| 32401 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Sep 2024 |
| 32402 | Zephyr SWD LLC | Oklahoma City, OK 73118-6035 | Oil Operator | Aug 2024 |
| 32403 | Zerbst James E | | Oil & Gas Operator | Apr 2007 |
| 32404 | Zercon Oil & Gas, Inc. | | Oil Operator | Oct 2003 |
| 32405 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | Jul 2024 |
| 32406 | Zetetic Partners, LTD. | Georgetown, TX 78626 | Oil Operator | Dec 2018 |
| 32407 | Zgen, Inc. | | Oil & Gas Operator | Jul 1990 |
| 32408 | Zia Energy Inc | The Woodlands, TX 77380 | Oil & Gas Operator | May 2005 |
| 32409 | Zia Minerals LTD Co | Andrews, TX 79714 | Oil & Gas Operator | Sep 1996 |
| 32410 | Zickefoose, R. L. And W.F. | Burgettstown, PA 15021-0000 | Oil & Gas Operator | Dec 2021 |
| 32411 | Ziegler-Peru, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2019 |
| 32412 | Zielke Contracting LLC | Balko, OK 73931-1187 | Oil Operator | Jun 2020 |
| 32413 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 32414 | Zilkha Energy Inc | Houston, TX 77002-5223-5223 | Oil & Gas Operator | Dec 2008 |
| 32415 | Zim Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Jan 1998 |
| 32416 | Zimco (Robt A Zimmerman) | Wolf Point, MT 59201 | Oil Operator | Apr 2009 |
| 32417 | Zimet Brothers Inc | | Oil Operator | Mar 2008 |
| 32418 | Zimmerman Oil & Gas Exploration, Inc. | Lovington, NM 88260 | Oil & Gas Operator | Jul 2024 |
| 32419 | Zimmerman, Aaron W. | Penn Yan, NY 14527 | Gas Operator | Dec 2023 |
| 32420 | Zimmerman, IVan L. & Lois N. | Penn Yan, NY 14527 | Gas Operator | Dec 2023 |
| 32421 | Zimmerman, Wayne W. And Pauline R. | Penn Yan, NY 14527 | Gas Operator | Dec 2023 |
| 32422 | Zimtex Energy LLC | Perryton, TX 79070-5818 | Oil & Gas Operator | Nov 2017 |
| 32423 | Zingara Grimes, LLC | Dallas, TX 75205 | Oil & Gas Operator | Nov 2024 |
| 32424 | Zink Petroleum Corp | Uniontown, OH 44685 | Oil & Gas Operator | Dec 1993 |
| 32425 | Zinke & Trumbo L | | Oil & Gas Operator | Nov 2000 |
| 32426 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |
| 32427 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |
| 32428 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |
| 32429 | Zinszer Oil Co., Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 32430 | Zinszer Oil Comp | | Oil Operator | Aug 1985 |
| 32431 | Zion Energy Corporation | Peru, KS 67360 | Oil Operator | Aug 2000 |
| 32432 | Zittel, Kenneth D. | Springville, NY 14141 | Gas Operator | Dec 2023 |
| 32433 | Zivney Energy | White Oak, TX 75693 | Oil & Gas Operator | Nov 2024 |
| 32434 | ZK Petroleum Co., L.L.C. | Houston, TX 77057 | Oil Operator | Nov 2024 |
| 32435 | Zlab, Adolph | Yates Center, KS 66783 | Oil Operator | Jul 1997 |
| 32436 | Zlomek, John | Belmont, NY 14813 | Oil & Gas Operator | Dec 2023 |
| 32437 | Zoandra Petroleu | | Oil & Gas Operator | May 1993 |
| 32438 | Zoe Oil & Energy, LP | Fort Worth, TX 76148 | Oil & Gas Operator | Nov 2024 |
| 32439 | Zoller & Danneberg Inc | Denver, CO 80203 | Oil & Gas Operator | May 1975 |
| 32440 | Zollinger Veldon | Cresent, OK 73028 | Oil & Gas Operator | Apr 2009 |
| 32441 | Zollinger Veldon Inc | Crescent, OK 73028-9280 | Oil & Gas Operator | Nov 2018 |
| 32442 | Zonal Holding Corp. | | Oil Operator | Dec 1998 |
| 32443 | Zone Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Jul 2024 |
| 32444 | Zoran Oil & Gas | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2011 |
| 32445 | Zoran Oil & Gas Co | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2023 |
| 32446 | Zorger, Gerald W. | Wichita, KS 67202 | Oil & Gas Operator | Apr 1985 |
| 32447 | Zorra Oil & Gas | Dilley, TX 78017 | Oil & Gas Operator | Nov 2024 |
| 32448 | ZP Disposal Systems LLC | Kingfisher, OK 73750 | Oil Operator | Sep 2024 |
| 32449 | ZSX, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Jul 1997 |
| 32450 | ZTC Petro Investments LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 32451 | ZTH Operating, LLC | Arp, TX 75750 | Oil & Gas Operator | Nov 2024 |
| 32452 | Zu, LLC | Hays, KS 67601 | Oil Operator | Jul 2024 |
| 32453 | Zuhone William H | Mattoon, IL 61938-4019 | Oil & Gas Operator | Jan 2015 |
| 32454 | Zukowski, Eve | Springville, NY 14141 | Gas Operator | Dec 2023 |
| 32455 | Zumyers Inc | Newalla, OK 74857-0259 | Oil Operator | Apr 2003 |
| 32456 | Zynergy LLC | | Oil Operator | Sep 2024 |
| 32457 | ZZ Energy LLC | Norman, OK 73070 | Gas Operator | Sep 2024 |
| 32458 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |