| Mopar | Chrysler Headquarters and Technology Center | 1933 |
| Morgan Stanley | Nova Iorque | 1931 |
| Motorola Solutions | Chicago | 4 de janeiro de 2011 |
| MPEG LA | Denver | 1996 |
| Music Man | San Luis Obispo | 1971 |
| National Semiconductor | Santa Clara | 1959 |
| National Wrestling Alliance | Houston | 1948 |
| Navteq | Chicago | 1985 |
| NBCUniversal | GE Building | 1926 |
| NCR | Atlanta, Augsburgo | 1884 |
| Netgear | São José, Dover | 1996 |
| Netscape | Mountain View | 4 de abril de 1994 |
| NetSuite | Austin | 1998 |
| Network Solutions | Herndon | 1979 |
| Neuberger Berman | Nova Iorque | 1939 |
| NexGen | Milpitas | 1986 |
| NeXT | Palo Alto, Redwood City | 20 de junho de 1985 |
| Noble Energy | Houston | 1932 |
| Northern Trust | Illinois, Chicago | 1889 |
| Nuance | Burlington | 1992 |
| Oakley, Inc. | Foothill Ranch | 1975 |
| Office Depot | Boca Raton | 1986 |
| Ohio Valley Wrestling | Louisville | 1997 |
| Onsemi | Scottsdale | 18 de junho de 1992 |
| Open Invention Network | Durham, Nova Iorque | 10 de novembro de 2005 |
| OQO | São Francisco | 2000 |
| Oshkosh Corporation | Oshkosh | 1917 |
| Owens-Illinois | Toledo, Perrysburg | 1903 |
| Paccar | Bellevue | 1905 |
| Packard Bell | Chatsworth | 1926 |
| Pantone | Carlstadt | 1962 |
| Parametric Technology Corporation | Boston | maio 1985 |
| Peabody Energy | St. Louis | 1883 |
| Peet's Coffee | Emeryville | 1966 |
| PeopleSoft | Pleasanton, Califórnia | 1987 |
| PepsiCo | Purchase | 1961 |
| Philip Morris International | Stamford, Lausana | 1987 |
| Pioneer Hi-Bred | Johnston | 1926 |
| Playboy Enterprises | Los Angeles | 1953 |
| PlayStation Now | Aliso Viejo | novembro 2008 |
| PNC Financial Services | One PNC Plaza | 1982 |
| Polycom | São José | 1990 |
| Pony Express | — | 1860 |
| Precision Manuals Development Group | Alexandria | 1997 |
| Procter & Gamble | Ohio, Cincinnati | 31 de outubro de 1837 |
| Providence Equity Partners | 50 Kennedy Plaza | 1989 |
| Prudential Financial | Prudential Headquarters | 1875 |
| Qlik | King of Prussia | 1993 |