0001193125-12-507514 Sample Contracts

REGISTRATION RIGHTS AGREEMENT

Registration Rights Agreement • December 19th, 2012 • ARCA Biopharma, Inc. • In vitro & in vivo diagnostic substances • New York

• Contract Type
  Registration Rights Agreement
• Filed
  December 19th, 2012
• Company
  ARCA Biopharma, Inc.
• Industry
  In vitro & in vivo diagnostic substances
• Jurisdiction
  New York

This REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of December , 2012, is by and among ARCA biopharma, Inc., a Delaware corporation (the “Company”), and the undersigned buyer ( “Buyer”).

SUBSCRIPTION AGREEMENT

Subscription Agreement • December 19th, 2012 • ARCA Biopharma, Inc. • In vitro & in vivo diagnostic substances • New York

• Contract Type
  Subscription Agreement
• Filed
  December 19th, 2012
• Company
  ARCA Biopharma, Inc.
• Industry
  In vitro & in vivo diagnostic substances
• Jurisdiction
  New York

This Subscription Agreement (the “Agreement”) is dated as of December [ ], 2012 (the “Effective Date”), between ARCA biopharma, Inc., a Delaware corporation (the “Company”), and the Purchaser identified on the signature page hereto (the “Purchaser”).

AMENDMENT TO THE REGISTRATION RIGHTS AGREEMENT

The Registration Rights Agreement • December 19th, 2012 • ARCA Biopharma, Inc. • In vitro & in vivo diagnostic substances • New York

• Contract Type
  The Registration Rights Agreement
• Filed
  December 19th, 2012
• Company
  ARCA Biopharma, Inc.
• Industry
  In vitro & in vivo diagnostic substances
• Jurisdiction
  New York

This Amendment to that certain Registration Rights Agreement dated October 25, 2012 (the “Registration Rights Agreement”) is made and entered into this 18th day of December, 2012 between ARCA biopharma, Inc., a Delaware corporation (the “Company”), and the other parties identified on the signature page hereto (the “Buyers”).