| 3501 | Lario Oil & Gas Company | Odessa, TX 79762 | Oil & Gas Operator | Apr 2025 |
| 3502 | Larkin Energy Company Inc | Sasakwa, OK 74867 | Oil & Gas Operator | May 2022 |
| 3503 | Larkin Oil Co | Sasakwa, OK 74867 | Oil & Gas Operator | Aug 2015 |
| 3504 | Larkspur Operating LLC | Oklahoma City, OK 73034 | Oil & Gas Operator | Jan 2025 |
| 3505 | Larmore Jr James E | Bartlesville, OK 74006-8312 | Oil Operator | Mar 2017 |
| 3506 | Larron Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2015 |
| 3507 | Larry Brown Dba Brown Oil Company | Ardmore, OK 73401 | Oil Operator | Apr 2015 |
| 3508 | Larry Sherman Oil LLC | Chandler, OK 74834 | Oil & Gas Operator | Jan 2025 |
| 3509 | Larry Wolff Dba Wolff'S Oilfield Service | Cushing, OK 74023-9789 | Oil & Gas Operator | Feb 2025 |
| 3510 | Larson Exploration Company | Tulsa, OK 74136-4939 | Oil & Gas Operator | Jul 2016 |
| 3511 | Larson Operating Company | Olmitz, KS 67564-8561 | Oil & Gas Operator | Dec 2019 |
| 3512 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 3513 | Lashley Oil Company Inc | Walters, OK 73572 | Oil Operator | Dec 2014 |
| 3514 | Lasmo Energy Corporation | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2024 |
| 3515 | Last Run, LLC | Rillito, AZ 85246 | Oil & Gas Operator | May 2020 |
| 3516 | Latex Petroleum Corp. | Houston, TX 77090 | Oil & Gas Operator | Aug 2012 |
| 3517 | Latham Roger P C | Dallas, TX 75244 | Oil Operator | Apr 2015 |
| 3518 | Latigo Drilling Corporation | Duncan, OK 73533 | Oil & Gas Operator | Feb 2025 |
| 3519 | Latigo Oil And Gas Inc | Woodward, OK 73801 | Oil & Gas Operator | Feb 2025 |
| 3520 | Latigo Petroleum, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Jan 2025 |
| 3521 | Latigo Petroleum, LLC | Pampa, TX 79066 | Oil & Gas Operator | Apr 2025 |
| 3522 | Lauck & Associates | Walnut Creek, CA 91789 | Oil & Gas Operator | Jan 2025 |
| 3523 | Laughlin Jack D | Cushing, OK 74023 | Oil & Gas Operator | Sep 2016 |
| 3524 | Laurel Operating Company, Inc. | Stillwater, OK 74074-3025 | Oil & Gas Operator | Jan 2025 |
| 3525 | Laverty, Thomas R | | Oil & Gas Operator | Dec 2023 |
| 3526 | Lavrco Energie Inc | Duncan, OK 73533 | Oil & Gas Operator | Oct 2024 |
| 3527 | Law E Edward | Newkirk, OK 74647-2056 | Oil Operator | Dec 2024 |
| 3528 | Lawco Exploration Inc | Bentonville, AR 72712 | Oil & Gas Operator | Aug 2024 |
| 3529 | Lawco Holdings LLC | Bentonville, AR 72712 | Oil Operator | Jan 2025 |
| 3530 | Lawrence Hot Oil Service | Loco, OK 73442 | Oil & Gas Operator | Feb 2025 |
| 3531 | Lawrence James LLC | Guthrie, OK 73044-9622 | Oil & Gas Operator | Feb 2025 |
| 3532 | Lawrence James Oil Prop Inc | Catoosa, OK 74015 | Oil & Gas Operator | Feb 2012 |
| 3533 | Lawrence Roy Drilling Co Inc | Pawnee, OK 74058-0306 | Oil & Gas Operator | Aug 2000 |
| 3534 | Lawrence, C. F. & Assoc. Inc. | Lubbock, TX 79401 | Oil & Gas Operator | Apr 2025 |
| 3535 | Lawson George E | Sand Springs, OK 74063 | Oil & Gas Operator | May 2013 |
| 3536 | Layco Oil | Okmulgee, OK 74447-2065 | Oil & Gas Operator | Apr 2020 |
| 3537 | Layton Oil Co. | | Oil Operator | Feb 1994 |
| 3538 | Lazy H Investment | Chandler, OK 74834 | Oil & Gas Operator | Nov 1993 |
| 3539 | LBJ Production Inc | Okmulgee, OK 74447 | Oil Operator | Nov 1998 |
| 3540 | LCB Resources LLC | Kingfisher, OK 73750-2322 | Oil & Gas Operator | Feb 2025 |
| 3541 | Ldo LLC | Tulsa, OK 74137-3020 | Oil Operator | Feb 2025 |
| 3542 | Le Bas Operating Company, Inc. | Giddings, TX 78942 | Oil & Gas Operator | Mar 2000 |
| 3543 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 3544 | Le Norman Partners LLC | Duncan, OK 73533-9523 | Oil & Gas Operator | Feb 2012 |
| 3545 | Leake Keith D | Winfield, KS 67156-8871 | Oil Operator | Apr 2004 |
| 3546 | Leaman Oil Company | Roland, OK 74954 | Oil & Gas Operator | Apr 2014 |
| 3547 | Lear Petroleum Corp | Houston, TX 77210 | Oil & Gas Operator | Mar 2015 |
| 3548 | Lear Petroleum Exploration Inc | Dallas, TX 75206 | Oil & Gas Operator | Aug 1999 |
| 3549 | Leasehold Management Corp | Oklahoma City, OK 73170 | Oil & Gas Operator | Nov 2024 |
| 3550 | Leatherneck Energy Group Inc | Addison, TX 75001-6025 | Oil & Gas Operator | Apr 2020 |
| 3551 | Leavell Resources Corporation | Hays, KS 67601 | Oil & Gas Operator | Mar 2015 |
| 3552 | Ledford Jan Oil & Gas | Duncan, OK 73533-3210 | Oil Operator | Dec 2024 |
| 3553 | Lee Energy Exploration LTD | Oklahoma City, OK 73102-7114 | Oil & Gas Operator | Jul 2008 |
| 3554 | Lee Energy LLC | Edmond, OK 73034-7668 | Oil Operator | Jan 2005 |
| 3555 | Lee Jr W E | Beggs, OK 74421-2683 | Oil & Gas Operator | May 2013 |
| 3556 | Lee Of Tulsa Oil & Gas Inc | Tulsa, OK 74114-5634 | Oil & Gas Operator | Dec 2021 |
| 3557 | Lee Ron | Emory, TX 75440 | Oil Operator | Feb 2025 |
| 3558 | Leed Energy LLC | Purcell, OK 73080-1383 | Oil & Gas Operator | Jan 2025 |
| 3559 | Leede Oil & Gas Inc. | Greenwood VLG, CO 80111 | Oil & Gas Operator | Aug 2003 |
| 3560 | Leeman Don J | Oklahoma City, OK 73112 | Oil & Gas Operator | Sep 1998 |
| 3561 | Leeman Energy Corporation | Oklahoma City, OK 73118-1802 | Oil & Gas Operator | Mar 2015 |
| 3562 | Lefco Resources LLC | Henryetta, OK 74437 | Gas Operator | Jan 2025 |
| 3563 | Leg Up Operating Company LLC | Tulsa, OK 74135 | Oil Operator | Jan 2025 |
| 3564 | Legacy - M & K Corporation | Dallas, TX 75231-0969 | Oil & Gas Operator | Jan 2025 |
| 3565 | Legacy Energy Services LLC | Stillwater, OK 74074 | Oil & Gas Operator | Jan 2025 |
| 3566 | Legacy Oklahoma Operators LLC | Shawnee, OK 74804-1447 | Oil & Gas Operator | Jan 2025 |
| 3567 | Legacy Petroleum LLC | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2023 |
| 3568 | Legacy Reserves Operating LP | Denver, CO 80201 | Oil & Gas Operator | Apr 2025 |
| 3569 | Legado Midcon, LLC | The Woodlands, TX 77380 | Oil & Gas Operator | May 2010 |
| 3570 | Legend Energy Corporation | Stillwater, OK 74074-1721 | Oil & Gas Operator | Aug 2022 |
| 3571 | Leigh Operating Co | Dallas, TX 75205 | Oil & Gas Operator | Mar 2008 |
| 3572 | Lema Petroleum Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2025 |
| 3573 | Lemley Oil Corporation | Sulphur, OK 73086-9316 | Oil & Gas Operator | Jan 2025 |
| 3574 | Lemmons Jack | Cleveland, OK 74020-7023 | Oil Operator | Jan 2015 |
| 3575 | Lenhart Oil Company | Cashion, OK 73016-0188 | Oil & Gas Operator | Jul 2016 |
| 3576 | Leonard Brothers Operating Co. | Fort Worth, TX 76101 | Oil & Gas Operator | Apr 2025 |
| 3577 | Leonard Vann | | Oil Operator | Feb 2025 |
| 3578 | Leopold Oil Company | Bartlesville, OK 74003 | Oil & Gas Operator | Jan 2025 |
| 3579 | Lerblance Jr W P Estate | Hartshorne, OK 74547-0449 | Oil & Gas Operator | Apr 2020 |
| 3580 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | Jan 2025 |
| 3581 | Levinson Partners Corporation | Denver, CO 80202 | Oil & Gas Operator | Jul 1995 |
| 3582 | Levinson Silvan E | Tulsa, OK 74119 | Oil & Gas Operator | Feb 2012 |
| 3583 | Lewbet Inc | Perry, OK 73077-8914 | Oil & Gas Operator | Aug 2024 |
| 3584 | Lewis A Hembree Production Co | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2025 |
| 3585 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Jan 2025 |
| 3586 | Lewis J K | Duncan, OK 73534-1742 | Oil & Gas Operator | Apr 2015 |
| 3587 | Lewis James D Oil Company | Healdton, OK 73438 | Oil Operator | Jan 2025 |
| 3588 | Lewis John L Well Service | Sasakwa, OK 74867 | Oil Operator | May 2013 |
| 3589 | Lewis Oil And Gas, Inc. | Midland, TX 79710 | Oil & Gas Operator | Apr 2023 |
| 3590 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2025 |
| 3591 | Lewis Oil Operations LLC | Ratliff City, OK 73481 | Oil & Gas Operator | Jan 2025 |
| 3592 | Lewis Operating Company | Holliday, TX 76366 | Oil & Gas Operator | Apr 2025 |
| 3593 | Lewis Resources Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jul 1995 |
| 3594 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 3595 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Dec 2024 |
| 3596 | Lightner Harry A | Cleveland, OK 74020 | Oil & Gas Operator | May 2013 |
| 3597 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 3598 | Lil Dab Petroleum Inc | Duncan, OK 73533 | Oil Operator | Feb 2025 |
| 3599 | Lil-Mor Oil Company | Tulsa, OK 74105 | Oil Operator | Dec 2000 |
| 3600 | Lillard Pipe & Supply Inc | Shawnee, OK 74802-0847 | Oil & Gas Operator | Nov 2014 |