The company said two resolutions were passed at a special meeting yesterday in Hawera.
The hurdle for approval was 50%.
The exact voting numbers will be released later.
Craigs Investment Partners broker Chris Timms said he expected the Allied shareholders to be the hardest ones to convince in the process.
"They must have presented it well."
The meeting passed a resolution to approve the purchase by Allied Farmers Investments of the finance assets of Hanover Finance and United Finance and a resolution to issue new Allied Farmers' shares as consideration.
The deal is worth around $400 million.
It also needs the approval of 75% of investors in Hanover.
That vote is on December 16.
The deal's promoters have been on a roadshow around the country presenting to investors.
Hanover investors are paid in shares and end up owning most of Allied Farmers' shares.
They receive shares to the equivalent of 72c in the dollar, having been paid 6c in the dollar under a moratorium.
Hanover Finance debenture holders are currently forecast to receive 70c in the dollar if the moratorium is allowed to continue.
Mr Timms said Hanover investors would be foolish to not vote for the offer, even though it changed them from investors in debt to holding equity.
"At least this way they can get some liquidity to their investments. It's the best on offer now. The worst case would be Hanover going into receivership and the receivers having a fire sale."
When the Hanover investors were issued with shares, Mr Timms expected a lot of them to sell as soon as possible, to get some of their money back.
About 250 people attended the Hanover meeting in Wellington on Monday, the third of 10 investor meetings around the country pushing the benefits of the deal.
While some poured scorn on Hanover, most were there to listen to the proposal.
One investor said Hanover directors should "do the decent thing" and put the company into receivership.
Another was concerned over the status of first ranking debenture holders, who would have no similar position with Allied Farmers' shares.
"Your track record in protecting the interests of secured investors hardly inspires confidence in the recommendations you now make. It is reminiscent of revolving doors and smoke and mirrors syndrome."
NZPA reported that one elderly woman slammed Hanover and its co-founder Mark Hotchin for not allowing her to withdraw her money last year when her husband needed treatment in America for cancer.
"How callous. You deserve to rot, and I hope you never have a family member go through what I have had to go through."
"We have been taken to the cleaners by one organisation. What's to say we can't be taken to the cleaners by another?" another said.
Mr Hotchin, target of investor rage over Hanover's failure while still personally being able to hang on to a multimillion-dollar property basket, urged investors to look forward, rather than backwards.
