Te Kiwai Mauī o Ngāruahine (Mauī) is the standalone commercial entity who is accountable to Te Korowai o Ngaruahine Trust. Its purpose is to grow the treaty settlement assets by investing in commercial activities that generate a healthy return for Te Korowai.

Many of their investments have a longterm outlook and purchasing the Dawson Falls Lodge in 2016 is one example of this. Mauī is also responsible for the Iwi fisheries quota that provides pataka for Ngāruahine kaupapa.

Mauī has four Directors. They are: