AmBev has extended the period of its offer to buy the remaining shares in Argentina-based brewer Quinsa.

Belgium-based brewing giant InBev, which owns AmBev, announced the extension of the offer today (27 February).

InBev, the world's largest beer maker by volume, said the offer period was being extended to give shareholders the opportunity to review Quinsa's annual results, which will be published this week.

Earlier this month, a minority investor in Quinsa complained to the company over AmBev's plans to snaffle up the shares. Private equity firm Duma Capital Partners said that it was not satisfied with the handling of AmBev's offer to outstanding shareholders.

The offer has been made through Beverage Associates Holding, a Bahamian corporation and a wholly-owned subsidiary of AmBev.

AmBev already owns around 97% of the voting interests and around 91% of the economic interests in Quinsa.