| 12101 | Well-Co Solutions, LLC | Batson, TX 77519 | Oil Operator | Dec 2025 |
| 12102 | Wellington Securities, Inc. | Plano, TX 75093 | Gas Operator | Jul 2014 |
| 12103 | Wells Oilfield Services, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 12104 | Wellstar Corporation | Northglenn, CO 80233 | Oil & Gas Operator | Oct 2025 |
| 12105 | Wen-Be | Jourdanton, TX 78026 | Oil & Gas Operator | Dec 2025 |
| 12106 | Wendy Oil Company | Wichita Falls, TX 76307 | Oil & Gas Operator | Dec 2025 |
| 12107 | Wenexco, Inc. | Streetman, TX 75859 | Oil & Gas Operator | Dec 2025 |
| 12108 | Wentworth Energy, Inc. | Palestine, TX 75801 | Oil & Gas Operator | Jun 2009 |
| 12109 | Werner Oil, Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 1996 |
| 12110 | Wernette, Louis J. | Hondo, TX 78861 | Oil & Gas Operator | Sep 2023 |
| 12111 | Wes Pro, Inc. | Jacksboro, TX 76458 | Oil Operator | Jan 2013 |
| 12112 | Wes-Mor Drilling, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 12113 | Wes-Mor Oil & Gas, Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 1994 |
| 12114 | Wes-Tex Drilling Company | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 12115 | Wes-Tex Oil Co. (I) | Bangs, TX 76823 | Oil & Gas Operator | Dec 2025 |
| 12116 | West Bay Exploration Company | Muenster, TX 76252 | Oil & Gas Operator | Sep 2025 |
| 12117 | West Co., The | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2016 |
| 12118 | West Inland Energy, Inc. | Fort Worth, TX 76179 | Oil & Gas Operator | Dec 2025 |
| 12119 | West Mountain Operating Co, Inc. | Longview, TX 75604 | Oil & Gas Operator | Feb 2019 |
| 12120 | West Oil Resources, LLC | Liberty Hill, TX 78642 | Oil & Gas Operator | Dec 2025 |
| 12121 | West Petroleum Corp. | San Antonio, TX 78205 | Oil & Gas Operator | Oct 2009 |
| 12122 | West Texas Diversified Interests | Eastland, TX 76448 | Oil & Gas Operator | Jun 2006 |
| 12123 | West Texas Exploration Co. | Graham, TX 76450 | Oil & Gas Operator | May 1996 |
| 12124 | West Texas Oil And Gas Corp. | Houston, TX 77056 | Oil & Gas Operator | Feb 2014 |
| 12125 | West Texas Oil And Gas Oper.,Inc | Houston, TX 77046 | Oil & Gas Operator | Jul 2024 |
| 12126 | West Texas Royalties, Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 12127 | West Texas Syndicate LLC. | Corpus Chrsti, TX 78414 | Oil Operator | Dec 2025 |
| 12128 | West Tuleta Operating Corp. | Tuleta, TX 78162 | Oil & Gas Operator | May 2019 |
| 12129 | West,Gordon T.Jr. & Rugeley,Stan | Wichita Falls, TX 76307 | Oil & Gas Operator | Apr 2019 |
| 12130 | West-States Energy, Inc. | Rimrock, AZ 86335 | Oil Operator | Dec 2025 |
| 12131 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 12132 | Westbrook Oil & Gas Co. Inc. | Gainesville, TX 76240 | Oil & Gas Operator | Dec 2025 |
| 12133 | Westco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Dec 2025 |
| 12134 | Westech Energy Corporation | Denver, CO 80237 | Oil & Gas Operator | Mar 2011 |
| 12135 | Westerly Exploration, Inc. | Houston, TX 77256 | Oil & Gas Operator | Dec 2025 |
| 12136 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 12137 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 12138 | Western Disposal Systems, Inc. | Corrales, NM 87048 | Oil Operator | Dec 2025 |
| 12139 | Western DRLG. Co. | Longview, TX 75604 | Oil & Gas Operator | Nov 1996 |
| 12140 | Western Energy Group, LLC | Leander, TX 78641 | Oil & Gas Operator | Dec 2025 |
| 12141 | Western Energy Management, Inc. | Austin, TX 78716 | Oil & Gas Operator | Aug 1997 |
| 12142 | Western Field Exploration, Inc. | Dilley, TX 78017 | Oil & Gas Operator | Dec 2025 |
| 12143 | Western Gas Resources Storage | Denver, CO 80234 | Oil & Gas Operator | Jun 1999 |
| 12144 | Western Global Oil, Inc | Deerfld Beach, FL 33442 | Oil Operator | Dec 2025 |
| 12145 | Western Gulf Oil & Gas Inc. | Dallas, TX 75360 | Oil & Gas Operator | Jul 2000 |
| 12146 | Western Gulf Oil & Gas, LLC | Bishop, TX 78343 | Oil & Gas Operator | Dec 2025 |
| 12147 | Western Natural Gas Company | Shelby, MT 59474 | Oil & Gas Operator | Jul 2025 |
| 12148 | Western Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2014 |
| 12149 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 12150 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 12151 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 12152 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 12153 | Western Pride Resources, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2011 |
| 12154 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 2025 |
| 12155 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 12156 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 12157 | Western Sky Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 12158 | Westgate Petroleum, Inc. | Fritch, TX 79036 | Oil & Gas Operator | Nov 2001 |
| 12159 | Westhall Associates, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 1997 |
| 12160 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 12161 | Westlake Energy Consultants Corp | Thousand Oaks, CA 91362 | Oil & Gas Operator | Aug 2003 |
| 12162 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 12163 | Westlands Resources Corporation | Monrovia, CA 91016 | Oil & Gas Operator | Dec 2025 |
| 12164 | Westneft LLC | Brooklyn, NY 11204 | Oil Operator | Dec 2025 |
| 12165 | Westoil LLC | Austin, TX 78747 | Oil & Gas Operator | Dec 2025 |
| 12166 | Westover Production Co., LLC | Kermit, TX 79745 | Oil & Gas Operator | Dec 2025 |
| 12167 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | Dec 2025 |
| 12168 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 12169 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 12170 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Dec 2025 |
| 12171 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 12172 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Sep 2025 |
| 12173 | Weststar Operating Company | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2015 |
| 12174 | Westwin Energy I, LP | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 12175 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 12176 | Wetwick DRLG. & Prod. | Carlsbad, TX 76934 | Oil Operator | Dec 2025 |
| 12177 | Wetzel Oil Company | Austin, TX 78738 | Oil & Gas Operator | May 2007 |
| 12178 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 12179 | WF Company, LTD. | Midland, TX 79705 | Oil & Gas Operator | Oct 1995 |
| 12180 | WFMMS, Inc. | Batson, TX 77519 | Oil & Gas Operator | Dec 2025 |
| 12181 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Dec 2025 |
| 12182 | WG Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 12183 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |
| 12184 | WGR, Inc. | Houston, TX 77046 | Gas Operator | Jul 2007 |
| 12185 | Wgsi Enterprise LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Dec 2025 |
| 12186 | Wharton Oil Co. | Vernon, TX 76384 | Oil & Gas Operator | Dec 2000 |
| 12187 | Whatley, O. B. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 1993 |
| 12188 | Whatley, O.B. Oil Company, Inc. | Bivins, TX 75555 | Oil & Gas Operator | Dec 2025 |
| 12189 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 12190 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Aug 2025 |
| 12191 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Dec 2025 |
| 12192 | Wheeler Oil Co. (A) | Amarillo, TX 79114 | Gas Operator | Apr 2001 |
| 12193 | Wheeler Operating Corporation | Fort Worth, TX 76109 | Oil & Gas Operator | Dec 2025 |
| 12194 | Whelan Brothers, Inc. | Oil City, LA 71061 | Oil & Gas Operator | May 2015 |
| 12195 | Whiskey River Oil & Gas LLC | Dallas, TX 75230 | Oil & Gas Operator | Apr 2024 |
| 12196 | Whitaker Properties, L. P. | Carthage, TX 75633 | Oil & Gas Operator | Sep 1997 |
| 12197 | Whitaker, Fred | Carthage, TX 75633 | Gas Operator | Mar 2001 |
| 12198 | Whitaker, Jerry | Sunset, TX 76270 | Oil & Gas Operator | May 2022 |
| 12199 | White Creek Energy | Three Rivers, TX 78071 | Oil & Gas Operator | Dec 2025 |
| 12200 | White Creek Energy, Inc. | San Antonio, TX 78246 | Oil & Gas Operator | Dec 2003 |