Marshall & Ilsley

Marshall & Ilsley Corporation
  • Marshall & Ilsley Bank
  • M&I Bank
Company typePublic
NYSE: MI
IndustryBanking
Founded1847 (1847) in Milwaukee, Wisconsin as Samuel Marshall & Co.
DefunctJuly 5, 2011 (2011-07-05)
FateAbsorbed by BMO Harris Bank
SuccessorBMO Harris Bank
HeadquartersMilwaukee, Wisconsin, United States
Key people
Productsretail and commercial banking, trusts and investment management
RevenueUS$4.025 billion (2008)
US$2.043 billion (2008)
WebsiteArchived official website

Marshall & Ilsley Corporation (also known as M&I Bank) was a U.S. bank and diversified financial services corporation headquartered in Milwaukee, Wisconsin, that was purchased by Bank of Montreal in 2010.

The bank was founded in 1847 and by 2008 the bank had assets of $63.5 billion and over 250 branches. After the acquisition, Bank of Montreal combined the Marshall & Ilsley Corporation operations into its existing U.S. subsidiary Harris Bank.