CIBC Asset Management Inc. Friday announced portfolio manager changes investors to several U.S. and global investment mandates.

The changes include the addition of American Century Investment Management, Inc., Cornerstone Capital Management, Inc., Pzena Investment Management, Inc. and Sustainable Growth Advisers, LP as portfolio sub-advisors, effective Jan. 2, 2013.

Imperial U.S. Equity Pool

Minneapolis-based Cornerstone will be added as a portfolio sub-advisor for the U.S. large-cap growth component of Imperial U.S. Equity Pool. New York City-based Pzena will be added as a portfolio sub-advisor for a new U.S. large-cap value component of the Pool. Stamford, Conn.-based Sustainable Growth will be added as a portfolio sub-advisor for a new growth component of the Pool. Kansas City-based American Century, CIBC Global Asset Management Inc. and Newport Beach, Calif.-based Metropolitan West Capital Management, LLC will continue to serve as portfolio sub-advisors for other components of the Pool.

Frontiers U.S. Equity Pool

Cornerstone will be added as a portfolio sub-advisor for the U.S. large-cap growth component of the Frontiers U.S. Equity Pool. Pzena will be added as a portfolio sub-advisor for a new U.S. large-cap value component of the Pool. Sustainable Growth will be added as a portfolio sub-advisor for a new growth component of the Pool. Metropolitan West and West Palm Beach, Fla.-based INTECH Investment Management LLC will continue to serve as portfolio sub-advisors for other components of the Pool.

Renaissance U.S. Equity Growth Fund and Renaissance Global Focus Fund

American Century has been appointed as portfolio sub-advisor for the Renaissance U.S. Equity Growth Fund and the Renaissance Global Focus Fund.