| Title | Website | City | State | Founded Year |
|---|---|---|---|---|
| 21cconsultancy.com | London | — | — | |
| 23andme.com | Sunnyvale | CA | — | |
| twobtech.com | Boulder | CO | — | |
| 3cisd.com | Cary | NC | — | |
| 3dgsinc.com | Albuquerque | NM | — | |
| — | Raleigh | — | — | |
| 3m.com | Saint Paul | — | — | |
| 480biomedical.com | Watertown | MA | — | |
| 490biotech.com | Knoxville | TN | — | |
| aswatson.com | Renswoude | — | — | |
| braider.com | Cincinnati | OH | — | |
| new.abb.com | Cary | NC | — | |
| abbott.ca | Montreal | — | — | |
| abbott.co.uk | Maidenhead | — | — | |
| abbott.com | Chicago | IL | — | |
| abbvie.com | North Chicago | IL | — | |
| abiomed.com | Danvers | — | — | |
| ablynx.com | Ghent | — | — | |
| abqmr.com | Albuquerque | NM | — | |
| absconsulting.com | Houston | TX | — |