Certain Common Stock of Eiger BioPharmaceuticals, Inc. are subject to a Lock-Up Agreement Ending on 6-JAN-2019. These Common Stock will be under lockup for 75 days starting from 23-OCT-2018 to 6-JAN-2019. Details: The executive officers and directors have agreed that they will not sell, offer to sell, contract to sell or lend any shares or related securities, enter into any swap, hedge agreement to transfer or dispose of any shares, for a period of 75 days from the date of prospectus supplement without the prior written consent of BTIG, LLC.