Alpha Bank is the fourth largest Greek bank by total assets but the second largest by market capitalisation of 1.44 Billion Euro as of 29 September 2015. It has a subsidiary and branch in London, and branches and subsidiaries throughout Southeastern Europe (see "International expansion" below). Founded in 1879, it has been controlled by the Costopoulos family since the very beginning. Currently Ioannis Costopoulos, who is the grandson of the original founder John F.