| 3501 | Little Bear Oil & Gas Co LTD | Boca Rotan, FL 33431 | Oil & Gas Operator | Jan 1997 |
| 3502 | Little Bear Resources LLC | Stillwater, OK 74074-1388 | Oil & Gas Operator | Feb 2013 |
| 3503 | Little Chicago Oil & Gas Inc | Edmond, OK 73034-0809 | Oil & Gas Operator | Dec 2017 |
| 3504 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Dec 2025 |
| 3505 | Little O Oil Company | Velma, OK 73091-0425 | Oil & Gas Operator | Apr 2015 |
| 3506 | Little Oil Company LLC | Cushing, OK 74023 | Oil Operator | Dec 2025 |
| 3507 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Jan 2026 |
| 3508 | Little Thunder, LLC | Bartlesville, OK 74003 | Oil Operator | Dec 2025 |
| 3509 | Littrell Chemical Inc | Cleo Springs, OK 73729 | Oil & Gas Operator | Jan 2005 |
| 3510 | Litzenberger Exploration | Waynoka, OK 73860 | Oil & Gas Operator | Jul 1996 |
| 3511 | Litzenberger Exploration Inc | Waynoka, OK 73860 | Oil & Gas Operator | Jan 2026 |
| 3512 | Lo-Jel Energy LLC | Oklahoma City, OK 73162-7418 | Oil & Gas Operator | Nov 2019 |
| 3513 | Lobar Oil Co LLC | Edmond, OK 73013 | Oil & Gas Operator | Dec 2025 |
| 3514 | Lobo Energy, Inc. | Laredo, TX 78044 | Oil & Gas Operator | Nov 1996 |
| 3515 | Lobo Exploration Company | Yukon, OK 73099 | Oil & Gas Operator | Dec 2025 |
| 3516 | Lobo Petroleum Inc | Guymon, OK 73942-0714 | Oil Operator | Jul 2016 |
| 3517 | Locators Oil And Gas Inc | Guthrie, OK 73044 | Oil & Gas Operator | Oct 2022 |
| 3518 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | Mar 2026 |
| 3519 | Locke Stock & Barrel Res Inc | Calgary, AB T2P3G | Oil Operator | Nov 1998 |
| 3520 | Loco Oil Company | Loco, OK 73442 | Oil Operator | Feb 1993 |
| 3521 | Lodestone Operating, Inc. | Portland, TX 78374 | Oil & Gas Operator | Mar 2026 |
| 3522 | Logan Productions LLC | Wewoka, OK 74884 | Oil Operator | May 2025 |
| 3523 | Loki Oil LLC | Cushing, OK 74023 | Oil & Gas Operator | Nov 2024 |
| 3524 | Loman Linda Gann | Norman, OK 73069-6548 | Oil Operator | Apr 2011 |
| 3525 | London William W | Oklahoma City, OK 73116 | Oil & Gas Operator | Nov 2015 |
| 3526 | London William W Inc | Oklahoma City, OK 73116-5116 | Oil & Gas Operator | Apr 2016 |
| 3527 | Lone Star Resources Company | Keyes, OK 73947 | Oil & Gas Operator | Mar 2015 |
| 3528 | Lone Tree Oil & Gas LLC | Greenwood VLG, CO 80111 | Oil & Gas Operator | Mar 2026 |
| 3529 | Long Engineering Company Inc | Oklahoma City, OK 73112-7769 | Oil Operator | Jun 2008 |
| 3530 | Long George L | San Antonio, TX 78209 | Oil & Gas Operator | Feb 1996 |
| 3531 | Long Phillip C | Muskogee, OK 74403 | Oil & Gas Operator | May 2013 |
| 3532 | Long Production LLC | Claremore, OK 74017-2808 | Oil & Gas Operator | Oct 2019 |
| 3533 | Long Resources Inc | Austin, TX 78730 | Oil & Gas Operator | Jan 2026 |
| 3534 | Long Royalty Company | Yukon, OK 73085 | Oil & Gas Operator | Jan 2004 |
| 3535 | Long, James A | | Oil Operator | Aug 2000 |
| 3536 | Long, John P | | Oil & Gas Operator | Dec 2025 |
| 3537 | Longacre Oil & Gas | Enid, OK 73702 | Oil & Gas Operator | Mar 2013 |
| 3538 | Longberry Energy Inc | Keota, OK 74941 | Gas Operator | Jan 2026 |
| 3539 | Longbranch Oil Company | Oklahoma City, OK 73154-0735 | Oil & Gas Operator | Mar 2018 |
| 3540 | Longfellow Energy, LP | Dallas, TX 75225 | Oil & Gas Operator | Mar 2026 |
| 3541 | Longhorn Estates & Cattle Co. LLC | Jennings, OK 74038 | Oil Operator | Dec 2025 |
| 3542 | Longhurst Oil & Gas Inc | | Oil & Gas Operator | Nov 2013 |
| 3543 | Longview Production Company | Dallas, TX 75243-3795 | Oil & Gas Operator | Dec 2025 |
| 3544 | Lord Enterprises Inc | Oklahoma City, OK 73106-5050 | Oil & Gas Operator | Sep 2000 |
| 3545 | Lorentz Oil & Gas LLC | Edmond, OK 73034-7266 | Oil & Gas Operator | Dec 2025 |
| 3546 | Loto Energy LLC | Saint Louis, MO 63105 | Oil & Gas Operator | Jan 2026 |
| 3547 | Lou Dennis Oil Company Inc | Ada, OK 74820-2303 | Oil & Gas Operator | Jun 2016 |
| 3548 | Louisiana Land & Exploration Co. | Houston, TX 77210 | Oil & Gas Operator | Sep 2013 |
| 3549 | Lovell Keith | Stillwater, OK 74074-6459 | Oil & Gas Operator | Jan 2020 |
| 3550 | Loving Company (The) | Broken Arrow, OK 74014-0001 | Oil & Gas Operator | May 2013 |
| 3551 | Lowe Kenneth | Jennings, OK 74038 | Oil & Gas Operator | Sep 2025 |
| 3552 | Lowery Roger | Duncan, OK 73534-0040 | Oil & Gas Operator | Sep 2012 |
| 3553 | Lowry Exploration Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2025 |
| 3554 | LR Energy, Inc. | Dallas, TX 75206 | Oil & Gas Operator | Sep 2025 |
| 3555 | Lre Operating, LLC | Houston, TX 77002 | Oil & Gas Operator | Nov 2016 |
| 3556 | LRR IV Operating Inc | Houston, TX 77002 | Oil & Gas Operator | Dec 2025 |
| 3557 | LTJ Enterprises LLC | Lone Grove, OK 73443 | Oil & Gas Operator | May 2025 |
| 3558 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Jan 2026 |
| 3559 | Lubell Oil Company | Tulsa, OK 74103 | Gas Operator | Jul 1993 |
| 3560 | Lucky Ace Petroleum LLC | Carrollton, TX 75010-4232 | Oil Operator | Oct 2021 |
| 3561 | Lucky Four Oil & Gas Company | Sasakwa, OK 74867 | Oil & Gas Operator | Dec 2025 |
| 3562 | Lucky Oil Company | Comanche, OK 73529-0009 | Oil Operator | Dec 2025 |
| 3563 | Lucre Oil Company | Muskogee, OK 74401-5099 | Oil & Gas Operator | Jun 2019 |
| 3564 | Luke Oil Company | Bristow, OK 74010 | Oil & Gas Operator | Jan 2026 |
| 3565 | Lunar Investments Inc | Oklahoma City, OK 73118-4823 | Oil & Gas Operator | Dec 2025 |
| 3566 | Lundy Linda Susan | Council Hill, OK 74428 | Oil Operator | Dec 2025 |
| 3567 | Luther Oil Inc | Cameron Park, CA 95682-8865 | Oil & Gas Operator | Apr 2020 |
| 3568 | Luween Energy LLC | Oklahoma City, OK 73128 | Oil & Gas Operator | Dec 2025 |
| 3569 | Lvi Enterprises Trust | Plano, TX 75093-7789 | Oil & Gas Operator | Nov 2014 |
| 3570 | LVM Oil Production LLC | Yale, OK 74085-6688 | Oil & Gas Operator | Jul 2021 |
| 3571 | LX4, LLC | | Oil Operator | Jan 2026 |
| 3572 | LXS Inc | Stigler, OK 74462-0506 | Gas Operator | Nov 2013 |
| 3573 | Lyda Gerald SR X Bar Ranch | San Antonio, TX 78268-0907 | Oil & Gas Operator | Feb 1994 |
| 3574 | Lynan Energy Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |
| 3575 | Lynn William R | Pawhuska, OK 74056 | Oil & Gas Operator | May 2013 |
| 3576 | Lynx Energy Company, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2008 |
| 3577 | Lynx Oklahoma Operating LLC | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 2025 |
| 3578 | Lynx Operating Co., Inc. | Dallas, TX 75206 | Oil & Gas Operator | Mar 2026 |
| 3579 | Lyon Energy, Inc. | Plano, TX 75075 | Oil & Gas Operator | Feb 2000 |
| 3580 | Lyon Hoyle | Sasakwa, OK 74867 | Oil Operator | Sep 2025 |
| 3581 | Lyons & Lyons Inc | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2025 |
| 3582 | Lyric Energy, Inc. | Amarillo, TX 79105 | Oil & Gas Operator | Mar 1996 |
| 3583 | M & D Oil & Gas | Levelland, TX 79336 | Oil & Gas Operator | Aug 2000 |
| 3584 | M & D Pumping Service Inc | Ringwood, OK 73768-3415 | Oil & Gas Operator | Jan 2026 |
| 3585 | M & H Enterprises | Bartlesville, OK 74006-5504 | Oil & Gas Operator | Jan 2013 |
| 3586 | M & M Exploration Inc | Westminster, CO 80031 | Oil & Gas Operator | Jan 2026 |
| 3587 | M & M Petroleum Company | Mannford, OK 74044-0462 | Oil Operator | Apr 2020 |
| 3588 | M & M Resources Inc | Oklahoma City, OK 73156 | Oil & Gas Operator | Sep 2018 |
| 3589 | M & S Oil Co | Lawrenceburg, IN 47025-8675 | Oil & Gas Operator | Aug 2000 |
| 3590 | M & S Operating LLC | Oklahoma City, OK 73112 | Oil Operator | Mar 1999 |
| 3591 | M & T Oil Company | Copan, OK 74022 | Oil Operator | Dec 2025 |
| 3592 | M & T Production Company LLC | Tulsa, OK 74132-3742 | Oil Operator | Apr 2011 |
| 3593 | M And V Resources Inc | Crescent, OK 73028 | Oil & Gas Operator | Dec 2025 |
| 3594 | M C L Company LTD | Edmond, OK 73083-6243 | Oil & Gas Operator | Jul 2001 |
| 3595 | M E Booth Corporation | Ada, OK 74820 | Oil Operator | Dec 2025 |
| 3596 | M E Klein & Associates LLC | Washington, OK 73093-4663 | Oil & Gas Operator | Jan 2026 |
| 3597 | M G Energy LLC | Cushing, OK 74023 | Oil & Gas Operator | Dec 2025 |
| 3598 | M H Oil & Gas LLC | Okeene, OK 73763-0684 | Oil & Gas Operator | Feb 2013 |
| 3599 | M J M D Inc | Burlington, IA 52601 | Oil Operator | Jan 2013 |
| 3600 | M K W Inc | Oklahoma City, OK 73112-8884 | Oil & Gas Operator | Dec 2009 |