| NANovus Analytical Technologies, INC. | Sandy | UT | — | ◐ LIKELY ACTIVE |
| NWNOV - Waycross | Waycross | GA | 20–99 | ◐ LIKELY ACTIVE |
| NINowak INC. | Wharton | NJ | — | ◐ LIKELY ACTIVE |
| NCNoytech CORP. | Sun Valley | CA | — | ◐ LIKELY ACTIVE |
| NNNPF ( Northern Plains Finishing) | Casselton | ND | 1–19 | ◐ LIKELY ACTIVE |
| NMNPI Medical Inc | Antioch | IL | 20–99 | ◐ LIKELY ACTIVE |
| NMNPI Medical (Westfall Technik, LLC) | Ansonia | CT | 100–499 | ◐ LIKELY ACTIVE |
| NCNPK Carencro, LA | Carencro | LA | 100–499 | ◐ LIKELY ACTIVE |
| NMNRE Mt. Vernon | Mount Vernon | IL | 20–99 | ◐ LIKELY ACTIVE |
| NPNRE Paducah Locomotive | Paducah | KY | 20–99 | ◐ LIKELY ACTIVE |
| NSNRE Silvis | Silvis | IL | 1–19 | ◐ LIKELY ACTIVE |
| NDNRS DBA Lakeland Center Plant 2 | Lakeland | FL | 20–99 | ◐ LIKELY ACTIVE |
| NDNRS DBS Lakeland Center Plant 1 | Lakeland | FL | 20–99 | ◐ LIKELY ACTIVE |
| NDNtt Devices America, INC. | San Jose | CA | — | ◐ LIKELY ACTIVE |
| NWNuark Warehouse & Logistics | Blytheville | AR | 20–99 | ◐ LIKELY ACTIVE |
| NMNuclear Measurements CORP | Indianapolis | IN | — | ◐ LIKELY ACTIVE |
| NDNucor Data Systems | Madison | IN | 20–99 | ◐ LIKELY ACTIVE |
| NHNucor Harris Rebar Mid-Atlantic LLC (Baltimore Facility) | Baltimore | MD | 20–99 | ◐ LIKELY ACTIVE |
| NHNucor Harris Rebar Northeast LLC (Bethlehem Facility) | Bethlehem | PA | 20–99 | ◐ LIKELY ACTIVE |
| NHNucor Harris Rebar Northeast LLC (Canaan Facility) | Canaan | NH | 20–99 | ◐ LIKELY ACTIVE |
| NHNucor Harris Rebar Northeast LLC (Pawtucket Facility) | Pawtucket | RI | 20–99 | ◐ LIKELY ACTIVE |
| NHNucor Harris Rebar Northeast LLC (South Deerfield Facility) | South Deerfield | MA | 20–99 | ◐ LIKELY ACTIVE |
| NINucor Insulated Panel Group INC | Lewisville | TX | — | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC Bourbonnais, Illinois | Bourbonnais | IL | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC Lansing, Michigan | Lansing | MI | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC Marion, Ohio | Marion | OH | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC Mooresville, Indiana | Mooresville | IN | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC - Newton Iowa | Newton | IA | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC - Roberts Wisonsin | Roberts | WI | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC Rockford, Illinois | Rockford | IL | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC - Sedalia Missouri | Sedalia | MO | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Midwest LLC - St. Louis Missouri | Saint Louis | MO | 1–19 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Services Center Corp | Fort Wayne | IN | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Southcentral LLC - Dallas Texas | Dallas | TX | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Southcentral LLC - Houston Texas | Dayton | TX | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Southcentral LLC - Jackson Mississippi | Flowood | MS | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Southcentral LLC - Jewett Texas | Jewett | TX | 20–99 | ◐ LIKELY ACTIVE |
| NRNucor Rebar Fabrication Southcentral LLC - Slidell Louisiana | Slidell | LA | 20–99 | ◐ LIKELY ACTIVE |
| NSNucor Skyline | Huger | SC | 20–99 | ◐ LIKELY ACTIVE |
| NTNucor Towers and Structures Indiana | New Ross | IN | 100–499 | ◐ LIKELY ACTIVE |
| NTNucor Towers & Structures Inc | West Hazleton | PA | 100–499 | ◐ LIKELY ACTIVE |
| NDNucor (Vulcraft Division) | Saint Joe | IN | 100–499 | ◐ LIKELY ACTIVE |
| NWNucor Warehouse Systems | Houston | TX | 100–499 | ◐ LIKELY ACTIVE |
| NWNucor Warehouse Systems | Monroe | GA | 100–499 | ◐ LIKELY ACTIVE |
| NWNucor Warehouse Systems Vernon | Vernon | CA | 100–499 | ◐ LIKELY ACTIVE |
| NENuena Enterprises, LLC | Houston | TX | — | ◐ LIKELY ACTIVE |
Nueyes Technologies INC | Seal Beach | CA | — | ◐ LIKELY ACTIVE |
| NINuno Iron & Mfg. Inc. | King City | CA | 20–99 | ◐ LIKELY ACTIVE |
| NLNuport LLC | Stanley | NC | 20–99 | ◐ LIKELY ACTIVE |
| NLNuquantic LLC | Baltimore | MD | — | ◐ LIKELY ACTIVE |