | Walking X Oil Co. | Whiteface, TX 79379 | Oil & Gas Operator | Feb 2026 |
| 69 | Wallace Oil & Gas Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Feb 2026 |
| 70 | Wallace Operating Company LLC | Metairie, LA 70003 | Gas Operator | Feb 2026 |
| 71 | Wallen Production Co. | Midland, TX 79702 | Oil & Gas Operator | Aug 1996 |
| 72 | Waller, C.W. Oil Co. | Albany, TX 76430 | Oil & Gas Operator | Feb 2026 |
| 73 | Wallis Energy, Inc. | Austin, TX 78746 | Oil & Gas Operator | Feb 2026 |
| 74 | Walls Energy, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2003 |
| 75 | Walls, G. M. & Frances, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Feb 2026 |
| 76 | Walsh & Watts Inc | Aledo, TX 76008 | Oil & Gas Operator | Feb 2026 |
| 77 | Walsh Petroleum, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2022 |
| 78 | Walsh Resources, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Feb 2026 |
| 79 | Walsh, F H Jr. Operating Co. Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Oct 2019 |
| 80 | Walsh, F. Howard, Jr. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 1994 |
| 81 | Walter Exploration Company | Dallas, TX 75206 | Oil & Gas Operator | Feb 2026 |
| 82 | Walter Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | May 2009 |
| 83 | Walter H. Husfeld Oil Co LLC | Bowie, TX 76230 | Oil & Gas Operator | Feb 2026 |
| 84 | Walter Oil & Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Feb 2026 |
| 85 | Walterscheid, A. D. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2014 |
| 86 | Walterscheid, R. F. | Muenster, TX 76252 | Oil & Gas Operator | Oct 1993 |
| 87 | Walton Producing Company | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2005 |
| 88 | Walton Producing Inc. | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 89 | Walton Properties LTD. | Midland, TX 79702 | Oil & Gas Operator | Feb 2004 |
| 90 | Walton, James A. | Midland, TX 79702 | Oil & Gas Operator | Oct 1994 |
| 91 | Walton, W. W. | Breckenridge, TX 76424 | Oil & Gas Operator | Sep 1994 |
| 92 | Wam Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Dec 2016 |
| 93 | Wandoo Energy, LLC | The Woodlands, TX 77382 | Oil & Gas Operator | Feb 2026 |
| 94 | Wapiti Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Jul 2006 |
| 95 | Wapiti Operating, LLC | Houston, TX 77043 | Oil & Gas Operator | Feb 2026 |
| 96 | Warbonnet Exploration Company | Houston, TX 77056 | Oil & Gas Operator | Apr 2016 |
| 97 | Ward Oil Co. | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 98 | Ward Trust | Spring, TX 77383 | Oil & Gas Operator | May 2013 |
| 99 | Ward, Charles Oil Company | Olney, TX 76374 | Oil Operator | Feb 2026 |
| 100 | Ward, E. B. | Alice, TX 78333 | Oil & Gas Operator | Jun 2001 |