OMNICOM GROUP INC. — Director's Dealing 2005

Jan 15, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OMNICOM GROUP INC (OMC)
CIK: 0000029989
Period of Report: 2005-01-13

Reporting Person: DRU JEAN MARIE (Pres. & CEO of TBWA Worldwide)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-01-13	Common Stock, Par Value $0.15	M	50000	$42.6875	Acquired	60400	Direct
2005-01-13	Common Stock, Par Value $0.15	S	22000	$86.00	Disposed	38400	Direct
2005-01-13	Common Stock, Par Value $0.15	S	3000	$86.05	Disposed	35400	Direct
2005-01-13	Common Stock, Par Value $0.15	S	3000	$86.06	Disposed	32400	Direct
2005-01-13	Common Stock, Par Value $0.15	S	5000	$86.07	Disposed	27400	Direct
2005-01-13	Common Stock, Par Value $0.15	S	17000	$86.10	Disposed	10400	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-01-13	Options to purchase Common Stock (Right to Buy)	$42.6875	M	50000	Disposed	2008-03-05	Common Stock (50000)	Direct

Footnotes

F1: The options became exercisable as follows: 30% on March 5, 1999; 30% on March 5, 2000; and 40% on March 5, 2001.