X0303 4 2010-03-31 0001399315 MARSHALL & ILSLEY CORP MI 0001180800 ERICKSON RANDY J 770 N. WATER ST. MILWAUKEE WI 53202 1 SVP, Chief Admin. Off. Common Stock 2010-03-31 4 A 0 3726 0 A 164753 D Common Stock 2010-03-31 4 F 0 1596 8.05 D 163157 D Common Stock 32415.1229 I By Deferred Compensation Plan Common Stock 2599 I By IRA Common Stock 1718.0893 I By Retirement Program Shares of Marshall & Ilsley Corporation (the "Company") common stock acquired as stock salary by the Reporting Person under the Company's 2003 Executive Stock Option and Restricted Stock Plan. The shares were fully vested at the time of grant, but are subject to transfer restrictions. One third of the stock salary shares will be released from the transfer restrictions on each of March 31, 2011, March 31, 2012 and March 31, 2013. For more information, please see the Current Report on Form 8-K filed by the Company on December 29, 2009. /s/ Jodi W. Rosenthal, as attorney-in-fact 2010-04-02