In 1979, in partnership with son-in-law Arnold Weinstock, Michael Sobell met with his greatest success with the champion colt Troy whose performances made him 1979's British flat racing Champion Owner. Among Troy's wins were England and Ireland's most prestigious races, the Epsom and Irish Derbys, as well as the Benson & Hedges Gold Cup, and the King George VI and Queen Elizabeth Stakes. In 1983, Sobell's filly Sun Princess won The Oaks and the St. Leger Stakes. Prince of Dance dead-heated for the 1988 Dewhurst Stakes.