Chair Andrew Ferrier told shareholders he was bitterly disappointed that Orion hadn't delivered on its potential, but that this was the best option for investors.
Before the vote, the New Zealand Shareholders' Association said it would support the resolutions, but was very disappointed with the outcome for shareholders.
Orion founder Ian McCrae told shareholders the company's performance had been a "major disappointment" and hasn't delivered for investors.
The future of the NZX listing for the remaining business will depend on how many shareholders decide to stick with the firm, he said.
"If only 5 per cent decide to stay in then that's a different situation to if everyone wants to stay in," he said.
McCrae's interests will sell 20 per cent of their stake in the buyback. His final holding will depend on the level of uptake by other investors, ranging from 44.2 per cent if no-one participates to 100 per cent if everyone does.
- BusinessDesk