The company said that the transaction will increase its market share in the country to 31% and its volume to 6m hectolitres.
Financial details of the acquisition, which will be "funded from existing cash resources," were not disclosed. Heineken said the deal will enhance earnings next year and value in 2012. The proposed acquisition is subject to approval by the Romanian competition authority, the company said.
Bere Mures, which is based in Transylvania, saw sales volumes last year of 1.2m hectolitres from a production capacity of 1.6m hectolitres. The brewer has a beer portfolio which includes Neumarkt, Dracula and Sovata brands as well as two mineral water brands, Cezara sparkling and Cheile Cibului still.
Heineken Central and Eastern Europe regional president Nico Nusmeier said: "This transaction enables us to consolidate our leading position in Romania. It creates a stronger, more diversified portfolio of leading brands and an excellent platform on which to build further value and growth."
Heineken currently owns four breweries in Romania: in Constanta, Craiova, Hateg and Miercurea Ciuc. The brand portfolio consists of Heineken, Ciuc, Golden Brau, Bucegi, Gösser and a limited number of regional brands. Heineken Romania has a market share of approximately 26%.