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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1. Name and Address of Reporting Person * COLLIS STEVEN H   2. Issuer Name and Ticker or Trading Symbol AMERISOURCEBERGEN CORP [ABC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Executive Vice President (Last) (First) (Middle) 1300 MORRIS DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 01/29/2010 (Street) CHESTERBROOK, PA 19087 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ 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 01/29/2010   M   3,000 A $ 13.3183 42,092 D   Common Stock 01/29/2010   M   2 A $ 13.3197 42,094 D   Common Stock 01/29/2010   M   124,099 A $ 17.2496 166,193 D   Common Stock 01/29/2010   S   124,099 D $ 27.474 42,094 D   Common Stock 02/01/2010   M   18,967 A $ 17.2496 61,061 D   Common Stock 02/01/2010   S   18,969 D $ 27.435 44,648 (1) D

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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

Nonqualified Stock Option (right to buy)

$ 13.3183

01/29/2010

M

3,000

08/08/2002

08/08/2011

Common Stock

3,000

$ 13.3183

0

D

Nonqualified Stock Option (right to buy)

$ 13.3197

01/29/2010

M

2

08/08/2002

08/08/2012

Common Stock

2

$ 13.3197

0

D

Nonqualified Stock Option (right to buy)

$ 17.2496

01/29/2010

M

124,099

04/23/2003

04/23/2012

Common Stock

124,099

$ 17.2496

18,967

D

Nonqualified Stock Option (right to buy)

$ 17.2496

02/01/2010

M

18,967

04/23/2003

04/23/2012

Common Stock

18,967

$ 17.2496

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
COLLIS STEVEN H 1300 MORRIS DRIVE CHESTERBROOK, PA 19087			Executive Vice President

Signatures

John G. Chou for Steven H. Collis		02/02/2010
**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)	Iincludes 2,556 shares acquired under the issuer's employee stock purchase plan.

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