Supply chain optimization, company interdependency and the establishment of global operating networks have all made companies more susceptible to uncertainty and risk. Literature on the subject lacks analysis of how companies have implemented these systems and what the results have been. This paper describes the implementation of Enterprise Risk Management (ERM) in three Brazilian world-class companies and evaluates the hindrances and facilitating factors. It also considers the results achieved in performance and company culture. Finally, we propose a model associating the benefits of risk management to the level of organizational transformation.