| 11901 | Wapiti Energy, LLC | Houston, TX 77024 | Oil & Gas Operator | Jul 2006 |
| 11902 | Wapiti Operating, LLC | Houston, TX 77043 | Oil & Gas Operator | Oct 2025 |
| 11903 | Warbonnet Exploration Company | Houston, TX 77056 | Oil & Gas Operator | Apr 2016 |
| 11904 | Ward Oil Co. | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 11905 | Ward Trust | Spring, TX 77383 | Oil & Gas Operator | May 2013 |
| 11906 | Ward, Charles Oil Company | Olney, TX 76374 | Oil Operator | Oct 2025 |
| 11907 | Ward, E. B. | Alice, TX 78333 | Oil & Gas Operator | Jun 2001 |
| 11908 | Ward, L. S. | Graham, TX 76450 | Oil & Gas Operator | Jun 2001 |
| 11909 | Ward, Ted G. Jr. | Monahans, TX 79756 | Oil & Gas Operator | Nov 2000 |
| 11910 | Warner Oil Co., Inc. | Canyon, TX 79015 | Oil & Gas Operator | May 2013 |
| 11911 | Warner Sisters, LLC | Thompsons Sta, TN 37179 | Oil Operator | Oct 2025 |
| 11912 | Warner, Mark T. Oil Co | Pampa, TX 79065 | Oil & Gas Operator | Jul 2021 |
| 11913 | Warner-Pawel | Alice, TX 78333 | Oil & Gas Operator | Oct 2025 |
| 11914 | Warnock Operating Company, LLC | Graham, TX 76450 | Oil & Gas Operator | Jul 2013 |
| 11915 | Warren American Oil Co | Tulsa, OK 74147 | Oil & Gas Operator | Jul 2025 |
| 11916 | Warren American Oil Company LLC | Tulsa, OK 74147 | Oil & Gas Operator | Oct 2025 |
| 11917 | Warren Producers Inc | Bowling Green, KY 42102 | Oil & Gas Operator | Dec 2017 |
| 11918 | Warren Production Services | Caldwell, TX 77836 | Oil & Gas Operator | Oct 2025 |
| 11919 | Warren, Earl T. | San Angelo, TX 76906 | Oil & Gas Operator | Oct 2025 |
| 11920 | Warren, Joe H. | Dallas, TX 75206 | Oil & Gas Operator | Oct 2001 |
| 11921 | Warrior Exploration LLC | Sapulpa, OK 74067-1912 | Oil & Gas Operator | Jun 2025 |
| 11922 | Warrior Resources Inc. | Mexia, TX 76667 | Oil & Gas Operator | Oct 2025 |
| 11923 | Warwick Associates LC | Oklahoma City, OK 73112 | Oil & Gas Operator | Jun 2025 |
| 11924 | Warwick Oil & Gas, Inc. | Houston, TX 77098 | Oil & Gas Operator | Feb 1993 |
| 11925 | Warwick-Artemis, LLC | Nichols Hill, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 11926 | Wash, Robert C. | Forsan, TX 79733 | Oil & Gas Operator | Nov 2000 |
| 11927 | Wash, Robert C. Inc. | Forsan, TX 79733 | Oil & Gas Operator | Oct 2025 |
| 11928 | Washita Oil And Gas, L.L.C. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 11929 | Washita Production Company | Tulsa, OK 74136 | Oil & Gas Operator | May 2006 |
| 11930 | Watco Energy | Jacksboro, TX 76458 | Oil & Gas Operator | Oct 2025 |
| 11931 | Watco Energy, Inc. | Tyler, TX 75713 | Oil & Gas Operator | Apr 1996 |
| 11932 | Water Works Engineering, Inc. | Rockdale, TX 76567 | Oil & Gas Operator | Jan 1998 |
| 11933 | Waterbridge Texas Operating LLC | Houston, TX 77056 | Oil & Gas Operator | Oct 2025 |
| 11934 | Waters Eng. & Operating, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Sep 2013 |
| 11935 | Waters Petroleum | Albany, TX 76430 | Oil & Gas Operator | Aug 2016 |
| 11936 | Watkins Production Company | Dallas, TX 75229 | Oil & Gas Operator | Feb 2008 |
| 11937 | Watkins, J. B. | Borger, TX 79007 | Oil & Gas Operator | May 2009 |
| 11938 | Watson Energy Investments, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2025 |
| 11939 | Watson Oil & Gas Co. | Gorman, TX 76454 | Oil & Gas Operator | Jan 2002 |
| 11940 | Watson Oil & Gas, Inc. | Spicewood, TX 78669 | Oil & Gas Operator | Oct 2025 |
| 11941 | Watson Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2003 |
| 11942 | Watson Packer Employee Fund | Monahans, TX 79756 | Oil & Gas Operator | Oct 2025 |
| 11943 | Watson, B. G. Oil Field Salv Inc | Coleman, TX 76834 | Oil & Gas Operator | Mar 2000 |
| 11944 | Watt Energy, LLC | Port Barre, LA 70577 | Oil & Gas Operator | Oct 2025 |
| 11945 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 11946 | Way, Ralph L., Inc. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 11947 | Wayland Drilling & Explr., Inc. | Grapevine, TX 76099 | Oil & Gas Operator | Apr 2006 |
| 11948 | Waylander LLC | Plano, TX 75025 | Oil & Gas Operator | Oct 2025 |
| 11949 | Waymar Oil & Gas Company | Texarkana, TX 75503 | Oil & Gas Operator | Jan 2007 |
| 11950 | Wayne E. Glenn Associates, Inc. | Dickinson, TX 77539 | Oil & Gas Operator | Jan 2016 |
| 11951 | WB Mullin Operating LLC | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 11952 | WBH Energy Partners LLC | Austin, TX 78703 | Oil & Gas Operator | Oct 2025 |
| 11953 | WBR, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 1995 |
| 11954 | WCS Oil & Gas Corporation | Dallas, TX 75209 | Oil & Gas Operator | Aug 2021 |
| 11955 | WCT Leasing Co. | Austin, TX 78734 | Oil & Gas Operator | Apr 2019 |
| 11956 | WCWB Energy, LLC | Midland, TX 79701 | Oil Operator | Sep 2015 |
| 11957 | Weakland Investments, Inc. | Denver, CO 80215 | Oil & Gas Operator | Oct 2025 |
| 11958 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Oct 2025 |
| 11959 | Weathers Exploration, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Oct 2025 |
| 11960 | Weatherston, George D. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2001 |
| 11961 | Weaver & Sharp | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Mar 1997 |
| 11962 | Weaver Global Operating, LLC | Colleyville, TX 76034 | Oil Operator | Oct 2025 |
| 11963 | Weber Energy Corporation | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 11964 | Weeks Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 11965 | Wefco, Inc. | Pampa, TX 79065 | Oil & Gas Operator | May 1993 |
| 11966 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 11967 | Weibye, Carolyn S. | Houston, TX 77098 | Oil & Gas Operator | Oct 2025 |
| 11968 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Jul 2025 |
| 11969 | Weinstrom Petroleum | Devine, TX 78016 | Oil Operator | Oct 2025 |
| 11970 | Weiser-Brown Oil Co | Magnolia, AR 71754 | Oil Operator | Jan 2025 |
| 11971 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Oct 2025 |
| 11972 | Weiss Oil Co. | Streator, IL 61364 | Oil & Gas Operator | Dec 1997 |
| 11973 | Wejco, Inc. | Rising Star, TX 76471 | Oil & Gas Operator | Oct 2025 |
| 11974 | Welcome Well Serv. & Boykin Bros | Abilene, TX 79604 | Oil & Gas Operator | Apr 1995 |
| 11975 | Welder Exploration & Prod., Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Dec 2022 |
| 11976 | Welder Operating, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2001 |
| 11977 | Welder-Heyer Energy, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2001 |
| 11978 | Welderxp LTD. | San Antonio, TX 78212 | Oil & Gas Operator | Oct 2025 |
| 11979 | Weldon Corporation | Houston, TX 77056 | Oil Operator | Feb 2020 |
| 11980 | Welhausen Operating Co., Inc. | Beeville, TX 78104 | Oil & Gas Operator | Aug 2003 |
| 11981 | Welhausen Operating Company, LP | Beeville, TX 78104 | Oil & Gas Operator | Nov 2016 |
| 11982 | Well Recycling Company | Olney, TX 76374 | Oil Operator | Aug 2005 |
| 11983 | Well-Co Solutions, LLC | Batson, TX 77519 | Oil Operator | Oct 2025 |
| 11984 | Wellington Securities, Inc. | Plano, TX 75093 | Gas Operator | Jul 2014 |
| 11985 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 11986 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Aug 2025 |
| 11987 | Wen-Be | Jourdanton, TX 78026 | Oil & Gas Operator | Oct 2025 |
| 11988 | Wendy Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Oct 2025 |
| 11989 | Wenexco, Inc. | Streetman, TX 75859 | Oil & Gas Operator | Oct 2025 |
| 11990 | Wentworth Energy, Inc. | Palestine, TX 75801 | Oil & Gas Operator | Jun 2009 |
| 11991 | Werner Oil, Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 1996 |
| 11992 | Wernette, Louis J. | Hondo, TX 78861 | Oil & Gas Operator | Sep 2023 |
| 11993 | Wes Pro, Inc. | Jacksboro, TX 76458 | Oil Operator | Jan 2013 |
| 11994 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 11995 | Wes-Mor Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 1994 |
| 11996 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 11997 | Wes-Tex Oil Co. (I) | Bangs, TX 76823 | Oil & Gas Operator | Oct 2025 |
| 11998 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Jul 2025 |
| 11999 | West Co., The | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2016 |
| 12000 | West Inland Energy, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Oct 2025 |