| 4101 | New Century Petroleum Corp | Oklahoma City, OK 73105 | Oil & Gas Operator | May 2013 |
| 4102 | New Dominion LLC | Tulsa, OK 74119-3220 | Oil & Gas Operator | Sep 2024 |
| 4103 | New Energy Corporation | Rancho Santa Fe, CA 92067-1990 | Oil & Gas Operator | Jul 2024 |
| 4104 | New Gulf Resources, LLC | Tulsa, OK 74133 | Oil & Gas Operator | May 2018 |
| 4105 | New Horizon Resources LLC | Houston, TX 77057 | Oil & Gas Operator | Nov 2024 |
| 4106 | New Lift Inc | Nowata, OK 74048-0245 | Oil & Gas Operator | Mar 2015 |
| 4107 | New London Oil Inc. | Houston, TX 77253 | Oil & Gas Operator | Aug 2002 |
| 4108 | Newco, Inc. | Oklahoma City, OK 73177 | Oil Operator | Aug 1999 |
| 4109 | Newell Oil And Gas LLC | Shawnee, OK 74801-5783 | Oil & Gas Operator | Sep 2024 |
| 4110 | Newkumet Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 4111 | Newpark Drilling Fluids LLC | Clinton, OK 73601 | Oil Operator | Dec 2013 |
| 4112 | Newpek, LLC | Irving, TX 75039 | Oil & Gas Operator | Sep 2016 |
| 4113 | Nexco Inc | Oklahoma City, OK 73102-6801 | Oil & Gas Operator | Nov 2013 |
| 4114 | Nexsreem Corporation | Tyler, TX 75703 | Oil & Gas Operator | Dec 2020 |
| 4115 | Nexus Resources Corporation | Drumright, OK 74030 | Oil & Gas Operator | Jan 2013 |
| 4116 | NFC Petroleum Corporation | Tulsa, OK 74121 | Oil & Gas Operator | Jun 1996 |
| 4117 | Nfcda Energy LLC | Edmond, OK 73013 | Oil & Gas Operator | Sep 2024 |
| 4118 | NGL Crude Logistics LLC | Denver, CO 80209 | Oil Operator | Aug 2024 |
| 4119 | NHH Inc | Oklahoma City, OK 73162-7418 | Oil & Gas Operator | Feb 2002 |
| 4120 | Nichols Operating LLC | Fort Branch, IN 47648 | Oil & Gas Operator | Dec 2021 |
| 4121 | Nichols P B | | Oil & Gas Operator | Nov 2019 |
| 4122 | Nichols Water Service Inc | Forgan, OK 73938 | Oil & Gas Operator | May 2018 |
| 4123 | Nichols, Irl. A. Trust B | Duncan, OK 73534 | Oil & Gas Operator | Sep 2000 |
| 4124 | Nickell Oil Company | Walters, OK 73572-3770 | Oil Operator | Apr 2018 |
| 4125 | Nickle Audrey O | Okmulgee, OK 74447-2823 | Oil & Gas Operator | Apr 2020 |
| 4126 | Nicor Supply Company | Golden, CO 80401 | Oil & Gas Operator | Jun 1993 |
| 4127 | Nielson & Associates Inc | Cody, WY 82414 | Oil & Gas Operator | Feb 2016 |
| 4128 | Nijean, Inc. | Shawnee, OK 74802 | Oil & Gas Operator | Feb 2012 |
| 4129 | Nitro Petroleum Inc | Phoenix, AZ 85016-4599 | Oil & Gas Operator | May 2020 |
| 4130 | Nivens Productions LLC | Coyle, OK 73027-9785 | Oil & Gas Operator | Aug 2024 |
| 4131 | Nixon Properties Inc | Tulsa, OK 74104 | Oil & Gas Operator | Aug 2023 |
| 4132 | Nject Disposal LLC | Houston, TX 77027 | Oil Operator | Mar 2017 |
| 4133 | Njre Operating Company | Tulsa, OK 74119 | Gas Operator | Dec 2016 |
| 4134 | NM&O Operating Company | Tulsa, OK 74103 | Oil & Gas Operator | Aug 2024 |
| 4135 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Nov 2024 |
| 4136 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Nov 2024 |
| 4137 | Noble Operating Company Inc | Garden City, KS 67846 | Oil & Gas Operator | Sep 2014 |
| 4138 | Noble Operating, LLC | Flower Mound, TX 75028 | Oil & Gas Operator | Sep 2013 |
| 4139 | Noble Resources Inc | Mannford, OK 74044 | Oil & Gas Operator | Sep 2024 |
| 4140 | Noco Investment Company Inc | Tulsa, OK 74159-0470 | Oil & Gas Operator | Mar 2005 |
| 4141 | Nogp Operating Company Inc | Frisco, TX 75033 | Oil & Gas Operator | Sep 2024 |
| 4142 | Nomoc Oil Company Inc | Oklahoma City, OK 73112 | Oil & Gas Operator | May 2006 |
| 4143 | Nondorf Oil & Gas Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2008 |
| 4144 | Nooner Cynthia | Ratliff City, OK 73481 | Oil Operator | Aug 2024 |
| 4145 | Nordan Oil & Gas Corporation | Abilene, TX 79604 | Oil & Gas Operator | Feb 2018 |
| 4146 | Nordstrand Engineering Inc | Houston, TX 77019 | Oil & Gas Operator | Nov 2024 |
| 4147 | Norman Brothers Tank Truck Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | May 2020 |
| 4148 | Norman Kenneth W | Sasakwa, OK 74867-0086 | Oil Operator | Oct 2017 |
| 4149 | Norman Oil Corporation | Abilene, TX 79608 | Oil & Gas Operator | Mar 2000 |
| 4150 | Norman Production Company | Chandler, OK 74834-8538 | Oil & Gas Operator | May 2015 |
| 4151 | Nortex Gas & Oil Co | Tulsa, OK 74135 | Oil & Gas Operator | Sep 1993 |
| 4152 | North American Energy Inc | Duncan, OK 73533-9604 | Oil & Gas Operator | Nov 2000 |
| 4153 | North American Operating, LLC | Ardmore, OK 73401 | Oil Operator | Sep 2024 |
| 4154 | North American Royalties, Inc. | Chattanooga, TN 37408 | Oil & Gas Operator | Oct 2001 |
| 4155 | North Bound Exploration Co | Pauls Valley, OK 73075-0863 | Oil & Gas Operator | Jan 2018 |
| 4156 | North Lake Resources LLC | Oklahoma City, OK 73132-5182 | Oil & Gas Operator | Sep 2024 |
| 4157 | North Star Exploration Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Aug 2024 |
| 4158 | North Star Petroleum Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1993 |
| 4159 | Northam Oil Company Inc | Ada, OK 74820-3334 | Oil & Gas Operator | Feb 2024 |
| 4160 | Northbrook Oil & Gas Co LLC | Norman, OK 73072 | Oil & Gas Operator | Nov 2014 |
| 4161 | Northbrook Oil & Gas Company | Norman, OK 73070-4916 | Oil & Gas Operator | Jun 2016 |
| 4162 | Northcote Cleveland | Borger, TX 79008 | Oil & Gas Operator | Aug 2024 |
| 4163 | Northeast Shelf LLC | Skiatook, OK 74070 | Oil & Gas Operator | Jun 2017 |
| 4164 | Northern Natural Gas Producing | | Gas Operator | Jan 1991 |
| 4165 | Northern Pump Company | Denver, CO 80202-3130 | Oil & Gas Operator | Feb 2006 |
| 4166 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Sep 2024 |
| 4167 | Northwest Disposal Corporation | Laverne, OK 73848-0504 | Oil & Gas Operator | Jul 2014 |
| 4168 | Northwest Exploration Co | Salt Lake City, UT 84108-0900 | Oil & Gas Operator | Sep 1991 |
| 4169 | Northwest Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Jun 2014 |
| 4170 | Northwind Development Company | | Oil Operator | Oct 1995 |
| 4171 | Northwind Oil Company | Tulsa, OK 74137 | Oil & Gas Operator | May 1998 |
| 4172 | Nossaman E Oil Inc | Del City, OK 73155-5449 | Oil Operator | Oct 2002 |
| 4173 | Notting Hill Energy LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Nov 2024 |
| 4174 | Nova Energy Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2003 |
| 4175 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Sep 2024 |
| 4176 | Nowata Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1997 |
| 4177 | Nowata Petroleum Operating Co | Nowata, OK 74048-9617 | Oil Operator | Aug 2014 |
| 4178 | NRG Oil LLC | Stratford, OK 74872-9732 | Oil Operator | Feb 2012 |
| 4179 | NTR Energy LLC | Caney, KS 67333 | Oil & Gas Operator | Apr 2020 |
| 4180 | Nub'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Sep 2024 |
| 4181 | Nutt Jerrie | Duncan, OK 73534-0698 | Oil & Gas Operator | Nov 2016 |
| 4182 | NWM Operating Inc | Okeene, OK 73763 | Oil & Gas Operator | Sep 2024 |
| 4183 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | Sep 2024 |
| 4184 | Nyc Resources LTD | Tulsa, OK 74133-5700 | Oil & Gas Operator | Sep 2014 |
| 4185 | Nye Oil Company | Oklahoma City, OK 73118-1245 | Oil & Gas Operator | Jun 2004 |
| 4186 | Nytex Energy LLC | Edmond, OK 73083-5946 | Oil & Gas Operator | Sep 2015 |
| 4187 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |
| 4188 | O G & E | Oklahoma City, OK 73124 | Oil & Gas Operator | Feb 2014 |
| 4189 | O K Swabbing Inc | Hennessey, OK 73742 | Oil & Gas Operator | Aug 2024 |
| 4190 | O'Blue Corp. | Kerrville, TX 78028 | Oil & Gas Operator | Mar 1998 |
| 4191 | O'Brien Energy Resources Corp | Portsmouth, NH 03801 | Oil & Gas Operator | Nov 2024 |
| 4192 | O'Brien Oil Corporation | Guthrie, OK 73044-3154 | Oil & Gas Operator | Aug 2024 |
| 4193 | O'Brien Oil LLC | Guthrie, OK 73044-3154 | Oil & Gas Operator | Apr 2020 |
| 4194 | O'Brien Resources LLC | Shreveport, LA 71136 | Oil Operator | Nov 2017 |
| 4195 | O'Donnell Bill C | Tulsa, OK 74135-4241 | Oil & Gas Operator | Oct 2014 |
| 4196 | O'Hern Morris D | Mounds, OK 74047-5163 | Oil & Gas Operator | Sep 2016 |
| 4197 | O'Neal Oil & Gas Co | Fort Worth, TX 76107-1479 | Oil & Gas Operator | Sep 2024 |
| 4198 | O'Neal Oil Company | Nocona, TX 76255 | Oil & Gas Operator | Nov 2024 |
| 4199 | O'Neal, Lindell | Nocona, TX 76255 | Oil & Gas Operator | Aug 2024 |
| 4200 | O'Neill Properties, LTD. | Midland, TX 79702 | Oil & Gas Operator | Nov 2024 |