| WebEx | Milpitas | 1995 |
| Weitek | São José | 1981 |
| Wells Fargo | São Francisco | 18 de março de 1852 |
| Western Design Center | Mesa | 1978 |
| Western Digital | São José | 23 de abril de 1970 |
| Western Electric | Nova Iorque | 1869 |
| Western Pacific Railroad | São Francisco | 1916 |
| Western Union | Denver | abril 1856 |
| Westinghouse Electric Company | Cranberry Township | 1999 |
| Westwood Studios | Las Vegas | 1992 |
| Weyerhaeuser | Seattle, Federal Way | 1900 |
| WHOOP | Boston | — |
| Williams International | Commerce Township | 1954 |
| Wilson Sporting Goods | Chicago | 1913 |
| Winchester Repeating Arms Company | New Haven | 1866 |
| Winnebago Industries | Eden Prairie | 12 de fevereiro de 1958 |
| Witricity | Watertown | 2007 |
| Woolworth | Nova Iorque | 1878 |
| WordPress.com | São Francisco | 2005 |
| Workday Inc. | Pleasanton | março 2005 |
| Workhorse Group | Cincinnati, Sharonville | 1998 |
| World Championship Wrestling | Atlanta | 11 de outubro de 1988 |
| World Series of Fighting | Las Vegas Valley | 2012 |
| World Wrestling Council | Porto Rico | 1973 |
| Wrangler | Greensboro | 1904 |
| Wright | Nova Iorque | 22 de novembro de 1909 |
| WSP Global | Montreal | 1959 |
| WWE Performance Center | Orlando | 11 de julho de 2013 |
| Wyndham Hotels & Resorts | Parsippany-Troy Hills | 1 de junho de 2018 |
| X Corp. | Bastrop | 9 de março de 2023 |
| Xamarin | São Francisco | maio 2011 |
| XCOR Aerospace | Mojave Air & Space Port | setembro 1999 |
| Xerox | Norwalk | 18 de abril de 1906 |
| Xerox PARC | Palo Alto | 1970 |
| Xfinity | Filadélfia | 2 de abril de 1981 |
| XFX | Ontario | 1989 |
| Yahoo | Sunnyvale, Nova Iorque | 2006 |
| Yen Press | Nova Iorque | 2006 |
| Zebra Technologies | Lincolnshire | 1969 |
| Zenith Electronics | — | 1918 |
| Zillow | Seattle | 2006 |
| Zilog | São José | 1974 |
| Zipline International | Half Moon Bay | 2011 |
| Zoran Corporation | Sunnyvale | 1983 |
| Zscaler | São José | 2008 |
| Água Fiji | Los Angeles | 1996 |