0001193125-17-136936 Sample Contracts

ARCA BIOPHARMA, INC. AND , AS WARRANT AGENT FORM OF PREFERRED STOCK WARRANT AGREEMENT DATED AS OF [ ], 20

Preferred Stock Warrant Agreement • April 25th, 2017 • ARCA Biopharma, Inc. • In vitro & in vivo diagnostic substances • New York

• Contract Type
  Preferred Stock Warrant Agreement
• Filed
  April 25th, 2017
• Company
  ARCA Biopharma, Inc.
• Industry
  In vitro & in vivo diagnostic substances
• Jurisdiction
  New York

This PREFERRED STOCK WARRANT AGREEMENT (this “Agreement”), dated as of between ARCA BIOPHARMA, INC., a Delaware corporation (the “Company”), and , a [corporation] [national banking association] organized and existing under the laws of and having a corporate trust office in , as warrant agent (the “Warrant Agent”).

ARCA BIOPHARMA, INC. AND , AS WARRANT AGENT FORM OF COMMON STOCK WARRANT AGREEMENT DATED AS OF [ ], 20

Common Stock Warrant Agreement • April 25th, 2017 • ARCA Biopharma, Inc. • In vitro & in vivo diagnostic substances • New York

• Contract Type
  Common Stock Warrant Agreement
• Filed
  April 25th, 2017
• Company
  ARCA Biopharma, Inc.
• Industry
  In vitro & in vivo diagnostic substances
• Jurisdiction
  New York

This COMMON STOCK WARRANT AGREEMENT (this “Agreement”), dated as of between ARCA BIOPHARMA, INC., a Delaware corporation (the “Company”), and , a [corporation] [national banking association] organized and existing under the laws of and having a corporate trust office in , as warrant agent (the “Warrant Agent”).

ARCA BIOPHARMA, INC. and , AS WARRANT AGENT FORM OF DEBT SECURITIES WARRANT AGREEMENT DATED AS OF [ ], 20

Warrant Agreement • April 25th, 2017 • ARCA Biopharma, Inc. • In vitro & in vivo diagnostic substances • New York

• Contract Type
  Warrant Agreement
• Filed
  April 25th, 2017
• Company
  ARCA Biopharma, Inc.
• Industry
  In vitro & in vivo diagnostic substances
• Jurisdiction
  New York

This DEBT SECURITIES WARRANT AGREEMENT (this “Agreement”), dated as of between ARCA BIOPHARMA, INC., a Delaware corporation (the “Company”), and , a [corporation] [national banking association] organized and existing under the laws of and having a corporate trust office in , as warrant agent (the “Warrant Agent”).