Alder BioPharmaceuticals, Inc. announced that Bob Azelby, Paul Carter, Paul Cleveland, Jeremy Green, Bruce Montgomery, Heather Preston, Clay Siegall and Wendy Yarno each resigned and ceased to be directors of company and members of any committee of Alder’s Board of Directors. These resignations were not a result of any disagreement between Alder and the directors on any matter relating to Alder’s operations, policies or practices.