Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
GENERAL ELECTRIC CAPITAL CORP
  2. Issuer Name and Ticker or Trading Symbol
A123 SYSTEMS, INC. [AONE]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
3135 EASTON TURNPIKE
3. Date of Earliest Transaction (Month/Day/Year)
09/29/2009
(Street)

FAIRFIELD, CT 06828-0001
4. If Amendment, Date Original Filed(Month/Day/Year)
6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)
4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)
5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)
6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)
7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 09/29/2009   C(4)   800,945 A (4) 800,945 D (1) (5)  
Common Stock 09/29/2009   C(4)   2,382,925 A (4) 2,382,925 D (2) (5)  
Common Stock 09/29/2009   C(4)   2,497,918 A (4) 4,880,843 D (2) (5)  
Common Stock 09/29/2009   C(4)   1,631,191 A (4) 6,512,034 D (2) (5)  
Common Stock               900,277 D (3) (5)  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)
5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)
6. Date Exercisable and Expiration Date
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(Instr. 3 and 4)
8. Price of Derivative Security
(Instr. 5)
9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)
10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)
11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Series C Convertible Preferred Stock (4) 09/29/2009   C(4)     800,945   (4)   (4) Common Stock 800,945 (4) 0 D (1) (5)  
Series D Convertible Preferred Stock (4) 09/29/2009   C(4)     2,382,925   (4)   (4) Common Stock 2,382,925 (4) 0 D (2) (5)  
Series E Convertible Preferred Stock (4) 09/29/2009   C(4)     1,808,068   (4)   (4) Common Stock 2,497,918 (4) 0 D (2) (5)  
Series F Convertible Preferred Stock (4) 09/29/2009   C(4)     1,631,191   (4)   (4) Common Stock 1,631,191 (4) 0 D (2) (5)  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
GENERAL ELECTRIC CAPITAL CORP
3135 EASTON TURNPIKE
FAIRFIELD, CT 06828-0001
    X    
GENERAL ELECTRIC CAPITAL SERVICES INC/CT
3135 EASTON TURNPIKE
FAIRFIELD, CT 06828-0001
      See Exhibit 99.1
GE CAPITAL EQUITY INVESTMENTS INC
201 MERRITT 7
NORWALK, CT 06851
      See Exhibit 99.1
GE CAPITAL CFE INC
201 MERRITT 7
NORWALK, CT 06856
      See Exhibit 99.1
GPSF Securities, Inc.
201 MERRITT 7
NORWALK, CT 06851
      See Exhibit 99.1
GENERAL ELECTRIC CO
3135 EASTON TURNPIKE
FAIRFIELD, CT 06828
      See Exhibit 99.1

Signatures

 /s/ Barbara A. Lane, Attorney-in-Fact for GECC   10/01/2009
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Directly owned by GE Capital CFE, Inc. ("GECFE").
(2) Directly owned by GE Capital Equity Investments, Inc. ("GECEI").
(3) Directly owned by GPSF Securities, Inc. ("GPSF").
(4) The Issuer's preferred stock reported herein is convertible at any time by the holder and has no expiration date, but is subject to mandatory conversion or redemption upon certain events. On September 30, 2009, upon the closing of the Issuer's initial public offering, each share of preferred stock reported herein converted automatically into one share of common stock, except that each share of Series E Convertible Preferred Stock converted automatically into 1.38154 shares of common stock.
(5) Indirectly owned by General Electric Capital Corporation ("GE Capital") because, among other things, GPSF, GECFE, or GECEI, as the case may be, is a direct or indirect wholly-owned subsidiary of GE Capital. GPSF, GECFE, GECEI and GE Capital disclaim beneficial ownership except to the extent of their respective pecuniary interest. See Exhibit 99.1, incorporated by reference herein. Upon the closing of the of the Issuer's intial public offering, none of the Reporting Persons were 10% Owners.
 
Remarks:
Exhibit 99.1:  Joint Filer Information, incorporated herein by reference.

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