Stephane Pasquier started his career as an apprentice with Robert Collet. His big break came when he was appointed second jockey to the Wildenstein family in 2004 and enjoyed his first Group 1 winner in the Prix Royal Oak on Westerner later the same year.
In 2006 he recorded his greatest victory so far when Rail Link took the Group 1 Prix de l’Arc de Triomphe at Longchamp and further joy followed in 2007, when he was crowned French champion jockey. In 2007 he also partnered the outstanding Manduro to three Group 1 victories.
In 2010 he enjoyed a Classic double aboard Special Duty, winner of both the English and French 1000 Guineas, while he won the French 2000 Guineas on Lucayan in 2012. He had a notable double on Maxios in 2013, riding him to victory in two Group 1 races at Longchamp, the Prix d’Ispahan in May and the Prix du Moulin in September.