| 2101 | Morton Drilling Company | Bristow, OK 74010-1279 | Oil & Gas Operator | Jun 1995 |
| 2102 | Morton Leases | Morris, OK 74445-2048 | Oil & Gas Operator | Jul 2017 |
| 2103 | Morton Leases Inc | | Oil & Gas Operator | Dec 2023 |
| 2104 | Morton Production Inc | Ada, OK 74820-2643 | Oil & Gas Operator | Sep 2014 |
| 2105 | Morton, J. V. Oil Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 1999 |
| 2106 | Mosaic Midland LLC | Dallas, TX 75367 | Oil Operator | Apr 2024 |
| 2107 | Mosaic Oil LLC | Dallas, TX 75205 | Oil & Gas Operator | Apr 2024 |
| 2108 | Mosaic Pecos LLC | Dallas, TX 75367 | Oil Operator | Apr 2024 |
| 2109 | Mosaic Texas LLC | Dallas, TX 75205 | Oil & Gas Operator | Apr 2024 |
| 2110 | Mosbacher Energy Company | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 2111 | Mosbacher Production Co. | Houston, TX 77001 | Oil & Gas Operator | Aug 1984 |
| 2112 | Mosbacher, Robert-Pruet, Chesley | | Oil & Gas Operator | Dec 1983 |
| 2113 | Moseley Petroleum Corp. | | Oil & Gas Operator | Apr 1988 |
| 2114 | Moseley, J. T. | Temple, TX 76502 | Oil & Gas Operator | Sep 2008 |
| 2115 | Moses, Tom | Beaumont, TX 77702 | Oil Operator | Apr 2024 |
| 2116 | Mosher Gas, LLC | Knoxville, PA 16928 | Gas Operator | Dec 2022 |
| 2117 | Moskowitz Charles J | | Oil Operator | Feb 2014 |
| 2118 | Moskowitz Oil & Gas LLC | | Oil Operator | Dec 2021 |
| 2119 | Mosley Oil &Gas Inc | Houston, TX 77002 | Oil & Gas Operator | Apr 2024 |
| 2120 | Mosman Operating, LLC | Dallas, TX 75204 | Oil Operator | Apr 2024 |
| 2121 | Moss Petroleum Company | Dallas, TX 75207 | Oil & Gas Operator | Apr 2024 |
| 2122 | Moss Properties Inc | | Oil & Gas Operator | Mar 1986 |
| 2123 | Moss SWD, LLC | Booker, TX 79005 | Oil Operator | Apr 2024 |
| 2124 | Moss Ted A Operating Company | Oklahoma City, OK 73126-0187 | Oil & Gas Operator | Jun 1997 |
| 2125 | Moss, William Corp. | Dallas, TX 75219 | Oil & Gas Operator | Oct 2002 |
| 2126 | Mossholder Drilling Co | Newark, OH 43055 | Oil Operator | Dec 1990 |
| 2127 | Mossholder Linda Dba | Newark, OH 43055 | Oil & Gas Operator | Dec 2015 |
| 2128 | Mossor, Kenneth Everett | Ellenboro, WV 26346-0057 | Oil & Gas Operator | Dec 2021 |
| 2129 | Mosthaf Edwin C And Mosthaf Levina M | | Oil Operator | Jul 2020 |
| 2130 | Mote Resources, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2004 |
| 2131 | Mott Energy LLC | Riverview, FL 33569-6702 | Oil & Gas Operator | Dec 2023 |
| 2132 | Mott Oil & Gas | Sugarland, TX 77478 | Oil & Gas Operator | May 2001 |
| 2133 | Mott Petroleum Corporation | Sugar Land, TX 77487-3058 | Oil & Gas Operator | Nov 2023 |
| 2134 | Motto Energy Inc. | Normantown, WV 25267-8215 | Oil & Gas Operator | Dec 2021 |
| 2135 | Mount Chestnut Dev LLC | Butler, PA 16002-3940 | Gas Operator | Dec 2017 |
| 2136 | Mount Richard | Newark, OH 43055 | Oil Operator | Dec 2005 |
| 2137 | Mountain Creek Energy Inc | Georgetown, TX 78633 | Oil & Gas Operator | Dec 2023 |
| 2138 | Mountain Creek Oil Company, Inc. | Saint Jo, TX 76265 | Oil & Gas Operator | Apr 2024 |
| 2139 | Mountain Divide, LLC | | Oil & Gas Operator | Mar 2017 |
| 2140 | Mountain Front Pipeline Co, Inc | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2015 |
| 2141 | Mountain Fuel Supply Co | Salt Lake City, UT 84139 | Oil & Gas Operator | May 1984 |
| 2142 | Mountain Hawk Energy LLC | Athens, TX 75751 | Gas Operator | Jan 2015 |
| 2143 | Mountain Oil And Gas Inc | Roosevelt, UT 84066 | Oil & Gas Operator | Jan 2024 |
| 2144 | Mountain Pacific General Inc. | Cut Bank, MT 59427 | Oil & Gas Operator | Jun 2022 |
| 2145 | Mountain Petroleum Corp | Denver, CO 80202 | Oil & Gas Operator | Jan 2016 |
| 2146 | Mountain Resource Corporation | Salt Lake City, UT 84124 | Oil & Gas Operator | Dec 1988 |
| 2147 | Mountain State Oil Company, L..L.C. | Pennsboro, WV 26415-0014 | Oil & Gas Operator | Dec 2021 |
| 2148 | Mountain State Production, Inc | | Gas Operator | Dec 2022 |
| 2149 | Mountain State Well Tending | Hurricane, WV 25526-0000 | Oil & Gas Operator | Dec 2021 |
| 2150 | Mountain States Petroleum Corp | Midland, TX 79702 | Oil & Gas Operator | Apr 2008 |
| 2151 | Mountain States Resources Inc | Cut Bank, MT 59427 | Oil & Gas Operator | Oct 2000 |
| 2152 | Mountain V Oil & Gas, Inc. | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 2153 | Mountain V, LLC | Buckhannon, WV 26201 | Oil & Gas Operator | Dec 2021 |
| 2154 | Mountain VIew Resources LLC | | Oil & Gas Operator | Dec 2023 |
| 2155 | Mountaineer Gas Transmission, Inc. | Fort Worth, TX 76185-0000 | Oil & Gas Operator | Dec 2021 |
| 2156 | Mountaineer State Energy, Inc. | Dallas, TX 75234 | Oil & Gas Operator | Dec 2021 |
| 2157 | Mountaineer State Operations, LLC | Sandyville, WV 25275 | Oil & Gas Operator | Dec 2023 |
| 2158 | Mountaineer Trading Company, LLC | Charleston, WV 25314 | Oil & Gas Operator | Dec 2016 |
| 2159 | Mountaintop Baking Co | Kimper, KY 41539 | Gas Operator | Dec 2022 |
| 2160 | Mowata Oil Company | Victoria, TX 77903 | Oil & Gas Operator | Oct 1996 |
| 2161 | Moxy Oil Company | Seguin, TX 78155 | Oil & Gas Operator | Aug 2003 |
| 2162 | Moy, Gary | Falls City, TX 78113 | Oil & Gas Operator | Nov 1998 |
| 2163 | Moylan, Jimmie C. | Eastland, TX 76448 | Oil & Gas Operator | Apr 2024 |
| 2164 | Moylan, Thomas F. | Lacygne, KS 66040 | Oil & Gas Operator | Dec 1993 |
| 2165 | Mozark Corporation | Spring, TX 77379-8049 | Oil & Gas Operator | Jan 2011 |
| 2166 | Moze Inc | Ochelata, OK 74051 | Oil & Gas Operator | Jan 2001 |
| 2167 | MPG Petroleum | San Antonio, TX 78217 | Oil & Gas Operator | Aug 2003 |
| 2168 | MPG Petroleum, Inc. | San Antonio, TX 78209 | Oil & Gas Operator | Apr 2024 |
| 2169 | Mr NM Operating LLC | Dallas, TX 75225 | Oil & Gas Operator | Jan 2024 |
| 2170 | Mr Oil Company | Monahans, TX 79756 | Oil & Gas Operator | Nov 2004 |
| 2171 | MRD Nowata LLC | | Oil Operator | Aug 2017 |
| 2172 | MRD Operating LLC | | Oil & Gas Operator | Dec 2016 |
| 2173 | MRD Operating LLC (Delaware) | Houston, TX 77010 | Oil & Gas Operator | Jul 2015 |
| 2174 | Mri Ventures, Inc. | | Oil Operator | Dec 1993 |
| 2175 | Mroz Baier, Christine | Memphis, TN 38120 | Gas Operator | Dec 2022 |
| 2176 | MRR Oil Inc. | Perryton, TX 79070 | Oil & Gas Operator | Jun 2002 |
| 2177 | Mrs. C. M. Roberson | | Oil Operator | Mar 1989 |
| 2178 | Mrs. Cecile Andries & Sons | | Oil Operator | Dec 2006 |
| 2179 | MRT Exploration Co | | Oil & Gas Operator | Feb 1983 |
| 2180 | MS Producing LLC | Creston, OH 44217 | Oil & Gas Operator | Dec 2023 |
| 2181 | MS United, LLC | | Oil & Gas Operator | Nov 2023 |
| 2182 | MSB Operating | Wichita Falls, TX 76308 | Oil & Gas Operator | Apr 2024 |
| 2183 | MSB Operating Company | Enid, OK 73703 | Oil & Gas Operator | Jan 2005 |
| 2184 | MSD Energy, Inc | Rapid City, SD 57702 | Oil & Gas Operator | Dec 2020 |
| 2185 | MSD Operating, LLC | Big Spring, TX 79721 | Oil & Gas Operator | Apr 2024 |
| 2186 | Mse Operating Corp. | Beaverton, OR 97008 | Oil & Gas Operator | Apr 2024 |
| 2187 | MSG Resources Inc. | Iola, KS 66749 | Oil Operator | Dec 2023 |
| 2188 | MSL Oil & Gas Corp | Bradford, PA 16701-0151 | Oil & Gas Operator | Dec 2023 |
| 2189 | MSN Oil, Inc. | Avoca, TX 79503 | Oil Operator | Apr 2024 |
| 2190 | MSR Exploration, Inc. | Winters, TX 79567 | Oil & Gas Operator | Mar 2000 |
| 2191 | MSSK Consulting LLC | San Antonio, TX 78253 | Oil Operator | Apr 2024 |
| 2192 | MT Dora Energy Corporation | Duncan, OK 73533-1829 | Oil & Gas Operator | Apr 2014 |
| 2193 | MT Dora Energy LLC | Houston, OK 77056-1940 | Oil & Gas Operator | Jun 2019 |
| 2194 | MT Energy LLC | Waskom, TX 75692 | Oil & Gas Operator | Apr 2024 |
| 2195 | MT. Crescent Operating Company, LLC | | Oil & Gas Operator | Jan 2024 |
| 2196 | MTBB Acquisition Company, LLC | Houston, TX 77002 | Oil & Gas Operator | Aug 2022 |
| 2197 | MTG Operating Inc | Ridgeland, MS 39158 | Gas Operator | Apr 2011 |
| 2198 | MTM Petroleum, Inc. | Kingman, KS 67068 | Oil & Gas Operator | Dec 2023 |
| 2199 | MTN Energy | Aleppo, PA 15310 | Oil & Gas Operator | Dec 2023 |
| 2200 | MTN V Oil & Gas Inc | Indiana, PA 15701-8914 | Oil & Gas Operator | Jan 2024 |