X0206 3 2012-10-05 0 0000860546 CORPORATE OFFICE PROPERTIES TRUST OFC 0001323255 APG Asset Management US Inc. 666 THIRD AVENUE SECOND FLOOR NEW YORK NY 10017 0 0 1 0 0001434820 APG Group OUDE LINDESTRAAT 70 POSTBUS 6401 HEERLEN P7 00000 NETHERLANDS 0 0 1 1 Parent Company 0001434819 APG All Pensions Group NV GUSTAV MAHLERPLEIN 3 1082 MS AMSTERDAM P7 00000 NETHERLANDS 0 0 1 1 Parent Company Corporate Office Properties Trust (OFC) 0 D Ludmila Chwazik 2012-10-15