| 3D Systems | Rock Hill | 1986 |
| 3M | Maplewood | 1902 |
| AbbVie | North Chicago | April 10, 2012 |
| Abercrombie & Fitch | New Albany | 1892 |
| AbioMed | Danvers | 1981 |
| Acxiom | Wilmington, Conway | 2018 |
| Advance Auto Parts | Roanoke | 1932 |
| Aflac | Columbus | 1955 |
| Airbnb | San Francisco | 2008 |
| Akamai Technologies | Cambridge, Massachusetts | 1998 |
| Albertsons | Boise | 1939 |
| Alexion Pharmaceuticals | Cheshire | 1992 |
| AllianceBernstein | Nashville | 1967 |
| Altair Engineering | Troy | 1985 |
| Altria | Richmond | 1985 |
| Amazon | Seattle | July 5, 1994 |
| Ameren | St. Louis | 1997 |
| American Axle | Detroit | 1994 |
| American Electric Power | Columbus, Jersey City | August 1927 |
| American Express | New York City | 1850 |
| American International Group | New York City | 1919 |
| Ametek | Berwyn | 1930 |
| Amgen | Thousand Oaks | 1980 |
| Amkor Technology | Tempe | 1968 |
| Amplifon | Milan | 1950 |
| Analog Devices | Norwood | 1965 |
| Apollo Group | Phoenix | 1973 |
| Arista Networks | Santa Clara | October 2004 |
| Arthur J. Gallagher & Co. | Itasca | 1927 |
| Ashland Inc. | Covington | 1924 |
| ASICS | Kobe | 1949 |
| AutoZone | Memphis | 1979 |
| Avery Dennison | Glendale | 1935 |
| Avis Budget Group | Parsippany-Troy Hills | 2006 |
| Aéropostale | New York City | 1973 |
| Babcock & Wilcox | Charlotte, United States, New York City | 1867 |
| Ball Corporation | Broomfield | 1880 |
| Bausch Health | Laval, Wilmington | 1960 |
| BEA Systems | San Jose | 1995 |
| Bed Bath & Beyond Inc. | Wilmington | 1971 |
| Belden Incorporated | St. Louis | 1902 |
| Bentley Systems | Exton | 1984 |
| Best Buy | Richfield | August 22, 1966 |
| Blackboard | Washington, D.C. | 1997 |
| Block, Inc. | San Francisco | February 2009 |
| Boeing | Chicago | 1934 |
| Bojangles' Famous Chicken 'n Biscuits | Charlotte | 1977 |
| Booking Holdings | Norwalk | July 1997 |