| Navn | Postnummer | By |
|---|---|---|
| A/S Jensen Electric | 2665 | Vallensbæk Strand |
| A/S Secure | 3520 | Farum |
| AB Inventech A/S | 7430 | Ikast |
| ACTEC A/S | 8940 | Randers SV |
| Airtec A/S | 7620 | Lemvig |
| Akkodis Edge Denmark A/S | 2730 | Herlev |
| Alcadon ApS | 2990 | Nivå |
| Alcumatic A/S | 6400 | Sønderborg |
| Annoncørbetalt indhold | 9220 | Aalborg Ø |
| Artlinco A/S | 8700 | Horsens |
| AWILCO | 4623 | Ll. Skensved |
| A/S Kurt Hansen | 5700 | Svendborg |