Certain Common Stock of Editas Medicine, Inc. are subject to a Lock-Up Agreement Ending on 21-APR-2021. These Common Stock will be under lockup for 91 days starting from 20-JAN-2021 to 21-APR-2021. Details: The company’s executive officers and directors have agreed that, without the prior written consent of J.P. Morgan Securities LLC and Morgan Stanley & Co. LLC, they will not, subject to limited exceptions, during the period ending 90 days after the date of this prospectus, or the restricted period, 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, lend, or otherwise transfer or dispose of, directly or indirectly, any shares of common stock beneficially owned by them or any other securities so owned convertible into or exercisable or exchangeable for common stock, enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the common stock, or publicly disclose the intention to make any such offer, pledge, sale, contract, purchase, grant, loan, transfer, or disposition, or enter into any such swap or other arrangement.