August Belmont IV followed a family tradition by becoming active as a racehorse owner. However, his involvement was to a far lesser extent than his grandfather, August Belmont Jr., founder of Belmont Park, and his great-grandfather, August Belmont, for whom the third leg of the U.S. Triple Crown series, the Belmont Stakes is named. Among his stakes race winners he owned alone or in partnerships were Dew Line, Heed, Quadratic, and Caveat with whom he won the 1983 Belmont Stakes.
