Sec Form 4 Filing - DRU JEAN MARIE @ OMNICOM GROUP INC - 2007-12-11

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 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 DRU JEAN MARIE 2. Issuer Name and Ticker or Trading Symbol OMNICOM GROUP INC [ OMC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) CEO TBWA Worldwide (Last) (First) (Middle) C/O OMNICOM GROUP, INC., 437 MADISON AVENUE 3. Date of Earliest Transaction (MM/DD/YY) 12/11/2007 (Street) NEW YORK, NY10022 4. If Amendment, Date Original Filed (MM/DD/YY) 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 (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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, par value $0.15 per share 12/11/2007 M 44,400 A $ 31.175 69,484 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 2,700 D $ 49 66,784 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 100 D $ 49.05 66,684 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 200 D $ 49.09 66,484 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 200 D $ 49.13 66,284 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 600 D $ 49.14 65,684 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 100 D $ 49.18 < span class="form4-data"> 65,584 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 100 D $ 49.2 65,484 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 100 D $ 49.21 65,384 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 800 D $ 49.22 64,584 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 1,800 D $ 49.23 62,784 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 1,300 D $ 49.24 61,484 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 5,900 D $ 49.25 55,584 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 3,600 D $ 49.26 51,984 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 2,600 D $ 49.27 49,384 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 4,500 D $ 49.28 44,884 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 2,700 D $ 49.29 42,184 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 8,500 D $ 49.3 33,684 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 1,100 D $ 49.31 32,584 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 700 D $ 49.32 31,884 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 700 D $ 49.33 31,184 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 1,500 D $ 49.34 29,684 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 4,000 D $ 49.35 25,684 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 500 D $ 49.36 25,184 ( 1 ) D Common Stock, par value $0.15 per share 12/11/2007 S 100 D $ 49.37 25,084 ( 1 ) D Common Stock, par value $0.15 per share 12/12/2007 M 200 A $ 31.175 25,284 ( 1 ) D Common Stock, par value $0.15 per share 12/12/2007 S 200 D $ 49 25,084 ( 1 ) D

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 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 Employee Stock Option (right to buy) $ 31.175 ( 2 ) 12/11/2007 M 44,400 ( 3 ) 10/02/2011 Common Stock 44,400 $ 0 288,934 D Employee Stock Option (right to buy) $ 31.175 ( 2 ) 12/12/2007 M 200 ( 3 ) 10/02/2011 Common Stock 200 $ 0 288,734 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other DRU JEAN MARIE C/O OMNICOM GROUP, INC. 437 MADISON AVENUE NEW YORK, NY10022 CEO TBWA Worldwide Signatures /s/ Michael J. O'Brien, Attorney in Fact for Jean-Marie Dru 12/13/2007 Signature of Reporting Person Date

Explanation of Responses:

( 1 )The number of shares reported reflects a two-for-one stock split effected in the form of a 100% stock dividend distributed on June 25, 2007. ( 2 )This option was previously reported as an option covering 166,667 shares at an exercise price of $62.35 per share, and has been adjusted as a result of a two-for-one stock split effected in the form of a 100% stock dividend distributed on June 25, 2007 ( 3 )33.33% of the shares vested on March 4, 2002, and the remaining 66.67% of the shares vested on October 2, 2007.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* 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).

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