Horse of the Year organiser Kevin Hansen is quitting the event he has managed for the past 18 years in the wake of a surprise decision last month to tender out the running of the high-profile Hastings show.
Mr Hansen had previously said he would put in a bid to continue managing the event after this year's show.
But in a statement yesterday he said after "lengthy consideration" he and his son Andrew, who has also been involved in running the event, would not take part in the tender. Instead they would "focus on new opportunities" after their contract ended following next month's event.
"Rather than go into this process it is better business practice for us to develop other event opportunities with our new Australian business partners, on both sides of the Tasman," Mr Hansen said.
Last year the Hansens' company Event Pro merged with a similar Australian-based business, Equine Productions, and Mr Hansen said he planned to move to Sydney in April, although at that stage still intended running Horse of the Year if the opportunity was available.