Autographs of Aidan O'Brien

Aidan Patrick O'Brien (born 16 October 1969 in County Wexford, Ireland) is an Irish horse racing trainer. Since 1996, he has been the private trainer at Ballydoyle Stables near Rosegreen in County Tipperary for John Magnier and his Coolmore Stud associates. He is widely acknowledged as one of the greatest horse racing trainers of all time.
Aidan O'Brien was one of six children of Denis O'Brien (died 1 December 2008) and his wife Stella (née Doyle). Denis was a farmer and small-scale horse trainer in the townland of Killegney, near Poulpeasty, in County Wexford, where Aidan grew up.
Aidan O'Brien attended Donard National School, located less than a mile from his parents' home. He subsequently attended secondary school at Good Counsel College, New Ross, also located in County Wexford. O'Brien is a member of the Pioneer Total Abstinence Association, meaning that he does not drink alcohol.
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Traded items with a signature of Aidan O'Brien

The most expensive item with a signature of Aidan O'Brien (ISTABRAQ Charlie Swan & Aidan O'Brien Champion Hurdler Large Framed Signed Print) was sold in April 2025 for £78.71 while the cheapest item (SALE AIDAN O'BRIEN MILLWALL HAND SIGNED PHOTO AUTHENTIC GENUINE + COA - 12x8) found a new owner for £0.99 in December 2018. The month with the most items sold (5) was July 2025 with an average selling price of £24.99 for an autographed item of Aidan O'Brien. Sold items reached their highest average selling price in April 2025 with £78.71 and the month that saw the lowest prices with £1.00 was January 2019. In average, an autographed item from Aidan O'Brien is worth £15.00.

Most recently, these items with a signature of Aidan O'Brien were sold on eBay - click here for more items.

Picture	Item Title	Price	Store
	AIDAN O'BRIEN IRISH HORSERACING LEGEND HAND-SIGNED YEATS PHOTOCARD	£44.95
	Aidan O'Brien Signed Horse Racing Ticket August Rodin Japan Cup Souvenir	£60.50
	Aidan O'Brien Trainer Autograph Signed Colored Paper 21x18.5cm Japan Cup	£63.08
	AIDAN O'BRIEN/DERMOT WELD/JOHN OXX HORSERACING LEGENDS HAND-SIGNED STAMP COVER	£49.95
	AIDAN O'BRIEN/MICK KINANE HORSERACING LEGENDS HAND-SIGNED GALLILEO PHOTO FOLDER	£59.95
	Horse Racing - Aidan O'Brien - Hand Signed 12x8 Inch Photograph -COA	£24.99
	Horse Racing - Aidan O'Brien - Hand Signed 12x8 Inch Photograph -COA	£24.99
	Horse Racing - Aidan O'Brien - Hand Signed 12x8 Inch Photograph -COA	£24.99
	Horse Racing - Aidan O'Brien - Hand Signed A4 Photograph - COA	£20.00
	Horse Racing - Aidan O'Brien - Hand Signed A4 Photograph - COA	£25.00
	Horse Racing -Ryan Moore & Aidan O'Brien- Hand Signed 12x8 Inch Photograph - COA	£35.00
	ISTABRAQ Charlie Swan & Aidan O'Brien Champion Hurdler Large Framed Signed Print	£78.71
	Joseph & Aidan O'Brien horse racing jockey Genuine Hand Signed 12 X 8 Photo	£15.00
	Wayne Lordan & Aidan O'Brien - Hand Signed A4 Photograph - Epsom Derby 2025-COA	£39.99
	Wayne Lordan & Aidan O'Brien - Hand Signed A4 Photograph - Epsom Derby 2025-COA	£39.99