This book explores actions to set aside under stock corporation law by studying the legal problems connected with the right to challenge such measures, including by looking into practical cases. By means of an empirical survey, the author subsequently analyses how the action to set structural measures aside has developed since the last legislative reform. Furthermore, the author casts a glance at legal protection against structural measures in Slovakia, Austria, Italy, Spain and the USA, making proposals for the German legislator as to how to modify the shareholder's right to challenge structural measures. This will give much needed clarity to a complex question of corporation law, making it essential reading for practitioner in the field.