Marshall & Ilsley Corporation to Release First Quarter Earnings on Monday, April 17

MILWAUKEE, March 28  /PRNewswire-FirstCall/ -- Marshall & Ilsley Corporation today announced it will release its first quarter 2006 earnings on Monday, April 17, 2006, at 8:00 a.m. (Central Daylight Time). A conference call will be held at 11:00 a.m. (CDT). Individuals interested in listening should call 1-800-458-9009 and ask for M&I's quarterly earnings release conference call. A replay of the call will be available beginning at 2:30 p.m. on April 17 and will run through 5:00 p.m. April 24, by calling 1-888-203-1112 and entering pass code 411 87 99.

The text of the first quarter earnings press release can be found at ( http://www.micorp.com/ ), Investor Relations, News. Supplemental financial information referenced in the conference call can be found at ( http://www.micorp.com/ ), Investor Relations, Presentations, First Quarter Presentation, after 8:00 a.m. April 17.

Marshall & Ilsley Corporation (NYSE:MI) is a diversified financial services corporation headquartered in Milwaukee, Wis., with $46.2 billion in assets. Founded in 1847, M&I Marshall & Ilsley Bank is the largest Wisconsin- based bank. M&I Bank has 196 offices throughout the state, in addition to 42 locations throughout Arizona; 14 offices in metropolitan Minneapolis/St. Paul, Minn.; and locations in Duluth, Minn.; Las Vegas, Nev.; and, Marco Island, Naples, and Bonita Springs, Fla. M&I's Southwest Bank affiliate has seven 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:  Mark Furlong, president, [phone], or Dave Urban, vice

president, corporate treasury, [phone], both of Marshall & Ilsley

Corporation



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

http://www.mibank.com/ 

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