X0306 4 2023-02-20 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001233163 HOGAN JOSEPH M C/O ALIGN TECHNOLOGY INC. 410 NO. SCOTTSDALE RD., SUITE 1300 TEMPE AZ 85281 1 1 0 0 President and CEO Common Stock 2023-02-20 4 M 0 17625 0.00 A 206042 D Common Stock 2023-02-20 4 F 0 7891 316.71 D 198151 D Common Stock 1500 I See Footnotes Restricted Stock Unit 0.0001 2023-02-20 4 M 0 1865 0.00 D Common Stock 1865 5595 D Restricted Stock Unit 0.0001 2023-02-20 4 M 0 1412 0.00 D Common Stock 1412 2824 D Restricted Stock Unit 0.0001 2023-02-20 4 M 0 2716 0.00 D Common Stock 2716 2716 D Restricted Stock Unit 0.0001 2023-02-20 4 M 0 3348 0.00 D Common Stock 3348 0 D Market Stock Unit 0.0001 2023-02-20 4 M 0 8284 0.00 D Common Stock 8284 0 D Restricted Stock Unit 0.0001 2023-02-20 4 A 0 14690 0.00 A Common Stock 14690 14690 D Market Stock Unit 0.0001 2023-02-20 4 A 0 34277 0.00 A Common Stock 34277 34277 D These securities are held directly by the spouse of the Reporting Person. The Reporting Person disclaims beneficial ownership of these securities, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of the securities for purposes of Section 16 or any other purpose. Represents par value of ALGN common stock. 1/4th of the restricted stock unit granted on February 20, 2022 became vested on February 20, 2023 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. 1/4th of the restricted stock unit granted on February 20, 2021 became vested on February 20, 2023 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. 1/4th of the restricted stock unit granted on February 20, 2020 became vested on February 20, 2023 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. 1/4th of the restricted stock unit granted on February 20, 2019 became vested on February 20, 2023 and shares were delivered to reporting person on such vest date. The market stock unit granted February 20, 2020 became fully vested on February 20, 2023, and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit granted on February 20, 2023 will become vested on February 20, 2024 and shares will be delivered to reporting person on such vest date. 1/4th of the restricted stock unit will continue to vest annually thereafter 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. 100% of 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). /s/ Julie A. Coletti Attorney-in-Fact for Joseph Hogan 2023-02-23