| Appway AG | Zurich |
| APR Applied Pharma Research S.A. | |
| Apsis GmbH | Zurich |
| Aptasic S.A. | |
| aQ Engineering GmbH | St. Gallen |
| Aquarius Water Group | |
| Arab Bank Switzerland | |
| Aragon | |
| Araris Biotech AG | |
| Aravis S.A. | Zurich |
| Arcade Solutions AG | Lucerne |
| Arcantel S.A. | Neuchâtel |
| Archilogic AG | |
| Archimede Solutions S.A.R.L. | |
| Archlet AG | |
| Arcium | |
| Arcmedia AG | Lucerne |
| Arcoscreen S.A. | |
| Arena Ventures AG | |
| ARF Financial GmbH | |
| Argá Medtech S.A. | |
| Argus Data Insights Schweiz AG | |
| ArgYou AG | Zug |
| Ariacom | Geneva |
| Ark Linux | Zurich |
| Arktis Radiation Detectors Ltd | |
| ArluText | Bern |
| Armanisoft | Lucerne |
| ARP Schweiz AG | Zug |
| Art & Media GmbH | Zurich |
| Artamedia.net | Valais |
| artd webdesign GmbH | Bern |
| Artidis AG | |
| Artiria Medical S.A. | |
| Artmotion AG | Zug |
| Artwin AG | Aargau |
| Arvelle Therapeutics | Zug |
| Arviem AG | |
| Ascaion | Zurich |
| Asceneuron S.A. | |
| Asceneuron S.A. | |
| Ascensia Diabetes Care Holdings AG | |
| Ascentiv AG | Zurich |
| Ascento Robotics | Zurich |
| Ascom Holding AG | Bern |
| AsedSciences AG | |
| Asetronics AG | Bern |
| ASI Advanced Sport Instruments | |
| Asic Robotics AG | Bern |
| Asmallworld AG | |