Alan Bruce Slifka (October 13, 1929 – February 4, 2011) was a prominent New York City-born hedge fund manager and philanthropist. Born in Manhattan as the twin son of Joseph Slifka, who owned textile and real estate businesses, and Sylvia Slifka, he graduated from the Fieldston School and earned a B.S. from Yale University in 1951, followed by an M.B.A. from Harvard Business School in 1953. Slifka built a distinguished career in finance as an investor and banker, notably running Halcyon Investments. He was a close friend of Hermann Merkin. As a noted philanthropist focused on coexistence initiatives, Slifka co-founded the Abraham Fund to promote Arab-Jewish coexistence, served as the founding chairman of the Big Apple Circus, and established the Alan B. Slifka Chair at Brandeis University's Master's program in Global Sustainability Policy and Management. His commitment to faith-based initiatives supporting Israeli Arabs and Jews earned him honorary doctorates from Brandeis University in 2003 and the University of Haifa in 2008.