| 18501 | May Petroleum, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Nov 1998 |
| 18502 | Maya Oil LLC | | Oil Operator | Feb 2025 |
| 18503 | Mayabb Oil Company Inc | Tulsa, OK 74105-5158 | Oil & Gas Operator | Jan 2025 |
| 18504 | Maybrier Brothers | | Oil Operator | Apr 2006 |
| 18505 | Maybrier Production, L.L.C. | | Oil Operator | Oct 2022 |
| 18506 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | May 2025 |
| 18507 | Mayes Donald W & Associates | Piedmont, OK 73078-0051 | Oil & Gas Operator | Dec 1996 |
| 18508 | Mayes Operating Co. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2019 |
| 18509 | Mayfield Energy, LLC | Austin, TX 78732 | Oil & Gas Operator | May 2025 |
| 18510 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | May 2025 |
| 18511 | Mayfield SWD LLC | McKinney, TX 75070-5020 | Oil Operator | Aug 2021 |
| 18512 | Mayhar N D | Eufaula, OK 74432 | Oil Operator | Apr 2015 |
| 18513 | Mayhew Properties | | Gas Operator | Jan 2025 |
| 18514 | Mayjac I, LLC | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 18515 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 18516 | Mayne & Mertz, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2013 |
| 18517 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 18518 | Mayo Ross L Inc | Oklahoma City, OK 73120-1426 | Oil & Gas Operator | Jan 1997 |
| 18519 | Mayo, Danny | Whitesboro, TX 76273 | Oil & Gas Operator | May 2025 |
| 18520 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | May 2025 |
| 18521 | Mayo, Keith | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2009 |
| 18522 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 18523 | Mays Coal Co | Clarion, PA 16214-0447 | Gas Operator | Dec 2003 |
| 18524 | Mays Gas & Coal Co | Clarion, PA 16214-0447 | Oil & Gas Operator | Dec 2024 |
| 18525 | Mays Oil LLC | | Oil Operator | Apr 2021 |
| 18526 | Mays, Sam W., Jr. Estate | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2005 |
| 18527 | Mayshark, James Page | Sherman, NY 14781 | Gas Operator | Dec 2023 |
| 18528 | Mazco Energy LLC | San Antonio, TX 78266 | Oil & Gas Operator | May 2025 |
| 18529 | Mazel Oil & Gas Co. | Austin, TX 78768 | Gas Operator | Jan 1994 |
| 18530 | Mazurkiewicz, Gary, Kimberly, Matt | Perrysburg, NY 14129 | Gas Operator | Dec 2023 |
| 18531 | MB Energy, LLC | San Antonio, TX 78233 | Oil & Gas Operator | May 2025 |
| 18532 | MB Exploration, LLC | Dallas, TX 75380 | Oil & Gas Operator | Jul 2008 |
| 18533 | MB Holdings LLC | Independence, KS 67301 | Oil Operator | Jan 2025 |
| 18534 | MB Operating | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 18535 | MBC Operating Co., Inc. | Garland, TX 75042 | Oil & Gas Operator | Aug 1993 |
| 18536 | Mbi Oil & Gas LLC | Dickinson, ND 58601 | Oil & Gas Operator | Mar 2025 |
| 18537 | MBM Partnership | | Gas Operator | Nov 1991 |
| 18538 | MBM Production, LLC | Pikeville, KY 41501 | Oil & Gas Operator | Dec 2023 |
| 18539 | Mbo, LLC | | Oil Operator | Jan 2025 |
| 18540 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | May 2025 |
| 18541 | MBS Resources Inc | Wilcox, PA 15870-1810 | Oil & Gas Operator | Dec 2024 |
| 18542 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | May 2025 |
| 18543 | MC C Oil Co Inc | Sedan, KS 67361 | Oil Operator | Apr 2016 |
| 18544 | MC Glover, LLC | Albany, TX 76430 | Oil Operator | May 2025 |
| 18545 | MC Oil, LLC | Morganfield, KY 42437 | Oil Operator | Dec 2023 |
| 18546 | MC Panhandle, Inc. | Tulsa, OK 74102 | Gas Operator | Jul 1998 |
| 18547 | MC1 Consulting, Inc. | San Antonio, TX 78209 | Oil Operator | May 2025 |
| 18548 | MC123 LLC | Indiana, PA 15701-8718 | Gas Operator | Dec 2024 |
| 18549 | McA Petroleum Corporation | Flatonia, TX 78941 | Oil & Gas Operator | May 2025 |
| 18550 | McAdams Roux & Associates | Denver, CO 80202 | Oil & Gas Operator | Dec 1999 |
| 18551 | McAdams, J F | | Oil Operator | May 1971 |
| 18552 | McAlester Fuel Co | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 18553 | McAnear Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Dec 2002 |
| 18554 | McAninch J W | Tonkawa, OK 74653 | Oil & Gas Operator | Nov 2000 |
| 18555 | McAninch Michael E | Tonkawa, OK 74653-4415 | Oil & Gas Operator | May 2013 |
| 18556 | McAninch W Kent | Tonkawa, OK 74653-4216 | Oil & Gas Operator | Oct 2016 |
| 18557 | McBay Company | Grapeland, TX 75844 | Oil & Gas Operator | Feb 2002 |
| 18558 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 18559 | McBee Operating Company, L.L.C. | Dallas, TX 75209 | Oil & Gas Operator | May 2025 |
| 18560 | McBee, Jim Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2012 |
| 18561 | McBo Oil Co. | | Oil & Gas Operator | Dec 1996 |
| 18562 | McBrayer Oil Corporation | Rockport, TX 78381 | Oil & Gas Operator | Nov 1994 |
| 18563 | McBride Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 18564 | McBride Production Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 1993 |
| 18565 | McBride, Jane | Perry, NY 14530 | Gas Operator | Dec 2023 |
| 18566 | McBride, Jerrel L Enterprise Inc | Kilgore, TX 75663 | Oil & Gas Operator | Jun 1999 |
| 18567 | McBride, Nicholas J. & Holly M. | Lakeland, FL 33810 | Gas Operator | Dec 2023 |
| 18568 | McCabe & Co | Albion, PA 16401-8013 | Oil & Gas Operator | Dec 1994 |
| 18569 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 18570 | McCabe Oil And Gas LLC / Osage Only | | Oil Operator | Feb 2025 |
| 18571 | McCabe, William G | | Oil & Gas Operator | Aug 2013 |
| 18572 | McCaffery & Krampf Oil Co. | Allegany, NY 14706 | Oil Operator | Dec 2012 |
| 18573 | McCall Carl E | Fairmount City, PA 16224 | Oil & Gas Operator | Dec 2024 |
| 18574 | McCamey Oil And Gas LLC | MC Camey, TX 79752 | Oil Operator | May 2025 |
| 18575 | McCammon Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | May 2025 |
| 18576 | McCandless Rober | | Oil & Gas Operator | May 1991 |
| 18577 | McCandlish R L Oil Co Inc | Bremen, OH 43107 | Oil & Gas Operator | Dec 1997 |
| 18578 | McCann Corporation | Midland, TX 79710 | Oil & Gas Operator | May 2025 |
| 18579 | McCann Drilling | | Oil & Gas Operator | Oct 1996 |
| 18580 | McCann Drilling, Inc. | Bartlesville, OK 74003 | Oil Operator | Mar 2011 |
| 18581 | McCann Mark Wind | | Oil & Gas Operator | Dec 1994 |
| 18582 | McCann Petroleum, Inc. | Sedan, KS 67361 | Oil & Gas Operator | Jul 1998 |
| 18583 | McCann Resources Inc | | Oil & Gas Operator | Feb 2025 |
| 18584 | McCart Sue | Okmulgee, OK 74447-8580 | Oil & Gas Operator | Nov 2024 |
| 18585 | McCarter, A. Nelson | Houston, TX 77063 | Oil & Gas Operator | Aug 2003 |
| 18586 | McCarter, W. B. Jr. | Houston, TX 77063 | Oil & Gas Operator | Feb 2002 |
| 18587 | McCarter-Greenbrier-Macdonald | | Oil Operator | Sep 1981 |
| 18588 | McCarthy Oil & Gas Corporation | Houston, TX 77056 | Oil & Gas Operator | Oct 2007 |
| 18589 | McCarthy Oil Co. | | Oil Operator | Dec 1998 |
| 18590 | McCarthy Oil Com | | Oil Operator | Jun 1994 |
| 18591 | McCarthy Tim W - | | Oil Operator | Mar 1994 |
| 18592 | McCarthy, Lawrence J. | Plains, MT 59859-9215 | Oil & Gas Operator | Nov 2011 |
| 18593 | McCartney Engineering LLC | Wheat Ridge, CO 80033 | Oil & Gas Operator | Mar 2025 |
| 18594 | McCarty Francis | | Oil Operator | Sep 1993 |
| 18595 | McCarty, Charles E | Spencer, WV 25276 | Oil & Gas Operator | Dec 2021 |
| 18596 | McCaskey, Jeffrey A. | East Aurora, NY 14052 | Gas Operator | Dec 2023 |
| 18597 | McCasland Management Inc | Hobbs, NM 88240 | Oil & Gas Operator | Aug 2020 |
| 18598 | McCauley Production | Graham, TX 76450 | Oil Operator | May 2025 |
| 18599 | McCauley, F. R. | Houston, TX 77002 | Oil & Gas Operator | Apr 2000 |
| 18600 | McChesney Michael & Ayo Joseph R | Pinedale, WY 82941-1282 | Oil Operator | Nov 2019 |