X0306 4 2021-08-02 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001675043 Hockridge Stuart A C/O ALIGN TECHNOLOGY INC. 410 NO. SCOTTSDALE RD., SUITE 1300 TEMPE AZ 85281 0 1 0 0 SVP Global HR Common Stock 2021-08-02 4 S 0 130 705.0381 D 9713 D Common Stock 2021-08-02 4 S 0 20 705.735 D 9693 D Common Stock 2021-08-02 4 S 0 4278 705.3828 D 5415 D Common Stock 2021-08-02 4 S 0 1156 704.0185 D 4259 D Common Stock 2021-08-02 4 S 0 527 703.046 D 3732 D Common Stock 2021-08-02 4 S 0 1250 701.919 D 2482 D Common Stock 2021-08-02 4 S 0 1485 700.9459 D 997 D Common Stock 2021-08-02 4 S 0 440 700.3082 D 557 D The price reported in column 4 is an average price. These shares were sold in multiple transactions at prices ranging from $704.55 to $705.53, 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 $703.56 to $704.53, 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 $702.70 to $703.53, 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 $701.50 to $702.435, 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 $700.52 to $701.475, 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 $700.23 to $700.44, 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 Stuart Hockridge 2021-08-03