Michael Klein was born in Brazil. Michael Klein's father Samuel Klein survived a concentration camp in Auschwitz and went on to build Brazilian retail giant Casas Bahia. Michael, who joined the family business in 1969 as a financial manager, orchestrated the merger of Casas Bahia with Ponto Frio, within holding company Via Varejo. In 2013 Via Varejo raised $1.2 billion through a public offering. The transaction afforded Michael and his family the opportunity to cash out amidst a dispute with their partners. Michael is Via Varejo's largest individual shareholder. His eldest daughter, Natalie Klein, is the owner of NK Store, one of Brazil's most exclusive department stores.