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 * Hockridge Stuart A   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) SVP Global HR (Last) (First) (Middle) C/O ALIGN TECHNOLOGY INC., 2820 ORCHARD PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 02/20/2019 (Street) SAN JOSE, CA 95131 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 Common Stock 02/20/2019   M   1,950 A $ 0 3,310 (1) D   Common Stock 02/20/2019   F   737 D $ 253.79 2,573 D

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 (2)	02/20/2019		M			1,500	(3)	(3)	Common Stock	1,500	$ 0	3,000	D
Restricted Stock Unit	$ 0.0001 (2)	02/20/2019		M			450	(4)	(4)	Common Stock	450	$ 0	1,350	D
Restricted Stock Unit	$ 0.0001 (2)	02/20/2019		A		2,084		(5)	(5)	Common Stock	2,084	$ 0	2,084	D
Market Stock Unit	$ 0.0001 (2)	02/20/2019		A		10,418		(6)	(6)	Common Stock	10,418	$ 0	10,418	D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Hockridge Stuart A C/O ALIGN TECHNOLOGY INC. 2820 ORCHARD PARKWAY SAN JOSE, CA 95131			SVP Global HR

Signatures

Roger E. George Atty-in-Fact for Stuart Hockridge		02/22/2019
**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)	Includes 241 shares acquired under the ALGN ESPP on January 31, 2019.
(2)	Represents par value of ALGN common stock.
(3)	1/4th of the restricted stock unit granted on February 20, 2017 became vested on February 20, 2019 and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit will vest annually thereafter and shares will be delivered to reporting person on each vest date.
(4)	1/4th of the restricted stock unit granted on February 20, 2018 became vested on February 20, 2019 and shares were delivered to reporting person on such vest date. 1/4th of the restricted stock unit will vest annually thereafter and shares will be delivered to reporting person on each vest date.
(5)	1/4th of the restricted stock unit granted on February 20, 2019 will become vested on February 20, 2020 and shares will be delivered to reporting person on such vest date. The restricted stock unit will continue to vest annually and shares will be delivered to reporting person on each vest date.
(6)	Represents the maximum number of shares which may be issued under the market stock unit. All of the shares which may be issued under the market stock unit will vest on the last day of the third year of the Performance Period (as defined in the market stock unit agreement).

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