| 11901 | Weeks Exploration Company | Houston, TX 77063 | Oil & Gas Operator | Aug 1995 |
| 11902 | Wefco, Inc. | Pampa, TX 79065 | Oil & Gas Operator | May 1993 |
| 11903 | Wehunt Oil Company, Inc. | Dallas, TX 75376 | Oil & Gas Operator | Nov 2002 |
| 11904 | Weibye, Carolyn S. | Houston, TX 77098 | Oil & Gas Operator | Jun 2026 |
| 11905 | Weinkauf Petroleum, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2026 |
| 11906 | Weinstrom Petroleum | Devine, TX 78016 | Oil Operator | Jun 2026 |
| 11907 | Weiser-Brown Oil Co | Magnolia, AR 71754 | Oil Operator | Jan 2025 |
| 11908 | Weiser-Brown Operating Company | Magnolia, AR 71754 | Oil & Gas Operator | Jun 2026 |
| 11909 | Weiss Oil Co. | Streator, IL 61364 | Oil & Gas Operator | Dec 1997 |
| 11910 | Wejco, Inc. | Rising Star, TX 76471 | Oil & Gas Operator | Jun 2026 |
| 11911 | Welcome Well Serv. & Boykin Bros | Abilene, TX 79604 | Oil & Gas Operator | Apr 1995 |
| 11912 | Welder Exploration & Prod., Inc. | San Antonio, TX 78212 | Oil & Gas Operator | Dec 2022 |
| 11913 | Welder Operating, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Mar 2001 |
| 11914 | Welder-Heyer Energy, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Feb 2001 |
| 11915 | Welderxp LTD. | San Antonio, TX 78212 | Oil & Gas Operator | Jun 2026 |
| 11916 | Weldon Corporation | Houston, TX 77056 | Oil Operator | Feb 2020 |
| 11917 | Welhausen Operating Co., Inc. | Beeville, TX 78104 | Oil & Gas Operator | Aug 2003 |
| 11918 | Welhausen Operating Company, LP | Beeville, TX 78104 | Oil & Gas Operator | Nov 2016 |
| 11919 | Well Recycling Company | Olney, TX 76374 | Oil Operator | Aug 2005 |
| 11920 | Well-Co Solutions, LLC | Batson, TX 77519 | Oil & Gas Operator | Jun 2026 |
| 11921 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 11922 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Apr 2026 |
| 11923 | Wen-Be | Jourdanton, TX 78026 | Oil & Gas Operator | Jun 2026 |
| 11924 | Wendy Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2026 |
| 11925 | Wenexco, Inc. | Streetman, TX 75859 | Oil & Gas Operator | Jun 2026 |
| 11926 | Wentworth Energy, Inc. | Palestine, TX 75801 | Oil & Gas Operator | Jun 2009 |
| 11927 | Werner Oil, Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 1996 |
| 11928 | Wernette, Louis J. | Hondo, TX 78861 | Oil & Gas Operator | Sep 2023 |
| 11929 | Wes Pro, Inc. | Jacksboro, TX 76458 | Oil Operator | Jan 2013 |
| 11930 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 11931 | Wes-Mor Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 1994 |
| 11932 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 11933 | Wes-Tex Oil Co. (I) | Bangs, TX 76823 | Oil & Gas Operator | Jun 2026 |
| 11934 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Mar 2026 |
| 11935 | West Co., The | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2016 |
| 11936 | West Inland Energy, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Jan 2026 |
| 11937 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 11938 | West Oil Resources, LLC | Bertram, TX 78605 | Oil & Gas Operator | Jun 2026 |
| 11939 | West Petroleum Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Oct 2009 |
| 11940 | West Texas Diversified Interests | Eastland, TX 76448 | Oil & Gas Operator | Jun 2006 |
| 11941 | West Texas Exploration Co. | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 11942 | West Texas Oil And Gas Corp. | Houston, TX 77056 | Oil & Gas Operator | Feb 2014 |
| 11943 | West Texas Oil And Gas Oper.,Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2024 |
| 11944 | West Texas Royalties, Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 11945 | West Texas Syndicate LLC. | Corpus Chrsti, TX 78414 | Oil Operator | Jun 2026 |
| 11946 | West Tuleta Operating Corp. | Tuleta, TX 78162 | Oil & Gas Operator | May 2019 |
| 11947 | West,Gordon T.Jr. & Rugeley,Stan | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2019 |
| 11948 | West-States Energy, Inc. | Rimrock, AZ 86335 | Oil Operator | Jun 2026 |
| 11949 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 11950 | Westbrook Oil & Gas Co. Inc. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2026 |
| 11951 | Westco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Jun 2026 |
| 11952 | Westech Energy Corporation | Denver, CO 80237 | Oil & Gas Operator | Mar 2011 |
| 11953 | Westerly Exploration, Inc. | Houston, TX 77256 | Oil & Gas Operator | Jun 2026 |
| 11954 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 11955 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 11956 | Western Disposal Systems, Inc. | Corrales, NM 87048 | Oil Operator | Jun 2026 |
| 11957 | Western DRLG. Co. | Longview, TX 75604 | Oil & Gas Operator | Nov 1996 |
| 11958 | Western Energy Group, LLC | Leander, TX 78641 | Oil & Gas Operator | Jun 2026 |
| 11959 | Western Energy Management, Inc. | Austin, TX 78716 | Oil & Gas Operator | Aug 1997 |
| 11960 | Western Field Exploration, Inc. | Dilley, TX 78017 | Oil & Gas Operator | Jun 2026 |
| 11961 | Western Gas Resources Storage | Northglenn, CO 80234 | Oil & Gas Operator | Jun 1999 |
| 11962 | Western Global Oil, Inc | Deerfld Beach, FL 33442 | Oil Operator | Jun 2026 |
| 11963 | Western Gulf Oil & Gas Inc. | Dallas, TX 75360 | Oil & Gas Operator | Jul 2000 |
| 11964 | Western Gulf Oil & Gas, LLC | Bishop, TX 78343 | Oil & Gas Operator | Jun 2026 |
| 11965 | Western Natural Gas Company | Shelby, MT 59474 | Oil & Gas Operator | Feb 2026 |
| 11966 | Western Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2014 |
| 11967 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 11968 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 11969 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 11970 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Feb 2026 |
| 11971 | Western Pride Resources, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2011 |
| 11972 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jun 2026 |
| 11973 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 11974 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 11975 | Western Sky Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 11976 | Westgate Petroleum, Inc. | Fritch, TX 79036 | Oil & Gas Operator | Nov 2001 |
| 11977 | Westhall Associates, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 1997 |
| 11978 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 11979 | Westlake Energy Consultants Corp | Thousand Oaks, CA 91362 | Oil & Gas Operator | Aug 2003 |
| 11980 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 11981 | Westlands Resources Corporation | Monrovia, CA 91016 | Oil & Gas Operator | Jun 2026 |
| 11982 | Westoil LLC | Austin, TX 78747 | Oil & Gas Operator | Jun 2026 |
| 11983 | Westover Production Co., LLC | Kermit, TX 79745 | Oil & Gas Operator | Jun 2026 |
| 11984 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | Jun 2026 |
| 11985 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 11986 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 11987 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Jun 2026 |
| 11988 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 11989 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Mar 2026 |
| 11990 | Weststar Operating Company | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2015 |
| 11991 | Westwin Energy I, LP | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 11992 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 11993 | Wetwick DRLG. & Prod. | Carlsbad, TX 76934 | Oil Operator | Jun 2026 |
| 11994 | Wetzel Oil Company | Austin, TX 78738 | Oil & Gas Operator | May 2007 |
| 11995 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 11996 | WF Company, LTD. | Midland, TX 79705 | Oil & Gas Operator | Oct 1995 |
| 11997 | WFMMS, Inc. | Batson, TX 77519 | Oil & Gas Operator | Jun 2026 |
| 11998 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jun 2026 |
| 11999 | WG Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Jun 2026 |
| 12000 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |