Walter Grüebler has withdrawn his challenge action against the resolution of the annual general shareholders' meeting of April 14, 2015, to hold an extraordinary shareholders' meeting (see press release of June 11, 2015). As a result the Cantonal Court of Zug terminated the proceedings in its decision of November 12, 2015.

Walter Grüebler remains involved as so called intervenor in the pending challenge proceedings between Schenker-Winkler Holding AG (SWH) as claimant and Sika AG as defendant. These proceedings concern the restriction of the voting rights of SWH in the shareholders' meeting of April 14, 2015. A challenge of SWH against certain resolutions of the extraordinary shareholders' meeting  of July 24, 2015, is also pending.