| 4201 | National Oil Company (Ohio) The | Columbus, OH 43215 | Oil & Gas Operator | Sep 1999 |
| 4202 | Native Exploration Operating LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Dec 2024 |
| 4203 | Native Gas Company LLC | Edmond, OK 73083-7435 | Oil & Gas Operator | Mar 2015 |
| 4204 | Natomas North America Inc | | Oil & Gas Operator | Aug 1993 |
| 4205 | Natural Gas Anadarko Company | Perryton, TX 79070 | Oil & Gas Operator | Mar 2025 |
| 4206 | Natural Gas Anadarko Inc | Perryton, TX 79070 | Oil & Gas Operator | May 1999 |
| 4207 | Natural Gas Compression Corp | Cleveland, OK 74020 | Oil & Gas Operator | Nov 2024 |
| 4208 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 4209 | Natural Gas Resources Inc | Davenport, IA 52809-1675 | Oil & Gas Operator | Oct 2022 |
| 4210 | Natural Progression Oil & Gas Corp | Stillwater, OK 74075 | Oil & Gas Operator | Jan 2025 |
| 4211 | Natural Resources Operating LLC | Norman, OK 73071-1295 | Oil & Gas Operator | Jan 2023 |
| 4212 | Navajo Exploration, Inc. | Corpus Chrsti, TX 78410 | Oil & Gas Operator | Mar 2025 |
| 4213 | Navidad Operating Company, LLC | Flint, TX 75762 | Oil & Gas Operator | Mar 2025 |
| 4214 | Naylor Operating Company LLC | Perryton, TX 79079-9703 | Oil & Gas Operator | Sep 2012 |
| 4215 | Nbi Services, Inc. | Tulsa, OK 74159 | Oil & Gas Operator | Mar 2025 |
| 4216 | NCL Midstream Corp | The Woodlands, TX 77380-3105 | Oil & Gas Operator | Nov 2006 |
| 4217 | Neal Lloyd Wayne | Sapulpa, OK 74066-8216 | Oil Operator | Jan 2021 |
| 4218 | Neas Operating | Pampa, TX 79065 | Oil & Gas Operator | Oct 2011 |
| 4219 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Nov 2024 |
| 4220 | Neilson Inc | Nash, OK 73761-5026 | Oil & Gas Operator | Aug 2022 |
| 4221 | Nelco Oil & Gas | Duncan, OK 73533-1516 | Oil & Gas Operator | Oct 2015 |
| 4222 | Nelson Billy L Trust | Okmulgee, OK 74447-2047 | Oil & Gas Operator | Feb 2015 |
| 4223 | Nelson Exploration Corporation | Cleveland, OK 74020-5725 | Oil & Gas Operator | Dec 2024 |
| 4224 | Nemaha Environmental Services LLC | Enid, OK 73073 | Oil Operator | Nov 2024 |
| 4225 | Neodyne Drilling Corporation | Tulsa, OK 74153-0326 | Oil & Gas Operator | Apr 2020 |
| 4226 | Neok Production Company LLC | Nowata, OK 74048 | Oil & Gas Operator | Dec 2024 |
| 4227 | Neosho Operating Services LLC | Neosho, MO 64850-0179 | Oil Operator | Mar 2017 |
| 4228 | Nerco Oil & Gas, Inc. | | Oil & Gas Operator | Dec 1996 |
| 4229 | New Century Petroleum Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | May 2013 |
| 4230 | New Dominion LLC | Tulsa, OK 74119-3220 | Oil & Gas Operator | Dec 2024 |
| 4231 | New Energy Corporation | Rancho Santa Fe, CA 92067-1990 | Oil & Gas Operator | Jul 2024 |
| 4232 | New Era Gas Co Inc | Bull Shoals, AR 72619-0130 | Gas Operator | Mar 2004 |
| 4233 | New Gulf Resources, LLC | Tulsa, OK 74133 | Oil & Gas Operator | May 2018 |
| 4234 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Mar 2025 |
| 4235 | New Lift Inc | Nowata, OK 74048-0245 | Oil & Gas Operator | Mar 2015 |
| 4236 | New London Oil Inc. | Houston, TX 77253 | Oil & Gas Operator | Aug 2002 |
| 4237 | Newco, Inc. | Oklahoma City, OK 73177 | Oil Operator | Aug 1999 |
| 4238 | Newell Oil And Gas LLC | Shawnee, OK 74801-5783 | Oil & Gas Operator | Jan 2025 |
| 4239 | Newkumet Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 4240 | Newpark Drilling Fluids LLC | Clinton, OK 73601 | Oil Operator | Dec 2013 |
| 4241 | Newpek, LLC | Irving, TX 75039 | Oil & Gas Operator | Sep 2016 |
| 4242 | Nexco Inc | Oklahoma City, OK 73102-6801 | Oil & Gas Operator | Nov 2013 |
| 4243 | Nexsreem Corporation | Tyler, TX 75703 | Oil & Gas Operator | Dec 2020 |
| 4244 | Nextera Energy Power Marketing LLC | Juno Beach, FL 33408 | Oil & Gas Operator | Dec 2024 |
| 4245 | Nexus Resources Corporation | Drumright, OK 74030 | Oil & Gas Operator | Jan 2013 |
| 4246 | NFC Petroleum Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1996 |
| 4247 | Nfcda Energy LLC | Edmond, OK 73013 | Oil & Gas Operator | Jan 2025 |
| 4248 | NGL Crude Logistics LLC | Denver, CO 80209 | Oil Operator | Dec 2024 |
| 4249 | NHH Inc | Oklahoma City, OK 73162-7418 | Oil & Gas Operator | Feb 2002 |
| 4250 | Nichols Operating LLC | Fort Branch, IN 47648 | Oil & Gas Operator | Dec 2021 |
| 4251 | Nichols P B | | Oil & Gas Operator | Nov 2019 |
| 4252 | Nichols Water Service Inc | Forgan, OK 73938 | Oil & Gas Operator | May 2018 |
| 4253 | Nichols, Irl. A. Trust B | Duncan, OK 73534 | Oil & Gas Operator | Sep 2000 |
| 4254 | Nickell Oil Company | Walters, OK 73572-3770 | Oil Operator | Apr 2018 |
| 4255 | Nickle Audrey O | Okmulgee, OK 74447-2823 | Oil & Gas Operator | Apr 2020 |
| 4256 | Nicor Supply Company | Golden, CO 80401 | Oil & Gas Operator | Jun 1993 |
| 4257 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 4258 | Nijean, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Feb 2012 |
| 4259 | Nitro Petroleum Inc | Phoenix, AZ 85016-4599 | Oil & Gas Operator | May 2020 |
| 4260 | Nivens Productions LLC | Coyle, OK 73027-9785 | Oil & Gas Operator | Aug 2024 |
| 4261 | Nixon Properties Inc | Tulsa, OK 74104 | Oil & Gas Operator | Aug 2023 |
| 4262 | Nject Disposal LLC | Houston, TX 77027 | Oil Operator | Mar 2017 |
| 4263 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 4264 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2024 |
| 4265 | Noble Drilling Corp Expl Div | Houston, TX 77042 | Oil & Gas Operator | Feb 1992 |
| 4266 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Mar 2025 |
| 4267 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Mar 2025 |
| 4268 | Noble Operating Company Inc | Garden City, KS 67846 | Oil & Gas Operator | Sep 2014 |
| 4269 | Noble Operating, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Sep 2013 |
| 4270 | Noble Resources Inc | Mannford, OK 74044 | Oil & Gas Operator | Dec 2024 |
| 4271 | Noco Investment Company Inc | Tulsa, OK 74159-0470 | Oil & Gas Operator | Mar 2005 |
| 4272 | Nogp Operating Company Inc | Frisco, TX 75033 | Oil & Gas Operator | Dec 2024 |
| 4273 | Nomoc Oil Company Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2006 |
| 4274 | Nondorf Oil & Gas Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2008 |
| 4275 | Nooner Cynthia | Ratliff City, OK 73481 | Oil Operator | Jan 2025 |
| 4276 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 4277 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Mar 2025 |
| 4278 | Norman Brothers Tank Truck Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | May 2020 |
| 4279 | Norman Kenneth W | Sasakwa, OK 74867-0086 | Oil Operator | Oct 2017 |
| 4280 | Norman Oil Corporation | Abilene, TX 79608 | Oil & Gas Operator | Mar 2000 |
| 4281 | Norman Production Company | Chandler, OK 74834-8538 | Oil & Gas Operator | May 2015 |
| 4282 | Nortex Gas & Oil Co | Tulsa, OK 74135 | Oil & Gas Operator | Sep 1993 |
| 4283 | North American Energy Inc | Duncan, OK 73533-9604 | Oil & Gas Operator | Nov 2000 |
| 4284 | North American Operating, LLC | Ardmore, OK 73401 | Oil Operator | Dec 2024 |
| 4285 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 4286 | North Bound Exploration Co | Pauls Valley, OK 73075-0863 | Oil & Gas Operator | Jan 2018 |
| 4287 | North Canadian Production LLC | Okemah, OK 74859 | Oil Operator | Dec 2024 |
| 4288 | North Central Drilling Co Inc | Mannford, OK 74044 | Oil & Gas Operator | May 2013 |
| 4289 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Mar 2025 |
| 4290 | North Star Exploration Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Dec 2024 |
| 4291 | North Star Petroleum Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1993 |
| 4292 | Northam Oil Company Inc | Ada, OK 74820-3334 | Oil & Gas Operator | Feb 2024 |
| 4293 | Northbrook Oil & Gas Co LLC | Norman, OK 73072 | Oil & Gas Operator | Nov 2014 |
| 4294 | Northbrook Oil & Gas Company | Norman, OK 73070-4916 | Oil & Gas Operator | Jun 2016 |
| 4295 | Northcote Cleveland | Borger, TX 79008 | Oil & Gas Operator | Dec 2024 |
| 4296 | Northeast Shelf LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jun 2017 |
| 4297 | Northern Natural Gas Producing | | Gas Operator | Jan 1991 |
| 4298 | Northern Pump Company | Denver, CO 80202-3130 | Oil & Gas Operator | Feb 2006 |
| 4299 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Jan 2025 |
| 4300 | Northwest Disposal Corporation | Laverne, OK 73848-0504 | Oil & Gas Operator | Jul 2014 |