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 * DICANDILO MICHAEL D   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 VP & CFO (Last) (First) (Middle) 1300 MORRIS DRIVE 3. Date of Earliest Transaction (Month/Day/Year) 11/19/2009 (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 11/19/2009   M   33,800 A $ 15.6619 114,764 (1) D   Common Stock 11/19/2009   S   33,800 D $ 24.25 80,964 D   Common Stock 11/20/2009   M   68,390 A $ 15.6619 149,354 D   Common Stock 11/20/2009   M   204,380 A $ 17.2496 353,734 D   Common Stock 11/20/2009   M   25,000 A $ 13.5409 378,734 D   Common Stock 11/20/2009   S   297,770 D $ 24.2511 80,964 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)

$ 15.6619

11/19/2009

M

33,800

09/17/2002

09/17/2011

Common Stock

33,800

$ 15.6619

68,390

D

Non-qualified stock option (right to buy)

$ 15.6619

11/20/2009

M

68,390

09/17/2002

09/17/2011

Common Stock

68,390

$ 15.6619

0

D

Non-qualified stock option (right to buy)

$ 17.2496

11/20/2009

M

204,380

04/23/2003

04/23/2012

Common Stock

204,380

$ 17.2496

0

D

Non-qualified stock option (right to buy)

$ 13.5409

11/20/2009

M

25,000

02/27/2004

02/27/2013

Common Stock

25,000

$ 13.5409

199,818

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
DICANDILO MICHAEL D 1300 MORRIS DRIVE CHESTERBROOK, PA 19087			Executive VP & CFO

Signatures

John G. Chou for Michael D. DiCandilo		11/23/2009
**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)	Adjusted in accordance with the Company's 2-for-1 stock split in the form of a dividend effective June 15, 2009.

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