Energy minerals shares gained the most on New Zealand's Exchange, rising nearly 1% by midday Wednesday.

Shares of Channel Infrastructure (NZE:CHI, ASX:CHI) rose almost 1% in recent trade.

The company's two refurbished tanks at Northland's Marsden Point, which will store New Zealand's strategic diesel supply, are officially in use, following an event attended by Prime Minister Christopher Luxon and senior government ministers to mark the completion and recommissioning of the tanks, according to a Tuesday government statement.

Meanwhile, consumer non-durables sector shares fell past 2%.

a2 Milk Company (NZE:ATM, ASX:A2M) was down 5% in recent trade.

The company on Tuesday said China infant milk formula supply disruptions weighed heavily on fourth-quarter sales, with fiscal 2026 China label infant milk formula sales declining about 14% year on year amid demand surges, freight challenges, production delays, and regulatory changes.