GLOBAL - Mike O'Brien, head of EMEA institutional business at BlackRock, is to leave the company.
He is to pursue business interests outside investment management.
O'Brien spent 10 years at Barclays Global Investors before it was acquired by BlackRock last year.
His successor is to be Charles Prideaux, currently chief executive of BlackRock's fundamental equities business.
Prideaux has spent 21 years at BlackRock and its predecessors Mercury Asset Management and Merrill Lynch Investment Managers.
BlackRock is the largest investment manager in the world, managing €2.3trn in total AUM as of end-2009 and €466bn in assets for European institutions, according to IPE's Top 400 Asset Managers 2010 report.
BlackRock staff were informed of O'Brien's departure today - his last day in the office will be Monday, 28 June.