| 101 | North Lake Resources LLC | Oklahoma City, OK 73132 | Oil & Gas Operator | Feb 2026 |
| 102 | North Star Exploration Company | Oklahoma City, OK 73116 | Oil & Gas Operator | Oct 2025 |
| 103 | North Star Petroleum Corp. | San Antonio, TX 78209 | Oil & Gas Operator | Oct 1993 |
| 104 | Northam Oil Company Inc | Ada, OK 74820-3334 | Oil & Gas Operator | Feb 2025 |
| 105 | Northbrook Oil & Gas Co LLC | Norman, OK 73072 | Oil & Gas Operator | Nov 2014 |
| 106 | Northbrook Oil & Gas Company | Norman, OK 73070-4916 | Oil & Gas Operator | Jun 2016 |
| 107 | Northcote Cleveland LLC | Borger, TX 79008 | Oil & Gas Operator | Oct 2025 |
| 108 | Northeast Production Co Inc | | Oil & Gas Operator | May 2013 |
| 109 | Northeast Shelf Energy, L.L.C. | | Oil & Gas Operator | Jun 2017 |
| 110 | Northern Pump Company | Denver, CO 80202-3130 | Oil & Gas Operator | Feb 2006 |
| 111 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Oct 2025 |
| 112 | Northwest Disposal Corporation | Laverne, OK 73848-0504 | Oil & Gas Operator | Jul 2014 |
| 113 | Northwest Exploration Co | Salt Lake City, UT 84108-0900 | Oil & Gas Operator | Sep 1991 |
| 114 | Northwest Oil Company | Dallas, TX 75204 | Oil & Gas Operator | Jun 2014 |
| 115 | Northwind Development Company | | Oil Operator | Oct 1995 |
| 116 | Northwind Oil Company | Tulsa, OK 74137 | Oil & Gas Operator | May 1998 |
| 117 | Nossaman E Oil Inc | Del City, OK 73155-5449 | Oil Operator | Oct 2002 |
| 118 | Notting Hill Energy LLC | Fort Worth, TX 76101 | Oil & Gas Operator | Feb 2026 |
| 119 | Nova Energy Corporation | Denver, CO 80201 | Oil & Gas Operator | Jun 2003 |
| 120 | Novo II Operating, LLC | Oklahoma City, OK 73116 | Gas Operator | Dec 2025 |
| 121 | Novy Oil & Gas, Inc. | Goddard, KS 67052 | Oil & Gas Operator | Dec 2025 |
| 122 | Nowata Gas Company | Tulsa, OK 74136 | Oil & Gas Operator | Sep 1997 |
| 123 | Nowata Petroleum Operating Co | Nowata, OK 74048-9617 | Oil Operator | Aug 2014 |
| 124 | NRG Oil LLC | Stratford, OK 74872-9732 | Oil Operator | Feb 2012 |
| 125 | NS Oil LLC | Minneapolis, MN 55410 | Oil Operator | Oct 2025 |
| 126 | NTR Energy LLC (Osage Cty Only) | | Oil & Gas Operator | Apr 2020 |
| 127 | Nub'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Nov 2025 |
| 128 | Nutt Jerrie | Duncan, OK 73534-0698 | Oil & Gas Operator | Nov 2016 |
| 129 | NV O&G Investments LLC /Osage Only | | Oil Operator | Sep 2022 |
| 130 | NWM Operating Inc | Okeene, OK 73763 | Oil & Gas Operator | Oct 2025 |
| 131 | NWM Properties LLC | Tulsa, OK 74131-4426 | Oil Operator | Oct 2025 |
| 132 | Nyc Resources LTD | Tulsa, OK 74133-5700 | Oil & Gas Operator | Sep 2014 |
| 133 | Nye Oil Company | Oklahoma City, OK 73118-1245 | Oil & Gas Operator | Jun 2004 |
| 134 | Nytex Energy LLC | Edmond, OK 73083-5946 | Oil & Gas Operator | Sep 2015 |
| 135 | Nytex, L.L.C. | Edmond, OK 73083 | Oil & Gas Operator | Feb 2006 |