05/04/2012 - Closure of the Subscription and Beginning of Debentures Trading in Secondary Market 03/29/2012 - First Private Issue of Debentures - Closing Period of the 1st Apportionment of surplus of debentures and Beginning of the 2nd Apportionment 03/19/2012 - First Private Issue of Debentures - Closing Period of Exercise of Right of First Refusal 03/09/2012 - Unit Price for subscription of Debentures 03/01/2012 - Relationship with Independent Auditors 02/17/2012 - Disclosure of the 4Q11 Results 02/16/2012 - Material Fact - Renewal of approval for purchase of treasury shares 02/16/2012 - Material Fact - Payment of Interest on Own Capital 02/16/2012 - NOTICE TO SHAREHOLDERS 02/08/2012 - NOTICE TO SHAREHOLDERS 01/23/2012 - MATERIAL FACT: Private Issuance of Debentures Convertible into Shares