| The Behemoth | San Diego | 2003 |
| The Boring Company | Hawthorne | 17 de dezembro de 2016 |
| The Earth Institute | Nova Iorque | 1995 |
| The Hartford | Hartford, Connecticut | 1810 |
| The Hoover Company | North Canton | 1908 |
| The J.M. Smucker Company | Orrville | 1897 |
| The Kennedy/Marshall Company | Santa Mônica | 1992 |
| The McClatchy Company | Sacramento | 1857 |
| The Muppets Studio | Los Angeles | 2004 |
| The New York Times Company | New York Times Building, Nova Iorque | 18 de setembro de 1851 |
| The Onion | Chicago | 1988 |
| The Orchard | Nova Iorque | 1997 |
| The Travelers Companies | Nova Iorque | 1853 |
| The Viper Room | Califórnia | 1993 |
| The Walt Disney Company | Burbank | 16 de outubro de 1923 |
| Thomas Motor Company | Buffalo | 1902 |
| THX | São Rafael | 1983 |
| TIAA | Nova Iorque | 1918 |
| TIBCO Software | Palo Alto | 1997 |
| Tiger of Sweden | Estocolmo | 1903 |
| Time Inc. | Nova Iorque | 28 de novembro de 1922 |
| Timex | Middlebury, Estados Unidos | 1854 |
| TiVo Corporation | Santa Clara, São José | 1983 |
| TJX Companies | Framingham | 1956 |
| Todd-AO | Hollywood | 1953 |
| TopCoder | São Francisco | 2001 |
| Toro | Bloomington | 1914 |
| Tower Records | Sacramento | 1960 |
| Transmeta | Santa Clara | 1995 |
| Trek Bicycle Corporation | Waterloo | 1976 |
| Trident Microsystems | Santa Clara | 1987 |
| Trimark Pictures | Santa Mônica | 1985 |
| Trinity Broadcasting Network | Costa Mesa | 1973 |
| Trump Entertainment Resorts | Hard Rock Hotel & Casino Atlantic City | 1995 |
| Trump Steaks | Nova Iorque | 8 de maio de 2007 |
| Tseng Labs | Pensilvânia | 1983 |
| TUMI | Edison | 1975 |
| Turnitin | Oakland | 1997 |
| Twilio | São Francisco | 2008 |
| Two Steps From Hell | Los Angeles | 2006 |
| Uber | São Francisco | março 2009 |
| Ubiquiti | Nova Iorque | outubro 2003 |
| Ultimate Ears | Irvine | 1995 |
| Ultimate Pro Wrestling | Califórnia | 1998 |
| Union Carbide | Danbury | 1957 |
| Union Iron Works | São Francisco | 1849 |
| Unisys | Blue Bell | 1987 |
| United Fruit Company | Fort Lauderdale, Étoy | 30 de março de 1899 |