Napier Port in Zealand is eyeing expansion with an IPO worth between NZD 204m and NZD 234m ($158m).
It is selling 45% of the company in an expected range of NZD 2.27 to NZD 2.60 per share.
The stock will list on the NZX on 20 August, Stuff reported.
Bookbuilding will be run by Deutsche Craigs and Goldman Sachs on 6 and 7 August.
Chief executive Todd Dawson said the cash would allow it built a new 350-metre wharf to welcome bigger boxships and cruiseships.