X0306 4 2018-02-20 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001689392 Kolli Sreelakshmi C/O ALIGN TECHNOLOGY INC. 2560 ORCHARD PARKWAY SAN JOSE CA 95131 0 1 0 0 SVP, Info Technology Common Stock 2018-02-20 4 M 0 7042 0.00 A 31348 D Common Stock 2018-02-20 4 F 0 3168 255.45 D 28180 D Common Stock 1400 I Held jointly with Spouse Restricted Stock Unit 0.0001 2018-02-20 4 M 0 2070 0.00 D Common Stock 2070 0 D Restricted Stock Unit 0.0001 2018-02-20 4 M 0 1820 0.00 D Common Stock 1820 1820 D Restricted Stock Unit 0.0001 2018-02-20 4 M 0 1902 0.00 D Common Stock 1902 3804 D Restricted Stock Unit 0.0001 2018-02-20 4 M 0 1250 0.00 D Common Stock 1250 3750 D Restricted Stock Unit 0.0001 2018-02-20 4 A 0 1600 0.00 A Common Stock 1600 1600 D Market Stock Unit 0.0001 2018-02-20 4 A 0 7750 0.00 A Common Stock 7750 7750 D Includes 257 shares acquired under the ALGN ESPP on January 31, 2018. Held jointly with spouse. Represents par value of ALGN common stock. 1/4th of the restricted stock unit granted on February 20, 2014 became vested on February 20, 2018 and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit granted on February 20, 2015 became vested on February 20, 2018 and shares were delivered to reporting person on such vest date. The restricted stock unit will continue to vest annually and shares will be delivered to reporting person on each vest date. 1/4th of the restricted stock unit granted on February 20, 2016 became vested on February 20, 2018 and shares were delivered to reporting person on such vest date. The restricted stock unit will continue to vest annually and shares will be delivered to reporting person on each vest date. 1/4th of the restricted stock unit granted on February 20, 2017 became vested on February 20, 2018 and shares were delivered to reporting person on such vest date. The restricted stock unit will continue to vest 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 will become vested on February 20, 2019 and shares will be delivered to reporting person on such vest date. 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). Roger E. George Atty-In-Fact for Sreelakshmi Kolli 2018-02-22