The auditor of Sika AG is elected by the Annual General Meeting for a term of one year. In 2017, Ernst & YoungAG, listed as auditor in the commercial register since February 7, 1995, served in this capacity. The auditor participates regularly in the meetings of the Audit Committee, providing oral and written reports on the results of its reviews. In 2017, the auditor participated in three meetings of the Audit Committee.

The Audit Committee checks and evaluates the auditor and makes recommendations to the Board ofDirectors. For further information regarding reporting andcontrol of the auditor reference is made to the 5th chapter of Organizational Rules of Sika AG and the Sika Group (available at https://www.sika.com/en/group/investors/corporate-governance/organizational-rules.html). The independence of the auditor is ensured by various measures. The Audit Committee has defined a percentage threshold for non-audit services in relation to the audit services. In addition, services outside the audit which individually exceed CHF100,000 are subject to prior approval by the chairman of the Audit Committee.

As part of its reporting for the consolidated and statutory financial statements, the auditor confirms its independence vis-à-vis Sika AG. In accordance with legal requirements, the lead auditor is replaced after a maximum period of seven years. The current lead auditor has been responsible for the audit mandate since 2015. As set out in the 5th chapter of the Organizational Rules of Sika AG and the Sika Group (available at https://www.sika.com/en/group/investors/corporate-governance/organizational-rules/audit-committee-ac.html), the Audit Committee reviews any potential conflicts between the audit and non-audit services of the auditor. The performance of the auditor is evaluated by the Audit Committee as well as by employees of Sika who are in regular contact with the auditor.

The assessment is based on criteria such as the professional expertise and know-how, the understanding of the corporate structure and company-specific risks, comprehensibility of the audit strategy proposed by the auditor and diligence in the implementation of the proposed audit strategy as well as the coordination of the auditor with the Audit Committee and the finance department of the Sika Group. In addition, the Audit Committee reviews the results of the audit, particularly the audit report for the consolidated annual financial statements and the interim financial statements.The budget for the audit fees is proposed by the CFO and approved by the Audit Committee. During the year under review, Ernst & Young AG invoiced in total CHF 4.8 million for its services. Thereof, CHF 3.9 million related to audit services, which included the audit of the statutory financial statements of Sika AG and of practically all subsidiaries as well as the audit of the consolidated financial statements.

Ernst & Young AG received additional fees totaling CHF 0.8 million for tax consultancy and CHF 0.1 million for additional services. These additional services related to legal advise in connection with local compliance requirements, the merger of two local subsidiaries and legal services in connection with employment law matters.