| A.K.S. Gruppen A/S | 2650 | Hvidovre |
| A.K.S. Montronics A/S | 2650 | Hvidovre |
| A/S Dybvad Stålindustri | 9352 | Dybvad |
| A/S Jensen Electric | 2665 | Vallensbæk Strand |
| A/S Kurt Hansen | 5700 | Svendborg |
| A/S Secure | 3520 | Farum |
| AB Inventech A/S | 7430 | Ikast |
| ACTEC A/S | 8940 | Randers SV |
| Albe Emballage A/S | 2640 | Hedehusene |
| Alcumatic A/S | 6400 | Sønderborg |
| Alsmatik A/S | 6400 | Sønderborg |
| Altoo Measurement Science Aps | 2970 | Hørsholm |
| Amatek Skilte ApS | 7000 | Fredericia |
| AN Group A/S | 3540 | Lynge |
| Annoncørbetalt indhold | 9220 | Aalborg Ø |
| Ara-El ApS | 4690 | Haslev |
| Atradius | 2450 | København SV |
| Automatik | 7400 | Herning |
| Aventia Energy ApS | 9000 | Aalborg |
| Avnet Abacus | 8653 | Them |
| Avnet Embedded | 2730 | Herlev |
| Avnet Silica | 2730 | Herlev |
| AVS Danmark ApS | 2640 | Hedehusene |
| AWILCO ApS | 4623 | Ll. Skensved |