| 4101 | Nelson Billy L Trust | Okmulgee, OK 74447-2047 | Oil & Gas Operator | Feb 2015 |
| 4102 | Nelson Exploration Corporation | Cleveland, OK 74020-5725 | Oil & Gas Operator | Nov 2025 |
| 4103 | Nemaha Environmental Services LLC | Kremlin, OK 73753 | Oil Operator | Nov 2024 |
| 4104 | Neodyne Drilling Corporation | Tulsa, OK 74153-0326 | Oil & Gas Operator | Apr 2020 |
| 4105 | Neok Production Company LLC | Nowata, OK 74048 | Oil & Gas Operator | Nov 2025 |
| 4106 | Neosho Operating Services LLC | Neosho, MO 64850-0179 | Oil Operator | Mar 2017 |
| 4107 | Nerco Oil & Gas Inc | | Oil & Gas Operator | Dec 1996 |
| 4108 | Network Support Group LLC | Jennings, OK 74038 | Oil & Gas Operator | May 2025 |
| 4109 | New Century Petroleum Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | May 2013 |
| 4110 | New Dominion LLC | Tulsa, OK 74119-3220 | Oil & Gas Operator | Nov 2025 |
| 4111 | New Energy Corporation | Rancho Santa Fe, CA 92067-1990 | Oil & Gas Operator | Jul 2024 |
| 4112 | New Era Gas Co Inc | Bull Shoals, AR 72619-0130 | Gas Operator | Mar 2004 |
| 4113 | New Gulf Resources, LLC | Tulsa, OK 74133 | Oil & Gas Operator | May 2018 |
| 4114 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Dec 2025 |
| 4115 | New Lift Inc | Nowata, OK 74048-0245 | Oil & Gas Operator | Mar 2015 |
| 4116 | New London Oil Inc. | Houston, TX 77253 | Oil & Gas Operator | Aug 2002 |
| 4117 | Newco Inc | Oklahoma City, OK 73177 | Oil Operator | Aug 1999 |
| 4118 | Newell Oil And Gas LLC | Shawnee, OK 74801-5783 | Oil & Gas Operator | Oct 2025 |
| 4119 | Newkumet Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 4120 | Newpark Drilling Fluids LLC | Clinton, OK 73601 | Oil Operator | Dec 2013 |
| 4121 | Newpek, LLC | Irving, TX 75039 | Oil & Gas Operator | Sep 2016 |
| 4122 | Nexco Inc | Oklahoma City, OK 73102-6801 | Oil & Gas Operator | Nov 2013 |
| 4123 | Nexstreem Corporation | | Oil & Gas Operator | Dec 2020 |
| 4124 | Nexus Resources Corporation | Drumright, OK 74030 | Oil & Gas Operator | Jan 2013 |
| 4125 | NFC Petroleum Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1996 |
| 4126 | Nfcda Energy LLC | Edmond, OK 73013 | Oil & Gas Operator | Nov 2025 |
| 4127 | NHH Inc | Oklahoma City, OK 73162-7418 | Oil & Gas Operator | Feb 2002 |
| 4128 | Nichols Operating LLC | Fort Branch, IN 47648 | Oil & Gas Operator | Dec 2021 |
| 4129 | Nichols Water Service Inc | Forgan, OK 73938 | Oil & Gas Operator | May 2018 |
| 4130 | Nichols, Irl. A. Trust B | Duncan, OK 73534 | Oil & Gas Operator | Sep 2000 |
| 4131 | Nickell Oil Company | Walters, OK 73572 | Oil Operator | Apr 2018 |
| 4132 | Nickle Audrey O | Okmulgee, OK 74447-2823 | Oil & Gas Operator | Apr 2020 |
| 4133 | Nicor Supply Company | Golden, CO 80401 | Oil & Gas Operator | Jun 1993 |
| 4134 | Nielson & Associates, Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 4135 | Nijean, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Feb 2012 |
| 4136 | Nitro Petroleum Inc | Phoenix, AZ 85016-4599 | Oil & Gas Operator | May 2020 |
| 4137 | Nivens Productions LLC | Coyle, OK 73027-9785 | Oil & Gas Operator | Aug 2024 |
| 4138 | Nixon Properties Inc | Tulsa, OK 74104 | Oil & Gas Operator | Aug 2023 |
| 4139 | Nject Disposal LLC | Houston, TX 77027 | Oil Operator | Mar 2017 |
| 4140 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 4141 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Feb 2025 |
| 4142 | Noble Drilling Corp Expl Div | Houston, TX 77042 | Oil & Gas Operator | Feb 1992 |
| 4143 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2025 |
| 4144 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Dec 2025 |
| 4145 | Noble Operating Company Inc | Garden City, KS 67846 | Oil & Gas Operator | Sep 2014 |
| 4146 | Noble Operating, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Sep 2013 |
| 4147 | Noble Resources Inc | Mannford, OK 74044 | Oil & Gas Operator | Nov 2025 |
| 4148 | Noco Investment Company Inc | Tulsa, OK 74159-0470 | Oil & Gas Operator | Mar 2005 |
| 4149 | Nodding Donkey Resources LLC | Oklahoma City, OK 73112 | Oil Operator | Oct 2025 |
| 4150 | Nogp Operating Company Inc | Tomball, TX 77377 | Oil & Gas Operator | Nov 2025 |
| 4151 | Nomoc Oil Company Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2006 |
| 4152 | Nondorf Oil & Gas Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2008 |
| 4153 | Nooner Cynthia | Ratliff City, OK 73481 | Oil Operator | Oct 2025 |
| 4154 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 4155 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Dec 2025 |
| 4156 | Norman Brothers Tank Truck Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | May 2020 |
| 4157 | Norman Kenneth W | Sasakwa, OK 74867-0086 | Oil Operator | Oct 2017 |
| 4158 | Norman Oil Corporation | Abilene, TX 79608 | Oil & Gas Operator | Mar 2000 |
| 4159 | Norman Production Company | Chandler, OK 74834-8538 | Oil & Gas Operator | May 2015 |
| 4160 | Nortex Gas & Oil Co | Tulsa, OK 74135 | Oil & Gas Operator | Sep 1993 |
| 4161 | North American Energy Inc | Duncan, OK 73533-9604 | Oil & Gas Operator | Nov 2000 |
| 4162 | North American Operating, LLC | Ardmore, OK 73401 | Oil & Gas Operator | Nov 2025 |
| 4163 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 4164 | North Bound Exploration Co | Pauls Valley, OK 73075-0863 | Oil & Gas Operator | Jan 2018 |
| 4165 | North Canadian Production LLC | Okemah, OK 74859 | Oil & Gas Operator | Oct 2025 |
| 4166 | North Central Drilling Co Inc | Mannford, OK 74044 | Oil & Gas Operator | May 2013 |
| 4167 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Dec 2025 |
| 4168 | North Star Exploration Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 4169 | North Star Petroleum Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1993 |
| 4170 | Northam Oil Company Inc | Ada, OK 74820-3334 | Oil & Gas Operator | Feb 2025 |
| 4171 | Northbrook Oil & Gas Co LLC | Norman, OK 73072 | Oil & Gas Operator | Nov 2014 |
| 4172 | Northbrook Oil & Gas Company | Norman, OK 73070-4916 | Oil & Gas Operator | Jun 2016 |
| 4173 | Northcote Cleveland LLC | Borger, TX 79008 | Oil & Gas Operator | Oct 2025 |
| 4174 | Northeast Shelf Energy, L.L.C. | | Oil & Gas Operator | Jun 2017 |
| 4175 | Northern Pump Company | Denver, CO 80202-3130 | Oil & Gas Operator | Feb 2006 |
| 4176 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Oct 2025 |
| 4177 | Northwest Disposal Corporation | Laverne, OK 73848-0504 | Oil & Gas Operator | Jul 2014 |
| 4178 | Northwest Exploration Co | Salt Lake City, UT 84108-0900 | Oil & Gas Operator | Sep 1991 |
| 4179 | Northwest Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Jun 2014 |
| 4180 | Northwind Development Company | | Oil Operator | Oct 1995 |
| 4181 | Northwind Oil Company | Tulsa, OK 74137 | Oil & Gas Operator | May 1998 |
| 4182 | Nossaman E Oil Inc | Del City, OK 73155-5449 | Oil Operator | Oct 2002 |
| 4183 | Notting Hill Energy LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Dec 2025 |
| 4184 | Nova Energy Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2003 |
| 4185 | Novo II Operating, LLC | Oklahoma City, OK 73116 | Gas Operator | Nov 2025 |
| 4186 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Dec 2025 |
| 4187 | Nowata Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1997 |
| 4188 | Nowata Petroleum Operating Co | Nowata, OK 74048-9617 | Oil Operator | Aug 2014 |
| 4189 | NRG Oil LLC | Stratford, OK 74872-9732 | Oil Operator | Feb 2012 |
| 4190 | NS Oil LLC | Minneapolis, MN 55410 | Oil Operator | Oct 2025 |
| 4191 | NTR Energy LLC (Osage Cty Only) | | Oil & Gas Operator | Apr 2020 |
| 4192 | Nub'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Nov 2025 |
| 4193 | Nutt Jerrie | Duncan, OK 73534-0698 | Oil & Gas Operator | Nov 2016 |
| 4194 | NV O&G Investments LLC /Osage Only | | Oil Operator | Sep 2022 |
| 4195 | NWM Operating Inc | Okeene, OK 73763 | Oil & Gas Operator | Oct 2025 |
| 4196 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | Oct 2025 |
| 4197 | Nyc Resources LTD | Tulsa, OK 74133-5700 | Oil & Gas Operator | Sep 2014 |
| 4198 | Nye Oil Company | Oklahoma City, OK 73118-1245 | Oil & Gas Operator | Jun 2004 |
| 4199 | Nytex Energy LLC | Edmond, OK 73083-5946 | Oil & Gas Operator | Sep 2015 |
| 4200 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |