| 12001 | WSM LLC | New Braunfels, TX 78132 | Oil Operator | Apr 2024 |
| 12002 | WT Fitts Operating | Bowie, TX 76230 | Oil & Gas Operator | Apr 2024 |
| 12003 | WTG Exploration | Midland, TX 79705 | Oil & Gas Operator | Apr 2024 |
| 12004 | WTG Exploration Inc | Midland, TX 79705 | Oil & Gas Operator | Dec 2023 |
| 12005 | WTP Energy, Inc. | Snyder, TX 79549 | Oil & Gas Operator | Apr 2024 |
| 12006 | WTXR Operating (Texas), Inc. | Carrollton, TX 75007 | Oil Operator | Apr 2024 |
| 12007 | Wy Woodland Operating, LLC | Covington, TX 76636 | Oil & Gas Operator | Apr 2024 |
| 12008 | Wyatt Permian, LLC | Corpus Chrsti, TX 78426 | Oil & Gas Operator | Apr 2024 |
| 12009 | Wyco Oil & Gas LLC | Odessa, TX 79766 | Oil & Gas Operator | Apr 2024 |
| 12010 | Wylie Bros. Prod. & DRGL. Co,Inc | Baird, TX 79504 | Oil & Gas Operator | Apr 2024 |
| 12011 | Wylie, Fred, Jr. | Moran, TX 76464 | Oil & Gas Operator | Oct 2022 |
| 12012 | Wynco Energy, Inc. | Spring, TX 77393 | Oil & Gas Operator | Apr 2024 |
| 12013 | Wynn-Crosby Energy, Inc. | Houston, TX 77002 | Oil & Gas Operator | May 2005 |
| 12014 | Wynn-Crosby Operating, LTD. | Dallas, TX 75201 | Oil & Gas Operator | Apr 2024 |
| 12015 | Wynne Petroleum Co. | Fort Worth, TX 76116 | Oil & Gas Operator | Nov 1997 |
| 12016 | Wyoming Diamond A LLC | Cheyenne, WY 82007 | Gas Operator | Apr 2024 |
| 12017 | X Stone Energy LLC. | Plano, TX 75093 | Oil & Gas Operator | Apr 2024 |
| 12018 | X-L Energy Company | El Paso, TX 79902 | Oil & Gas Operator | Apr 2024 |
| 12019 | X72 Operating Corp. | Plano, TX 75025 | Oil & Gas Operator | Apr 2024 |
| 12020 | XCL-Texas, Inc. | Lafayette, LA 70503 | Oil & Gas Operator | Nov 2000 |
| 12021 | Xenon Energy, Inc. | Plano, TX 75074 | Oil & Gas Operator | Aug 2003 |
| 12022 | Xeric Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Jul 1997 |
| 12023 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 12024 | Xet, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2017 |
| 12025 | Xhorizons Energy LLC | Houston, TX 77079 | Oil Operator | Apr 2024 |
| 12026 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 12027 | Xog Resources, LLC | Spring, TX 77379 | Oil & Gas Operator | Apr 2024 |
| 12028 | Xophi Energy, LLC | Arlington, TX 76006 | Oil & Gas Operator | Apr 2024 |
| 12029 | Xplor Energy Operating Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 2012 |
| 12030 | Xplore Operating, LLC | Arlington, TX 76001 | Oil & Gas Operator | Apr 2024 |
| 12031 | Xri Disposal Holdings, LLC | Midland, TX 79701 | Oil & Gas Operator | Apr 2024 |
| 12032 | Xstar Resources LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2024 |
| 12033 | Xta Resources LLC | Del Valle, TX 78617 | Oil & Gas Operator | Apr 2024 |
| 12034 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2024 |
| 12035 | XTO Offshore Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2010 |
| 12036 | Xtra Energy, LLC | Fort Worth, TX 76161 | Oil & Gas Operator | Apr 2024 |
| 12037 | Xtreme Operating Company LLC | Flower Mound, TX 75022 | Oil Operator | Apr 2024 |
| 12038 | Xyz Oil, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2024 |
| 12039 | Y Oil Company Inc. | Cameron, TX 76520 | Oil & Gas Operator | Apr 2024 |
| 12040 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Apr 2024 |
| 12041 | Yanahosa, Inc. | Kountze, TX 77625 | Oil Operator | Apr 2024 |
| 12042 | Yarberry Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 12043 | Yarberry, E. E. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2015 |
| 12044 | Yarborough Oil & Gas L.P. | Midland, TX 79701 | Oil & Gas Operator | Oct 2000 |
| 12045 | Yarborough, W. B. | Midland, TX 79701 | Oil & Gas Operator | Nov 1995 |
| 12046 | Yates Drilling Company | Artesia, NM 88210 | Oil & Gas Operator | Dec 2021 |
| 12047 | Yates Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Apr 2024 |
| 12048 | Yates Industries, LLC | Santa Fe, NM 87501 | Oil & Gas Operator | Apr 2024 |
| 12049 | Yates Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 12050 | Yates, Harvey E. Company | Roswell, NM 88201 | Oil & Gas Operator | Dec 2002 |
| 12051 | Yeates Development Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 12052 | Yeates, F. L. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 1997 |
| 12053 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |
| 12054 | Yellow Rose Oil & Gas Oper. Inc. | Cisco, TX 76437 | Oil & Gas Operator | Apr 2024 |
| 12055 | Yellow Rose Oil & Gas Operating | Cisco, TX 76437 | Oil & Gas Operator | Jan 1996 |
| 12056 | Yellowstone Petroleums Inc. | Canada, 00100 | Oil & Gas Operator | Nov 2023 |
| 12057 | Yentzen Investments, Inc. | Sugar Land, TX 77478 | Oil Operator | May 1993 |
| 12058 | Yep, LLC | Palestine, TX 75802 | Oil Operator | Jan 2017 |
| 12059 | Yet Profits, L.L.C. | Wichita Falls, TX 76308 | Oil Operator | Apr 2024 |
| 12060 | Yeti Exploration, LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2024 |
| 12061 | Ynew Corporation | Austin, TX 78747 | Oil & Gas Operator | Apr 2024 |
| 12062 | Yobel, Inc. | Olney, TX 76374 | Oil & Gas Operator | Apr 2024 |
| 12063 | Yocham Oil And Gas Company | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 12064 | Yordes Energy, LLC | El Campo, TX 77437 | Oil Operator | Apr 2024 |
| 12065 | York & Price Petroleum Corp. | San Antonio, TX 78218 | Oil & Gas Operator | Jul 2004 |
| 12066 | York E & P, LLC | Boling, TX 77420 | Oil & Gas Operator | Apr 2024 |
| 12067 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 12068 | Young Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1999 |
| 12069 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | Apr 2024 |
| 12070 | Young, John H., Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2024 |
| 12071 | Young, L. M. | Brownwood, TX 76804 | Oil & Gas Operator | Aug 2003 |
| 12072 | Youngblood, C. S. III | Pampa, TX 79065 | Oil & Gas Operator | Dec 2001 |
| 12073 | Younger Energy Company | Wichita, KS 67207 | Oil & Gas Operator | Apr 2024 |
| 12074 | Yturri, Robert & John | San Antonio, TX 78205 | Oil & Gas Operator | Aug 2003 |
| 12075 | Yturria, Frank D. | Brownsville, TX 78520 | Oil & Gas Operator | Mar 2008 |
| 12076 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Apr 2024 |
| 12077 | Yukon Exploration Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Apr 2024 |
| 12078 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Apr 2024 |
| 12079 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 12080 | Yust, C. F. & R. L. | Batson, TX 77519 | Oil & Gas Operator | Sep 2002 |
| 12081 | Z&G Operating | Wichita Falls, TX 76302 | Oil Operator | Sep 2011 |
| 12082 | Z/F Little Buddy, L.P. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2000 |
| 12083 | Zachary Oil Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 12084 | Zachris, Inc. | Mansfield, TX 76063 | Oil Operator | Oct 2021 |
| 12085 | Zachry Exploration, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Apr 2024 |
| 12086 | Zachry Exploration, LLC | San Antonio, TX 78224 | Oil & Gas Operator | Apr 2024 |
| 12087 | Zachry Exploration, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Jan 2009 |
| 12088 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Apr 2024 |
| 12089 | Zachry Operating | Midland, TX 79708 | Oil & Gas Operator | Jan 2011 |
| 12090 | Zackson Resources, Inc. | Houston, TX 77063 | Oil & Gas Operator | Apr 2024 |
| 12091 | Zadeck Energy Group | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2011 |
| 12092 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |
| 12093 | Zagava, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Apr 2024 |
| 12094 | Zajac Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Apr 2024 |
| 12095 | Zapata-Fender, L. L. C. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2001 |
| 12096 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 12097 | Zavala Independent Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2007 |
| 12098 | Zaza Energy, LLC | Houston, TX 77010 | Oil & Gas Operator | Apr 2024 |
| 12099 | Zebra Oil And Gas | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2002 |
| 12100 | Zebra Oil Company | El Campo, TX 77437 | Oil & Gas Operator | Apr 2024 |