| A-Consult Agro A/S | 7800 | Skive |
| A-Supply A/S | 9990 | Skagen |
| A-Z-Trading | 6400 | Sønderborg |
| A/S J. Petersens Beslagfabrik | 9240 | Nibe |
| A/S Jensen Electric | 2665 | Vallensbæk Strand |
| A/S Julius Nielsen & Søn | 2610 | Rødovre |
| A/S Secure | 3520 | Farum |
| Aabling A/S | 7100 | Vejle |
| AAG | Aalborg Gummivarefabrik A/S | 9400 | Nørresundby |
| Aalborg Portland A/S | 9100 | Aalborg |
| Aalborg Recycling ApS | 9220 | Aalborg Øst |
| Aarhus Maskinmesterskole | 8000 | Aarhus C |
| AART architects | 8000 | Aarhus C |
| AB Byggeprofiler A/S | 9400 | Nørresundby |
| AB Electric A/S | 6000 | Kolding |
| ABB A/S | 2740 | Skovlunde |
| ABC Pavilloner A/S | 7442 | Engesvang |
| ABC rørteknik ApS | 7080 | Børkop |
| Abexa ApS | 8543 | Hornslet |
| ABV teknik A/S | 9500 | Hobro |
| ABVAC A/S | 3660 | Stenløse |
| Acies A/S | 8600 | Silkeborg |
| ACO Nordic A/S | 4100 | Ringsted |
| Acrimo A/S | 2640 | Hedehusene |
| ACTEC A/S | 8940 | Randers SV |
| Acuttek | 5500 | Middelfart |
| Adapteo | 2670 | Greve |
| Adserballe & Knudsen A/S | 3520 | Farum |
| AFRY | 7400 | Herning |
| Aircold Køleanlæg | 9210 | Aalborg SØ |
| Airheat A/S | 7500 | Holstebro |
| AirTjek ApS | 8300 | Odder |
| Ajcon Entreprenør- og Ingeniørfirma A/S | 7100 | Vejle |
| Ajos a/s | 7100 | Vejle |
| Ajour System a/s | 5250 | Odense SV |
| Akzo Nobel Industrial Coatings A/S | 7430 | Ikast |
| AkzoNobel Powder Coatings | 2730 | Herlev |
| Albe Emballage A/S | 2640 | Hedehusene |
| Alfix A/S | 6000 | Kolding |
| All Remove Danmark A/S | 2600 | Glostrup |
| ALPHA Containers A/S | 8000 | Aarhus C |
| Alsmatik A/S | 6400 | Sønderborg |
| Altiflex Danmark ApS | 2650 | Hvidovre |
| Altro Danmark | 200 39 | Malmö |
| Aluflam A/S | 4000 | Roskilde |
| Alumeco A/S | 5000 | Odense C |
| Alumentdk | 6000 | Kolding |
| Alux A/S | 8600 | Silkeborg |
| Ambercon A/S | 9530 | Støvring |
| AMCS Denmark A/S | 2400 | København NV |
| Amstrup Skilte ApS | 7000 | Fredericia |
| AMU-Vest | 6705 | Esbjerg Ø |
| ANKER HANSEN & CO. A/S | 3600 | Frederikssund |
| Annoncørbetalt indhold | 9220 | Aalborg Ø |
| Ans Trætørring A/S | 8643 | Ans By |
| Anton Knudsen Egtved A/S | 6040 | Egtved |
| Ap Facader Aluminium & Plast A/S | 9700 | Brønderslev |
| Ara-El ApS | 4690 | Haslev |
| Areco Profiles A/S | 9575 | Terndrup |
| ARKAS A/S | 8763 | Rask Mølle |
| arkitekterne BJØRK & MAIGÅRD ApS | 9000 | Aalborg |
| Armatec A/S | 2600 | Glostrup |
| Arne Elkjær A/S Rådgivende Ingeniører | 8210 | Aarhus V |
| Arnivara A/S | 2820 | Gentofte |
| ARO Energy Solutions A/S | 5000 | Odense C |
| Aros Maler Entreprise A/S | 8250 | Egå |
| ASP Produktudvikling A/S | 9240 | Nibe |
| ASSA ABLOY Entrance Systems | 9500 | Hobro |
| ASSA ABLOY Opening Solutions A/S | 2750 | Ballerup |
| ATKI A/S | 4700 | Næstved |
| Atradius | 2450 | København SV |
| Aubo Production A/S | 7490 | Aulum |
| Auktionshuset dab A/S | 8361 | Hasselager |
| Automatik | 7400 | Herning |
| AVANT Danmark | 8670 | Låsby |
| Avidenz A/S | 5250 | Odense SV |
| AVK Danmark A/S | 8464 | Galten |
| AVS Danmark ApS | 2640 | Hedehusene |
| AVS Vejsikring A/S | 4621 | Gadstrup |