Marshall And Ilsley (2026 Update)

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

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. marshall and ilsley

: BMO Financial Group announced it would acquire Marshall & Ilsley on December 17, 2010. : The acquisition officially closed on July 5,