424B3

 

Filed Pursuant to Rule 424(b)(3)
Registration No. 333-180650

Prospectus Supplement No. 6

(to prospectus dated May 2, 2012)

 

LOGO

This Prospectus Supplement No. 6 supplements and amends the prospectus dated May 2, 2012, or the Original Prospectus, and the other Prospectus Supplements thereto, dated May 10, 2012, June 11, 2012, June 19, 2012, July 26, 2012 and April 17, 2013, which we refer to collectively as the Prospectus. The Prospectus relates to the sale of an aggregate of 20,819,468 shares of our common stock, $0.0001 par value per share, by the selling stockholders identified in the Original Prospectus, including their transferees, pledgees, donees or successors.

This Prospectus Supplement No. 6 should be read in conjunction with, and delivered with, the Original Prospectus, and is qualified by reference to the Original Prospectus except to the extent that the information in this Prospectus Supplement No. 6 supersedes the information contained in the Original Prospectus.

We are filing this Prospectus Supplement No. 6 to reflect the transfer of warrants by Midsummer Small Cap Master, Ltd. The table appearing under the caption “Selling Security Holders” on page 14 of the Original Prospectus, as amended by Prospectus Supplement No. 5, is hereby amended and supplemented by (i) amending the entry for Midsummer Small Cap Master, Ltd., as well as the corresponding footnote, as set forth below, and (ii) adding an entry and corresponding footnote for Sabby Healthcare Volatility Master Fund, Ltd., as set forth below. Beneficial ownership is determined in accordance with the rules of the Securities and Exchange Commission and is based upon information provided by the selling stockholders named below. Based upon information provided by the selling stockholders named below, to our knowledge, none of the selling stockholders, nor any of their affiliates, directors or principal equity holders (5% or more) has held any position or office or has had any other material relationship with us (or our predecessors or affiliates) during the past three years.

 

Selling Stockholder

    # of Shares
Beneficially
Owned
Before
Offering		      # of
Shares
Offered		      # of Shares
Underlying
Warrants
Offered		      # of Shares
Beneficially
Owned
After
Offering		      % of
Shares
Beneficially
Owned
After
Offering		  

Midsummer Small Cap Master, Ltd. (35)

      207,684         0         145,184         62,500         *   

Sabby Healthcare Volatility Master Fund, Ltd. (36)

      537,500         0         200,000         337,500         *   

 

* Less than 1%
(35) Consists of 207,684 shares issuable upon exercise of warrants. Michel Amsalem and Joshua Thomas may be deemed to have voting and investment power with respect to such shares.
(36) Consists of 537,500 shares issuable upon exercise of warrants. Sabby Management, LLC is the investment manager of Sabby Healthcare Volatility Master Fund, Ltd. Sabby Management, LLC and Hal Mintz, in his capacity as manager of Sabby Management, LLC, may be deemed to have voting and investment power with respect to such shares. Each of Sabby Management, LLC and Hal Mintz disclaims beneficial ownership of these shares except to the extent of any pecuniary interest therein.

This investment involves risks. See “Risk Factors” on page 10 of the Original Prospectus, as updated by the supplements thereto and the additional documents incorporated by reference therein.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if the Prospectus or this Prospectus Supplement No. 6 is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this Prospectus Supplement No. 6 is December 4, 2013.

 

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