Group One-winning sprinter Shamexpress has been retired and will stand at Windsor Park Stud in New Zealand this spring.

The New Zealand-bred stallion's biggest win came in last year's Group One Newmarket Handicap at Flemington as a three-year-old.

He was placed another three times at Group One level for Flemington trainer Danny O'Brien including runner-up performances in this season's VRC Sprint Classic and the Lightning Stakes at weight-for-age.

The four-year-old son of O'Reilly won three of his 19 starts, amassing more than $1 million prize money in a career which included a 2013 northern hemisphere campaign.

He was unplaced in the King's Stand Stakes at Royal Ascot and the July Cup at Newmarket.

Windsor Park co-owners Nelson and Rodney Schick inspected Shamexpress last week before announcing they had secured the stallion for a syndicate headed by the stud.

"After viewing Shamexpress I could not be more excited about him," Rodney Schick said in a statement.

"He's a beast of a stallion with the physique and strong genetic profile necessary to be a success."

Shamexpress will stand his first season at a fee of $NZ16,000 plus GST.

He is the second Group One star to leave O'Brien this autumn with Cox Plate winner Shamus Award also retired to stand at Widden Stud in the NSW Hunter Valley.