| EOS B.V. | |
| EPHEC | |
| Epics Therapeutics | |
| EpiGaN N.V. | Limburg |
| Epitopoietic Research | |
| Epitopoietic Research Corporation | |
| epowerhr | Antwerp |
| Epson België | Flemish Brabant |
| Erasmushogeschool Brussel | |
| ERTICO - ITS Europe | Brussels-Capital |
| ESC B.V. | East Flanders |
| Escent | Brussels-Capital |
| Esdaco | Antwerp |
| ESI Informatique | Liège |
| Eskidoos | |
| ET-Consulting | |
| Eteamsys | Liège |
| Ethera | Flemish Brabant |
| eTheRNA | |
| ETIS | Brussels-Capital |
| ETS Informatics | |
| Euregio.Net AG | Liège |
| EUREKA Secretariat AISBL | Brussels-Capital |
| Euresys S.A. | Liège |
| EURid | Brussels-Capital |
| Euro View Services S.A. | Hainaut |
| Eurocircuits N.V. | Antwerp |
| Eurogentec | |
| EuroISPA | Brussels-Capital |
| European Association of Remote Sensing Companies | |
| European Cyber Security Month | |
| European Data Centre Association | Brussels-Capital |
| European Data Protection Supervisor | Brussels-Capital |
| European Electronic Component Manufacturers' Association | |
| European FinTech Association a.s.b.l. | |
| European Innovation Council | |
| European Payments Council AISBL | |
| European Startup Initiative | Brussels-Capital |
| European Startup Network | Brussels-Capital |
| European Tech Alliance | |
| European University Association | Brussels-Capital |
| EuroscreenFast | |
| Eurosmart | Brussels-Capital |
| EuroSTAR Conference | |
| Eutronix S.A. | Walloon Brabant |
| Evenflow Consulting | |
| Eventflare | |
| Ever Near N.V./S.A. | Flemish Brabant |
| Evercom S.P.R.L. | Brussels-Capital |
| EVO Group | |