| 4001 | Nail Stephen Dba Nail Oil & Gas | Maud, OK 74854-0237 | Oil Operator | Mar 2024 |
| 4002 | Nancy Oil & Gas Corp | Tulsa, OK 74101 | Oil Operator | Apr 2020 |
| 4003 | Nard Inc | Buffalo, OK 73834-9737 | Oil Operator | Dec 2005 |
| 4004 | Naro Oil Corporation | Dallas, TX 75230-1986 | Oil & Gas Operator | Nov 2003 |
| 4005 | National Cooperative RFG Assoc | McPherson, KS 67460-1404 | Oil & Gas Operator | Jun 2006 |
| 4006 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 4007 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Feb 2024 |
| 4008 | National Oil Company (Ohio) The | Columbus, OH 43215 | Oil & Gas Operator | Sep 1999 |
| 4009 | Native Exploration Operating LLC | | Oil & Gas Operator | Feb 2024 |
| 4010 | Native Gas Company LLC | Edmond, OK 73083-7435 | Oil & Gas Operator | Mar 2015 |
| 4011 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 4012 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | May 2024 |
| 4013 | Natural Gas Anadarko Inc | Perryton, TX 79070 | Oil & Gas Operator | May 1999 |
| 4014 | Natural Gas Compression Corp | Cleveland, OK 74020-0065 | Oil & Gas Operator | Nov 2023 |
| 4015 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 4016 | Natural Gas Resources Inc | Davenport, IA 52809-1675 | Oil & Gas Operator | Oct 2022 |
| 4017 | Natural Progression Oil & Gas Corp | Stillwater, OK 74076-1843 | Oil & Gas Operator | Mar 2024 |
| 4018 | Natural Resources Operating LLC | Norman, OK 73071-1295 | Oil & Gas Operator | Jan 2023 |
| 4019 | Navajo Exploration, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | May 2024 |
| 4020 | Navidad Operating Company, LLC | Flint, TX 75762 | Oil & Gas Operator | May 2024 |
| 4021 | Naylor Operating Company LLC | Perryton, TX 79079-9703 | Oil & Gas Operator | Sep 2012 |
| 4022 | Nbi Services, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | May 2024 |
| 4023 | NCL Midstream Corp | The Woodlands, TX 77380-3105 | Oil & Gas Operator | Nov 2006 |
| 4024 | Neal Lloyd Wayne | Sapulpa, OK 74066-8216 | Oil Operator | Jan 2021 |
| 4025 | Neas Operating | Pampa, TX 79065 | Oil & Gas Operator | Oct 2011 |
| 4026 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2017 |
| 4027 | Neilson Inc | Nash, OK 73761-5026 | Oil & Gas Operator | Aug 2022 |
| 4028 | Nelco Oil & Gas | Duncan, OK 73533-1516 | Oil & Gas Operator | Oct 2015 |
| 4029 | Nelson Billy L Trust | Okmulgee, OK 74447-2047 | Oil & Gas Operator | Feb 2015 |
| 4030 | Nelson Exploration Corporation | | Oil & Gas Operator | Feb 2024 |
| 4031 | Nemaha Environmental Services LLC | Enid, OK 73703 | Oil Operator | Mar 2024 |
| 4032 | Neodyne Drilling Corporation | Tulsa, OK 74153-0326 | Oil & Gas Operator | Apr 2020 |
| 4033 | Neok Production Company LLC | Nowata, OK 74048-0428 | Oil & Gas Operator | Feb 2024 |
| 4034 | Neosho Operating Services LLC | | Oil Operator | Mar 2017 |
| 4035 | Nerco Oil & Gas, Inc. | | Oil & Gas Operator | Dec 1996 |
| 4036 | New Century Petroleum Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | May 2013 |
| 4037 | New Dominion LLC | Tulsa, OK 74119-3220 | Oil & Gas Operator | Feb 2024 |
| 4038 | New Energy Corporation | Rancho Santa Fe, CA 92067-1990 | Oil & Gas Operator | Feb 2024 |
| 4039 | New Gulf Resources, LLC | Tulsa, OK 74133 | Oil & Gas Operator | May 2018 |
| 4040 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | May 2024 |
| 4041 | New Lift Inc | Nowata, OK 74048-0245 | Oil & Gas Operator | Mar 2015 |
| 4042 | New London Oil Inc. | Houston, TX 77253 | Oil & Gas Operator | Aug 2002 |
| 4043 | Newco, Inc. | Oklahoma City, OK 73177 | Oil Operator | Aug 1999 |
| 4044 | Newell Oil And Gas LLC | Shawnee, OK 74801-5783 | Oil & Gas Operator | Feb 2024 |
| 4045 | Newkumet Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 4046 | Newpark Drilling Fluids LLC | Clinton, OK 73601-1506 | Oil Operator | Dec 2013 |
| 4047 | Newpek, LLC | Irving, TX 75039 | Oil & Gas Operator | Sep 2016 |
| 4048 | Nexco Inc | Oklahoma City, OK 73102-6801 | Oil & Gas Operator | Nov 2013 |
| 4049 | Nexsreem Corporation | | Oil & Gas Operator | Dec 2020 |
| 4050 | Nexus Resources Corporation | Drumright, OK 74030 | Oil & Gas Operator | Jan 2013 |
| 4051 | NFC Petroleum Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1996 |
| 4052 | Nfcda Energy LLC | | Oil & Gas Operator | Mar 2024 |
| 4053 | NGL Crude Logistics LLC | Denver, CO 80220 | Oil Operator | Jan 2024 |
| 4054 | NHH Inc | Oklahoma City, OK 73162-7418 | Oil & Gas Operator | Feb 2002 |
| 4055 | Nichols Operating LLC | Fort Branch, IN 47648 | Oil & Gas Operator | Dec 2021 |
| 4056 | Nichols Water Service Inc | | Oil & Gas Operator | May 2018 |
| 4057 | Nichols, Irl. A. Trust B | Duncan, OK 73534 | Oil & Gas Operator | Sep 2000 |
| 4058 | Nickell Oil Company | Walters, OK 73572-3770 | Oil Operator | Apr 2018 |
| 4059 | Nickle Audrey O | Okmulgee, OK 74447-2823 | Oil & Gas Operator | Apr 2020 |
| 4060 | Nicor Supply Company | Golden, CO 80401 | Oil & Gas Operator | Jun 1993 |
| 4061 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 4062 | Nijean, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Feb 2012 |
| 4063 | Nitro Petroleum Inc | Phoenix, AZ 85016-4599 | Oil & Gas Operator | May 2020 |
| 4064 | Nivens Productions LLC | Coyle, OK 73027-9785 | Oil & Gas Operator | Mar 2023 |
| 4065 | Nixon Properties Inc | Bixby, OK 74008-8025 | Oil & Gas Operator | Aug 2023 |
| 4066 | Nject Disposal LLC | | Oil Operator | Mar 2017 |
| 4067 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 4068 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2024 |
| 4069 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | May 2024 |
| 4070 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | May 2024 |
| 4071 | Noble Operating Company Inc | Garden City, KS 67846 | Oil & Gas Operator | Sep 2014 |
| 4072 | Noble Operating, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Sep 2013 |
| 4073 | Noble Resources Inc | Mannford, OK 74044-0570 | Oil & Gas Operator | Feb 2024 |
| 4074 | Noco Investment Company Inc | Tulsa, OK 74159-0470 | Oil & Gas Operator | Mar 2005 |
| 4075 | Nogp Operating Company LLC | | Oil & Gas Operator | Feb 2024 |
| 4076 | Nondorf Oil & Gas Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2008 |
| 4077 | Nooner Cynthia | Ratliff City, OK 73481-9501 | Oil Operator | Dec 2023 |
| 4078 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 4079 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | May 2024 |
| 4080 | Norman Brothers Tank Truck Inc | Pauls Valley, OK 73075-0863 | Oil & Gas Operator | May 2020 |
| 4081 | Norman Kenneth W | Sasakwa, OK 74867-0086 | Oil Operator | Oct 2017 |
| 4082 | Norman Oil Corporation | Abilene, TX 79608 | Oil & Gas Operator | Mar 2000 |
| 4083 | Norman Production Company | Chandler, OK 74834-8538 | Oil & Gas Operator | May 2015 |
| 4084 | Nortex Gas & Oil Co | Tulsa, OK 74135 | Oil & Gas Operator | Sep 1993 |
| 4085 | North American Energy Inc | Duncan, OK 73533-9604 | Oil & Gas Operator | Nov 2000 |
| 4086 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 4087 | North Bound Exploration Co | Pauls Valley, OK 73075-0863 | Oil & Gas Operator | Jan 2018 |
| 4088 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Feb 2024 |
| 4089 | North Star Exploration Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Feb 2024 |
| 4090 | North Star Petroleum Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1993 |
| 4091 | Northam Oil Company Inc | Ada, OK 74820-3334 | Oil & Gas Operator | Feb 2024 |
| 4092 | Northbrook Oil & Gas Co LLC | Norman, OK 73072 | Oil & Gas Operator | Nov 2014 |
| 4093 | Northbrook Oil & Gas Company | Norman, OK 73070-4916 | Oil & Gas Operator | Jun 2016 |
| 4094 | Northcote Cleveland | | Oil & Gas Operator | Feb 2024 |
| 4095 | Northeast Shelf LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jun 2017 |
| 4096 | Northern Natural Gas Producing | | Gas Operator | Jan 1991 |
| 4097 | Northern Pump Company | Denver, CO 80202-3130 | Oil & Gas Operator | Feb 2006 |
| 4098 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Mar 2024 |
| 4099 | Northwest Disposal Corporation | Laverne, OK 73848-0504 | Oil & Gas Operator | Jul 2014 |
| 4100 | Northwest Exploration Co | Salt Lake City, UT 84108-0900 | Oil & Gas Operator | Sep 1991 |