I believe that Alaistair Petrie is the merely the NZ representative of the Ecuadorian Alvaro Noboa family, the people behind Bonita bananas. If you look at the biography of Alvaro Noboa.
https://www.alvaronoboa.com/en/biography/
it still says he has interests in New Zealand. Bartel Holdings was a significant shareholder in the old 'Turners Auctions' company, which when taken over by Dorchester, became the Turners business we know today. I know some of the public shareholding information says that Alaistair Petrie is the 100% shareholder of Bartel.
https://app.companiesoffice.govt.nz/.../shareholdings
But I think that is only in the sense that Petrie is the local nominee of the Alvaro Noboa family. Petrie took over this job from Michael Dossor who died in 2016. I don't recall any information on the Ecuadorians selling out since then. And being a shareholder from the Turners Auction days, I think I would remember if it had happened.