Eiger BioPharmaceuticals Class Action Lawsuit Submission Form

(i) defendants overstated Eiger’s clinical and regulatory drug development expertise; (ii) defendants failed to properly assess, and/or ignored issues with, the design of the TOGETHER study and its ability to support the Emergency Use Authorization (“EUA”) for the Company’s product candidate, peginterferon lambda ; (iii) there were issues with the conduct of the TOGETHER study and/or the TOGETHER study was not properly designed for the peginterferon lambda EUA in the current context of the pandemic; (iv) as a result, the U.S. Food and Drug Administration was unlikely to approve the submission of a peginterferon lambda EUA; (v) as a result of all the foregoing, peginterferon lambda’s regulatory and commercial prospects for the treatment of COVID-19 were overstated; and (vi) as a result, the Company’s public statements were materially false and misleading at all relevant times.