Certain Stock Options of Idera Pharmaceuticals, Inc. are subject to a Lock-Up Agreement Ending on 23-JAN-2018. These Stock Options will be under lockup for 90 days starting from 25-OCT-2017 to 23-JAN-2018. Details: The officers and directors of the company, the former director, Youssef El Zein, and the Pillar Investment Entities have agreed with the underwriters, subject to certain exceptions, not to dispose of or hedge any of their common stock or securities convertible into or exchangeable for shares of common stock during the period from the date of this prospectus supplement continuing through the date 90 days after the date of this prospectus supplement, except with the prior written consent of J.P. Morgan Securities LLC, Goldman Sachs & Co. LLC and Barclays Capital Inc.