Shares of energy minerals firms gained the most on the New Zealand's Exchange, rising past 2% by midday Wednesday.

Channel Infrastructure NZ (NZE:CHI) shares rose past 2% in recent trade after it said on Tuesday that it's "well positioned" to meet any additional stockholding requirements in line with the government's minimum supply obligation for diesel importers.

On the other hand, utilities shares dropped nearly 1%.

Meridian Energy's (NZE:MEL, ASX:MEZ) shares slid almost 3% in recent trade as the company's retail sales volumes declined 3.1% year on year to 786 gigawatt hours (GWh) in March from 811 GWh a year earlier.