| 6901 | X-Bar Resources Inc | Holdenville, OK 74848 | Oil & Gas Operator | Jul 2013 |
| 6902 | Xae Corporation | Norman, OK 73072 | Oil & Gas Operator | Apr 2021 |
| 6903 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Jan 2025 |
| 6904 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 6905 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Mar 2025 |
| 6906 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Mar 2025 |
| 6907 | Xutapa Properties LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Dec 2024 |
| 6908 | Y D F Inc | Oklahoma City, OK 73128 | Oil & Gas Operator | Jan 2025 |
| 6909 | Yager Company | Hutchinson, KS 67502 | Oil & Gas Operator | Dec 2000 |
| 6910 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Jan 2025 |
| 6911 | Yarberry Oil Company | Wichita Falls, TX 76308-5120 | Oil & Gas Operator | Apr 2015 |
| 6912 | Yarbrough R E | Lago VIsta, TX 78645-0005 | Oil & Gas Operator | Mar 2015 |
| 6913 | Yarhola Production Company | Drumright, OK 74030 | Oil & Gas Operator | Dec 2024 |
| 6914 | Yates Oil | Pawhuska, OK 74056 | Oil Operator | Mar 2015 |
| 6915 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |
| 6916 | Yerby Bill | Ada, OK 74820-5404 | Oil Operator | Jan 2012 |
| 6917 | Yeubanks Barbara | Cromwell, OK 74837 | Oil Operator | Jan 2025 |
| 6918 | Yingling Oil, Inc. | Oklahoma City, OK 73118 | Oil & Gas Operator | Dec 2000 |
| 6919 | Yocham Harlan E. | Sapulpa, OK 74066 | Oil Operator | Aug 2013 |
| 6920 | Young H Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 1993 |
| 6921 | Young Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1999 |
| 6922 | Young Tommy Oil Inc | Woodward, OK 73802-0893 | Oil & Gas Operator | Dec 2024 |
| 6923 | Young Z Joe | Cement, OK 73017-0600 | Oil & Gas Operator | Mar 2015 |
| 6924 | Young Zoral J | Cement, OK 73017 | Oil & Gas Operator | Sep 2000 |
| 6925 | Young, John H., Inc. | Houston, TX 77027 | Oil & Gas Operator | Mar 2025 |
| 6926 | Young, Marshall R., Oil Co. | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 6927 | Youngblood J Lee | Dallas, TX 75221 | Oil & Gas Operator | Feb 1996 |
| 6928 | Younger Enterprises Inc | Ada, OK 74821-1882 | Oil Operator | Jan 2003 |
| 6929 | Z G Operating LLC | Oklahoma City, OK 73134-5038 | Oil & Gas Operator | Nov 2009 |
| 6930 | Z G Exploration Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | Feb 2005 |
| 6931 | Zafar Oil & Gas, Inc. | Oklahoma City, OK 73132 | Oil Operator | Aug 2013 |
| 6932 | Zap Oil Company | Nowata, OK 74048-2640 | Oil & Gas Operator | Nov 2005 |
| 6933 | Zarvona Energy LLC | Houston, TX 77002 | Oil & Gas Operator | Mar 2025 |
| 6934 | Zca Gas Gathering Co., Inc. | Bartlesville, OK 74003 | Oil & Gas Operator | Apr 2020 |
| 6935 | Zeal Production Company | Sperry, OK 74073-4714 | Oil & Gas Operator | Jan 2025 |
| 6936 | Zeiders Bros Oil & Gas Co LLC | Edmond, OK 73003 | Oil & Gas Operator | Dec 2024 |
| 6937 | Zenergy Inc | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 6938 | Zenith Oil & Gas, LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2024 |
| 6939 | Zephyr Operating Co LLC | Oklahoma City, OK 73118-6035 | Oil & Gas Operator | Jan 2025 |
| 6940 | Zephyr SWD LLC | Oklahoma City, OK 73118-6035 | Oil Operator | Dec 2024 |
| 6941 | Zielke Contracting LLC | Balko, OK 73931-1187 | Oil Operator | Jun 2020 |
| 6942 | Zilkha Energy Company | Houston, TX 77046 | Oil & Gas Operator | Oct 2002 |
| 6943 | Zim Energy Corporation | Tulsa, OK 74153 | Oil & Gas Operator | Jan 1998 |
| 6944 | Zimet Brothers Inc | | Oil Operator | Mar 2008 |
| 6945 | Zimtex Energy LLC | Perryton, TX 79070-5818 | Oil & Gas Operator | Nov 2017 |
| 6946 | Zinke & Trumbo LTD | Tulsa, OK 74105 | Oil & Gas Operator | Sep 2017 |
| 6947 | Zion Energy Corporation | Peru, KS 67360 | Oil Operator | Aug 2000 |
| 6948 | Zollinger Veldon | Cresent, OK 73028 | Oil & Gas Operator | Apr 2009 |
| 6949 | Zollinger Veldon Inc | Crescent, OK 73028-9280 | Oil & Gas Operator | Nov 2018 |
| 6950 | ZP Disposal Systems LLC | Kingfisher, OK 73750 | Oil Operator | Dec 2024 |
| 6951 | Zuhone William H | Mattoon, IL 61938-4019 | Oil & Gas Operator | Jan 2015 |
| 6952 | Zumyers Inc | Newalla, OK 74857-0259 | Oil Operator | Apr 2003 |
| 6953 | ZZ Energy LLC | Norman, OK 73070 | Gas Operator | Dec 2024 |
| 6954 | Zzron Inc. | Midland, TX 79704 | Oil & Gas Operator | Aug 2003 |