| 32901 | Zadeck Energy Group, Inc. | | Oil & Gas Operator | Dec 2011 |
| 32902 | Zaf Oil | San Antonio, TX 78230 | Oil & Gas Operator | Aug 2002 |
| 32903 | Zafar Oil & Gas, Inc. | Oklahoma City, OK 73132 | Oil Operator | Aug 2013 |
| 32904 | Zagava, LLC | Breckenridge, TX 76424 | Oil & Gas Operator | Dec 2025 |
| 32905 | Zajac Oil Co. | Electra, TX 76360 | Oil & Gas Operator | Dec 2025 |
| 32906 | Zam'S Production Company | | Oil Operator | Sep 2004 |
| 32907 | Zama Petro Inc | Clinton, WA 98236-0100 | Oil & Gas Operator | Dec 2024 |
| 32908 | Zap Oil Company | Nowata, OK 74048-2640 | Oil & Gas Operator | Nov 2005 |
| 32909 | Zapata-Fender, L. L. C. | Tyler, TX 75710 | Oil & Gas Operator | Apr 2001 |
| 32910 | Zargon Oil (ND) Inc. | | Oil & Gas Operator | Oct 2025 |
| 32911 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 32912 | Zavala Independent Gas, Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Oct 2007 |
| 32913 | Zavanna Resources LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2025 |
| 32914 | Zavanna, LLC | | Oil & Gas Operator | Oct 2025 |
| 32915 | Zaveri Oil & Gas LTD | Albany, KY 42602 | Oil Operator | Dec 2006 |
| 32916 | Zaza Energy, LLC | Houston, TX 77010 | Oil & Gas Operator | Dec 2025 |
| 32917 | Zca Gas Gathering Co., Inc. | Bartlesville, OK 74003 | Oil & Gas Operator | Apr 2020 |
| 32918 | Zeagler Enterprises, Inc. | | Oil & Gas Operator | Jun 2008 |
| 32919 | Zeal Production Company | Sperry, OK 74073-4714 | Oil & Gas Operator | Sep 2025 |
| 32920 | Zebra Oil And Gas | Lubbock, TX 79423 | Oil & Gas Operator | Aug 2002 |
| 32921 | Zebra Oil Company | El Campo, TX 77437 | Oil & Gas Operator | Dec 2025 |
| 32922 | Zeiders Bros. Oil & Gas Company, L.L.C. | Edmond, OK 73003 | Oil & Gas Operator | Aug 2025 |
| 32923 | Zeit Exploration Co., Inc. | | Oil & Gas Operator | May 1994 |
| 32924 | Zelaya Oil And Gas, LLC | Premont, TX 78375 | Oil & Gas Operator | Dec 2025 |
| 32925 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Sep 2025 |
| 32926 | Zenergy Operating Co. | | Oil & Gas Operator | Sep 2023 |
| 32927 | Zenergy Operating Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Dec 2016 |
| 32928 | Zenith Drilling | | Oil & Gas Operator | Aug 1995 |
| 32929 | Zenith Drilling Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jun 2025 |
| 32930 | Zenith Exploration Co Inc | Washington, PA 15301 | Oil & Gas Operator | Dec 2014 |
| 32931 | Zenith Oil & Gas Inc | MT Gilead, OH 43338 | Oil & Gas Operator | Dec 1999 |
| 32932 | Zenith Oil & Gas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Aug 2025 |
| 32933 | Zenithal LLC | Isonville, KY 41149 | Oil & Gas Operator | Dec 2023 |
| 32934 | Zephyr Lone Star Oper Co.,L.L.C. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2025 |
| 32935 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Sep 2025 |
| 32936 | Zephyr SWD LLC | Oklahoma City, OK 73118-6035 | Oil Operator | Sep 2025 |
| 32937 | Zerbst James E | | Oil & Gas Operator | Apr 2007 |
| 32938 | Zercon Oil & Gas, Inc. | | Oil Operator | Oct 2003 |
| 32939 | Zero Mass Mining, LLC | | Oil Operator | Jan 2025 |
| 32940 | Zeta Energy LLC | Ashland, OR 97520 | Oil Operator | Jun 2025 |
| 32941 | Zetetic Partners, LTD. | Georgetown, TX 78626 | Oil Operator | Dec 2018 |
| 32942 | Zgen, Inc. | | Oil & Gas Operator | Jul 1990 |
| 32943 | Zia Energy Inc | The Woodlands, TX 77380 | Oil & Gas Operator | May 2005 |
| 32944 | Zia Minerals LTD Co | Andrews, TX 79714 | Oil & Gas Operator | Sep 1996 |
| 32945 | Zickefoose, R. L. And W.F. | Burgettstown, PA 15021 | Oil & Gas Operator | Dec 2021 |
| 32946 | Ziegler-Peru, Inc. | Houston, TX 77027 | Oil & Gas Operator | Dec 2019 |
| 32947 | Zielinski, Jason H. | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 32948 | Zilhaver Brian K | Cambridge Springs, PA 16403-4114 | Gas Operator | Dec 2024 |
| 32949 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 32950 | Zilkha Energy Inc | Houston, TX 77002-5223 | Oil & Gas Operator | Dec 2008 |
| 32951 | Zim Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Jan 1998 |
| 32952 | Zimco (Robt A Zimmerman) | Wolf Point, MT 59201 | Oil Operator | Apr 2009 |
| 32953 | Zimmerman Oil & Gas Exploration, Inc. | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 32954 | Zimmerman, Aaron W. | Penn Yan, NY 14527 | Gas Operator | Dec 2024 |
| 32955 | Zimmerman, IVan L. & Lois N. | Penn Yan, NY 14527 | Gas Operator | Dec 2024 |
| 32956 | Zimmerman, Jon C., II | Freeland, MI 48623 | Gas Operator | Dec 2024 |
| 32957 | Zimtex Energy LLC | Perryton, TX 79070-5818 | Oil & Gas Operator | Nov 2017 |
| 32958 | Zingara Grimes, LLC | Dallas, TX 75205 | Oil & Gas Operator | Dec 2025 |
| 32959 | Zink Petroleum Corp | Uniontown, OH 44685 | Oil & Gas Operator | Dec 1993 |
| 32960 | Zinke & Trumbo L | | Oil & Gas Operator | Nov 2000 |
| 32961 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |
| 32962 | Zinke & Trumbo, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2007 |
| 32963 | Zinn Petroleum Co. | Houston, TX 77024 | Oil & Gas Operator | Nov 2021 |
| 32964 | Zinszer Oil Co., Inc. | Hays, KS 67601 | Oil Operator | Dec 2019 |
| 32965 | Zinszer Oil Comp | | Oil Operator | Aug 1985 |
| 32966 | Zion Energy Corporation | Peru, KS 67360 | Oil Operator | Aug 2000 |
| 32967 | Zittel, Kenneth D. | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 32968 | Zivney Energy | White Oak, TX 75693 | Oil & Gas Operator | Dec 2025 |
| 32969 | ZK Petroleum Co., L.L.C. | Houston, TX 77057 | Oil Operator | Dec 2025 |
| 32970 | Zlab, Adolph | Yates Center, KS 66783 | Oil Operator | Jul 1997 |
| 32971 | Zlomek, John | Belmont, NY 14813 | Oil & Gas Operator | Dec 2024 |
| 32972 | Zoandra Petroleu | | Oil & Gas Operator | May 1993 |
| 32973 | Zoe Oil & Energy, LP | Fort Worth, TX 76148 | Oil & Gas Operator | Dec 2025 |
| 32974 | Zoller & Danneberg Inc | Denver, CO 80203 | Oil & Gas Operator | May 1975 |
| 32975 | Zollinger Veldon | Cresent, OK 73028 | Oil & Gas Operator | Apr 2009 |
| 32976 | Zollinger Veldon Inc | Crescent, OK 73028-9280 | Oil & Gas Operator | Nov 2018 |
| 32977 | Zonal Holding Corp. | | Oil Operator | Dec 1998 |
| 32978 | Zone Energy, LLC | Houston, TX 77251 | Oil & Gas Operator | Jan 2025 |
| 32979 | Zoran Oil & Gas | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2011 |
| 32980 | Zoran Oil & Gas Co | Jefferson, OH 44047 | Oil & Gas Operator | Dec 2024 |
| 32981 | Zorger, Gerald W. | Wichita, KS 67202 | Oil & Gas Operator | Apr 1985 |
| 32982 | Zorra Oil & Gas | Dilley, TX 78017 | Oil & Gas Operator | Dec 2025 |
| 32983 | ZP Disposal Systems LLC | Kingfisher, OK 73750 | Oil Operator | Sep 2025 |
| 32984 | ZSX, Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Jul 1997 |
| 32985 | ZTC Petro Investments LP | Houston, TX 77056 | Oil & Gas Operator | May 2020 |
| 32986 | ZTH Operating, LLC | Troup, TX 75789 | Oil & Gas Operator | Dec 2025 |
| 32987 | Zu, LLC | Hays, KS 67601 | Oil Operator | Jun 2025 |
| 32988 | Zuhone William H | Mattoon, IL 61938-4019 | Oil & Gas Operator | Jan 2015 |
| 32989 | Zukowski, Eve | Springville, NY 14141 | Gas Operator | Dec 2024 |
| 32990 | Zumyers Inc | Newalla, OK 74857-0259 | Oil Operator | Apr 2003 |
| 32991 | Zynergy LLC | | Oil Operator | Sep 2025 |
| 32992 | ZZ Energy LLC | Norman, OK 73070 | Gas Operator | Sep 2025 |
| 32993 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |