William the Third (horse)

William the Third
William the Third with Morny Cannon up at Ascot Gold Cup
SireSt Simon
GrandsireGalopin
DamGravity
DamsireWisdom
SexStallion
Foaled1898
CountryUnited Kingdom
ColourBay
BreederWilliam Cavendish-Bentinck, 6th Duke of Portland
Owner6th Duke of Portland
TrainerJohn Porter
Record14:10-2-0
Major wins
Newmarket Stakes (1901)
Ascot Gold Cup (1902)
Queen Alexandra Stakes (1902)
Doncaster Cup (1902)

William the Third (1898–1917) was a British Thoroughbred racehorse and sire. After finishing unplaced on his only race as a two-year-old in 1900, he won five times in 1901 as well as finishing second in The Derby. He reached his peak as a four-year-old, winning five consecutive races including the Ascot Gold Cup, Queen Alexandra Stakes and Doncaster Cup. His career was ended by injury in early 1903 and he was retired to stud, where he had considerable success as a sire of winners.