NEW YORK (AP) — One of the world’s most closely watched investors is leaving Pimco as part of a series of leadership changes at the giant money manager.

Mohamed El-Erian will leave Pacific Investment Management Co. in mid-March, according to the company’s parent, Allianz. El-Erian is Pimco’s CEO and, along with famed investor William Gross, is co-chief investment officer. In a brief statement, Allianz gave no explanation for the departure.