Company:  AFFYMETRIX INC (AFFX)
Form Type:  424B5
Filing Date:  6/21/2012 
CIK:  0000913077 
Address:  3420 CENTRAL EXPRESSWAY 
City, State, Zip:  SANTA CLARA, California 95051 
Telephone:  (408) 731-5000 
Fiscal Year:  12/31 
Last Trade
Last Trade: 
$3.72   		Change: 
0.05 (1.36%)  
Trade Time: 
02:01 PM EST   		Market Cap: 
$264.48M
Description of Business
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  FORM 424B5
    TABLE OF CONTENTS
    ABOUT THIS PROSPECTUS SUPPLEMENT
    FORWARD-LOOKING STATEMENTS
    Risk Factors
    THE OFFERING
    SUMMARY CONSOLIDATED AND PRO FORMA FINANCIAL DATA
    RATIO OF EARNINGS TO FIXED CHARGES
    RISK FACTORS
    USE OF PROCEEDS
    CAPITALIZATION
      1. ACCOUNTING POLICIES
    MARKET FOR OUR COMMON STOCK AND DIVIDENDS
    DESCRIPTION OF NOTES
    U.S. FEDERAL TAX CONSIDERATIONS
    UNDERWRITING
    Conflicts of Interest
    LEGAL MATTERS
    EXPERTS
    WHERE YOU CAN FIND MORE INFORMATION AND INCORPORATION BY ...
    Risk Factors
    RISK FACTORS
    USE OF PROCEEDS
    DIVIDEND POLICY
    DESCRIPTION OF CAPITAL STOCK
    DESCRIPTION OF DEBT SECURITIES
    DESCRIPTION OF WARRANTS
    DESCRIPTION OF UNITS
    PLAN OF DISTRIBUTION
    VALIDITY OF SECURITIES
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