Napier Port is due to list on the NZX today at 11.30am after an initial public offer (IPO) raised $234m earlier this month.
The stock will be just the second new equity IPO to list this year after cannabis research company Cannasouth's debut in June.
Cannasouth shares, which listed at 51c, slumped almost immediately. They last traded at 35c.
Napier Port shares were priced at the top of a $2.27-$2.60 indicative range and the issue was "significantly oversubscribed" during the IPO process.
The $234m will be used to pay off debt and to build a new wharf.