Whitney Duncan MacMillan

William Duncan MacMillan (July 5, 1930 - October 31, 2006) was an American businessman. A longtime director of Cargill, he maintained a generally low profile. Forbes Magazine assessed him to be a billionaire by the 1970's

Early life He was born on July 5, 1930, the son of John H. MacMillan, Jr. and Marion Dickson. After graduating from the Berkshire School, he received his bachelors degree from Brown University in Providence, Rhode Island in 1953. He maintained his relationship with the university as a member of the board of trustees and with philanthropic gifts to fund scholarships and build the W. Duncan MacMillan Hall.

Personal life MacMillan married twice. His first wife, Sarah Stevens, died in 1995.

Death MacMillan died on October 31, 2006 of an apparent heart attack at his winter home near Jupiter, Florida, aged 76.