| 32601 | Yukon Properties LLC | Villa Park, CA 92861 | Oil & Gas Operator | Sep 2017 |
| 32602 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Jul 2025 |
| 32603 | Yuma Oil Company | El Dorado, KS 67042 | Oil Operator | Apr 1993 |
| 32604 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 32605 | Yunker Oil Co. | | Oil & Gas Operator | Dec 1986 |
| 32606 | Yust, C. F. & R. L. | Batson, TX 77519 | Oil & Gas Operator | Sep 2002 |
| 32607 | Z & L Oil LLC | Longton, KS 67352 | Oil Operator | Mar 2025 |
| 32608 | Z & S Construction Co Inc | Kimball, NE 69145 | Oil & Gas Operator | Jun 2025 |
| 32609 | Z C Ambrose-G L Blaxton, Jr. | | Oil & Gas Operator | Apr 1983 |
| 32610 | Z G Operating LLC | Oklahoma City, OK 73134-5038 | Oil & Gas Operator | Nov 2009 |
| 32611 | Z G Exploration Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2005 |
| 32612 | Z&G Operating | Wichita Falls, TX 76302 | Oil Operator | Sep 2011 |
| 32613 | Z/F Little Buddy, L.P. | Tyler, TX 75710 | Oil & Gas Operator | Sep 2000 |
| 32614 | Zachary Oil Operating Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2023 |
| 32615 | Zachris, Inc. | Mansfield, TX 76063 | Oil Operator | Oct 2021 |
| 32616 | Zachry Exploration, Inc. | San Antonio, TX 78205 | Oil & Gas Operator | Jul 2025 |
| 32617 | Zachry Exploration, LLC | San Antonio, TX 78224 | Oil & Gas Operator | Jul 2025 |
| 32618 | Zachry Exploration, LTD. | San Antonio, TX 78205 | Oil & Gas Operator | Jan 2009 |
| 32619 | Zachry Oil And Gas Properties | Midland, TX 79708 | Oil & Gas Operator | Jul 2025 |
| 32620 | Zachry Operating | Midland, TX 79708 | Oil & Gas Operator | Jan 2011 |
| 32621 | Zachry, H. B. Company | San Antonio, TX 78205 | Oil & Gas Operator | Apr 1994 |
| 32622 | Zackson Resources, Inc. | Houston, TX 77063 | Oil & Gas Operator | Jul 2025 |
| 32623 | Zad, Inc. | | Oil Operator | May 2001 |
| 32624 | Zadeck Energy Group | Shreveport, LA 71101 | Oil & Gas Operator | Dec 2011 |
| 32625 | Zadeck Energy Group Inc | | Oil & Gas Operator | Dec 2011 |
| 32626 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |
| 32627 | Zafar Oil & Gas, Inc. | Oklahoma City, OK 73132 | Oil Operator | Aug 2013 |
| 32628 | Zagava, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Jul 2025 |
| 32629 | Zajac Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Jul 2025 |
| 32630 | Zam'S Production Company | | Oil Operator | Sep 2004 |
| 32631 | Zama Petro Inc | Clinton, WA 98236-0100 | Oil & Gas Operator | Dec 2024 |
| 32632 | Zap Oil Company | Nowata, OK 74048-2640 | Oil & Gas Operator | Nov 2005 |
| 32633 | Zapata-Fender, L. L. C. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2001 |
| 32634 | Zargon Oil (ND) Inc. | | Oil & Gas Operator | May 2025 |
| 32635 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Jul 2025 |
| 32636 | Zavala Independent Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2007 |
| 32637 | Zavanna Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Jan 2025 |
| 32638 | Zavanna, LLC | | Oil & Gas Operator | May 2025 |
| 32639 | Zaveri Oil & Gas LTD | Albany, KY 42602 | Oil Operator | Dec 2006 |
| 32640 | Zaza Energy, LLC | Houston, TX 77010 | Oil & Gas Operator | Jul 2025 |
| 32641 | Zca Gas Gathering Co., Inc. | Bartlesville, OK 74003 | Oil & Gas Operator | Apr 2020 |
| 32642 | Zeagler Enterprises, Inc. | | Oil & Gas Operator | Jun 2008 |
| 32643 | Zeal Production Company | Sperry, OK 74073-4714 | Oil & Gas Operator | May 2025 |
| 32644 | Zebra Oil And Gas | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2002 |
| 32645 | Zebra Oil Company | El Campo, TX 77437 | Oil & Gas Operator | Jul 2025 |
| 32646 | Zeiders Bros Oil & Gas Co LLC | Edmond, OK 73003 | Oil & Gas Operator | Apr 2025 |
| 32647 | Zeit Exploration Co., Inc. | | Oil & Gas Operator | May 1994 |
| 32648 | Zelaya Oil And Gas, LLC | Premont, TX 78375 | Oil & Gas Operator | Jul 2025 |
| 32649 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | May 2025 |
| 32650 | Zenergy Operating Co. | | Oil & Gas Operator | Sep 2023 |
| 32651 | Zenergy Operating Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2016 |
| 32652 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |
| 32653 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | Mar 2025 |
| 32654 | Zenith Exploration Co Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2014 |
| 32655 | Zenith Oil & Gas Inc | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 1999 |
| 32656 | Zenith Oil & Gas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 32657 | Zenithal LLC | Isonville, KY 41149 | Oil & Gas Operator | Dec 2023 |
| 32658 | Zephyr Lone Star Oper Co.,L.L.C. | Oklahoma City, OK 73118 | Oil & Gas Operator | Jul 2025 |
| 32659 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Apr 2025 |
| 32660 | Zephyr SWD LLC | Oklahoma City, OK 73118-6035 | Oil Operator | Apr 2025 |
| 32661 | Zerbst James E | | Oil & Gas Operator | Apr 2007 |
| 32662 | Zercon Oil & Gas, Inc. | | Oil Operator | Oct 2003 |
| 32663 | Zero Mass Mining, LLC | | Oil Operator | Jan 2025 |
| 32664 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | Mar 2025 |
| 32665 | Zetetic Partners, LTD. | Georgetown, TX 78626 | Oil Operator | Dec 2018 |
| 32666 | Zgen, Inc. | | Oil & Gas Operator | Jul 1990 |
| 32667 | Zia Energy Inc | The Woodlands, TX 77380 | Oil & Gas Operator | May 2005 |
| 32668 | Zia Minerals LTD Co | Andrews, TX 79714 | Oil & Gas Operator | Sep 1996 |
| 32669 | Zickefoose, R. L. And W.F. | Burgettstown, PA 15021 | Oil & Gas Operator | Dec 2021 |
| 32670 | Ziegler-Peru, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2019 |
| 32671 | Zielinski, Jason H. | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 32672 | Zilhaver Brian K | Cambridge Springs, PA 16403-4114 | Gas Operator | Dec 2024 |
| 32673 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 32674 | Zilkha Energy Inc | Houston, TX 77002-5223 | Oil & Gas Operator | Dec 2008 |
| 32675 | Zim Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Jan 1998 |
| 32676 | Zimco (Robt A Zimmerman) | Wolf Point, MT 59201 | Oil Operator | Apr 2009 |
| 32677 | Zimmerman Oil & Gas Exploration, Inc. | Lovington, NM 88260 | Oil & Gas Operator | Apr 2025 |
| 32678 | Zimmerman, Aaron W. | Penn Yan, NY 14527 | Gas Operator | Dec 2024 |
| 32679 | Zimmerman, IVan L. & Lois N. | Penn Yan, NY 14527 | Gas Operator | Dec 2024 |
| 32680 | Zimmerman, Jon C., II | Freeland, MI 48623 | Gas Operator | Dec 2024 |
| 32681 | Zimtex Energy LLC | Perryton, TX 79070-5818 | Oil & Gas Operator | Nov 2017 |
| 32682 | Zingara Grimes, LLC | Dallas, TX 75205 | Oil & Gas Operator | Jul 2025 |
| 32683 | Zink Petroleum Corp | Uniontown, OH 44685 | Oil & Gas Operator | Dec 1993 |
| 32684 | Zinke & Trumbo L | | Oil & Gas Operator | Nov 2000 |
| 32685 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |
| 32686 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |
| 32687 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |
| 32688 | Zinszer Oil Co., Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 32689 | Zinszer Oil Comp | | Oil Operator | Aug 1985 |
| 32690 | Zion Energy Corporation | Peru, KS 67360 | Oil Operator | Aug 2000 |
| 32691 | Zittel, Kenneth D. | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 32692 | Zivney Energy | White Oak, TX 75693 | Oil & Gas Operator | Jul 2025 |
| 32693 | ZK Petroleum Co., L.L.C. | Houston, TX 77057 | Oil Operator | Jul 2025 |
| 32694 | Zlab, Adolph | Yates Center, KS 66783 | Oil Operator | Jul 1997 |
| 32695 | Zlomek, John | Belmont, NY 14813 | Oil & Gas Operator | Dec 2024 |
| 32696 | Zoandra Petroleu | | Oil & Gas Operator | May 1993 |
| 32697 | Zoe Oil & Energy, LP | Fort Worth, TX 76148 | Oil & Gas Operator | Jul 2025 |
| 32698 | Zoller & Danneberg Inc | Denver, CO 80203 | Oil & Gas Operator | May 1975 |
| 32699 | Zollinger Veldon | Cresent, OK 73028 | Oil & Gas Operator | Apr 2009 |
| 32700 | Zollinger Veldon Inc | Crescent, OK 73028-9280 | Oil & Gas Operator | Nov 2018 |