X0306 4 2020-06-15 0001581280 Twist Bioscience Corp TWST 0001753672 Green Paula C/O TWIST BIOSCIENCE CORPORATION 681 GATEWAY BLVD. SOUTH SAN FRANCISCO CA 94080 false true false false VP of Human Resources Common Stock 2020-06-15 4 M false 16833 5.95 A 39448 D Common Stock 2020-06-15 4 S false 16833 38.0000 D 22615 D Employee Stock Option (right to buy) 5.95 2020-06-15 4 M false 16833 0 D 2026-03-21 Common Stock 16833 35686 D The option is immediately exercisable. 25% of the shares subject to the option vested on March 21, 2017 and 1/48th of the shares subject to the option vest on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date. /s/ William Solis, as Attorney-in-Fact for Paula Green 2020-06-17