Stephen Helmuth Floersheimer (21 March 1925 - 6 April 2011) was a Swiss investment banker, philanthropist and art collector, who founded the Floersheimer Center for Constitutional Democracy.The son of Walter and Charlotte Floersheimer, he was born in Frankfurt, and moved to Belgium and then the United States in 1933.
After studies at Oxford and training at a bank, he moved with his family to Zurich, Switzerland in 1977.