The port's shares fell 0.6 percent to $3.17 on the NZX and have gained 39 percent in the past year. The stock is tightly held with Christchurch City Holdings, the investment arm of the council, owning about 80 percent of the company, while Port Otago holds 15 percent.
RMTU said port management didn't want to set a precedent for negotiations for a wider collective agreement which covers over 400 port workers. Negotiations have been ongoing since before Christmas with the union arguing the increase would only cost the company $10,000 and it has set a precedent by giving Davie himself a pay rise.
Davie's remuneration rose 2.5 percent last financial year to $1.05 million, according to the port's annual report. He says his own pay is "irrelevant" to the industrial dispute.
"If they want to ask what workers around the country have gained, the average wage increase is not 4 percent, it's a lot lower than that, I can guarantee them that," Davie said. "I think the union needs to start being realistic in their demands."
"There hasn't been any negotiation, it's just been a demand - we want this or else. We don't think that's a negotiation quite frankly," he said.
In February the port resumed dividend payments for the first time since they were suspended in 2010 following damage sustained in the Canterbury earthquakes. The company had a $438.3 million settlement with Vero, NZI and QBE, of which it recognised $357.6 million in insurance income in the six months ended Dec. 31, 2013.