| 4001 | Mid-Con Energy Operating, LLC | Tulsa, OK 74136 | Oil & Gas Operator | Mar 2025 |
| 4002 | Mid-Con Gas Corp | Yukon, OK 73099 | Oil & Gas Operator | Feb 2014 |
| 4003 | Mid-Continent Energy Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 4004 | Mid-Continent Petroleum Corp | | Oil & Gas Operator | Mar 2017 |
| 4005 | Mid-Continent Petroleum Management Inc | Cement, OK 73017 | Oil & Gas Operator | Jan 2025 |
| 4006 | Mid-Way Environmental Services Inc | Stroud, OK 74079 | Oil Operator | Feb 2022 |
| 4007 | Midcontinent Oil & Gas Company | Phoenix, AZ 85022-6180 | Oil & Gas Operator | Jun 2012 |
| 4008 | Middle Bay Production Co. Inc. | Houston, TX 77010 | Oil & Gas Operator | Sep 2014 |
| 4009 | Midgard Energy Company | The Woodlands, TX 77380 | Oil & Gas Operator | Dec 2014 |
| 4010 | Midland TMG Inc. | Midland, TX 79705 | Oil & Gas Operator | Apr 2017 |
| 4011 | Midnight Energy Operating LLC | Drumright, OK 74030 | Oil Operator | Jan 2025 |
| 4012 | Midnight Hour LLC | Enid, OK 73702 | Oil & Gas Operator | Apr 2020 |
| 4013 | Midstate Oil & Gas Company | Shawnee, OK 74801 | Oil & Gas Operator | Jan 2025 |
| 4014 | Midstates Oil Company | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 2000 |
| 4015 | Midway Leasing Inc | Haskell, OK 74436-2406 | Oil & Gas Operator | Jan 2024 |
| 4016 | Midway Operating Company, L.L.C. | Woodward, OK 73802 | Oil & Gas Operator | Apr 2025 |
| 4017 | Midwest Energy Corporation | Tulsa, OK 74105-6083 | Oil & Gas Operator | Aug 2016 |
| 4018 | Midwest Enterprises, Inc. | Cashion, OK 73016-9626 | Oil & Gas Operator | Jan 2025 |
| 4019 | Midwest Eor Inc | Tulsa, OK 74105-6059 | Oil & Gas Operator | May 2013 |
| 4020 | Midwest Oil Company | Beggs, OK 74421-2976 | Oil Operator | Apr 2015 |
| 4021 | Midwest Operating Company Inc | Tulsa, OK 74105-6059 | Oil & Gas Operator | Nov 1999 |
| 4022 | Midwest Pipe & Supply Company | Oklahoma City, OK 73154-0245 | Oil & Gas Operator | Dec 2008 |
| 4023 | Midwestern Exploration Co. | Edmond, OK 73013 | Oil & Gas Operator | Dec 2024 |
| 4024 | Migwis Operating LLC | Cushing, OK 74023-4854 | Oil & Gas Operator | Oct 2020 |
| 4025 | Mija LLC | Edmond, OK 73034 | Oil & Gas Operator | Feb 2025 |
| 4026 | Mikal R Brown Oil LLC | Cleveland, OK 74020-6475 | Oil Operator | Dec 2022 |
| 4027 | Mikarden Energy Inc | Sapulpa, OK 74066 | Oil Operator | Jan 2025 |
| 4028 | Mikco Inc | Tulsa, OK 74133 | Oil & Gas Operator | May 2001 |
| 4029 | Milagro Exploration, LLC | Houston, TX 77010 | Oil & Gas Operator | Aug 2018 |
| 4030 | Milburn R Kenneth | Ardmore, OK 73402-1118 | Oil & Gas Operator | Sep 2014 |
| 4031 | Milburn Robert G | Countyline, OK 73025 | Oil Operator | Apr 2020 |
| 4032 | Mild Oil Company | Duncan, OK 73533-9532 | Oil Operator | Mar 2000 |
| 4033 | Miller & Stanley Oper Co | Amarillo, TX 79114 | Oil & Gas Operator | Sep 2014 |
| 4034 | Miller B Investments | Tulsa, OK 74170 | Oil & Gas Operator | Nov 2007 |
| 4035 | Miller Exploration Company | Tulsa, OK 74136-1020 | Oil & Gas Operator | Mar 2015 |
| 4036 | Miller Joe B | Lawton, OK 73507 | Oil Operator | Nov 2024 |
| 4037 | Miller John Production | Bristow, OK 74010-2455 | Oil & Gas Operator | Jul 2016 |
| 4038 | Miller Oil & Gas Co | Okmulgee, OK 74447 | Oil & Gas Operator | Oct 2017 |
| 4039 | Miller Petroleum Company | Yukon, OK 73099-0452 | Oil & Gas Operator | Aug 2009 |
| 4040 | Miller William D | Sapulpa, OK 74066-1061 | Oil Operator | Oct 2010 |
| 4041 | Miller, James R. | Herrington, KS 67449 | Oil Operator | Jan 2025 |
| 4042 | Miller-McGee Operating Inc | Stroud, OK 74079 | Oil & Gas Operator | Jan 2025 |
| 4043 | Milmac Operating Company | Lubbock, TX 79408-2976 | Oil & Gas Operator | Sep 2004 |
| 4044 | Milne Lewis Joel | Allen, OK 74825 | Oil & Gas Operator | Mar 2015 |
| 4045 | Min-Tex Oil Corporation | Tulsa, OK 74170 | Oil & Gas Operator | Dec 1996 |
| 4046 | Miner Rick | Drumright, OK 74030-0373 | Oil & Gas Operator | Jan 2025 |
| 4047 | Miner Rick Oil Inc | Drumright, OK 74030-0373 | Oil & Gas Operator | Apr 2022 |
| 4048 | Minerva Oil Company | Tulsa, OK 74152-0858 | Oil & Gas Operator | Mar 2015 |
| 4049 | Minihan Oil And Gas Company | Seminole, OK 74868-9790 | Oil & Gas Operator | Sep 2014 |
| 4050 | Minihan Production Co | Seminole, OK 74868 | Oil & Gas Operator | Jan 1997 |
| 4051 | Mink Oil Company | | Oil Operator | Nov 2003 |
| 4052 | Mink Richard | Cement, OK 73017 | Oil & Gas Operator | Jan 2025 |
| 4053 | Minor Jr W T | Wichita Falls, TX 76307 | Oil Operator | Nov 1998 |
| 4054 | Minor Mark | FT Worth, TX 76116-1003 | Oil Operator | Nov 2015 |
| 4055 | Minuja Oil And Gas LLC | Corpus Christi, TX 78401 | Oil & Gas Operator | Sep 1996 |
| 4056 | Miracle Production Inc | Yukon, OK 73085-0680 | Oil & Gas Operator | Jun 2007 |
| 4057 | Mission Leasing LTD | Tulsa, OK 74136 | Oil Operator | Dec 2000 |
| 4058 | Mission Oil & Gas | Pawhuska, OK 74056 | Oil Operator | May 2013 |
| 4059 | Mitchell Cecil D | Haskell, OK 74436-7667 | Oil & Gas Operator | Apr 2020 |
| 4060 | Mitchell Drilling Co. | Iowa Park, TX 76367 | Oil & Gas Operator | Nov 2000 |
| 4061 | Mitchell Energy Corp | Houston, TX 77002 | Oil & Gas Operator | Aug 2013 |
| 4062 | Mitchell James D | Bartlesville, OK 74006-7610 | Oil Operator | Jan 2025 |
| 4063 | Mitchell Martha | Henryetta, OK 74437-0488 | Oil & Gas Operator | Apr 2011 |
| 4064 | Miti-Mini Inc | Wetumka, OK 74883-6172 | Gas Operator | Jul 2016 |
| 4065 | Mito Resources LLC | Edmond, OK 73013 | Oil & Gas Operator | Feb 2025 |
| 4066 | Miura Petroleum, Inc. | Topeka, KS 66603 | Oil & Gas Operator | May 2006 |
| 4067 | MJ Goetz Bonding, LLC | Bartlesville, OK 74006 | Oil Operator | Jan 2025 |
| 4068 | MJB Production Company, Inc. | Brownfield, TX 79316 | Oil & Gas Operator | Apr 2025 |
| 4069 | MJM Oil & Gas, Inc. | Dallas, TX 75201 | Oil & Gas Operator | Aug 2003 |
| 4070 | MJM Resources Inc | Norman, OK 73072 | Oil & Gas Operator | Feb 2025 |
| 4071 | MKG Marketing Co | Oklahoma City, OK 73102 | Gas Operator | Feb 2006 |
| 4072 | MLC Resources LLC | Kingfisher, OK 73750-0364 | Oil & Gas Operator | Jan 2025 |
| 4073 | MLT Energy, LLC | Derby, KS 67037 | Oil Operator | Jan 2025 |
| 4074 | Moabb Oil Corp | | Oil & Gas Operator | Apr 1998 |
| 4075 | Mobil Exp & Prod Us Inc | Houston, TX 77060-1991 | Oil & Gas Operator | May 2001 |
| 4076 | Mode Oil & Gasdev LTD12/21/Ofb 9-98 | | Oil & Gas Operator | May 2013 |
| 4077 | Moffitt W G Trust | Fort Gibson, OK 74434-4258 | Gas Operator | Nov 2019 |
| 4078 | Mogul Energy Corp | Los Angeles, CA 90024 | Oil & Gas Operator | Jan 2001 |
| 4079 | Mohawk Drilling Company | | Oil & Gas Operator | Nov 1998 |
| 4080 | Mohawk Operating LLC | Oklahoma City, OK 73173-8907 | Gas Operator | Feb 2004 |
| 4081 | Molz Oil Company | Kiowa, KS 67070 | Oil & Gas Operator | Feb 2025 |
| 4082 | Moms Oil & Gas LLC | Nowata, OK 74048-9436 | Oil & Gas Operator | Mar 2023 |
| 4083 | Monarch Energy Company LLC | Eufaula, OK 74432 | Oil & Gas Operator | Feb 2025 |
| 4084 | Monarch Petroleum Corporation | FT Worth, TX 76102 | Oil & Gas Operator | Dec 2019 |
| 4085 | Moncrief R W Inc | Fort Worth, TX 76102 | Oil & Gas Operator | Dec 1994 |
| 4086 | Moncrief W A Jr | Fort Worth, TX 76102 | Oil & Gas Operator | Feb 2025 |
| 4087 | Monexco | Edmond, OK 73034-3776 | Oil & Gas Operator | Mar 2008 |
| 4088 | Monexco LLC | Dallas, TX 75204-2634 | Oil & Gas Operator | Jan 2025 |
| 4089 | Monexco Operating Company | Dallas, TX 75204-2634 | Oil & Gas Operator | Jan 2025 |
| 4090 | Monroe Natural Gas Inc | Norman, OK 73071 | Oil & Gas Operator | Jan 2025 |
| 4091 | Montclair Energy LLC | Edmond, OK 73034-7291 | Oil & Gas Operator | Jan 2025 |
| 4092 | Montego Resources Inc | Oklahoma City, OK 73172-0192 | Oil & Gas Operator | Mar 2015 |
| 4093 | Monterey Production Company LLC | Tulsa, OK 74136 | Oil & Gas Operator | Feb 2025 |
| 4094 | Montex Exploration Company | Houston, TX 77057 | Oil & Gas Operator | Mar 2011 |
| 4095 | Montgomery Exploration Co LTD | Dallas, TX 75204-2634 | Oil & Gas Operator | Jan 2025 |
| 4096 | Montgomery Jake E | Henryetta, OK 74437 | Oil & Gas Operator | Jan 2025 |
| 4097 | Montgomery Oil & Gas Expl Inc | Tulsa, OK 74170-1884 | Oil & Gas Operator | Mar 2005 |
| 4098 | Monty L Hott Production Corporation | Oklahoma City, OK 73142 | Oil & Gas Operator | Jan 2025 |
| 4099 | Moore & Moore Energy Inc | Purcell, OK 73080-0674 | Oil & Gas Operator | Dec 2012 |
| 4100 | Moore Clay | Bradenton, FL 34211 | Oil & Gas Operator | Jan 2025 |