| Adnovum | |
| Adolf Kühner AG | |
| Adoram Therapeutics | |
| ADS Electronic Dillinger | Zurich |
| Advance Metrics AG | |
| Advanced Bionics AG | |
| Advanced Power AG | |
| Advanced Silicon S.A. | Vaud |
| Advanced Solutions Consulting GmbH | Aargau |
| Advantix Groupware AG | Zurich |
| AdvantX | Bern |
| Advellence Solutions AG | Zurich |
| Advertima Vision AG | |
| ADVICE Informatik AG | St. Gallen |
| Aeler Technologies S.A. | |
| Aesyra S.A. | |
| Aeximius S.A. | |
| Affentranger Associates S.A. | |
| AG für Daten-Communication | Zurich |
| Agence 25 | |
| Aginko Research AG | |
| AGIS | Appenzell Ausserrhoden |
| Agora Care S.A. | |
| Agri & Co Challenge | |
| Agro-Office AG | Zurich |
| AHo Software | Zurich |
| AI FLow | |
| ai LaMo | |
| Aica S.A. | |
| AICOS Technologies AG | Basel-Landschaft |
| AIcrowd Ltd | |
| Aiflow | |
| Aigon | Geneva |
| Aisberg GmbH | Thurgau |
| Aisot Technologies AG | |
| Ajuna | |
| Akademie der Naturwissenschaften Schweiz | |
| Akadia AG | Bern |
| Akenza AG | |
| Akina AG | |
| Akselos S.A. | |
| AKTA Elektronik AG | Zug |
| Aktiia S.A. | |
| Alabus AG | Zurich |
| Aladin.net | Valais |
| Albatross AI AG | |
| ALCOM Electronics AG | Schwyz |
| Alcon | |
| Aldente Brainworks GmbH | Zurich |
| Aleno | Zurich |