| 18501 | Maxima Energy Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2012 |
| 18502 | Maximum Energy Development, LLC | Glasgow, KY 42142 | Oil Operator | Dec 2022 |
| 18503 | Maximum Lease Service, Inc | Eunice, NM 88231 | Oil & Gas Operator | Sep 2025 |
| 18504 | Maximum Oil & Gas, Inc | | Gas Operator | Dec 2023 |
| 18505 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 18506 | Maxine Oil Company | Muskogee, OK 74401-0512 | Oil & Gas Operator | Sep 2014 |
| 18507 | Maxland Oil Company | Haslet, TX 76052-5137 | Oil Operator | Nov 2014 |
| 18508 | Maxoil Inc. | | Oil & Gas Operator | Dec 2004 |
| 18509 | Maxson Gas Corp | Shinglehouse, PA 16748-0436 | Oil & Gas Operator | Dec 2024 |
| 18510 | Maxson Lawrence C | Shinglehouse, PA 16748 | Oil & Gas Operator | Dec 2016 |
| 18511 | Maxum Energy Corp | Plano, TX 75025 | Oil & Gas Operator | Jan 2003 |
| 18512 | Maxus Exploratio | | Oil Operator | Jun 1991 |
| 18513 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 18514 | Maxwell Bros | Clarion, PA 16214-7446 | Oil & Gas Operator | Dec 2024 |
| 18515 | Maxwell Oil & Gas Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2001 |
| 18516 | Maxwell Operating Co., Inc. | Englewood, CO 80155 | Oil Operator | Jan 2007 |
| 18517 | Maxwell Resources Corporation | Oklahoma City, OK 73159 | Oil & Gas Operator | Apr 2009 |
| 18518 | Maxwell, J. K. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 1995 |
| 18519 | Maxwell, Richard | Wichita Falls, TX 76301 | Oil & Gas Operator | May 1995 |
| 18520 | Maxwell, Riley G., Co. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 18521 | May Energy Company | Stroud, OK 74079 | Oil & Gas Operator | May 2013 |
| 18522 | May Gas, Inc. | | Oil & Gas Operator | Dec 2008 |
| 18523 | May Investments, Inc. | New Boston, TX 75570 | Oil & Gas Operator | Aug 2003 |
| 18524 | May Oil & Gas, L.L.C. | | Oil & Gas Operator | Dec 2013 |
| 18525 | May Petroleum Inc | Dallas, TX 75231 | Oil & Gas Operator | Nov 1998 |
| 18526 | Maya Oil LLC | | Oil Operator | Oct 2025 |
| 18527 | Mayabb Oil Company Inc | Tulsa, OK 74105-5158 | Oil & Gas Operator | Jul 2025 |
| 18528 | Maybrier Brothers | | Oil Operator | Apr 2006 |
| 18529 | Maybrier Production, L.L.C. | | Oil Operator | Oct 2022 |
| 18530 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | Dec 2025 |
| 18531 | Mayes Donald W & Associates | Piedmont, OK 73078-0051 | Oil & Gas Operator | Dec 1996 |
| 18532 | Mayes Operating Co. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2019 |
| 18533 | Mayfield Energy, LLC | Austin, TX 78732 | Oil & Gas Operator | Dec 2025 |
| 18534 | Mayfield Engineering Service | Tulsa, OK 74104 | Oil & Gas Operator | Dec 2025 |
| 18535 | Mayfield SWD LLC | McKinney, TX 75070-5020 | Oil Operator | Aug 2021 |
| 18536 | Mayhar N D | Eufaula, OK 74432 | Oil Operator | Apr 2015 |
| 18537 | Mayhew Properties | | Gas Operator | Jun 2025 |
| 18538 | Mayjac I, LLC | Midland, TX 79705 | Oil & Gas Operator | Dec 2025 |
| 18539 | Maynard Oil Co. | Denver, CO 80202 | Oil & Gas Operator | Sep 2004 |
| 18540 | Mayne & Mertz, Inc. | Midland, TX 79702 | Oil & Gas Operator | Mar 2013 |
| 18541 | Mayo Oil Co. | San Antonio, TX 78209 | Oil & Gas Operator | Feb 2019 |
| 18542 | Mayo Ross L Inc | Oklahoma City, OK 73120-1426 | Oil & Gas Operator | Jan 1997 |
| 18543 | Mayo, Danny | Whitesboro, TX 76273 | Oil & Gas Operator | Dec 2025 |
| 18544 | Mayo, Eddie | Fredericksbrg, TX 78624 | Oil & Gas Operator | Dec 2025 |
| 18545 | Mayo, Keith | Wichita Falls, TX 76301 | Oil & Gas Operator | Sep 2009 |
| 18546 | Mayo, Paul R. | Quinlan, TX 75474 | Oil & Gas Operator | May 1999 |
| 18547 | Mays Coal Co | Clarion, PA 16214-0447 | Gas Operator | Dec 2003 |
| 18548 | Mays Enterprises, Inc. | Mineral Wells, TX 76067 | Gas Operator | Oct 2010 |
| 18549 | Mays Gas & Coal Co | Clarion, PA 16214-0447 | Oil & Gas Operator | Dec 2024 |
| 18550 | Mays Oil LLC | | Oil Operator | Apr 2021 |
| 18551 | Mays, Sam W., Jr. Estate | Tulsa, OK 74103 | Oil & Gas Operator | Jun 2005 |
| 18552 | Mayshark, James Page | Sherman, NY 14781 | Gas Operator | Dec 2024 |
| 18553 | Mazco Energy LLC | San Antonio, TX 78266 | Oil & Gas Operator | Dec 2025 |
| 18554 | Mazel Oil & Gas Co. | Austin, TX 78768 | Gas Operator | Jan 1994 |
| 18555 | Mazurkiewicz, Gary, Kimberly, Matt | Perrysburg, NY 14129 | Gas Operator | Dec 2024 |
| 18556 | MB Energy, LLC | San Antonio, TX 78233 | Oil & Gas Operator | Dec 2025 |
| 18557 | MB Exploration, LLC | Dallas, TX 75380 | Oil & Gas Operator | Jul 2008 |
| 18558 | MB Holdings LLC | Independence, KS 67301 | Oil Operator | Jun 2025 |
| 18559 | MB Operating | Wichita Falls, TX 76309 | Oil & Gas Operator | Mar 2008 |
| 18560 | MBC Operating Co., Inc. | Garland, TX 75042 | Oil & Gas Operator | Aug 1993 |
| 18561 | Mbi Oil & Gas LLC | Dickinson, ND 58601 | Oil & Gas Operator | Oct 2025 |
| 18562 | MBM Partnership | | Gas Operator | Nov 1991 |
| 18563 | MBM Production, LLC | Pikeville, KY 41501 | Oil & Gas Operator | Dec 2023 |
| 18564 | Mbo, LLC | | Oil Operator | Jan 2025 |
| 18565 | MBR Resources, Inc. | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2025 |
| 18566 | MBS Resources Inc | Wilcox, PA 15870-1810 | Oil & Gas Operator | Dec 2024 |
| 18567 | MBX Operating LLC | Houston, TX 77007 | Oil & Gas Operator | Dec 2025 |
| 18568 | MC C Oil Co Inc | Sedan, KS 67361 | Oil Operator | Apr 2016 |
| 18569 | MC Glover, LLC | Albany, TX 76430 | Oil Operator | Dec 2025 |
| 18570 | MC Oil, LLC | Morganfield, KY 42437 | Oil Operator | Dec 2023 |
| 18571 | MC Panhandle, Inc. | Tulsa, OK 74102 | Gas Operator | Jul 1998 |
| 18572 | MC1 Consulting, Inc. | San Antonio, TX 78209 | Oil Operator | Sep 2025 |
| 18573 | MC123 LLC | Indiana, PA 15701-8718 | Gas Operator | Dec 2024 |
| 18574 | McA Petroleum Corporation | Flatonia, TX 78941 | Oil & Gas Operator | Dec 2025 |
| 18575 | McAdams Roux & Associates | Denver, CO 80202 | Oil & Gas Operator | Dec 1999 |
| 18576 | McAdams, J F | | Oil Operator | May 1971 |
| 18577 | McAlester Fuel Co. | Houston, TX 77042 | Oil & Gas Operator | Jan 2010 |
| 18578 | McAnear Oil & Gas | Freer, TX 78357 | Oil & Gas Operator | Dec 2002 |
| 18579 | McAninch J W | Tonkawa, OK 74653 | Oil & Gas Operator | Nov 2000 |
| 18580 | McAninch Michael E | Tonkawa, OK 74653-4415 | Oil & Gas Operator | May 2013 |
| 18581 | McAninch W Kent | Tonkawa, OK 74653-4216 | Oil & Gas Operator | Oct 2016 |
| 18582 | McBay Company | Grapeland, TX 75844 | Oil & Gas Operator | Feb 2002 |
| 18583 | McBee Company, The | Dallas, TX 75219 | Oil & Gas Operator | Dec 1997 |
| 18584 | McBee Operating Company, L.L.C. | Dallas, TX 75209 | Oil & Gas Operator | Dec 2025 |
| 18585 | McBee, Jim Co. | Santa Anna, TX 76878 | Oil & Gas Operator | Mar 2012 |
| 18586 | McBo Oil Co. | | Oil & Gas Operator | Dec 1996 |
| 18587 | McBrayer Oil Corporation | Rockport, TX 78381 | Oil & Gas Operator | Nov 1994 |
| 18588 | McBride Operating LLC | Kilgore, TX 75663 | Oil & Gas Operator | Dec 2025 |
| 18589 | McBride Production Co. | Wichita Falls, TX 76307 | Oil & Gas Operator | May 1993 |
| 18590 | McBride, Jane | Perry, NY 14530 | Gas Operator | Dec 2024 |
| 18591 | McBride, Jerrel L Enterprise Inc | Kilgore, TX 75663 | Oil & Gas Operator | Jun 1999 |
| 18592 | McBride, Nicholas J. & Holly M. | Lakeland, FL 33810 | Gas Operator | Dec 2024 |
| 18593 | McCabe & Co | Albion, PA 16401-8013 | Oil & Gas Operator | Dec 1994 |
| 18594 | McCabe Energy, Inc. | Midland, TX 79702 | Oil & Gas Operator | Aug 2009 |
| 18595 | McCabe Oil And Gas LLC / Osage Only | | Oil Operator | Aug 2025 |
| 18596 | McCabe, William G | | Oil & Gas Operator | Aug 2013 |
| 18597 | McCaffery & Krampf Oil Co. | Allegany, NY 14706 | Oil Operator | Dec 2012 |
| 18598 | McCall Carl E | Fairmount City, PA 16224 | Oil & Gas Operator | Dec 2024 |
| 18599 | McCamey Oil And Gas LLC | MC Camey, TX 79752 | Oil Operator | Dec 2025 |
| 18600 | McCammon Oil & Gas, Inc. | San Angelo, TX 76902 | Oil & Gas Operator | Dec 2025 |