X0303 4 2009-07-28 0000073124 NORTHERN TRUST CORP NTRS 0001012340 MOONEY EDWARD J 50 SOUTH LASALLE STREET CHICAGO IL 60603 1 0 0 0 Common Stock 7847.25 D Common Stock 2009-07-28 4 S 0 2600 57.53 D 4600 I By Trust Common Stock 2009-07-29 4 S 0 4600 57.86 D 0 I By Trust Represents stock units payable automatically on a 1-for-1 basis in shares of the Corporation's common stock. The price in Column 4 is a weighted average price. The prices actually received ranged from $57.20 to $57.75. Upon request, the reporting person will provide to the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price within this range. On June 24, 2009, 7,200 previously reported shares of common stock held directly by the reporting person were contributed to the Edward J. Mooney 1992 Trust. The price in Column 4 is a weighted average price. The prices actually received ranged from $57.60 to $58.10. Upon request, the reporting person will provide to the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares sold at each separate price within this range. Paul A. Bernacki Attorney-in-Fact for Edward J. Mooney 2009-07-30