Mutual fund manager AIM Investments announced Tuesday it has reshuffled the portfolio management team and investment styles on three of its growth funds in an effort to boost their sagging performance.

The Houston-based company said, beginning Nov. 30, Roger Mortimer and Glen Hilton will join Robert Leslie as co-managers of the AIM Opportunities I Fund, AIM Opportunities II Fund and AIM Opportunities III Fund. Mortimer and Hilton replace Charles Scavone and Brent DeMuth. Mortimer will serve as the lead manager. Both Scavone and DeMuth will remain with the company, but their roles were not clearly defined.

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