X0306 4 2020-05-20 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001730784 Dallas Kevin J C/O ALIGN TECHNOLOGY INC. 2820 ORCHARD PARKWAY SAN JOSE CA 95134 1 0 0 0 Restricted Stock Unit 0.0001 2020-05-20 4 A 0 1271 0.00 A Common Stock 1271 1271 D Represents par value of ALGN common stock. 100% of the restricted stock unit granted on May 20, 2020 will become vested on the earlier of (i) May 20, 2021 or (i) the date of the 2021 annual meeting of stockholders. Shares will be delivered to reporting person on the vest date. /s/Julie Ann Coletti Attorney-in-Fact for Kevin J Dallas 2020-05-21