| 1 | N & N Oil LLC | Duncan, OK 73533 | Oil & Gas Operator | May 2023 |
| 2 | Nadel And Gussman, L.L.C. | Tulsa, OK 74103 | Oil & Gas Operator | Dec 2024 |
| 3 | National Energy Group Inc | Dallas, TX 75206 | Oil & Gas Operator | Sep 2014 |
| 4 | Native Exploration Operating LLC | Oklahoma City, OK 73102-5804 | Oil & Gas Operator | Sep 2024 |
| 5 | Natural Gas Pipeline Co Of Am LLC | Downers Grove, IL 60515-3708 | Oil & Gas Operator | Mar 2015 |
| 6 | Neok Production Company LLC | Nowata, OK 74048 | Oil & Gas Operator | Oct 2024 |
| 7 | Newkumet Exploration, Inc. | Midland, TX 79702 | Oil & Gas Operator | Dec 2020 |
| 8 | Nexco Inc | Oklahoma City, OK 73102-6801 | Oil & Gas Operator | Nov 2013 |
| 9 | Nitro Petroleum Inc | Phoenix, AZ 85016-4599 | Oil & Gas Operator | May 2020 |
| 10 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Dec 2024 |
| 11 | Noble Energy Production Inc | Houston, TX 77067 | Oil & Gas Operator | Dec 2024 |
| 12 | Nooner Cynthia | Ratliff City, OK 73481 | Oil Operator | Oct 2024 |
| 13 | Norman Brothers Tank Truck Inc | Pauls Valley, OK 73075 | Oil & Gas Operator | May 2020 |
| 14 | North American Energy Inc | Duncan, OK 73533-9604 | Oil & Gas Operator | Nov 2000 |
| 15 | North Bound Exploration Co | Pauls Valley, OK 73075-0863 | Oil & Gas Operator | Jan 2018 |
| 16 | Northbrook Oil & Gas Co LLC | Norman, OK 73072 | Oil & Gas Operator | Nov 2014 |
| 17 | Northbrook Oil & Gas Company | Norman, OK 73070-4916 | Oil & Gas Operator | Jun 2016 |
| 18 | Northport Production Company | Oklahoma City, OK 73113 | Oil & Gas Operator | Sep 2024 |
| 19 | NRG Oil LLC | Stratford, OK 74872-9732 | Oil Operator | Feb 2012 |
| 20 | Nub'S Well Servicing Inc | Ratliff City, OK 73481 | Oil & Gas Operator | Oct 2024 |
| 21 | Nutt Jerrie | Duncan, OK 73534-0698 | Oil & Gas Operator | Nov 2016 |