| Amber Implants B.V. | |
| Amberscript Global B.V. | |
| Ambrero Software B.V. | North Holland |
| Amcom B.V. | North Holland |
| Amdax | North Holland |
| America-Direct B.V. | South Holland |
| Amitron B.V. | South Holland |
| AMMP Technologies B.V. | |
| AMOLF | |
| Amphebia | South Holland |
| Amphera | |
| Ampleon | |
| Amrif | |
| Amstel Software | |
| Amsterdam Capital House | |
| Amsterdam Health & Technology Center | |
| Amsterdam Internet Exchange | North Holland |
| Amsterdam Smart City | North Holland |
| Amsterdam UMC | |
| Amsterdam University College | North Holland |
| Amsterdam University of Applied Sciences | North Holland |
| Amsterdam Venture Partners | North Holland |
| Amsterdam Venture Studios | North Holland |
| Amsterdams Instituut voor ArbeidsStudies | |
| Amsterdamse Hogeschool voor de Kunsten | |
| AMT Medical B.V. | |
| Amyyon Software | Groningen |
| AnalogFolk | |
| Anavo Therapeutics B.V. | |
| Anchormen | North Holland |
| Anders-IT | |
| Andes B.V. | North Brabant |
| André Breedvelt | |
| Angarde Groep B.V. | Utrecht |
| Angi Studio | South Holland |
| ANGOKA | |
| Angry Bytes | North Holland |
| AnL Hardware | South Holland |
| AnMass | South Holland |
| Anoxtech Holding B.V. | North Holland |
| Anshi Design | Flevoland |
| ANT Neuro | Overijssel |
| Antagonist | Overijssel |
| Anterra Capital | North Holland |
| Antum | |
| Anubis IT-Security | Gelderland |
| Any Screen Size B.V. | |
| AnyLinQ B.V. | Utrecht |
| AnywhereNow | South Holland |
| AnywhereNow | |