FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * Tan Sheila K   2. Issuer Name and Ticker or Trading Symbol ALIGN TECHNOLOGY INC [ALGN] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP, Marketing & CMO (Last) (First) (Middle) C/O ALIGN TECHNOLOGY INC., 881 MARTIN AVE. 3. Date of Earliest Transaction (Month/Day/Year) 02/18/2011 (Street) SANTA CLARA, CA 95050 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Restricted Stock Unit

$ 0.0001 (1)

02/18/2011

02/18/2011

A

10,000

(2)

(2)

Common Stock

10,000

$ 0

10,000

D

Market Stock Unit

$ 0.0001 (1)

02/18/2011

02/18/2011

A

15,000 (3)

(4)

(4)

Common Stock

15,000 (3)

$ 0

15,000 (3)

D

Right to Buy (Common Stock)

$ 20.79

02/18/2011

02/18/2011

A

15,100

02/18/2012(5)

02/18/2018

Common Stock

15,100

$ 0

15,100

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Tan Sheila K C/O ALIGN TECHNOLOGY INC. 881 MARTIN AVE. SANTA CLARA, CA 95050			VP, Marketing & CMO

Signatures

/s/ Roger E. George Atty-In-Fact for Sheila Tan		02/22/2011
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Represents par value of ALGN common stock
(2)	1/3rd of the restricted stock unit will become vested one year after the date of grant and 1/3rd of the restricted stock unit will vest annually thereafter. Shares will be delivered to reporting person on each vest date.
(3)	Represents the maximum number of shares which may be issued under the market stock unit. The actual number of shares to be issued on each vest date will depend on the Issuer's stock price performance as compared to the NASDAQ Composite Index performance calculated as of each vesting date.
(4)	50% of the shares which may be issued under the market stock unit will vest on the last day of the second year of the Performance Period (as defined in the market stock unit agreement) and 50% of the shares which may be issued under the market stock unit will vest on the last day of the Performance Period.
(5)	1/4th 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 will become vested and exercisable each month thereafter.

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