Born in Cheltenham, Gloucestershire on March 30, 1998, Tom Marquand took the advice of his father-in-law-to-be, Mark Doyle, to become apprenticed to Richard Hannon, rather than Andrew Balding, after leaving school at the age of 16. He rode his first winner, Mecado, trained by Hannon, in a selling stakes race at Kempton on December 17, 2014. Less than a year later, on October 17, 2015, he was crowned champion apprentice, beating his nearest rival, Jack Garrity, 54-52 after riding a winner at Catterick on the final day of the championship season.
Marquand rode 67 winners in 2015 and rode out his claim on Scarlet Dragon, trained by Eve Johnson Houghton, in a handicap at Newbury on June 30, 2016, on his way to 63 winners in his second full season. As a fully-fledged professional, he has been a fixture in the top five of the British Flat Jockeys’ Championship since 2019, finishing fourth that year, third in 2020, third again in 2021, joint-second in 2022, alongside his wife, Hollie Doyle, daughter of Mark, fourth in 2023, third again in 2024 and joint-fourth, alongside Cieren Fallon, in 2025.
Marquand rode his first Group 1 winner, Addeybb, trained by William Haggas, in the Ranvet Stakes at Rosehill in New South Wales, Australia, on March 21, 2020. He has since added 18 more Grade 1 and Group 1 victories to his career tally, notably including Galileo Chrome, trained by Joseph O’Brien, and Scandinavia, trained by Aidan O’Brien, in the St. Leger Stakes at Doncaster in 2020 and 2025, respectively, and Big Evs, trained by Michael Appleby, in the Breeders’ Cup Juvenile Turf Sprint at Santa Anita in 2023, to name but three. On September 4, 2023, Marquand reached the landmark of 1,000 career winners in Britain on Five Towns, trained by William Haggas, in a fillies’ handicap at Windsor.