| 31301 | Westar Energy, Inc. | Midland, TX 79705 | Oil & Gas Operator | Mar 2008 |
| 31302 | Westar Oil & Minerals | | Oil Operator | Feb 1999 |
| 31303 | Westbrook Oil & Gas Co. Inc. | Gainesville, TX 76240 | Oil & Gas Operator | Nov 2024 |
| 31304 | Westbrook Oil Corp | Jal, NM 88252 | Oil & Gas Operator | May 2018 |
| 31305 | Westburne Petroleum Inc | | Oil Operator | Jun 1990 |
| 31306 | Westco Oil Company | Ozona, TX 76943 | Oil & Gas Operator | Nov 2024 |
| 31307 | Westech Energy C | | Oil & Gas Operator | Dec 1996 |
| 31308 | Westech Energy Corporation | Denver, CO 80237 | Oil & Gas Operator | Mar 2011 |
| 31309 | Westend Operating LLC | Collinsville, OK 74021 | Oil Operator | Aug 2024 |
| 31310 | Westerly Exploration, Inc. | Houston, TX 77256 | Oil & Gas Operator | Nov 2024 |
| 31311 | Western Alliance Petroleum | | Oil & Gas Operator | Dec 1987 |
| 31312 | Western American Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jun 2024 |
| 31313 | Western Avenue Properties | | Oil & Gas Operator | Dec 1993 |
| 31314 | Western Chief Oil & Gas Company | Graham, TX 76450 | Oil & Gas Operator | Jul 2009 |
| 31315 | Western Chief Operating, L.L.C. | Graham, TX 76450 | Oil & Gas Operator | Nov 2024 |
| 31316 | Western Continental Operating Company | | Oil & Gas Operator | Dec 2007 |
| 31317 | Western Discovery USA Inc. | | Oil & Gas Operator | Jan 2018 |
| 31318 | Western Disposal Systems, Inc. | Corrales, NM 87048 | Oil Operator | Nov 2024 |
| 31319 | Western Division Investments Inc | Enid, OK 73701 | Oil & Gas Operator | Jul 2021 |
| 31320 | Western DRLG. Co. | Longview, TX 75604 | Oil & Gas Operator | Nov 1996 |
| 31321 | Western Energy Group, LLC | Leander, TX 78641 | Oil & Gas Operator | Nov 2024 |
| 31322 | Western Energy Management, Inc. | Austin, TX 78716 | Oil & Gas Operator | Aug 1997 |
| 31323 | Western Engineering, Inc. | | Oil Operator | Dec 1998 |
| 31324 | Western Exploration, Inc. | | Oil Operator | May 1984 |
| 31325 | Western Farmers Electric Coop | Anadarko, OK 73005-0429 | Oil & Gas Operator | Apr 2012 |
| 31326 | Western Field Exploration, Inc. | Dilley, TX 78017 | Oil & Gas Operator | Nov 2024 |
| 31327 | Western Frontier Adventure, LLC | Easton, KS 66020 | Oil Operator | Dec 2019 |
| 31328 | Western Fuel & S | | Oil Operator | Oct 1987 |
| 31329 | Western Gas Resources Inc | Denver, CO 80202-1955 | Oil & Gas Operator | Dec 2007 |
| 31330 | Western Gas Resources Storage | Denver, CO 80234 | Oil & Gas Operator | Jun 1999 |
| 31331 | Western Gas Resources-Sand Wash Inc | | Oil & Gas Operator | Feb 2008 |
| 31332 | Western Global Oil, Inc | Deerfld Beach, FL 33442 | Oil Operator | Nov 2024 |
| 31333 | Western Gulf Oil & Gas Inc. | Dallas, TX 75360 | Oil & Gas Operator | Jul 2000 |
| 31334 | Western Gulf Oil & Gas, LLC | Bishop, TX 78343 | Oil & Gas Operator | Nov 2024 |
| 31335 | Western Hemisphere Group | Buffalo, NY 14218 | Oil & Gas Operator | Dec 1993 |
| 31336 | Western Interior Energy Inc. | Denver, CO 80202 | Oil & Gas Operator | Jul 2020 |
| 31337 | Western Interior Oil & Gas Corp | Casper, WY 82602 | Oil & Gas Operator | May 2015 |
| 31338 | Western Kansas E | | Oil Operator | Aug 1993 |
| 31339 | Western Meadowlark Resources LLC | Denver, CO 80206 | Oil & Gas Operator | Aug 2024 |
| 31340 | Western Metals Corporation | | Oil & Gas Operator | Sep 2024 |
| 31341 | Western Mountain Resources LLC | Cogan Station, PA 17728 | Oil & Gas Operator | Aug 2024 |
| 31342 | Western Natl Resource Expl LLC | Oklahoma City, OK 73154-0755 | Oil & Gas Operator | Mar 2015 |
| 31343 | Western Natural Gas | | Oil & Gas Operator | Aug 1974 |
| 31344 | Western Natural Gas Company | Shelby, MT 59474 | Oil & Gas Operator | Jul 2024 |
| 31345 | Western Natural Resources Inc | Oklahoma City, OK 73116 | Oil & Gas Operator | Apr 2015 |
| 31346 | Western New York Drilling Associates 1, L.P. | Buffalo, NY 14201 | Oil & Gas Operator | Dec 2023 |
| 31347 | Western New York Drilling Associates Joint Venture | Buffalo, NY 14201 | Oil & Gas Operator | Dec 2023 |
| 31348 | Western Oil & Gas Development Co. | Robinson, IL 62454 | Oil Operator | Jun 2000 |
| 31349 | Western Oil & Minerals LTD | Farmington, NM 874991228 | Oil & Gas Operator | Sep 2024 |
| 31350 | Western Oil And Gas Development Corp | Oklahoma City, OK 73103-3735 | Oil & Gas Operator | Sep 2024 |
| 31351 | Western Oil Comp | | Oil Operator | Aug 1989 |
| 31352 | Western Oil Company | Midland, TX 79702 | Oil & Gas Operator | Jul 2014 |
| 31353 | Western Oil Independent LLC | | Oil & Gas Operator | Dec 2016 |
| 31354 | Western Oil Producers Inc | Roswell, NM 88202 | Oil & Gas Operator | Jul 2005 |
| 31355 | Western Oil Refining Company | Kemmerrer, WY 83101 | Oil & Gas Operator | Dec 1994 |
| 31356 | Western Operating Company | Denver, CO 80204 | Oil & Gas Operator | Aug 2024 |
| 31357 | Western Pacific Farms, Inc. | Copeland, KS 67837 | Oil & Gas Operator | Apr 2020 |
| 31358 | Western Petroleum Company Inc | Tulsa, OK 74170-2676 | Oil & Gas Operator | Apr 2020 |
| 31359 | Western Petroleum Resources, Inc | Dallas, TX 75219 | Oil & Gas Operator | May 2021 |
| 31360 | Western Plains Resources LLC | Garden City, KS 67846 | Oil & Gas Operator | Jul 2024 |
| 31361 | Western Pride Resources, Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jan 2011 |
| 31362 | Western Production Company | Fort Worth, TX 76102 | Oil & Gas Operator | Nov 2024 |
| 31363 | Western Products Corporation | Fairview, OK 73737 | Oil & Gas Operator | Nov 2004 |
| 31364 | Western Properti | | Oil Operator | Oct 1987 |
| 31365 | Western Reserve Exp | Perry, OH 44081 | Oil & Gas Operator | Dec 2003 |
| 31366 | Western Reserves Corporation | Abilene, TX 79608 | Oil & Gas Operator | Jan 2008 |
| 31367 | Western Reserves Oil Co Inc | Midland, TX 79705 | Oil & Gas Operator | Oct 2020 |
| 31368 | Western Reserves Oil Co Inc And Sullivan And Co | | Oil & Gas Operator | Jul 2001 |
| 31369 | Western Resources And Clean Energy, LLC | Manti, UT 84642 | Oil & Gas Operator | Apr 2024 |
| 31370 | Western Resources, Inc. | | Oil Operator | Jun 1994 |
| 31371 | Western Resources{Wva}Inc | Chantilly, VA 22022-595-595 | Oil & Gas Operator | Dec 1994 |
| 31372 | Western Sky Oil & Gas | Abilene, TX 79604 | Oil & Gas Operator | Aug 2003 |
| 31373 | Western States International Inc. | | Oil & Gas Operator | Aug 2024 |
| 31374 | Western Tank Trucks Inc | Hennessey, OK 73742 | Oil Operator | Jul 2011 |
| 31375 | Westfall-Gooden Reserves LLC | Oklahoma City, OK 73106 | Oil & Gas Operator | Sep 2024 |
| 31376 | Westfield Energy Corp. | | Oil & Gas Operator | Mar 1991 |
| 31377 | Westgate Oil Com | | Oil Operator | Mar 1993 |
| 31378 | Westgate Oil Company, Inc. | Eureka, KS 67045 | Oil Operator | Sep 2024 |
| 31379 | Westgate Petroleum, Inc. | Fritch, TX 79036 | Oil & Gas Operator | Nov 2001 |
| 31380 | Westhall Associates, Inc. | Corpus Chrsti, TX 78477 | Oil & Gas Operator | Aug 1997 |
| 31381 | Westico Energy Co. | Abilene, TX 79605 | Oil & Gas Operator | Nov 2004 |
| 31382 | Westinghouse Elec Co LLC | Monroeville, PA 15146-2808 | Gas Operator | Dec 2023 |
| 31383 | Westlake Energy Consultants Corp | Thousand Oaks, CA 91362 | Oil & Gas Operator | Aug 2003 |
| 31384 | Westlake Energy Consultants, Inc. | Westlake VIllage, CA 91362 | Gas Operator | Dec 2019 |
| 31385 | Westland Oil Development Corp. | Conroe, TX 77305 | Oil & Gas Operator | Mar 2008 |
| 31386 | Westlands Resources Corporation | Monrovia, CA 91016 | Oil & Gas Operator | Nov 2024 |
| 31387 | Westmore Drillin | | Oil & Gas Operator | Oct 1995 |
| 31388 | Westmore Drilling Company, Inc. | Lawrence, KS 66047 | Oil & Gas Operator | Dec 2019 |
| 31389 | Westmoreland Gas, LLC | | Oil & Gas Operator | Dec 2021 |
| 31390 | Westoil LLC | Austin, TX 78747 | Oil & Gas Operator | Nov 2024 |
| 31391 | Weston Management & Operations Group | Centreville, MD 21617 | Oil Operator | May 1997 |
| 31392 | Westover Production Co., LLC | Kermit, TX 79745 | Oil & Gas Operator | Nov 2024 |
| 31393 | Westpark Petroleum, Inc. | Austin, TX 78755 | Oil & Gas Operator | Nov 2024 |
| 31394 | Westphal Oil & Gas Inc | Fort Smith, AR 72901-2199 | Oil & Gas Operator | Feb 2015 |
| 31395 | Westport Oil & Gas Company LP | The Woodlands, TX 77380 | Oil & Gas Operator | Feb 2007 |
| 31396 | Westport Oil And Gas Company Inc | Denver, CO 80202 | Oil & Gas Operator | Feb 2002 |
| 31397 | Westport Oil Com | | Oil Operator | Feb 1994 |
| 31398 | Westport Petrole | | Oil Operator | Feb 1985 |
| 31399 | Westridge Oil & Gas Properties | Mineral Wells, TX 76068 | Oil & Gas Operator | Nov 2024 |
| 31400 | Westshore Operating Inc | Naples, FL 34109-0549 | Oil & Gas Operator | Dec 2011 |