Dairy Holdings chairman Greg Gent said he was unable to comment immediately.
Dairy Holdings is the biggest shareholder in Fonterra, with more than $1 billion of assets.
The Ashburton-based company has 75 dairy and grazing properties in the South Island, and its 50,000-plus cows yield more than 17 million kilograms of milk solids a year.
Companies Office records show Jagewi sold 556,709 shares in Dairy Holdings.
These were taken up equally by existing shareholders Pure Pasture Investments, majority owned by the Tauranga-based Armers, and Turdair 2019 Ltd, majority-owned by the Turleys, large-scale potato and arable growers from Temuka.
Just over 399,000 shares were allocated to Sooke Investments. It is not known how much the stake cost.
John Luxton of sold-up shareholder Jagewi Ltd told the Herald he had had interests in Dairy Holdings since 1993 and the time had come for Jagewi shareholders "to move on".
The Waikato dairy farms owner and former National Party Cabinet minister said the sale "allowed each of us an opportunity to consolidate our separate business interests".
"We were pleased with it."