Other annual meetings tomorrow include Turners Automotive Group, which gained 1.8 per cent to $2.90, and NZ Windfarms, which was unchanged 12.3 cents.
Mercury NZ gained 1.5 per cent to $3.365 ahead of its Friday AGM. Future Mobility Solutions was unchanged at 11.6 cents ahead of its meeting on the same day.
Orion Health Group also holds its annual meeting on Friday where shareholders will vote on whether to back a restructuring of the group into three distinct firms. The shares rose 5 per cent to $1.06.
Williamson said the software developer has been "pretty badly managed" since it listed in 2014. Shareholders will probably lose value on the stock once the transaction is completed.
A2 Milk Co fell 0.3 per cent to $11.80. The stock was added to the FTSE index last week, but the sale of shares by CEO Jayne Hrdlicka to cover a tax bill caused some dismay among investors. Williamson said the share sale showed poor judgement.
"It's not what investors wanted to see from the head of the company," he said.
Port of Tauranga led the benchmark index higher, rising 2.8 per cent to $5.20, followed by Restaurant Brands New Zealand, up 1.9 per cent to $7.70.
Sky Network Television fell 2.2 per cent to $2.20, the biggest decline on the day, while Chorus slipped 1.8 per cent to $4.76.
NZME fell 1.5 per cent to 67 cents after the Court of Appeal upheld earlier rulings rejecting a planned merger with rival Stuff.
New Zealand Oil & Gas increased 0.9 per cent to 58 cents after it started drilling an exploration well near New Plymouth. Contact Energy gained 1 per cent to $5.88 after announcing former Ministry of Business, Innovation and Employment chief David Smol will join its board next month.
Among blue chip stocks, Meridian Energy increased 1.2 per cent to $3.37, Spark New Zealand advanced 0.5 per cent to $4.02, Auckland International Airport gained 0.4 per cent to $7.45, Mainfreight fell 0.4 per cent to $29.82 and Fisher & Paykel Healthcare declined 0.8 per cent to $7.25. Fletcher Building was unchanged at $6.35.