Aidan Patrick O'Brien (born 16 October 1969 in County Wexford, Ireland) is an Irish horse racing trainer.

Saval Beg for Capri and Southern France

Aidan O’Brien is likely to run both Capri and Southern France in the Saval Beg Levmoss Stakes at Leopardstown.

Dee Stakes 1-2 For Ballydoyle And Galileo

Circus Maximus (3c Galileo - Duntle, by Danehill Dancer) led home a 1-2 for Ballydoyle and Galileo in Thursday’s Listed Dee Stakes at Chester.

Sir Dragonet claims impressive Vase victory at Chester

Sir Dragonet put himself in the Derby picture as he turned the MBNA Chester Vase Stakes into a procession.

Hermosa lands Guineas double for O’Brien

Aidan O’Brien completed another Guineas double as Hermosa made just about every yard of the running to win the Qipco 1000 Guineas at Newmarket.

O’Brien pleased with manner of Cape Of Good Hope success

Aidan O’Brien is in no rush to commit Cape Of Good Hope to future targets following his midweek victory at Epsom.

Cape Of Good Hope to gain Epsom experience in Trial

Aidan O’Brien’s Cape Of Good Hope will gain some valuable Epsom experience in the Investec Blue Riband Trial.