X0306 4 2019-08-14 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001783781 Myong Anne C/O ALIGN TECHNOLOGY, INC. 2820 ORCHARD PARKWAY SAN JOSE CA 95141 1 0 0 0 Common Stock 2019-08-14 4 P 0 564 177.0447 A 564 D The price reported in column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $176.79 to $177.21, 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. /s/Julie Ann Coletti Atty-in-Fact for Anne Myong 2019-08-14