| 31201 | Western Interior Oil & Gas Corp | Casper, WY 82602 | Oil & Gas Operator | May 2015 |
| 31202 | Western Kansas E | | Oil Operator | Aug 1993 |
| 31203 | Western Meadowlark Resources LLC | Denver, CO 80206 | Oil & Gas Operator | Apr 2026 |
| 31204 | Western Metals Corporation | | Oil & Gas Operator | May 2026 |
| 31205 | Western Mountain Resources LLC | Cogan Station, PA 17728 | Oil & Gas Operator | Apr 2026 |
| 31206 | Western Natl Resource Expl LLC | Oklahoma City, OK 73154-0755 | Oil & Gas Operator | Mar 2015 |
| 31207 | Western Natural Gas | | Oil & Gas Operator | Aug 1974 |
| 31208 | Western Natural Gas Company | Shelby, MT 59474 | Oil & Gas Operator | Apr 2026 |
| 31209 | Western Natural Resources Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 31210 | Western New York Drilling Associates 1, L.P. | Buffalo, NY 14201 | Oil & Gas Operator | Dec 2025 |
| 31211 | Western New York Drilling Associates Joint Venture | Buffalo, NY 14201 | Oil & Gas Operator | Dec 2025 |
| 31212 | Western Oil & Gas Development Co. | Robinson, IL 62454 | Oil Operator | Jun 2000 |
| 31213 | Western Oil & Minerals LTD | Farmington, NM 874991228 | Oil & Gas Operator | May 2026 |
| 31214 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | May 2026 |
| 31215 | Western Oil Comp | | Oil Operator | Aug 1989 |
| 31216 | Western Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2014 |
| 31217 | Western Oil Independent LLC | | Oil & Gas Operator | Dec 2016 |
| 31218 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 31219 | Western Oil Refining Company | Kemmerrer, WY 83101 | Oil & Gas Operator | Dec 1994 |
| 31220 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Apr 2026 |
| 31221 | Western Pacific Farms, Inc. | Copeland, KS 67837 | Oil & Gas Operator | Apr 2020 |
| 31222 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 31223 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 31224 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Mar 2026 |
| 31225 | Western Pride Resources, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2011 |
| 31226 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2026 |
| 31227 | Western Products Corporation | Fairview, OK 73737 | Oil & Gas Operator | Nov 2004 |
| 31228 | Western Properti | | Oil Operator | Oct 1987 |
| 31229 | Western Reserve Exp | Perry, OH 44081 | Oil & Gas Operator | Dec 2003 |
| 31230 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 31231 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 31232 | Western Reserves Oil Co Inc And Sullivan And Co | | Oil & Gas Operator | Jul 2001 |
| 31233 | Western Resources And Clean Energy, LLC | Manti, UT 84642 | Oil & Gas Operator | Jun 2026 |
| 31234 | Western Resources, Inc. | | Oil Operator | Jun 1994 |
| 31235 | Western Resources{Wva}Inc | Chantilly, VA 22022 | Oil & Gas Operator | Dec 1994 |
| 31236 | Western Sky Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 31237 | Western States International Inc. | | Oil & Gas Operator | Dec 2025 |
| 31238 | Western Tank Trucks Inc | Hennessey, OK 73742 | Oil Operator | Jul 2011 |
| 31239 | Westfall-Gooden Reserves LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | May 2026 |
| 31240 | Westfield Energy Corp. | | Oil & Gas Operator | Mar 1991 |
| 31241 | Westgate Oil Com | | Oil Operator | Mar 1993 |
| 31242 | Westgate Oil Company, Inc. | Eureka, KS 67045 | Oil & Gas Operator | May 2026 |
| 31243 | Westgate Petroleum, Inc. | Fritch, TX 79036 | Oil & Gas Operator | Nov 2001 |
| 31244 | Westhall Associates, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 1997 |
| 31245 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 31246 | Westinghouse Elec Co LLC | | Gas Operator | Dec 2025 |
| 31247 | Westlake Energy Consultants Corp | Thousand Oaks, CA 91362 | Oil & Gas Operator | Aug 2003 |
| 31248 | Westlake Energy Consultants, Inc. | Westlake VIllage, CA 91362 | Gas Operator | Dec 2019 |
| 31249 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 31250 | Westlands Resources Corporation | Monrovia, CA 91016 | Oil & Gas Operator | Jul 2026 |
| 31251 | Westmore Drillin | | Oil & Gas Operator | Oct 1995 |
| 31252 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 31253 | Westmoreland Gas, LLC | | Oil & Gas Operator | Dec 2021 |
| 31254 | Westoil LLC | Austin, TX 78747 | Oil & Gas Operator | Jul 2026 |
| 31255 | Weston Management & Operations Group | Centreville, MD 21617 | Oil Operator | May 1997 |
| 31256 | Westover Production Co., LLC | Kermit, TX 79745 | Oil & Gas Operator | Jul 2026 |
| 31257 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | Jul 2026 |
| 31258 | Westphal Oil & Gas Inc | Fort Smith, AR 72901-2199 | Oil & Gas Operator | Feb 2015 |
| 31259 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 31260 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 31261 | Westport Oil Com | | Oil Operator | Feb 1994 |
| 31262 | Westport Petrole | | Oil Operator | Feb 1985 |
| 31263 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Jul 2026 |
| 31264 | Westshore Operating Inc | Naples, FL 34109-0549 | Oil & Gas Operator | Dec 2011 |
| 31265 | Westside Energy Op. Co., LP | Oklahoma City, OK 73142 | Oil & Gas Operator | Jun 2008 |
| 31266 | Westside Farming Co. Inc. | | Gas Operator | Dec 1995 |
| 31267 | Westside Wells Inc | Altus, OK 73521 | Oil & Gas Operator | Nov 2020 |
| 31268 | Weststar Exploration Co | Houston, TX 77027 | Oil & Gas Operator | Jan 2026 |
| 31269 | Weststar Oil & Gas Inc | Edmond, OK 73013 | Oil & Gas Operator | May 2026 |
| 31270 | Weststar Operating Company | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2015 |
| 31271 | Weststar Resourc | | Oil Operator | Sep 1992 |
| 31272 | Westwin Energy I, LP | Midland, TX 79701 | Oil & Gas Operator | Aug 2003 |
| 31273 | Westwind Exploration Company | Oklahoma City, OK 73123 | Oil & Gas Operator | Oct 1998 |
| 31274 | Westwood Energy, Inc. | Abilene, TX 79608 | Oil & Gas Operator | May 2013 |
| 31275 | Wetwick DRLG. & Prod. | Carlsbad, TX 76934 | Oil Operator | Jul 2026 |
| 31276 | Wetzel Oil Company | Austin, TX 78738 | Oil & Gas Operator | May 2007 |
| 31277 | Wetzel Producing Company | Duncan, OK 73533-4602 | Oil & Gas Operator | Apr 2026 |
| 31278 | Weva Oil Corp. | | Oil & Gas Operator | Nov 2019 |
| 31279 | Wexpro Company | Rock Springs, WY 82902-0458 | Oil & Gas Operator | May 2026 |
| 31280 | Wexpro Development Company | Salt Lake City, UT 84111 | Oil & Gas Operator | May 2026 |
| 31281 | Wexpro II Company | Salt Lake City, UT 84111 | Oil & Gas Operator | May 2026 |
| 31282 | Weyerhaeuser Company | Crossett, AR 71635 | Oil & Gas Operator | Sep 1994 |
| 31283 | WF Company, LTD. | Midland, TX 79705 | Oil & Gas Operator | Oct 1995 |
| 31284 | WF Operating LLC | Bartlesville, OK 74006 | Oil Operator | Apr 2026 |
| 31285 | WFMMS, Inc. | Batson, TX 77519 | Oil & Gas Operator | Jul 2026 |
| 31286 | WFW Production Company, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jul 2026 |
| 31287 | WG Oil & Gas LLC | Okmulgee, OK 74447-7862 | Oil & Gas Operator | Dec 2022 |
| 31288 | WG Oil, LLC | Wichita Falls, TX 76308 | Oil Operator | Jul 2026 |
| 31289 | WG Operating, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | May 2012 |
| 31290 | WGM Gas Co Inc | | Oil & Gas Operator | Dec 2025 |
| 31291 | Wgo Resources, LLC | | Oil & Gas Operator | May 2026 |
| 31292 | WGP-KHC, LLC | Houston, TX 77002 | Oil Operator | May 2017 |
| 31293 | WGR, Inc. | Houston, TX 77046 | Gas Operator | Jul 2007 |
| 31294 | Wgsi Enterprise LLC | Carrizo SPGS, TX 78834 | Oil & Gas Operator | Nov 2025 |
| 31295 | Wharton Oil Co. | Vernon, TX 76384 | Oil & Gas Operator | Dec 2000 |
| 31296 | Whatley, O. B. | Kilgore, TX 75662 | Oil & Gas Operator | Jun 1993 |
| 31297 | Whatley, O.B. Oil Company, Inc. | Bivins, TX 75555 | Oil & Gas Operator | Jul 2026 |
| 31298 | WHC Oper LLC | | Gas Operator | Dec 2025 |
| 31299 | Wheat, Buck Resources, Inc. | Eastland, TX 76448 | Oil & Gas Operator | Dec 2009 |
| 31300 | Wheatbelt Invest | | Oil Operator | Mar 1991 |