Ameren Corp., St. Louis, hired Columbus Circle Investors and William Blair & Co. to run $40 million each in active domestic smidcap growth equities for its $3.6 billion defined benefit plan, said Mary Ellen Brown, supervisor-trust investments.
The hires are part of a general rebalancing of the smidcap equity portfolio, Ms. Brown said in a telephone interview. Funding comes from rebalancing as well as the termination of Century Capital Management, which ran about $70 million. The reason for the termination wasn't disclosed.
Ms. Brown also said officials switched the domestic large-cap equities portfolio to be 100% passively managed. Existing passive managers Mellon Capital Management and Northern Trust Asset Management received a total of $100 million from an active manager she wouldn't name. Each manager now runs about $590 million.