| 401 | Jay Petroleum Inc | Oklahoma City, OK 73154-0526 | Oil & Gas Operator | Mar 2019 |
| 402 | JBD Oklahoma, L.L.C. | | Oil & Gas Operator | Jan 2025 |
| 403 | Jedd Oil Co | Hominey, OK 74035 | Oil & Gas Operator | Jan 2025 |
| 404 | Jeffries Pumping Service Inc | Guthrie, OK 73044-8761 | Oil & Gas Operator | Jan 2025 |
| 405 | Jenkins Charles L | Edmond, OK 73083-3610 | Oil Operator | Jul 1996 |
| 406 | Jireh Resources LLC | Tulsa, OK 74170-1230 | Oil Operator | Jan 2025 |
| 407 | Joint Resources Company | Fort Worth, TX 76107 | Oil & Gas Operator | Apr 2025 |
| 408 | Jones And Buck | Sedan, KS 67361 | Oil & Gas Operator | Jan 2025 |
| 409 | Jones Jr Lee R | Sedan, KS 67361 | Oil & Gas Operator | Jun 2008 |
| 410 | Jones Michael | Pawhuska, OK 74056 | Oil Operator | Jan 1995 |
| 411 | Jones, Bobby E | | Oil Operator | Nov 2005 |
| 412 | Jovian Petroleum Corporation | Houston, TX 77024 | Oil & Gas Operator | Jan 2016 |
| 413 | JSD Resources Corporation | Barnsdall, OK 74002-3272 | Oil & Gas Operator | Jan 2025 |
| 414 | Jse Investments Inc | Skiatook, OK 74070 | Oil Operator | Jan 2025 |
| 415 | K G Operating | Hennessey, OK 73742 | Oil & Gas Operator | May 1999 |
| 416 | K-C Oil Co. | Luling, TX 78648 | Oil & Gas Operator | Jan 2013 |
| 417 | Kahan And Associates, Inc | Tulsa, OK 74170 | Oil & Gas Operator | Jan 2025 |
| 418 | Kantor Oil Company, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Jan 2025 |
| 419 | Kelley Joe Bob | Barnsdall, OK 74002 | Oil & Gas Operator | Jan 2025 |
| 420 | Kemp Roy L | | Oil Operator | Jan 2011 |
| 421 | Kennedy Tracy | Wynona, OK 74084 | Oil Operator | Jan 2025 |
| 422 | Kennedy, Howard E | | Oil & Gas Operator | May 1997 |
| 423 | Kerbs Daris | Bartlesville, OK 74003 | Oil Operator | Jul 2018 |
| 424 | Keystone Gas Corporation | Drumright, OK 7403O | Oil & Gas Operator | Apr 2015 |
| 425 | Keystone Oil And Gas Company LLC | Collinsville, OK 74021 | Oil & Gas Operator | Dec 2024 |
| 426 | Kiamichi Resources Inc | Oklahoma City, OK 73143 | Oil & Gas Operator | Feb 2016 |
| 427 | Kile Production | Cypress, TX 77410 | Oil & Gas Operator | Aug 2014 |
| 428 | KJB Oil Company LLC | Dewey, OK 74029-3053 | Oil Operator | Nov 2024 |
| 429 | Klabzuba Royalty Company | Prague, OK 74864-0567 | Oil & Gas Operator | Dec 2019 |
| 430 | Klo LLC | Tulsa, OK 74120-2428 | Oil & Gas Operator | Feb 2025 |
| 431 | Koch Hydrocarbon Company | Wichita, KS 67220-3203 | Oil & Gas Operator | Nov 2014 |
| 432 | Koch Oil Company | | Oil & Gas Operator | May 2017 |
| 433 | Kornblit, Majir | | Oil Operator | Nov 1998 |
| 434 | Krebbs A N & Kay | Pawhuska, OK 74056 | Oil Operator | Jan 2025 |
| 435 | Krebbs, David B | | Oil & Gas Operator | Jan 2025 |
| 436 | Krotzer Oil Company | Cleveland, OK 74020 | Oil & Gas Operator | Feb 2025 |
| 437 | Krumme Oil Company LLP | Bristow, OK 74010 | Oil & Gas Operator | Jan 2025 |
| 438 | KSW Operating LLC | Bartlesville, OK 74006 | Oil & Gas Operator | Mar 2015 |
| 439 | KWB Oil Property Management Inc | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2025 |
| 440 | Kyler Oil Company | Pawhuska, OK 74056-0117 | Oil Operator | Nov 1998 |
| 441 | L & L Producers | Independnce, KS 67301 | Oil Operator | Jan 2025 |
| 442 | L B G Operating Co | Fairfax, OK 74037 | Oil & Gas Operator | Oct 2014 |
| 443 | Lamamco Drilling Company | Skiatook, OK 74070 | Oil & Gas Operator | Jan 2025 |
| 444 | Laml Compaines LLC | Cleveland, OK 74020 | Oil Operator | Jan 2025 |
| 445 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Feb 2025 |
| 446 | Latigo Oil And Gas Inc | Woodward, OK 73801 | Oil & Gas Operator | Feb 2025 |
| 447 | Laverty, Thomas R | | Oil & Gas Operator | Dec 2023 |
| 448 | Lawco Exploration Inc | Bentonville, AR 72712 | Oil & Gas Operator | Aug 2024 |
| 449 | Lawco Holdings LLC | Bentonville, AR 72712 | Oil Operator | Jan 2025 |
| 450 | Lawrence Roy Drilling Co Inc | Pawnee, OK 74058-0306 | Oil & Gas Operator | Aug 2000 |
| 451 | Lawson George E | Sand Springs, OK 74063 | Oil & Gas Operator | May 2013 |
| 452 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 453 | Leg Up Operating Company LLC | Tulsa, OK 74135 | Oil Operator | Jan 2025 |
| 454 | Legacy Petroleum LLC | Tulsa, OK 74135 | Oil & Gas Operator | Dec 2023 |
| 455 | Leopold Oil Company | Bartlesville, OK 74003 | Oil & Gas Operator | Jan 2025 |
| 456 | Lester Joan | Sand Springs, OK 74063 | Oil & Gas Operator | Jan 2025 |
| 457 | Lewis A Hembree Production Co | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2025 |
| 458 | Lewis Energy LLC | Tulsa, OK 74159 | Oil Operator | Jan 2025 |
| 459 | Lewis Oil Corp. | Stillwater, OK 74076 | Oil & Gas Operator | Jan 2025 |
| 460 | Lewis, R. J. Oil Company | Stillwater, OK 74076 | Oil & Gas Operator | Apr 2014 |
| 461 | Lightner Harry A | Cleveland, OK 74020 | Oil & Gas Operator | May 2013 |
| 462 | Lil-Mor Oil Company | Tulsa, OK 74105 | Oil Operator | Dec 2000 |
| 463 | Lincoln Ventures LLC | Inola, OK 74036-5035 | Oil & Gas Operator | Jan 2025 |
| 464 | Link Oil Company (The) | Tulsa, OK 74103-4113 | Oil & Gas Operator | Jan 2014 |
| 465 | Little Bear Oil & Gas Co LTD | Boca Rotan, FL 33431 | Oil & Gas Operator | Jan 1997 |
| 466 | Little Chief Energy Corporation | Independence, KS 67301 | Oil Operator | Jan 2025 |
| 467 | Little River Energy Company | Drumright, OK 74030 | Oil & Gas Operator | Feb 2025 |
| 468 | Locke Stock & Barrel Res Inc | Calgary, AB T2P3G | Oil Operator | Nov 1998 |
| 469 | Long John P Jr | Pawhuska, OK 74056 | Oil & Gas Operator | Jan 2025 |
| 470 | Long SR John | Avant, OK 74001 | Oil Operator | Jan 2025 |
| 471 | Longacre-Moore Oil Co | | Oil & Gas Operator | Jun 1996 |
| 472 | Lonnie Ware | Wynona, OK 74084 | Oil & Gas Operator | Jan 2025 |
| 473 | Louis Dreyfus Gas Marketing | Oklahoma City, OK 73134 | Oil & Gas Operator | Mar 2018 |
| 474 | Lowery Roger | Duncan, OK 73534-0040 | Oil & Gas Operator | Sep 2012 |
| 475 | Lynan Energy Inc | Oklahoma City, OK 73120 | Oil & Gas Operator | May 2013 |
| 476 | Lynn William R | Pawhuska, OK 74056 | Oil & Gas Operator | May 2013 |
| 477 | M & H Enterprises | Bartlesville, OK 74006-5504 | Oil & Gas Operator | Jan 2013 |
| 478 | M E Klein & Associates LLC | Washington, OK 73093-4663 | Oil & Gas Operator | Feb 2025 |
| 479 | M-S-C Corporation | Houston, TX 77027 | Oil Operator | May 1994 |
| 480 | Mac Engineering & Operating Co | | Oil & Gas Operator | May 2005 |
| 481 | Maggard Supply & Oil Company | Mannford, OK 74044-1407 | Oil & Gas Operator | Nov 2014 |
| 482 | Magnolia Petroleum Inc | Tulsa, OK 74106-2433 | Oil Operator | Jun 2018 |
| 483 | Maguire Oil Company | Dallas, TX 75270 | Oil & Gas Operator | Mar 2015 |
| 484 | Mahan Jim And Janet | Collinsville, OK 74021 | Oil & Gas Operator | Jan 2025 |
| 485 | Majoil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Dec 1996 |
| 486 | Maloney Helen V Dba Penn-Ok Corporation | Hockessin, DE 19707-9640 | Oil & Gas Operator | Dec 2024 |
| 487 | Manuel Corporation | Wichita, KS 67206 | Oil & Gas Operator | Jan 2025 |
| 488 | Marco Oil Co, Inc | Sparta, KY 41086 | Oil Operator | Dec 2021 |
| 489 | Marco Oil Company LLC | Bartlesville, OK 74005 | Oil & Gas Operator | Jan 2025 |
| 490 | Mariah Exploration LLC | Pawhuska, OK 74056 | Oil & Gas Operator | Oct 2008 |
| 491 | Marlin Oil & Gas | Pawhuska, OK 74056 | Oil Operator | Jan 2025 |
| 492 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2025 |
| 493 | Marmac Resources Co. | Los Angeles, CA 90027 | Oil & Gas Operator | Mar 2015 |
| 494 | Marmac Resources Inc | | Oil Operator | Nov 1998 |
| 495 | Martin Jim & Julie | Wynona, OK 74084 | Oil & Gas Operator | Jan 2025 |
| 496 | Martin John R | Cushing, OK 74023 | Oil & Gas Operator | Apr 1995 |
| 497 | Mauldin Robert | Barnsdall, OK 74002 | Oil Operator | Jan 2025 |
| 498 | Mayabb Oil Company Inc | Tulsa, OK 74105-5158 | Oil & Gas Operator | Jan 2025 |
| 499 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Apr 2025 |
| 500 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Apr 2025 |