Anthony Ernest Oppenheimer (born June 1937) is a British diamond dealer and racehorse owner.
He was born in June 1937, the son of Sir Philip Oppenheimer, and his wife Pamela Fenn Stirling.
Oppenheimer was president of De Beers Group.
His horse, Golden Horn, won the 2015 Epsom Derby.
Oppenheimer married Penny Barker in 1965, but they divorced in 1983, following her adultery with Captain Fred Barker, a Singer sewing machine heir.
They had two daughters, Sophie and Emily.
Oppenheimer later married Antoinette.