X0306 4 2020-11-04 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001293595 Thaler Warren S C/O ALIGN TECHNOLOGY INC. 2820 ORCHARD PARKWAY SAN JOSE CA 95131 1 0 0 0 Common Stock 2020-11-04 4 S 0 1438 479.26 D 31383 D Common Stock 2020-11-04 4 S 0 3307 482.24 D 28076 D Common Stock 2020-11-04 4 S 0 255 483.24 D 27821 D Common Stock 80584 I By Trust The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $478.49 to $479.94, 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. The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $480.07 to $482.86, 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. Represents shares held by the Thaler Family Trust for which the spouse of the Reporting Person is the trustee. /s/Julie Ann Coletti Attorney-in-Fact for Warren S Thaler 2020-11-04