X0306 4 2020-02-20 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001689392 Kolli Sreelakshmi C/O ALIGN TECHNOLOGY INC. 2820 ORCHARD PARKWAY SAN JOSE CA 95131 0 1 0 0 SVP & Mng Dir Info Tech Common Stock 2020-02-20 4 M 0 14036 0.00 A 20972 D Common Stock 2020-02-20 4 F 0 7563 272.49 D 13409 D Common Stock 1400 I Held jointly with spouse Restricted Stock Unit 0.0001 2020-02-20 4 M 0 1902 0.00 D Common Stock 1902 0 D Restricted Stock Unit 0.0001 2020-02-20 4 M 0 1250 0.00 D Common Stock 1250 1250 D Restricted Stock Unit 0.0001 2020-02-20 4 M 0 400 0.00 D Common Stock 400 800 D Restricted Stock Unit 0.0001 2020-02-20 4 M 0 484 0.00 D Common Stock 484 1451 D Market Stock Unit 0.0001 2020-02-20 4 M 0 10000 0.00 D Common Stock 10000 10000 D Restricted Stock Unit 0.0001 2020-02-20 4 M 0 1811 0.00 A Common Stock 1811 1811 D Market Stock Unit 0.0001 2020-02-20 4 M 0 9193 0.00 A Common Stock 9193 9193 D Includes 10 shares acquired under the ALGN ESPP on January 31, 2020. Represents par value of ALGN common stock. 1/4th of the restricted stock unit granted on February 20, 2016 became vested on February 20, 2020 and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit granted on February 20, 2017 became vested on February 20, 2020 and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit will annually and shares will be delivered to reporting person on each vest date. 1/4th of the restricted stock unit granted on February 20, 2018 became vested on February 20, 2020 and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit will annually and shares will be delivered to reporting person on each vest date. 1/4th of the restricted stock unit granted on February 20, 2019 became vested on February 20, 2020 and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit will continue to vest annually and shares will be delivered to reporting person on each vest date. The market stock unit granted on February 20, 2017 became vested on February 20, 2020 and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit granted on February 20, 2020 will become vested on February 20, 2021 and shares will be delivered to reporting person on such vest date. 1/4th of the restricted stock unit will continue to vest annually and shares will be delivered to reporting person on each vest date. Represents the maximum number of shares which may be issued under the market stock unit. All of the shares which may be issued under the market stock unit will vest on the last day of the third year of the Performance Period (as defined in the market stock unit agreement). Julie Ann Coletti Atty-in-Fact for Sreelakshmi Kolli 2020-02-24