Certain Restricted Stock Units of Alector, Inc. are subject to a Lock-Up Agreement Ending on 17-APR-2024. These Restricted Stock Units will be under lockup for 91 days starting from 17-JAN-2024 to 17-APR-2024.

Details:
Directors and executive officers have agreed that, without the prior written consent of Cantor Fitzgerald & Co., they will not, during the period ending on and including the 90th day after the date of this prospectus supplement 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: or directly or indirectly, any shares of common stock or any securities convertible into or exercisable or exchangeable for shares of common stock; or file any registration statement with the SEC relating to the offering of any shares of common stock or any securities convertible into or exercisable or exchangeable for common stock.