| E-20 | 5220 | Odense SØ |
| E.S. Stålindustri | 7480 | VILDBJERG |
| Eaton | 2860 | Søborg |
| Eegholm A/S | 6400 | Sønderborg |
| EFSEN UV & EB TECHNOLOGY (Efsen Engineering A/S) | 2840 | Holte |
| Eilersen Electric Digital Systems A/S | 2980 | Kokkedal |
| EL:CON A/S | 8210 | Aarhus V |
| Elcanic A/S | 5750 | Ringe |
| Elcee ApS | 9800 | Hjørring |
| Elma Instruments A/S | 3520 | Farum |
| Elmatica A/S | 5250 | Odense SV |
| Elprint ApS | 4000 | Roskilde |
| Eltronic A/S | 8722 | Hedensted |
| Eltronic Wind Solutions A/S | 8722 | Hedensted |
| EMRI A/S | 2730 | Herlev |
| Energy Innovation Cluster | 6700 | Esbjerg |
| Energysolution A/S | 8381 | Tilst |
| Envotherm A/S | 6500 | Vojens |
| EOT - Electronics of Tomorrow | 7400 | Herning |
| Erhvervsakademi Sjælland | 4600 | Køge |
| estron a/s | 8653 | Them |
| Etch A/S | 3520 | Farum |
| ETK EMS Skanderborg A/S | 8660 | Skanderborg |
| EUC Lillebælt | 7000 | Fredericia |
| Eurochannels ApS | 9460 | Brovst |
| EuroTechnic A/S | 9530 | Støvring |
| Expression ApS | 8660 | Skanderborg |