Stifel Nicolaus Europe, a full-service middle-market investment bank based in London, completed the acquisition of Mainfirst Bank. Terms of the transaction were not disclosed. The combined entity will employ more than 400 professionals, operating out of nine offices. "Today is a remarkable day for our firm. Not only is joining Stifel a good cultural fit, but it also enables us to expand further into corporate finance and become even more relevant to clients with greater capabilities to serve both sides of the balance sheet." Ebrahim Attarzadeh, MainFirst CEO and Head of Equities.