| 17401 | M-V Company | Refugio, TX 78377 | Oil & Gas Operator | Jun 2004 |
| 17402 | M-W-D Oil Co. | Odessa, TX 79760 | Oil & Gas Operator | Jul 1999 |
| 17403 | M. A. B. Production | | Oil Operator | Nov 2009 |
| 17404 | M. A. Robison | | Oil & Gas Operator | Oct 1998 |
| 17405 | M. B. And D. I. Dupree | | Oil Operator | Nov 1992 |
| 17406 | M. D. & G. Partnership | | Oil & Gas Operator | Dec 1996 |
| 17407 | M. E. Fitzgerald | | Oil & Gas Operator | May 1993 |
| 17408 | M. E. Operating & Services, Inc. | Fort Worth, TX 76104 | Oil & Gas Operator | Sep 2026 |
| 17409 | M. F. McCain, Inc. | | Oil & Gas Operator | Jul 1987 |
| 17410 | M. Grace, Inc. | Henderson, TX 75653 | Oil & Gas Operator | Sep 2026 |
| 17411 | M. H. Whittier Energy LLC | | Oil & Gas Operator | Sep 1996 |
| 17412 | M. H.Marr | | Oil & Gas Operator | Mar 1998 |
| 17413 | M. J. G., Inc. | Alice, TX 78333 | Oil & Gas Operator | Jul 2010 |
| 17414 | M. J. McCaffery Oil Co. | Allegany, NY 14706 | Oil Operator | Dec 2017 |
| 17415 | M. J. T. Enterprises | | Oil Operator | May 2026 |
| 17416 | M. K. Fuhrman LLC | | Oil Operator | Mar 2026 |
| 17417 | M. K. Production | Caldwell, TX 77836 | Oil & Gas Operator | Mar 2008 |
| 17418 | M. L. Mayfield | | Oil & Gas Operator | Oct 1990 |
| 17419 | M. L. Mayfield Co. | | Oil & Gas Operator | Aug 1991 |
| 17420 | M. M. & M. Resources, Inc. | Oklahoma City, OK 73120 | Oil & Gas Operator | Apr 2020 |
| 17421 | M. P. O'Meara Oil Co. | | Oil & Gas Operator | Apr 1991 |
| 17422 | M. P. S. Prod. Co. | Houston, TX 77225 | Oil & Gas Operator | Dec 1996 |
| 17423 | M. Parker Production Co. | | Oil Operator | Dec 2024 |
| 17424 | M. S. Delone | | Oil Operator | Nov 1990 |
| 17425 | M. S. Productions, Inc. | Pittsburg, KS 66762 | Oil & Gas Operator | Nov 2019 |
| 17426 | M. T. R. Production | | Oil Operator | Mar 2006 |
| 17427 | M. W. Maxwell | | Oil & Gas Operator | Apr 1990 |
| 17428 | M.A. Yost Operations, Inc | Russell, KS 67665 | Oil Operator | May 2026 |
| 17429 | M.A.E. Resources, Inc. | Parker, KS 66072 | Oil Operator | Sep 2011 |
| 17430 | M.A.R.S. Energy | Midland, TX 79701 | Oil & Gas Operator | Sep 2026 |
| 17431 | M.B. Properties, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Oct 1995 |
| 17432 | M.B.J. Operating | Argyle, TX 76226 | Oil & Gas Operator | Jun 2022 |
| 17433 | M.C.E. Trust Group, A General Partnership | Cherryvale, KS 67335 | Oil & Gas Operator | Sep 2009 |
| 17434 | M.D. Skroopka Operating, LLC | Oakland, CA 94611 | Oil & Gas Operator | Sep 2026 |
| 17435 | M.J.O.G., Inc. | Fort Smith, AR 72903 | Oil Operator | Mar 2015 |
| 17436 | M.K.B. Energy Corp | Brownwood, TX 76801 | Gas Operator | Sep 2026 |
| 17437 | M.O.K.A.T. | Bartlesville, OK 74003 | Oil Operator | Jun 2001 |
| 17438 | M.R.M. Operating, Inc. | Midland, TX 79707 | Oil & Gas Operator | Aug 2003 |
| 17439 | M.T.M. Petroleum | | Oil & Gas Operator | Oct 1995 |
| 17440 | M2 Louisiana Gas Service, LLC | | Oil Operator | Apr 2010 |
| 17441 | M2 Squared Operating, LLC | Rockwall, TX 75032 | Oil Operator | Sep 2026 |
| 17442 | M2S Oil LLC | | Oil Operator | Apr 2026 |
| 17443 | M3 Helium Corp | | Gas Operator | May 2026 |
| 17444 | M3V Energy, LLC | Perryton, TX 79070 | Oil & Gas Operator | Sep 2026 |
| 17445 | M4 Energy, LLC | Watsontown, PA 17777 | Oil & Gas Operator | Dec 2025 |
| 17446 | M5oexit, LLC | Pampa, TX 79066 | Oil & Gas Operator | Sep 2026 |
| 17447 | M7 Resources LLC | Lubbock, TX 79414 | Oil Operator | May 2026 |
| 17448 | Ma-Si, Inc. | | Oil & Gas Operator | May 1998 |
| 17449 | Mac 5 Operating, LLC | Pampa, TX 79065 | Oil & Gas Operator | Feb 2021 |
| 17450 | Mac Engineering & Operating Co | | Oil & Gas Operator | May 2005 |
| 17451 | Mac Oil Field Service Inc | Millersburg, OH 44654 | Oil & Gas Operator | Dec 2025 |
| 17452 | Mac Operating | Graham, TX 76450 | Oil & Gas Operator | Jun 2023 |
| 17453 | Macdonald, Reggie And Janyth | Stafford, NY 14143 | Gas Operator | Dec 2025 |
| 17454 | Mace, T. A. | Oklahoma City, OK 73127 | Oil & Gas Operator | Feb 2008 |
| 17455 | Macfarlan Oil And Gas, LLC | Ellenboro, WV 263460058 | Oil & Gas Operator | Dec 2021 |
| 17456 | Mach Petroleum, Inc. | Tulsa, OK 74153 | Oil & Gas Operator | Nov 2014 |
| 17457 | Macha Enterprises, Inc. | Wichita Falls, TX 76309 | Oil Operator | Sep 2026 |
| 17458 | Machii-Ross Petroleum Co | | Oil & Gas Operator | Apr 2014 |
| 17459 | Machin & Associates, Inc. | Longview, TX 75606 | Oil & Gas Operator | Sep 2026 |
| 17460 | Macina, P.T. | Shamrock, TX 79079 | Gas Operator | Sep 2026 |
| 17461 | Mack Energy Co. | Duncan, OK 73534 | Oil & Gas Operator | Jul 2026 |
| 17462 | Mack Energy Comp | | Oil & Gas Operator | Nov 1994 |
| 17463 | Mack Energy Corporation | Artesia, NM 88211 | Oil & Gas Operator | Jul 2026 |
| 17464 | Mack Oil Company | Duncan, OK 73534 | Oil & Gas Operator | Nov 2000 |
| 17465 | Mack Oil Corp | | Oil & Gas Operator | Nov 1998 |
| 17466 | Mack Oil Corp And Delta Oil Co Inc Great Lakes Nia | | Oil & Gas Operator | Feb 1986 |
| 17467 | Mack Oil Corp And Neyer Oil Inc | | Oil & Gas Operator | May 1988 |
| 17468 | Mackellar Inc | Oklahoma City, OK 73116-7101 | Oil & Gas Operator | Jul 2026 |
| 17469 | Mackenco Inc | Columbus, OH 43235 | Oil & Gas Operator | Dec 2020 |
| 17470 | Mackey Consulting & Leasing LLC | Cleveland, OK 74020 | Oil & Gas Operator | Jun 2026 |
| 17471 | Mackinaw Two, LLC | | Oil & Gas Operator | May 2020 |
| 17472 | Maclane Gas Company L.P. | Corpus Chrsti, TX 78478 | Oil & Gas Operator | Mar 1994 |
| 17473 | Macmart Inc | Wynnewood, OK 73098 | Oil & Gas Operator | Jan 2016 |
| 17474 | Macnichols, Jennifer | Akron, NY 14001 | Gas Operator | Dec 2025 |
| 17475 | Maco Incorporate | | Oil Operator | Jun 1984 |
| 17476 | Macpherson Oil Company LLC | | Oil & Gas Operator | Jun 2026 |
| 17477 | Macpherson Operating Company L.P. | | Oil & Gas Operator | Jun 2026 |
| 17478 | Macro Oil Company | Bartlesville, OK 74006 | Oil Operator | Aug 1999 |
| 17479 | Macum Energy Inc | Billings, MT 59104 | Oil & Gas Operator | Aug 2021 |
| 17480 | Mad Dog Oil Co. | | Oil Operator | Mar 2016 |
| 17481 | Mad Operators LLC | | Oil & Gas Operator | May 2026 |
| 17482 | Madcap Resources, LLC | Edmond, OK 73013 | Gas Operator | Jun 2026 |
| 17483 | Madco Energy Corp | Logan, OH 43138 | Oil & Gas Operator | Dec 1987 |
| 17484 | Maddox Energy Corp | Dallas, TX BAD ADDR | Oil & Gas Operator | Jul 1995 |
| 17485 | Maddox Oil & Gas, Inc. | | Oil Operator | Apr 1983 |
| 17486 | Maddox Operating | Graham, TX 76450 | Oil & Gas Operator | Sep 2026 |
| 17487 | Maddux Oil & Gas | Strawn, TX 76475 | Oil & Gas Operator | Sep 2026 |
| 17488 | Maddux, Elizabeth H. | San Antonio, TX 78217 | Oil & Gas Operator | Nov 1995 |
| 17489 | Madera, R. F. | Palm Desert, CA 92210 | Oil & Gas Operator | Sep 2000 |
| 17490 | Madison And Wright LLC | The Colony, TX 75056 | Oil & Gas Operator | Sep 2026 |
| 17491 | Madison Brothers Investment, LLC | Brownsville, KY 42210 | Oil & Gas Operator | Dec 2023 |
| 17492 | Madison Mark T | Marienville, PA 16239-6029 | Oil & Gas Operator | Dec 2012 |
| 17493 | Madison Oil Co.-Halbouty, M. T. | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 17494 | Madison Oil Company | Wichita Falls, TX 76308 | Oil & Gas Operator | Dec 1998 |
| 17495 | Madtick Dev Corp | | Oil & Gas Operator | Dec 2024 |
| 17496 | Maersk Energy Inc. | Houston, TX 77042 | Oil & Gas Operator | Oct 1994 |
| 17497 | Maertins Production, LLC | Queen City, TX 75572 | Oil Operator | Sep 2026 |
| 17498 | Magaw & Zimmer | Perry, OK 73077-1055 | Oil & Gas Operator | Aug 2013 |
| 17499 | Magellan E&P Holdings, Inc. | Houston, TX 77056 | Oil & Gas Operator | Jun 2021 |
| 17500 | Magellan Exploration Co LTD | Bethany, OK 73008-0909 | Oil & Gas Operator | Jun 2014 |