X0306 4 2017-02-15 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001552993 Saia Andrea Lynn C/O ALIGN TECHNOLOGY, INC. 2560 ORCHARD PARKWAY SAN JOSE CA 95131 1 0 0 0 Common Stock 2017-02-15 2017-02-15 4 S 0 4000 99.6765 D 14133 D Common Stock 2017-02-16 2017-02-16 4 G 0 1000 0 D 13133 D The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $99.66 to $99.69, 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. Roger E George Atty-in-Fact for Andrea Lynn Saia 2017-02-16