OMNICOM GROUP INC. — Director's Dealing 2005

May 25, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: OMNICOM GROUP INC (OMC)
CIK: 0000029989
Period of Report: 2005-05-23

Reporting Person: OBRIEN MICHAEL J (Senior VP, Gen. Counsel & Sec.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-05-23	Common Stock, Par Value $0.15	A	6000	—	Acquired	26000	Direct

Footnotes

F1: These shares were acquired by the reporting person as a grant of restricted stock, which will vest 20% each year for the next
five years.