William Rosenwald (August 19, 1903 – October 31, 1996) was an American businessman and philanthropist. His American Securities Corporation invested in other business including AMETEK and Western Union International.
He was a philanthropist who helped establish the nationwide United Jewish Appeal in 1939 and made other charitable grants through the William Rosenwald Family Fund. His father was Julius Rosenwald, the former chairman of Sears, Roebuck and Company and a leading philanthropist whose Rosenwald Fund built 5,000 schools for black children in the South a few decades after the Civil War.
William Rosenwald was born in Wilmette, Illinois in 1903 to Julius Rosenwald and the former Augusta Nusbaum. He attended the MIT Sloan School of Management, where he earned a bachelor of science degree in 1924. Rosenwald also attended Harvard University for a year as well as the London School of Economics. He was employed by Sears, Roebuck starting in 1928, and was a director of the firm from 1934 to 1938.
It was also in 1928 that Rosenwald married his first wife, Renee Scharf, daughter of Austrian painter Viktor Scharf II.
He organized a family effort in the mid-1930s to provide assistance to relatives in Europe affected by the rise of Nazi Germany. By 1948 over 300 individuals had been brought to the United States and provided with work and places to live. An additional 300 family members in Europe were also provided for. In a 1935 interview, Rosenwald stated that "There is the thought in my mind -- and that I would like to get across to the Jews of America -- that to the extent that the Jews as a whole help their suffering brethren, we will fortify the Jews of all countries against anti-Semitic onslaughts." He organized the National Refugee Service (later a part of the Hebrew Immigrant Aid Society) in 1939, to help resettle refugees.