| Alphazyme | Florida |
| Alphazyme, LLC | |
| Alpheus Medical, Inc. | Minnesota |
| Alphyn Biologics, Inc. | Maryland |
| Alpine Bank | |
| Alpine Clinical Research Center | Colorado |
| Alpine Credit Union | |
| Alpine Electronics | California |
| Alpine Electronics of America, Inc. | California |
| Alpine Immune Sciences | Washington |
| Alpine Investors | California |
| Alpine Power Systems | Michigan |
| Alpine Software | Oregon |
| Alpine Technology Group | Colorado |
| Alpine Web Media | Vermont |
| Alpine.io | Oregon |
| AlpineWeb Design | New Hampshire |
| ALPS Technology, Inc. | California |
| ALR Systems & Software, Inc. | Nebraska |
| AlsoEnergy, Inc. | Colorado |
| Alsoft, Inc. | Texas |
| Alsop Louie Partners | California |
| ALSP, Inc. | California |
| ALSTEM, Inc. | |
| Alt Ethos Ltd | Colorado |
| Alt Legal, Inc. | |
| Alt-Options, LLC | Massachusetts |
| Alta Associates | New Jersey |
| Alta Biomaterials | California |
| Alta Vista Technology, LLC | Michigan |
| Alta Web Works | Washington |
| Altabank | |
| Altaeros | |
| AltaGrade, LLC | Washington |
| Altair Engineering, Inc. | Michigan |
| Altair Engineering, Inc. | |
| Altamaha Bank & Trust | |
| Altamaha Bank & Trust | |
| Altamaha Federal Credit Union | |
| Altametrics | California |
| Altamira | Virginia |
| Altana AI | New York |
| Altana Federal Credit Union | |
| Altanova, LLC | New York |
| AltaOne Federal Credit Union | |
| AltaPoint | Utah |
| Altara | California |
| Altaris, LLC | |
| Altarum | |
| AltaThera Pharmaceuticals, LLC | |