Aidan O'Brien
The master of Ballydoyle — one of the most successful Flat trainers in the history of the sport.
Aidan O'Brien trains the Coolmore horses at Ballydoyle in County Tipperary and has redefined big-race Flat training, winning Classics and Group 1s across Europe and beyond year after year. The operation's strength in the top middle-distance and Classic races is without parallel.
As with the big jumps yards, O'Brien often runs several in a Group 1, using pacemakers and multiple entries tactically — so understanding which is the stable's first string, and how a race is likely to be run, is key to reading his runners. Ballydoyle two-year-old and Classic form sets the European standard.
Known for
- Numerous Epsom & Irish Derby wins
- Record Classic haul
- Global Group 1 success
Recent runners we've recorded
From our racing database — the last 2 runs we've logged for Aidan O'Brien. 0 won · 0 placed. Each links to the horse's full form.
| Date | Horse | Course | Result |
|---|---|---|---|
| 2026-07-25 | Dee's Funny Girl | Ascot | — |
| 2026-07-24 | Feel Happy | Cork | — |
Aidan O'Brien's runners and the model
When Aidan O'Brien has runners, our model reads every one of their races — probabilities and value against the market — on today's racecards. It doesn't follow yards or names; it prices each runner on the data.
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