Common Contracts

4,678,000 Shares PHARMASSET, INC. COMMON STOCK (PAR VALUE $0.001 PER SHARE) PLACEMENT AGENCY AGREEMENT

Agency Agreement • January 30th, 2009 • Pharmasset Inc • Pharmaceutical preparations • New York

• Contract Type
  Agency Agreement
• Filed
  January 30th, 2009
• Company
  Pharmasset Inc
• Industry
  Pharmaceutical preparations
• Jurisdiction
  New York

This Agreement confirms our understanding that Pharmasset, Inc., a Delaware corporation (the “Company”), hereby appoints Leerink Swann LLC as its exclusive placement agent (the “Placement Agent”) in connection with the proposed sale to certain investors (the “Direct Offering”) of 4,678,000 shares of its Common Stock par value $0.001 per share (the “Shares”). On the basis of the representations and warranties contained herein, but subject to the terms and conditions set forth herein, the Placement Agent agrees to use its best commercially practicable efforts to solicit and receive offers to purchase the Shares. Until the Closing Date (as defined below), the Company shall not, without the prior written consent of the Placement Agent, solicit or accept offers to purchase Shares otherwise than through the Placement Agent. Notwithstanding anything to the contrary contained in this Agreement, the Placement Agent shall have no obligation to purchase any of the Shares, or any liability to the

1,450,000 Shares Pharmasset, Inc. COMMON STOCK (PAR VALUE $0.001 PER SHARE) PLACEMENT AGENCY AGREEMENT

Agency Agreement • July 15th, 2008 • Pharmasset Inc • Pharmaceutical preparations • New York

• Contract Type
  Agency Agreement
• Filed
  July 15th, 2008
• Company
  Pharmasset Inc
• Industry
  Pharmaceutical preparations
• Jurisdiction
  New York

The undersigned understands that Morgan Stanley & Co. Incorporated (“Morgan Stanley”) proposes to enter into a Placement Agency Agreement (the “Placement Agreement”) with Pharmasset, Inc., a Delaware corporation (the “Company”), providing for the registered direct offering (the “Direct Offering”) by the several Placement Agents, including Morgan Stanley (the “Placement Agents”), on behalf of the Company of shares (the “Shares”) of the Common Stock, $0.001 par value per share, of the Company (the “Common Stock”).