| EagleBurgmann KE A/S | 6600 | Vejen |
| Eaton | 2860 | Søborg |
| EBI A/S | 2610 | Rødovre |
| EFSEN UV & EB TECHNOLOGY (Efsen Engineering A/S) | 2840 | Holte |
| Ege-Elektronik Specialsensorer ApS | 6200 | Aabenraa |
| Elektro Gruppen A/S | 9700 | Brønderslev |
| Elektronikmessen E-24 | 5220 | Odense SØ |
| Elektror Airsystems ApS | 3320 | Skævinge |
| EMD International A/S | 9220 | Aalborg Øst |
| ENABL A/S | 8722 | Hedensted |
| Endress+Hauser A/S | 2860 | Søborg |
| Ensinger Danmark | 4100 | Ringsted |
| Entreprenørfirmaet Nordkysten A/S | 3250 | Gilleleje |
| Erhvervshus Nord | 9900 | Frederikshavn |
| Euro Therm A/S | 8220 | Brabrand |
| Exodraft Energy | 7100 | Vejle |
| Expandit Mobile ApS | 8520 | Lystrup |
| EXPO-NET Danmark A/S | 9800 | Hjørring |
| Exposervice ApS | 3460 | Birkerød |