X0306 4 2021-05-07 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001034464 LARKIN C RAYMOND JR C/O ALIGN TECHNOLOGY INC. 2820 ORCHARD PARKWAY SAN JOSE CA 95131 1 0 0 0 Common Stock 2021-05-07 4 S 0 1065 597.4381 D 30987 D Common Stock 2021-05-07 4 S 0 2415 598.5074 D 28572 D Common Stock 2021-05-07 4 S 0 418 599.3107 D 28154 D Common Stock 2021-05-07 4 S 0 1102 600.1201 D 27052 D Common Stock 2021-05-07 4 G 0 36 0.00 D 27016 D The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $596.91 to $597.92, 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 $598.00 to $598.96, 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 $599.00 to $599.37, 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 $600.04 to $600.23, 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 Attorney-in-Fact for C Raymond Larkin Jr. 2021-05-10