Marshall & Ilsley Corporation (M&I) is a bank holding company, and is certified as a financial holding company. It provides its subsidiaries with financial and managerial assistance areas, such as budgeting, tax planning, auditing, compliance assistance,Marshall & Ilsley offers standard banking services, including checking and savings accounts, CDs, and credit cards, business loans, commercial real estate loans, and residential mortgages. Other services include investment management, financial planning, equipment leasing, trust services, brokerage, and insurance.