MediaWorks Radio has remained the number one network in every major market in the first radio survey of 2016.
For the first time, MediaWorks secured more than 1 million listeners in the weekday breakfast timeslot.
The survey showed a total commercial audience increase of nearly a quarter of a million listeners, with 183,500 of those being MediaWorks listeners.
Results highlights included:
Wendy Palmer, CEO of MediaWorks Radio, said: "Our brands and amazing presenters continue to deliver the biggest and best audiences. The highlights are too numerous to list, but with our network securing more than one million listeners in breakfast, it's clear our strategy in this area has been successful. "
The survey was the first carried out by European research company GfK after the Radio Broadcasters Association ended its relationship with TNS New Zealand last year.