| 16501 | Lamar Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Oct 2015 |
| 16502 | Lamar Smith | | Oil Operator | Aug 1991 |
| 16503 | Lamarsa Corp. | Cut Bank, MT 59427 | Oil & Gas Operator | Jun 2025 |
| 16504 | Lamay Corporation | Rosenberg, TX 77471 | Oil & Gas Operator | Oct 2025 |
| 16505 | Lamb & Mize | Azle, TX 76020 | Oil & Gas Operator | Oct 2025 |
| 16506 | Lamb Alan L | Oklahoma City, OK 73120-7824 | Oil & Gas Operator | Feb 2020 |
| 16507 | Lamb, James L., Jr. | Austin, TX 78750 | Oil & Gas Operator | Mar 2016 |
| 16508 | Lamb, William Michael | Smithville, WV 26178 | Oil & Gas Operator | Dec 2021 |
| 16509 | Lambda Energy Resources LLC | | Oil & Gas Operator | Aug 2025 |
| 16510 | Lambdin William H | Oklahoma City, OK 73120 | Oil & Gas Operator | Nov 1998 |
| 16511 | Lambeck Petroleum, LLC | Stockdale, TX 78160 | Oil Operator | Oct 2025 |
| 16512 | Lamberd, Clayton | Olathe, KS 66061 | Oil Operator | Oct 2024 |
| 16513 | Lambert Company LLC | Healdton, OK 73438-0962 | Oil & Gas Operator | Jun 2025 |
| 16514 | Lambert Company The | Healdton, OK 73438-0962 | Oil & Gas Operator | Feb 2023 |
| 16515 | Lambert Oil & Gas LLC | Holdenville, OK 74848 | Oil & Gas Operator | May 2025 |
| 16516 | Lamberton Oil Co Inc | Tulsa, OK 74107 | Oil & Gas Operator | May 2013 |
| 16517 | Lamberton W J | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2015 |
| 16518 | Lamco Oil, LLC | Nocona, TX 76255 | Oil & Gas Operator | Oct 2025 |
| 16519 | Lamesa Crude | Abilene, TX 79605 | Oil & Gas Operator | Feb 2015 |
| 16520 | Lamima Corporation | Ardmore, OK 73401 | Oil Operator | Nov 1994 |
| 16521 | Lamkin Oil Company | Stephens, AR 71764 | Oil Operator | Jan 2025 |
| 16522 | Laml Compaines LLC | Cleveland, OK 74020 | Oil Operator | Jun 2025 |
| 16523 | Lammerts Robert P | Oklahoma City, OK 73102 | Oil & Gas Operator | Jan 2002 |
| 16524 | Lampert Exploration Corporation | Dallas, TX 75206 | Oil & Gas Operator | Mar 2008 |
| 16525 | Lamson Petroleum Corporation | | Oil & Gas Operator | Mar 1993 |
| 16526 | Lamson/Crocker Petroleum Corp. | | Oil & Gas Operator | May 1988 |
| 16527 | Lamson/Onshore Petroleum Corp. | | Oil & Gas Operator | Sep 1985 |
| 16528 | Lan Ma'S Oil And Gas LLC | Sugar Land, TX 77479 | Oil Operator | Jul 2025 |
| 16529 | Lancaster, Randy L. Dba Heritage Oil & Gas | Middlebourne, WV 26149 | Oil & Gas Operator | Dec 2021 |
| 16530 | Lance Exploration Company | Fort Worth, TX 76102 | Oil & Gas Operator | Jul 1994 |
| 16531 | Lance Gas & Oil Productions | | Oil & Gas Operator | Jan 2025 |
| 16532 | Lance Leasing | Odessa, TX 79765 | Oil Operator | Oct 2025 |
| 16533 | Lance Oil & Gas Company Inc | Kirtland, NM 87417 | Oil & Gas Operator | Mar 2013 |
| 16534 | Lance Oil & Gas Productions | Bloomburg, TX 75556 | Oil & Gas Operator | Oct 2025 |
| 16535 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Jul 2025 |
| 16536 | Lancer Energy Corporation | Oklahoma City, OK 73132-5903 | Oil & Gas Operator | May 2015 |
| 16537 | Lancer Oil, Inc. | Piqua, KS 66761 | Oil Operator | May 2005 |
| 16538 | Lancer Petroleum Corporation | Irving, TX 75014 | Oil & Gas Operator | Feb 2014 |
| 16539 | Lancer Resources Company | | Oil & Gas Operator | Jan 1998 |
| 16540 | Lanco Oil & Gas, Inc. | Richland, TX 76681 | Oil & Gas Operator | Jan 1998 |
| 16541 | Land & Natural Res. Dev., Inc. | | Oil & Gas Operator | Apr 2007 |
| 16542 | Land And Natural Resource Development, Inc. | Northport, AL 35473 | Oil & Gas Operator | Jul 2025 |
| 16543 | Land, Cleatus H. Estate | Seguin, TX 78155 | Oil & Gas Operator | Mar 2001 |
| 16544 | Landaplenty, LLC | Glenville, WV 26351 | Oil & Gas Operator | Dec 2021 |
| 16545 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 16546 | Landers & Musgrove Oil Co. Inc | Okemah, OK 74859-0266 | Oil & Gas Operator | Jan 2018 |
| 16547 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 16548 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Jun 2025 |
| 16549 | Landers Production Company | Granite, OK 73547-0093 | Oil Operator | Apr 2014 |
| 16550 | Landes Explorati | | Oil Operator | Apr 1995 |
| 16551 | Landes, P. Todd, Jr. | Magnolia, AR 71753 | Oil Operator | Apr 1988 |
| 16552 | Landis, Andrew J. And Athanasia | Fredonia, NY 14063 | Gas Operator | Dec 2024 |
| 16553 | Landmark 4 LLC | Dalton, OH 44618-1111 | Oil & Gas Operator | Dec 2024 |
| 16554 | Landmark Drilling, L.L.C. | Waskom, TX 75692 | Oil Operator | Oct 2025 |
| 16555 | Landmark Energy LLC | Seminole, OK 74868 | Oil & Gas Operator | Jun 2025 |
| 16556 | Landmark Energy Partners, LLC | Edmond, OK 73013 | Oil Operator | Jul 2025 |
| 16557 | Landmark Exploration Co | Tulsa, OK 74103 | Oil & Gas Operator | Oct 2013 |
| 16558 | Landmark Exploration Inc. | Caldwell, TX 77836 | Oil & Gas Operator | Oct 2025 |
| 16559 | Landmark Ip, LLC | Houston, TX 77002 | Oil & Gas Operator | Oct 2025 |
| 16560 | Landmark Oil & G | | Oil Operator | Nov 1987 |
| 16561 | Landmark Oil Exp | | Oil Operator | Sep 1994 |
| 16562 | Landmark Operating Company | Welty, OK 74833-3923 | Oil Operator | Aug 2015 |
| 16563 | Landmark Production Company | MC Gregor, TX 76657 | Oil & Gas Operator | Oct 2010 |
| 16564 | Landmark Resources, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2025 |
| 16565 | Landmark Venture Group No. 1, Inc. | | Oil & Gas Operator | Jan 2025 |
| 16566 | Landmark Venture Group, Inc. | | Oil Operator | Dec 2008 |
| 16567 | Landmaster Partners, Inc. | Abilene, TX 79601 | Oil & Gas Operator | Oct 2025 |
| 16568 | Landmen Of Texas | Hondo, TX 78861 | Oil Operator | Feb 2007 |
| 16569 | Landmen Of Texas, Inc. | Hondo, TX 78861 | Oil Operator | Dec 2016 |
| 16570 | Landor Oil Co. | San Marcos, TX 78666 | Oil Operator | Oct 2025 |
| 16571 | Landowner | Honolulu, HI | Oil & Gas Operator | Dec 2008 |
| 16572 | Landprovest Inc | Cambridge, OH 43725 | Oil & Gas Operator | Dec 1993 |
| 16573 | Landreth, Robert E. | Midland, TX 79701 | Oil & Gas Operator | Oct 2025 |
| 16574 | Landrick O & G Operating, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 16575 | Landrum Petroleum Co., Inc. | Burkburnett, TX 76354 | Oil Operator | Mar 2008 |
| 16576 | Landrum West, Inc. | Burkburnett, TX 76354 | Oil & Gas Operator | Dec 1997 |
| 16577 | Landrum, W. A. | Byers, TX 76357 | Oil & Gas Operator | Apr 2002 |
| 16578 | Lane Oil Company, LLC | Northern Cambria, PA 15714 | Oil Operator | Dec 2024 |
| 16579 | Lane Operating Company | Wichita Falls, TX 76301 | Oil & Gas Operator | Oct 2025 |
| 16580 | Lane, Lloyd L. | Buffalo, TX 75831 | Oil Operator | Oct 2025 |
| 16581 | Laneer Resources Company | Abilene, TX 79608 | Oil & Gas Operator | Oct 2025 |
| 16582 | Lanexco, Inc. | Sealy, TX 77474 | Oil & Gas Operator | Oct 2025 |
| 16583 | Lanford Drilling Co., Inc. | | Oil Operator | Jun 1996 |
| 16584 | Lang Herman Oil | | Oil & Gas Operator | Dec 1996 |
| 16585 | Lang Larry D | Beverly, OH 45715 | Oil & Gas Operator | Dec 2024 |
| 16586 | Lang, Herman - Marital Trust | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 16587 | Lang, Kenneth R. | Garden City, KS 67846 | Oil & Gas Operator | Jun 2025 |
| 16588 | Langasco Energy Corp | Alliance, OH 44601 | Oil & Gas Operator | Dec 1987 |
| 16589 | Langford & Brigham Operating LLC | Austin, TX 78730 | Oil & Gas Operator | Oct 2025 |
| 16590 | Langford Production Company, LLC | Haskell, TX 79521 | Oil & Gas Operator | Oct 2025 |
| 16591 | Langford, G. E. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2002 |
| 16592 | Langford, R. C. Operating Co. | Rule, TX 79547 | Oil & Gas Operator | Mar 1994 |
| 16593 | Langham Petroleum Expl. Corp. | Houston, TX 77056 | Oil & Gas Operator | Dec 2009 |
| 16594 | Langley Energy | Euless, TX 76040 | Gas Operator | Jan 2016 |
| 16595 | Langley Harold | Graham, OK 73437 | Oil Operator | Jun 2025 |
| 16596 | Langley, James Operating Company, Inc | Smackover, AR 71762 | Oil & Gas Operator | Jan 2025 |
| 16597 | Langley, Jerry Oil Company LLC | Smackover, AR 71762 | Oil Operator | Jan 2025 |
| 16598 | Langston Oil & Gas LLC | Wichita, KS 67202 | Oil Operator | May 2025 |
| 16599 | Lankford & Nance | | Gas Operator | Dec 2010 |
| 16600 | Lankford Oil Co. | Weatherford, TX 76086 | Oil & Gas Operator | Jul 1999 |