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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 ZFvAtP6V8iZqPFC/yiD2XQ==

<SEC-DOCUMENT>/in/edgar/work/20000724/0000891092-00-000627/0000891092-00-000627.txt : 20000921
<SEC-HEADER>0000891092-00-000627.hdr.sgml : 20000921
ACCESSION NUMBER:		0000891092-00-000627
CONFORMED SUBMISSION TYPE:	424B3
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20000724

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			OMNICOM GROUP INC
		CENTRAL INDEX KEY:			0000029989
		STANDARD INDUSTRIAL CLASSIFICATION:	 [7311
]		IRS NUMBER:				131514814
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231
</COMPANY-DATA>

		FILING VALUES:
			FORM TYPE:		424B3
			SEC ACT:		
			SEC FILE NUMBER:	333-47047
			FILM NUMBER:		677375
</FILING-VALUES>

			BUSINESS ADDRESS:	
				STREET 1:		437 MADISON AVE
				CITY:			NEW YORK
				STATE:			NY
				ZIP:			10022
				BUSINESS PHONE:		2124153700
</BUSINESS-ADDRESS>

				MAIL ADDRESS:	
					STREET 1:		437 MADISON AVE
					CITY:			NEW YORK
					STATE:			NY
					ZIP:			10022
</MAIL-ADDRESS>

					FORMER COMPANY:	
						FORMER CONFORMED NAME:	DOYLE DANE BERNBACH GROUP INC
						DATE OF NAME CHANGE:	19861117
</FORMER-COMPANY>

						FORMER COMPANY:	
							FORMER CONFORMED NAME:	DOYLE DANE BERNBACH INTERNATIONAL INC
							DATE OF NAME CHANGE:	19850604
</FORMER-COMPANY>

							FORMER COMPANY:	
								FORMER CONFORMED NAME:	DOYLE DANE BERNBACH INC
								DATE OF NAME CHANGE:	19781226
</FORMER-COMPANY>
</FILER>
</SEC-HEADER>
<DOCUMENT>
<TYPE>424B3
<SEQUENCE>1
<FILENAME>0001.txt
<DESCRIPTION>PROSPECTUS SUPPLEMENT
<TEXT>


PROSPECTUS SUPPLEMENT
(To Prospectus Dated March 6, 1998)

                               OMNICOM GROUP INC.
                        $230,000,000 Principal Amount of
              2 1/4% Convertible Subordinated Debentures due 20013
                     (Interest Payable January 6 and July 6)

                        4,615,694 Shares of Common Stock

                                   ----------

      This document  supplements the Prospectus  dated March 6, 1998 relating to
(i) $230,000,000  aggregate principal amount of 2 1/4% Convertible  Subordinated
Debentures  due 2013  (the  "Debentures")  of  Omnicom  Group  Inc.,  a New York
corporation  ("Omnicom" or the "Company"),  and (ii) 4,615,694  shares of Common
Stock,  par value $0.15 per share (the "Common  Stock") of the Company which are
initially   issuable  upon   conversion  of  the  Debentures   plus   additional
indeterminate  number  of shares of Common  Stock as may  become  issuable  upon
conversion of the Debentures as a result of adjustments to the conversion  price
(the  "Shares").  The  Debentures  were  initially  acquired from the Company by
Morgan Stanley & Co.  Incorporated  in January 1998 in connection with a private
offering.  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 July 17,  2000 the  closing  price of the  Common  Stock as
reported on the New York Stock Exchange was $86.0625 per share. The Common Stock
is traded under the symbol "OMC."

      In  accordance  with  the  Section  of the  Prospectus  entitled  "Selling
Securityholders"  (which  appears on page 19 of the  Prospectus),  the following
information is provided with respect to the beneficial owners of the Debentures:

                                       Principal Amount      Principal Amount of
                                         of Debentures        Debentures to be
Name of Selling Securityholder(s)     Beneficially Owned      Offered for Sale
- --------------------------------      ------------------     -------------------
Deutsche Bank Securities Inc.             $1,000,000             $1,000,000

      The  Debentures  being  offered  by  the  Selling  Securityholders  hereby
represent   all  of  the   Debentures   beneficially   owned   by  the   Selling
Securityholders  as of July 17, 2000. Except for the purchase of the Debentures,
none of the Selling  Securityholders  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 July 24, 2000.

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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