| Blocker | — | — | — | |
| Blockhausbau Löhne | — | — | Löhne | Germany |
| Blue Sea Systems | — | +1 360-738-8230 | Bellingham | United States |
| Blumer-Lehmann | — | — | Gossau | Switzerland |
| Blütencamping Riegelspitze | — | — | Werder | Germany |
| Bockstahler Elektroanlagen | — | +49 7641 2244 | Emmendingen | Germany |
| Bodycote Hirzenhain | — | — | Hirzenhain | Germany |
| Bodycote Menden | — | — | Menden | Germany |
| Bodycote Wärmebehandlung GmbH | — | — | Düsseldorf | Germany |
| Bohnstedt-Waghaeusel | — | — | — | Germany |
| Boll & Kirch Filterbau GmbH | — | — | Kerpen | Germany |
| Bonnies-Hofladen | — | — | — | |
| Boost-Style | — | — | — | |
| Bootshaus Cologne | — | +49 221 98944840 | Köln | Germany |
| Boreal Light | — | +49 174 4453532 | Berlin | Germany |
| BorgWarner Akasol GmbH | pdohm@borgwarner.com; | — | Darmstadt | Germany |
| BorgWarner Inc. | — | +1 248-754-9200 | Auburn Hills | United States |
| Born & Ermel | — | — | Achim-Baden | Germany |
| Borussia Mönchengladbach | — | +49 180 6 181900 | Mönchengladbach | Germany |
| Bosch | — | +49 711 40040990 | Gerlingen | Germany |
| Bosch Rexroth | — | Telefon: +49 (0)9352-18 0 | Lohr am Main | Germany |
| Bosch Solar Services GmbH | — | — | Arnstadt | Germany |
| Bosselbacher-Hof | kaulen@bosselbacher-hof.de | +49 2429 2009 | Hürtgenwald-Vossenack | Germany |
| Brandhuber Elektro GmbH | — | — | Neuötting | Germany |
| Brass-Gruppe | — | — | Aschaffenburg | |