Marshall & Ilsley (M&I) marshals the material means for managing money. The holding company owns flagship subsidiary M&I Marshall & Ilsley Bank, M&I Bank, and Southwest Bank, which have more than 275 bank branches in the Midwest, plus some 90 more in Arizona, Florida, and Las Vegas. It is the largest bank in Wisconsin; Minneapolis, Indianapolis, Kansas City, and St. Louis are other key markets. Focusing on retail and commercial banking and wealth management, M&I offers standard services such as deposits, credit cards, mortgages, and business and consumer loans, as well as trust, financial advisory, private banking, mutual funds, and brokerage services. Bank of Montreal is buying M&I for some $4.1 billion.