Exhibit 5.1 828,571 SHARES HALOZYME THERAPEUTICS, INC. SHARES OF COMMON STOCK ($0.001 PAR VALUE) PLACEMENT AGENT AGREEMENTPlacement Agent Agreement • December 14th, 2005 • Halozyme Therapeutics Inc • Biological products, (no disgnostic substances) • New York
Contract Type FiledDecember 14th, 2005 Company Industry Jurisdiction