| 31101 | Western Natural Resources Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 31102 | Western New York Drilling Associates 1, L.P. | Buffalo, NY 14201 | Oil & Gas Operator | Dec 2025 |
| 31103 | Western New York Drilling Associates Joint Venture | Buffalo, NY 14201 | Oil & Gas Operator | Dec 2025 |
| 31104 | Western Oil & Gas Development Co. | Robinson, IL 62454 | Oil Operator | Jun 2000 |
| 31105 | Western Oil & Minerals LTD | Farmington, NM 874991228 | Oil & Gas Operator | Jul 2026 |
| 31106 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Jun 2026 |
| 31107 | Western Oil Comp | | Oil Operator | Aug 1989 |
| 31108 | Western Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2014 |
| 31109 | Western Oil Independent LLC | | Oil & Gas Operator | Dec 2016 |
| 31110 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 31111 | Western Oil Refining Company | Kemmerrer, WY 83101 | Oil & Gas Operator | Dec 1994 |
| 31112 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Apr 2026 |
| 31113 | Western Pacific Farms, Inc. | Copeland, KS 67837 | Oil & Gas Operator | Apr 2020 |
| 31114 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 31115 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 31116 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Apr 2026 |
| 31117 | Western Pride Resources, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2011 |
| 31118 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Sep 2026 |
| 31119 | Western Products Corporation | Fairview, OK 73737 | Oil & Gas Operator | Nov 2004 |
| 31120 | Western Properti | | Oil Operator | Oct 1987 |
| 31121 | Western Reserve Exp | Perry, OH 44081 | Oil & Gas Operator | Dec 2003 |
| 31122 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 31123 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 31124 | Western Reserves Oil Co Inc And Sullivan And Co | | Oil & Gas Operator | Jul 2001 |
| 31125 | Western Resources And Clean Energy, LLC | Manti, UT 84642 | Oil & Gas Operator | Jul 2026 |
| 31126 | Western Resources, Inc. | | Oil Operator | Jun 1994 |
| 31127 | Western Resources{Wva}Inc | Chantilly, VA 22022 | Oil & Gas Operator | Dec 1994 |
| 31128 | Western Sky Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 31129 | Western States International Inc. | | Oil & Gas Operator | Dec 2025 |
| 31130 | Western Tank Trucks Inc | Hennessey, OK 73742 | Oil Operator | Jul 2011 |
| 31131 | Westfall-Gooden Reserves LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Jun 2026 |
| 31132 | Westfield Energy Corp. | | Oil & Gas Operator | Mar 1991 |
| 31133 | Westgate Oil Com | | Oil Operator | Mar 1993 |
| 31134 | Westgate Oil Company, Inc. | Eureka, KS 67045 | Oil & Gas Operator | May 2026 |
| 31135 | Westgate Petroleum, Inc. | Fritch, TX 79036 | Oil & Gas Operator | Nov 2001 |
| 31136 | Westhall Associates, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 1997 |
| 31137 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 31138 | Westinghouse Elec Co LLC | | Gas Operator | Dec 2025 |
| 31139 | Westlake Energy Consultants Corp | Thousand Oaks, CA 91362 | Oil & Gas Operator | Aug 2003 |
| 31140 | Westlake Energy Consultants, Inc. | Westlake VIllage, CA 91362 | Gas Operator | Dec 2019 |
| 31141 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 31142 | Westlands Resources Corporation | Monrovia, CA 91016 | Oil & Gas Operator | Sep 2026 |
| 31143 | Westmore Drillin | | Oil & Gas Operator | Oct 1995 |
| 31144 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 31145 | Westmoreland Gas, LLC | Weston, WV 26452 | Oil & Gas Operator | Dec 2021 |
| 31146 | Westoil LLC | Austin, TX 78747 | Oil & Gas Operator | Sep 2026 |
| 31147 | Weston Management & Operations Group | Centreville, MD 21617 | Oil Operator | May 1997 |
| 31148 | Westover Production Co., LLC | Kermit, TX 79745 | Oil & Gas Operator | Sep 2026 |
| 31149 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | Sep 2026 |
| 31150 | Westphal Oil & Gas Inc | Fort Smith, AR 72901-2199 | Oil & Gas Operator | Feb 2015 |
| 31151 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 31152 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 31153 | Westport Oil Com | | Oil Operator | Feb 1994 |
| 31154 | Westport Petrole | | Oil Operator | Feb 1985 |
| 31155 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Sep 2026 |
| 31156 | Westshore Operating Inc | Naples, FL 34109-0549 | Oil & Gas Operator | Dec 2011 |
| 31157 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 31158 | Westside Farming Co. Inc. | | Gas Operator | Dec 1995 |
| 31159 | Westside Wells Inc | Altus, OK 73521 | Oil & Gas Operator | Nov 2020 |
| 31160 | Weststar Exploration Co | Houston, TX 77027 | Oil & Gas Operator | Jan 2026 |
| 31161 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | Jun 2026 |
| 31162 | Weststar Operating Company | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2015 |
| 31163 | Weststar Resourc | | Oil Operator | Sep 1992 |
| 31164 | Westwin Energy I, LP | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 31165 | Westwind Exploration Company | Oklahoma City, OK 73123 | Oil & Gas Operator | Oct 1998 |
| 31166 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 31167 | Wetwick DRLG. & Prod. | Carlsbad, TX 76934 | Oil Operator | Sep 2026 |
| 31168 | Wetzel Oil Company | Austin, TX 78738 | Oil & Gas Operator | May 2007 |
| 31169 | Wetzel Producing Company | Duncan, OK 73533-4602 | Oil & Gas Operator | May 2026 |
| 31170 | Weva Oil Corp. | | Oil & Gas Operator | Nov 2019 |
| 31171 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | Jun 2026 |
| 31172 | Wexpro Development Company | Salt Lake City, UT 84111 | Oil & Gas Operator | May 2026 |
| 31173 | Wexpro II Company | Salt Lake City, UT 84111 | Oil & Gas Operator | Jun 2026 |
| 31174 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 31175 | WF Company, LTD. | Midland, TX 79705 | Oil & Gas Operator | Oct 1995 |
| 31176 | WF Operating LLC | Bartlesville, OK 74006 | Oil Operator | May 2026 |
| 31177 | WFMMS, Inc. | Batson, TX 77519 | Oil & Gas Operator | Sep 2026 |
| 31178 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Sep 2026 |
| 31179 | WG Oil & Gas LLC | Okmulgee, OK 74447-7862 | Oil & Gas Operator | Dec 2022 |
| 31180 | WG Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Sep 2026 |
| 31181 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |
| 31182 | WGM Gas Co Inc | | Oil & Gas Operator | Dec 2025 |
| 31183 | Wgo Resources, LLC | | Oil & Gas Operator | Jun 2026 |
| 31184 | WGP-KHC, LLC | Houston, TX 77002 | Oil Operator | May 2017 |
| 31185 | WGR, Inc. | Houston, TX 77046 | Gas Operator | Jul 2007 |
| 31186 | Wharton Oil Co. | Vernon, TX 76384 | Oil & Gas Operator | Dec 2000 |
| 31187 | Whatley, O. B. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 1993 |
| 31188 | Whatley, O.B. Oil Company, Inc. | Bivins, TX 75555 | Oil & Gas Operator | Sep 2026 |
| 31189 | WHC Oper LLC | | Gas Operator | Dec 2025 |
| 31190 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 31191 | Wheatbelt Invest | | Oil Operator | Mar 1991 |
| 31192 | Wheatland Oil & | | Oil & Gas Operator | Aug 1984 |
| 31193 | Wheatland Oil Inc | Enid, OK 73702-1032 | Oil & Gas Operator | Mar 2015 |
| 31194 | Wheeler & Hanlin MFG Co Inc | Tulsa, OK 74148 | Oil Operator | Jun 1998 |
| 31195 | Wheeler Energy Co. | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2026 |
| 31196 | Wheeler Energy, LLC | Tulsa, OK 74101 | Oil & Gas Operator | Sep 2026 |
| 31197 | Wheeler Michael D | Newark, OH 43055 | Oil & Gas Operator | Dec 2025 |
| 31198 | Wheeler Oil & Gas Inc | Tulsa, OK 74103-4293 | Oil & Gas Operator | Jan 2007 |
| 31199 | Wheeler Oil Co. (A) | Amarillo, TX 79114 | Gas Operator | Apr 2001 |
| 31200 | Wheeler Oil Company | Sperry, OK 74073-9417 | Oil & Gas Operator | Apr 2026 |