e424b3
Filed Pursuant to Rule 424(b)(3) and (c)
Registration No. 333-163788
PROSPECTUS SUPPLEMENT NO. 9
DATED SEPTEMBER 22, 2010
TO
PROSPECTUS DATED JANUARY 15, 2010
FINISAR CORPORATION
$100,000,000
of
5.0% Convertible Senior Notes
due October 15, 2029
and
Shares of Common Stock
Issuable Upon Conversion of the Notes
 
     This prospectus supplements the prospectus dated January 15, 2010 of Finisar Corporation relating to the public offering and sale by the selling securityholders described below. This prospectus supplement contains information on ownership of principal amount of notes beneficially owned and offered and shares of our common stock issuable upon conversion of the notes. This prospectus supplement should be read in conjunction with the prospectus, and this prospectus supplement is qualified by reference to the prospectus, except to the extent that the information provided by this prospectus supplement supersedes the information contained in the prospectus.
     SEE “RISK FACTORS” BEGINNING ON PAGE 6 OF THE PROSPECTUS TO READ ABOUT FACTORS YOU SHOULD CONSIDER BEFORE BUYING THE NOTES OR OUR COMMON STOCK.
 
     Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved these securities or passed upon the accuracy or adequacy of this prospectus. Any representation to the contrary is a criminal offense.
     The table and related footnotes on pages 55-58 of the prospectus setting forth information concerning the selling securityholders are amended and updated by the addition of the following information:
                                         
    Principal Amount of Notes   Number of Shares of Common Stock
    Beneficially                        
    Owned and   Percentage of                   Owned After
    Offered   Notes   Beneficially   Offered   Completion of
Selling Securityholder (1)   Hereby (1)   Outstanding   Owned(1)(2)   Hereby   the Offering (3)
Brown University (4)
     1,000,000       1.00       93,676       93,676       0  
 
(1)   Amounts indicated may be in excess of the total amount registered due to sales or transfers exempt from the registration requirements of the Securities Act since the date upon which the selling holders provided to us in the information regarding their notes.
 
(2)   Assumes a conversion rate of 93.6768 shares of common stock per $1,000 principal amount of notes (equivalent to an initial conversion price of approximately $10.68 per share of common stock) and a cash payment in lieu of any fractional share interest. However, this conversion price will be subject to adjustment as described under “Description of Notes — Conversion Rights.” As a result, the number of shares of common stock issuable upon conversion of the notes may increase or decrease in the future. This prospectus shall also cover any additional shares of our common stock which become issuable in connection with the shares registered for sale hereby by reason of any stock dividend, stock split, recapitalization or other similar transaction effected without the receipt of consideration which results in an increase in the number of outstanding shares of our common stock.
 
(3)   Assumes the sale of all notes and shares of common stock issuable upon conversion thereof offered pursuant to this prospectus.
 
(4)   This selling securityholder is a non-public entity. P&S Credit Management LP is the investment advisor of the selling securityholder (the “Investment Advisor”). Daniel Nir is the Managing Member of the General Partner of the Investment Advisor and in such capacity has voting and investment power over the securities that this selling securityholder beneficially owns.
The date of this prospectus supplement is September 22, 2010.