    <SEC-DOCUMENT>0001097149-23-000030-index.html : 20230405
    <SEC-HEADER>0001097149-23-000030.hdr.sgml : 20230405
    <ACCEPTANCE-DATETIME>20230405160909
    ACCESSION NUMBER:		0001097149-23-000030
    CONFORMED SUBMISSION TYPE:	DEFA14A
    PUBLIC DOCUMENT COUNT:		3
    FILED AS OF DATE:		20230405
    DATE AS OF CHANGE:		20230405

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			ALIGN TECHNOLOGY INC
    		CENTRAL INDEX KEY:			0001097149
    		STANDARD INDUSTRIAL CLASSIFICATION:	ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
    		IRS NUMBER:				943267295
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEFA14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-32259
    		FILM NUMBER:		23802600

    	BUSINESS ADDRESS:
    		STREET 1:		410 NORTH SCOTTSDALE ROAD, SUITE 1300
    		CITY:			TEMPE
    		STATE:			AZ
    		ZIP:			85288
    		BUSINESS PHONE:		408-470-1000

    	MAIL ADDRESS:
    		STREET 1:		410 NORTH SCOTTSDALE ROAD, SUITE 1300
    		CITY:			TEMPE
    		STATE:			AZ
    		ZIP:			85288
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEFA14A
    <SEQUENCE>1
    <FILENAME>algn-20221231xdefa14a.htm
    <DESCRIPTION>DEFA14A
    <TEXT>
    Document 1 - file: algn-20221231xdefa14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>2
    <FILENAME>algnregisterednoticeproof2.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: algnregisterednoticeproof2.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>algnregisterednoticeproof2a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: algnregisterednoticeproof2a.jpg

    </DOCUMENT>
    </SEC-DOCUMENT>