| A-Consult Agro A/S | 7800 | Skive |
| A/S Fredericia Tankvognsudstyr ( A/S FTU ) | 7000 | Fredericia |
| A/S Gunnar Haagensen | 3450 | Allerød |
| A/S Løgstrup Steel | 3490 | Kvistgård |
| A/S Oilpower Hydraulics | 6700 | Esbjerg |
| A/S Secure | 3520 | Farum |
| AAG | Aalborg Gummivarefabrik A/S | 9400 | Nørresundby |
| Aalborg CSP A/S | 9000 | Aalborg |
| Aarhus Havn | 8000 | Århus C |
| AB Inventech A/S | 7430 | Ikast |
| ABB A/S | 2750 | Ballerup |
| ABCliner - ABC rørteknik ApS | 7080 | Børkop |
| ACTEC A/S | 8940 | Randers SV |
| Adding Engineering A/S | 9000 | Aalborg |
| Ahlsell Danmark | 2625 | Vallensbæk |
| Aircold Køleanlæg | 9210 | Aalborg SØ |
| Akkodis Edge Denmark A/S | 2730 | Herlev |
| Aktive Energi Anlæg A/S | 7400 | Herning |
| Albjerg's Maskintec A/S | 5771 | Stenstrup |
| Alcadon ApS | 2990 | Nivå |
| ALPHA Containers A/S | 8000 | Aarhus C |
| Annoncørbetalt indhold | 9220 | Aalborg Ø |
| ARI-Armaturen A/S | 7000 | Fredericia |
| Arm-Tec Steelsupport A/S | 5792 | Årslev |
| Armatec A/S | 2600 | Glostrup |
| AS SCAN | 6960 | Hvide Sande |
| Askalon, Filial af Askalon AB | 2860 | Søborg |
| AVK Danmark A/S | 8464 | Galten |
| AVN Gruppen | 2605 | Brøndby |