| Name | Type | Country |
|---|---|---|
| Baltogar | Enterprise | Spain |
| BCAM | Association | Spain |
| BERGÉ MARITIMA BILBAO | Enterprise | |
| Bilbao Bizkaia Kutxa | Enterprise | Spain |
| Bilboats | Enterprise | Spain |
| Bilbomática | Enterprise | Spain |
| Biomimetiks | Enterprise | Spain |
| Bombardier | Enterprise | Spain |
| Brisa | Enterprise | Portugal |
| Brunnschweiler | Enterprise | Spain |