X0306 4 2020-02-03 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001675043 Hockridge Stuart A C/O ALIGN TECHNOLOGY INC. 2820 ORCHARD PARKWAY SAN JOSE CA 95131 0 1 0 0 SVP Global HR Common Stock 2020-02-03 4 S 0 241 253.8381 D 691 D Common Stock 2020-02-03 4 S 0 561 253.58 D 130 D The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $253.77 to $253.87, inclusive. The reporting person undertakes to provide Align Technology Inc., any security holder of Align Technology Inc. or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. Includes 124 shares acquired under the ALGN ESPP on January 31,2020. /s/Julie Ann Coletti, Atty-in-Fact for Stuart Hockridge 2020-02-04