| 12301 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Jun 2026 |
| 12302 | Wynne Petroleum Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 1997 |
| 12303 | Wyoming Diamond A LLC | Cheyenne, WY 82007 | Gas Operator | Jun 2026 |
| 12304 | X-L Energy Company | El Paso, TX 79902 | Oil & Gas Operator | Jun 2026 |
| 12305 | XCL-Texas, Inc. | Lafayette, LA 70503 | Oil & Gas Operator | Nov 2000 |
| 12306 | Xenon Energy, Inc. | Plano, TX 75074 | Oil & Gas Operator | Aug 2003 |
| 12307 | Xeric Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Jul 1997 |
| 12308 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 12309 | Xet, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2017 |
| 12310 | Xhorizons Energy LLC | Houston, TX 77079 | Oil Operator | Jun 2026 |
| 12311 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 12312 | Xog Resources, LLC | Spring, TX 77379 | Oil & Gas Operator | Jun 2026 |
| 12313 | Xophi Energy, LLC | Arlington, TX 76006 | Oil & Gas Operator | Jun 2026 |
| 12314 | Xplor Energy Operating Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 2012 |
| 12315 | Xplore Operating, LLC | Arlington, TX 76001 | Oil & Gas Operator | Jun 2026 |
| 12316 | Xstar Resources LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2026 |
| 12317 | Xta Resources LLC | Uvalde, TX 78801 | Oil & Gas Operator | Jun 2026 |
| 12318 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Jun 2026 |
| 12319 | XTO Offshore Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2010 |
| 12320 | Xtra Energy, LLC | Fort Worth, TX 76161 | Oil & Gas Operator | Jun 2026 |
| 12321 | Xtreme Operating Company LLC | Flower Mound, TX 75022 | Oil Operator | Jun 2026 |
| 12322 | Xyz Oil, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Jun 2026 |
| 12323 | Y Oil Company Inc. | Cameron, TX 76520 | Oil & Gas Operator | Jun 2026 |
| 12324 | Yale Oil Association | Oklahoma City, OK 73105 | Gas Operator | Oct 2013 |
| 12325 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Mar 2026 |
| 12326 | Yanahosa, Inc. | Kountze, TX 77625 | Oil Operator | Jun 2026 |
| 12327 | Yarberry Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2026 |
| 12328 | Yarberry, E. E. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2015 |
| 12329 | Yarborough Oil & Gas L.P. | Midland, TX 79701 | Oil & Gas Operator | Oct 2000 |
| 12330 | Yarborough, W. B. | Midland, TX 79701 | Oil & Gas Operator | Nov 1995 |
| 12331 | Yates Drilling Company | Artesia, NM 88210 | Oil & Gas Operator | Dec 2021 |
| 12332 | Yates Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Jun 2026 |
| 12333 | Yates Industries, LLC | Santa Fe, NM 87501 | Oil & Gas Operator | Apr 2026 |
| 12334 | Yates Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 12335 | Yates, Harvey E. Company | Roswell, NM 88201 | Oil & Gas Operator | Dec 2002 |
| 12336 | Yeates Development Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Feb 2026 |
| 12337 | Yeates, F. L. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 1997 |
| 12338 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |
| 12339 | Yellow Rose Oil & Gas Oper. Inc. | Cisco, TX 76437 | Oil & Gas Operator | Jun 2026 |
| 12340 | Yellow Rose Oil & Gas Operating | Cisco, TX 76437 | Oil & Gas Operator | Jan 1996 |
| 12341 | Yellowstone Petroleums Inc. | Canada, 00100 | Oil & Gas Operator | Jan 2026 |
| 12342 | Yentzen Investments, Inc. | Sugar Land, TX 77478 | Oil Operator | May 1993 |
| 12343 | Yep, LLC | Palestine, TX 75802 | Oil Operator | Jan 2017 |
| 12344 | Yet Profits, L.L.C. | Wichita Falls, TX 76308 | Oil Operator | Jun 2026 |
| 12345 | Yeti Exploration, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2026 |
| 12346 | Ynew Corporation | Austin, TX 78747 | Oil & Gas Operator | Jun 2026 |
| 12347 | Yobel, Inc. | Olney, TX 76374 | Oil & Gas Operator | Jun 2026 |
| 12348 | Yocham Oil And Gas Company | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 12349 | Yordes Energy, LLC | El Campo, TX 77437 | Oil Operator | Jun 2026 |
| 12350 | York & Price Petroleum Corp. | San Antonio, TX 78218 | Oil & Gas Operator | Jul 2004 |
| 12351 | York E & P, LLC | Boling, TX 77420 | Oil & Gas Operator | Jun 2026 |
| 12352 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 12353 | Young Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1999 |
| 12354 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | Jun 2026 |
| 12355 | Young, John H., Inc. | Houston, TX 77027 | Oil & Gas Operator | Jun 2026 |
| 12356 | Young, L. M. | Brownwood, TX 76804 | Oil & Gas Operator | Aug 2003 |
| 12357 | Youngblood, C. S. III | Pampa, TX 79065 | Oil & Gas Operator | Dec 2001 |
| 12358 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Jun 2026 |
| 12359 | Yturri, Robert & John | San Antonio, TX 78205 | Oil & Gas Operator | Aug 2003 |
| 12360 | Yturria, Frank D. | Brownsville, TX 78520 | Oil & Gas Operator | Mar 2008 |
| 12361 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Jun 2026 |
| 12362 | Yukon Exploration Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Jun 2026 |
| 12363 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Jun 2026 |
| 12364 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 12365 | Yust, C. F. & R. L. | Batson, TX 77519 | Oil & Gas Operator | Sep 2002 |
| 12366 | Z&G Operating | Wichita Falls, TX 76302 | Oil Operator | Sep 2011 |
| 12367 | Z/F Little Buddy, L.P. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2000 |
| 12368 | Zachary Oil Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 12369 | Zachris, Inc. | Mansfield, TX 76063 | Oil Operator | Oct 2021 |
| 12370 | Zachry Exploration, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Jun 2026 |
| 12371 | Zachry Exploration, LLC | San Antonio, TX 78224 | Oil & Gas Operator | Jun 2026 |
| 12372 | Zachry Exploration, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Jan 2009 |
| 12373 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Jun 2026 |
| 12374 | Zachry Operating | Midland, TX 79708 | Oil & Gas Operator | Jan 2011 |
| 12375 | Zackson Resources, Inc. | Houston, TX 77063 | Oil & Gas Operator | Jun 2026 |
| 12376 | Zadeck Energy Group | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2011 |
| 12377 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |
| 12378 | Zagava, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jun 2026 |
| 12379 | Zajac Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Jun 2026 |
| 12380 | Zapata-Fender, L. L. C. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2001 |
| 12381 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Jun 2026 |
| 12382 | Zavala Independent Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2007 |
| 12383 | Zaza Energy, LLC | Houston, TX 77010 | Oil & Gas Operator | Jun 2026 |
| 12384 | Zebra Oil And Gas | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2002 |
| 12385 | Zebra Oil Company | El Campo, TX 77437 | Oil & Gas Operator | Jun 2026 |
| 12386 | Zelaya Oil And Gas, LLC | Premont, TX 78375 | Oil & Gas Operator | Jun 2026 |
| 12387 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2026 |
| 12388 | Zenith Oil & Gas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Feb 2026 |
| 12389 | Zephyr Lone Star Oper Co.,L.L.C. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jun 2026 |
| 12390 | Ziegler-Peru, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2019 |
| 12391 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 12392 | Zingara Grimes, LLC | Dallas, TX 75205 | Oil & Gas Operator | Jun 2026 |
| 12393 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |
| 12394 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |
| 12395 | Zivney Energy | White Oak, TX 75693 | Oil & Gas Operator | Jun 2026 |
| 12396 | ZK Petroleum Co., L.L.C. | Houston, TX 77057 | Oil Operator | Jun 2026 |
| 12397 | Zoe Oil & Energy, LP | Watauga, TX 76148 | Oil & Gas Operator | Jun 2026 |
| 12398 | Zogreo Energy Inc. | Rockwall, TX 75087 | Oil Operator | Jun 2026 |
| 12399 | Zone Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Jan 2025 |
| 12400 | Zorra Oil & Gas | Dilley, TX 78017 | Oil & Gas Operator | Jun 2026 |