| 18001 | Materi Exploration Inc | Upton, WY 82730 | Oil Operator | Nov 2021 |
| 18002 | Matherly Elaine | Bristow, OK 74010-9536 | Oil Operator | Mar 2015 |
| 18003 | Mathews & Casselman Oil Inc | Morris, OK 74445 | Oil & Gas Operator | Dec 2021 |
| 18004 | Mathews Billy J | Morris, OK 74445-4826 | Oil & Gas Operator | Jul 2024 |
| 18005 | Mathews Exploration Corporation | Oklahoma City, OK 73155-5328 | Oil & Gas Operator | Mar 2015 |
| 18006 | Mathews Roger Dba Mathews Oil/Trans Energy | Kellyville, OK 74039 | Oil Operator | Dec 2023 |
| 18007 | Mathis & Sons, Inc. | Rule, TX 79547 | Oil & Gas Operator | Sep 2024 |
| 18008 | Mathis, Bill | Midland, TX 79702 | Oil & Gas Operator | Nov 2001 |
| 18009 | Matlock, Randall K. | Topeka, KS 66607 | Oil Operator | May 2000 |
| 18010 | Matna Enterprises LLC | Maud, OK 74854-2812 | Oil & Gas Operator | Jun 2024 |
| 18011 | Mator LLC | Hennessey, OK 73742-1235 | Oil & Gas Operator | Jul 2024 |
| 18012 | Matoush Wade E | | Oil & Gas Operator | Mar 2014 |
| 18013 | Matrex LLC | | Gas Operator | May 2006 |
| 18014 | Matriks Energy LLC | Ashland, KY 41102 | Gas Operator | Dec 2021 |
| 18015 | Matrix Energy LLC | | Oil & Gas Operator | Apr 2013 |
| 18016 | Matrix Exploration And Development LLC | | Oil & Gas Operator | Oct 2008 |
| 18017 | Matrix New Mexico Operating Company LLC | Sugarland, TX 77479 | Oil & Gas Operator | Aug 2010 |
| 18018 | Matrix Oil & Gas, Inc. | | Oil & Gas Operator | Jul 2001 |
| 18019 | Matrix Oil Corporation | | Oil & Gas Operator | Jul 2024 |
| 18020 | Matrix Petroleum, LLC | Houston, TX 77077 | Oil & Gas Operator | Sep 2024 |
| 18021 | Matrix Producing Company | Luling, TX 78648 | Oil & Gas Operator | Feb 2005 |
| 18022 | Matrix Production Company | Sugar Land, TX 77478 | Oil & Gas Operator | Jul 2024 |
| 18023 | Matt Prod Enterprises | Lancaster, OH 43130 | Oil & Gas Operator | Dec 2017 |
| 18024 | Mattea Oil & Gas LLC | Drumright, OK 74023 | Oil & Gas Operator | Mar 2024 |
| 18025 | Matthews Florine D | Bristow, OK 74010 | Oil & Gas Operator | Jan 2020 |
| 18026 | Matthews Kenneth (Butch) | Konawa, OK 74849-0310 | Oil Operator | Jun 2024 |
| 18027 | Matthews Oil & Gas | Ada, OK 74820 | Oil & Gas Operator | Jul 2024 |
| 18028 | Matthews Oil & Gas LLC | Weleetka, OK 74880-7312 | Oil & Gas Operator | Apr 2020 |
| 18029 | Matthews Operating Co., Inc. | | Gas Operator | Aug 2001 |
| 18030 | Mattingly, Inc. | Wichita, KS 67226 | Gas Operator | Jun 2011 |
| 18031 | Mattox, J. R. | Jacksboro, TX 76458 | Oil Operator | Mar 2018 |
| 18032 | Matuk, Edward C. | Neodesha, KS 66757 | Oil Operator | Aug 1989 |
| 18033 | Matzinger & Bell Inc-Carl O&G | | Oil & Gas Operator | Dec 1981 |
| 18034 | Matzinger & Bell, Inc. | | Oil & Gas Operator | Dec 1982 |
| 18035 | Matzinger Petroleum Co. | | Oil & Gas Operator | Jan 1991 |
| 18036 | Mauldin Robert | Barnsdall, OK 74002 | Oil Operator | Apr 2024 |
| 18037 | Maurine B. Pyle | | Oil & Gas Operator | Mar 1993 |
| 18038 | Mauro J. Dentino | | Oil Operator | Jun 2024 |
| 18039 | Mauslein, Lenore | Wellsville, KS 66092 | Oil Operator | Oct 2001 |
| 18040 | Maverick Brothers Operating,Inc. | Enid, OK 73702 | Oil & Gas Operator | Sep 2024 |
| 18041 | Maverick Brothers Resources LLC | Enid, OK 73701 | Oil & Gas Operator | Jun 2024 |
| 18042 | Maverick Drilling Co., Inc. | Austin, TX 78729 | Oil & Gas Operator | Mar 2015 |
| 18043 | Maverick Energy & Dev. Corp. | Austin, TX 78746 | Oil & Gas Operator | Sep 2024 |
| 18044 | Maverick Energy Group, Inc. | Tulsa, OK 74103 | Oil & Gas Operator | Sep 2024 |
| 18045 | Maverick Expl. & Drilling Co. | Richland, TX 76681 | Oil & Gas Operator | Aug 2003 |
| 18046 | Maverick Exploration And Production Inc | | Oil & Gas Operator | Jun 2024 |
| 18047 | Maverick Mudlogging | Eagle Pass, TX 78852 | Oil Operator | Sep 2024 |
| 18048 | Maverick Oil Co. | Richland, TX 76681 | Oil Operator | Sep 2024 |
| 18049 | Maverick Oil Corp. | | Oil Operator | May 1997 |
| 18050 | Maverick Operating, LLC | Midland, TX 79701 | Oil & Gas Operator | Sep 2024 |
| 18051 | Maverick Permian LLC | Houston, TX 77002 | Oil & Gas Operator | Sep 2024 |
| 18052 | Maverick Prod. Co., Inc. | Houston, TX 77056 | Oil & Gas Operator | Sep 2024 |
| 18053 | Maverick Producers, Inc. | | Oil Operator | May 2012 |
| 18054 | Maverick Production | Nocona, TX 76255 | Oil & Gas Operator | May 2007 |
| 18055 | Maverick Properties, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Sep 1994 |
| 18056 | Max Extract Technologies, LLC | Oklahoma City, OK 73105 | Gas Operator | Mar 2024 |
| 18057 | Max Oil Company | Blackwell, OK 74631-6329 | Oil & Gas Operator | Apr 2024 |
| 18058 | Max Oil LLC | Andover, KS 67002 | Oil Operator | Dec 2019 |
| 18059 | Max Papay LLC | Meade, KS 67864 | Oil & Gas Operator | Jun 2018 |
| 18060 | Maxam Incorporat | | Oil Operator | Jun 1991 |
| 18061 | Maxcrude, LLC | Winfield, KS 67156 | Oil & Gas Operator | May 2024 |
| 18062 | Maxey & Swan Oil Co. | Decatur, TX 76234 | Oil & Gas Operator | Apr 2007 |
| 18063 | Maxey Homer G | | Oil & Gas Operator | Nov 1997 |
| 18064 | Maxim Drilling & Expl Inc | Gillette, WY 82717 | Oil & Gas Operator | Jul 2024 |
| 18065 | Maxim Energy Corporation | Baytown, TX 77520 | Oil & Gas Operator | Jun 2024 |
| 18066 | Maxim Energy Inc Dba Maxim Tep Inc | | Oil Operator | Dec 2009 |
| 18067 | Maxim Resources LTD U.S.A. | | Oil & Gas Operator | Dec 1997 |
| 18068 | Maxima Energy Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2012 |
| 18069 | Maximum Energy Development, LLC | Glasgow, KY 42142 | Oil Operator | Dec 2022 |
| 18070 | Maximum Lease Service, Inc | Eunice, NM 88231 | Oil & Gas Operator | Jul 2024 |
| 18071 | Maximum Oil & Gas, Inc | | Gas Operator | Dec 2022 |
| 18072 | Maximus Operating, LTD. | Kilgore, TX 75663 | Oil & Gas Operator | Sep 2024 |
| 18073 | Maxine Oil Company | Muskogee, OK 74401-0512 | Oil & Gas Operator | Sep 2014 |
| 18074 | Maxland Oil Company | Haslet, TX 76052-5137 | Oil Operator | Nov 2014 |
| 18075 | Maxoil Inc. | | Oil & Gas Operator | Dec 2004 |
| 18076 | Maxson Gas Corp | Shinglehouse, PA 16748-0436 | Oil & Gas Operator | Dec 2019 |
| 18077 | Maxson Lawrence C | Shinglehouse, PA 16748 | Oil & Gas Operator | Dec 2016 |
| 18078 | Maxum Energy Corp | Plano, TX 75025 | Oil & Gas Operator | Jan 2003 |
| 18079 | Maxus Exploratio | | Oil Operator | Jun 1991 |
| 18080 | Maxus Exploration Company | Dallas, TX 75201 | Oil & Gas Operator | Jan 1995 |
| 18081 | Maxwell Bros | Clarion, PA 16214-7446 | Oil & Gas Operator | Dec 2023 |
| 18082 | Maxwell Oil & Gas Corp. | Kilgore, TX 75663 | Oil & Gas Operator | Jan 2001 |
| 18083 | Maxwell Operating Co., Inc. | Englewood, CO 80155 | Oil Operator | Jan 2007 |
| 18084 | Maxwell Resources Corporation | Oklahoma City, OK 73116-7746 | Oil & Gas Operator | Apr 2009 |
| 18085 | Maxwell, J. K. | Kilgore, TX 75662 | Oil & Gas Operator | Aug 1995 |
| 18086 | Maxwell, Richard | Wichita Falls, TX 76301 | Oil & Gas Operator | May 1995 |
| 18087 | Maxwell, Riley G., Co. | Abilene, TX 79604 | Oil & Gas Operator | Jan 2000 |
| 18088 | May Energy Company | Stroud, OK 74079 | Oil & Gas Operator | May 2013 |
| 18089 | May Gas, Inc. | | Oil & Gas Operator | Dec 2008 |
| 18090 | May Investments, Inc. | New Boston, TX 75570 | Oil & Gas Operator | Aug 2003 |
| 18091 | May Oil & Gas, L.L.C. | | Oil & Gas Operator | Dec 2013 |
| 18092 | May Petroleum, Inc. | Dallas, TX 75231 | Oil & Gas Operator | Nov 1998 |
| 18093 | Maya Oil LLC | | Oil Operator | Jul 2024 |
| 18094 | Mayabb Oil Company Inc | Tulsa, OK 74105-5158 | Oil & Gas Operator | Apr 2024 |
| 18095 | Maybrier Brothers | | Oil Operator | Apr 2006 |
| 18096 | Maybrier Production, L.L.C. | | Oil Operator | Oct 2022 |
| 18097 | Mayco Oil | Nocona, TX 76255 | Oil & Gas Operator | Sep 2024 |
| 18098 | Mayes Donald W & Associates | Piedmont, OK 73078-0051 | Oil & Gas Operator | Dec 1996 |
| 18099 | Mayes Operating Co. | Stephenville, TX 76401 | Oil & Gas Operator | Oct 2019 |
| 18100 | Mayfield Energy, LLC | Austin, TX 78732 | Oil & Gas Operator | Sep 2024 |