 Alliancebernstein L.P. raised its position in Affiliated Managers Group, Inc. NYSE:AMG by 8.5 during the 4th quarter, according to the company in its most recent 13F filing with the Securities Exchange Commission. The firm owned 87,883 shares of the asset managers stock after buying an additional 6,868 shares during the quarter. Alliancebernstein L.P. owned ... 