Certain Common Stock of Krystal Biotech, Inc. are subject to a Lock-Up Agreement Ending on 3-MAY-2021. These Common Stock will be under lockup for 90 days starting from 2-FEB-2021 to 3-MAY-2021. Details: Directors and executive officers have entered into lock-up agreements with the representatives prior to the commencement of this offering pursuant to which they have agreed for a period of 90 days, without the prior written consent of the representatives and subject to certain limited exceptions, not to (i) offer, sell, contract to sell, pledge, grant any option to purchase, lend or otherwise dispose of any shares of common stock, or any options or warrants to purchase any shares of common stock, or any securities convertible into, exchangeable for or that represent the right to receive shares of company's common stock