X0202 4 2008-04-15 0 0000073124 NORTHERN TRUST CORP NTRS 0001124194 CROWN SUSAN 1 0 0 0 Common Stock 2008-04-15 4 A 0 1175.779 A 6422.999 D Common Stock 8400 D Common Stock 4000 I See ftn. Common Stock 339696 I See ftn. Represents stock units payable automatically on a one-for-one basis in shares of the issuer's common stock Excludes stock units described in Note 1 Owned by various trusts of which the children of the Reporting Person are beneficiaries. Owned by a partnership, Henry Crown and Company (Not Incorporated), of which trusts for the benefit of the Reporting Person and the children of the Reporting Person are partners. The Reporting Person disclaims beneficial owenership of the share d4escribed in Notes 3 and 4, except to the extent of her beneficial ownership in the entities that own such shares. /s/ Susan Crown 2008-04-17