| 4001 | Moore W T | Sapulpa, OK 74067-0946 | Oil & Gas Operator | Jan 2021 |
| 4002 | Moran Oil Enterprises LLC | Seminole, OK 74818 | Oil & Gas Operator | Dec 2019 |
| 4003 | Moran Pipe & Supply Co Inc | Seminole, OK 74868 | Oil & Gas Operator | Jan 2019 |
| 4004 | Moran-K Oil LLC | Seminole, OK 74868 | Oil & Gas Operator | Nov 2025 |
| 4005 | Moran-Kahn Oil | Seminole, OK 74868 | Oil & Gas Operator | Mar 1992 |
| 4006 | Morgan David E | Enid, OK 73702-3525 | Oil & Gas Operator | Sep 2016 |
| 4007 | Morgan Energy Corporation | Englewood, CO 80110 | Oil & Gas Operator | Mar 2006 |
| 4008 | Morgan Oil Company | Nacogdoches, TX 75963 | Oil & Gas Operator | May 2006 |
| 4009 | Morgan Petroleum Company | Edmond, OK 73083 | Oil & Gas Operator | Mar 1993 |
| 4010 | Morgan Robert M / L Ladean | Wewoka, OK 74884 | Oil & Gas Operator | Jul 2015 |
| 4011 | Morris & Associates | Purcell, OK 73080 | Oil Operator | Feb 2012 |
| 4012 | Morris Dennis J | Cameron, OK 74932-2186 | Gas Operator | Oct 2025 |
| 4013 | Morris Ed Dba Morris Operating Company | Mounds, OK 74047-4801 | Oil & Gas Operator | Oct 2025 |
| 4014 | Morris Pete Drilling Company | | Oil Operator | Feb 1999 |
| 4015 | Morris Roger Dan | Cushing, OK 74023 | Oil & Gas Operator | Sep 2025 |
| 4016 | Morrison International Energy Inc | Oklahoma City, OK 73189-0537 | Oil & Gas Operator | Feb 2025 |
| 4017 | Morrison Oil Company | Bartlesville, OK 74003 | Oil Operator | Mar 2015 |
| 4018 | Morton Bros A Partnership | Bristow, OK 74010-0403 | Oil & Gas Operator | Jul 2003 |
| 4019 | Morton Brothers Company | Bristow, OK 74010 | Oil & Gas Operator | May 2009 |
| 4020 | Morton Drilling Company | Bristow, OK 74010-1279 | Oil & Gas Operator | Jun 1995 |
| 4021 | Morton Leases | Morris, OK 74445-2048 | Oil & Gas Operator | Jul 2017 |
| 4022 | Morton Leases Inc | | Oil & Gas Operator | Oct 2025 |
| 4023 | Morton Production Inc | Ada, OK 74820-2643 | Oil & Gas Operator | Sep 2014 |
| 4024 | Moss Ted A Operating Company | Oklahoma City, OK 73126-0187 | Oil & Gas Operator | Jun 1997 |
| 4025 | Moss William Properties Inc | Dallas, TX 75219 | Oil & Gas Operator | Apr 2014 |
| 4026 | Mote Resources, Inc. | Dallas, TX 75225 | Oil & Gas Operator | Dec 2004 |
| 4027 | Mott Energy LLC | Riverview, FL 33569-6702 | Oil & Gas Operator | Sep 2024 |
| 4028 | Mott Oil & Gas | Sugarland, TX 77478 | Oil & Gas Operator | May 2001 |
| 4029 | Mott Petroleum Corporation | Sugar Land, TX 77487 | Oil & Gas Operator | Aug 2024 |
| 4030 | Mountain Creek Energy Inc | Georgetown, TX 78633 | Oil & Gas Operator | Sep 2025 |
| 4031 | Mowdy Robert F | Coalgate, OK 74538 | Oil & Gas Operator | May 2001 |
| 4032 | Mozark Corporation | Spring, TX 77379-8049 | Oil & Gas Operator | Jan 2011 |
| 4033 | Moze Inc | Ochelata, OK 74051 | Oil & Gas Operator | Jan 2001 |
| 4034 | MRD Nowata LLC | Woodstock, GA 30189 | Oil Operator | Aug 2017 |
| 4035 | MSB Operating Company | Enid, OK 73703 | Oil & Gas Operator | Jan 2005 |
| 4036 | MT Dora Energy Corporation | Duncan, OK 73533-1829 | Oil & Gas Operator | Apr 2014 |
| 4037 | MT Dora Energy LLC | Houston, OK 77056-1940 | Oil & Gas Operator | Jun 2019 |
| 4038 | MT Energy LLC | Waskom, TX 75692 | Oil & Gas Operator | Dec 2025 |
| 4039 | Mto Oil Company | Okay, OK 74446-0354 | Oil Operator | Jul 2019 |
| 4040 | Mud Operations Inc | Ames, OK 73718-9501 | Oil & Gas Operator | Nov 2025 |
| 4041 | Muegge Don E | Lamont, OK 74643-5010 | Oil & Gas Operator | Dec 1996 |
| 4042 | Mueggenborg Derrick R Dba DRM Oil & Gas | Yale, OK 74085 | Oil Operator | Oct 2025 |
| 4043 | Mueller Thomas C | Fort Smith, AR 72913 | Gas Operator | Aug 2008 |
| 4044 | Mueller Thomas C LTD | Oklahoma City, OK 73102-5683 | Gas Operator | Aug 2008 |
| 4045 | Muirfield Resources Company | Tulsa, OK 74101-3166 | Oil & Gas Operator | Jun 2024 |
| 4046 | Mullen William Company | Edmond, OK 73083-1372 | Oil & Gas Operator | May 1999 |
| 4047 | Mullins Jimmy R Dba Southcreek Petroleum Co | Dibble, OK 73031 | Oil & Gas Operator | Jan 2021 |
| 4048 | Mullins, John S | | Oil Operator | Nov 2014 |
| 4049 | Multistates Oil Properties, NV | Oklahoma City, OK 73112 | Oil & Gas Operator | Nov 1998 |
| 4050 | Munson Dave Company | Dallas, TX 75201-3591 | Oil Operator | Aug 1996 |
| 4051 | Munson, David M. | Dallas, TX 75201 | Oil & Gas Operator | Mar 2015 |
| 4052 | Muras Energy Inc | Edmond, OK 73013 | Oil & Gas Operator | Oct 2025 |
| 4053 | Murchison Oil & Gas Inc | Plano, TX 75024 | Oil & Gas Operator | Aug 2020 |
| 4054 | Murexco Petroleum Inc | Dallas, TX 75251 | Oil & Gas Operator | Oct 1996 |
| 4055 | Murphy Helen Colpitt Trust | Collinsville, OK 74021-0128 | Oil & Gas Operator | May 2002 |
| 4056 | Murphy Jack L | Tulsa, OK 74104-4915 | Oil Operator | Mar 2015 |
| 4057 | Musgrove Casey Oil | Ponca City, OK 74602-0391 | Oil & Gas Operator | Jun 2017 |
| 4058 | Musgrove Energy Inc | Ponca City, OK 74602 | Oil & Gas Operator | Sep 2025 |
| 4059 | Mustang Fuel Corp. Of Oklahoma | Oklahoma City, OK 73106 | Oil & Gas Operator | Nov 2016 |
| 4060 | Mustang Fuel Corporation | Oklahoma City, OK 73114 | Oil & Gas Operator | Nov 2025 |
| 4061 | Mustang Gas Products LLC | Oklahoma City, OK 73114-7406 | Oil & Gas Operator | Sep 2022 |
| 4062 | Mutual Oil & Gas Co | Akron, OH 44311 | Oil & Gas Operator | Dec 2000 |
| 4063 | MW Petroleum Corporation | Houston, TX 77056 | Oil & Gas Operator | Mar 2015 |
| 4064 | MXP Operating LLC | Covington, TX 76093 | Oil & Gas Operator | Aug 2025 |
| 4065 | Myers, Robert L | | Oil Operator | Oct 2025 |
| 4066 | Myjo Oil Corporation | Breckenridge, TX 76024 | Oil Operator | Jul 1996 |
| 4067 | Mystique Resources Company | Aurora, CO 80016 | Oil & Gas Operator | Feb 2023 |
| 4068 | N & N Oil LLC | Duncan, OK 73533 | Oil & Gas Operator | May 2023 |
| 4069 | N L S Inc | Kimberling City, MO 65686 | Oil & Gas Operator | Aug 2016 |
| 4070 | Nabob Production Company | Amarillo, TX 79105 | Gas Operator | Dec 1991 |
| 4071 | Nabors Well Services LTD | Houston, TX 77067-4536 | Oil Operator | Apr 2011 |
| 4072 | Nadel And Gussman LLC | Tulsa, OK 74119 | Oil & Gas Operator | Dec 2025 |
| 4073 | Naifco Oil & Gas LLC | Oklahoma City, OK 73107 | Oil & Gas Operator | Nov 2025 |
| 4074 | Nail Stephen Dba Nail Oil & Gas | Maud, OK 74854 | Oil Operator | Aug 2025 |
| 4075 | Nancy Oil & Gas Corp | Tulsa, OK 74101 | Oil Operator | Apr 2020 |
| 4076 | Nard Inc | Buffalo, OK 73834-9737 | Oil Operator | Dec 2005 |
| 4077 | Naro Oil Corporation | Dallas, TX 75230-1986 | Oil & Gas Operator | Nov 2003 |
| 4078 | National Cooperative RFG Assoc | McPherson, KS 67460-1404 | Oil & Gas Operator | Oct 2025 |
| 4079 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 4080 | National Oil Co Ohio The | Columbus, OH 43215 | Oil & Gas Operator | Sep 1999 |
| 4081 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 4082 | Native Exploration Operating LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Aug 2025 |
| 4083 | Native Gas Company LLC | Edmond, OK 73083-7435 | Oil & Gas Operator | Mar 2015 |
| 4084 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 4085 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | Dec 2025 |
| 4086 | Natural Gas Anadarko Inc | Perryton, TX 79070 | Oil & Gas Operator | May 1999 |
| 4087 | Natural Gas Compression Corp | Cleveland, OK 74020 | Oil & Gas Operator | Jan 2025 |
| 4088 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 4089 | Natural Gas Resources Inc | Davenport, IA 52809-1675 | Oil & Gas Operator | Oct 2022 |
| 4090 | Natural Progression Oil & Gas Corp | Stillwater, OK 74075 | Oil & Gas Operator | Nov 2025 |
| 4091 | Natural Resources Operating LLC | Norman, OK 73071-1295 | Oil & Gas Operator | Jan 2023 |
| 4092 | Navajo Exploration, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Dec 2025 |
| 4093 | Navidad Operating Company, LLC | Flint, TX 75762 | Oil & Gas Operator | Jan 2025 |
| 4094 | Naylor Operating Company LLC | Perryton, TX 79079-9703 | Oil & Gas Operator | Sep 2012 |
| 4095 | Nbi Services, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Dec 2025 |
| 4096 | Neal Lloyd Wayne | Sapulpa, OK 74066-8216 | Oil Operator | Jan 2021 |
| 4097 | Neas Operating | Pampa, TX 79065 | Oil & Gas Operator | Oct 2011 |
| 4098 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Aug 2025 |
| 4099 | Neilson Inc | Nash, OK 73761 | Oil & Gas Operator | Aug 2022 |
| 4100 | Nelco Oil & Gas | Duncan, OK 73533-1516 | Oil & Gas Operator | Oct 2015 |