The current owners bought Somerfield for £1.8bn two years ago. They are now thought to value the 955-strong supermarket chain at £2bn to £2.5bn.
The FT reports that Citigroup is looking to sell the company in one block, but that other retailers are likely to want only pockets of stores.
Members of the Big Four, however, are likely to wait until the outcome of the Competition Commission inquiry into supermarket competition before considering a deal.

