| 1201 | Windmill Oil Company | Austin, TX 78747 | Oil & Gas Operator | Mar 2008 |
| 1202 | Windmill Windy Acres Farm, LLC | Penn Yan, NY 14527 | Gas Operator | Dec 2023 |
| 1203 | Window Operating Co., The | Coleman, TX 76834 | Oil & Gas Operator | Jun 2025 |
| 1204 | Windridge Operating LLC | | Oil & Gas Operator | Apr 2025 |
| 1205 | Windrush Operating Co., L.L.C. | Longville, LA 70652 | Oil & Gas Operator | Jun 2025 |
| 1206 | Windrush Operating Company | | Oil & Gas Operator | Jan 2009 |
| 1207 | Winds Exploration And Production, LLC | Houston, TX 77032 | Gas Operator | Jan 2024 |
| 1208 | Windsor Associates Inc | Fairlawn, OH 44333-4006-4006 | Oil & Gas Operator | Dec 2012 |
| 1209 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 1210 | Windsor Energy Inc | Dallas, TX 75204-3199 | Oil & Gas Operator | May 2006 |
| 1211 | Windsor Exploration Company | Dallas, TX 75204 | Oil & Gas Operator | Jan 1994 |
| 1212 | Windsor Gas Corporation | | Oil & Gas Operator | Aug 1989 |
| 1213 | Windsor Permian LLC | Midland, TX 79701 | Oil & Gas Operator | Jun 2012 |
| 1214 | Windward Development LLC | Tulsa, OK 74136-7007 | Oil & Gas Operator | Jul 2019 |
| 1215 | Windy Cove Energy II, LLC | Houston, TX 77079 | Oil & Gas Operator | Sep 2020 |
| 1216 | Wineinger Dickie L Dba Royal Petroleum Co | Iowa Park, TX 76367 | Oil Operator | Nov 2022 |
| 1217 | Wineland Oil - LLC | Hays, KS 67601 | Oil Operator | Feb 2025 |
| 1218 | Wineridge Inc. | Austin, TX 78747 | Oil Operator | Jun 2025 |
| 1219 | Winfall Energy Inc N V | Vandergrift, PA 15690-2001 | Oil & Gas Operator | Dec 2019 |
| 1220 | Winfield Operating Company | Dallas, TX 75214 | Oil & Gas Operator | Jun 2025 |
| 1221 | Winfrey Oil Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2016 |
| 1222 | Wing Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2000 |
| 1223 | Wingrove Operating, LLC | Odessa, TX 79760 | Oil Operator | Jun 2025 |
| 1224 | Wingrove Well Service, Inc. | Lueders, TX 79533 | Oil & Gas Operator | Nov 2023 |
| 1225 | Winkler L W & Son | Denver, CO 80222 | Oil & Gas Operator | Dec 2001 |
| 1226 | Winn Exploration Co., Inc. | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Jun 2025 |
| 1227 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 1228 | Winney Construction Company | Forks, WA 98331-0801 | Oil & Gas Operator | Jan 2013 |
| 1229 | Winona Oil & Gas | | Oil & Gas Operator | Sep 1996 |
| 1230 | Winright Resources Operating,LLC | Houston, TX 77007 | Oil & Gas Operator | Jun 2025 |
| 1231 | Winslow Operating Company, LLC | Austin, TX 78737 | Oil & Gas Operator | Jun 2025 |
| 1232 | Winslow Resources Inc | | Oil & Gas Operator | May 2002 |
| 1233 | Winslow, Harry C. | San Antonio, TX 78217 | Oil & Gas Operator | Jun 2025 |
| 1234 | Winston Land & Cattle Co., Inc. | Lufkin, TX 75901 | Oil & Gas Operator | Feb 2001 |
| 1235 | Winston Land & Cattle I, LTD. | Lufkin, TX 75902 | Oil & Gas Operator | Nov 2014 |
| 1236 | Winston Oil Co | Marietta, OH 45750-754-754 | Oil & Gas Operator | Mar 2025 |
| 1237 | Winter Ridge Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2011 |
| 1238 | Winter'S Railroad Service, Inc | North Collins, NY 14111 | Gas Operator | Dec 2023 |
| 1239 | Winter, Marvin J. | North Collins, NY 14111 | Gas Operator | Dec 2023 |
| 1240 | Winterfield Corp | | Oil Operator | Nov 2024 |
| 1241 | Winterscheid Oil, LLC | Olpe, KS 66865 | Oil Operator | Dec 2019 |
| 1242 | Wintershall Corporation | | Oil & Gas Operator | Oct 1989 |
| 1243 | Wintershall Oil | | Oil Operator | Sep 1985 |
| 1244 | Wintershall Oil & Gas Co | | Oil & Gas Operator | Feb 1980 |
| 1245 | Wintershall Oil & Gas Corp | Houston, TX 77027 | Oil & Gas Operator | Jul 1989 |
| 1246 | Winwell, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2007 |
| 1247 | Winzeler Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2013 |
| 1248 | Wirtz Oil, LLC | Ellinwood, KS 67526 | Oil & Gas Operator | Feb 2025 |
| 1249 | Wischkaemper, James K. | Shamrock, TX 79079 | Oil & Gas Operator | Aug 2023 |
| 1250 | Wischkaemper, Kenneth | Shamrock, TX 79079 | Oil & Gas Operator | Jun 2025 |
| 1251 | Wise Exploration | Perrin, TX 76486 | Oil & Gas Operator | Jun 2025 |
| 1252 | Wise James W | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 1996 |
| 1253 | Wise Oil & Gas Company LLC | Shawnee, OK 74801-8507 | Oil & Gas Operator | Feb 2024 |
| 1254 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | Jun 2025 |
| 1255 | Wise Star Energy, LLC | Port Aransas, TX 78373 | Oil & Gas Operator | Jun 2025 |
| 1256 | Wise Supply Company | Bowie, TX 76230 | Oil & Gas Operator | Jun 2025 |
| 1257 | Wise Well Service | Bowie, TX 76230 | Oil & Gas Operator | Jul 2017 |
| 1258 | Wise* Wayne L | | Oil & Gas Operator | Dec 2023 |
| 1259 | Wise, Rodney J. | Anna, OH 45302 | Oil Operator | Jul 2011 |
| 1260 | Wiseman, B. W., Jr. | Midland, TX 79702 | Oil & Gas Operator | Dec 2002 |
| 1261 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 1262 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 1263 | Wishbone Oil & Gas | Noble, OK 73068 | Oil & Gas Operator | Mar 2007 |
| 1264 | Wishbone Texas Operating Co LLC | Houston, TX 77064 | Oil & Gas Operator | Jul 2019 |
| 1265 | Wisley Robert | | Oil & Gas Operator | Dec 1994 |
| 1266 | Wistrom | | Oil Operator | Aug 2019 |
| 1267 | Witco Corporation | Newark, OH 43055 | Oil & Gas Operator | Dec 1995 |
| 1268 | Witcraft, Jimmy D. | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 1987 |
| 1269 | Withers, Lawrence | Copeland, KS 67837 | Gas Operator | Nov 1996 |
| 1270 | Witherspoon Joe A | Bells, TX 75414 | Oil Operator | Aug 2024 |
| 1271 | Witherspoon Oil Co | Iowa Park, TX 76367 | Oil & Gas Operator | Jun 2025 |
| 1272 | Withrow Engineering, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2000 |
| 1273 | Withrow Oil Company Inc | Yukon, OK 73099-7712 | Oil & Gas Operator | Apr 2021 |
| 1274 | Witkowski, Dave | Hamburg, NY 14075 | Oil & Gas Operator | Dec 2023 |
| 1275 | Witlicki Richard | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2015 |
| 1276 | Witt Oil Production, Inc. | | Oil & Gas Operator | Nov 1984 |
| 1277 | Witter, Terry L. | Alma, NY 14708 | Oil Operator | Dec 2023 |
| 1278 | Wittmeyer, Richard J.& Cynthia L. | Springville, NY 14141 | Gas Operator | Dec 2023 |
| 1279 | Witty Thomas E | Enid, OK 73703 | Oil & Gas Operator | Mar 2008 |
| 1280 | Witzel, Robert R. | Dansville, NY 14437 | Gas Operator | Dec 2023 |
| 1281 | Wixson R J Compa | | Oil Operator | Jan 1989 |
| 1282 | Wixson, R. J., Co. | Wichita, KS 67278 | Oil Operator | Oct 2002 |
| 1283 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Jun 2025 |
| 1284 | WJH Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Jun 2025 |
| 1285 | WJM Oil Inc | Shawnee, OK 74804-3203 | Oil & Gas Operator | Jan 2013 |
| 1286 | WJR Production LLC | Fort Worth, TX 76177 | Oil Operator | Jun 2025 |
| 1287 | WJW Operating Co.,LLC | Austin, TX 78738 | Oil & Gas Operator | May 2002 |
| 1288 | Wle, Inc. | | Oil & Gas Operator | Feb 2012 |
| 1289 | WLH Production LLC | Gainesville, TX 76240 | Oil Operator | Jun 2025 |
| 1290 | WLP Oil Inc | Gillette, WY 82717 | Oil & Gas Operator | Dec 2018 |
| 1291 | WLS Corporation | | Oil Operator | Aug 2009 |
| 1292 | WLS, Inc | | Oil & Gas Operator | Nov 2024 |
| 1293 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Mar 2025 |
| 1294 | WM B Hill Production Co | | Oil Operator | Jun 1991 |
| 1295 | WM Bret Hall Energy LLC | Ratliff City, OK 73481 | Oil Operator | Feb 2025 |
| 1296 | WM Energy LLC | Asher, OK 74826 | Oil & Gas Operator | Feb 2025 |
| 1297 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 1298 | WM Oil & Gas Inc | Canton, OH 44721 | Oil & Gas Operator | Dec 2018 |
| 1299 | WM Wild Wolf Production LLC | Albany, TX 76430 | Oil Operator | Jun 2025 |
| 1300 | WM. H. Brayton Trust | | Oil & Gas Operator | Dec 2000 |