| Ameriprise Financial | Minneapolis | 1894 |
| Amgen | Thousand Oaks | 1980 |
| Amlogic | Santa Clara | 1995 |
| Amphenol | Wallingford Center | 1932 |
| Anadarko Petroleum | The Woodlands | 1959 |
| Anchor Brewing Company | São Francisco | 1896 |
| Anduril Industries | Califórnia | 2017 |
| Anheuser-Busch | St. Louis | 1852 |
| Aniplex of America | Santa Mônica | 2005 |
| Ansys Inc. | Canonsburg | 1970 |
| Apollo Global Management | Solow Building | 1990 |
| Apple Inc. | Cupertino | 1 de abril de 1976 |
| Applied Materials | Santa Clara | 1967 |
| Arby's | Sandy Springs | 1964 |
| Archie Comics | Nova Iorque, Pelham | 1939 |
| ARCO | Los Angeles | 1966 |
| Arista Networks | Santa Clara | outubro 2004 |
| Ashton-Tate | Torrance | agosto 1980 |
| ASTM | West Conshohocken | 1961 |
| Astrobotic Technology | Pittsburgh | novembro 2007 |
| Atari Corporation | Sunnyvale | 2 de julho de 1984 |
| AtK Thiokol | Trenton, Brigham City | 1929 |
| Auntie Anne's | Lancaster U.S. Post Office building | 1988 |
| Autocar Company | Hagerstown | 1897 |
| Automatic Data Processing | Roseland | 1949 |
| AutoNation | Fort Lauderdale | 1996 |
| Avatar Press | Rantoul | 1996 |
| Avid | Burlington | 1987 |
| Avis Budget Group | Parsippany-Troy Hills | 2006 |
| Axalta Coating Systems | Filadélfia | 1866 |
| Bad Dragon | Phoenix | junho 2008 |
| Baker Hughes | Houston | 1987 |
| Baker Motor Vehicle | Cleveland | 1899 |
| Banana Republic | São Francisco | 1978 |
| Bank of America | Charlotte | 1784 |
| Bank of America Home Loans | Charlotte | 2009 |
| Barrett Firearms Manufacturing | Christiana | 1982 |
| Baskin-Robbins | Canton | 1945 |
| Bausch & Lomb | Vaughan, Rochester | 1853 |
| BBVA Argentina | Buenos Aires | 1996 |
| BEA Systems | São José | 1995 |
| Beats Electronics | Culver City | 2006 |
| Beckman Coulter | Krefeld, Brea | 1935 |
| Bed Bath & Beyond, Inc. | Midvale | 2023 |
| Belden | St. Louis | 1902 |
| Bell & Howell | Wheeling | 1907 |
| Bell Telephone Company | — | 9 de julho de 1877 |
| Benchmark | Menlo Park | 1995 |