Cargill MacMillan Sr.Cargill MacMillan Sr. was an American business executive, serving as the President of Cargill in Minneapolis.Early lifeMacMillan was born on October 10, 1900. He was the second son of John H. MacMillan Sr. and Edna Clara Cargill.CareerMacMillan served as the President of Cargill.Personal lifeHe married Pauline Whitney, and they had four children. Each of the three surviving adult children received a one-ninth share of Cargill. Cargill MacMillan Jr. Whitney MacMillan Alice Whitney MacMillan Pauline MacMillan KeinathDeathMacMillan died on October 16, 1968.