| 401 | Kybenco Disposals LLC | | Oil Operator | Sep 2022 |
| 402 | Lahoma Production Inc | Jenks, OK 74037-0487 | Oil & Gas Operator | Nov 2023 |
| 403 | Laird Anita Louise | Asher, OK 74826-3215 | Oil Operator | Jun 2018 |
| 404 | Laird Bill Oil Company | St Louis, OK 74866-0120 | Oil & Gas Operator | Jan 2024 |
| 405 | Lake Country Disposal II LLC | | Oil Operator | Jan 2024 |
| 406 | Lake Country Disposal LLC | | Oil Operator | Jan 2024 |
| 407 | Lance Ruffel Oil & Gas LLC | Oklahoma City, OK 73102-5632 | Oil & Gas Operator | Feb 2024 |
| 408 | Landers & Musgrove | Okemah, OK 74859 | Oil & Gas Operator | Mar 2015 |
| 409 | Landers & Waldman Inc | Okemah, OK 74859-0660 | Oil & Gas Operator | May 2013 |
| 410 | Landers Oil & Gas Inc | Tulsa, OK 74132-2171 | Oil & Gas Operator | Jan 2024 |
| 411 | Landmark Energy LLC | Seminole, OK 74818-1672 | Oil & Gas Operator | Feb 2024 |
| 412 | Lapetco Inc | Plano, TX 75093 | Oil & Gas Operator | Feb 2024 |
| 413 | Larkin Energy Company Inc | Sasakwa, OK 74867-0006 | Oil & Gas Operator | May 2022 |
| 414 | Larkin Oil Co | Sasakwa, OK 74867 | Oil & Gas Operator | Aug 2015 |
| 415 | Larron Energy Corporation | New Braunfels, TX 78132 | Oil & Gas Operator | Mar 2015 |
| 416 | Las Colinas Oil Corp. | Irving, TX 75062 | Oil & Gas Operator | Mar 2015 |
| 417 | Latigo Drilling Corporation | Duncan, OK 73534-2150 | Oil & Gas Operator | Feb 2024 |
| 418 | Latigo Oil And Gas Inc | Woodward, OK 73802-1208 | Oil & Gas Operator | Feb 2024 |
| 419 | Laverty, Thomas R | | Oil & Gas Operator | Dec 2023 |
| 420 | LCB Resources LLC | | Oil & Gas Operator | Feb 2024 |
| 421 | Le Norman Energy Corporation | Duncan, OK 73534 | Oil & Gas Operator | Nov 2014 |
| 422 | Leasehold Management Corp | Oklahoma City, OK 73109-6925 | Oil & Gas Operator | Jan 2024 |
| 423 | Legacy - M & K Corporation | Dallas, TX 75231-0969 | Oil & Gas Operator | Jan 2024 |
| 424 | Legacy Oklahoma Operators LLC | | Oil & Gas Operator | Jan 2024 |
| 425 | Lema Petroleum Inc | Holdenville, OK 74848-0957 | Oil & Gas Operator | Jan 2024 |
| 426 | Lewis A Hembree Production Co | Shawnee, OK 74802-1725 | Oil & Gas Operator | Jan 2024 |
| 427 | Lewis John L Well Service | Sasakwa, OK 74867-0067 | Oil Operator | May 2013 |
| 428 | Liberty Operating Inc | Norman, OK 73069-8225 | Oil & Gas Operator | Mar 2022 |
| 429 | Likins-Foster Honolulu Corp | Foster City, CA 94404 | Oil & Gas Operator | Feb 2015 |
| 430 | Lillard Pipe & Supply Inc | Shawnee, OK 74802-0847 | Oil & Gas Operator | Nov 2014 |
| 431 | Lindenmuth & Associates Inc | Austin, TX 78703 | Oil & Gas Operator | Feb 2024 |
| 432 | Lion Petroleum Company | Oklahoma City, OK 73120-4503 | Oil & Gas Operator | Aug 2015 |
| 433 | Little River Energy Co. | Drumright, OK 74030 | Oil & Gas Operator | Jan 2024 |
| 434 | Lobar Oil Co LLC | Oklahoma City, OK 73116-1516 | Oil & Gas Operator | Jan 2024 |
| 435 | Lou Dennis Oil Company Inc | Ada, OK 74820-2303 | Oil & Gas Operator | Jun 2016 |
| 436 | Lu-Ray Petroleum LLC | Oklahoma City, OK 73121-1607 | Oil & Gas Operator | Feb 2024 |
| 437 | Lucky Ace Petroleum LLC | Carrollton, TX 75010-4232 | Oil Operator | Oct 2021 |
| 438 | Lucky Four Oil & Gas Company | Sasakwa, OK 74867-0172 | Oil & Gas Operator | Jan 2024 |
| 439 | Lunar Investments Inc | Oklahoma City, OK 73118-4823 | Oil & Gas Operator | Jan 2024 |
| 440 | Luther Oil Inc | Cameron Park, CA 95682-8865 | Oil & Gas Operator | Apr 2020 |
| 441 | LX4 LLC | | Oil Operator | Jan 2024 |
| 442 | Lyon Hoyle | Sasakwa, OK 74867 | Oil Operator | Oct 2023 |
| 443 | M E Klein & Associates LLC | Washington, OK 73070-8106 | Oil & Gas Operator | Feb 2024 |
| 444 | Mac Laskey Kelly Oilfield | El Dorado, KS 67042 | Oil & Gas Operator | Feb 2024 |
| 445 | Macmart Inc | Wynnewood, OK 73098-0337 | Oil & Gas Operator | Jan 2016 |
| 446 | Magic Investments LLC | Edmond, OK 73013-1688 | Oil & Gas Operator | Nov 2023 |
| 447 | Magma Resources LLC | Paoli, OK 73074-0237 | Oil & Gas Operator | Jan 2024 |
| 448 | Magnum Energy Inc | Norman, OK 73072-2403 | Oil & Gas Operator | Feb 2024 |
| 449 | Majors Gary E | Holdenville, OK 74848-9603 | Oil & Gas Operator | Nov 2023 |
| 450 | Marathon Oil Company | Houston, TX 77024 | Oil & Gas Operator | Feb 2024 |
| 451 | Mark A Meier Dba MSC Oil And Gas Co | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2024 |
| 452 | Marlin Oil Corporation | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2024 |
| 453 | Marquise Oil Properties Inc | Konawa, OK 74849 | Oil & Gas Operator | Nov 1992 |
| 454 | Marsh Lonnie C | Konawa, OK 74849-4929 | Oil & Gas Operator | Jan 2024 |
| 455 | Marsh Oil & Gas Company | Pauls Valley, OK 73075-0726 | Oil & Gas Operator | Jan 2024 |
| 456 | Marshall Oil Corporation | Oklahoma City, OK 73154 | Oil & Gas Operator | Apr 2017 |
| 457 | Martin Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Jan 2024 |
| 458 | Mason Robert A Production Co | Edmond, OK 73013-9102 | Oil & Gas Operator | May 2013 |
| 459 | Massad John M | Holdenville, OK 74848-2629 | Oil & Gas Operator | Oct 2017 |
| 460 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 461 | Matthews Kenneth (Butch) | Konawa, OK 74849-0310 | Oil Operator | Jan 2024 |
| 462 | Matthews Oil & Gas | Francis, OK 74844-0357 | Oil & Gas Operator | Jan 2024 |
| 463 | McElroy John | Sapulpa, OK 74066-6119 | Oil & Gas Operator | Jan 2024 |
| 464 | McGhee Exploration And Prod. Co. | Houston, TX 77019 | Oil & Gas Operator | Feb 2003 |
| 465 | McGriff Craig Exploration Inc | Oklahoma City, OK 73172-0364 | Oil & Gas Operator | Mar 2023 |
| 466 | McMillin C C & Company Inc | Guthrie, OK 73044-0546 | Oil & Gas Operator | Jan 2024 |
| 467 | Meadowbrook Oil Corporation Of Ok Inc | Del City, OK 73115-3608 | Oil & Gas Operator | Feb 2024 |
| 468 | Medina-Pierce Oil & Gas Co | | Oil & Gas Operator | Feb 2012 |
| 469 | Mendell Petroleum Corporation | Castle Rock, CO 80104-9045 | Oil & Gas Operator | Sep 2004 |
| 470 | Mercer Oil & Gas Co. | Norman, OK 73070 | Oil & Gas Operator | Apr 2015 |
| 471 | Merelco Inc | Seminole, OK 74868 | Oil Operator | Jun 2014 |
| 472 | Mesa Exploration Company Inc | Dallas, TX 75206-0500 | Oil & Gas Operator | Jan 2024 |
| 473 | Michael Goodnight Operating LLC | Saint Louis, OK 74866-0051 | Oil & Gas Operator | Jan 2024 |
| 474 | Mid-Con Central Expl Co | Tulsa, OK 74136 | Oil & Gas Operator | Aug 2014 |
| 475 | Mid-Con Energy Operating, Inc. | Tulsa, OK 74136 | Oil & Gas Operator | May 2020 |
| 476 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2024 |
| 477 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Jan 2024 |
| 478 | Mikco Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2001 |
| 479 | Miller-McGee Operating Inc | Stroud, OK 74079-0754 | Oil & Gas Operator | Feb 2024 |
| 480 | Milne Lewis Joel | Allen, OK 74825 | Oil & Gas Operator | Mar 2015 |
| 481 | Min-Tex Oil Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Dec 1996 |
| 482 | Minihan Oil And Gas Company | Seminole, OK 74868-9790 | Oil & Gas Operator | Sep 2014 |
| 483 | Minihan Production Co | Seminole, OK 74868 | Oil & Gas Operator | Jan 1997 |
| 484 | Miracle Production Inc | Yukon, OK 73085-0680 | Oil & Gas Operator | Jun 2007 |
| 485 | Miura Petroleum, Inc. | Topeka, KS 66603 | Oil & Gas Operator | May 2006 |
| 486 | Monarch Petroleum Corporation | FT Worth, TX 76102 | Oil & Gas Operator | Dec 2019 |
| 487 | Monexco Operating Company | Dallas, TX 75204-2634 | Oil & Gas Operator | Jan 2024 |
| 488 | Monroe Natural Gas Inc | Norman, OK 73070-5687 | Oil & Gas Operator | Jan 2024 |
| 489 | Montgomery Exploration Co LTD | Dallas, TX 75204-2634 | Oil & Gas Operator | Feb 2024 |
| 490 | Montgomery Jake E | Henryetta, OK 74437 | Oil & Gas Operator | Oct 2023 |
| 491 | Moore David K | Duncan, OK 73575 | Oil & Gas Operator | Oct 2009 |
| 492 | Moore Richard L | Morris, OK 74445 | Oil Operator | Aug 2013 |
| 493 | Moran Oil Enterprises, LLC | Seminole, OK 74818 | Oil & Gas Operator | Dec 2023 |
| 494 | Moran-K Oil LLC | Seminole, OK 74818-1295 | Oil & Gas Operator | Feb 2024 |
| 495 | Moran-Kahn Oil | Seminole, OK 74868 | Oil & Gas Operator | Mar 1992 |
| 496 | Morrison International Energy Inc | Oklahoma City, OK 73189-0537 | Oil & Gas Operator | Dec 2023 |
| 497 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Feb 2024 |
| 498 | Muras Energy, Inc. | Edmond, OK 73013 | Oil & Gas Operator | Jan 2024 |
| 499 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Feb 2024 |
| 500 | MXP Operating LLC | | Oil & Gas Operator | Feb 2024 |