| 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. | |
| Affentranger Associates S.A. | |
| AG für Daten-Communication | Zurich |
| Aginko Research AG | |
| AGIS | Appenzell Ausserrhoden |
| Agora Care S.A. | |
| Agri & Co Challenge | |
| Agro-Office AG | Zurich |
| AHo Software | Zurich |
| Aica S.A. | |
| AICOS Technologies AG | Basel-Landschaft |
| AIcrowd Ltd | |
| Aiflow | |
| Aigon | Geneva |
| Aisberg GmbH | Thurgau |
| Aisot Technologies AG | |
| Ajuna | |
| Akadia AG | Bern |
| Akina AG | |
| Akselos S.A. | |
| Akselos S.A. | |
| AKTA Elektronik AG | Zug |
| Aktiia S.A. | |
| Alabus AG | Zurich |
| Aladin.net | Valais |
| ALCOM Electronics AG | Schwyz |
| Alcon | |
| Aldente Brainworks GmbH | Zurich |
| Aleno | Zurich |
| Alentis Therapeutics AG | |
| Aleph Zero Foundation | |
| Aleva Neurotherapeutics | Vaud |
| Alithea Genomics | |
| AliveDx | |
| All Consulting AG | St. Gallen |
| Allgeier (Schweiz) AG | Zurich |
| AlloPC | Valais |
| Alltron AG | |
| Alpana Ventures | |
| Alpex Pharma S.A. | |
| Alpha&randj.net | Vaud |
| Alphanet | Neuchâtel |
| AlpHosting | Neuchâtel |
| Alpian S.A. | |