0000950005-03-000570 Sample Contracts

RIGEL PHARMACEUTICALS, INC. COMMON STOCK AND WARRANT PURCHASE AGREEMENT April 29, 2003 TABLE OF CONTENTS

Common Stock and Warrant Purchase Agreement • May 12th, 2003 • Alta Partners • Pharmaceutical preparations • California

• Contract Type
  Common Stock and Warrant Purchase Agreement
• Filed
  May 12th, 2003
• Company
  Alta Partners
• Industry
  Pharmaceutical preparations
• Jurisdiction
  California

EXHIBIT A

Joint Filing Agreement • May 12th, 2003 • Alta Partners • Pharmaceutical preparations

• Contract Type
  Joint Filing Agreement
• Filed
  May 12th, 2003
• Company
  Alta Partners
• Industry
  Pharmaceutical preparations

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. ALTA PARTNERS ALTA CALIFORNIA PARTNERS, L.P.