0001104659-10-043671 Sample Contracts

Confidential Materials omitted and filed separately with the Securities and Exchange Commission. Asterisks denote omissions. CPREMETM - A123 SYSTEMS SALES AGREEMENT

Sales Agreement • August 11th, 2010 • A123 Systems, Inc. • Miscellaneous electrical machinery, equipment & supplies • Texas

• Contract Type
  Sales Agreement
• Filed
  August 11th, 2010
• Company
  A123 Systems, Inc.
• Industry
  Miscellaneous electrical machinery, equipment & supplies
• Jurisdiction
  Texas

This Sales Agreement (“Agreement”) is made and entered into between ConocoPhillips Specialty Products Inc., a Delaware corporation with an office at 600 North Dairy Ashford, Houston, Texas 77079 (“Seller”) and A123 Systems, Inc., a Delaware corporation, with an office at Arsenal on the Charles, 321 Arsenal Street, Watertown, Massachusetts 02472 (“Buyer”).

A123 SYSTEMS, INC. Restricted Stock Unit Agreement

Restricted Stock Unit Agreement • August 11th, 2010 • A123 Systems, Inc. • Miscellaneous electrical machinery, equipment & supplies • Delaware

• Contract Type
  Restricted Stock Unit Agreement
• Filed
  August 11th, 2010
• Company
  A123 Systems, Inc.
• Industry
  Miscellaneous electrical machinery, equipment & supplies
• Jurisdiction
  Delaware

Confidential Materials omitted and filed separately with the Securities and Exchange Commission. Asterisks denote omissions. 200 WEST STREET WALTHAM, MASSACHUSETTS

Lease Agreement • August 11th, 2010 • A123 Systems, Inc. • Miscellaneous electrical machinery, equipment & supplies • Massachusetts

• Contract Type
  Lease Agreement
• Filed
  August 11th, 2010
• Company
  A123 Systems, Inc.
• Industry
  Miscellaneous electrical machinery, equipment & supplies
• Jurisdiction
  Massachusetts

THIS INSTRUMENT IS AN INDENTURE OF LEASE in which the Landlord and the Tenant are the parties hereinafter named, and which relates to space in the building (the “Building”) known as, and having an address at, 200 West Street, Waltham, Massachusetts.