The action follows the move by investors last week to buy the management from CBA.
"The trading halt has been put in place pending the release of a material announcement," Kiwi announced earlier this morning.
The business owns real estate around New Zealand valued at $2.1 billion, making it one of the biggest NZX entities.
CBA also owns a big stake in Kiwi and is understood to be keen to sell its units.
On Friday, Kiwi issued a statement announcing its internalisation was settled.
"The trust is managed by Kiwi Property Management Limited (formerly named Kiwi Property Management (NZ) Limited), a newly established company controlled by unit holders. Existing staff have now commenced employment with the new manager," said a joint statement from chief executive Chris Gudgeon and investor relations and communications manager Mathew Chandler.
"The net internalisation payment of $70.5 million (plus GST where applicable) has been funded through the trust's committed bank debt facilities, which have been increased by $25 million to $875 million," they said.