PROSPECTUS SUPPLEMENT
(To Prospectus Dated January 28, 1998)
1,000,000 Shares of Common Stock
($.15 Par Value)
OMNICOM GROUP INC.
----------
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 the 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 ("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 A Common Shares and Class B Common Shares of Quintenco Holdings Inc. a
corporation (now amalgamated with OCI) 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 October 2, 2000, the
closing price of the Common Stock as reported on the New York Stock Exchange was
$73 5/8 per share. The Common Stock is traded under the symbol "OMC."
The Selling Shareholder does not own in excess of 1% of the Common Stock
of the Company and since the Selling Shareholder 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 the Selling
Shareholder 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:
Amount of Shares Amount of
Name of Selling Beneficially Owned Shares to be
Shareholder as of October 2, 2000 Offered for Sale
--------------- --------------------- ----------------
1222287 Ontario Inc. 6,631 6,631
Except for the purchase of the shares of Common Stock, the Selling
Shareholder has not 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 6, 2000.
