0001193125-06-068329 Sample Contracts

SEATTLE GENETICS, INC. Common Stock UNDERWRITING AGREEMENT dated March 29, 2006

Underwriting Agreement • March 30th, 2006 • Seattle Genetics Inc /Wa • Biological products, (no disgnostic substances) • New York

• Contract Type
  Underwriting Agreement
• Filed
  March 30th, 2006
• Company
  Seattle Genetics Inc /Wa
• Industry
  Biological products, (no disgnostic substances)
• Jurisdiction
  New York

Re: Stock Purchase Agreement

Stock Purchase Agreement • March 30th, 2006 • Seattle Genetics Inc /Wa • Biological products, (no disgnostic substances) • New York

• Contract Type
  Stock Purchase Agreement
• Filed
  March 30th, 2006
• Company
  Seattle Genetics Inc /Wa
• Industry
  Biological products, (no disgnostic substances)
• Jurisdiction
  New York

Baker Brothers Investments, LLC (“BBI”) and its affiliated funds (each, an “Investor” and, collectively the “Investors”), hereby confirms its agreement with you as follows: