Published in The Grocer, Ontario Teachers, Apax, Warburg Pincus and Clayton, Dubilier & Rice are said to be lined up to bid for the company.
Both Warburg Pincus and Ontario Teachers have denied the opportunity to comment on the claims.
It has also been alleged that 2 Sisters Food Group, producer of Foxís Biscuits, would place a bid for Burtonís.
Burtonís has refused to comment on speculation. A spokesperson said: ďInevitably there will be speculation about the identities of bidders, but we wonít be commenting at this stage.Ē
The second-round bidding for Burtonís is reported for the second half of November.
The company confirmed that it was on the market in August for around £350m.The announcement followed months of speculation after Credit Suisse was recruited to look at options earlier this year.
The firm said: ďWe can confirm that a process for the possible sale of Burtonís Biscuit Company will shortly commence. There is no guarantee a sale will take place, and we will provide an update in due course. It is very much business as usual.Ē