| AP Pension | |
| Apento ApS | |
| Apex Virtual Entertainment ApS | |
| Applicators ApS | |
| Apport Systems A/S | |
| Approxima A/S | |
| APPS People | |
| Appsbuyout | |
| Appsin ApS | |
| Appstract Consulting ApS | Capital Region of Denmark |
| Appvestor ApS | |
| Aps Data-know-how | |
| Arbejdernes Landsbank | Capital Region of Denmark |
| Arcedi Biotech ApS | |
| Archii ApS | Capital Region of Denmark |
| Arenalogic ApS | Region Zealand |
| Arosii A/S | Central Denmark Region |
| Art of Web | |
| Artboost | |
| Artco | Central Denmark Region |
| Artcoustic USA | Capital Region of Denmark |
| Artventure | |
| Artwork Systems Nordic A/S | |
| Aryze (BVI) Ltd | |
| ASA Software ApS | |
| ASA Software ApS | |
| Ascendis Pharma A/S | |
| Ascio | Capital Region of Denmark |
| Asento ApS | |
| Asetek A/S | |
| AskCody | |
| ASMdata | Capital Region of Denmark |
| aspnethotel.dk | North Jutland Region |
| Assist Danmark | Capital Region of Denmark |
| Astralis | |
| Astro.io ApS | |
| AT-Orbital ApS | Central Denmark Region |
| ATAK Advertising & Marketing ApS | Capital Region of Denmark |
| ATC Data ApS | Region Zealand |
| Atea A/S | Capital Region of Denmark |
| Atenzo Digital A/S | |
| Ateo | |
| ATIVE | Capital Region of Denmark |
| ATMOS | Capital Region of Denmark |
| AtomGraph | Capital Region of Denmark |
| ATRIUM Partners A/S | |
| Attech Computer ApS | Central Denmark Region |
| Attention Solutions ApS | Capital Region of Denmark |
| ATZnet | Region of Southern Denmark |
| Audio-Visuelt Centrum A/S | Central Denmark Region |