| 1 | Naftex Operating Company | | Oil & Gas Operator | Sep 2025 |
| 2 | Nahama & Weagant Energy Company | | Oil & Gas Operator | Dec 1997 |
| 3 | Nana Oil & Gas Inc. | | Oil & Gas Operator | Jan 2018 |
| 4 | Nasco Petroleum L.L.C. | | Oil & Gas Operator | Aug 2025 |
| 5 | National Oil Company | Garden City, KS 67846 | Oil & Gas Operator | Jun 2024 |
| 6 | Natural Gas Corp. Of Calif. | | Oil & Gas Operator | Dec 1987 |
| 7 | Navitas Oil & Gas LLC | | Gas Operator | Dec 2012 |
| 8 | Neon Energy Corporation | | Oil Operator | Apr 2014 |
| 9 | New Chaparral Petroleum Inc. | | Oil & Gas Operator | Dec 2005 |
| 10 | New-Lonamen | | Oil & Gas Operator | Dec 2008 |
| 11 | Newbridge Resources, LLC | Houston, TX 77056 | Oil & Gas Operator | Sep 2025 |
| 12 | Newmo Company | | Oil & Gas Operator | Dec 2001 |
| 13 | NGC Energy Company | | Oil & Gas Operator | May 1989 |
| 14 | NMT Oil Company Inc. | | Oil & Gas Operator | Sep 2025 |
| 15 | Noble Energy Inc | Midland, TX 79706 | Oil & Gas Operator | Nov 2025 |
| 16 | Nordic Oil Company | | Oil & Gas Operator | Dec 1999 |
| 17 | North Of River Sanitary District | | Oil & Gas Operator | Dec 2002 |
| 18 | North Valley Gaswell Services | | Gas Operator | Aug 2025 |
| 19 | North Valley Oil & Gas Co. | | Oil & Gas Operator | Dec 1996 |
| 20 | Northern Energy Devel. Co. | | Gas Operator | Dec 1995 |
| 21 | Northern Michigan Expl Co | | Oil & Gas Operator | Jul 1990 |
| 22 | Northstar Resources Inc. | | Gas Operator | Aug 2025 |
| 23 | Northwest Petroleum Inc. | | Oil & Gas Operator | Aug 2025 |
| 24 | Nuwi-Bayshore LLC | | Oil & Gas Operator | Dec 1999 |
| 25 | Ny Oil Inc. | | Oil Operator | Dec 2025 |