The company currently has two head offices, one in London and the other in Rotterdam, but the Dutch office is likely to be scrapped in the new single structure decision.
Antony Burgmans is likely to be sole chairman of both the UK and Dutch parent companies, while the current co-chairman, Patrick Cescau, is likely to be named as chief executive.
Unilever, whose brands include Wall’s Lipton Iced Tea, Dove and Domestos, issued a profits warning last September and its big acquisition last year of Slimfast has so far not been a big success for the company.
Procter & Gamble’s recent £30bn purchase of Gillette has increased the pressure on Unilever, which has been loosing share to its market rivals for the past few years.
The new management structure is to be announced on Thursday when Unilever releases its full-year results.