The market leader is BRF (Brazil Foods) the result of the merger of Sadia and Perdigão with a market share of 25% of integrated pigs, followed by Aurora with 9%, Marfrig 6%, Alibem 4%, Riosulense 3%, Doux-Frangosul 2% (rumoured wanting to exit pigs) and Frimesa 2%.
http://www.bpex.org.uk/downloads/299522/295093/BPEX%20Export%20report%20wk%2051.pdf