X0306 4 2018-05-31 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001682549 Olson Jennifer ALIGN TECHNOLOGY, INC. 2560 ORCHARD PARKWAY SAN JOSE CA 94131 0 1 0 0 SVP & Mng Dir D-DCC Common Stock 2018-05-31 4 S 0 1505 334.051 D 3919 D The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $334.0194 to $334.17, 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 Jennifer Olson 2018-05-31