The BBC reports that Eddie Stobart has suspended trading of its shares and announced that chief executive Alex Laffey will stand down with immediate effect, as the firm looks into an accounting error.
The transport logistics company revealed a £2m discrepancy in its accounts last month.
Sebastien Desreumaux, currently head of iForce, will take over from Mr Laffey.
A review of its statements by new chief financial officer, Anoop Kangits, found that the 2018 adjusted operating profit figure of £55.3m was overstated by about 4%.
Publication of the firm's financial results for the six months to 31 May 2019 has now been delayed to early September.
The firm added that half year profits were likely to be "significantly lower" than suggested in a recent trading update, and that it is "applying a more prudent approach to revenue recognition".
Ironically the company's largest shareholder is troubled fund manager Neil Woodford, who holds a 22.9% stake.