Marshall & Ilsley Corporation was a U.S. bank and diversified financial services corporation headquartered in Milwaukee, Wisconsin, that was purchased by ...
Founded in 1847, Marshall & Ilsley Bank, or M&I, was Milwaukee's oldest and largest bank before being acquired by Toronto-based BMO Harris Bank in 2011.
We're here to help! BMO offers a wide range of personal and business banking services, including bank accounts, mortgages, credit cards, loans and more.