| 16601 | Leiker, Edward P. | Hays, KS 67601 | Oil Operator | Apr 1992 |
| 16602 | Leis Oil Services, LLC | Yates Center, KS 66783 | Oil Operator | Jul 2023 |
| 16603 | Leis, John E. | Yates Center, KS 66783 | Oil Operator | Dec 2025 |
| 16604 | Leis, Ryan M. | Scottsdale, AZ 85258 | Oil & Gas Operator | Dec 2009 |
| 16605 | Leis, Steven A. | Yates Center, KS 66783 | Oil Operator | Dec 2025 |
| 16606 | Leis, VIctor J. | Paola, KS 66071 | Oil & Gas Operator | Dec 2025 |
| 16607 | Leith Operations | | Oil Operator | Jul 1989 |
| 16608 | Lejan, Inc. | Pampa, TX 79066 | Oil & Gas Operator | May 2026 |
| 16609 | Lekan James V | Ashland, OH 44805 | Oil & Gas Operator | Dec 1997 |
| 16610 | Leland Oil & Gas, LLC | | Oil & Gas Operator | Feb 2026 |
| 16611 | Leland Petroleum Production Inc | | Oil & Gas Operator | Dec 2007 |
| 16612 | Lem Operating Co., Inc. | Colorado City, TX 79512 | Oil & Gas Operator | Nov 2012 |
| 16613 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2026 |
| 16614 | Lemay Oil Company | Snyder, TX 79549 | Oil & Gas Operator | Jun 2002 |
| 16615 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Aug 2025 |
| 16616 | Lemon, Richard F. Jr. | Carrollton, TX 75006 | Oil & Gas Operator | May 2026 |
| 16617 | Lenape Resources Corp | | Oil & Gas Operator | Dec 2000 |
| 16618 | Lenape Resources LLC | | Oil & Gas Operator | Dec 2024 |
| 16619 | Lendrum Energy LLC | Cranberry, PA 16319-4009 | Oil & Gas Operator | Dec 2025 |
| 16620 | Lenert & Pettitt, Inc. | Shreveport, LA 71101 | Oil & Gas Operator | Sep 1994 |
| 16621 | Lengacher William P | Creston, OH 44217 | Oil & Gas Operator | Dec 2024 |
| 16622 | Lenhart Oil Company | Cashion, OK 73016-0188 | Oil & Gas Operator | Jul 2016 |
| 16623 | Lennon Oil Inc. | Corsicana, TX 75110 | Oil & Gas Operator | Oct 2008 |
| 16624 | Leo Michaelis Oil Operator | | Oil Operator | Oct 2002 |
| 16625 | Leo Vesenmeir, Jr. | | Oil & Gas Operator | Jul 1987 |
| 16626 | Leo Windham | | Oil Operator | Jul 1992 |
| 16627 | Leon J. Sabean | | Oil & Gas Operator | Dec 2018 |
| 16628 | Leonard 1&2 LLC | | Oil Operator | Mar 2026 |
| 16629 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | May 2026 |
| 16630 | Leonard Vann | | Oil Operator | Oct 2025 |
| 16631 | Leonard, Daniel M. | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2001 |
| 16632 | Leonard, J. A. | Austin, TX 78734 | Oil & Gas Operator | May 2026 |
| 16633 | Leonard, Patricia Anne | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1996 |
| 16634 | Leone, Thomas E. | Elma, NY 14059 | Gas Operator | Dec 2024 |
| 16635 | Leopard, Glenn | Malakoff, TX 75148 | Oil & Gas Operator | Aug 2003 |
| 16636 | Leopoldo P Bustamante | Midland, TX 79710 | Oil & Gas Operator | Apr 2012 |
| 16637 | Leor Energy Indigo L.P. | Houston, TX 77079 | Gas Operator | Oct 2017 |
| 16638 | Lep Development Company, LLC | Houston, TX 77007 | Oil & Gas Operator | Jul 2020 |
| 16639 | Lepp, Paul N. | Cherry Creek, NY 14723 | Gas Operator | Dec 2024 |
| 16640 | Lera | Borger, TX 79007 | Oil & Gas Operator | May 2026 |
| 16641 | Lerblance Jr W P Estate | Hartshorne, OK 74547-0449 | Oil & Gas Operator | Apr 2020 |
| 16642 | Leroy Holt Oil Operations | | Oil Operator | Mar 2010 |
| 16643 | Leroy Oil Co. | Gainesville, TX 76240 | Oil & Gas Operator | Jun 2002 |
| 16644 | Leroy W. James | | Oil & Gas Operator | Oct 1991 |
| 16645 | Les Miller | | Oil & Gas Operator | Dec 1991 |
| 16646 | Lesco Corp. | | Oil Operator | Dec 2000 |
| 16647 | Leshen Energy USA LLC | | Oil Operator | Jan 2025 |
| 16648 | Lesikar, L. W. | Fort Worth, TX 76121 | Oil & Gas Operator | Jun 2006 |
| 16649 | Leslie Oil & Gas Co Inc | Zanesville, OH 43701 | Oil & Gas Operator | Dec 1991 |
| 16650 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | Feb 2026 |
| 16651 | Letog LLC | Orwell, OH 44076 | Oil & Gas Operator | Dec 2025 |
| 16652 | Letwin & Kallison | Fort Worth, TX 76107 | Oil & Gas Operator | Jun 2004 |
| 16653 | Lety Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Aug 2002 |
| 16654 | Levant Energy LLC | Milton, MA 02186 | Oil Operator | May 2026 |
| 16655 | Levee Oil LLC | Tuscola, TX 79562 | Oil Operator | May 2026 |
| 16656 | Levengood Oil & Gas(Us)In | Dover, OH 44621-2900 | Oil & Gas Operator | Dec 1997 |
| 16657 | Levens, C. H. | Water Valley, TX 76958 | Oil & Gas Operator | May 2010 |
| 16658 | Leverage Operating, LLC | San Antonio, TX 78257 | Oil & Gas Operator | Dec 2021 |
| 16659 | Levi Oil Company | Wichita, KS 67218 | Oil & Gas Operator | Nov 1993 |
| 16660 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 16661 | Levinson Silvan E | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2012 |
| 16662 | Levisay Operating Co. | Brownwood, TX 76801 | Oil & Gas Operator | May 2026 |
| 16663 | Lewbet Inc | Perry, OK 73077 | Oil & Gas Operator | Aug 2024 |
| 16664 | Lewis & Clark Exploration | | Oil Operator | Feb 1989 |
| 16665 | Lewis & Hays | Albany, TX 76430 | Oil & Gas Operator | Feb 2002 |
| 16666 | Lewis & Manziel | | Oil Operator | Apr 1989 |
| 16667 | Lewis A. Hembree Production Company | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2026 |
| 16668 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Feb 2026 |
| 16669 | Lewis Heirs 480, LLC | Bryson, TX 76427 | Oil & Gas Operator | May 2026 |
| 16670 | Lewis J K | Duncan, OK 73534-1742 | Oil & Gas Operator | Apr 2015 |
| 16671 | Lewis James D Oil Company | Healdton, OK 73438 | Oil Operator | Jan 2026 |
| 16672 | Lewis John L Well Service | Sasakwa, OK 74867 | Oil Operator | May 2013 |
| 16673 | Lewis Oil & Gas Of Galva, Inc. | Galva, KS 67443 | Oil Operator | Dec 2025 |
| 16674 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Jun 2025 |
| 16675 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2026 |
| 16676 | Lewis Oil Operations LLC | Ratliff City, OK 73481 | Oil & Gas Operator | Jan 2026 |
| 16677 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | May 2026 |
| 16678 | Lewis Petro Properties, Inc. | San Antonio, TX 78216 | Oil & Gas Operator | May 2026 |
| 16679 | Lewis Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 1995 |
| 16680 | Lewis Williams | | Oil & Gas Operator | Feb 1991 |
| 16681 | Lewis Yale H | | Oil & Gas Operator | Aug 1986 |
| 16682 | Lewis, Beverly J | | Oil Operator | Nov 2025 |
| 16683 | Lewis, Bryan | Andover, NY 14806 | Oil & Gas Operator | Dec 2024 |
| 16684 | Lewis, Freddie | | Oil Operator | Dec 2023 |
| 16685 | Lewis, James B. Land & Oil Co. | Midland, TX 79702 | Oil & Gas Operator | Nov 1998 |
| 16686 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 16687 | Lewis, T. K. | Horseshoe Bay, TX 78657 | Oil & Gas Operator | May 2026 |
| 16688 | Lewis, William T. | Graham, TX 76450 | Oil & Gas Operator | Mar 2008 |
| 16689 | Lex And Lace Petroleum, LLC | Houston, TX 77269 | Oil Operator | May 2026 |
| 16690 | Lexgas, Inc. | Roanoke, TX 76262 | Oil & Gas Operator | May 2026 |
| 16691 | Lexico Exploration | | Oil Operator | Mar 1986 |
| 16692 | Lexicon Resources Corporation | | Oil & Gas Operator | Apr 1986 |
| 16693 | Lexus Gas Corporation | Roanoke, TX 76262 | Oil & Gas Operator | Jul 2005 |
| 16694 | LG&S Oil Company, LLC | Lovington, NM 88260 | Oil Operator | Feb 2026 |
| 16695 | LGDC Corporation | Shreveport, LA 71101 | Oil & Gas Operator | May 2026 |
| 16696 | LGS Exploration Program | | Gas Operator | Jul 1990 |
| 16697 | LGS Exploration, Inc. | | Oil & Gas Operator | Jan 1991 |
| 16698 | LH Oil, LLC | Ottawa, KS 66067 | Oil Operator | Dec 2025 |
| 16699 | LH Operating, LLC | Fulshear, TX 77441 | Oil & Gas Operator | Feb 2026 |
| 16700 | LHC Petroleum Corporation | | Oil & Gas Operator | Jul 2001 |