| 12601 | Yellowstone Petroleums Inc. | Canada, 00100 | Oil & Gas Operator | Jun 2025 |
| 12602 | Yentzen Investments, Inc. | Sugar Land, TX 77478 | Oil Operator | May 1993 |
| 12603 | Yep, LLC | Palestine, TX 75802 | Oil Operator | Jan 2017 |
| 12604 | Yet Profits, L.L.C. | Wichita Falls, TX 76308 | Oil Operator | Dec 2025 |
| 12605 | Yeti Exploration, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Dec 2025 |
| 12606 | Ynew Corporation | Austin, TX 78747 | Oil & Gas Operator | Dec 2025 |
| 12607 | Yobel, Inc. | Olney, TX 76374 | Oil & Gas Operator | Dec 2025 |
| 12608 | Yocham Oil And Gas Company | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 12609 | Yordes Energy, LLC | El Campo, TX 77437 | Oil Operator | Dec 2025 |
| 12610 | York & Price Petroleum Corp. | San Antonio, TX 78218 | Oil & Gas Operator | Jul 2004 |
| 12611 | York E & P, LLC | Boling, TX 77420 | Oil & Gas Operator | Dec 2025 |
| 12612 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 12613 | Young Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1999 |
| 12614 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | Dec 2025 |
| 12615 | Young, John H., Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 12616 | Young, L. M. | Brownwood, TX 76804 | Oil & Gas Operator | Aug 2003 |
| 12617 | Youngblood, C. S. III | Pampa, TX 79065 | Oil & Gas Operator | Dec 2001 |
| 12618 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Dec 2025 |
| 12619 | Yturri, Robert & John | San Antonio, TX 78205 | Oil & Gas Operator | Aug 2003 |
| 12620 | Yturria, Frank D. | Brownsville, TX 78520 | Oil & Gas Operator | Mar 2008 |
| 12621 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2025 |
| 12622 | Yukon Exploration Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Dec 2025 |
| 12623 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2025 |
| 12624 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 12625 | Yust, C. F. & R. L. | Batson, TX 77519 | Oil & Gas Operator | Sep 2002 |
| 12626 | Z&G Operating | Wichita Falls, TX 76302 | Oil Operator | Sep 2011 |
| 12627 | Z/F Little Buddy, L.P. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2000 |
| 12628 | Zachary Oil Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 12629 | Zachris, Inc. | Mansfield, TX 76063 | Oil Operator | Oct 2021 |
| 12630 | Zachry Exploration, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Dec 2025 |
| 12631 | Zachry Exploration, LLC | San Antonio, TX 78224 | Oil & Gas Operator | Dec 2025 |
| 12632 | Zachry Exploration, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Jan 2009 |
| 12633 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Dec 2025 |
| 12634 | Zachry Operating | Midland, TX 79708 | Oil & Gas Operator | Jan 2011 |
| 12635 | Zachry, H. B. Company | San Antonio, TX 78205 | Oil & Gas Operator | Apr 1994 |
| 12636 | Zackson Resources, Inc. | Houston, TX 77063 | Oil & Gas Operator | Dec 2025 |
| 12637 | Zadeck Energy Group | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2011 |
| 12638 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |
| 12639 | Zagava, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 12640 | Zajac Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Dec 2025 |
| 12641 | Zapata-Fender, L. L. C. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2001 |
| 12642 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 12643 | Zavala Independent Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2007 |
| 12644 | Zaza Energy, LLC | Houston, TX 77010 | Oil & Gas Operator | Dec 2025 |
| 12645 | Zebra Oil And Gas | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2002 |
| 12646 | Zebra Oil Company | El Campo, TX 77437 | Oil & Gas Operator | Dec 2025 |
| 12647 | Zelaya Oil And Gas, LLC | Premont, TX 78375 | Oil & Gas Operator | Dec 2025 |
| 12648 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Nov 2025 |
| 12649 | Zenith Oil & Gas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 12650 | Zephyr Lone Star Oper Co.,L.L.C. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 12651 | Ziegler-Peru, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2019 |
| 12652 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 12653 | Zingara Grimes, LLC | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 12654 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |
| 12655 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |
| 12656 | Zivney Energy | White Oak, TX 75693 | Oil & Gas Operator | Dec 2025 |
| 12657 | ZK Petroleum Co., L.L.C. | Houston, TX 77057 | Oil Operator | Dec 2025 |
| 12658 | Zoe Oil & Energy, LP | Fort Worth, TX 76148 | Oil & Gas Operator | Dec 2025 |
| 12659 | Zone Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Jan 2025 |
| 12660 | Zorra Oil & Gas | Dilley, TX 78017 | Oil & Gas Operator | Dec 2025 |
| 12661 | ZSX, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Jul 1997 |
| 12662 | ZTC Petro Investments LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 12663 | ZTH Operating, LLC | Troup, TX 75789 | Oil & Gas Operator | Dec 2025 |
| 12664 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |