| 1 | X-Bar LMT Partnership | | Oil & Gas Operator | May 2013 |
| 2 | X-Bar Resources Inc | Holdenville, OK 74848 | Oil & Gas Operator | Jul 2013 |
| 3 | X-L Energy Company | El Paso, TX 79902 | Oil & Gas Operator | Apr 2026 |
| 4 | Xae Corporation | Norman, OK 73072 | Oil & Gas Operator | Apr 2021 |
| 5 | Xanadu Exploration Company | Broken Arrow, OK 74014 | Oil & Gas Operator | Jan 2026 |
| 6 | XCL Assetco, LLC | Houston, TX 77007 | Oil & Gas Operator | Nov 2025 |
| 7 | XCL-Louisiana, Inc. | | Oil & Gas Operator | Aug 1993 |
| 8 | XCL-Texas, Inc. | Lafayette, LA 70503 | Oil & Gas Operator | Nov 2000 |
| 9 | Xenex Incorporat | | Oil Operator | Mar 1991 |
| 10 | Xenia Corporation, The | Garnett, KS 66032 | Oil Operator | Jan 2001 |
| 11 | Xeno, Inc | Calgary, AB T2P 2S5 | Gas Operator | Dec 2001 |
| 12 | Xenon Energy, Inc. | Plano, TX 75074 | Oil & Gas Operator | Aug 2003 |
| 13 | Xeric Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Jul 1997 |
| 14 | Xeric Oil & Gas Corporation | Midland, TX 79702 | Oil & Gas Operator | Apr 2014 |
| 15 | Xet, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Aug 2017 |
| 16 | Xhorizons Energy LLC | Houston, TX 77079 | Oil Operator | Apr 2026 |
| 17 | Xmco Inc | | Oil & Gas Operator | Sep 1986 |
| 18 | Xog Operating LLC | Midland, TX 79702 | Oil & Gas Operator | Apr 2026 |
| 19 | Xog Resources, LLC | Spring, TX 77379 | Oil & Gas Operator | Apr 2026 |
| 20 | Xoil Inc | Aurora, CO 80016 | Oil & Gas Operator | Jul 2023 |
| 21 | Xophi Energy, LLC | Arlington, TX 76006 | Oil & Gas Operator | Apr 2026 |
| 22 | Xplor Corporation | | Oil & Gas Operator | Dec 2013 |
| 23 | Xplor Energy Operating Co. | Houston, TX 77079 | Oil & Gas Operator | Jan 2012 |
| 24 | Xplore Operating, LLC | Arlington, TX 76001 | Oil & Gas Operator | Apr 2026 |
| 25 | XPR Resources LLC | Canonsburg, PA 15317-5862 | Gas Operator | Jan 2026 |
| 26 | XPR Wyoming LLC | | Oil & Gas Operator | Jan 2026 |
| 27 | Xstar Resources LLC | Jacksboro, TX 76458 | Oil & Gas Operator | Apr 2026 |
| 28 | Xta Resources LLC | Uvalde, TX 78801 | Oil & Gas Operator | Apr 2026 |
| 29 | XTO Energy Inc. | Spring, TX 77389 | Oil & Gas Operator | Apr 2026 |
| 30 | XTO Offshore Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 2010 |
| 31 | XTO Permian Operating LLC. | Midland, TX 79705 | Oil & Gas Operator | Jan 2026 |
| 32 | Xtra Energy Corporation | | Oil & Gas Operator | Jun 1989 |
| 33 | Xtra Energy, LLC | Fort Worth, TX 76161 | Oil & Gas Operator | Apr 2026 |
| 34 | Xtreme Operating Company LLC | Flower Mound, TX 75022 | Oil Operator | Apr 2026 |
| 35 | Xutapa Properties LLC | | Oil & Gas Operator | Dec 2025 |
| 36 | Xyz Oil, Inc. | Muenster, TX 76252 | Oil & Gas Operator | Apr 2026 |