X0202 4 2008-02-20 0 0001097149 ALIGN TECHNOLOGY INC ALGN 0001246046 AROLA KENNETH C/O ALIGN TECHNOLOGY INC. 881 MARTIN AVE. SANTA CLARA CA 95050 0 1 0 0 VP, Finance and CFO Common Stock 2008-02-21 2008-02-21 4 C 0 1540 0.0001 A 3218 D Common Stock 2008-02-21 2008-02-21 4 F 0 551 13 D 2667 D Restricted Stock Unit 0.0001 2008-02-20 2008-02-20 4 A 0 8000 0 A Common Stock 8000 8000 D Restricted Stock Unit 0.0001 2008-02-20 2008-02-20 4 A 0 5000 0 A Common Stock 5000 5000 D Right to Buy (Common Stock) 13 2008-02-20 2008-02-20 4 A 0 15000 0 A 2009-02-20 2018-02-20 Common Stock 15000 15000 D Right to Buy (Common Stock) 13 2008-02-20 2008-02-20 4 A 0 24000 0 A 2009-02-20 2018-02-20 Common Stock 24000 24000 D Restricted Stock Unit 0.0001 2008-02-20 2008-02-20 4 C 0 1540 0 D Common Stock 1540 4621 D Represents par value of ALGN Common Stock 1/3 of the restricted stock unit will become vested on February 20, 2010 and 2/3 of the restricted stock unit will become vested on February 20, 2011. Vested shares will be delivered to the reporting person on each vest date. 1/4 of the restricted stock unit will vest on February 20, 2009 and 1/6th of the restricted stock unit will vest each quarter thereafter. Vested shares will be delivered to the reporting person each vest date. Represents an option in which 1/3 of the shares subject to the option will become vested and exercisable on February 20, 2010 and 2/3 of the shares subject to the option will become vested and exercisable on February 20, 2011. Represents an option in which 25% of the shares subject to the option shall become vested and exercisable one year after the date of grant and 1/48th of the shares subject to the option shall become vested and exercisable each month thereafter. 1/4th of the restricted stock unit granted on February 20, 2007 became vested and exercisable on February 20, 2008 and shares were delivered to the reporting person on February 21, 2008. The restricted stock unit will continue to vest quarterly, and vested shares will be delivered to the reporting person on each vest date. Roger E. George, Atty-in-Fact for Kenneth Arola 2008-02-22