| 18401 | Mat Oil & Gas Exploration Inc | Indiana, PA 15701-8931 | Gas Operator | Dec 1993 |
| 18402 | Matador Drilling Corp. | Midland, TX 79708 | Oil & Gas Operator | Mar 1995 |
| 18403 | Matador E & P Company Inc | | Oil & Gas Operator | May 2020 |
| 18404 | Matador Exploration, Inc. | Sedan, KS 67361 | Oil Operator | Apr 2001 |
| 18405 | Matador Operating Company | Dallas, TX 75240 | Oil & Gas Operator | Jul 2003 |
| 18406 | Matador Operating, LLC | Lubbock, TX 79413 | Oil Operator | Oct 2024 |
| 18407 | Matador Production Company | Dallas, TX 75240 | Oil & Gas Operator | May 2025 |
| 18408 | Matador, Inc. | Sedan, KS 67361 | Oil Operator | Sep 2024 |
| 18409 | Matco Oil Co. | Saratoga, TX 77585 | Oil & Gas Operator | Apr 1999 |
| 18410 | Materi Exploration Inc | Upton, WY 82730 | Oil Operator | Nov 2021 |
| 18411 | Matherly Elaine | Bristow, OK 74010-9536 | Oil Operator | Mar 2015 |
| 18412 | Mathews & Casselman Oil Inc | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 18413 | Mathews Billy J | Morris, OK 74445-4826 | Oil & Gas Operator | Mar 2025 |
| 18414 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 18415 | Mathews Roger Dba Mathews Oil/Trans Energy | Kellyville, OK 74039 | Oil Operator | Feb 2025 |
| 18416 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | May 2025 |
| 18417 | Mathis, Bill | Midland, TX 79702 | Oil & Gas Operator | Nov 2001 |
| 18418 | Matlock, Randall K. | Topeka, KS 66607 | Oil Operator | May 2000 |
| 18419 | Matna Enterprises LLC | Maud, OK 74854-2812 | Oil & Gas Operator | Feb 2025 |
| 18420 | Mator LLC | Hennessey, OK 73742-1235 | Oil & Gas Operator | Mar 2025 |
| 18421 | Matoush Wade E | | Oil & Gas Operator | Mar 2014 |
| 18422 | Matrex LLC | | Gas Operator | May 2006 |
| 18423 | Matriks Energy LLC | Ashland, KY 41102 | Gas Operator | Dec 2021 |
| 18424 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 18425 | Matrix Exploration And Development LLC | | Oil & Gas Operator | Oct 2008 |
| 18426 | Matrix New Mexico Operating Company LLC | Sugarland, TX 77479 | Oil & Gas Operator | Aug 2010 |
| 18427 | Matrix Oil & Gas, Inc. | | Oil & Gas Operator | Jul 2001 |
| 18428 | Matrix Oil Corporation | | Oil & Gas Operator | Mar 2025 |
| 18429 | Matrix Petroleum, LLC | Houston, TX 77077 | Oil & Gas Operator | May 2025 |
| 18430 | Matrix Producing Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2005 |
| 18431 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | Mar 2025 |
| 18432 | Matt Prod Enterprises | Lancaster, OH 43130 | Oil & Gas Operator | Dec 2017 |
| 18433 | Mattco Petroleum | | Oil & Gas Operator | Dec 1988 |
| 18434 | Mattea Oil & Gas LLC | Drumright, OK 74023 | Oil & Gas Operator | Nov 2024 |
| 18435 | Matthews Florine D | Bristow, OK 74010 | Oil & Gas Operator | Jan 2020 |
| 18436 | Matthews Kenneth (Butch) | Konawa, OK 74849-0310 | Oil Operator | Jan 2025 |
| 18437 | Matthews Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | Mar 2025 |
| 18438 | Matthews Oil & Gas LLC | Weleetka, OK 74880-7312 | Oil & Gas Operator | Apr 2020 |
| 18439 | Matthews Operating Co., Inc. | | Gas Operator | Aug 2001 |
| 18440 | Matthews-Bunn Operating Co. | | Oil & Gas Operator | Apr 1981 |
| 18441 | Mattingly, Inc. | Wichita, KS 67226 | Gas Operator | Jun 2011 |
| 18442 | Mattox, J. R. | Jacksboro, TX 76458 | Oil Operator | Mar 2018 |
| 18443 | Matuk, Edward C. | Neodesha, KS 66757 | Oil Operator | Aug 1989 |
| 18444 | Matzinger & Bell Inc-Carl O&G | | Oil & Gas Operator | Dec 1981 |
| 18445 | Matzinger & Bell, Inc. | | Oil & Gas Operator | Dec 1982 |
| 18446 | Matzinger Petroleum Co. | | Oil & Gas Operator | Jan 1991 |
| 18447 | Maurine B. Pyle | | Oil & Gas Operator | Mar 1993 |
| 18448 | Mauro J. Dentino | | Oil Operator | Feb 2025 |
| 18449 | Mauslein, Lenore | Wellsville, KS 66092 | Oil Operator | Oct 2001 |
| 18450 | Maverick Brothers Operating,Inc. | Enid, OK 73702 | Oil & Gas Operator | May 2025 |
| 18451 | Maverick Brothers Resources LLC | Enid, OK 73701 | Oil & Gas Operator | Feb 2025 |
| 18452 | Maverick Drilling Co., Inc. | Austin, TX 78729 | Oil & Gas Operator | Mar 2015 |
| 18453 | Maverick Energy & Dev. Corp. | Austin, TX 78746 | Oil & Gas Operator | May 2025 |
| 18454 | Maverick Energy Group, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | May 2025 |
| 18455 | Maverick Expl. & Drilling Co. | Richland, TX 76681 | Oil & Gas Operator | Aug 2003 |
| 18456 | Maverick Exploration And Production Inc | | Oil & Gas Operator | Mar 2025 |
| 18457 | Maverick Mudlogging | Eagle Pass, TX 78852 | Oil Operator | May 2025 |
| 18458 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | May 2025 |
| 18459 | Maverick Oil Corp. | | Oil Operator | May 1997 |
| 18460 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | May 2025 |
| 18461 | Maverick Permian LLC | Houston, TX 77002 | Oil & Gas Operator | May 2025 |
| 18462 | Maverick Prod. Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | May 2025 |
| 18463 | Maverick Producers, Inc. | | Oil Operator | May 2012 |
| 18464 | Maverick Production | Nocona, TX 76255 | Oil & Gas Operator | May 2007 |
| 18465 | Maverick Properties, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 1994 |
| 18466 | Max Oil Company | Blackwell, OK 74631 | Oil & Gas Operator | Apr 2024 |
| 18467 | Max Oil LLC | Andover, KS 67002 | Oil Operator | Dec 2019 |
| 18468 | Max Papay LLC | Meade, KS 67864 | Oil & Gas Operator | Jun 2018 |
| 18469 | Maxam Incorporat | | Oil Operator | Jun 1991 |
| 18470 | Maxcrude, LLC | Winfield, KS 67156 | Oil & Gas Operator | Jan 2025 |
| 18471 | Maxey & Swan Oil Co. | Decatur, TX 76234 | Oil & Gas Operator | Apr 2007 |
| 18472 | Maxie D, Inc. | Laguna Niguel, CA 92677 | Gas Operator | Feb 1998 |
| 18473 | Maxim Drilling & Expl Inc | Gillette, WY 82717 | Oil & Gas Operator | Mar 2025 |
| 18474 | Maxim Energy Corporation | Baytown, TX 77520 | Oil & Gas Operator | Feb 2025 |
| 18475 | Maxim Energy Inc Dba Maxim Tep Inc | | Oil Operator | Dec 2009 |
| 18476 | Maxim Resources LTD U.S.A. | | Oil & Gas Operator | Dec 1997 |
| 18477 | Maxima Energy Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2012 |
| 18478 | Maximum Energy Development, LLC | Glasgow, KY 42142 | Oil Operator | Dec 2022 |
| 18479 | Maximum Lease Service, Inc | Eunice, NM 88231 | Oil & Gas Operator | Mar 2025 |
| 18480 | Maximum Oil & Gas, Inc | | Gas Operator | Dec 2023 |
| 18481 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | May 2025 |
| 18482 | Maxine Oil Company | Muskogee, OK 74401-0512 | Oil & Gas Operator | Sep 2014 |
| 18483 | Maxland Oil Company | Haslet, TX 76052-5137 | Oil Operator | Nov 2014 |
| 18484 | Maxoil Inc. | | Oil & Gas Operator | Dec 2004 |
| 18485 | Maxson Gas Corp | Shinglehouse, PA 16748-0436 | Oil & Gas Operator | Dec 2024 |
| 18486 | Maxson Lawrence C | Shinglehouse, PA 16748 | Oil & Gas Operator | Dec 2016 |
| 18487 | Maxum Energy Corp | Plano, TX 75025 | Oil & Gas Operator | Jan 2003 |
| 18488 | Maxus Exploratio | | Oil Operator | Jun 1991 |
| 18489 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 18490 | Maxwell Bros | Clarion, PA 16214-7446 | Oil & Gas Operator | Dec 2024 |
| 18491 | Maxwell Oil & Gas Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2001 |
| 18492 | Maxwell Operating Co., Inc. | Englewood, CO 80155 | Oil Operator | Jan 2007 |
| 18493 | Maxwell Resources Corporation | Oklahoma City, OK 73116-7746 | Oil & Gas Operator | Apr 2009 |
| 18494 | Maxwell, J. K. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 1995 |
| 18495 | Maxwell, Richard | Wichita Falls, TX 76301 | Oil & Gas Operator | May 1995 |
| 18496 | Maxwell, Riley G., Co. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 18497 | May Energy Company | Stroud, OK 74079 | Oil & Gas Operator | May 2013 |
| 18498 | May Gas, Inc. | | Oil & Gas Operator | Dec 2008 |
| 18499 | May Investments, Inc. | New Boston, TX 75570 | Oil & Gas Operator | Aug 2003 |
| 18500 | May Oil & Gas, L.L.C. | | Oil & Gas Operator | Dec 2013 |