| 11901 | Waters Eng. & Operating, Inc. | Corpus Chrsti, TX 78471 | Oil & Gas Operator | Sep 2013 |
| 11902 | Waters Petroleum | Albany, TX 76430 | Oil & Gas Operator | Aug 2016 |
| 11903 | Watkins Production Company | Dallas, TX 75229 | Oil & Gas Operator | Feb 2008 |
| 11904 | Watkins, J. B. | Borger, TX 79007 | Oil & Gas Operator | May 2009 |
| 11905 | Watson Energy Investments, LLC | Tulsa, OK 74103 | Oil & Gas Operator | Apr 2026 |
| 11906 | Watson Oil & Gas Co. | Gorman, TX 76454 | Oil & Gas Operator | Jan 2002 |
| 11907 | Watson Oil & Gas, Inc. | Spicewood, TX 78669 | Oil & Gas Operator | Apr 2026 |
| 11908 | Watson Operating Company | Pampa, TX 79066 | Oil & Gas Operator | Dec 2003 |
| 11909 | Watson Packer Employee Fund | Monahans, TX 79756 | Oil & Gas Operator | Apr 2026 |
| 11910 | Watson, B. G. Oil Field Salv Inc | Coleman, TX 76834 | Oil & Gas Operator | Mar 2000 |
| 11911 | Watt Energy, LLC | Port Barre, LA 70577 | Oil & Gas Operator | Apr 2026 |
| 11912 | Watusi Energy LLC | Midland, TX 79710 | Oil & Gas Operator | Apr 2026 |
| 11913 | Way, Ralph L., Inc. | Midland, TX 79701 | Oil & Gas Operator | Apr 2026 |
| 11914 | Wayland Drilling & Explr., Inc. | Grapevine, TX 76099 | Oil & Gas Operator | Apr 2006 |
| 11915 | Waylander LLC | Plano, TX 75025 | Oil & Gas Operator | Apr 2026 |
| 11916 | Waymar Oil & Gas Company | Texarkana, TX 75503 | Oil & Gas Operator | Jan 2007 |
| 11917 | Wayne E. Glenn Associates, Inc. | Dickinson, TX 77539 | Oil & Gas Operator | Jan 2016 |
| 11918 | WB Mullin Operating LLC | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 11919 | WBH Energy Partners LLC | Austin, TX 78703 | Oil & Gas Operator | Apr 2026 |
| 11920 | WBR, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 1995 |
| 11921 | WCS Oil & Gas Corporation | Dallas, TX 75209 | Oil & Gas Operator | Aug 2021 |
| 11922 | WCT Leasing Co. | Austin, TX 78734 | Oil & Gas Operator | Apr 2019 |
| 11923 | WCWB Energy, LLC | Midland, TX 79701 | Oil Operator | Sep 2015 |
| 11924 | Weakland Investments, Inc. | Denver, CO 80215 | Oil & Gas Operator | Apr 2026 |
| 11925 | Weatherly Oil & Gas, LLC | Dallas, TX 75206 | Oil & Gas Operator | Apr 2026 |
| 11926 | Weathers Exploration, Inc. | Tyler, TX 75702 | Oil & Gas Operator | Apr 2026 |
| 11927 | Weatherston, George D. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2001 |
| 11928 | Weaver & Sharp | Corpus Chrsti, TX 78403 | Oil & Gas Operator | Mar 1997 |
| 11929 | Weaver Global Operating, LLC | Colleyville, TX 76034 | Oil Operator | Apr 2026 |
| 11930 | Weber Energy Corporation | Dallas, TX 75219 | Oil & Gas Operator | Feb 2017 |
| 11931 | Weeks Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 11932 | Wefco, Inc. | Pampa, TX 79065 | Oil & Gas Operator | May 1993 |
| 11933 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 11934 | Weibye, Carolyn S. | Houston, TX 77098 | Oil & Gas Operator | Apr 2026 |
| 11935 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2026 |
| 11936 | Weinstrom Petroleum | Devine, TX 78016 | Oil Operator | Apr 2026 |
| 11937 | Weiser-Brown Oil Co | Magnolia, AR 71754 | Oil Operator | Jan 2025 |
| 11938 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Apr 2026 |
| 11939 | Weiss Oil Co. | Streator, IL 61364 | Oil & Gas Operator | Dec 1997 |
| 11940 | Wejco, Inc. | Rising Star, TX 76471 | Oil & Gas Operator | Apr 2026 |
| 11941 | Welcome Well Serv. & Boykin Bros | Abilene, TX 79604 | Oil & Gas Operator | Apr 1995 |
| 11942 | Welder Exploration & Prod., Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Dec 2022 |
| 11943 | Welder Operating, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2001 |
| 11944 | Welder-Heyer Energy, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2001 |
| 11945 | Welderxp LTD. | San Antonio, TX 78212 | Oil & Gas Operator | Apr 2026 |
| 11946 | Weldon Corporation | Houston, TX 77056 | Oil Operator | Feb 2020 |
| 11947 | Welhausen Operating Co., Inc. | Beeville, TX 78104 | Oil & Gas Operator | Aug 2003 |
| 11948 | Welhausen Operating Company, LP | Beeville, TX 78104 | Oil & Gas Operator | Nov 2016 |
| 11949 | Well Recycling Company | Olney, TX 76374 | Oil Operator | Aug 2005 |
| 11950 | Well-Co Solutions, LLC | Batson, TX 77519 | Oil & Gas Operator | Apr 2026 |
| 11951 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 11952 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Feb 2026 |
| 11953 | Wen-Be | Jourdanton, TX 78026 | Oil & Gas Operator | Apr 2026 |
| 11954 | Wendy Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2026 |
| 11955 | Wenexco, Inc. | Streetman, TX 75859 | Oil & Gas Operator | Apr 2026 |
| 11956 | Wentworth Energy, Inc. | Palestine, TX 75801 | Oil & Gas Operator | Jun 2009 |
| 11957 | Werner Oil, Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 1996 |
| 11958 | Wernette, Louis J. | Hondo, TX 78861 | Oil & Gas Operator | Sep 2023 |
| 11959 | Wes Pro, Inc. | Jacksboro, TX 76458 | Oil Operator | Jan 2013 |
| 11960 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 11961 | Wes-Mor Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 1994 |
| 11962 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 11963 | Wes-Tex Oil Co. (I) | Bangs, TX 76823 | Oil & Gas Operator | Apr 2026 |
| 11964 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Feb 2026 |
| 11965 | West Co., The | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2016 |
| 11966 | West Inland Energy, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Jan 2026 |
| 11967 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 11968 | West Oil Resources, LLC | Bertram, TX 78605 | Oil & Gas Operator | Apr 2026 |
| 11969 | West Petroleum Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Oct 2009 |
| 11970 | West Texas Diversified Interests | Eastland, TX 76448 | Oil & Gas Operator | Jun 2006 |
| 11971 | West Texas Exploration Co. | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 11972 | West Texas Oil And Gas Corp. | Houston, TX 77056 | Oil & Gas Operator | Feb 2014 |
| 11973 | West Texas Oil And Gas Oper.,Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2024 |
| 11974 | West Texas Royalties, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 11975 | West Texas Syndicate LLC. | Corpus Chrsti, TX 78414 | Oil Operator | Apr 2026 |
| 11976 | West Tuleta Operating Corp. | Tuleta, TX 78162 | Oil & Gas Operator | May 2019 |
| 11977 | West,Gordon T.Jr. & Rugeley,Stan | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2019 |
| 11978 | West-States Energy, Inc. | Rimrock, AZ 86335 | Oil Operator | Apr 2026 |
| 11979 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 11980 | Westbrook Oil & Gas Co. Inc. | Gainesville, TX 76240 | Oil & Gas Operator | Apr 2026 |
| 11981 | Westco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Apr 2026 |
| 11982 | Westech Energy Corporation | Denver, CO 80237 | Oil & Gas Operator | Mar 2011 |
| 11983 | Westerly Exploration, Inc. | Houston, TX 77256 | Oil & Gas Operator | Apr 2026 |
| 11984 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 11985 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Apr 2026 |
| 11986 | Western Disposal Systems, Inc. | Corrales, NM 87048 | Oil Operator | Apr 2026 |
| 11987 | Western DRLG. Co. | Longview, TX 75604 | Oil & Gas Operator | Nov 1996 |
| 11988 | Western Energy Group, LLC | Leander, TX 78641 | Oil & Gas Operator | Apr 2026 |
| 11989 | Western Energy Management, Inc. | Austin, TX 78716 | Oil & Gas Operator | Aug 1997 |
| 11990 | Western Field Exploration, Inc. | Dilley, TX 78017 | Oil & Gas Operator | Apr 2026 |
| 11991 | Western Gas Resources Storage | Northglenn, CO 80234 | Oil & Gas Operator | Jun 1999 |
| 11992 | Western Global Oil, Inc | Deerfld Beach, FL 33442 | Oil Operator | Apr 2026 |
| 11993 | Western Gulf Oil & Gas Inc. | Dallas, TX 75360 | Oil & Gas Operator | Jul 2000 |
| 11994 | Western Gulf Oil & Gas, LLC | Bishop, TX 78343 | Oil & Gas Operator | Apr 2026 |
| 11995 | Western Natural Gas Company | Shelby, MT 59474 | Oil & Gas Operator | Jan 2026 |
| 11996 | Western Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2014 |
| 11997 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 11998 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 11999 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 12000 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Dec 2025 |