The action to set aside is considered a protective instrument for shareholders in case of structural measures carried out by German stock corporations. This shareholder right has fallen into disrepute since 2005. At that time, shareholders started to exercise this right excessively because of the introduction of the squeeze-out. In 2009, the legislator therefore limited the action’s control function substantially. The question arises whether the right to fi le actions to set structural measures aside must undergo reform. This book explores the issue by studying legal problems connected with the right to challenge such measures, including by looking into practical cases.