| The Stone Quarry | Pasadena | 2004 |
| The Trump Organization | Trump Tower | 1923 |
| The Vanguard Group | Malvern | 1 de maio de 1975 |
| The Viper Room | Califórnia | 1993 |
| Thermo Fisher Scientific | Waltham | 2006 |
| Thomas Motor Company | Buffalo | 1902 |
| TIAA | Nova Iorque | 1918 |
| Tiffany & Co. | Nova Iorque | 1837 |
| Tiger Electronics | Vernon Hills | 1978 |
| Timberland | Stratham | 1952 |
| Time Inc. | Nova Iorque | 28 de novembro de 1922 |
| Timely Comics | Manhattan | 1939 |
| TiVo Corporation | Santa Clara, São José | 1983 |
| TJX Companies | Framingham | 1956 |
| TKO Group Holdings | Nova Iorque | 12 de setembro de 2023 |
| Todd-AO | Hollywood | 1953 |
| Toro | Bloomington | 1914 |
| Total Nonstop Action Wrestling | Nashville | 4 de janeiro de 2024 |
| Tractor Supply Company | Brentwood | 1938 |
| Trident Microsystems | Santa Clara | 1987 |
| Trimble | Westminster | 1978 |
| Tripadvisor | Needham | 14 de fevereiro de 2000 |
| Trumpet Records | — | 1951 |
| TUMI | Edison | 1975 |
| Turtle Beach Systems | Valhalla | 1975 |
| Two Steps From Hell | Los Angeles | 2006 |
| U.S. Bancorp | Minneapolis | 1850 |
| Uber | São Francisco | março 2009 |
| Ulta Beauty | Bolingbrook | 1990 |
| Ultimate Ears | Irvine | 1995 |
| Unimation | — | 1962 |
| Union Iron Works | São Francisco | 1849 |
| United Parcel Service | Sandy Springs | 28 de agosto de 1907 |
| United Press International | Washington, D.C. | 1907 |
| United States Postal Service | L'Enfant Plaza | 1 de julho de 1971 |
| United States Rubber Company | Naugatuck | 1892 |
| Unocal Corporation | Los Angeles | 1890 |
| URS Corporation | Transamerica Pyramid, São Francisco | 1951 |
| USRobotics | Schaumburg | 1976 |
| UUNET | Ashburn | 1987 |
| Valid | Stamford | 1795 |
| Vanguard Animation | West Hollywood | 2002 |
| Varian Medical Systems | Palo Alto | 1948 |
| Veeva Systems | Pleasanton | 2007 |
| Verifone | São José, Coral Springs | 1981 |
| Vertiv | Westerville | 1965 |
| VF Corporation | Denver, Greensboro | 1899 |
| Viagogo | Londres | 2006 |