Swiss digital asset bank Sygnum has raised $40 million in an over-subscribed growth financing round. : An inital $35 million target was exceeded with Azimut Holding, a global asset management group and existing client, as the lead investor.The round pushes Sygnum's valuation up to $900 million, a $100 million uplift from its $90 million Series B in october 2022.Since then, Sygnum's assets under administration have grown to over $4 billion, with a client base of over 1,700 from more than 60 countries.