The corporate banking division offered working capital financing, customer-tailored loans, treasury products and brokerage services.

[1] The founders of the bank were John Markopoulos, Anthony Athanasoglou and Elias Lianos.

In September 2008 Proton Bank's major shareholder IRF fund sold their shares to other shareholders and a few days later Piraeus Bank started negotiations to acquire Proton [6] [7] .

The agreement finalized in November 2008 with Piraeus Bank acquiring 31.31% of Proton's total shares.

It was the first broker in Greece to establish and operate the Reuters Order Routing system in both modes, allowing Proton Bank to operate in Execution Venue Mode receiving orders directly on-line from foreign brokers for the Athens Exchange, as well as in Order Entry Mode placing orders directly on-line to foreign brokers, members of international exchanges.