Coolmore has bought a controlling interest in Golden Slipper winner Vancouver in a deal reported to value the colt at $40 million.

Trained by Gai Waterhouse, Vancouver is unbeaten in four starts and his previous owners will continue to race him in conjunction with Coolmore Stud and its partners which include the China Horse Club, Ramsey Pastoral and Peters Investments.

"There was obviously a massive amount of interest in the horse so we are delighted to have secured him," Coolmore's Tom Magnier said.

"He's a brilliant colt and we and our partners couldn't be more excited about his future.

"Vancouver, along with another of our recent investments, Pride Of Dubai, serve to illustrate the long-term commitment of Coolmore to the Australian breeding industry."

Pride Of Dubai, trained by Peter and Paul Snowden, won the Blue Diamond Stakes and is favourite to add another Group One race to his record in Saturday's ATC Sires' Produce Stakes at Randwick.

Vancouver will be rested until the spring with the Cox Plate among Waterhouse's ambitions.