Empery made his racecourse debut in September 1975 when he won a
maiden race over 1600
metres at
Longchamp Racecourse. He was then moved up in class for the
Grand Critérium but finished unplaced behind Manado. On his final start of the year he finished second to Arctic Tern in the Group Three Prix Thomas Bryon at
Saint Cloud. On his three-year-old debut, Empery finished fourth behind Red Lord in the
Poule d'Essai des Poulains and then ran poorly when unplaced in the
Prix Daphnis. He then produced his best performance to date when finishing third to his stable companion
Youth (also owned by Nelson Bunker Hunt) and Arctic Tern in the Group One
Prix Lupin at Longchamp. He was then sent to England to contest the Derby, with
Lester Piggott who had ridden six previous winners of the race being engaged to ride the colt at Epsom. On 2 June 1976, Empery started at odds of
10/1 for the Derby against twenty-two opponents, with the
2000 Guineas winner
Wollow starting 11/10 favourite. Nelson Bunker Hunt was not in attendance for the race, the most valuable ever run in Britain, as he was celebrating his 25th wedding anniversary at home in
Dallas. In the early stages of the race, Piggott restrained Empery, before moving up into fourth place at Tattenham Corner. In the straight, Empery made steady progress on the outside to take the lead from
Relkino a furlong from the finish. Once in front, he quickly drew clear of the field to win by three lengths. Piggott's seventh win in the race enabled him to surpass the previous record of six, which he had jointly held alongside
Jem Robinson and
Steve Donoghue. In the
Irish Derby at the
Curragh a month later, Empery started 5/4 favourite but finished second, beaten two and a half lengths by another French colt, the
François Boutin-trained Malacate. He was then aimed at the
Benson & Hedges Gold Cup at
York in August, but missed the race after sustaining an injury on the eve of the race. In autumn, Empery was sent to the United States to contest the
Man o' War Stakes at
Belmont Park. He did not thrive in
quarantine however, reportedly losing fifty
pounds in three days and failed to recover in time for the race. He was then retired to stud. ==Assessment and honours==