William A. Downe CM (born 1952 in Montreal, Quebec, Canada) is a Canadian banker. He has been the president and chief executive officer of Bank of Montreal (also known as BMO Financial Group) from March 1, 2007 to October 31, 2017.
Downe joined Bank of Montreal in 1983 and held a variety of senior management positions in Canada and the U.S. In 1999, he was appointed vice-chair, Bank of Montreal. From 2001 to 2006, he was deputy chair of BMO Financial Group, and CEO of BMO Capital Markets.
In February 2006, Downe was named chief operating officer and was chosen to replace Tony Comper as president and chief executive officer of BMO effective March 1, 2007, the day of BMO's annual general meeting.
In April 2017, it was announced that Downe will retire as CEO effective on October 31, 2017. He will be succeeded by current COO Darryl White, who had previously served as Group Head of BMO Capital Markets.
Downe is the only Canadian member of the International Business Leaders Advisory Council of the Mayor of Beijing, and he is a member of the International Advisory Council of Guanghua School of Management at Peking University. He is a director of Catalyst, and a member of Catalyst’s Canadian Board of Advisors. Downe is also a member of the Economic Club of Chicago and Past President of the Federal Reserve Board's Federal Advisory Council.
Downe served as Chairman of the 2009 Campaign Cabinet for United Way of Greater Toronto. He is a member of the Rotman School of Management Campaign Cabinet, and he sits on the board of Toronto’s St. Michael's Hospital Foundation. He is also past Chair of the Board of Directors of St. Michael's Hospital.
Downe has a Bachelor of Arts degree from Wilfrid Laurier University. While obtaining a Master of Business Administration from the University of Toronto, he joined the Alpha Delta Phi Fraternity. In 2003, he received the Rotman Distinguished Business Alumni Award from the Joseph L. Rotman School of Management.