OMNICOM GROUP INC. — Director's Dealing 2008

Feb 21, 2008

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OMNICOM GROUP INC (OMC)
CIK: 0000029989
Period of Report: 2008-02-15

Reporting Person: WREN JOHN (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2008-02-15	Common Stock, par value $0.15 per share	M	100000	$21.34	Acquired	1051786	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1000	$46.31	Disposed	1050786	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	400	$46.32	Disposed	1050386	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1000	$46.33	Disposed	1049386	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	300	$46.34	Disposed	1049086	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	300	$46.35	Disposed	1048786	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	700	$46.36	Disposed	1048086	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	800	$46.37	Disposed	1047286	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1300	$46.38	Disposed	1045986	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1100	$46.39	Disposed	1044886	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	600	$46.40	Disposed	1044286	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	500	$46.41	Disposed	1043786	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	600	$46.42	Disposed	1043186	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	700	$46.43	Disposed	1042486	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1600	$46.44	Disposed	1040886	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1800	$46.45	Disposed	1039086	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1500	$46.46	Disposed	1037586	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	900	$46.47	Disposed	1036686	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1400	$46.48	Disposed	1035286	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1900	$46.49	Disposed	1033386	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1800	$46.50	Disposed	1031586	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	5700	$46.51	Disposed	1025886	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	3000	$46.52	Disposed	1022886	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	3600	$46.53	Disposed	1019286	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	4600	$46.54	Disposed	1014686	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	3000	$46.55	Disposed	1011686	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1400	$46.56	Disposed	1010286	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	1000	$46.57	Disposed	1009286	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	11400	$46.58	Disposed	997886	Direct
2008-02-15	Common Stock, par value $0.15 per share	S	7500	$46.59	Disposed	990386	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2008-02-15	Employee Stock Option (right to buy)	$21.34	M	100000	Disposed	2008-03-05	Common Stock (100000)	Direct
2008-02-19	Employee Stock Option (right to buy)	$21.34	M	197400	Disposed	2008-03-05	Common Stock (197400)	Direct
2008-02-20	Employee Stock Option (right to buy)	$21.34	M	102600	Disposed	2008-03-05	Common Stock (102600)	Direct

Footnotes

F1: This is the first of three Forms 4 filed on February 20, 2008, to report three option exercises and associated sales because
all sales will not fit on one Form 4.

F2: 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 and has been adjusted to correct an administrative error in a previously filed Form 4.

F3: 30% of the shares vested on March 5, 1999; 30% of the shares vested on March 5, 2000; and the remaining 40% of the shares
vested on March 5, 2001.