PROSPECTUS SUPPLEMENT
(To Prospectus Dated January 28, 1998)
OMNICOM GROUP INC.
1,000,000 Shares of Common Stock
($.15 Par Value)
This document supplements the Prospectus dated January 28, 1998 relating to 1,000,000 shares of Common Stock, par value $.15 per share (the “Common Stock”) of Omnicom Group Inc., a New York corporation (“Omnicom” or the “Company”). Each share of Common Stock offered hereby was issued upon exchange of an Exchangeable Share (an “Exchangeable Share”) of Omnicom Canada Inc. (“OCI”), a corporation incorporated under the laws of Ontario and a wholly owned subsidiary of the Company, originally issued in a private offering in Canada by OCI for the Class C Special Shares of Quintenco Holdings Inc., a corporation (now amalgamated with OCI) incorporated under the laws of Ontario (“QHI”), in connection with the combination of OCI and QHI. This Prospectus Supplement is incorporated by reference into the Prospectus, and all terms used herein shall have the meaning assigned to them in the Prospectus. On Monday, October 22, 2007, the closing price of the Common Stock as reported on the New York Stock Exchange was $52.03 per share. The Common Stock is traded under the symbol “OMC.”
None of the Selling Shareholders owns in excess of 1% of the Common Stock of the Company and since each of the Selling Shareholders may sell all, some or none of the shares of Common Stock offered hereby, no estimate can be made of the aggregate number of shares of Common Stock that will be owned by each of the Selling Shareholders upon completion of the offering to which this Prospectus Supplement relates. In accordance with the Section of the Prospectus entitled “Selling Shareholders” (which appears on page 10 of the Prospectus), the following information is provided with respect to the beneficial owners of the Common Stock:
| Name of
Selling Shareholder
|
Amount of Shares Beneficially Owned as of October 22, 2007 |
Amount of Shares to be Offered for Sale |
|---|---|---|
| 1222286 Ontario Inc. | 6,001 | 6,001 |
| 1222288 Ontario Inc. | 6,250 | 6,250 |
| John Campbell Reston | 3,343 | 3,343 |
| Frederick James Auchterlonie | 1,994 | 1,994 |
Except for the purchase of the shares of Common Stock, none of the Selling Shareholders has had a material relationship with the Company or any of its affiliates within the past three years.
THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITY COMMISSION NOR HAS THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
The date of this Prospectus Supplement is October 29, 2007.