| 401 | Key Oil Company | Duncan, OK 73533 | Oil & Gas Operator | Dec 2021 |
| 402 | Keyrock Energy LLC | Johnson City, TN 37604-5749 | Oil & Gas Operator | Dec 2024 |
| 403 | Kimco Inc. | Spencer, WV 25276-1007 | Oil & Gas Operator | Dec 2021 |
| 404 | Kines, James E | Philippi, WV 26416-8336 | Gas Operator | Dec 2021 |
| 405 | King Gas Company | Huntington, WV 25709 | Gas Operator | Dec 2021 |
| 406 | Kinzer, J. W. | | Oil & Gas Operator | Dec 2006 |
| 407 | Kirkconnell And Associates | | Oil & Gas Operator | Dec 1996 |
| 408 | Kirtley, Ralph | | Oil & Gas Operator | Dec 2005 |
| 409 | Klug, E A & A J (Estate) | Proctor, WV 26055-0000 | Oil & Gas Operator | Dec 2021 |
| 410 | Knobler, Alfred E | | Oil & Gas Operator | Dec 2003 |
| 411 | Knotts Brothers | Orma, WV 25268-0000 | Oil & Gas Operator | Dec 2021 |
| 412 | Knox Energy Inc | New Albany, OH 43054 | Oil & Gas Operator | Dec 2024 |
| 413 | Kocher And Westfall | Middlebourne, WV 26149 | Oil Operator | Dec 2021 |
| 414 | Kodiak Petroleum Corp. | Wichita Falls, TX 76308 | Oil & Gas Operator | Oct 1996 |
| 415 | Krakrow, Inc. | Spencer, WV 25276-1007 | Oil & Gas Operator | Dec 2021 |
| 416 | Kramer Exploration Co. | Delaware, OH 43015 | Oil & Gas Operator | Dec 2009 |
| 417 | Kudella, Ron & Cline, Russell | | Oil & Gas Operator | Feb 2021 |
| 418 | KV Oil & Gas, Inc. | | Oil & Gas Operator | Dec 2006 |
| 419 | L.K. Energies, Inc. | | Oil & Gas Operator | Dec 2002 |
| 420 | Lamar Oil & Gas Co., Inc. | | Oil & Gas Operator | Dec 2021 |
| 421 | Lamb, William Michael | Smithville, WV 26178 | Oil & Gas Operator | Dec 2021 |
| 422 | Lancaster, Randy L. Dba Heritage Oil & Gas | Middlebourne, WV 26149 | Oil & Gas Operator | Dec 2021 |
| 423 | Landaplenty, LLC | Glenville, WV 26351 | Oil & Gas Operator | Dec 2021 |
| 424 | Larch Oil & Gas Corporation | Cross Lanes, WV 25313 | Oil & Gas Operator | Dec 2021 |
| 425 | Lasco Production Co | | Oil & Gas Operator | Dec 1999 |
| 426 | LBJ Energy Associates, LLC | Staunton,, VA 24402 | Oil & Gas Operator | Dec 2021 |
| 427 | Leatherwood, LLC | Canonsburg, PA 15317-6506 | Oil & Gas Operator | Dec 2023 |
| 428 | Leland Petroleum Production Inc | | Oil & Gas Operator | Dec 2007 |
| 429 | Lemasters, Charles A. | Jacksonburg, WV 26377-0000 | Oil & Gas Operator | Dec 2021 |
| 430 | Leonard, Jon N And Dottie L | Williamstown, WV 26187 | Gas Operator | Dec 2021 |
| 431 | Linn Operating LLC | Houston, TX 77002 | Oil & Gas Operator | Jan 2019 |
| 432 | Lippizan Petroleum, Inc. | Ellenboro, WV 26346 | Oil & Gas Operator | Dec 2024 |
| 433 | Lipps, Alfred J. | Burnsville, WV 26355-0000 | Oil & Gas Operator | Sep 2017 |
| 434 | Loan Asset Issuer LLC, Series 2021 NG-1 | New York, NY 10022 | Oil & Gas Operator | Mar 2025 |
| 435 | Locin Oil Corporation | Katy, TX 77494 | Oil & Gas Operator | May 2025 |
| 436 | Lock 3 Company | Pittsburgh, PA 15220 | Oil & Gas Operator | Dec 2017 |
| 437 | Lone Pine Operating Company, Inc. | Salem, WV 26426 | Oil & Gas Operator | Dec 2021 |
| 438 | Low Gap L.L.C. | Cairo, WV 26337 | Gas Operator | Dec 2020 |
| 439 | Lowther, Dan M | Alum Bridge, WV 26321 | Oil & Gas Operator | Dec 2020 |
| 440 | Lucas Well Service, Inc. | Parkersburg, WV 26101 | Oil & Gas Operator | Dec 2021 |
| 441 | Lydic, W. J., Inc. | Zanesville, OH 43702-2310-2310 | Oil & Gas Operator | Jan 2005 |
| 442 | M & A Well Service, Inc. | Arnoldsburg, WV 25234-0000 | Oil & Gas Operator | Dec 2021 |
| 443 | M & M Drilling | Spencer, WV 25276-0905 | Oil & Gas Operator | Dec 2021 |
| 444 | M & M Drilling, Inc. | Spencer, WV 25276-0905 | Oil & Gas Operator | Dec 2021 |
| 445 | M V Crum Gas Partners | Paintsville, KY 41240 | Gas Operator | Dec 2021 |
| 446 | M4 Energy, LLC | Watsontown, PA 17777-1133 | Oil & Gas Operator | Dec 2024 |
| 447 | Macdonald Spidel | | Oil & Gas Operator | Dec 2021 |
| 448 | Macfarlan Oil And Gas, LLC | Ellenboro, WV 26346-0058 | Oil & Gas Operator | Dec 2021 |
| 449 | Magnum Oil & Gas Inc. | Linn, WV 26384 | Gas Operator | Dec 2021 |
| 450 | Mahue Construction Company | Huntington, WV 25724-2345 | Oil & Gas Operator | Dec 2021 |
| 451 | Malvern Group Inc | Clearwater, FL 33758-6817-6817 | Oil & Gas Operator | Mar 2005 |
| 452 | Mann Energy, Inc. | Charleston, WV 25332-3242 | Oil & Gas Operator | Nov 2018 |
| 453 | Maranatha Energy Corporation | Athens, WV 24712 | Oil & Gas Operator | Dec 2021 |
| 454 | Marathon Oil Company | Houston, TX 77252 | Oil & Gas Operator | Mar 2025 |
| 455 | Marks & Co., Inc. | | Oil & Gas Operator | Dec 2021 |
| 456 | Marsh Operating Company | Dallas, TX 75221 | Oil & Gas Operator | Jan 2025 |
| 457 | Marshall, Dale | | Gas Operator | Dec 1995 |
| 458 | Massey Group, Inc. | | Oil & Gas Operator | Dec 2004 |
| 459 | May Gas, Inc. | | Oil & Gas Operator | Dec 2008 |
| 460 | McCarty, Charles E | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 461 | McCullough, Richard F. | Pennsboro, WV 26415 | Oil & Gas Operator | Dec 2021 |
| 462 | MCF Co. | | Oil & Gas Operator | Dec 2011 |
| 463 | McIntosh Oil & Gas, Inc. | Coalton, WV 26257 | Oil & Gas Operator | Dec 2021 |
| 464 | McKinney, Jason G. | | Oil Operator | Dec 2021 |
| 465 | McRain Petroleum | Weston, WV 26452-0000 | Oil & Gas Operator | Dec 2020 |
| 466 | MDW Capital, Inc. | Williamstown, WV 26187 | Oil & Gas Operator | Dec 2021 |
| 467 | Meadow Ridge Development, LLC | Washington, PA 15301 | Oil & Gas Operator | Dec 2021 |
| 468 | Meadows Jr, S. L. Production Inc. | Ravenswood, WV 26164-0022 | Oil & Gas Operator | Dec 2021 |
| 469 | Megaenergy Operating, Inc. | Edmond, OK 73034 | Oil & Gas Operator | Jul 2015 |
| 470 | Megan Oil & Gas Co., Inc. | Spencer, WV 25276-0000 | Oil & Gas Operator | Dec 2021 |
| 471 | Meridian Exploration Corp. | Pittsburgh, PA 15222 | Oil & Gas Operator | Dec 2021 |
| 472 | Mert Development Inc | | Oil & Gas Operator | Dec 2021 |
| 473 | Mid-Eastern Oil & Gas Co. | Burton, WV 26562-0000 | Oil & Gas Operator | Dec 2021 |
| 474 | Mid-Penn Energy Corporation | Harrisburg, PA 17101-1002 | Gas Operator | Dec 2021 |
| 475 | Midway City Gas Company | Huntington, WV 25701 | Oil & Gas Operator | Dec 2018 |
| 476 | Milhoan, Douglas L And Janet L | Belleville, WV 26133 | Gas Operator | Dec 2021 |
| 477 | Miller, Allerton | | Oil & Gas Operator | Dec 1997 |
| 478 | Mills Drilling Co Inc | | Oil & Gas Operator | Nov 2008 |
| 479 | Milton Oil & Gas Company | Charleston, WV 25322 | Gas Operator | Nov 1997 |
| 480 | Mineral Resource Management, L.L.C. | Jane Lew, WV 26378 | Oil & Gas Operator | Dec 2021 |
| 481 | Minuteman Drilling | | Gas Operator | Dec 2021 |
| 482 | MLX Operating, Inc. | Bridgeport, WV 26330 | Oil & Gas Operator | Dec 2021 |
| 483 | Monge Oil Corp. | | Oil & Gas Operator | Dec 2021 |
| 484 | Montani Energy, LLC | Smithville, WV 26178 | Gas Operator | Dec 2021 |
| 485 | Monticola Exploration & Production, Inc. | | Gas Operator | Dec 2021 |
| 486 | Moody Oil & Gas Co. | Bridgeport, WV 26330-1051 | Oil & Gas Operator | Dec 2004 |
| 487 | Moonlight Oil And Gas, LLC | | Oil & Gas Operator | Dec 2021 |
| 488 | Morris Beall Oil & Gas Co | | Oil & Gas Operator | Dec 2021 |
| 489 | Morris Oil & Gas Co., Inc | | Oil & Gas Operator | Dec 2021 |
| 490 | Morris, Carl R | | Oil & Gas Operator | Dec 2015 |
| 491 | Moses Gas, Inc. | Indore, WV 25111-0100 | Gas Operator | Dec 2018 |
| 492 | Mossor, Kenneth Everett | Ellenboro, WV 26346-0057 | Oil & Gas Operator | Dec 2021 |
| 493 | Mossor, L. E. | Harrisville, WV 26362-0000 | Oil & Gas Operator | Dec 2002 |
| 494 | Motto Energy Inc. | Normantown, WV 25267-8215 | Oil & Gas Operator | Dec 2021 |
| 495 | Mountain State Oil Company, L..L.C. | Pennsboro, WV 26415-0014 | Oil & Gas Operator | Dec 2021 |
| 496 | Mountain State Well Tending | Hurricane, WV 25526-0000 | Oil & Gas Operator | Dec 2021 |
| 497 | Mountain V Oil & Gas, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 498 | Mountain V, LLC | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 499 | Mountaineer Gas Transmission, Inc. | Fort Worth, TX 76185-0000 | Oil & Gas Operator | Dec 2021 |
| 500 | Mountaineer State Energy, Inc. | Dallas, TX 75234 | Oil & Gas Operator | Dec 2021 |