Cryptocloser (1994–2000) was a Canadian Thoroughbred Champion racehorse. He was sired by multiple Grade I winner Cryptoclearance, and his damsire was Northern Dancer's son, Vice Regent. The colt was owned in partnership by American businessman and future United States Ambassador to Finland Earle I. Mack, and Mississauga, Ontario businessman William A. Sorokolit, Sr. Out of racing for two years, in his return on July 22, 2000, Cryptocloser suffered a broken shoulder after falling down past the wire and had to be euthanized.