KPMG SA (Switzerland) has been the lead auditor since 2009, providing group with a voluntary external audit opinion on the consolidated accounts. KPMG Accountants NV are the statutory auditors of NV (since the financial year 2013).

The consolidated financial statements of group and its consolidated subsidiaries for each of the years ending December 31, 2013, 2012 and 2011 have been audited by KPMG SA (Switzerland), independent auditors.