| A. T. Cross Company | Lincoln | 1846 |
| Abercrombie & Fitch | New Albany | 1892 |
| AbioMed | Danvers | 1981 |
| Adobe | San Jose | February 28, 1982 |
| Advance Auto Parts | Roanoke | 1932 |
| Aetna | Hartford | 1853 |
| Agilent Technologies | Santa Clara | 1999 |
| Airbnb | San Francisco | 2008 |
| Albemarle Corporation | Baton Rouge | 1994 |
| Albertsons | Boise | 1939 |
| Allen-Bradley | Milwaukee | 1903 |
| AllianceBernstein | Nashville | 1967 |
| Alliant Techsystems | Arlington County | 1990 |
| Allstate | Northbrook | April 17, 1931 |
| Ally Financial | Detroit, New York City | 1919 |
| Alpha Tomo Global Resoures Sdn Bhd | Milwaukee | 1948 |
| AMC Global Media | New York City | 1980 |
| Ameren | St. Louis | 1997 |
| American Airlines | Fort Worth | April 15, 1926 |
| American Eagle Outfitters | Pittsburgh | 1977 |
| Ametek | Berwyn | 1930 |
| Amgen | Thousand Oaks | 1980 |
| Amkor Technology | Tempe | 1968 |
| Analog Devices | Norwood | 1965 |
| Apollo Group | Phoenix | 1973 |
| Apple Inc. | Cupertino | April 1, 1976 |
| Applied Materials | Santa Clara | 1967 |
| Aramark | Philadelphia | 1959 |
| Ashland Inc. | Covington | 1924 |
| Automatic Data Processing | Roseland | 1949 |
| AutoNation | Fort Lauderdale | 1996 |
| AutoZone | Memphis | 1979 |
| Avery Dennison | Glendale | 1935 |
| Avis Budget Group | Parsippany-Troy Hills | 2006 |
| Avnet | Phoenix | 1921 |
| Avon Products Inc. | New York City | 1886 |
| Babcock & Wilcox | Charlotte, United States, New York City | 1867 |
| Baker Hughes | Houston | 1987 |
| Bausch & Lomb | Vaughan, Rochester | 1853 |
| BEA Systems | San Jose | 1995 |
| Bed Bath & Beyond Inc. | Wilmington | 1971 |
| Biogen | Cambridge | 1978 |
| Blackboard | Washington, D.C. | 1997 |
| Boeing | Chicago | 1934 |
| Booking Holdings | Norwalk | July 1997 |
| Booz Allen Hamilton | Tysons | 1914 |
| BorgWarner | Auburn Hills | 1880 |
| Boston Beer Company | Boston | 1985 |