Marshall & Ilsley Corporation Announces 14.3 Percent Increase to Quarterly Cash Dividend

Marshall & Ilsley Corporation Announces 14.3 Percent Increase to
Quarterly Cash Dividend
John W. Daniels, Jr., Elected to Board of Directors



MILWAUKEE, April 26  /PRNewswire-FirstCall/ -- Marshall & Ilsley Corporation
(M&I) today announced at its Annual Shareholders' Meeting that its board of
directors has increased the quarterly cash dividend on its common stock 14.3
percent to $.24 per share from $.21 per share. The cash dividend is payable on
June 10, 2005, to shareholders of record at the close of business as of May 27,
2005.

At the meeting, John W. Daniels, Jr., was elected to Marshall & Ilsley
Corporation's board of directors.  Daniels, 56, is a partner and member of the
executive committee of Quarles & Brady, L.L.P.  He is also national president,
American College of Real Estate Lawyers, and a director of the Metropolitan
Milwaukee Association of Commerce, and the Medical College of Wisconsin.

The board of directors also named Mark F. Furlong, President, Marshall & Ilsley
Corporation. Furlong will also continue to serve as President of M&I Marshall &
Ilsley Bank.

  In addition, the following directors were re-elected to three-year terms:

   Andrew N. Baur, chairman of the board, Southwest Bank of St. Louis, a
   subsidiary of Marshall & Ilsley Corporation;

   John A. Mellowes, chairman and chief executive officer of Charter
   Manufacturing Company, Inc.;

   Robert J. O'Toole, chairman of the board, chief executive officer, and
   past president of A.O. Smith Corporation;

   John S. Shiely, chairman of the board, president and chief executive
   officer, Briggs & Stratton Corporation.



Marshall & Ilsley Corporation (NYSE:MI) is a diversified financial services
corporation headquartered in Milwaukee, Wis., with $41.6 billion in assets.
Founded in 1847, M&I Marshall & Ilsley Bank has the largest banking presence in
Wisconsin with 195 offices throughout the state. In addition, M&I has 35
locations throughout Arizona; 12 offices in metropolitan Minneapolis/St. Paul,
Minn.; and, locations in Duluth, Minn.; Las Vegas, Nev.; and, Naples and Bonita
Springs, Fla. M&I's Southwest Bank affiliate has six offices in the St. Louis
area and one office in Belleville, Ill. Metavante Corporation, Marshall &
Ilsley Corporation's wholly owned technology subsidiary, provides virtually all
of the technology an organization needs to offer financial services. M&I also
provides trust and investment management, equipment leasing, mortgage banking,
asset-based lending, financial planning, investments, and insurance services
from offices throughout the country and on the Internet (
http://www.mibank.com/ or http://www.micorp.com/ ). M&I's customer-based
approach, internal growth, and strategic acquisitions have made M&I a
nationally recognized leader in the financial services industry. 

DATASOURCE: Marshall & Ilsley Corporation



CONTACT:  John Presley, senior vice president, chief financial officer,

Marshall & Ilsley Corporation, [phone]



Web site:  http://www.micorp.com/

http://www.mibank.com/ 

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