| Mercury Marine | Fond du Lac | 1939 |
| Metro-Goldwyn-Mayer | Los Angeles | 17 de abril de 1924 |
| MGA Entertainment | Los Angeles | 1979 |
| MGM Television | Beverly Hills | 1956 |
| Milwaukee Electric Tool Corporation | Brookfield | 1924 |
| Missouri Pacific Railroad | St. Louis | 1917 |
| Mistwalker | Tóquio, Japão, Honolulu | 2004 |
| MITRE Corporation | Bedford | 1958 |
| Mobil Oil | Fairfax | 1966 |
| Moderna Therapeutics | Cambridge | 2010 |
| Modulus Graphite | Richmond | 1978 |
| Molex | Lisle | 1938 |
| Mondo Mini Shows | São Francisco | 1988 |
| MoneyGram | Dallas | 1940 |
| Monster | Guaynabo | 1999 |
| Monster Beverage | Minnesota | 1935 |
| MOS Technology | Norristown | 1969 |
| Mosrite | Arizona | 1956 |
| MSA Safety | Pittsburgh, Cranberry Township | 1914 |
| MSCI | Nova Iorque | 1969 |
| MUFG Union Bank | São Francisco | 1864 |
| Mutual Film Corporation | Edendale | julho 1906 |
| México. | Roma, San Clemente | 1999 |
| Narus | Sunnyvale | 1997 |
| National Geographic Partners | Nova Iorque | 9 de setembro de 2015 |
| Neon | Nova Iorque | 2017 |
| Netgear | São José, Dover | 1996 |
| NetJets | Columbus | 1964 |
| Neuberger Berman | Nova Iorque | 1939 |
| New York Life Insurance Company | Nova Iorque | 1845 |
| New York Mercantile Exchange | Nova Iorque | 1872 |
| New York Shipbuilding Corporation | Camden | 1899 |
| News Corp | Nova Iorque | 28 de junho de 2013 |
| NeXT | Palo Alto, Redwood City | 20 de junho de 1985 |
| NextEra Energy | Juno Beach | 1925 |
| Nielsen Company | Nova Iorque | 1994 |
| Nik Software | San Diego | 1995 |
| Nike | Beaverton | 25 de janeiro de 1964 |
| Northrop Corporation | Hawthorne | 1939 |
| Norwegian Cruise Line | Condado de Miami-Dade | 1966 |
| Nuance | Burlington | 1992 |
| NullSoft | Phoenix | 1997 |
| Nutanix | São José | 2009 |
| O Principal Financial Group | Des Moines | 1879 |
| O.F. Mossberg & Sons | North Haven | 1919 |
| Oakley, Inc. | Foothill Ranch | 1975 |
| Obsidian Entertainment | Irvine | 12 de junho de 2003 |
| Occidental Petroleum | Houston | 1920 |