Origins Magnier was born in
Fermoy,
County Cork, the eldest son of Thomas Magnier (1909–1962) a County Cork landowner. His aunt Mary Elizabeth Hallinan married
Rupert Watson, 3rd Baron Manton, Senior Steward of the
Jockey Club 1982–1985.
Early life Magnier received his formal education at
Glenstal Abbey in
County Limerick but had to leave school at 15 to take charge of the family estate near Fermoy after his father died.
Coolmore Magnier later moved to
County Tipperary, where he helped transform
Coolmore Stud into a multi-million-euro international business. The business is headquartered in County Tipperary where a number of other stud farms are part of an extensive network which includes Longfield and Castlehyde studs. The operation also has branches in
Versailles, Kentucky and at
Jerrys Plains, New South Wales, Australia. Magnier began his association with Coolmore in partnership with his father-in-law and champion racehorse trainer,
Vincent O'Brien, and Vernon's Pools magnate,
Robert Sangster. They developed successful racing horses and breeding stock, mainly by purchasing the progeny of the Canadian stallion
Northern Dancer. Eventually, Magnier came to head the operation. His racing empire is nowadays powered by blue-blooded thoroughbreds trained at
Ballydoyle by
Aidan O'Brien, plus many others in the care of other trainers. Champion sires to have stood at Coolmore include
Sadler's Wells who was
leading sire (by prizemoney won) in Great Britain and Ireland in 14 of the 15 years between 1990 and 2004, though his success in his later years was eclipsed by three other Coolmore stallions, namely
Danehill and his own sons
Galileo and
Montjeu. Other notable Group 1 winners who have turned successfully to stud duties are
Danehill Dancer,
Giant's Causeway, and
Epsom Derby winner
High Chaparral. Less successful at Coolmore was
George Washington, winner of the 2,000 Guineas and
Queen Elizabeth II Stakes in 2006.. George Washington proved infertile, was returned to racing, and suffered a fatal breakdown in the 2007
Breeders' Cup Classic. George Washington was replaced at stud by another son of
Danehill,
Holy Roman Emperor, removed from training at the start of his three-year-old season. Eleven of the fifteen winners of
The Derby between 1998 and 2012 were sired by Coolmore stallions (High Estate, Fairy King, Grand Lodge, Sadler's Wells (two), Danehill, Montjeu (four) and Galileo)
Other business ventures A high-profile venture was his stake of 28.89 per cent shareholding in football club
Manchester United F.C., which was
sold in May 2005 to
Malcolm Glazer, an American businessman. A friendship with manager
Alex Ferguson was tested in a dispute over bloodstock rights to prolific Group 1 winner (seven wins)
Rock of Gibraltar.
Wealth The Sunday Independent estimated his wealth at €2.3 billion in 2018, although this is conservative as
Coolmore Stud is valued at more than €4 billion alone, in addition to his personal property portfolio and other investments and holdings. == Personal life ==