PROSPECTUS
SUPPLEMENT NO. 2
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Filed
Pursuant to Rule 424(b)(7)
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(To
Prospectus dated January 25, 2008, as
supplemented
and amended by prospectus
supplement
no. 1 dated April 14, 2008)
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Registration
Statement No.
333-148649
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Name
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Number
of Shares Beneficially Owned Prior to the
Offering
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Percentage
of Shares Beneficially Owned Prior to the
Offering(1)
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Number
of Shares Offered Hereby
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Number
of Shares Beneficially Owned After the
Offering(2)
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Percentage
of Shares Beneficially Owned After the
Offering(2)
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UBS
Fund Management AG on behalf of Sihl Institutional Fund—Global Convertible
Bonds CHF
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185,577
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*
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185,577
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0
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*
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(1) |
Based
on a total of 47,382,374 shares of our common stock outstanding as
of
November 7, 2008. For purposes of computing the percentage of
outstanding shares beneficially owned by the selling stockholder,
the
shares of common stock beneficially owned by such selling stockholder
are
deemed to be outstanding.
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(2)
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Assumes the selling stockholder sells all of its shares of our common stock offered pursuant to this prospectus. |