| 1 | Y Oil Company Inc. | Cameron, TX 76520 | Oil & Gas Operator | Oct 2025 |
| 2 | Yale Oil Association | Oklahoma City, OK 73105 | Gas Operator | Oct 2013 |
| 3 | Yale Oil Association, Inc. | Oklahoma City, OK 73105 | Oil & Gas Operator | Jul 2025 |
| 4 | Yanahosa, Inc. | Kountze, TX 77625 | Oil Operator | Oct 2025 |
| 5 | Yarberry Operating, LLC | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2025 |
| 6 | Yarberry, E. E. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 2015 |
| 7 | Yarborough Oil & Gas L.P. | Midland, TX 79701 | Oil & Gas Operator | Oct 2000 |
| 8 | Yarborough, W. B. | Midland, TX 79701 | Oil & Gas Operator | Nov 1995 |
| 9 | Yates Drilling Company | Artesia, NM 88210 | Oil & Gas Operator | Dec 2021 |
| 10 | Yates Energy Corporation | Roswell, NM 88202 | Oil & Gas Operator | Oct 2025 |
| 11 | Yates Industries, LLC | Santa Fe, NM 87501 | Oil & Gas Operator | Oct 2025 |
| 12 | Yates Oil & Gas Company | Midland, TX 79702 | Oil & Gas Operator | Mar 2008 |
| 13 | Yates, Harvey E. Company | Roswell, NM 88201 | Oil & Gas Operator | Dec 2002 |
| 14 | Yeates Development Corporation | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 2025 |
| 15 | Yeates, F. L. | Breckenridge, TX 76424 | Oil & Gas Operator | Oct 1997 |
| 16 | Yegen E C | Casper, WY 82604 | Oil & Gas Operator | Mar 2015 |
| 17 | Yellow Rose Oil & Gas Oper. Inc. | Cisco, TX 76437 | Oil & Gas Operator | Oct 2025 |
| 18 | Yellow Rose Oil & Gas Operating | Cisco, TX 76437 | Oil & Gas Operator | Jan 1996 |
| 19 | Yellowstone Petroleums Inc. | Canada, 00100 | Oil & Gas Operator | Jun 2025 |
| 20 | Yentzen Investments, Inc. | Sugar Land, TX 77478 | Oil Operator | May 1993 |
| 21 | Yep, LLC | Palestine, TX 75802 | Oil Operator | Jan 2017 |
| 22 | Yet Profits, L.L.C. | Wichita Falls, TX 76308 | Oil Operator | Oct 2025 |
| 23 | Yeti Exploration, LLC | Fort Worth, TX 76107 | Oil & Gas Operator | Oct 2025 |
| 24 | Ynew Corporation | Austin, TX 78747 | Oil & Gas Operator | Oct 2025 |
| 25 | Yobel, Inc. | Olney, TX 76374 | Oil & Gas Operator | Oct 2025 |
| 26 | Yocham Oil And Gas Company | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 27 | Yordes Energy, LLC | El Campo, TX 77437 | Oil Operator | Oct 2025 |
| 28 | York & Price Petroleum Corp. | San Antonio, TX 78218 | Oil & Gas Operator | Jul 2004 |
| 29 | York E & P, LLC | Boling, TX 77420 | Oil & Gas Operator | Oct 2025 |
| 30 | Young Marshall R Oil Co | Fort Worth, TX 76107 | Oil & Gas Operator | Mar 2011 |
| 31 | Young Resources, Inc. | Fort Worth, TX 76102 | Oil & Gas Operator | Aug 1999 |
| 32 | Young, Clint Inc. | Graham, TX 76450 | Oil & Gas Operator | Oct 2025 |
| 33 | Young, John H., Inc. | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 34 | Young, L. M. | Brownwood, TX 76804 | Oil & Gas Operator | Aug 2003 |
| 35 | Youngblood, C. S. III | Pampa, TX 79065 | Oil & Gas Operator | Dec 2001 |
| 36 | Younger Energy Company | Wichita, KS 67206 | Oil & Gas Operator | Oct 2025 |
| 37 | Yturri, Robert & John | San Antonio, TX 78205 | Oil & Gas Operator | Aug 2003 |
| 38 | Yturria, Frank D. | Brownsville, TX 78520 | Oil & Gas Operator | Mar 2008 |
| 39 | Yucca Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Oct 2025 |
| 40 | Yukon Exploration Operating, LLC | Dallas, TX 75219 | Oil & Gas Operator | Oct 2025 |
| 41 | Yuma E & P Company, Inc. | Houston, TX 77027 | Oil & Gas Operator | Oct 2025 |
| 42 | Yuma Petroleum Company | Houston, TX 77027 | Oil & Gas Operator | Aug 2002 |
| 43 | Yust, C. F. & R. L. | Batson, TX 77519 | Oil & Gas Operator | Sep 2002 |