Irish trainer Aidan O’Brien celebrated a podium sweep after Found won Europe’s most prestigious horse race, the Prix de l’Arc de Triomphe, at Chantilly on Sunday.

The four-year-old Irish filly, saddled by Ryan Moore, kicked with four furlongs to run to convincingly win the Arc, the richest race in Europe with €5 million (HK$43.6 million) in total prize money.

Highland Reel and Order of St George came in second and third to round off an outstanding day’s racing for O’Brien, whose sole previous Arc victory was by Dylan Thomas nine years ago.

Pre-race 2-1 favourite Postponed came in fifth.

“It’s a great feeling to saddle the first three home in an Arc, there’s not much to beat it, but it’s all down to a fantastic team effort and I’m delighted for [owners] John [Magnier], Michael [Tabor], Derrick [Smith] and their families,” O’Brien was quoted as saying on sportinglife.com.

“And what makes it amazing is that they are all by Galileo,” he said of the retired Irish thoroughbred he used to train but is now an active sire.

O’Brien added: “It’s a privilege to be here and be part of it. How can you see anything higher [in his career] than this?

“I couldn’t dream this would happen. You know how difficult the Arc is.

“She’s only run over a mile and-a-half four times before and she was unlucky in the Arc last year.

“Epsom [Coronation Cup] was also a falsely-run mile and-a-half, and we came here very hopeful after a good run last time.

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“We’ve had our eye on this for a long time. When Ryan rode her as a two-year-old and said she could win an Arc – he was obviously right.”

As the horses hit the home stretch in perfect conditions at the racetrack north of Paris, Found sped through the jostling field along the inside rail with Highland Reel on her coattails and found herself with a free run-in to the line.

Found’s victory ended a run of five successive runners-up spots in Group One races, including being beaten by Postponed in the Coronation Cup at Epsom in June.

But the filly, listed at 6/1, had run a superb prep race for the Arc in finishing second in the Irish Champion Stakes in September.

“It’s the most special race of the year!” Found’s jockey Moore beamed of the Arc.

The Arc is currently the third richest race in world after the Melbourne Cup (US$6.2 million) and Dubai World Cup (US$10 million).