Certain Stock Options of Calyxt, Inc. are subject to a Lock-Up Agreement Ending on 16-JAN-2018. These Stock Options will be under lockup for 181 days starting from 19-JUL-2017 to 16-JAN-2018. Details: The directors, executive officers, Cellectis S.A., and other security holders have entered into a lock up agreement pursuant to which, they will not offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, or otherwise transfer or dispose of, directly or indirectly, or enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of any shares of common stock or any securities convertible into or exercisable or exchangeable for shares of common stock, for a period of 180 days from the date of the prospectus, without the prior written consent of the representatives of the underwriters.