| 1301 | White Rock Oil & Gas, LLC | Plano, TX 75024 | Oil & Gas Operator | Jul 2026 |
| 1302 | Whiting Oil And Gas Corporation | Houston, TX 77002 | Oil & Gas Operator | Jul 2026 |
| 1303 | Wichita River Oil Corporation | Englewood, CO 80111 | Oil & Gas Operator | Apr 2009 |
| 1304 | Wilbanks Exploration Inc | Denver, CO 80202 | Oil & Gas Operator | May 2002 |
| 1305 | Wildfire Partners Inc | Ardmore, OK 73402 | Oil & Gas Operator | Dec 2009 |
| 1306 | Williams Exploration Company | | Oil & Gas Operator | Dec 1986 |
| 1307 | Williams Ted H | | Oil & Gas Operator | Dec 2008 |
| 1308 | Williston Basin Cosul-Profit SH | | Oil Operator | Dec 1989 |
| 1309 | Wilshire Enterprises Inc | Oklahoma City, OK 73102 | Oil & Gas Operator | Mar 2015 |
| 1310 | Win Oil Company | Russell, KS 67665 | Oil & Gas Operator | Jul 2021 |
| 1311 | Winco Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Dec 1997 |
| 1312 | Wind River Energy Commission | | Oil Operator | Mar 2026 |
| 1313 | Wind River Exploration | Powell, WY 82435 | Oil & Gas Operator | Jun 2026 |
| 1314 | Windsor Energy Group LLC | Oklahoma City, OK 73118 | Oil & Gas Operator | Aug 2021 |
| 1315 | Winkler L W & Son | Denver, CO 80222 | Oil & Gas Operator | Dec 2001 |
| 1316 | Winter Ridge Energy LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2011 |
| 1317 | WLP Oil Inc | Gillette, WY 82717 | Oil & Gas Operator | Dec 2018 |
| 1318 | Wnu Energy LLC | Pinedale, WY 82941 | Oil & Gas Operator | Jun 2026 |
| 1319 | Wold Energy Partners LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2022 |
| 1320 | Wold John S | | Gas Operator | Feb 1991 |
| 1321 | Wold Oil & Gas | | Oil & Gas Operator | Oct 1996 |
| 1322 | Wold Oil Properties Inc | Denver, CO 80203 | Oil & Gas Operator | Feb 2018 |
| 1323 | Wolf Energy Company | | Oil & Gas Operator | Dec 1985 |
| 1324 | Wolverine Operations LLC | Buffalo, WY 82834 | Gas Operator | Oct 2008 |
| 1325 | Wood River Oil & Refining Co | | Oil & Gas Operator | Dec 1998 |
| 1326 | Woods Petroleum Corporation | Oklahoma City, OK 73112 | Oil & Gas Operator | Mar 2015 |
| 1327 | WPX Energy RM Company | Tulsa, OK 74101 | Oil & Gas Operator | Jun 2014 |
| 1328 | WPX Energy Rocky Mountain LLC | Tulsa, OK 74101 | Oil & Gas Operator | May 2026 |
| 1329 | WRC Energy LLC | Tulsa, OK 74135 | Oil & Gas Operator | May 2026 |
| 1330 | Wulf Oil Co | | Oil & Gas Operator | Dec 1984 |
| 1331 | Wy Basin Operating LLC | Dallas, TX 75206 | Oil & Gas Operator | May 2026 |
| 1332 | Wyatt Petroleum Corporation | Evergreen, CO 80437 | Gas Operator | Jul 2002 |
| 1333 | Wychgram Daniel C | Thermopolis, WY 82443 | Oil Operator | Feb 2001 |
| 1334 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Jul 2026 |
| 1335 | Wyoil Corp | Buffalo, WY 82834 | Oil Operator | Aug 2025 |
| 1336 | Wyoming Energy Partners LLC | | Oil Operator | Jun 2026 |
| 1337 | Wyoming Mineral Exploration LLC | Casper, WY 82602 | Oil Operator | Dec 2006 |
| 1338 | Wyoming Oil & Minerals Inc | Casper, WY 82601 | Oil & Gas Operator | Jun 2001 |
| 1339 | Wyoming Resources Corporation | Rapid City, SD 57702 | Oil & Gas Operator | Oct 2018 |
| 1340 | Wyoming Western Oil | Pine Bluffs, WY 82082 | Oil Operator | Sep 2019 |
| 1341 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 1342 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Jul 2026 |
| 1343 | Xoil Inc | Aurora, CO 80016 | Oil & Gas Operator | Jul 2023 |
| 1344 | XPR Wyoming LLC | | Oil & Gas Operator | May 2026 |
| 1345 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jul 2026 |
| 1346 | Yates Drilling Company | Artesia, NM 88210 | Oil & Gas Operator | Dec 2021 |
| 1347 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |
| 1348 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 1349 | Z & S Construction Co Inc | Kimball, NE 69145 | Oil & Gas Operator | Feb 2026 |
| 1350 | Zavanna Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Feb 2026 |
| 1351 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | May 2026 |
| 1352 | Zerbst James E | | Oil & Gas Operator | Apr 2007 |