| 20101 | Morning Gun Exploration LLC | | Oil Operator | Oct 2021 |
| 20102 | Morning Star Oil Company | Thermopolis, WY 82443 | Oil Operator | Feb 2025 |
| 20103 | Morningstar Gas, Inc. | Las Vegas, NV 89117 | Gas Operator | Apr 2025 |
| 20104 | Morningstar Operating LLC | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2025 |
| 20105 | Morningstar Partners, L.P. | Fort Worth, TX 76102 | Oil & Gas Operator | Apr 2022 |
| 20106 | Moro Bay Oil Company, Inc. | | Oil Operator | Jan 1997 |
| 20107 | Morreale, Michael G. & John W. | Frewsburg, NY 14738 | Gas Operator | Dec 2023 |
| 20108 | Morred, Inc. | Borger, TX 79007 | Oil & Gas Operator | Apr 2025 |
| 20109 | Morrell, W. R. | Albany, TX 76430 | Oil & Gas Operator | Apr 2025 |
| 20110 | Morris & Associates | Purcell, OK 73080 | Oil Operator | Feb 2012 |
| 20111 | Morris & Morris | | Oil Operator | Sep 1995 |
| 20112 | Morris A Richardson Dba Fair VIew Production | Muldrow, OK 74948 | Oil Operator | Sep 2006 |
| 20113 | Morris Beall Oil & Gas Co | | Oil & Gas Operator | Dec 2021 |
| 20114 | Morris Dennis J | Cameron, OK 74932-2186 | Gas Operator | Jan 2025 |
| 20115 | Morris Ed Dba Morris Operating Company | Mounds, OK 74047-4801 | Oil & Gas Operator | Feb 2025 |
| 20116 | Morris Everett E | | Oil & Gas Operator | Feb 1991 |
| 20117 | Morris Oil & Gas Co., Inc | | Oil & Gas Operator | Dec 2021 |
| 20118 | Morris Oil Operations | | Oil Operator | Dec 2024 |
| 20119 | Morris Operating Co | Lovington, NM 88260 | Oil & Gas Operator | Apr 2025 |
| 20120 | Morris Pete Drilling Company | | Oil Operator | Feb 1999 |
| 20121 | Morris R. Greenhaw Oil&Gas, Inc | Desdemona, TX 76445 | Oil & Gas Operator | Apr 2025 |
| 20122 | Morris Richard B | | Oil Operator | Dec 1996 |
| 20123 | Morris Roger Dan | Cushing, OK 74023 | Oil & Gas Operator | Dec 2024 |
| 20124 | Morris, Carl R | | Oil & Gas Operator | Dec 2015 |
| 20125 | Morris, Stanley A. | Cherry Creek, NY 14723 | Gas Operator | Dec 2023 |
| 20126 | Morris, W. Dale Inc. | Mineral Wells, TX 76068 | Oil & Gas Operator | Apr 2025 |
| 20127 | Morrison DRLG. & Prod. Co., Inc. | Abilene, TX 79606 | Oil & Gas Operator | Nov 2008 |
| 20128 | Morrison International Energy Inc | Oklahoma City, OK 73189-0537 | Oil & Gas Operator | Dec 2024 |
| 20129 | Morrison Oil Co. LLC | | Oil & Gas Operator | Dec 2024 |
| 20130 | Morrison Oil Company | Bartlesville, OK 74003 | Oil Operator | Mar 2015 |
| 20131 | Morrison, Mark L. | Yates Center, KS 66783 | Oil Operator | Dec 2024 |
| 20132 | Morrison-Dixon O | | Oil Operator | Oct 1993 |
| 20133 | Morrow Oil & Gas Co. | Terry, MS 39170 | Oil & Gas Operator | Feb 2025 |
| 20134 | Morrow Operating Co., Inc. | | Oil Operator | Mar 2003 |
| 20135 | Morrow Resources, Inc. | San Angelo, TX 76904 | Oil & Gas Operator | Oct 2004 |
| 20136 | Morrow, Joe | Farmington, NM 87401 | Oil Operator | Jan 1993 |
| 20137 | Morrows Stoney Point Farm Inc | New Concord, OH 43762 | Oil & Gas Operator | Dec 2017 |
| 20138 | Morse, John R. | Portland, NY 14769 | Gas Operator | Dec 2023 |
| 20139 | Morsey Oil & Gas | | Oil & Gas Operator | Mar 1995 |
| 20140 | Morsey Oil & Gas Corporation | Corpus Chrsti, TX 78401 | Oil & Gas Operator | Apr 2025 |
| 20141 | Mortimer Exploration Company | San Antonio, TX 78209 | Oil & Gas Operator | Sep 2003 |
| 20142 | Mortimer Production Company | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2025 |
| 20143 | Morton And Dolley | | Oil Operator | Dec 1991 |
| 20144 | Morton Bros A Partnership | Bristow, OK 74010-0403 | Oil & Gas Operator | Jul 2003 |
| 20145 | Morton Brothers Company | Bristow, OK 74010 | Oil & Gas Operator | May 2009 |
| 20146 | Morton Drilling Company | Bristow, OK 74010-1279 | Oil & Gas Operator | Jun 1995 |
| 20147 | Morton Leases | Morris, OK 74445-2048 | Oil & Gas Operator | Jul 2017 |
| 20148 | Morton Leases Inc | | Oil & Gas Operator | Jan 2025 |
| 20149 | Morton Production Inc | Ada, OK 74820-2643 | Oil & Gas Operator | Sep 2014 |
| 20150 | Morton Valley Oil & Gas, Inc. | Dallas, TX 75222 | Oil & Gas Operator | Jun 2007 |
| 20151 | Morton, J. V. Oil Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 1999 |
| 20152 | Mosaic Midland LLC | Dallas, TX 75367 | Oil Operator | Apr 2025 |
| 20153 | Mosaic Oil LLC | Dallas, TX 75205 | Oil & Gas Operator | Apr 2025 |
| 20154 | Mosaic Pecos LLC | Dallas, TX 75367 | Oil Operator | Apr 2025 |
| 20155 | Mosaic Texas LLC | Dallas, TX 75205 | Oil & Gas Operator | Apr 2025 |
| 20156 | Mosbacher Energy Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 20157 | Mosbacher Production Co. | Houston, TX 77001 | Oil & Gas Operator | Aug 1984 |
| 20158 | Mosbacher, Robert-Pruet, Chesley | | Oil & Gas Operator | Dec 1983 |
| 20159 | Moseley Petroleum Corp. | | Oil & Gas Operator | Apr 1988 |
| 20160 | Moseley, J. T. | Temple, TX 76502 | Oil & Gas Operator | Sep 2008 |
| 20161 | Moses Gas, Inc. | Indore, WV 25111-0100 | Gas Operator | Dec 2018 |
| 20162 | Moses, Tom | Beaumont, TX 77702 | Oil Operator | Apr 2025 |
| 20163 | Mosher Gas, LLC | Knoxville, PA 16928 | Gas Operator | Dec 2023 |
| 20164 | Moskowitz Charles J | | Oil Operator | Feb 2014 |
| 20165 | Moskowitz Oil & Gas LLC | | Oil Operator | Jun 2024 |
| 20166 | Mosley Oil &Gas Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 2025 |
| 20167 | Mosman Operating, LLC | Dallas, TX 75204 | Oil Operator | Apr 2025 |
| 20168 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Apr 2025 |
| 20169 | Moss Properties Inc | | Oil & Gas Operator | Mar 1986 |
| 20170 | Moss SWD, LLC | Andrews, TX 79714 | Oil Operator | Apr 2025 |
| 20171 | Moss Ted A Operating Company | Oklahoma City, OK 73126-0187 | Oil & Gas Operator | Jun 1997 |
| 20172 | Moss William Properties Inc | Dallas, TX 75219 | Oil & Gas Operator | Apr 2014 |
| 20173 | Moss, William Corp. | Dallas, TX 75219 | Oil & Gas Operator | Oct 2002 |
| 20174 | Mossholder Drilling Co | Newark, OH 43055 | Oil Operator | Dec 1990 |
| 20175 | Mossholder Linda Dba | Newark, OH 43055 | Oil & Gas Operator | Dec 2015 |
| 20176 | Mossor, Kenneth Everett | Ellenboro, WV 26346-0057 | Oil & Gas Operator | Dec 2021 |
| 20177 | Mossor, L. E. | Harrisville, WV 26362-0000 | Oil & Gas Operator | Dec 2002 |
| 20178 | Mosthaf Edwin C And Mosthaf Levina M | | Oil Operator | Jul 2020 |
| 20179 | Mote Resources, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2004 |
| 20180 | Mott Energy LLC | Riverview, FL 33569-6702 | Oil & Gas Operator | Sep 2024 |
| 20181 | Mott Oil & Gas | Sugarland, TX 77478 | Oil & Gas Operator | May 2001 |
| 20182 | Mott Petroleum Corporation | Sugar Land, TX 77487 | Oil & Gas Operator | Aug 2024 |
| 20183 | Motto Energy Inc. | Normantown, WV 25267-8215 | Oil & Gas Operator | Dec 2021 |
| 20184 | Mount Chestnut Dev LLC | Butler, PA 16002-3940 | Gas Operator | Dec 2017 |
| 20185 | Mount Richard | Newark, OH 43055 | Oil Operator | Dec 2005 |
| 20186 | Mount, Thomas | North East, PA 16428 | Gas Operator | Dec 2023 |
| 20187 | Mountain Creek Energy Inc | Georgetown, TX 78633 | Oil & Gas Operator | Jan 2025 |
| 20188 | Mountain Creek Oil Company, Inc. | Saint Jo, TX 76265 | Oil & Gas Operator | Apr 2025 |
| 20189 | Mountain Divide, LLC | | Oil & Gas Operator | Mar 2017 |
| 20190 | Mountain DRLG, Inc | Hindman, KY 41822 | Oil & Gas Operator | Dec 2023 |
| 20191 | Mountain Front Pipeline Co, Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 20192 | Mountain Fuel Supply Co | Salt Lake City, UT 84139 | Oil & Gas Operator | May 1984 |
| 20193 | Mountain Hawk Energy LLC | Athens, TX 75751 | Gas Operator | Jan 2015 |
| 20194 | Mountain Oil And Gas Inc | Roosevelt, UT 84066 | Oil & Gas Operator | Feb 2025 |
| 20195 | Mountain Pacific General Inc. | Cut Bank, MT 59427 | Oil & Gas Operator | Jun 2022 |
| 20196 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 20197 | Mountain Resource Corporation | Salt Lake City, UT 84124 | Oil & Gas Operator | Dec 1988 |
| 20198 | Mountain State Oil Company, L..L.C. | Pennsboro, WV 26415-0014 | Oil & Gas Operator | Dec 2021 |
| 20199 | Mountain State Well Tending | Hurricane, WV 25526-0000 | Oil & Gas Operator | Dec 2021 |
| 20200 | Mountain States Petroleum Corp | Midland, TX 79702 | Oil & Gas Operator | Apr 2008 |