| Amgen | Thousand Oaks | 1980 |
| Amkor Technology | Tempe | 1968 |
| Ancestry.com | Lehi | 1983 |
| Anheuser-Busch | St. Louis | 1852 |
| Ansys Inc. | Canonsburg | 1970 |
| Apollo Computer | Chelmsford | 1980 |
| Applied Materials | Santa Clara | 1967 |
| Arby's | Sandy Springs | 1964 |
| ARCO | Los Angeles | 1966 |
| ArenaNet | Bellevue | 2000 |
| Arista Networks | Santa Clara | outubro 2004 |
| Arrow Electronics | Englewood | 1935 |
| Ashland Inc. | Covington | 1924 |
| Ashton-Tate | Torrance | agosto 1980 |
| Associação Automobilística Americana | Heathrow | 1902 |
| ASTM | West Conshohocken | 1961 |
| Astrobotic Technology | Pittsburgh | novembro 2007 |
| AT&T | Dallas | 5 de outubro de 1983 |
| Avis Budget Group | Parsippany-Troy Hills | 2006 |
| Avnet | Phoenix | 1921 |
| Axios | condado de Arlington | 2017 |
| Bad Dragon | Phoenix | junho 2008 |
| Baker Motor Vehicle | Cleveland | 1899 |
| Baldwin Locomotive Works | Eddystone | 1825 |
| Baltimore and Ohio Railroad | Baltimore | 1827 |
| Bank of America | Charlotte | 1784 |
| Bank of America Merrill Lynch | Bank of America Tower | 2009 |
| Bank One Corporation | Chicago | 1863 |
| Barrett Firearms Manufacturing | Christiana | 1982 |
| Bath & Body Works, Inc. | Columbus | 1963 |
| Bauer Hockey | Exeter | 1927 |
| Bausch Health | Laval, Wilmington | 1960 |
| BBVA Argentina | Buenos Aires | 1996 |
| Be Incorporated | Menlo Park | 1990 |
| BEA Systems | São José | 1995 |
| Beatport | — | 2004 |
| Bechtel | Reston | 1906 |
| Beckman Coulter | Krefeld, Brea | 1935 |
| Bed Bath & Beyond, Inc. | Midvale | 2023 |
| Belden | St. Louis | 1902 |
| Bell Telephone Company | — | 9 de julho de 1877 |
| Bellator MMA | Newport Beach | 2008 |
| Ben & Jerry's | South Burlington | 1978 |
| Berkeley Software Design | — | 1991 |
| Best Buy | Richfield | 22 de agosto de 1966 |
| Bethlehem Steel | Bethlehem | 1857 |
| Beyond Meat | El Segundo | 2009 |
| Bicycle Playing Cards | Erlanger | — |