| 6501 | Luff Exploration Company | Denver, CO 80203 | Oil & Gas Operator | Apr 2026 |
| 6502 | Lufkin Production Company Inc. | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2026 |
| 6503 | Luke, D.L. Oil Co. | Burkburnett, TX 76354 | Oil & Gas Operator | Jun 2026 |
| 6504 | Luke, W. J. | Muenster, TX 76252 | Oil & Gas Operator | Mar 2013 |
| 6505 | Luling O&G LLC | Cibolo, TX 78108 | Oil & Gas Operator | Jun 2026 |
| 6506 | Luling Oil & Gas Co Inc | San Antonio, TX 78209 | Oil Operator | Dec 1986 |
| 6507 | Luling Well Service | Luling, TX 78648 | Oil & Gas Operator | Jun 2026 |
| 6508 | Luloc Oil Co. | Lockhart, TX 78644 | Oil & Gas Operator | Aug 2003 |
| 6509 | Lumbley, W. F. | Hobbs, NM 88242 | Oil & Gas Operator | Jan 2008 |
| 6510 | Lunar Oil Company | Midland, TX 79708 | Oil & Gas Operator | Feb 1999 |
| 6511 | Lundberg Oil Co. | Dallas, TX 75360 | Oil & Gas Operator | Jan 2003 |
| 6512 | Lundberg Operating Corporation | Dallas, TX 75225 | Oil & Gas Operator | Oct 2002 |
| 6513 | Lundells, Inc. | Freer, TX 78357 | Oil & Gas Operator | Jan 1995 |
| 6514 | Lundy, Richard C. | Pampa, TX 79066 | Oil & Gas Operator | Aug 1997 |
| 6515 | Lunn, Will | Wichita Falls, TX 76301 | Oil & Gas Operator | Jun 1997 |
| 6516 | Lusk Nominee Trust | Houston, TX 77098 | Oil & Gas Operator | Jul 2019 |
| 6517 | Lutex Oil, LTD. | Luling, TX 78648 | Oil & Gas Operator | Sep 2024 |
| 6518 | Luttrell, T. Bruce Oil & Gas Opr | Freer, TX 78357 | Oil & Gas Operator | Mar 2008 |
| 6519 | Lutz And Boyd | Wichita Falls, TX 76308 | Oil & Gas Operator | Jun 2026 |
| 6520 | Luvwell Holdings | Tyler, TX 75701 | Oil Operator | Jun 2026 |
| 6521 | Luxe Operating LLC | Denver, CO 80202 | Oil & Gas Operator | Sep 2021 |
| 6522 | Luxor Oil & Gas, Inc. | Pampa, TX 79066 | Oil & Gas Operator | Mar 2017 |
| 6523 | LW Operating Co. | Wichita Falls, TX 76310 | Oil Operator | Jun 2026 |
| 6524 | LX4, LLC | Gage, OK 73843 | Oil Operator | Mar 2026 |
| 6525 | Lyco Energy Corporation | Dallas, TX 75206 | Oil & Gas Operator | Jun 2015 |
| 6526 | Lyn-San Company | Midland, TX 79708 | Oil & Gas Operator | Dec 2018 |
| 6527 | Lynbrook Oil Company | Houston, TX 77057 | Oil & Gas Operator | Dec 2008 |
| 6528 | Lynch, W. W. | San Antonio, TX 78205 | Oil & Gas Operator | Jul 2006 |
| 6529 | Lynch, Wilbur Waldo, Estate Of | New Braunfels, TX 78130 | Oil & Gas Operator | Oct 2017 |
| 6530 | Lynco Oilfield Equipment, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Aug 2003 |
| 6531 | Lynco Production Company | Dallas, TX 75243 | Oil & Gas Operator | Nov 1999 |
| 6532 | Lynd, J. L., Inc. | Austin, TX 78716 | Oil & Gas Operator | Sep 2009 |
| 6533 | Lyndum, Inc. | Weatherford, TX 76088 | Oil & Gas Operator | Oct 2009 |
| 6534 | Lyne Energy Corporation | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1995 |
| 6535 | Lynn Creek Energy | McKinney, TX 75071 | Oil & Gas Operator | Nov 2015 |
| 6536 | Lynn Creek Oil Company | Allen, TX 75002 | Oil & Gas Operator | Apr 2020 |
| 6537 | Lynn Creek Oil Partnership, II | Dallas, TX 75243 | Oil & Gas Operator | Oct 2003 |
| 6538 | Lynn Creek Production Company | Allen, TX 75002 | Oil & Gas Operator | Dec 2011 |
| 6539 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 6540 | Lynx Oil Co., Inc. | Denton, TX 76207 | Oil & Gas Operator | Sep 2003 |
| 6541 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Jun 2026 |
| 6542 | Lynx Petroleum Consultants Inc. | Hobbs, NM 88241 | Oil & Gas Operator | Feb 2024 |
| 6543 | Lyon Energy, Inc. | Plano, TX 75075 | Oil & Gas Operator | Feb 2000 |
| 6544 | Lyon Operating Company Inc.(Iii) | Jacksboro, TX 76458 | Oil & Gas Operator | Jun 2026 |
| 6545 | Lyric Energy, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 1996 |
| 6546 | Lytle & Phillips | Mexia, TX 76667 | Oil & Gas Operator | Mar 2008 |
| 6547 | Lytle Creek Operating, Inc. | Abilene, TX 79606 | Oil & Gas Operator | Jun 2026 |
| 6548 | LZB Energy, LLC | Austin, TX 78737 | Gas Operator | Jul 2020 |
| 6549 | LZS Corporation | Tulsa, OK 74105 | Oil & Gas Operator | Jan 2007 |
| 6550 | M & A Oil Company, LTD. | Wichita Falls, TX 76307 | Oil & Gas Operator | Jun 2026 |
| 6551 | M & B Oil Company | Holliday, TX 76366 | Oil & Gas Operator | Dec 2025 |
| 6552 | M & B Operating, LLC | Gonzales, TX 78629 | Oil Operator | Jun 2026 |
| 6553 | M & C Operating, LLC | Poteet, TX 78065 | Oil Operator | Jun 2026 |
| 6554 | M & D Oil & Gas | Levelland, TX 79336 | Oil & Gas Operator | Aug 2000 |
| 6555 | M & G Oil Company | Marble Falls, TX 78654 | Oil & Gas Operator | Jun 2026 |
| 6556 | M & J Energy, Inc. | Breckenridge, CO 80424 | Oil & Gas Operator | Jun 2026 |
| 6557 | M & J Production Company | Austwell, TX 77950 | Oil & Gas Operator | Jun 2020 |
| 6558 | M & K Operating LLC | Albany, TX 76430 | Oil & Gas Operator | Jun 2026 |
| 6559 | M & M Construction Co. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 1996 |
| 6560 | M & M General Contractors, Inc. | Big Spring, TX 79720 | Oil & Gas Operator | Jun 2026 |
| 6561 | M & M Oil & Gas Exploration Inc | Abilene, TX 79601 | Oil & Gas Operator | Mar 2008 |
| 6562 | M & M Oil Co., LLC | Oil City, LA 71061 | Oil & Gas Operator | Jun 2026 |
| 6563 | M & M Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Feb 2026 |
| 6564 | M & M Production LTD. | Midland, TX 79704 | Oil & Gas Operator | Jun 2026 |
| 6565 | M & M Resources Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 6566 | M & R Exploration Company | Houston, TX 77074 | Oil & Gas Operator | Aug 2003 |
| 6567 | M & S Exploration | El Campo, TX 77437 | Oil & Gas Operator | Jun 2026 |
| 6568 | M A S Operators | Kilgore, TX 75663 | Oil & Gas Operator | Jul 1999 |
| 6569 | M E G G , Inc. | Borger, TX 79008 | Oil & Gas Operator | Sep 2003 |
| 6570 | M E Klein & Associates, Inc. | Norman, OK 73070 | Oil & Gas Operator | Feb 2026 |
| 6571 | M H W, Inc. | Dallas, TX 75230 | Oil & Gas Operator | Jul 1996 |
| 6572 | M IV Ops., Inc. | San Antonio, TX 78217 | Oil & Gas Operator | Mar 1998 |
| 6573 | M R Ventures LLC | Dallas, TX 75367 | Oil & Gas Operator | Mar 2026 |
| 6574 | M S B Company | Slaton, TX 79364 | Oil & Gas Operator | Dec 2016 |
| 6575 | M T M Oil | Monahans, TX 79756 | Oil & Gas Operator | Jun 2026 |
| 6576 | M W Production Co. | New Braunfels, TX 78130 | Oil & Gas Operator | Aug 2003 |
| 6577 | M'Red Petroleum, LLC | Pampa, TX 79065 | Oil & Gas Operator | Dec 2010 |
| 6578 | M-2 Oil Company | Wichita Falls, TX 76306 | Oil & Gas Operator | May 2006 |
| 6579 | M-B Operating Co., Inc. | Rowlett, TX 75030 | Oil & Gas Operator | Jun 2026 |
| 6580 | M-C Production & Drilling Co,Inc | Longview, TX 75608 | Oil & Gas Operator | Jun 2026 |
| 6581 | M-Five Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Apr 2002 |
| 6582 | M-G Gas Company, Inc. | Plano, TX 75086 | Oil & Gas Operator | Jun 1999 |
| 6583 | M-J Oil Company Inc. | Minerva, OH 44657 | Oil & Gas Operator | Dec 2008 |
| 6584 | M-T Petroleum, Inc. | Andrews, TX 79714 | Oil & Gas Operator | Mar 2008 |
| 6585 | M-Tex Resources, Inc. | Merkel, TX 79536 | Oil & Gas Operator | Jun 2026 |
| 6586 | M-V Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 6587 | M-W-D Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jul 1999 |
| 6588 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Jun 2026 |
| 6589 | M. Grace, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Jun 2026 |
| 6590 | M. J. G., Inc. | Alice, TX 78333 | Oil & Gas Operator | Jul 2010 |
| 6591 | M. K. Production | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 6592 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 6593 | M. S. Productions, Inc. | Pittsburg, KS 66762 | Oil & Gas Operator | Nov 2019 |
| 6594 | M.A.R.S. Energy | Midland, TX 79705 | Oil & Gas Operator | Jun 2026 |
| 6595 | M.B. Properties, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 1995 |
| 6596 | M.B.J. Operating | Argyle, TX 76226 | Oil & Gas Operator | Jun 2022 |
| 6597 | M.D. Skroopka Operating, LLC | Oakland, CA 94611 | Oil & Gas Operator | Jun 2026 |
| 6598 | M.J.O.G., Inc. | Fort Smith, AR 72903 | Oil Operator | Mar 2015 |
| 6599 | M.K.B. Energy Corp | Brookesmith, TX 76827 | Gas Operator | Jun 2026 |
| 6600 | M.R.M. Operating, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 2003 |