Halozyme Therapeutics, Inc. to Hold Business Update Conference Call on August 10

SAN DIEGO, Aug. 2 /PRNewswire-FirstCall/ -- Halozyme Therapeutics, Inc. , a biopharmaceutical company developing and commercializing products based on the extracellular matrix, today announced that it will release financial results for the three and six months ended June 30, 2007 after market close on Thursday, August 9, 2007.

Jonathan Lim, MD, President and Chief Executive Officer, Gregory Frost, PhD, Vice President and Chief Scientific Officer, and David Ramsay, Vice President and Chief Financial Officer, will host an investment community conference call beginning at 8:00 a.m. PT (11:00 a.m. ET) on Friday, August 10, 2007, to provide a business update.

Individuals interested in participating in the conference call may do so by dialing 888-463-4487 for domestic callers, or 706-679-5355 for international callers. Those interested in listening to the conference call live via the Internet may do so by visiting the Investor Relations section of the Company’s Web site at http://www.halozyme.com. A replay will be available on Halozyme’s website for 30 days. A telephone replay will be available for 48 hours by dialing 800-642-1687 from the U.S., or 706-645-9291 for international callers, and entering reservation number 10793634.

About Halozyme Therapeutics, Inc.

Halozyme is a biopharmaceutical company developing and commercializing products based on the extracellular matrix for the drug delivery, oncology, and dermatology markets. The company’s portfolio of products is based on intellectual property covering the family of human enzymes known as hyaluronidases. The company’s Enhanze(TM) Technology is a novel drug delivery platform designed to increase the absorption and dispersion of biologics. In addition, the company has received FDA approval for two products: Cumulase(R) and HYLENEX, for use as an adjuvant to increase the absorption and dispersion of other injected drugs and fluids. The Company also has a number of different enzymes in its portfolio that are targeting significant areas of unmet need.

Halozyme Contact Investor Relations Contact David A. Ramsay Don Markley Chief Financial Officer Lippert/Heilshorn & Associates (858) 794-8881 (310) 691-7100 dramsay@halozyme.comdmarkley@lhai.com

Halozyme Therapeutics, Inc.

CONTACT: David A. Ramsay, Chief Financial Officer of HalozymeTherapeutics, Inc., +1-858-794-8881, dramsay@halozyme.com; or InvestorRelations, Don Markley of Lippert|Heilshorn & Associates, +1-310-691-7100,dmarkley@lhai.com, for Halozyme Therapeutics, Inc.

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