| Stellantis North America | Chrysler Headquarters and Technology Center | April 28, 2009 |
| Strategic Simulations | Sunnyvale | 1979 |
| Substack | — | November 29, 2017 |
| Supreme | New York City | April 1994 |
| SureFire | Fountain Valley | 1979 |
| Swift Engineering | San Clemente | 1983 |
| Sylvania Electric Products | — | 1942 |
| T. Rowe Price | Baltimore | 1937 |
| TD Ameritrade | Omaha | 1971 |
| Tesoro Corporation | — | 1968 |
| The Bank of New York Mellon | New York City | 2007 |
| The Cigna Group | Bloomfield | 1982 |
| The Hershey Company | Hershey | 1894 |
| The Hertz Corporation | Estero | 1918 |
| The NPD Group | Port Washington | 1967 |
| The Travelers Companies | New York City | 1853 |
| Theranos | Palo Alto | 2003 |
| Thermo Fisher Scientific Inc. | Waltham | 2006 |
| Tibco Software | Palo Alto | 1997 |
| Time Inc. | New York City | November 28, 1922 |
| Time Warner Cable | New York City | 1989 |
| Tommy Hilfiger B.V. | New York City, Amsterdam | 1985 |
| Toro | Bloomington | 1914 |
| Total Nonstop Action Wrestling | Nashville | January 4, 2024 |
| Trimble | Westminster | 1978 |
| Tripadvisor | Needham | February 14, 2000 |
| Turner Broadcasting System | CNN Center | 1970 |
| Two Steps from Hell | Los Angeles | 2006 |
| U.S. Cellular | Chicago | 1983 |
| Uber | San Francisco | March 2009 |
| Ubiquiti | New York City | October 2003 |
| Under Armour | Baltimore | 1996 |
| United Airlines Holdings | Chicago | December 30, 1968 |
| United Space Alliance | Houston | August 1995 |
| United Technologies Corporation | Hartford | 1929 |
| USRobotics | Schaumburg | 1976 |
| Vertiv | Westerville | 1965 |
| Viacom | One Astor Plaza | December 31, 2005 |
| Village Roadshow Pictures | Los Angeles | 1986 |
| Visteon | Van Buren Charter Township | 2000 |
| Warner Bros. Discovery | New York City | April 8, 2022 |
| Warrior Sports | Warren | 1992 |
| Waters Corporation | Milford | 1958 |
| Western Electric | New York City | 1869 |
| Westinghouse Electric Company | Cranberry Township | 1999 |
| Weyerhaeuser | Seattle, Federal Way | 1900 |
| Whole Foods Market | Austin | September 20, 1980 |
| Wildfire Games | United States | 2002 |