Company:  ALIGN TECHNOLOGY INC (ALGN)
Form Type:  10-K
Filing Date:  2/29/2012 
CIK:  0001097149 
Address:  2560 ORCHARD PARKWAY 
City, State, Zip:  SAN JOSE, California 95131 
Telephone:  (408) 738-1500 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$37.59  
Change: 
0.74 (2.01%)  
Trade Time: 
May 17  
Market Cap: 
$3.07B
Description of Business
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  FORM 10-K
    PART I
      ITEM 1. BUSINESS
        NAME AND TITLE
      ITEM 1A. RISK FACTORS
      ITEM 1B. UNRESOLVED STAFF COMMENTS
      ITEM 2. PROPERTIES
      ITEM 3. LEGAL PROCEEDINGS
      ITEM 4. MINE SAFETY DISCLOSURES
    PART II
      ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED ...
      ITEM 6. SELECTED CONSOLIDATED FINANCIAL DATA
      ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL ...
        Results of Operations
        Liquidity and Capital Resources
      Item 303(a) (4) as of December 31, 2011.
      ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT ...
      ITEM 8. CONSOLIDATED FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
        REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
        INCOME STATEMENT
        BALANCE SHEET
        STOCKHOLDERS EQUITY
        CASH FLOW
        NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
      ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ...
      ITEM 9A. CONTROLS AND PROCEDURES
      ITEM 9B. OTHER INFORMATION
    PART III
      ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE
      ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND ...
      ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND ...
      ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES
    PART IV
      ITEM 15. EXHIBITS, FINANCIAL STATEMENT SCHEDULES
    VALUATION AND QUALIFYING ACCOUNTS
    SIGNATURES
    Exhibit Index
  EXHIBIT 21.1
  EXHIBIT 23.1
    CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
  EXHIBIT 31.1
    CERTIFICATIONS
  EXHIBIT 31.2
  EXHIBIT 32
    906 Certification