| Waltham Watch Company | Waltham, Amsterdã | 1850 |
| Warner Bros. Cartoons | Burbank, Los Angeles | 10 de novembro de 1926 |
| Warner Bros. Records Inc. | Nova Iorque | 19 de março de 1958 |
| Warrior Sports | Warren | 1992 |
| Waterman | Paris | 1883 |
| Waters Corporation | Milford | 1958 |
| Weatherby, Inc. | Sheridan, El Paso de Robles | 1945 |
| Webster Bank | Stamford | 1935 |
| Weitek | São José | 1981 |
| Welch's | Concord | 1869 |
| West Coast Customs | Burbank | 1994 |
| Western Design Center | Mesa | 1978 |
| Western Digital | São José | 23 de abril de 1970 |
| Western Pacific Railroad | São Francisco | 1916 |
| Western Union | Denver | abril 1856 |
| Westinghouse Electric Company | Cranberry Township | 1999 |
| WeWork | Manhattan, Nova Iorque | 2010 |
| Weyerhaeuser | Seattle, Federal Way | 1900 |
| White Motor Company | Cleveland | 1902 |
| WHOOP | Boston | — |
| Wikipédia:Página de testes/2 | Norwood | 1965 |
| William Morris Endeavor | Beverly Hills | 1898 |
| Willys Overland | Toledo | 1908 |
| Wilson Sporting Goods | Chicago | 1913 |
| Winchester Repeating Arms Company | New Haven | 1866 |
| Wingstop | Dallas | 1994 |
| Winton Motor Carriage Company | Cleveland | 1897 |
| Wizards of the Coast | Renton | 1990 |
| Woot | Carrollton | 2004 |
| WordPress.com | São Francisco | 2005 |
| Workday Inc. | Pleasanton | março 2005 |
| Workhorse Group | Cincinnati, Sharonville | 1998 |
| World Wrestling Council | Porto Rico | 1973 |
| Wrigley | Chicago | 1 de abril de 1891 |
| Wrike | Mountain View | 2006 |
| Wyndham Hotels & Resorts | Parsippany-Troy Hills | 1 de junho de 2018 |
| Xamarin | São Francisco | maio 2011 |
| Xerox | Norwalk | 18 de abril de 1906 |
| Xilinx | São José | 1984 |
| Y Combinator | Mountain View | março 2005 |
| Zello | Nova Iorque, Austin | — |
| Zendesk | São Francisco | 2007 |
| Zillow | Seattle | 2006 |
| Zoox | Foster City | 2014 |
| Zuffa | Las Vegas | 2001 |