The event is organised by Tourism Industry Aotearoa which says demand from both buyers and sellers to attend this year's event had been extremely high and the event is at capacity.
"That high interest reflects the buoyancy of New Zealand's tourism industry which is enjoying record growth," said chief executive Chris Roberts.
The deals they made and relationships built generated tens of millions of dollars' worth of new tourism business for the New Zealand economy.
"These buyers are the most influential in terms of sending visitors to New Zealand. They are coming to Trenz to meet with 300 of the country's leading tourism operators and will be seeking new and exciting tourism products and experiences they can sell to consumers in their home markets,
Auckland Tourism, Events & Economic Development says the event will generate an estimated $2m for the Auckland economy.
"Auckland benefits from the immediate economic impacts of having the people attending Trenz staying in accommodation, eating in restaurants and experiencing some of Auckland's tourism activities," said Ateed's head of tourism Jason Hill.
Auckland Airport runs a summit on Tuesday in advance of Trenz where airline growth trends are outlined. Former TIA chief Martin Snedden is also speaking at the event.