Great Lakes Advisors LLC reduced its position in Affiliated Managers Group by 3.4% in the first quarter, selling 3,717 shares. The firm now holds 106,270 shares in the asset manager, according to a recent regulatory filing.

In its most recent regulatory filing, USS Investment Management Ltd disclosed a significant reduction in its holdings of Pfizer Inc. Selling over one million shares during the first quarter, the fund reduced its Pfizer stake by more than half.