| 32301 | Zimmerman, Aaron W. | Penn Yan, NY 14527 | Gas Operator | Dec 2025 |
| 32302 | Zimmerman, IVan L. & Lois N. | Penn Yan, NY 14527 | Gas Operator | Dec 2025 |
| 32303 | Zimmerman, Jon C., II | Freeland, MI 48623 | Gas Operator | Dec 2025 |
| 32304 | Zimmerman, Wayne W. And Pauline R. | Penn Yan, NY 14527 | Gas Operator | Dec 2025 |
| 32305 | Zimtex Energy LLC | Perryton, TX 79070-5818 | Oil & Gas Operator | Nov 2017 |
| 32306 | Zingara Grimes, LLC | Dallas, TX 75205 | Oil & Gas Operator | Aug 2026 |
| 32307 | Zink Petroleum Corp | Uniontown, OH 44685 | Oil & Gas Operator | Dec 1993 |
| 32308 | Zinke & Trumbo L | | Oil & Gas Operator | Nov 2000 |
| 32309 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |
| 32310 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |
| 32311 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |
| 32312 | Zinszer Oil Co., Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 32313 | Zinszer Oil Comp | | Oil Operator | Aug 1985 |
| 32314 | Zion Energy Corporation | Peru, KS 67360 | Oil Operator | Aug 2000 |
| 32315 | Zittel, Kenneth D. | Springville, NY 14141 | Gas Operator | Dec 2025 |
| 32316 | Zivney Energy | White Oak, TX 75693 | Oil & Gas Operator | Aug 2026 |
| 32317 | ZK Petroleum Co., L.L.C. | Houston, TX 77057 | Oil Operator | Aug 2026 |
| 32318 | Zlab, Adolph | Yates Center, KS 66783 | Oil Operator | Jul 1997 |
| 32319 | Zlomek, John | Belmont, NY 14813 | Oil & Gas Operator | Dec 2024 |
| 32320 | Zoandra Petroleu | | Oil & Gas Operator | May 1993 |
| 32321 | Zoe Oil & Energy, LP | Watauga, TX 76148 | Oil & Gas Operator | Aug 2026 |
| 32322 | Zogreo Energy Inc. | Rockwall, TX 75087 | Oil Operator | Aug 2026 |
| 32323 | Zoller & Danneberg Inc | Denver, CO 80203 | Oil & Gas Operator | May 1975 |
| 32324 | Zollinger Veldon | Cresent, OK 73028 | Oil & Gas Operator | Apr 2009 |
| 32325 | Zollinger Veldon Inc | Crescent, OK 73028-9280 | Oil & Gas Operator | Nov 2018 |
| 32326 | Zonal Holding Corp. | | Oil Operator | Dec 1998 |
| 32327 | Zone Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Jan 2025 |
| 32328 | Zoran Oil & Gas Co | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2025 |
| 32329 | Zorger, Gerald W. | Wichita, KS 67202 | Oil & Gas Operator | Apr 1985 |
| 32330 | Zorra Oil & Gas | Dilley, TX 78017 | Oil & Gas Operator | Aug 2026 |
| 32331 | ZP Disposal Systems LLC | Kingfisher, OK 73750 | Oil Operator | Jun 2026 |
| 32332 | ZSX, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Jul 1997 |
| 32333 | ZTC Petro Investments LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 32334 | ZTH Operating, LLC | Troup, TX 75789 | Oil & Gas Operator | Aug 2026 |
| 32335 | Zu, LLC | Hays, KS 67601 | Oil Operator | Apr 2026 |
| 32336 | Zuhone William H | Mattoon, IL 61938-4019 | Oil & Gas Operator | Jan 2015 |
| 32337 | Zukowski, Eve | Springville, NY 14141 | Gas Operator | Dec 2025 |
| 32338 | Zumyers Inc | Newalla, OK 74857-0259 | Oil Operator | Apr 2003 |
| 32339 | Zynergy LLC | | Oil Operator | Dec 2025 |
| 32340 | ZZ Energy LLC | Norman, OK 73070 | Gas Operator | May 2026 |
| 32341 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |