Constitution River won the Prix du Jockey Club on May 31, 2026, leading a 1-2-3 finish for trainer Aidan O'Brien [1], [2], [4].
The result marks a rare feat of dominance in a Group 1 race, signaling the superior preparation of O'Brien's Irish-trained squad on the international stage.
Constitution River, ridden by Ryan Moore, secured the victory at the Chantilly Racecourse in France [2], [5]. The horse overcame a difficult draw to win the 2,100-meter contest [2], [3]. Stablemates Hawk Mountain, ridden by Christophe Soumillon, and Montreal, ridden by Wayne Lordan, finished second and third, respectively [1], [3].
The race carried a total prize fund of €1.5 million [1]. O'Brien said the victory was due to the determination of the horses and the coordination between his riders. He said the stablemates fought like lions to secure the top three positions [6], [7].
O'Brien highlighted the tactical communication between his team during the lead-up to the event. "I knew the three lads (jockeys) were speaking before the race and were communicating very well and they had everything very ..." O'Brien said [8].
The victory at Chantilly reinforces the standing of the Ballydoyle stable as a powerhouse in European racing. The clean sweep of the podium underscores a level of depth in talent and training that few other stables can match in a single high-stakes event [2], [3].
“Constitution River won the Prix du Jockey Club on May 31, 2026, leading a 1-2-3 finish for trainer Aidan O'Brien.”
A 1-2-3 finish in a Group 1 race is an exceptional rarity in Thoroughbred racing, demonstrating not only the quality of individual horses but the strategic depth of the trainer's program. By dominating the Prix du Jockey Club, O'Brien has established a psychological and competitive advantage heading into the remainder of the European flat racing season.
