Allianz said Pimco chief executive and co-chief investment officer Mohamed El-Erian has resigned from the investment firm, effective mid-March.

Mr. El-Erian will stay on the international executive committee of Allianz and will advise the board of management of Allianz SE on global economic and policy issues, the company said Tuesday.

Bill Gross will remain chief investment officer, the company said.

Write to Anna Prior at anna.prior@wsj.com

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