By Rogerio Jelmayer 
 

SAO PAULO--The family of Brazilian billionaire Abilio Diniz sold a total of 1.2 billion Brazilian reais ($543 million) in shares of the country's largest retailer in terms of revenue, Companhia Brasileira de Distribuicao (PCAR4.BR), or CBD.

Mr. Diniz family sold a lot of 11.49 million shares of CBD on the Sao Paulo stock exchange during Monday's session, the exchange said. In May, Mr. Diniz sold another portion of his shares in CBD for BRL825 million.

After the sale, the Diniz family still holds a total of 4 million shares of CBD, according to local media. CBD's shares closed Monday down 2.08% at BRL103.90.

In June 2012, French retailer Groupe Casino (CO.FR) took control of CBD, after a fierce dispute between Mr. Diniz, then the chairman of CBD, and Casino's CEO and owner, Jean-Charles Naouri.

Mr. Diniz and Mr. Naouri have had open conflicts in recent years after Mr. Diniz attempted to back out of a 2005 deal to hand over the control of GPA, founded by his family. The relationship between both businessmen deteriorated even more after Mr. Diniz attempted in 2011 to merge CBD with the Brazilian unit of Casino's rival in France, Carrefour SA (CRRFY, CA.FR).

In September 2013, Mr. Diniz step down as chairman of the CBD and a few days later was elected the chairman of Brazilian food company BRF Brasil Foods SA.

Write to Rogerio Jelmayer at rogerio.jelmayer@wsj.com