| 1 | N & N Oil LLC | Duncan, OK 73533 | Oil & Gas Operator | May 2023 |
| 2 | Nabors Well Services LTD | Houston, TX 77067-4536 | Oil Operator | Apr 2011 |
| 3 | Nadel And Gussman, L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
| 4 | Nard Inc | Buffalo, OK 73834-9737 | Oil Operator | Dec 2005 |
| 5 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 6 | Natural Resources Operating LLC | Norman, OK 73071-1295 | Oil & Gas Operator | Jan 2023 |
| 7 | Navidad Operating Company, LLC | Flint, TX 75762 | Oil & Gas Operator | Dec 2024 |
| 8 | Neg Operating LLC | Oklahoma City, OK 73101 | Oil & Gas Operator | Apr 2017 |
| 9 | Newkumet Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 10 | Nexco Inc | Oklahoma City, OK 73102-6801 | Oil & Gas Operator | Nov 2013 |
| 11 | Nexsreem Corporation | Tyler, TX 75703 | Oil & Gas Operator | Dec 2020 |
| 12 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 13 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 14 | Nondorf Oil & Gas Inc | Oklahoma City, OK 73154 | Oil & Gas Operator | Feb 2008 |
| 15 | Nooner Cynthia | Ratliff City, OK 73481 | Oil Operator | Oct 2024 |
| 16 | North American Energy Inc | Duncan, OK 73533-9604 | Oil & Gas Operator | Nov 2000 |
| 17 | Northbrook Oil & Gas Co LLC | Norman, OK 73072 | Oil & Gas Operator | Nov 2014 |
| 18 | Northbrook Oil & Gas Company | Norman, OK 73070-4916 | Oil & Gas Operator | Jun 2016 |
| 19 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Sep 2024 |
| 20 | Nub'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Oct 2024 |