Marshall And Ilsley -

: The bank was led by three generations of the Puelicher family; John "Jack" Puelicher was notably recognized for his conservative leadership from 1963 to 1992.

: The acquisition officially closed on July 5, 2011 , leading to the rebranding of M&I branches to BMO Harris Bank. Historical Significance marshall and ilsley

Marshall & Ilsley Corporation (M&I), founded in 1847 in Milwaukee, Wisconsin, was the largest Wisconsin-based bank until its acquisition by in 2011. Corporate Overview Headquarters : Milwaukee, Wisconsin. Assets at Acquisition : Approximately $51.9 billion. : The bank was led by three generations