| 1201 | Winfrey Oil Co., Inc. | Wichita Falls, TX 76308 | Oil & Gas Operator | May 2016 |
| 1202 | Wing Corporation | Houston, TX 77002 | Oil & Gas Operator | Jun 2000 |
| 1203 | Wingrove Operating, LLC | Odessa, TX 79760 | Oil Operator | Sep 2026 |
| 1204 | Wingrove Well Service, Inc. | Lueders, TX 79533 | Oil & Gas Operator | Nov 2023 |
| 1205 | Winkler L W & Son | Denver, CO 80222 | Oil & Gas Operator | Dec 2001 |
| 1206 | Winn Exploration Co., Inc. | Corpus Christ, TX 78401 | Oil & Gas Operator | Sep 2026 |
| 1207 | Winn Operating, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 1208 | Winney Construction Company | Forks, WA 98331-0801 | Oil & Gas Operator | Jan 2013 |
| 1209 | Winona Oil & Gas | | Oil & Gas Operator | Sep 1996 |
| 1210 | Winright Resources Operating,LLC | Houston, TX 77007 | Oil & Gas Operator | Sep 2026 |
| 1211 | Winslow Operating Company, LLC | Austin, TX 78737 | Oil & Gas Operator | Sep 2026 |
| 1212 | Winslow, Harry C. | San Antonio, TX 78217 | Oil & Gas Operator | Sep 2026 |
| 1213 | Winston Land & Cattle Co., Inc. | Lufkin, TX 75901 | Oil & Gas Operator | Feb 2001 |
| 1214 | Winston Land & Cattle I, LTD. | Lufkin, TX 75902 | Oil & Gas Operator | Nov 2014 |
| 1215 | Winston Oil Co | Marietta, OH 45750 | Oil & Gas Operator | Apr 2026 |
| 1216 | Winter Ridge Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2011 |
| 1217 | Winter'S Railroad Service, Inc | North Collins, NY 14111 | Gas Operator | Dec 2025 |
| 1218 | Winter, Marvin J. | North Collins, NY 14111 | Gas Operator | Dec 2025 |
| 1219 | Winterfield Corp | | Oil Operator | Nov 2024 |
| 1220 | Winterscheid Oil, LLC | Olpe, KS 66865 | Oil Operator | Dec 2019 |
| 1221 | Wintershall Corporation | | Oil & Gas Operator | Oct 1989 |
| 1222 | Wintershall Oil | | Oil Operator | Sep 1985 |
| 1223 | Wintershall Oil & Gas Co | | Oil & Gas Operator | Feb 1980 |
| 1224 | Wintershall Oil & Gas Corp | Houston, TX 77027 | Oil & Gas Operator | Jul 1989 |
| 1225 | Winwell, L.L.C. | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2007 |
| 1226 | Winzeler Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2013 |
| 1227 | Wirtz Oil, LLC | Ellinwood, KS 67526 | Oil & Gas Operator | Apr 2026 |
| 1228 | Wischkaemper, James K. | Shamrock, TX 79079 | Oil & Gas Operator | Aug 2023 |
| 1229 | Wischkaemper, Kenneth | Shamrock, TX 79079 | Oil & Gas Operator | Sep 2026 |
| 1230 | Wise Exploration | Perrin, TX 76486 | Oil & Gas Operator | Sep 2026 |
| 1231 | Wise James W | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 1996 |
| 1232 | Wise Oil & Gas Company LLC | Shawnee, OK 74801-8507 | Oil & Gas Operator | Feb 2024 |
| 1233 | Wise Production Company | Bowie, TX 76230 | Oil & Gas Operator | Sep 2026 |
| 1234 | Wise Star Energy, LLC | Rockport, TX 78382 | Oil & Gas Operator | Sep 2026 |
| 1235 | Wise Supply Company | Bowie, TX 76230 | Oil & Gas Operator | Sep 2026 |
| 1236 | Wise Well Service | Bowie, TX 76230 | Oil & Gas Operator | Jul 2017 |
| 1237 | Wise* Wayne L | | Oil & Gas Operator | Dec 2023 |
| 1238 | Wise, Rodney J. | Anna, OH 45302 | Oil Operator | Jul 2011 |
| 1239 | Wiseman, B. W., Jr. | Midland, TX 79702 | Oil & Gas Operator | Dec 2002 |
| 1240 | Wisenbaker Production Company | Tyler, TX 75702 | Oil & Gas Operator | Oct 2011 |
| 1241 | Wiser Oil Co | Denver, CO 80202 | Oil & Gas Operator | Dec 2023 |
| 1242 | Wishbone Oil & Gas | Noble, OK 73068 | Oil & Gas Operator | Mar 2007 |
| 1243 | Wishbone Texas Operating Co LLC | Houston, TX 77064 | Oil & Gas Operator | Jul 2019 |
| 1244 | Wisley Robert | | Oil & Gas Operator | Dec 1994 |
| 1245 | Wistrom | | Oil Operator | Aug 2019 |
| 1246 | Witco Corporation | Newark, OH 43055 | Oil & Gas Operator | Dec 1995 |
| 1247 | Witcraft, Jimmy D. | Pawhuska, OK 74056 | Oil & Gas Operator | Jun 1987 |
| 1248 | Witherspoon Joe A | Bells, TX 75414 | Oil Operator | Mar 2026 |
| 1249 | Witherspoon Oil Co | Iowa Park, TX 76367 | Oil & Gas Operator | Sep 2026 |
| 1250 | Withrow Engineering, Inc. | Richardson, TX 75080 | Oil & Gas Operator | Mar 2000 |
| 1251 | Withrow Oil Company Inc | Yukon, OK 73099-7712 | Oil & Gas Operator | Apr 2021 |
| 1252 | Witkowski, Dave | Hamburg, NY 14075 | Gas Operator | Dec 2025 |
| 1253 | Witlicki Richard | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2015 |
| 1254 | Witt Oil Production, Inc. | | Oil & Gas Operator | Nov 1984 |
| 1255 | Witter, Terry L. | Alma, NY 14708 | Oil Operator | Dec 2025 |
| 1256 | Wittmeyer, Richard J.& Cynthia L. | Springville, NY 14141 | Gas Operator | Dec 2025 |
| 1257 | Witty Thomas E | Enid, OK 73703 | Oil & Gas Operator | Mar 2008 |
| 1258 | Witzel, Robert R. | Dansville, NY 14437 | Gas Operator | Dec 2025 |
| 1259 | Wixson R J Compa | | Oil Operator | Jan 1989 |
| 1260 | Wixson, R. J., Co. | Wichita, KS 67278 | Oil Operator | Oct 2002 |
| 1261 | WJ South Waskom #1, LLC | Dallas, TX 75205 | Oil Operator | Sep 2026 |
| 1262 | WJC, Inc. | Post, TX 79356 | Oil & Gas Operator | Sep 2026 |
| 1263 | WJH Energy, Inc. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 1264 | WJM Oil Inc | Shawnee, OK 74804-3203 | Oil & Gas Operator | Jan 2013 |
| 1265 | WJR Production LLC | Fort Worth, TX 76177 | Oil Operator | Jun 2026 |
| 1266 | WJW Operating Co.,LLC | Austin, TX 78738 | Oil & Gas Operator | May 2002 |
| 1267 | Wle, Inc. | | Oil & Gas Operator | Feb 2012 |
| 1268 | WLH Production LLC | Gainesville, TX 76240 | Oil Operator | Sep 2026 |
| 1269 | WLP Oil Inc | Gillette, WY 82717 | Oil & Gas Operator | Dec 2018 |
| 1270 | WLS Corporation | | Oil Operator | Aug 2009 |
| 1271 | WLS, Inc | | Oil & Gas Operator | Jul 2026 |
| 1272 | WLW Oil & Gas LLC | Kingfisher, OK 73750 | Oil & Gas Operator | Jun 2026 |
| 1273 | WM B Hill Production Co | | Oil Operator | Jun 1991 |
| 1274 | WM Energy LLC | Asher, OK 74826 | Oil & Gas Operator | May 2026 |
| 1275 | WM KS Energy Resources LLC | Shreveport, LA 71101 | Oil & Gas Operator | Nov 2019 |
| 1276 | WM Oil & Gas Inc | Canton, OH 44721 | Oil & Gas Operator | Dec 2018 |
| 1277 | WM Wild Wolf Production LLC | Albany, TX 76430 | Oil Operator | Sep 2026 |
| 1278 | WM. H. Brayton Trust | | Oil & Gas Operator | Dec 2000 |
| 1279 | WM. H. Kenny Consultants, LTD. | | Oil & Gas Operator | Nov 1991 |
| 1280 | WM. Herbert Hunt TR.Est. | | Oil & Gas Operator | Oct 1992 |
| 1281 | WM. Inabnet | | Gas Operator | Nov 2024 |
| 1282 | WM. T. Burton Industries, Inc. | | Oil & Gas Operator | Apr 1988 |
| 1283 | WM. Zuhone, Jr. | | Oil & Gas Operator | Aug 1988 |
| 1284 | Wme Yates LLC | | Gas Operator | Dec 2023 |
| 1285 | Wmo Oil, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2026 |
| 1286 | WMS Corporation | Corsicana, TX 75110 | Oil & Gas Operator | Sep 2026 |
| 1287 | WMS Oil Company | Post, TX 79356 | Oil & Gas Operator | May 2019 |
| 1288 | WN Operating Inc | Okmulgee, OK 74447 | Oil & Gas Operator | May 2026 |
| 1289 | WNR Enterprises', Inc. | | Oil & Gas Operator | Feb 1997 |
| 1290 | WNR Haynesville Operating, LLC | Oklahoma City, OK 73102 | Gas Operator | Sep 2026 |
| 1291 | WNT Operating Inc | Dover, OH 44622 | Oil & Gas Operator | Dec 2001 |
| 1292 | Wnu Energy LLC | Pinedale, WY 82941 | Oil & Gas Operator | Jul 2026 |
| 1293 | Wo Operating Company | Tulsa, OK 74159 | Oil & Gas Operator | Sep 2026 |
| 1294 | Woco La, LLC | | Oil Operator | Jan 2025 |
| 1295 | Woco, Inc. | Wichita, KS 67214 | Oil Operator | Dec 2009 |
| 1296 | Wofford, C. J. | El Campo, TX 77437 | Oil & Gas Operator | Sep 2026 |
| 1297 | Wohlford Properties Inc | Barling, AR 72923 | Gas Operator | Apr 2022 |
| 1298 | Wolco Energy, Inc. | Dallas, TX 75220 | Oil & Gas Operator | May 1997 |
| 1299 | Wolcott, Ed Operating | Dallas, TX 75205 | Oil & Gas Operator | Oct 2000 |
| 1300 | Wold Energy Partners LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2022 |