| Asianet Pacific (S) Pte Ltd | Singapore |
| AsiaPac Distribution Pte Ltd | Singapore |
| AsiaPac Technology Pte Ltd | Singapore |
| Asiapay Payment Technology Pte Ltd | Singapore |
| ASJ Holdings Ltd | Singapore |
| Askvisor, LLP | Singapore |
| ASMPT | Singapore |
| Aspire Designs | Singapore |
| Aspire FT Pte Ltd | Singapore |
| Asprit Solutions | Singapore |
| Assemblr Pte Ltd | |
| Association for Medical and Bio-Informatics, Singapore | Singapore |
| Association of Electronic Industries in Singapore | Singapore |
| Association of Information Security Professionals | Singapore |
| Association of Telecommunications Industry of Singapore | Singapore |
| Assure IT Pte Ltd | Singapore |
| Asterisk Computer (FE) Pte Ltd | Singapore |
| Atato | Singapore |
| Athena Dynamics Pte Ltd | Singapore |
| Atlan Pte Ltd | Singapore |
| Atlas Data Network | Singapore |
| Atlas Rosetta Pte Ltd | |
| Atomionics Pte Ltd | |
| Attila Cybertech Pte Ltd | Singapore |
| Attonics Systems Pte Ltd | Singapore |
| Audio Note Singapore | Singapore |
| Augmentus Pte Ltd | Singapore |
| August One Pte Ltd | Singapore |
| Auk Industries | Singapore |
| AUM Biosciences | Singapore |
| Aura Group (Singapore) Pte Ltd | |
| Auristone | |
| Auston Institute of Management Pte Ltd | |
| Austrianova Biotechnology | Singapore |
| Autodesk Singapore | Singapore |
| Automation and Computer Engineering Pte Ltd | Singapore |
| Automation Support Services | Singapore |
| Automera | |
| Autopack Pte Ltd | Singapore |
| Autostar Technology | Singapore |
| AV One Group | Singapore |
| Ava Advisory Pte Ltd | Singapore |
| Avatamed | Singapore |
| Avelogic Pte Ltd | Singapore |
| Avensys Consulting Pte Ltd | Singapore |
| Aventis Graduate School | Singapore |
| Avetics | |
| Avi-Tech Electronics (S) Pte Ltd | Singapore |
| AVPN Global Conference | Singapore |
| Awebstar Technologies Pte Ltd | Singapore |