X0306 4 2022-09-16 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 SVP of Human Resources Common Stock 2022-09-16 4 M false 8514 5.95 A 22610 D Common Stock 2022-09-16 4 S false 8514 37.4302 D 14199 D Employee Stock Option (right to buy) 5.95 2022-09-16 4 M false 8514 0 D 2026-03-21 Common Stock 8514 0 D Represents the weighted average sales price per share. The shares sold at prices ranging from $37.41 to $37.47 per share. Full information regarding the number of shares sold at each price shall be provided upon request to the staff of the U.S. Securities and Exchange Commission, the Issuer, or a security holder of the Issuer. Includes shares that were acquired under the Issuer's Employee Stock Purchase Plan in a transaction that was exempt under both Rule 16b-3(d) and Rule 16b-3(c). The option is immediately exercisable. 25% of the shares subject to the option vested on September 1, 2016 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/ Alyssa Zhang, as Attorney-in-Fact for Paula Green 2022-09-20