Aidan O'Brien's Derby Record: 11 Wins and What They Mean for Punters

No trainer in the history of the Epsom Derby has won the race more times than Aidan O’Brien. His 11 victories include a hat-trick from 2023 to 2025 – three consecutive years of Ballydoyle dominance that turned what was already an extraordinary record into something without parallel in the modern era. For punters, this presents a unique challenge: how do you bet intelligently on a race where one operation supplies a disproportionate share of the contenders and an even larger share of the winners?

O’Brien himself has spoken about how the Derby sits at the very centre of the Coolmore-Ballydoyle operation, from the moment matings are planned right through to the training process. That level of institutional focus is not something any other stable in the world can replicate at the same scale, and it shows in the results.

From Galileo to Continuous: The Eleven O’Brien Derby Winners

The first arrived in 2001, when Galileo won by three and a half lengths and announced himself as the horse who would later reshape the thoroughbred breed from the stallion paddock. High Chaparral followed in 2002. Camelot came agonisingly close to the Triple Crown in 2012, winning the Derby in emphatic fashion before falling short in the St Leger. Then came Australia, Ruler of the World, Wings of Eagles, Anthony Van Dyck, Auguste Rodin, City of Troy, and most recently the three in succession through 2023, 2024, and 2025 – a run that gave O’Brien 11 victories from 24 runnings, or nearly half the Derbys this century.

What connects these winners is not a single style or profile. Galileo was a devastating front-runner. Wings of Eagles was a 40/1 shock. Auguste Rodin was a class act rebounding from a poor Guineas run. The thread that runs through all of them is preparation: each arrived at Epsom at precisely the right moment in their development, with the right fitness foundation and the right tactical plan. That is what Ballydoyle does better than anyone – not just produce talent, but time it.

For context, Lester Piggott won nine Derbys as a jockey. O’Brien has surpassed that mark as a trainer, and he shows no sign of slowing down. Every year Ballydoyle sends two, three, or sometimes five runners to Epsom, and every year at least one of them runs a major race.

When Ballydoyle Saddles Three, Four or Five: How to Separate Them

Here is the puzzle that confronts Derby punters every June: O’Brien enters multiple runners and the market has to decide which one is the stable’s first string. Sometimes the answer is obvious – one horse is clearly ahead on ratings and trial form. Other years, particularly when O’Brien’s runners arrive via different trial routes, the hierarchy is murky.

Twenty-one of the last 23 Derby winners had no more than five career starts before their victory. That filter is useful when separating O’Brien’s entries because Ballydoyle often enters both lightly raced and more exposed types. The horse with fewer starts – the one still on an upward curve – tends to be the more dangerous, even if its form figures look less impressive on paper. Sixteen of the last 24 winners won their previous start, and cross-referencing that trend against each O’Brien entry can help narrow the field within the stable.

Jockey bookings are the most reliable public signal. When Ryan Moore is aboard, the market takes notice, and rightly so – Moore has been O’Brien’s number one for the biggest occasions. But Moore has also been on beaten O’Brien runners in the Derby, so the booking is a clue rather than a guarantee. If Moore switches from one Ballydoyle horse to another in the final days before the race, that is a stronger signal than any piece of work on the gallops.

Odds Patterns Around O’Brien’s Derby Runners

Something interesting happens in the ante-post market when Ballydoyle is well represented. The stable’s perceived first choice tends to be overbet by the public, who equate O’Brien’s record with a single-horse narrative. Meanwhile, the stable’s second or third string drifts to bigger prices than their ability warrants, because the market is concentrating its O’Brien investment on the supposed number one.

This creates a recurring pattern: O’Brien’s longest-priced runner is often better value than its odds suggest. Wings of Eagles at 40/1 in 2017 was a case in point – a horse that was not heavily fancied within the Ballydoyle squad but arrived at Epsom with the right profile and the right run in the race. Punters who had dismissed it because it was not the stable’s headliner missed a windfall.

My approach is to assess each O’Brien entry individually against the statistical trends that define Derby winners – career starts, last-out form, rating, running style – and then compare the prices. If the stable’s second string matches those trends as well as or better than the first choice but is available at twice the odds, the value lies with the outsider. The overall record tells you Ballydoyle will be competitive. The individual profiles tell you which horse to back.

What Happens When the Rest of the Field Fights Back

O’Brien’s dominance can obscure the fact that 13 of the last 24 Derbys have been won by other trainers. When Ballydoyle does not win, the pattern is often the same: a rival arrives with a specific Epsom profile – balanced action, proven stamina, a jockey who rides the track well – that overcomes the raw quality depth of the O’Brien entries.

Lambourn’s victory in 2025 at 13/2 was a prime example. The favourite that year, Delacroix, was an O’Brien-trained runner who finished ninth. Lambourn led from the front, handled the camber, and had too much stamina for the closers. The lesson: Ballydoyle’s breadth of entries does not immunise them against a well-prepared horse with the right attributes for the course.

When I am weighing up whether to back an O’Brien runner or oppose the stable entirely, I ask one question: does the non-Ballydoyle contender have a clear, articulable edge for the specific demands of Epsom? If the answer involves course profile, running style, or going preference rather than just raw ability on ratings, I lean towards the opposition. The trends and statistics guide breaks down the full set of data points that separate Derby winners from the rest, which is essential reading before making that call.