Shantou was unraced as a juvenile and made his racecourse debut in April 1996 when he finished third in the Wood Ditton Stakes at Newmarket Racecourse. He went on to run second in a maiden race at Chester Racecourse on 7 May before recording his first success in a similar event over ten furlongs at Sandown Park Racecourse three weeks later.[5]
The 220th running of the St Leger Stakes over 14+1⁄2 furlongs at Doncaster Racecourse on 14 September attracted a field of eleven and Shantou started the 8/1 fourth choice in the betting behind Dushyantor, Mons (Royal Lodge Stakes) and Gordi (Queen's Vase). Ridden by Frankie Dettori he was in contention from the start and finished strongly to catch Dushyantor in the final strides and win by a neck.[7]
Shantou was then sent to Italy for the Group 1Gran Premio del Jockey Club over 2400 metres at San Siro Racecourse in Milan when he was matched against older horses for the first time. With Dettori in the saddle he started 1.4/1 favourite and won "comfortably" by three lengths from Sacrament with Strategic Choice in third.[8] For his final run of the season the colt was sent to Canada and finished fourth behind Pilsudski, Singspiel and Swain in the Breeders' Cup Turf.
1997: four-year-old season
For his first run as a four-year-old, Shantou ran for the second time at San Siro Racecourse and recorded another Group 1 success when he took the Gran Premio di Milano over 2400 metres on 15 June, beating Luso by 1+1⁄2 lengths after taking the lead 2400 metres from the finish.[9] On 8 July at Newmarket the colt started 11/4 second favourite for the Princess of Wales's Stakes and produced a strong late run to win by a head from Swain, with Celeric, Dushyantor and Lady Carla finishing behind.[10]
Retired to stud in 1999–2004 at S.A.B. Societa Allevamento di Besnate, Italy and At stud in 2005–19 standing at Burgage Stud, Ireland. Pensioned in December 2020. As a breeding stallion Shantou had his greatest success as a sire of National Hunt horse.[11] He died on 1 September 2021 at the age of 28.[12]