Asset manager BlackRock's senior executive Mark Wiedman, who was touted to be a potential successor to CEO Larry Fink, is departing the firm, said two sources familiar with the matter.

BlackRock Inc. is elevating several senior executives to expand its business in the Americas and with key institutional clients, following the announced departure of Mark Wiedman, once seen as a potential successor to Chief Executive Officer Larry Fink.

Mark Wiedman was most recently head of BlackRock’s global client business

Wiedman, head of the global client business, was instrumental in driving BlackRock's growth in passive investing.

Mark Wiedman, head of BlackRock's (NYSE:BLK) global client business and potential successor to CEO Larry Fink, is leaving the asset manager after two decades to pursue other opportunities, according to a media report dated Tuesday.