Aidan O'Brien

County Of Origin: Wexford

Date of licence: June, 1993

First winner: Wandering Thoughts (Pat Gilson), Tralee, June 7, 1993

Significant horses (selected): Magical, Serpentine, Anthony Van Dyck, Saxon Warrior, Churchill, Minding, Order Of St George, Found, Highland Reel, Ruler Of The World, Gleneagles, Adelaide, Australia, Camelot, So You Think, St Nicholas Abbey, St Mark's Basilica, Lillie Langtry, Fame And Glory, Mastercraftsman, Duke Of Marmalade, Henrythenavigator, Dylan Thomas, George Washington, Yeats, Footstepsinthesand, Oratorio, Santiago, High Chaparral, Hawk Wing, Rock Of Gibraltar, Galileo, Imagine, Giant's Causeway, Peaceful, Love, Saffron Walden, Shahtoush, King Of Kings, Classic Park, Istabraq, Desert King, Urubande, Life Of A Lord. 

Assoc. jockeys: Ryan Moore, Séamus Heffernan, Michael Hussey, Emmet McNamara, Wayne Lordan, Padraig Beggy

Did you know:

Aidan O'Brien has been Irish Champion Flat trainer in terms of prizemoney won in every season since 1999. He began his career with Curragh trainer PJ Finn and was later assistant trainer to both Jim Bolger and Annemarie Crowley who he was later to marry.

Aidan took out his trainer's licence in 1993 and his first winner was Wandering Thoughts at Tralee in June of that year. In the early stages of his career, he broke all manner of records in National Hunt racing in terms of winners trained and also became the first trainer to saddle a 1-2-3 in the 1995 Galway Plate when Life Of A Lord defeated Kelly's Pearl and Loshian. Life Of A Lord went on win the Kerry National at Listowel the following September while he also proved successful in the Whitbread Gold Cup at Sandown the following April, before going back to Galway to claim a second consecutive victory in the Galway Plate.

His remarkable success continued when he moved to Ballydoyle in 1996 and he quickly established himself as one of the leading trainers in the world. O'Brien continues to enjoy tremendous success at home and abroad, winning the biggest races on a continuous basis.

He became the first trainer to win the Epsom Derby in three consecutive years when Australia won in 2014, following on from Ruler Of The World and Camelot. Camelot's success was all the more remarkable as it was the first father/son trainer/jockey partnership to win a British classic. The pair repeated the feat with Australia in the same race in 2014 and they also landed the Doncaster St Leger with Leading Light in 2013. At Royal Ascot in 2015, O'Brien saddled eight winners over the five days.

Minding gave O'Brien his 250th Group/Grade 1 winner on the Flat when taking the 1,000 Guineas at Newmarket in May, 2016. O'Brien saddled his 50th winner at Royal Ascot when Even Song won the Ribblesdale Stakes on Thursday, June 17th, 2016. In October of the same year, he recorded a magnificent 1-2-3 in the €5m Qatar Prix de l’Arc de Triomphe at Chantilly when the Ryan Moore-ridden Found led home Highland Reel and Order Of St George. All three are by leading sire Galileo.

Aidan enjoyed his 300th Group 1/Grade 1 winner (Flat and National Hunt combined) when Highland Reel (Ryan Moore) took the Prince Of Wales's Stakes at Royal Ascot on June 21, 2017. 

On Saturday, October 28, 2017, Aidan set a new world record of 26 Group/Grade 1 wins in a calendar year when Saxon Warrior (Ryan Moore) landed the Racing Post Trophy at Doncaster. He was crowned champion trainer in Britain for the sixth time on the same afternoon. He was to finish the year with 28 Group/Grade 1 winners.

Aidan recorded his 300th Group/Grade 1 winner on the Flat when his son Donnacha partnered Saxon Warrior to win the QIPCO 2,000 Guineas at Newmarket on Saturday, May 5, 2018. 

Aidan set a new record of 152 winners in a Flat season in Ireland when crowned champion trainer 21st time in 2018. Anthony Van Dyck, ridden by Seamus Heffernan, gave Aidan a record-equalling seventh victory in the Epsom Derby in 2019.

Just a year later, he brought his Derby tally to eight (a record) when the Emmet McNamara-ridden Serpentine won at odds of 25/1. His other Epsom Derby winners are: 2001 Galileo, 2002 High Chaparral, 2012 Camelot, 2013 Ruler Of The World, 2014 Australia and 2017 Wings Of Eagles. He has won the Irish Derby on 14 occasions as of 2020. 

At Leopardstown on Thursday, August 6, 2020, Aidan (Military Style), sons Joseph (Thundering Nights and Tonkinese) and Donnacha (Shale) all trained winners on the same card for the first time. 

Aidan recorded his 40th British Classic success, equalling a 158-year-old record held by John Scott, when the Frankie Dettori-ridden Snowfall scored a 16-length success in the Epsom Oaks in June 2021. Aidan's British Classic haul is comprised of a record eight wins in the Epsom Derby, nine wins in the Epsom Oaks, a record 10 wins in the 2,000 Guineas, seven wins in the 1,000 Guineas and six St Leger wins. Two days later after his 2021 Epsom Oaks success, Aidan won the Prix du Jockey Club at Chantilly for the first time with St Mark's Basilica. He also won the French Oaks for the first time in the same year with Joan Of Arc. 

As of 2021, Aidan has 76 Royal Ascot winners to his name. 

Dubai Duty Free Irish Derby (Group 1) (Sovereign - P.B. Beggy - 2019)

Dubai Duty Free Irish Derby (Group 1) (Capri - J.A. Heffernan - 2017)

Dubai Duty Free Irish Derby (Group 1) (Fame And Glory (GB) - J.P. Murtagh - 2009)

Dubai Duty Free Irish Derby (Group 1) (Frozen Fire (GER) - J.A. Heffernan - 2008)

Budweiser Irish Derby (Group 1) (Soldier Of Fortune - J.A. Heffernan - 2007)

Budweiser Irish Derby (Group 1) (Dylan Thomas - K. Fallon - 2006)

Budweiser Irish Derby (Group 1) (High Chaparral - M.J. Kinane - 2002)

Dubai Duty Free Irish Derby (Group 1) (Australia (GB) - J.P. O'Brien - 2014)

Dubai Duty Free Irish Derby (Group 1) (Camelot (GB) - J.P. O'Brien - 2012)

Dubai Duty Free Irish Derby (Group 1) (Treasure Beach (GB) - C. O'Donoghue - 2011)

Dubai Duty Free Irish Derby (Group 1) (Cape Blanco - J.P. Murtagh - 2010)

QIPCO Irish Champion Stakes (Group 1) (Magical - R.L. Moore - 2019)

Budweiser Irish Derby (Group 1) (Galileo - M.J. Kinane - 2001)

Baileys Irish Champion Stakes (Group 1) (Dylan Thomas - K. Fallon - 2006)

ESAT Digifone Irish Champion Stakes (Group 1) (Giant's Causeway (USA) - M.J. Kinane - 2000)

Tattersalls Millions Irish Champion Stks (Group 1) (Dylan Thomas - K. Fallon - 2007)

Ireland The Food Island Champion Stakes (Group 1) (High Chaparral - M.J. Kinane - 2003)

Irish Champion Stakes (Group 1) (Luxembourg - R.L. Moore - 2022)

Irish Champion Stakes (Group 1) (St Mark's Basilica (FR) - R.L. Moore - 2021)

Baileys Irish Champion Stakes (Group 1) (Oratorio - K. Fallon - 2005)

SeasonRuns1st2nd3rd4thWin MoneyPlace MoneyTotal *
Winter All Weather 2022/2023111133€24,000€8,755€32,755
Winter All Weather 2021/202221000€28,500€0€28,500
Winter All Weather 2019/202041100€7,200€4,750€11,950
Winter All Weather 2018/201952101€24,063€18,750€42,813
Winter All Weather 2017/201896120€106,875€25,000€131,875
Winter All Weather 2015/201684910710€77,530€38,495€116,025
Winter All Weather 2014/2015324323€25,200€8,385€33,585
Winter All Weather 2013/201482200€12,600€3,060€15,660
Winter All Weather 2012/2013154200€23,800€2,720€26,520
Winter All Weather 2011/201261110€7,000€2,360€9,360
National Hunt 2016/201771210€18,750€9,613€28,363
National Hunt 2015/20161293121129€301,760€144,720€446,480
National Hunt 2014/201589219108€172,520€59,065€231,585
National Hunt 2013/2014425973€34,650€52,970€87,620
National Hunt 2012/2013121032€7,000€12,130€19,130
National Hunt 2004/200574200€40,950€4,420€45,370
National Hunt 2003/200430000€0€0€0
National Hunt 2002/200362111€21,700€4,160€25,860
National Hunt 2001/2002102220€53,012€7,574€60,586
National Hunt 2000/2001185521€114,023€26,347€140,370
Flat 2022469105764949€3,227,700€1,430,423€4,658,123
Flat 202147388714546€2,405,300€1,231,420€3,636,720
Flat 2020544102626964€2,911,900€1,436,575€4,348,475
Flat 2019641118897466€4,797,425€2,994,658€7,792,083
Flat 2018648152978763€3,690,200€3,151,913€6,842,113
Flat 2017554119858052€4,588,938€2,021,538€6,610,475
Flat 20165881171068964€2,940,013€2,250,189€5,190,201
Flat 201544799734738€2,708,195€1,330,925€4,039,120
Flat 2014520103745151€3,364,538€1,513,815€4,878,353
Flat 2013494135877742€2,538,125€1,329,593€3,867,718
Flat 201249894637156€2,617,390€934,480€3,551,870
Flat 201148393757454€3,453,600€1,374,115€4,827,715
Flat 2010549109796264€3,248,970€1,436,585€4,685,555
Flat 200942789635551€2,909,550€1,713,398€4,622,948
Flat 200840282464650€3,956,390€1,062,535€5,018,925
Flat 200734467474542€3,457,810€1,649,830€5,107,640
Flat 200630663523637€3,208,340€924,230€4,132,570
Flat 200525562422725€2,675,715€1,015,740€3,691,455
Flat 200425177403319€2,075,130€985,185€3,060,315
Flat 200323271373518€2,958,650€1,021,356€3,980,006
Flat 200223760442626€2,505,220€1,666,293€4,171,513
Flat 200131687654023€3,305,032€1,288,234€4,593,265
Flat 200023271362717€2,098,391€832,150€2,930,541
Flat 1999334102594032€1,377,649€639,411€2,017,059
Flat 199842665526647€637,029€686,237€1,323,266

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