AIM Investments Chief Investment Officer Ed Larsen has taken a leave of absence to resolve regulators’ inquiries into his role in market timing violations at the firm, the company announced in a letter to shareholders on its Web site Monday. Larsen made the request on his own, the company said.

In his absence, AIM Chief Equity Officer Phil Ferguson and Chief Fixed-Income Officer Bill Alley will continue their duties, reporting directly to President and Chief Executive Officer Mark Williamson.

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