Trustpower increased 1.4 percent to $6.38, and its cornerstone shareholder Infratil was up 2.5 percent at $4.035.
Synlait Milk led the market higher, up 5.1 percent at $10.53. The milk processor is bouncing back from a 14 percent slump on Wednesday when it unexpectedly reported a drop in first-half earnings. Air New Zealand rose 4 percent to $2.32 and is another stock that's been under pressure since it issued a profit warning in February.
McIntyre said it looked like investors were using the recent weakness in both companies to buy back in at a cheaper price.
A2 Milk increased 0.7 percent to $13.81 on a smaller volume than usual of 628,000 shares. Fonterra Shareholders' Fund units rose 0.5 percent to $4.22.
Spark New Zealand was the most active stock with volume of 3 million, less than its 5.6 million three-monthly average. It rose 1.1 percent to $3.58.
Sky Network Television increased 0.7 percent to $1.36 on a volume of 1.5 million. It hired a Deloitte partner to fill in as an interim chief financial officer while it finds a permanent replacement for veteran Jason Hollingworth. Separately, ACC's investment arm emerged as a substantial shareholder in the pay-TV operator.
Auckland International Airport increased 0.5 percent to $7.885 on a volume of 1.1 million.
Vector decreased 0.3 percent to $3.55 after it was fined almost $3.6 million for breaching its reliability standards in the 2015 and 2016 regulatory periods.
Summerset Group posted the biggest decline on the day, down 2.4 percent at $6.51.
Wellington International Airport, which is controlled by Infratil, set the interest rate on its $125 million, 11-year bonds at 4 percent. The rate will reset after six years. The notes will list on the NZX debt market.