| 18401 | May Oil & Gas, L.L.C. | | Oil & Gas Operator | Dec 2013 |
| 18402 | May Petroleum, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Nov 1998 |
| 18403 | Maya Oil LLC | | Oil Operator | Aug 2025 |
| 18404 | Mayabb Oil Company Inc | Tulsa, OK 74105-5158 | Oil & Gas Operator | Jun 2025 |
| 18405 | Maybrier Brothers | | Oil Operator | Apr 2006 |
| 18406 | Maybrier Production, L.L.C. | | Oil Operator | Oct 2022 |
| 18407 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | Oct 2025 |
| 18408 | Mayes Donald W & Associates | Piedmont, OK 73078-0051 | Oil & Gas Operator | Dec 1996 |
| 18409 | Mayes Operating Co. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2019 |
| 18410 | Mayfield Energy, LLC | Austin, TX 78732 | Oil & Gas Operator | Oct 2025 |
| 18411 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Oct 2025 |
| 18412 | Mayfield SWD LLC | McKinney, TX 75070-5020 | Oil Operator | Aug 2021 |
| 18413 | Mayhar N D | Eufaula, OK 74432 | Oil Operator | Apr 2015 |
| 18414 | Mayhew Properties | | Gas Operator | Jun 2025 |
| 18415 | Mayjac I, LLC | Midland, TX 79705 | Oil & Gas Operator | Oct 2025 |
| 18416 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 18417 | Mayne & Mertz, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2013 |
| 18418 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 18419 | Mayo Ross L Inc | Oklahoma City, OK 73120-1426 | Oil & Gas Operator | Jan 1997 |
| 18420 | Mayo, Danny | Whitesboro, TX 76273 | Oil & Gas Operator | Oct 2025 |
| 18421 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Oct 2025 |
| 18422 | Mayo, Keith | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2009 |
| 18423 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 18424 | Mays Coal Co | Clarion, PA 16214-0447 | Gas Operator | Dec 2003 |
| 18425 | Mays Gas & Coal Co | Clarion, PA 16214-0447 | Oil & Gas Operator | Dec 2024 |
| 18426 | Mays Oil LLC | | Oil Operator | Apr 2021 |
| 18427 | Mays, Sam W., Jr. Estate | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2005 |
| 18428 | Mayshark, James Page | Sherman, NY 14781 | Gas Operator | Dec 2024 |
| 18429 | Mazco Energy LLC | San Antonio, TX 78266 | Oil & Gas Operator | Oct 2025 |
| 18430 | Mazurkiewicz, Gary, Kimberly, Matt | Perrysburg, NY 14129 | Gas Operator | Dec 2024 |
| 18431 | MB Energy, LLC | San Antonio, TX 78233 | Oil & Gas Operator | Oct 2025 |
| 18432 | MB Exploration, LLC | Dallas, TX 75380 | Oil & Gas Operator | Jul 2008 |
| 18433 | MB Holdings LLC | Independence, KS 67301 | Oil Operator | Jun 2025 |
| 18434 | MB Operating | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 18435 | MBC Operating Co., Inc. | Garland, TX 75042 | Oil & Gas Operator | Aug 1993 |
| 18436 | Mbi Oil & Gas LLC | Dickinson, ND 58601 | Oil & Gas Operator | Aug 2025 |
| 18437 | MBM Partnership | | Gas Operator | Nov 1991 |
| 18438 | MBM Production, LLC | Pikeville, KY 41501 | Oil & Gas Operator | Dec 2023 |
| 18439 | Mbo, LLC | | Oil Operator | Jan 2025 |
| 18440 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Oct 2025 |
| 18441 | MBS Resources Inc | Wilcox, PA 15870-1810 | Oil & Gas Operator | Dec 2024 |
| 18442 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | Oct 2025 |
| 18443 | MC C Oil Co Inc | Sedan, KS 67361 | Oil Operator | Apr 2016 |
| 18444 | MC Glover, LLC | Albany, TX 76430 | Oil Operator | Oct 2025 |
| 18445 | MC Oil, LLC | Morganfield, KY 42437 | Oil Operator | Dec 2023 |
| 18446 | MC Panhandle, Inc. | Tulsa, OK 74102 | Gas Operator | Jul 1998 |
| 18447 | MC1 Consulting, Inc. | San Antonio, TX 78209 | Oil Operator | Oct 2025 |
| 18448 | MC123 LLC | Indiana, PA 15701-8718 | Gas Operator | Dec 2024 |
| 18449 | McA Petroleum Corporation | Flatonia, TX 78941 | Oil & Gas Operator | Oct 2025 |
| 18450 | McAdams Roux & Associates | Denver, CO 80202 | Oil & Gas Operator | Dec 1999 |
| 18451 | McAdams, J F | | Oil Operator | May 1971 |
| 18452 | McAlester Fuel Co | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 18453 | McAnear Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Dec 2002 |
| 18454 | McAninch J W | Tonkawa, OK 74653 | Oil & Gas Operator | Nov 2000 |
| 18455 | McAninch Michael E | Tonkawa, OK 74653-4415 | Oil & Gas Operator | May 2013 |
| 18456 | McAninch W Kent | Tonkawa, OK 74653-4216 | Oil & Gas Operator | Oct 2016 |
| 18457 | McBay Company | Grapeland, TX 75844 | Oil & Gas Operator | Feb 2002 |
| 18458 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 18459 | McBee Operating Company, L.L.C. | Dallas, TX 75209 | Oil & Gas Operator | Oct 2025 |
| 18460 | McBee, Jim Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2012 |
| 18461 | McBo Oil Co. | | Oil & Gas Operator | Dec 1996 |
| 18462 | McBrayer Oil Corporation | Rockport, TX 78381 | Oil & Gas Operator | Nov 1994 |
| 18463 | McBride Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Oct 2025 |
| 18464 | McBride Production Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 1993 |
| 18465 | McBride, Jane | Perry, NY 14530 | Gas Operator | Dec 2024 |
| 18466 | McBride, Jerrel L Enterprise Inc | Kilgore, TX 75663 | Oil & Gas Operator | Jun 1999 |
| 18467 | McBride, Nicholas J. & Holly M. | Lakeland, FL 33810 | Gas Operator | Dec 2024 |
| 18468 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 18469 | McCabe Oil And Gas LLC / Osage Only | | Oil Operator | Jun 2025 |
| 18470 | McCabe, William G | | Oil & Gas Operator | Aug 2013 |
| 18471 | McCaffery & Krampf Oil Co. | Allegany, NY 14706 | Oil Operator | Dec 2012 |
| 18472 | McCall Carl E | Fairmount City, PA 16224 | Oil & Gas Operator | Dec 2024 |
| 18473 | McCamey Oil And Gas LLC | MC Camey, TX 79752 | Oil Operator | Oct 2025 |
| 18474 | McCammon Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Oct 2025 |
| 18475 | McCandless Rober | | Oil & Gas Operator | May 1991 |
| 18476 | McCandlish R L Oil Co Inc | Bremen, OH 43107 | Oil & Gas Operator | Dec 1997 |
| 18477 | McCann Corporation | Midland, TX 79710 | Oil & Gas Operator | Oct 2025 |
| 18478 | McCann Drilling | | Oil & Gas Operator | Oct 1996 |
| 18479 | McCann Drilling, Inc. | Bartlesville, OK 74003 | Oil Operator | Mar 2011 |
| 18480 | McCann Mark Wind | | Oil & Gas Operator | Dec 1994 |
| 18481 | McCann Petroleum, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Jul 1998 |
| 18482 | McCann Resources Inc | | Oil & Gas Operator | Jun 2025 |
| 18483 | McCart Sue | Okmulgee, OK 74447 | Oil & Gas Operator | Nov 2024 |
| 18484 | McCarter, A. Nelson | Houston, TX 77063 | Oil & Gas Operator | Aug 2003 |
| 18485 | McCarter, W. B. Jr. | Houston, TX 77063 | Oil & Gas Operator | Feb 2002 |
| 18486 | McCarter-Greenbrier-Macdonald | | Oil Operator | Sep 1981 |
| 18487 | McCarthy Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Oct 2007 |
| 18488 | McCarthy Oil Co. | | Oil Operator | Dec 1998 |
| 18489 | McCarthy Oil Com | | Oil Operator | Jun 1994 |
| 18490 | McCarthy Tim W - | | Oil Operator | Mar 1994 |
| 18491 | McCarthy, Lawrence J. | Plains, MT 59859-9215 | Oil & Gas Operator | Nov 2011 |
| 18492 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Aug 2025 |
| 18493 | McCarty Francis | | Oil Operator | Sep 1993 |
| 18494 | McCarty, Charles E | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 18495 | McCaskey, Jeffrey A. | East Aurora, NY 14052 | Gas Operator | Dec 2024 |
| 18496 | McCasland Management Inc | Hobbs, NM 88240 | Oil & Gas Operator | Aug 2020 |
| 18497 | McCauley Production | Graham, TX 76450 | Oil Operator | Oct 2025 |
| 18498 | McCauley, F. R. | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 18499 | McChesney Michael & Ayo Joseph R | Pinedale, WY 82941-1282 | Oil Operator | Nov 2019 |
| 18500 | McClain Oil Co | Granville, OH 43023 | Oil & Gas Operator | Dec 1988 |