Arthur Boyd Hancock III (born February 22, 1943, in Nashville, Tennessee) is an American owner of Thoroughbred racehorses, the owner of Stone Farm, a 2,000 acre (8 km2) horse breeding operation in Paris, Kentucky, and a composer of Bluegrass music.
"Bull " Hancock, Jr. (1910–1972), expanded the business to where it is considered the most important breeding farm in the U.S. during the 20th century and whose sales and influence also impacted European racing.
[1] After graduating from Vanderbilt University, Hancock moved to the New York City area where he worked as an apprentice under future Hall of Fame trainer Edward A. Neloy.
In partnership with one of his longtime clients, Manhattan real estate broker Leone J. Peters, he bred and raced Gato Del Sol who won the 1982 Derby.
Horse of the Year Sunday Silence whose wins included the Kentucky Derby, Preakness Stakes, and Breeders' Cup Classic.