The waste disposal company has managed to avoid pulling its IPO after drumming up enough City interest on Friday.
City A.M. understands Biffa is set to announce the flotation is going ahead on Monday.
It is expected to list on the London Stock Exchange on Thursday with a share price of 180p.
This was reduced from 220p after the company failed to attract enough City interest.
It means Biffa will raise just over £210m from the float, below the initial target of £270m, valuing the company at around £450m.
A source close to Biffa told City A.M. that investors were keen on the company but required a lower price because of the current state of the market.
In more bad news for the London flotation market, it emerged yesterday that Mountain Warehouse has withdrawn its plans for an IPO.
Meanwhile, Krispy Kreme’s intended float was ruled out earlier this month when the UK arm was sold to the US business instead.