JOINT FILING AGREEMENT
In
accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of
1934, as amended, the persons names below agree to the joint filing on behalf of
each of them a Statement on Schedule 13D (including amendments thereto)
with regard to the common stock of Halozyme Therapeutics, Inc., and further
agree that this Joint Filing Agreement be included as an exhibit to such joint
filings. In evidence thereof, the undersigned, being duly authorized,
hereby execute this agreement as of the 25th day of March, 2008.
Date: March
24, 2008
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/s/Xxxxxx X. Xxxx
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Xxxxxx
X. Xxxx
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Date: March
24, 2008
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NEW
RIVER MANAGEMENT V, LP
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By:
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Third
Security Capital Partners V, LLC, its general partner
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By:
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Third
Security, LLC, its manager
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By:
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/s/Xxxxxx X. Xxxx
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Xxxxxx
X. Xxxx
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Manager
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