0001016964-13-000008 13F-NT 1 20130331 20130502 20130502 20130502 OLD MUTUAL (US) HOLDINGS INC. 0000796370 6282 042714625 DE 1231 13F-NT 34 028-11931 13807057 200 CLARENDON STREET, 53RD FLOOR BOSTON MA 02116 (617) 369-7300 200 CLARENDON STREET, 53RD FLOOR BOSTON MA 02116 UNITED ASSET MANAGEMENT CORP 19920703 13F-NT 1 omush03311313f.txt FORM 13F FOR 3/31/13