OMNICOM GROUP INC
S-4, 1996-03-11
ADVERTISING AGENCIES
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     As filed with the Securities and Exchange Commission on March 11, 1996

                                        Registration Statement No. 33-
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   ----------

                                    FORM S-4
                             REGISTRATION STATEMENT
                                      Under
                           THE SECURITIES ACT OF 1933

                                   ----------

                               OMNICOM GROUP INC.
             (Exact name of Registrant as specified in its charter)

        New York                      7311                      13-1514814
(State of Incorporation)  (Primary Standard Industrial       (I.R.S. Employer
                           Classification Code Number)      Identification No.)

                                   ----------

                               437 Madison Avenue
                            New York, New York 10022
                                 (212) 415-3600
               (Address, including zip code, and telephone number,
        including area code, of Registrant's principal executive offices)

                              BARRY J. WAGNER, ESQ.
                               Omnicom Group Inc.
                               437 Madison Avenue
                            New York, New York 10022
                            Telephone: (212) 415-3600
            (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                   Copies to:
   MICHAEL D. DITZIAN, ESQ.                       RONALD W. FRANK, ESQ.
       Davis & Gilbert                   Babst Calland Clements and Zomnir, P.C.
        1740 Broadway                              Two Gateway Center
   New York, New York 10019                  Pittsburgh, Pennsylvania 15222
       (212) 468-4800                                (412) 394-5400

     Approximate  date of commencement of proposed sale of the securities to the
public:  As  soon as  practicable  after  this  Registration  Statement  becomes
effective and all other  conditions to the Merger  pursuant to the Agreement and
Plan of Merger described in the enclosed  Prospectus/Information  Statement have
been satisfied or waived.

     If the  securities  being  registered  on this  Form are being  offered  in
connection  with the formation of a holding company and there is compliance with
General Instruction G, check the following box:

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or interest
reimbursement plans, please check the following box:

                         CALCULATION OF REGISTRATION FEE
<TABLE>
<CAPTION>
================================================================================================================
                                                                 Proposed         Proposed
           Title of                                               maximum          maximum
          securities                           Amount            offering         aggregate         Amount of
             to be                              to be              price          offering        registration
          registered                        registered(1)       per share(2)       price(2)           fee(2)
- ----------------------------------------------------------------------------------------------------------------
<S>                                       <C>                       <C>          <C>                 <C>    
Common Stock, $.50 par value............  1,500,000 shares          $41          $61,500,000         $21,207
================================================================================================================
</TABLE>

(1)  Estimated maximum number of shares issuable by Omnicom Group Inc. under the
     Agreement and Plan of Merger described in this Registration Statement.

(2)  Estimated solely for purposes of calculating the amount of the registration
     fee.  Pursuant  to Rule  457(c),  based on the  average of the high and low
     prices of the Common  Stock of  Omnicom  Group  Inc.  on March 6, 1996,  as
     reported by the New York Stock Exchange.

                                   ----------

     The Registrant  hereby amends this  Registration  Statement on such date or
dates as may be necessary to delay its effective date until the Registrant shall
file a further  amendment  which  specifically  states  that  this  Registration
Statement shall  thereafter  become effective in accordance with Section 8(a) of
the Securities  Act of 1933 or until this  Registration  Statement  shall become
effective on such date as the Commission,  acting pursuant to said Section 8(a),
may determine.

================================================================================
<PAGE>

                              CROSS REFERENCE SHEET

     Cross Reference Sheet Pursuant to Rule 404(a) of the Securities Act of 1933
and Item  501(b) of  Regulation  S-K,  Showing  the  Location  or Heading in the
Prospectus/Information  Statement of the Information  Required by Part I of Form
S-4.
<TABLE>
<CAPTION>
                                                                               Location or Heading in
S-4 Item Number and Caption                                             Prospectus/Information Statement
- ---------------------------                                             --------------------------------
<S>                                                                     <C>
A.  Information about the Transaction                                  
                                                                       
         Forepart of the Registration Statement and Outside Front      
         Cover Page of Prospectus.....................................  Facing page; Cross Reference Sheet, Outside Front Cover
                                                                        Page of Prospectus/Information Statement
         Inside Front and Outside Back Cover Pages                     
         of Prospectus................................................  Inside Front Cover Page of Prospectus/Information
                                                                        Statement; "Available Information"; "Table of Contents"
         Risk Factors, Ratio of Earnings to Fixed Charges and Other    
         Information..................................................  "Summary"; " Comparative Per Share Data"; "Market Price
                                                                        Data"; "Selected Financial Data Of Ketchum"
                                                                       
         Terms of the Transaction.....................................  "Summary"; "The Merger Agreement And The Merger--Background
                                                                        of and Ketchum's Reasons for the Merger; Recommendation of
                                                                        the Ketchum Board of Directors";  "--Omnicom's Reasons for
                                                                        the Merger"; "--The Merger Agreement"; "--Other
                                                                        Considerations"; "The Escrow Agreement and the Ketchum
                                                                        Shareholder Representative"
                                                                       
         Pro Forma Financial Information..............................  *
                                                                       
         Material Contacts with the Company Being Acquired............  "Summary"; "The Merger Agreement And The Merger--Interests
                                                                        of Ketchum's Management in the Merger"
         Additional Information Required for Reoffering by Persons     
         and Parties Deemed to be Underwriters........................  *
                                                                       
                                                                       
         Interests of Named Experts and Counsel.......................  *
                                                                       
                                                                       
         Disclosure of Commission Position On Indemnification for      
         Securities Act Liabilities...................................  *
                                                                       
                                                                       
B. Information About the Registrant                                    
                                                                       
         Information with Respect to S-3 Registrants..................  "Summary"; "Incorporation of Certain Documents by
                                                                        Reference"; "Business Information Concerning Omnicom";
                                                                        "Selected Financial Data of Omnicom"; "Description of
                                                                        Omnicom Capital Stock"
                                                                       
         Incorporation of Certain Information by Reference............  "Incorporation of Certain Documents by Reference"
                                                                       
         Information with Respect to S-2 or S-3 Registrants...........  *
</TABLE>

<PAGE>
                                                                 
<TABLE>
<CAPTION>
                                                                               Location or Heading in
S-4 Item Number and Caption                                             Prospectus/Information Statement
- ---------------------------                                             --------------------------------
<S>                                                                     <C>
         Incorporation of Certain Information by Reference............  *
                                                                       
         Information with Respect to Registrants Other Than S-3 or     
         S-2 Registrants..............................................  *
                                                                       
C.  Information About the Company Being Acquired                       
                                                                       
         Information with Respect to S-3 Companies....................  *
                                                                       
         Information with Respect to S-2 or S-3 Companies.............  *
                                                                       
         Information with Respect to Companies Other Than              
         S-3 or S-2 Companies.........................................  "Summary"; "Business Information Concerning Ketchum";
                                                                        "Selected Financial Data of Ketchum"; "Management's
                                                                        Discussion and Analysis of Financial Condition and Results
                                                                        of Operations of Ketchum"; "Description of Ketchum Capital
                                                                        Stock"; "Index to Ketchum  Financial Statements"
D.  Voting and Management Information                                  
                                                                       
         Information if Proxies, Consents or Authorizations are to     
         be Solicited.................................................  *
                                                                       
         Information if Proxies, Consents or Authorizations are not to 
         be Solicited or in Exchange Offer............................  "Summary"; "The Special Meeting"; "Business Information
                                                                        Concerning Ketchum--Executive Officers and Directors,
                                                                        Principal Shareholders"; "The Merger Agreement and the
                                                                        Merger--Other Considerations--Rights of Dissenting Ketchum
                                                                        Shareholders"
- -------------------                                                   
*   Not Applicable
</TABLE>
<PAGE>

              [Letterhead of Ketchum Communications Holdings, Inc.]




                    NOTICE OF SPECIAL MEETING OF SHAREHOLDERS
                          To Be Held On [_______, 1996]

To The Shareholders of
Ketchum Communications Holdings, Inc.:

      A Special Meeting of the Shareholders of Ketchum Communications  Holdings,
Inc., a Pennsylvania corporation ("Ketchum"), will be held on ________, 1996, at
_____ a.m. (local time), at the offices of Ketchum,  Six PPG Place,  Pittsburgh,
Pennsylvania 15222, to consider and vote upon the following matters described in
the accompanying Prospectus/Information Statement:

     1.   To  consider  and act upon the  approval of an  Agreement  and Plan of
          Merger  (the  "Merger  Agreement")  pursuant  to which a  wholly-owned
          subsidiary of Omnicom Group Inc., a New York corporation  ("Omnicom"),
          will be  merged  with  and  into  Ketchum,  such  that  the  surviving
          corporation  of such  merger  shall be a  wholly-owned  subsidiary  of
          Omnicom and each outstanding share of capital stock of Ketchum will be
          converted  into the right to receive a certain  amount of common stock
          of  Omnicom,   all  as  more  fully  described  in  the   accompanying
          Prospectus/Information Statement; and

     2.   To  consider  and act upon the  approval of an Escrow  Agreement  (the
          "Escrow  Agreement") to be entered into in connection  with the Merger
          Agreement  and  the   appointment   of  Paul  H.  Alvarez  as  Ketchum
          Shareholder Representative, and Edward L. Graf as alternate, to act as
          the collective  agent of the holders of Ketchum common stock under the
          terms of the  Escrow  Agreement,  all as more fully  described  in the
          accompanying Prospectus Information Statement; and

     3.   To consider and act upon any other  business  which may properly  come
          before the Special Meeting or any adjournment thereof.

     Only  holders  of record as of the close of  business  on  ______,  1996 of
common stock, stated value $0.005 per share, of Ketchum ("Ketchum Common Stock")
and of Series A Preferred Stock, $100 par value, of Ketchum ("Ketchum  Preferred
Stock") are entitled to notice of and to vote at the Special Meeting.

      The  affirmative  votes of the holders of a majority of the Ketchum Common
Stock,  voting as a class,  and of the holders of all of the  Ketchum  Preferred
Stock,  voting as a class,  are required to approve the Merger Agreement and the
transactions  contemplated  thereby.  The  affirmative  vote of the holders of a
majority of the voting power  represented by the  outstanding  shares of Ketchum
Common Stock and Ketchum Preferred Stock,  voting together as a single class, is
necessary to approve the Escrow  Agreement  and the  appointment  of the Ketchum
Shareholder Representative.  None of the proposals shall become effective unless
all of the proposals are adopted by the requisite  vote of the  shareholders  of
Ketchum.

      The Board of Directors of Ketchum believes that the foregoing transactions
are fair to, and in the best  interests  of,  Ketchum  and the  shareholders  of
Ketchum,  and recommends that the  shareholders of Ketchum vote FOR the approval
of the Merger  Agreement  and FOR the approval of the Escrow  Agreement  and the
appointment of the Ketchum Shareholder Representative.  Shareholders who dissent
from the Merger in accordance with the Pennsylvania  Business Corporation Law, a
copy  of  which  appears  as  Annex  1 to  the  attached  Prospectus/Information
Statement,  shall have the right to seek  appraisal  of their  capital  stock of
Ketchum.

      As of ___________,  1996, directors and executive officers of Ketchum as a
group owning  approximately  [54.26%] of Ketchum Common Stock, have expressed an
intention  to vote in favor of the  transactions  contemplated  herein;  and the
Trustee of the Ketchum  Profit  Sharing and 401(k)  Plan,  as the sole holder of
Ketchum  Preferred  Stock,  has  expressed  an intention to vote in favor of the
transactions  contemplated  herein.  Accordingly,  the proposals can be approved
without the affirmative vote of any other shareholder of Ketchum.

             WE ARE NOT ASKING YOU FOR A PROXY AND YOU ARE REQUESTED
                             NOT TO SEND US A PROXY.

                                By Order of The Ketchum Board of Directors

                                PAUL H. ALVAREZ
                                Chairman, Chief Executive Officer, and President

Dated:  ____________, 1996
<PAGE>

Information   contained  herein  is  subject  to  completion  or  amendment.   A
registration  statement  relating  to these  securities  has been filed with the
Securities  and Exchange  Commission.  These  securities may not be sold nor may
offers to buy be accepted prior to the time the registration  statement  becomes
effective.  This  prospectus  shall  not  constitute  an  offer  to  sell or the
solicitation of an offer to buy nor shall there be any sale of these  securities
in any State in which such offer,  solicitation  or sale would be unlawful prior
to registration or qualification under the securities laws of any such State.

                              SUBJECT TO COMPLETION

                              DATED MARCH 11, 1996


                      KETCHUM COMMUNICATIONS HOLDINGS, INC.

                              INFORMATION STATEMENT


                                 -------------

                               OMNICOM GROUP INC.

                                   PROSPECTUS

                                 -------------


      This  Prospectus/Information  Statement  is being  furnished to holders of
common stock, stated value $0.005 per share, of Ketchum Communications Holdings,
Inc., a Pennsylvania  corporation  ("Ketchum"),  in connection  with the special
meeting of  shareholders  of  Ketchum  to be held at Six PPG Place,  Pittsburgh,
Pennsylvania 15222, on __________, 1996 commencing at ___ a.m. (local time), and
at any adjournment thereof (the "Special  Meeting").  The purpose of the Special
Meeting is to consider and vote upon  proposals  (a) to adopt an  Agreement  and
Plan of Merger (the "Merger Agreement")  providing for the merger (the "Merger")
of KCI Acquisition Inc. ("OmniSub"), a Pennsylvania corporation and wholly-owned
subsidiary of Omnicom Group Inc., a New York corporation  ("Omnicom"),  with and
into  Ketchum,  and (b) to adopt an Escrow  Agreement  (the "Escrow  Agreement")
pursuant  to  the  Merger   Agreement,   and  to  appoint  Paul  H.  Alvarez  as
representative,  and Edward L. Graf as alternate, to act as the collective agent
of the holders of Ketchum  Common Stock under the terms of the Escrow  Agreement
(the "Ketchum Shareholder Representative").

      This  Prospectus/Information  Statement  constitutes  both an  information
statement  of Ketchum with  respect to the Special  Meeting and a prospectus  of
Omnicom with respect to up to 1,500,000  shares of common stock, par value $0.50
per share, of Omnicom ("Omnicom Common Stock"),  to be issued in connection with
the Merger.

      Omnicom has filed a Registration Statement on Form S-4 with the Securities
and Exchange Commission covering the shares of Omnicom Common Stock to be issued
in connection with the Merger. This Prospectus/Information Statement, along with
the  documents  and  portions of  documents  incorporated  herein by  reference,
constitutes  the  Prospectus  of  Omnicom  filed as a part of such  Registration
Statement.

THE  SECURITIES OF OMNICOM TO BE OFFERED IN CONNECTION  WITH THE MERGER HAVE NOT
BEEN APPROVED OR DISAPPROVED  BY THE SECURITIES AND EXCHANGE  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.


             WE ARE NOT ASKING YOU FOR A PROXY AND YOU ARE REQUESTED
                             NOT TO SEND US A PROXY.

                                 -------------

      The Date of this Prospectus/Information Statement is __________, 1996

                                 -------------
<PAGE>

  No  person  has been  authorized  to give any  information  or to make any
representation  other  than  those  contained  in  this   Prospectus/Information
Statement in connection  with the Special  Meeting or the offering of securities
made hereby and, if given or made, such information or  representation  must not
be relied  upon as having  been  authorized  by  Omnicom,  Ketchum  or any other
person.  This  Prospectus/Information  Statement does not constitute an offer to
sell, or a solicitation of an offer to buy, any securities,  in any jurisdiction
to or  from  any  person  to  whom  it is not  lawful  to  make  such  offer  or
solicitation. Neither the delivery of this Prospectus/Information Statement, nor
any distribution of securities made hereunder,  shall,  under any circumstances,
create an implication that there has been no change in the affairs of Omnicom or
Ketchum  since  the date  hereof  or that the  information  contained  herein is
correct as of any time subsequent to the date hereof.

                                 -------------

                              AVAILABLE INFORMATION

      Omnicom is subject to the  informational  requirements  of the  Securities
Exchange  Act of  1934,  as  amended  (the  "Exchange  Act")  and in  accordance
therewith files reports and other  information  with the Securities and Exchange
Commission  (the "SEC").  The reports,  proxy  statements and other  information
filed  by  Omnicom  with  the SEC can be  inspected  and  copied  at the  public
reference  facilities  maintained by the SEC at Judiciary Plaza,  Room 1024, 450
Fifth Street, N.W.,  Washington,  D.C. 20549, and at the Regional Offices of the
SEC at 7 World Trade  Center,  13th Floor,  New York,  New York  10048-1102  and
Citicorp  Center,  500  West  Madison  Street,  Suite  1400,  Chicago,  Illinois
60661-2511.  Copies  of such  material  also can be  obtained  from  the  Public
Reference  Section of the SEC,  Washington,  D.C. 20549 at prescribed  rates. In
addition,  material  filed by Omnicom can be inspected at the offices of the New
York Stock  Exchange,  Inc. (the "NYSE"),  20 Broad Street,  New York,  New York
10005, on which the Omnicom Common Stock is listed.

      Omnicom  has  filed  with  the SEC a  Registration  Statement  on Form S-4
(together with all  amendments,  exhibits,  annexes and schedules  thereto,  the
"Registration  Statement")  under the  Securities  Act of 1933,  as amended (the
"Securities  Act"),  with  respect to the shares of Omnicom  Common  Stock to be
issued pursuant to the Merger.  This  Prospectus/Information  Statement does not
contain all the information  set forth in the  Registration  Statement,  certain
portions of which have been omitted as permitted by the rules and regulations of
the SEC. Such  additional  information  may be obtained from the SEC's principal
office in Washington,  D.C. Statements contained in this  Prospectus/Information
Statement  or  in  any  document  incorporated  in  this  Prospectus/Information
Statement by  reference  as to the  contents of any  contract or other  document
referred to herein or therein are not necessarily complete, and in each instance
reference  is made to the copy of such  contract or other  document  filed as an
exhibit  to the  Registration  Statement  or  such  other  document,  each  such
statement being qualified in all respects by such reference.

                                       2
<PAGE>

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

      The following  documents  filed with the SEC by Omnicom (File No. 1-10551)
pursuant  to  the   Exchange   Act  are   incorporated   by  reference  in  this
Prospectus/Information Statement:

     1.   Omnicom's  Annual  Report  on Form  10-K  for the  fiscal  year  ended
          December 31, 1994;

     2.   Omnicom's  Quarterly Reports on Form 10-Q for the quarters ended March
          31, 1995; June 30, 1995; and September 30, 1995;

     3.   Omnicom's  Proxy  Statement dated April 7, 1995 for the Annual Meeting
          of  Shareholders  held on May 22,  1995,  and  Proxy  Statement  dated
          October  24,  1995 for the  Special  Meeting of  Shareholders  held on
          November 28, 1995; and

     4.   The  description  of  Omnicom's  Common  Stock  contained in Omnicom's
          Registration Statement pursuant to the Exchange Act, together with all
          amendments   or  reports  filed  for  the  purpose  of  updating  such
          description.

      All  documents  and  reports  subsequently  filed by Omnicom  pursuant  to
Sections  13(a),  13(c),  l4 or 15(d) of the Exchange Act after the date of this
Prospectus/Information Statement shall be deemed to be incorporated by reference
in this  Prospectus/Information  Statement and to be a part hereof from the date
of filing of such  documents or reports.  Any statement  contained in a document
incorporated or deemed to be incorporated by reference herein shall be deemed to
be modified or superseded for purposes of this Prospectus/Information  Statement
to the extent that a  statement  contained  herein or in any other  subsequently
filed document that also is or is deemed to be incorporated by reference  herein
modifies  or  supersedes  such  statement.  Any such  statement  so  modified or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Prospectus/Information Statement.

      This  Prospectus/Information  Statement incorporates documents relating to
Omnicom by reference that are not presented herein or delivered  herewith.  Such
documents  (other than  exhibits to such  documents,  unless such  exhibits  are
specifically  incorporated  herein by  reference)  are  available to any person,
including any beneficial owner, to whom this Prospectus/Information Statement is
delivered,  without charge, on written or oral request directed to Omnicom Group
Inc.,  437  Madison  Avenue,  New York,  New York  10022,  Attention:  Secretary
(telephone  number (212)  415-3600).  In order to ensure timely  delivery of the
documents,  any requests  should be made by [five business days prior to Special
Meeting], 1996.

                                       3
<PAGE>

                                                  TABLE OF CONTENTS
<TABLE>
<CAPTION>
<S>                                                                                                           <C>
SUMMARY ....................................................................................................   5
      The Companies ........................................................................................   5
      The Special Meeting ..................................................................................   5
      Description of Certain Terms of the Merger Agreement .................................................   7
      Other Considerations .................................................................................   9
      The Escrow Agreement and the Ketchum Shareholder Representative ......................................  10

COMPARATIVE PER SHARE DATA .................................................................................  13

MARKET PRICE DATA ..........................................................................................  14

THE SPECIAL MEETING ........................................................................................  15
      Date, Time and Place of Special Meeting ..............................................................  15
      Business to be Transacted at the Special Meeting .....................................................  15
      Record Date; Voting Rights ...........................................................................  15
      Voting Requirements ..................................................................................  15
      Management Ownership .................................................................................  16

THE MERGER AGREEMENT AND THE MERGER ........................................................................  16
      Background of and Ketchum's Reasons for the Merger; Recommendation of the
          Ketchum Board of Directors .......................................................................  16
      Omnicom's Reasons for the Merger .....................................................................  18
      Interests of Ketchum's Management in the Merger ......................................................  19
      Procedure for Distributing Shares of Omnicom Common Stock to Ketchum Shareholders ....................  19
      The Merger Agreement .................................................................................  20
      Other Considerations .................................................................................  23

THE ESCROW AGREEMENT AND THE KETCHUM SHAREHOLDER REPRESENTATIVE ............................................  27

BUSINESS INFORMATION CONCERNING OMNICOM ....................................................................  30

SELECTED FINANCIAL DATA OF OMNICOM .........................................................................  31

BUSINESS INFORMATION CONCERNING KETCHUM ....................................................................  32
      Description of Business ..............................................................................  32
      Executive Officers and Directors, Principal Shareholders .............................................  33

SELECTED FINANCIAL DATA OF KETCHUM .........................................................................  35

MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF KETCHUM ...........  36
      Results of Operations ................................................................................  36
      Capital Resources and Liquidity ......................................................................  38

DESCRIPTION OF OMNICOM CAPITAL STOCK .......................................................................  39

DESCRIPTION OF KETCHUM CAPITAL STOCK .......................................................................  39

COMPARISON OF SHAREHOLDER RIGHTS ...........................................................................  40

LEGAL MATTERS ..............................................................................................  46

EXPERTS ....................................................................................................  46

INDEX TO KETCHUM FINANCIAL STATEMENTS ...................................................................... F-1
</TABLE>

                                       4
<PAGE>

- --------------------------------------------------------------------------------

                                     SUMMARY

     The following is a brief summary of certain  information  contained in this
Prospectus/Information  Statement.  This  summary is not intended to be complete
and is qualified in its entirety by reference to the more  detailed  information
contained  in  or  incorporated  by  reference  in  this  Prospectus/Information
Statement.

                                 The Companies

Omnicom Group Inc. .............   Omnicom,  through  its wholly  and  partially
                                   owned  companies  (hereinafter   collectively
                                   referred to as the "Omnicom Group"), operates
                                   advertising   agencies  which  plan,  create,
                                   produce  and  place  advertising  in  various
                                   media such as television,  radio,  newspapers
                                   and  magazines.  The Omnicom Group offers its
                                   clients such additional services as marketing
                                   consultation,   consumer   market   research,
                                   design and  production of  merchandising  and
                                   sales   promotion   programs  and  materials,
                                   direct    mail     advertising,     corporate
                                   identification    and    public    relations.
                                   According  to  the  unaudited   industry-wide
                                   figures   published  in  the  trade  journal,
                                   Advertising  Age, in 1995  Omnicom was ranked
                                   as the third largest advertising agency group
                                   worldwide.

                                   The Omnicom Group operates as three separate,
                                   independent   agency   networks:   the   BBDO
                                   Worldwide Network,  the DDB Needham Worldwide
                                   Network and the TBWA  International  Network.
                                   The  Omnicom  Group  also  operates   Goodby,
                                   Silverstein  &  Partners  as  an  independent
                                   agency,  and  certain  marketing  service and
                                   specialty   advertising   companies   through
                                   Omnicom's    Diversified    Agency   Services
                                   division.

                                   The  principal  executive  offices of Omnicom
                                   are located at 437 Madison Avenue,  New York,
                                   New  York  10022,   telephone   number  (212)
                                   415-3600.

KCI Acquisition Inc. ...........   OmniSub  was  formed by Omnicom to effect the
                                   proposed  Merger  with  Ketchum  and  has not
                                   engaged in any active business.

Ketchum Communications 
Holdings, Inc.  ................   Ketchum, through its  subsidiaries, is a full
                                   service  communications  company,  which  was
                                   founded in 1923.  Ketchum offers a full range
                                   of  communication  services  including public
                                   relations,   consumer   advertising,   direct
                                   response,  directory  advertising  and  other
                                   related activities.

                                   The  principal  executive  offices of Ketchum
                                   are  located  at Six PPG  Place,  Pittsburgh,
                                   Pennsylvania  15222,  telephone  number (412)
                                   456-3500.

                               The Special Meeting

Date, Time and Place 
of Special Meeting .............   The   Special   Meeting   will   be  held  on
                                   ________1996  at _____ a.m.  (local time), at
                                   Six  PPG  Place,   Pittsburgh,   Pennsylvania
                                   15222.

Record Date; Shares
Entitled To Vote ...............   Holders  of  record  at the close of business
                                   on [                             ] 1996  (the
                                   "Record  Date") of  shares  of common  stock,
                                   stated  value  $0.005 per  share,  of Ketchum
                                   ("Ketchum  Common  Stock"),  and of shares of
                                   Series A Preferred  Stock, par value $100 per
                                   share,   of   Ketchum   ("Ketchum   Preferred
                                   Stock"),    are   entitled   to   notice   of

- --------------------------------------------------------------------------------

                                       5

<PAGE> 
- --------------------------------------------------------------------------------

                                   and to vote at the Special  Meeting.  At such
                                   date there were outstanding  [374,967] shares
                                   of Ketchum  Common  Stock and 6,282 shares of
                                   Ketchum Preferred Stock. 

                                   Ketchum  Common  Stock and Ketchum  Preferred
                                   Stock are collectively  referred to herein as
                                   "Ketchum Stock." Holders of shares of Ketchum
                                   Common   Stock  are  referred  to  herein  as
                                   "Ketchum  Common  Shareholders";  holders  of
                                   Ketchum   Preferred  Stock  are  referred  to
                                   herein as "Ketchum  Preferred  Shareholders";
                                   and Ketchum Common  Shareholders  and Ketchum
                                   Preferred   Shareholders   are   collectively
                                   referred to herein as "Ketchum Shareholders".

Purpose of the Special Meeting .   The  purpose  of the  Special  Meeting  is to
                                   consider and vote upon the following matters:

                                      (a) a  proposal   to  approve  the  Merger
                                          Agreement    and   the    transactions
                                          contemplated    thereby,     including
                                          without   limitation   the  Merger  of
                                          OmniSub with and into Ketchum pursuant
                                          to the  Merger  Agreement,  such  that
                                          Ketchum   will   be   the    surviving
                                          corporation  of such  Merger  and will
                                          become a  wholly-owned  subsidiary  of
                                          Omnicom,  and each  share  of  Ketchum
                                          Stock will be converted into the right
                                          to receive  shares of  Omnicom  Common
                                          Stock, as more fully described herein.
                                                 
                                      (b) a  proposal   to  approve  the  Escrow
                                          Agreement    and   the    transactions
                                          contemplated  thereby,  and to appoint
                                          Paul  H.   Alvarez   as  the   Ketchum
                                          Shareholder Representative, and Edward
                                          L. Graf as alternate, to act on behalf
                                          of  the  Ketchum  Common  Shareholders
                                          under   the   terms   of  the   Escrow
                                          Agreement; and
                                                
                                      (c) such other  proposals  as may properly
                                          be brought before the Special Meeting.

                                   None of these  matters will become  effective
                                   unless all of the  proposals  are  adopted by
                                   the   requisite    votes   of   the   Ketchum
                                   Shareholders.

Vote Required ..................   Pursuant to Pennsylvania law, the approval of
                                   the  Merger  Agreement  and the  transactions
                                   contemplated   thereby   will   require   the
                                   affirmative   votes  of  the   holders  of  a
                                   majority of the Ketchum Common Stock,  voting
                                   as a class,  and of the holders of a majority
                                   of the Ketchum  Preferred Stock,  voting as a
                                   class;   and  the   approval  of  the  Escrow
                                   Agreement and the  appointment of the Ketchum
                                   Shareholder  Representative,   or  any  other
                                   proposals as may  properly be brought  before
                                   the  Special   Meeting,   will   require  the
                                   affirmative vote of the holders of a majority
                                   of  the  voting  power   represented  by  the
                                   outstanding  shares of Ketchum  Common  Stock
                                   and Ketchum Preferred Stock,  voting together
                                   as  a  single  class.   However,  the  Merger
                                   Agreement imposes, as an additional condition
                                   to the vote required, that the Trustee of the
                                   Ketchum  Profit  Sharing and 401(k) Plan (the
                                   "Ketchum  Profit  Sharing  Plan")  shall have
                                   voted all the shares of Ketchum  Stock  owned
                                   by the Ketchum  Profit  Sharing Plan in favor
                                   of the Merger.

                                   As  of  the  Record   Date,   directors   and
                                   executive   officers  of  Ketchum   owned  an
                                   aggregate  of  [203,458]  shares  of  Ketchum
                                   Common  Stock,  representing  [54.26%] of the
                                   
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                                       6

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                                   outstanding  Ketchum  Common Stock as of such
                                   date;  and the Ketchum  Profit  Sharing  Plan
                                   owned of record an  aggregate of 6,282 shares
                                   of Ketchum Preferred Stock, representing 100%
                                   of the outstanding Ketchum Preferred Stock as
                                   of such date.  Each of such  individuals  and
                                   the  Trustee of the  Ketchum  Profit  Sharing
                                   Plan has  expressed  an  intention to vote in
                                   favor of the various proposals.  Accordingly,
                                   the  proposals  can be  approved  without the
                                   affirmative   vote  of  any   other   Ketchum
                                   Shareholders.

              Description of Certain Terms of the Merger Agreement

The Proposed  Merger ...........   Subject  to  the   approval  of  the  Ketchum
                                   Shareholders of the Merger Agreement, OmniSub
                                   will be merged  with and into  Ketchum.  As a
                                   result of the Merger, the business of Ketchum
                                   will be operated as a wholly-owned subsidiary
                                   of Omnicom.

Conversion of Ketchum
Stock ..........................   If the Merger is  consummated,  each share of
                                   Ketchum  Common Stock will be converted  into
                                   shares of Omnicom  Common  Stock,  based upon
                                   the "Common Stock  Conversion  Price" and the
                                   "Market  Value" of the Omnicom  Common Stock.
                                   If the Merger is  consummated,  each share of
                                   Ketchum  Preferred  Stock  will be  converted
                                   into shares of Omnicom  Common  Stock,  based
                                   upon the "Preferred Stock  Conversion  Price"
                                   of  $1,000  and  the  "Market  Value"  of the
                                   Omnicom   Common   Stock.   See  "The  Merger
                                   Agreement   and  the   Merger --  the  Merger
                                   Agreement -- Conversion Prices".

                                   The actual  "Common Stock  Conversion  Price"
                                   will be dependent upon the outstanding number
                                   of shares of Ketchum Common Stock at the time
                                   the  Merger is  legally  effective  under the
                                   laws of the Commonwealth of Pennsylvania (the
                                   "Effective   Time"   of  the   Merger);   the
                                   "Preferred Stock  Conversion  Price" has been
                                   set  at  the  liquidation  preference  of the
                                   Ketchum  Preferred  Stock and is  fixed.  The
                                   total  number  of shares  of  Omnicom  Common
                                   Stock   to   be   issued   to   the   Ketchum
                                   Shareholders   based  upon  such   Conversion
                                   Prices  will  be  dependent  on  the  "Market
                                   Value" of the  Omnicom  Common  Stock,  which
                                   will  be  determined  by the  average  of the
                                   closing  prices  per  share  of  the  Omnicom
                                   Common  Stock on the New York Stock  Exchange
                                   during the 20 consecutive trading days ending
                                   three business days immediately  prior to the
                                   date  of the  Special  Meeting.  Accordingly,
                                   although the actual conversion exchange rates
                                   cannot be  calculated  as of the date of this
                                   Prospectus/Information     Statement,    such
                                   conversion  exchange  rates  will be known by
                                   the date of the  Special  Meeting and will be
                                   available to the attendees thereof.

                                   In order to make  certain  estimates  in this
                                   Prospectus/Information  Statement relating to
                                   the  consideration  to be paid to the Ketchum
                                   Shareholders, it has been assumed that at the
                                   Effective  Time  of  the  Merger,   [374,967]
                                   shares  of  Ketchum   Common  Stock  will  be
                                   outstanding,  which would result in a "Common
                                   Stock  Conversion  Price"  of  [$119.85]  per
                                   share of Ketchum Common Stock.  Assuming then
                                   that the Market  Value of the Omnicom  Common
                                   Stock were $41 (which was the  closing  price
                                   per share of Omnicom  Common Stock on the New
                                   York Stock  Exchange on the last full trading

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                                       7
<PAGE>

                                   
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                                   day prior to the  execution  and  delivery of
                                   the Merger Agreement),  each share of Ketchum
                                   Common  Stock  would  be  converted  into the
                                   right to  receive  [2.92]  shares of  Omnicom
                                   Common  Stock,  and  each  share  of  Ketchum
                                   Preferred  Stock would be converted  into the
                                   right to  receive  [24.39]  shares of Omnicom
                                   Common Stock.

                                   The  closing  of the  Merger  Agreement  (the
                                   "Closing")    has    been    scheduled    for
                                   ___________,  1996, the day after the date of
                                   the Special  Meeting;  however,  this Closing
                                   may be delayed  beyond  ___________,  1996 if
                                   all  conditions  of the Merger  have not been
                                   satisfied or waived by such date.  There will
                                   be no adjustment to the Conversion  Prices if
                                   this occurs,  notwithstanding that the actual
                                   value  of  the  Omnicom  Common  Stock  could
                                   fluctuate  between  the  date of the  Special
                                   Meeting and the date of the  Closing.  At the
                                   time this Prospectus/Information Statement is
                                   being  mailed  to the  Ketchum  Shareholders,
                                   Omnicom  has no  reason to  believe  that the
                                   date of the Closing will not be  ___________,
                                   1996 as scheduled.

Indemnification Obligations
and Escrow Agreement ...........   Pursuant to the Merger Agreement, the Ketchum
                                   Common Shareholders are required to indemnify
                                   Omnicom and its  affiliates  against  certain
                                   losses and damages  arising  under the Merger
                                   Agreement.  Losses and damages may arise as a
                                   result of (i) the inaccuracy or breach of any
                                   representation  or  warranty  or  covenant of
                                   Ketchum contained in the Merger Agreement, or
                                   the  breach  of  or  failure  by  Ketchum  to
                                   perform or discharge  any of its  obligations
                                   under the Merger Agreement, or (ii) any costs
                                   incurred  by Ketchum in  connection  with the
                                   ongoing  reorganization  of the media  buying
                                   operations   of   its   subsidiary,   Ketchum
                                   Communications,   Inc.  ("KCI").  Holders  of
                                   Ketchum  Preferred  Stock are not required to
                                   provide any indemnification  under the Merger
                                   Agreement.     With    certain    exceptions,
                                   indemnification   obligations  arising  under
                                   clause  (i) of this  paragraph  arise only to
                                   the  extent  that  such  losses  and  damages
                                   exceed $100,000.

                                   To satisfy  the  indemnification  obligations
                                   arising  under  clause  (i) of the  preceding
                                   paragraph,  shares of  Omnicom  Common  Stock
                                   having   an   aggregate   Market   Value   of
                                   $4,400,0000  shall be  placed  into an escrow
                                   account (the "General Escrow Fund") under the
                                   terms of the Escrow  Agreement among Omnicom,
                                   Ketchum,      the     Ketchum     Shareholder
                                   Representative  and The Chase Manhattan Bank,
                                   N.A.,  as escrow agent (the "Escrow  Agent").
                                   To satisfy  the  indemnification  obligations
                                   arising  under  clause (ii) of the  preceding
                                   paragraph,  shares of Omnicom  Common  Stock,
                                   having   an   aggregate   Market   Value   of
                                   $2,500,000  will be placed into an additional
                                   escrow  account (the  "Special  Escrow Fund")
                                   under the Escrow Agreement.

                                   Each of the Ketchum Common Shareholders shall
                                   be  depositing  his  pro  rata  share  of the
                                   General  Escrow  Fund or Special  Escrow Fund
                                   based on the  number  of  shares  of  Omnicom
                                   Common Stock received in the Merger.

                                   The   indemnification   obligations   of  the
                                   Ketchum Common  Shareholders  will be limited
                                   to and  satisfied  solely  from,  the General
                                   Escrow Fund and Special Escrow Fund under the

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                                       8

<PAGE>

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                                   Escrow  Agreement  (such that neither Omnicom
                                   nor  any  of its  affiliates  will  have  any
                                   recourse  for the  payment  of any  losses or
                                   other damages arising out of the transactions
                                   contemplated by the Merger Agreement  against
                                   any Ketchum Shareholder nor shall any Ketchum
                                   Shareholder be personally liable for any such
                                   losses    or    damages).     Indemnification
                                   obligations   to  be  satisfied  out  of  the
                                   General  Escrow  Fund will  terminate  on the
                                   earlier  of  the  first   independent   audit
                                   report, if any, of the surviving  corporation
                                   following the Effective Time of the Merger or
                                   one year from the Effective Time (except that
                                   claims  asserted  in  writing  on or prior to
                                   such date will survive until they are decided
                                   and are final and  binding  on the  parties).
                                   Indemnification  obligations  to be satisfied
                                   out of the Special Escrow Fund will terminate
                                   on December 31,  1996,  being the latest date
                                   by which it will be determined whether or not
                                   costs have been incurred in  connection  with
                                   the  reorganization  of  KCI's  media  buying
                                   operations  (except  that claims  asserted in
                                   writing on or prior to such date will survive
                                   until  they are  decided  and are  final  and
                                   binding on the parties).

                                   See "The Merger  Agreement and  the Merger --

                                   The  Merger   Agreement  --   Indemnification
                                   Obligations"  and "The Escrow  Agreement  and
                                   the Ketchum Shareholder Representative".

Conditions to the Merger .......   Consummation of the Merger is contingent upon
                                   satisfaction of certain conditions, including
                                   without  limitation,  the  SEC's  not  having
                                   objected to Omnicom's treatment of the Merger
                                   as  a  pooling-of-interests   for  accounting
                                   purposes,  the Registration  Statement having
                                   been  declared  effective  by the SEC and not
                                   subject to a stop order,  or threatened  stop
                                   order;   the  Omnicom   Common   Stock  being
                                   registered  thereunder  having been  approved
                                   for  listing on the New York Stock  Exchange;
                                   and   holders   of  fewer   than  3%  of  the
                                   outstanding  shares of Ketchum  Common  Stock
                                   having   elected    dissenters   rights,   as
                                   described  more  fully  herein.  In the event
                                   that  a  condition   of  the  Merger  is  not
                                   satisfied,  the Merger may be abandoned  even
                                   if prior thereto the Merger has been approved
                                   by the Ketchum Shareholders.  See "The Merger
                                   Agreement      and     the      Merger--Other
                                   Considerations--Rights  of Dissenting Ketchum
                                   Shareholders."

                              Other Considerations

Recommendation of the
Ketchum Board of Directors .....   As  of  the  Record   Date,   directors   and
                                   executive officers of Ketchum owned of record
                                   an aggregate of approximately [54.26%] of the
                                   outstanding  shares of Ketchum  Common Stock,
                                   and the Profit Sharing Plan owned 100% of the
                                   outstanding   shares  of  Ketchum   Preferred
                                   Stock.  Each of such  directors and executive
                                   officers,  and  the  Trustee  of  the  Profit
                                   Sharing  Plan,  has expressed an intention to
                                   vote his or her  shares of  Ketchum  Stock in
                                   favor of the various proposals.  Accordingly,
                                   these  proposals can be approved  without the
                                   affirmative   vote  of  any   other   Ketchum
                                   Shareholder.

                                   The  Board  of   Directors   of  Ketchum  has
                                   unanimously approved the Merger Agreement and
                                   the  transactions  contemplated  thereby  and
                                   recommends   its   approval  by  the  Ketchum
                                   Shareholders.

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                                       9

<PAGE>

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Interests of Certain Persons
in the Merger ..................   For a  description  of certain  interests  of
                                   certain  directors and executive  officers of
                                   Ketchum in the Merger that are in addition to
                                   the   interests   of   Ketchum   Shareholders
                                   generally,  see "The Merger Agreement and the
                                   Merger--Interests  of Ketchum's Management in
                                   the Merger".

Certain Federal
Income Tax Consequences ........   The  Merger  is  intended  to be a  tax  free
                                   reorganization  within the meaning of Section
                                   368(a) of the United States Internal  Revenue
                                   Code of 1986,  as amended  (the  "Code").  In
                                   general,  the Ketchum  Shareholders  will not
                                   recognize  gain or loss  as a  result  of the
                                   exchange of Ketchum Stock for Omnicom  Common
                                   Stock as a  result  of the  Merger.  However,
                                   receipt of cash in lieu of fractional  shares
                                   or in connection  with appraisal  rights as a
                                   dissenting   shareholder  may  give  rise  to
                                   taxable income. See "The Merger Agreement and
                                   the   Merger--Other   Considerations--Federal
                                   Income     Tax     Consequences."     Ketchum
                                   Shareholders   should   consult   their   tax
                                   advisors  regarding the tax  consequences  of
                                   the  Merger  to  them  in  their   particular
                                   circumstances.

Accounting Treatment...........    The   Merger   will   be   accounted  for  by
                                   Omnicom   as   a   pooling-of-interests   for
                                   financial  reporting  purposes in  accordance
                                   with    generally     accepted     accounting
                                   principles. See "The Merger Agreement and the
                                   Merger--Other      Considerations--Accounting
                                   Treatment".

Regulatory Approvals ...........   Omnicom and Ketchum  each filed  notification
                                   and report forms under the Hart-Scott  Rodino
                                   Antitrust   Improvements   Act  of  1976,  as
                                   amended  (the  "Hart-Scott-Rodino  Act") with
                                   the Federal Trade  Commission (the "FTC") and
                                   the   Antitrust   Division   of  the  Justice
                                   Department  (the  "Antitrust   Division")  on
                                   _________,  1996,  and each was advised  that
                                   there was early termination of the applicable
                                   waiting  period on  _____________,  1996. See
                                   "The Merger  Agreement and the  Merger--Other
                                   Considerations--Regulatory Approvals".

Resales of Omnicom   
Common  Stock ..................   Resales  of  Omnicom  Common Stock by Ketchum
                                   Shareholders    who   are    deemed   to   be
                                   "affiliates"  (as  such  term  is  understood
                                   under the Securities Act) of Ketchum prior to
                                   the   Merger   may  be   subject  to  certain
                                   restrictions.  See "The Merger  Agreement and
                                   the Merger--Other  Considerations--Resales of
                                   Omnicom Common Stock".

Dissenters' Rights ............    Holders of  Ketchum  Stock  who  dissent from
                                   the Merger in  accordance  with  Pennsylvania
                                   law are  entitled to  appraisal  rights.  See
                                   "The Merger  Agreement and the  Merger--Other
                                   Considerations--Rights  of Dissenting Ketchum
                                   Shareholders".

         The Escrow Agreement and the Ketchum Shareholder Representative

The Escrow Agreement ...........   As  described  above  under  "Description  of
                                   Certain    Terms    of    the    Merger    --
                                   Indemnification Obligations", indemnification
                                   obligations   arising   out  of  the   Merger
                                   Agreement  will be  satisfied  from shares of
                                   Omnicom  Common Stock placed into the General
                                   and Special  Escrow Funds  established  under
                                   the Escrow Agreement. The General Escrow Fund
                                   will  consist  of  shares of  Omnicom  Common
                                   Stock  having an  aggregate  Market  Value of
                                   $4,400,000;  the  Special  Escrow  Fund  will
                                   consist  of shares of  Omnicom  Common  Stock
                                   having   an   aggregate   Market   Value   of
                                   $2,500,000.

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                                       10
<PAGE>

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                                   Each of the Ketchum Common  Shareholders will
                                   be  depositing  his  pro  rata  share  of the
                                   General  Escrow  Fund or Special  Escrow Fund
                                   determined  by   multiplying   the  aggregate
                                   number of shares of Omnicom Common Stock by a
                                   fraction,  the  numerator  of  which  is  the
                                   number  of  shares of  Omnicom  Common  Stock
                                   issuable to such individual in the Merger and
                                   the  denominator of which is the total number
                                   of shares of Omnicom Common Stock issuable to
                                   all Ketchum Common  Shareholders,  rounded up
                                   to the nearest whole share.

                                   Based upon the  assumptions  set forth  above
                                   under  "Conversion of Ketchum Stock",  of the
                                   [$119.85]   Common  Stock   Conversion  Price
                                   payable  in  respect of each share of Ketchum
                                   Common Stock,  Omnicom Common Stock having an
                                   aggregate  Market Value of [$11.73]  would be
                                   deposited  in the General  Escrow  Fund,  and
                                   Omnicom  Common  Stock  having  an  aggregate
                                   Market Value of [$6.67] would be deposited in
                                   the Special  Escrow  Fund.  Since the amounts
                                   held in such  Escrow  Funds  are  subject  to
                                   claims in respect of contingent  liabilities,
                                   there can be no  assurance  that amounts held
                                   therein  will in fact be  distributed  to the
                                   Ketchum Common Shareholders.

                                   For purposes of satisfying  any claims,  each
                                   share of Omnicom  Common  Stock  deposited in
                                   either  Escrow  Fund  will be  valued  at the
                                   Market    Value,    regardless    of   actual
                                   fluctuations  in  the  market  value  of  the
                                   Omnicom  Common  Stock  after the date of the
                                   Closing of the Merger Agreement.

                                   See "The  Escrow  Agreement  and the  Ketchum
                                   Shareholder   Representative  --  The  Escrow
                                   Agreement".

Appointment of the
Ketchum Shareholder
Representative .................   It is a condition to Closing under the Merger
                                   Agreement   that  the  Ketchum   Shareholders
                                   appoint     the      Ketchum      Shareholder
                                   Representative  to  act as  their  collective
                                   agent   in   connection   with   the   Escrow
                                   Agreement,  including one or more alternative
                                   individuals to act as the Ketchum Shareholder
                                   Representative   in  the   event   that   the
                                   designated  Representative  shall  have died,
                                   resigned,  or otherwise  become  incapable or
                                   unwilling to act as Representative.

                                   Appointment   of  the   Ketchum   Shareholder
                                   Representative  shall  include  the  specific
                                   authorization for such  Representative to (i)
                                   execute and deliver the Escrow  Agreement and
                                   any documents  incident or ancillary thereto,
                                   including without  limitation any amendments,
                                   cancellations,   extensions   or  waivers  in
                                   respect  thereof;  (ii)  respond  to and make
                                   determinations in respect of the assertion of
                                   any and all  claims  for  indemnification  by
                                   Omnicom,  and to  assert  claims on behalf of
                                   the  Ketchum  Shareholders,  pursuant  to the
                                   terms of the Escrow  Agreement  and the terms
                                   of the Merger Agreement  pertaining  thereto;
                                   (iii)  execute and  deliver any stock  powers
                                   which may be  required  to be executed by any
                                   Ketchum  Shareholder  in order to permit  the
                                   delivery  to Omnicom of any shares of Omnicom
                                   Common  Stock to be  delivered to it pursuant
                                   to the  Escrow  Agreement;  and (iv) take all
                                   such  other  actions as may be  necessary  or
                                   desirable  to carry out his  responsibilities
                                   as   collective    agent   of   the   Ketchum
                                   Shareholders   in   respect   of  the  Escrow
                                   Agreement.

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                                       11


<PAGE>

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                                   The proposal before the Ketchum  Shareholders
                                   is  that  Paul H.  Alvarez  be  appointed  as
                                   Ketchum  Shareholder   Representative,   with
                                   Edward L. Graf  appointed as  alternate.  See
                                   "The   Escrow   Agreement   and  the  Ketchum
                                   Shareholder  Representative -- Appointment of
                                   the Ketchum Shareholder Representative."

Recommendation of the
Ketchum ........................   Board of Directors  The Board of Directors of
                                   Ketchum    recommends    that   the   Ketchum
                                   Shareholders approve the Escrow Agreement and
                                   the  appointment  of Paul H.  Alvarez  as the
                                   Ketchum   Shareholder   Representative,   and
                                   Edward L. Graf as alternate.

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                                       12
<PAGE>

                           COMPARATIVE PER SHARE DATA

     Set forth below are unaudited book value,  cash dividends  declared and net
income  (loss) per common  share data of Omnicom and Ketchum on both  historical
and pro forma  combined  bases,  which  information  has been  adjusted  to give
retroactive  effect to the  two-for-one  stock split in the form of a 100% stock
dividend paid to holders of record of Omnicom Common Stock on December 15, 1995.
Pro forma  combined cash dividends  declared per common share  reflects  Omnicom
cash dividends  declared in the periods  indicated.  Pro forma net income (loss)
per common share is calculated under the pooling-of-interests  accounting method
and assumes that the Merger had occurred  immediately  prior to the period being
reported upon. The pro forma  combined data has been  calculated  based upon the
material  assumptions  that the Common Stock Conversion Price would be [$119.85]
per share of Ketchum Common Stock and the Preferred Stock Conversion Price would
be $1,000  per share of Ketchum  Preferred  Stock;  and the Market  Value of the
Omnicom Common Stock will be $41. The information set forth below should be read
in conjunction with the respective audited and unaudited financial statements of
Omnicom incorporated by reference in this  Prospectus/Information  Statement and
of Ketchum included in this Prospectus/Information Statement.

                                                    As of December 31, 1995
                                                    -----------------------
Book Value per Common Share:
   Omnicom......................................            $7.39
   Ketchum......................................            (1.42)
   Pro forma....................................             7.36

                                                     Year Ended December 31,
                                               ---------------------------------
                                                1995         1994         1993
                                                ----         ----         ----
Cash Dividends Declared per Common Share:
   Omnicom .................................   $0.66        $0.62        $0.62
   Ketchum..................................    1.00         1.00         1.00
   Pro forma ...............................    0.65         0.61         0.61

Net Income (Loss) per Common Share:
   Omnicom
      Primary ..............................    1.89         1.58         1.03
      Fully diluted ........................    1.85         1.54         1.01
   Ketchum                                                             
      Primary ..............................  (21.82)        3.67       (10.55)
      Fully diluted ........................  (21.82)        3.67       (10.55)
   Pro forma                                                           
      Primary ..............................    1.75         1.57         0.91
      Fully diluted ........................    1.72         1.53         0.91

                                       13
<PAGE>

                                MARKET PRICE DATA

     There is no public  market for Ketchum  Common  Stock or Ketchum  Preferred
Stock. For each calendar quarter during 1993, 1994 and 1995,  Ketchum has paid a
dividend  on the  Ketchum  Common  Stock in the amount of $.25 per share,  and a
dividend on the Ketchum Preferred Stock in the amount of $22.50 per share.

     Omnicom  Common Stock is listed on the New York Stock  Exchange.  The table
below sets forth, for the calendar quarters indicated, the reported high and low
sale prices of Omnicom  Common Stock as reported on the New York Stock  Exchange
Composite  Tape,  in each case based on  published  financial  sources,  and the
dividends  paid per share on the Omnicom  Common  Stock for such  periods.  This
information has been adjusted to reflect the two for one stock split in the form
of a 100% stock dividend payable to holders of record of Omnicom Common Stock on
December 15, 1995.


                                                   Omnicom Common Stock
                                        ----------------------------------------
                                        High                Low        Dividends
                                        ----                ----       ---------
1993
   First Quarter ...................    23 3/4             19 3/16       $.155
   Second Quarter ..................    23 5/8             19 1/8         .155
   Third Quarter ...................    23 1/8             18 1/2         .155
   Fourth Quarter ..................    23 1/4             20 3/4         .155

1994
   First Quarter ...................    24 15/16           21 7/8         .155
   Second Quarter ..................    24 3/4             22 7/16        .155
   Third Quarter ...................    25 3/4             24             .155
   Fourth Quarter ..................    26 7/8             24 1/2         .155

1995
   First Quarter ...................    28 7/16            25             .155
   Second Quarter ..................    30 13/16           27 1/16        .155
   Third Quarter ...................    33                 29 5/16        .175
   Fourth Quarter ..................    37 1/4             31 3/16        .175

- ------------
     On March 6, 1996,  the last full  trading  day prior to the  execution  and
delivery of the Merger  Agreement,  the closing price of Omnicom Common Stock on
the New York Stock Exchange Composite Tape was $41 per share.

     On [                     ], 1996,  the most recent  practicable  date prior
to the printing of this  Prospectus/Information  Statement, the closing price of
Omnicom Common Stock on the New York Stock Exchange Composite Tape was $[ _____]
per share.

                                       14
<PAGE>

                               THE SPECIAL MEETING

                     Date, Time and Place of Special Meeting

     This Prospectus/Information  Statement is being furnished to the holders of
Ketchum Common Stock and Ketchum  Preferred Stock in connection with the Special
Meeting of Ketchum  Shareholders to be held on ________ 1996 at ____ A.M. (local
time), at Six PPG Place, Pittsburgh, Pennsylvania 15222.

     This Prospectus/Information  Statement is first being mailed to the Ketchum
Shareholders on or about May 1, 1996.


                Business to be Transacted at the Special Meeting

     At the Special Meeting,  Ketchum  Shareholders  will consider and vote upon
the following matters (collectively the "Ketchum Vote Matters"):

          1. A proposal to approve  the Merger  Agreement  and the  transactions
     contemplated  thereby,  including without  limitation the Merger of OmniSub
     with and into  Ketchum  pursuant  to the  Merger  Agreement  such  that the
     surviving corporation of such Merger shall be a wholly-owned  subsidiary of
     Omnicom,  and each share of Ketchum Stock shall be converted into the right
     to receive shares of Omnicom Common Stock, as more fully described herein;

          2. A proposal to approve  the Escrow  Agreement  and the  transactions
     contemplated thereby, and to appoint Paul H. Alvarez as Ketchum Shareholder
     Representative  and  Edward L. Graf as  alternate,  to act on behalf of the
     Ketchum Common Shareholders under the terms of the Escrow Agreement; and

          3. Such other  proposals  as may  properly  come  before  the  Special
     Meeting or any adjournment thereof.

     None of the proposals  shall become  effective  unless all of the proposals
are adopted by the requisite vote of the Ketchum Shareholders.


                           Record Date; Voting Rights

     Only  shareholders of record of Ketchum Common Stock and Ketchum  Preferred
Stock as at the close of business on _________, 1996 will be entitled to vote at
the Special  Meeting.  On that  Record  Date there were  issued and  outstanding
[374,967]  shares of Ketchum Common Stock and 6,282 shares of Ketchum  Preferred
Stock.  Each share of  Ketchum  Stock is  entitled  to one vote per share on the
Ketchum Vote Matters at the Special Meeting or any  adjournment  thereof whether
such  vote is cast as part of a vote of the  Ketchum  Common  Stock  or  Ketchum
Preferred Stock voting separately as a class, or as part of a collective vote of
all Ketchum Stock.


                               Voting Requirements

     The presence of the holders of a majority of the voting power of all shares
of Ketchum  Common Stock and of the holders of a majority of the voting power of
all shares of Ketchum  Preferred  Stock,  in each case  entitled  to vote on the
Record Date, is necessary to constitute a quorum for the transaction of business
at the Special Meeting.

     Under the Pennsylvania  Business  Corporation Law of 1988 (the "PABCL") and
the Ketchum Articles of Incorporation (the "Ketchum Articles"),  the approval of
the Merger Agreement and the transactions  contemplated thereby will require the
affirmative  votes of the  holders of a majority of the  Ketchum  Common  Stock,
voting as a class,  and of the holders of a majority  of the  Ketchum  Preferred
Stock,  voting  as a  class.  The  approval  of the  Escrow  Agreement  and  the
appointment of the Ketchum  Shareholder  Representative,  or the approval of any
other  proposals as may  properly be brought  before the Special  Meeting,  will
require the  affirmative  vote of the holders of a majority of the voting  power
represented  by the  outstanding  shares of  Ketchum  Common  Stock and  Ketchum
Preferred Stock, voting together as a single class.  Abstentions have the effect
of negative votes.

     Notwithstanding  the provisions of Pennsylvania  law, the Merger  Agreement
requires as a condition of the Closing of the Merger  Agreement  that all of the
shares of Ketchum Stock held by the Ketchum  Profit Sharing Plan shall have been
voted in favor of the Merger.

                                       15
<PAGE>

                              Management Ownership

     As of the Record Date,  directors  and  executive  officers of Ketchum as a
group  owned  an  aggregate  of  [203,458]   shares  of  Ketchum  Common  Stock,
representing [54.26%] of the outstanding shares of Ketchum Common Stock; and the
Ketchum  Profit  Sharing  Plan  owned an  aggregate  of 6,282  shares of Ketchum
Preferred  Stock,  representing  100%  of  the  outstanding  shares  of  Ketchum
Preferred  Stock.  Each of these  persons and the Trustee of the Ketchum  Profit
Sharing Plan has  expressed  an  intention to vote in favor of the  transactions
contemplated  herein.  Accordingly,  the Ketchum Vote Matters can be approved by
the affirmative vote of such persons even if all other Ketchum Shareholders vote
against the proposals.

     No proxies are being solicited in connection with the Special Meeting.


                       THE MERGER AGREEMENT AND THE MERGER

     (The  information  contained in this  Registration  Statement of which this
Prospectus/Information  Statement  forms a part is  qualified in its entirety by
reference to the  complete  text of the Merger  Agreement,  which is filed as an
Exhibit thereto and is incorporated herein by reference.)


    Background of and Ketchum's Reasons for the Merger; Recommendation of the
                           Ketchum Board of Directors

Overview

     After  the  Merger  is  effective,  Ketchum  will  continue  as a  separate
subsidiary of Omnicom and continue to conduct its business through three primary
operating divisions,  Ketchum Public Relations,  Ketchum Advertising and Ketchum
Directory  Advertising.  It is anticipated  that the senior  management of these
significant operating divisions of Ketchum will continue to serve as officers of
such operating divisions. Paul H. Alvarez, the Chairman, Chief Executive Officer
and  President of Ketchum,  will become  employed by Omnicom as Vice Chairman of
its Diversified Agency Services division and will remain an officer and director
of Ketchum.  See "The Merger  Agreement  and the Merger --  Interests of Ketchum
Management  in  the  Merger"  for  a  description  of  proposed  employment  and
non-competition  agreements between Ketchum and certain officers of Ketchum,  to
be entered into upon the Closing of the Merger Agreement.

     The  initial  Board of  Directors  of  Ketchum  immediately  following  the
Effective  Time of the  Merger  will be  composed  of three  directors:  Paul H.
Alvarez, Peter I. Jones (who is currently the President of Omnicom's Diversified
Agency Services  division),  and Barry J. Wagner (who is currently the Secretary
of Omnicom).

     The  terms of the  Merger  Agreement,  including  the  terms of the  Escrow
Agreement,  are the result of arm's-length  negotiations between representatives
of Omnicom and representatives of Ketchum.


Background of the Merger

     In  1992,  Ketchum's  Board  of  Directors  (sometimes  referred  to as the
"Ketchum  Board") began a process of strategic  planning for the corporation and
also had  each of its  divisions  engage  in  similar  planning.  The  divisions
included the largest two, Advertising and Public Relations, as well as Directory
Advertising and two smaller operations.

     From an  overall  corporate  standpoint,  Ketchum  recognized  three  major
challenges: (i) first, to make its advertising division competitive for mid-size
and larger  clients;  this  required a substantial  international  network and a
strong presence in selected cities;  (ii) second,  to ensure the availability of
capital to allow Ketchum to purchase the shares of retiring  shareholders and to
allow for normal capital  replacement  as well as for growth and expansion;  and
(iii) third, the Ketchum Board determined that the  communication  opportunities
afforded in what has been called  "interactive"  communications  represented  an
excellent opportunity for all of the divisions of Ketchum.

                                       16
<PAGE>

     As a result of this analysis,  Ketchum first formed an interactive  unit to
serve as a resource to all of the  divisions  and to serve  clients  directly as
well. Next, the Executive  Committee of the Ketchum Board (sometimes referred to
as  the  "Ketchum  Executive   Committee")   reviewed  several  capital  raising
alternatives,  including an initial public offering,  obtaining an individual or
institutional  equity  partner  (not from the  advertising  or public  relations
industries)  and making use of an employee stock  ownership  plan  ("ESOP"),  to
provide continuing capital.

     For a time, the Ketchum  Executive  Committee pursued the ESOP alternative.
In the spring of 1995 Ketchum  received an  unsolicited  expression  of interest
from a major  advertising  agency to acquire  Ketchum.  This offer was for fewer
than all of the Ketchum  operating  units and  involved a  contingent  valuation
formula; the discussions never reached a level which would lead to evaluation by
the Ketchum Board.  However,  it was this offer which led the Ketchum  Executive
Committee  to  consider  other  acquisition  opportunities.   In  pursuing  this
alternative,  Ketchum  engaged  AdMedia  to assist  them in  finding a  suitable
partner. In 1995, AdMedia initiated discussions with Omnicom.

     After  several  meetings  with  Omnicom,   including  detailed  reviews  of
Ketchum's balance sheet and financial statements,  an agreement in principle was
reached  between the parties.  Ketchum held a Board  meeting  January 4, 1996 at
which  the  Ketchum   Board   approved  in  principle  the  Merger  and  related
transactions and determined to discontinue  discussions with the other agency. A
press release announcing the proposed Merger was issued on January 10, 1996, and
the parties executed and delivered the Merger Agreement on March 7, 1996.

Ketchum's Reasons for the Merger

     The Ketchum Board of Directors has determined that the Merger Agreement and
the Merger are  advisable  and in the best  interests of Ketchum and the Ketchum
Shareholders and has approved the Merger Agreement and Merger.

     In reaching  the  determination  that the Merger  Agreement  is in the best
interests  of  Ketchum,  the  Ketchum  Board  considered  a number  of  factors,
including, without limitation, the following:

     (i)    The  Ketchum  Board's   assessment  that  the  Ketchum   Advertising
            operations  could  more  fully  realize  their  long-term  strategic
            objectives by affiliating with a substantially  larger agency,  such
            as  Omnicom,   thereby   affording   Ketchum   access  to  Omnicom's
            international   service   facilities,   clients  and  financial  and
            managerial resources.

     (ii)   Ketchum's  Public  Relations  agency  could more fully  realize  its
            long-range  strategic  objectives by working  within  Omnicom,  with
            access to Omnicom's  financial  resources and its clients.  It would
            also allow them to have access to Omnicom's extensive  international
            service facilities.

     (iii)  Ketchum Directory  Advertising would benefit from the opportunity to
            service Omnicom clients.

     (iv)   Ketchum  Shareholders would receive a marketable security of Omnicom
            in exchange for their illiquid interest in Ketchum.

     (v)    The  belief  of the  Ketchum  Board  and  Executive  Committee  that
            Omnicom's  proposal was more favorable than the purchase proposal of
            the other agency.

     (vi)   The terms of the Merger  Agreement as reviewed by the Ketchum  Board
            with its legal and financial advisors.

     (vii)  Information  relating  to  the  financial   condition,   results  of
            operations, capital levels and prospects of Ketchum and management's
            best estimates of the prospects of Ketchum.

     (viii) The current and prospective environment in which Ketchum Advertising
            operates   including   national  and  local   conditions,   and  the
            competitive environment for advertising generally.

     (ix)   Information  relating  to the tax  consequences  of the  Merger  for
            Ketchum and for the Ketchum Shareholders.

                                       17
<PAGE>

     The foregoing  discussion of the information  and factors  discussed by the
Ketchum  Board is not meant to be  exhaustive  but is  believed  to include  all
material  factors  considered  by the Ketchum  Board.  The Ketchum Board did not
quantify  or  attach  any  particular  weight  to the  various  factors  that it
considered in reaching its determination that the Merger is in the best interest
of the Ketchum Shareholders.

Recommendation of the Ketchum Board of Directors

     For the reasons set forth above, the Ketchum Board believes that the Merger
is fair to, and in the best interests of,  Ketchum and the Ketchum  Shareholders
and recommends that the Ketchum Shareholders vote FOR the approval of the Merger
Agreement and the transactions contemplated thereby.

                        Omnicom's Reasons for the Merger

     Omnicom's  Board of  Directors  believes  that  the  Merger  represents  an
opportunity to strengthen the reach of its Diversified  Agency Services division
through the  acquisition  of a  full-service  marketing  communication  services
company with particular  strengths in public  relations,  consumer  advertising,
directory advertising and other related activities.

      Omnicom has not retained an outside party to evaluate the proposed  Merger
but has instead relied upon the knowledge of its  management in considering  the
financial aspects of the Merger.

     In reaching its  conclusion,  the Omnicom  Board of  Directors  considered,
among other  things,  (i)  information  concerning  the  financial  performance,
condition,  business operations and prospects of Ketchum;  and (ii) the proposed
terms and  structure of the Merger.  It is  anticipated  that the Merger will be
non-dilutive to Omnicom's results of operations. Accordingly, Omnicom's Board of
Directors has unanimously approved the Merger and the transactions  contemplated
thereby.

                                       18
<PAGE>

                 Interests of Ketchum's Management in the Merger

     (The following  describes  certain interests of the directors and executive
officers  of Ketchum in the Merger  that are in  addition  to the  interests  of
Ketchum Shareholders generally.)

     Pursuant to the Merger  Agreement,  Omnicom  will enter into an  employment
agreement  with Paul H.  Alvarez,  the  Chairman,  Chief  Executive  Officer and
President  of Ketchum and one of its  directors,  pursuant to which Mr.  Alvarez
would be  employed  as the Vice  Chairman  of the  Diversified  Agency  Services
division of Omnicom.  In addition,  pursuant to the Merger  Agreement,  KCI will
enter into employment  agreements with each of the following  executive officers
of  Ketchum:  David R.  Drobis,  John C.  Joseph,  Raymond  L.  Kotcher,  Dianne
Snedaker, Lorraine Thelian, Lawrence R. Werner and Edward L. Graf.
      
     It is  anticipated  that,  except as indicated  below,  the new  employment
agreements  will have a term  commencing at the Effective  Time and ending three
years thereafter (subject to an "evergreen"  provision  terminable on one year's
notice by Ketchum  and six  months'  notice by the  executive),  and provide for
annual salary  compensation and fringe benefits  substantially  the same as such
persons were receiving immediately prior to the Merger. The employment agreement
for Mr. Graf will have a term  commencing at the  Effective  Time and ending one
year thereafter (subject to the same "evergreen" provision terminable on 30 days
notice).  In the event Mr. Graf's employment is terminated by Ketchum other than
for cause,  Mr. Graf will be entitled  to receive one year's  severance  pay. In
addition,  on March 2, 1996 the existing employment agreement between KCI and J.
Craig Mathiesen,  a director and key executive of Ketchum, was extended from its
March 2, 1996 expiration date for a period up to two years.

     In  addition,  pursuant to the terms of the Merger  Agreement,  each of the
executives  who is entering  into an  employment  agreement as described  above,
including Mr. Mathiesen,  will also enter into a non-competition  agreement with
Omnicom and Ketchum.  Robert C. Feldman and James V. Ficco, who are directors of
Ketchum,  will also enter into a  non-competition  agreement  with  Omnicom  and
Ketchum.  There is no additional  consideration  being paid in  connection  with
these non-competition agreements.

                  Procedure for Distributing Shares of Omnicom
                      Common Stock to Ketchum Shareholders

     A transmittal form will be furnished to Ketchum  Shareholders  prior to the
Effective  Time  of the  Merger  for  use  in  transmitting  their  certificates
evidencing  their  shares of  Ketchum  Stock to  Omnicom  to  exchange  them for
certificates evidencing the Omnicom Common Stock to which they are entitled as a
result  of the  Merger.  The  instructions  on the form of  transmittal  must be
complied with by each surrendering shareholder.

     On or as soon as  practicable  after the  Closing of the Merger  Agreement,
each Ketchum  Shareholder  shall receive by first-class  mail in accordance with
the  instructions  of  such  Ketchum  Shareholder  as  set  forth  in his or her
transmittal  form, a certificate  or  certificates  representing  the next lower
number of whole shares of Omnicom  Common Stock into which the shares of Ketchum
Stock  represented by the certificate or certificates of Ketchum Common Stock or
Ketchum Preferred Stock so surrendered shall have been converted pursuant to the
Merger and, in addition,  cash in lieu of a  fractional  share that such Ketchum
Shareholder  is entitled to receive,  subject in the case of the Ketchum  Common
Stock to the provisions of the Escrow Agreement  described  below.  Each Ketchum
Common  Shareholder will also receive a receipt  indicating the number of shares
of Omnicom Common Stock being held in the General Escrow Fund and Special Escrow
Fund in the name of such Ketchum Shareholder.

     Dividends  and other  distributions  which may be  payable  by  Omnicom  to
holders of record of Omnicom  Common  Stock as of a date on or after the date of
the Closing of the Merger  Agreement and which are paid prior to the delivery of
Omnicom Common Stock to Ketchum Shareholders  entitled thereto,  will be paid to
such former  Ketchum  Shareholders  at the same time the Omnicom Common Stock is
transferred to them upon surrender of certificates  representing their shares of
Ketchum  Stock.  Such  former  shareholders  will not be entitled to interest or
earnings on such dividends or other distributions pending receipt.

                                       19
<PAGE>

                              The Merger Agreement

The Merger

     Under the  terms of the  Merger  Agreement,  at the  Effective  Time of the
Merger,  OmniSub will be merged with and into Ketchum,  whose separate corporate
existence will continue as a wholly-owned subsidiary of Omnicom.


Conversion Prices

     Under  the terms of the  Merger  Agreement,  at the  Effective  Time,  each
outstanding  share of Ketchum  Stock will be  converted  into  shares of Omnicom
Common Stock based upon the  Conversion  Prices  described  below and the Market
Value of the Omnicom Common Stock. No fractional  shares of Omnicom Common Stock
will be issued but in lieu  thereof  each holder of shares of Ketchum  Stock who
would  otherwise  have been entitled to a fraction of a share of Omnicom  Common
Stock will be paid the cash  value of such  fraction  of a share  based upon the
Market Value thereof.

     The "Common Stock  Conversion  Price" will result in an amount per share of
Ketchum Common Stock equal to  $44,940,000  divided by the number of outstanding
shares of Ketchum Common Stock;  the  "Preferred  Stock  Conversion  Price" will
result  in an  amount  per  share  of  Ketchum  Preferred  Stock  equal  to  its
liquidation  preference of $1,000.  These dollar  amounts will then be converted
into a number of shares of Omnicom  Common  Stock  based upon the average of the
closing  prices  per share of the  Omnicom  Common  Stock on the New York  Stock
Exchange  during the 20  consecutive  trading  days ending three  business  days
immediately prior to the date of the Special Meeting. Accordingly,  although the
actual  conversion  exchange  rates cannot be  calculated as of the date of this
Prospectus/Information  Statement, they will be known by the date of the Special
Meeting and will be available to the attendees thereof.

     Based upon the assumption as set forth in the Summary under "Description of
Certain Terms of the Merger Agreement -- Conversion of Ketchum Stock" that there
would be [374,967]  shares of Ketchum Common Stock  outstanding at the Effective
Time of the  Merger,  subject to the  obligation  to  deposit  shares of Omnicom
Common Stock into the Escrow Funds pursuant to the Escrow Agreement,  each share
of Ketchum  Common Stock would be converted  into the right to receive shares of
Omnicom Common Stock having an aggregate  Market Value of [$119.85];  based upon
the Market Value of $41,  this would equate to [2.92]  shares of Omnicom  Common
Stock for each share of Ketchum  Common Stock.  Each share of Ketchum  Preferred
Stock would be  converted  into the right to receive  [24.39]  shares of Omnicom
Common Stock.

     The Closing of the Merger Agreement has been scheduled for         ,  1996,
the day after the date of the  Special  Meeting.  However,  the  Closing  of the
Merger  Agreement may be delayed beyond         ,  1996 if all conditions of the
Merger  have not  been  satisfied  or  waived  by such  date;  there  will be no
adjustment to the  Conversion  Prices if this occurs,  notwithstanding  that the
actual value of the Omnicom Common Stock could fluctuate between the date of the
Special Meeting and the date of the Closing of the Merger Agreement. At the time
this   Prospectus/Information   Statement   is  being   mailed  to  the  Ketchum
Shareholders,  Omnicom  has no reason to believe  that the Closing of the Merger
Agreement will not be held on          , 1996 as scheduled.


Indemnification Obligations

     Under the Merger Agreement, the Ketchum Common Shareholders are required to
indemnify,  defend and hold harmless Omnicom and OmniSub,  and their affiliates,
directors,  officers and for (i) liabilities,  obligations,  losses,  penalties,
claims, actions, judgments or causes of action,  assessments,  costs or expenses
(including, without limitation, reasonable attorneys' fees and disbursements) as
a  consequence  of or in  connection  with  any  inaccuracy  or  breach  of  any
representation, warranty or covenant of Ketchum contained in or made pursuant to
the Merger Agreement, but only to the extent, with certain exceptions, that such
losses  exceed  $100,000  and (ii) any  expenses  being  incurred  by Ketchum in
connection  with the ongoing  reorganization  of the media buying  operations of
KCI.  Holders  of  Ketchum  Preferred  Stock are not  required  to  provide  any
indemnification under the Merger Agreement.

     To  satisfy  these   indemnification   obligations,   the  Ketchum   Common
Shareholders will deposit shares of Omnicom Common Stock into the General Escrow
Fund and the Special Escrow Fund under the Escrow Agreement.  The General Escrow
Fund will contain  shares of Omnicom  Common  Stock  having an aggregate  Market


                                       20
<PAGE>

Value of $4,400,000 and will be used to satisfy the indemnification  obligations
described under clause (i) of the preceding  paragraph;  the Special Escrow Fund
will contain shares of Omnicom Common Stock having an aggregate  Market Value of
$2,500,000 and will be used to satisfy the indemnification obligations described
under  clause  (ii)  of the  preceding  paragraph.  Indemnification  obligations
arising under clause (i) may be satisfied only from the General Escrow Fund, and
those  arising under clause (ii) may be satisfied  only from the Special  Escrow
Fund. Each Ketchum Common  Shareholder  will be depositing his pro rata share of
the General  Escrow Fund or Special Escrow Fund (rounded up to the nearest whole
share).  Accordingly,  of the shares of Omnicom Common Stock issuable in respect
of each share of Ketchum Common Stock,  shares of Omnicom Common Stock having an
aggregate  Market Value of [$11.73]  will be deposited  into the General  Escrow
Fund and shares of Omnicom  Common  Stock  having an  aggregate  Market Value of
[$6.67] will be deposited into the Special Escrow Fund.

     The indemnification obligations of the Ketchum Common Shareholders, will be
limited to and satisfied solely from, the General Escrow Fund and Special Escrow
Fund  under the  Escrow  Agreement  (such that  neither  Omnicom  nor any of its
affiliates will have any recourse for the payment of any losses or other damages
arising out of the transactions contemplated by the Merger Agreement against any
Ketchum Shareholder,  nor shall any Ketchum Shareholder be personally liable for
any such losses or damages).  Indemnification obligations to be satisfied out of
the General Escrow Fund will  terminate on the earlier of the first  independent
audit report, if any, of the surviving  corporation following the Effective Time
of the Merger or one year from the Effective  Time (except that claims  asserted
in writing on or prior to such date will survive  until they are decided and are
final and binding on the parties).  Indemnification  obligations to be satisfied
out of the Special  Escrow Fund will  terminate on December 31, 1996,  being the
latest  date by which it will be  determined  whether  or not  costs  have  been
incurred in  connection  with the  ongoing  reorganization  of the media  buying
operations (except that claims asserted in writing on or prior to such date will
survive until they are decided and are final binding on the parties).

Representations and Warranties

     The  Merger  Agreement  contains  various  customary   representations  and
warranties of Ketchum relating to, among other things:  (a) the organization and
similar  corporate  matters of  Ketchum  and each of the  subsidiaries;  (b) the
capital  structure of Ketchum and each of its subsidiaries;  (c)  authorization,
execution,  delivery, performance and enforceability of the Merger Agreement and
related  matters;  (d) absence of conflicts under charters or by-laws,  required
consents or approvals and no violations of any agreements or laws; (e) financial
statements  provided  to Omnicom by  Ketchum;  (f)  absence of certain  material
adverse events,  changes or effects; (g) certain contracts,  including,  but not
limited to, certain real and personal property leases and employment, consulting
and benefit matters;  (h) litigation;  (i) certain tax matters;  (j) undisclosed
liabilities; (k) insurance; (l) compliance with law and licenses, authorizations
and  permits  held by Ketchum  necessary  to conduct  its  business;  (m) client
relations; (n) employment relations; (o) retirement and other employee plans and
matters  relating to the Employee  Retirement  Income  Security Act of 1974,  as
amended;  and  (p)  trademarks,   trade  names,  assumed  or  fictitious  names,
copyrights, logos, service marks and slogans.

     The Merger Agreement also contains various  customary  representations  and
warranties of Omnicom  relating to, among other  things:  (a)  organization  and
similar corporate matters of Omnicom and OmniSub;  (b) authorization,  execution
and delivery of the Merger  Agreement  and related  matters;  (c) absence of any
conflicts  under  charters or by-laws,  required  consents or  approvals  and no
violations of any  agreements or laws; (d) the shares of Omnicom Common Stock to
be issued in the transaction;  (e) financial  statements  provided to Ketchum by
Omnicom;  (f) absence of certain  adverse  events,  changes or effects;  and (g)
litigation.

Certain Covenants

     Pursuant  to the Merger  Agreement,  Ketchum  has agreed  that,  during the
period  from the  execution  of the Merger  Agreement  until the  Closing of the
Merger Agreement, Ketchum and each of its subsidiaries will, among other things:
(a) not solicit, initiate or encourage any other offer or inquiry concerning the
acquisition of Ketchum;  (b) give timely notice of a meeting to its shareholders
to approve  the Merger  Agreement  and the Escrow  Agreement  and to appoint the
Ketchum Shareholder  Representative;  (c) inform Omnicom's  management as to the
operation,  management and business of Ketchum;  (d) permit Omnicom to make such


                                       21
<PAGE>

reasonable investigation of the assets,  properties and businesses of Ketchum as
they deem necessary or advisable;  and (e) except (i) as permitted by the Merger
Agreement and (ii) as otherwise consented to in writing by Omnicom,  operate its
businesses  in the  ordinary  course  and,  to the extent  consistent  with past
practice,  use reasonable  commercial  efforts to preserve the existing business
organization, existing business relationships, and goodwill intact.

     Pursuant to the Merger  Agreement,  Omnicom has agreed to cause  Ketchum to
maintain  in effect  for three  years (or a lesser  period of time,  in  certain
events) the current policies of directors' and officers' liability insurance and
fiduciary liability  insurance  maintained by Ketchum, or to substitute therefor
policies containing substantially the same coverage.

     Pursuant to the Merger Agreement,  Ketchum and Omnicom have covenanted with
one another to take certain additional  actions,  including without  limitation:
(a) to each take all corporate and other action, make all filings with courts or
governmental authorities and use its reasonable efforts to obtain in writing all
approvals and consents  required to be taken, made or obtained by it in order to
effectuate the Merger; (b) to prepare this Prospectus/Information  Statement and
the Registration  Statement of which it is a part, with each party  representing
and warranting to the other as to the accuracy of the information supplied by it
for inclusion herein;  and (c) to each use its reasonable  efforts to consummate
the Merger and the other transactions contemplated by the Merger Agreement.

Certain Conditions to the Merger

     In addition to approval of the Merger Agreement,  the Merger and the Escrow
Agreement and the appointment of the Ketchum  Shareholder  Representative by the
Ketchum  Shareholders  at the Special  Meeting,  and to the required  regulatory
approvals,  the  respective  obligations  of  Omnicom,  OmniSub  and  Ketchum to
consummate  the Merger are subject to the  satisfaction  of certain  conditions,
including without  limitation:  (i) the accuracy in all material respects of the
representations and warranties made by the parties in the Merger Agreement; (ii)
the performance by the parties of their respective  obligations under the Merger
Agreement  prior to the  Closing;  (iii) the  absence  of any  material  adverse
changes in the condition of the businesses of Ketchum on the one hand or Omnicom
on the other hand; (iv) the  effectiveness of the  Registration  Statement under
the  Securities  Act with  respect to the shares of Omnicom  Common  Stock to be
issued pursuant to the Merger  Agreement and the approval of the listing of such
Omnicom  Common  Stock on the New York Stock  Exchange;  (v) the  execution  and
delivery of the Escrow  Agreement;  (vi) the absence of any action or proceeding
enjoining the transactions  contemplated by the Merger Agreement;  and (vii) the
absence of any action or proceeding by any governmental agency that might result
in enjoining the consummation of said transactions.

     The  obligations of Omnicom and OmniSub to effect the Merger are subject to
satisfaction of certain additional conditions including, without limitation: (i)
the  SEC's  not  having  objected  to  Omnicom's  treatment  of the  Merger as a
pooling-of-interests for accounting purposes; (ii) the execution and delivery of
employment  agreements  with key  executives  of Ketchum and the  execution  and
delivery of non-competition agreements by each of such individuals;  (iii) there
not having been a material  and adverse  change in the  business  and affairs of
Ketchum;  and (iv) holders of fewer than 3% of the outstanding shares of Ketchum
Common Stock having elected  dissenters'  rights, and the Trustee of the Ketchum
Profit Sharing Plan having voted all the shares of Ketchum Stock in favor of the
Ketchum Vote Matters.

     The  obligations  of  Ketchum  to effect  the  Merger  are  subject  to the
satisfaction of certain additional  conditions  including,  without  limitation,
Omnicom or  Ketchum,  as the case may be,  having  entered  into the  employment
agreements described above. See "The Merger Agreement and the  Merger--Interests
of Ketchum Management in the Merger."

     Pursuant to the terms of the Merger Agreement,  each of Omnicom and Ketchum
is entitled to waive any of its conditions to  consummation of the Merger to the
extent that any such  condition  is not  satisfied  in full by the other  party,
other than  conditions  relating to the  treatment of the Merger by the SEC as a
pooling-of-interests  for  accounting  purposes  and the approval of the Ketchum
Vote Matters by the Ketchum Shareholders.

                                       22
<PAGE>

Closing Date

      The Closing has been  scheduled  for  ________,  1996,  assuming  that all
conditions to closing the Merger Agreement have been satisfied or waived by such
date. At the time this  Prospectus/Information  Statement is being mailed to the
Ketchum Shareholders, Omnicom has no reason to believe that the Closing will not
take place on ________, 1996 as scheduled.

Termination

     The Merger Agreement may be terminated and the  contemplated  Merger may be
abandoned at any time prior to the Closing,  whether before or after approval by
the Ketchum  Shareholders,  (a) by mutual  consent of the Boards of Directors of
Omnicom,  OmniSub and Ketchum;  (b) by either  Omnicom and  OmniSub,  on the one
hand,  or  Ketchum,  on the  other  hand,  if there  has  been a  breach  of any
representation, warranty or covenant on the part of the other party set forth in
the Merger  Agreement  which breach has not been cured within 30 days  following
receipt by the  breaching  party of notice of such breach,  unless the breach of
any such  representation,  warranty,  or covenant does not materially  adversely
affect the  business or assets of the  breaching  party or the ability of either
party or parties to  consummate  the Merger;  (c) by the Board of  Directors  of
Omnicom,  OmniSub  or  Ketchum  if a final and  nonappealable  order,  decree or
judgment  of any court or other  governmental  authority  is issued  which would
enjoin  the  Merger;  or (d) by either  Omnicom  and  OmniSub  or Ketchum if the
Closing shall not have  occurred  prior to the close of business on December 31,
1996 or if the conditions to such parties' obligation to close shall have become
incapable of being satisfied by December 31, 1996.

Amendment

     The Merger Agreement and the exhibits and schedules thereto may be amended,
supplemented  or qualified by the parties only by an agreement in writing signed
by all parties with due authorization.

                              Other Considerations

Federal Income Tax Consequences

     (The following is a summary of the federal income tax  consequences  of the
Merger that are material to the Ketchum  Shareholders.  It is based upon certain
representations and assumptions as set forth in the opinion of Deloitte & Touche
LLP  filed  as  an  Exhibit  to  this  Registration   Statement  of  which  this
Prospectus/Information  Statement is a part. No opinion has been expressed as to
the state,  local or foreign tax  consequences.  In addition,  the  following is
general  in  nature  and  does  not  take  into  account  the   particular   tax
circumstances of any individual Ketchum Shareholder. It is recommended that each
Ketchum Shareholder consult his own tax advisors as to the specific consequences
of the proposed Merger for such individual, including the application and effect
of state, local and foreign laws.)

     The Merger has been  structured  to qualify as a "tax-free"  reorganization
within the meaning of the Code.  Deloitte & Touche LLP, Ketchum's tax advisor in
the Merger,  has rendered its opinion as to the federal income tax  consequences
of the  Merger.  The  opinion  of  Deloitte & Touche LLP is based upon the Code,
regulations  now  in  effect  thereunder,  current  administrative  rulings  and
practice,  and judicial authority,  all of which are subject to change. Unlike a
ruling from the Internal Revenue  Service,  the opinion of Deloitte & Touche LLP
is not binding upon the Internal  Revenue Service and there can be no assurance,
and none is hereby  given,  that the  Internal  Revenue  Service will not take a
position contrary to one or more of the positions  reflected therein or that the
opinion  will be upheld by the  courts if  challenged  by the  Internal  Revenue
Service.

     In the  opinion  of  Deloitte  & Touche  LLP,  which  opinion is based upon
various  representations  and subject to various assumptions and qualifications,
the following  federal income tax consequences,  among others,  will result from
the Merger.

          1. The Merger will constitute a  reorganization  within the meaning of
     Section 368(a) of the Code.

          2. No gain or loss will be recognized by Ketchum Shareholders upon the
     exchange of their Ketchum Stock (including  fractional share interests they
     might otherwise be entitled to receive) solely for Omnicom Common Stock.

                                       23
<PAGE>

          3. The holding  period of the Omnicom  Common  Stock will  include the
     holding  period for the Ketchum  Stock  surrendered  in exchange  therefor,
     provided  the  Ketchum  Stock  was held as a  capital  asset on the date of
     exchange.

          4. The  aggregate  basis of the  Omnicom  Common  Stock  received by a
     Ketchum   Shareholder   (including  any  fractional   share  interest  such
     Shareholder  might  otherwise  receive)  will be the same as the  aggregate
     basis of the Ketchum Stock surrendered in exchange therefor.

          5. The payment of cash in lieu of fractional shares will be treated as
     if the fractional  shares were distributed as part of the exchange and then
     redeemed by Omnicom. Any Ketchum Shareholder who receives cash in lieu of a
     fractional  share  interest in Omnicom  Common Stock will recognize gain or
     loss  measured by the  difference  between cash received in respect of such
     fractional  share and the portion of the basis of Ketchum  Stock  allocable
     thereto.  Similarly, a Ketchum Shareholder who dissents from the Merger and
     receives the "fair value" of his shares of Ketchum Stock in accordance with
     the PABCL (see  "Rights of  Dissenting  Ketchum  Shareholders"  below) will
     recognize gain or loss measured by the difference between the cash received
     and the basis of the Ketchum Stock.

     No ruling from the  Internal  Revenue  Service will be sought on any of the
foregoing federal tax consequences of the Merger.

     A copy of the opinion of Deloitte & Touche LLP has been filed as an Exhibit
to the Registration Statement of which this Prospectus/Information  Statement is
a part and is incorporated herein by reference.

Accounting Treatment

     Ketchum  and  Omnicom   expect  the  Merger  to  be  accounted   for  as  a
pooling-of-interests   for  financial  reporting  purposes  in  accordance  with
generally accepted accounting  principles.  Under pooling of interest accounting
upon consummation of the Merger,  the assets and liabilities of Ketchum would be
included in the  consolidated  balance sheet of Omnicom and its  subsidiaries in
the amounts which were included in the books of Ketchum  immediately  before the
Merger after  conforming  certain  accounting  policies and  procedures to those
currently used by Omnicom.

 Regulatory Approvals

     Under the  Hart-Scott-Rodino Act and the rules promulgated therewith by the
FTC, the Merger may not be consummated until  notifications  have been given and
certain information has been furnished to the FTC and the Antitrust Division and
specified waiting period  requirements have been satisfied.  Omnicom and Ketchum
each filed  notification and report forms under the  Hart-Scott-Rodino  Act with
the FTC and the Antitrust  Division on ____________,  1996. The required waiting
period under the  Hart-Scott-Rodino Act was terminated early on _______________,
1996.

     At any time  before or after  consummation  of the  Merger,  the  Antitrust
Division or the FTC could take such action under the antitrust  laws as it deems
necessary or desirable in the public interest,  including  seeking to enjoin the
consummation of the Merger or seeking  divestiture of assets of Omnicom.  At any
time before or after the Closing, and notwithstanding that the Hart-Scott-Rodino
Act waiting  period has  expired,  any state  could take such  action  under the
antitrust laws as it deems necessary or desirable in the public  interest.  Such
action could include seeking to enjoin the consummation of the Merger or seeking
divestiture  of assets of Omnicom.  Private  parties may also seek to take legal
action under the antitrust laws under certain circumstances.

     Based on information  available to them,  Omnicom and Ketchum  believe that
the Merger can be effected in compliance  with Federal and state antitrust laws.
However,  there can be no assurance that a challenge to the  consummation of the
Merger on antitrust  grounds will not be made or that, if such a challenge  were
made,  Omnicom  and  Ketchum  would  prevail or would not be  required to accept
certain  conditions,  possibly  including  certain  divestitures  of  assets  of
Omnicom, in order to consummate the Merger.

Resales of Omnicom Common Stock

      All shares of Omnicom Common Stock received by Ketchum  Shareholders  as a
result of the Merger will be freely transferable,  except that shares of Omnicom
Common Stock received by persons who are deemed to be "affiliates" (as such term
is understood under the Securities Act) of Ketchum prior to the Merger ("Ketchum


                                       24
<PAGE>

Affiliates") shall be subject to certain  restrictions,  as more fully described
below.  Persons  who may be  deemed  to be  affiliates  of  Ketchum  or  Omnicom
generally  include  individuals or entities that control,  are controlled by, or
are under common control with, such party and may include  certain  officers and
directors of such party as well as  principal  stockholders  of such party.  The
Merger  Agreement  provides  that  Ketchum  will  furnish  Omnicom  with  a list
identifying  all persons who may be  considered  to be Ketchum  Affiliates,  and
gives  Omnicom  the right to review such list and  require  changes.  Ketchum is
required  to use its best  efforts to cause each of the  Ketchum  Affiliates  to
execute a written  agreement  to comply  fully with the  restrictions  described
below, and the receipt of such written agreements from each Ketchum Affiliate is
a condition to Omnicom's obligation to consummate the Merger.

     Federal Securities Laws. Shares of Omnicom Common Stock received by Ketchum
Affiliates  may be  resold  by such  Ketchum  Affiliates  only  in  transactions
permitted by the resale  provisions of Rule 145 promulgated under the Securities
Act or as otherwise permitted under the Securities Act.

     Pooling-of-Interests  Rules.  In  order  to  satisfy  a  condition  of  the
pooling-of-interests  rules  as the  accounting  treatment  to be  accorded  the
Merger, Ketchum Affiliates may not sell, assign,  transfer,  convey, encumber or
dispose of, directly or indirectly,  or otherwise reduce their risk relative to,
any shares of  Omnicom  Common  Stock  until the  publication  by Omnicom of its
financial  results  covering  a  period  of at  least  thirty  days of  combined
operations of Omnicom and Ketchum after the Closing.  This prohibition precludes
the use of "hedging" techniques during this period.

Stock Exchange Listing

     It is a  condition  to the Merger that the shares of Omnicom  Common  Stock
required to be issued in connection with the Merger be authorized for listing on
the NYSE, subject to official notice of issuance. [An application has been filed
for listing such Omnicom Common Stock on the NYSE.]

Rights of Dissenting Ketchum Shareholders

     If the Merger is consummated,  under Section 1930 of the PABCL,  holders of
shares of Ketchum Stock with respect to which appraisal rights are perfected and
not withdrawn or lost, will be entitled to have the "fair value" of their shares
of  Ketchum  Stock at the  Effective  Time  (exclusive  of any  element of value
arising  from  the  accomplishment  or  expectation  of the  Merger)  judicially
determined  and  paid  to  them in cash by  complying  with  the  provisions  of
Subchapter D of Chapter 15 of the PABCL ("Subchapter D").

     The  following  is a brief  summary  of  Subchapter  D which sets forth the
procedures  for  dissenting  from the Merger and demanding  statutory  appraisal
rights.  This summary is qualified in its entirety by reference to Subchapter D,
a copy of the text of which is attached hereto as Annex I.

     Ketchum  Shareholders  of record who  desire to  exercise  their  appraisal
rights must satisfy all of the conditions set forth in Section 1930 of the PABCL
and in Subchapter D, which  conditions  include the  following  requirements.  A
written  notice of intention to demand "fair value" for shares of Ketchum  Stock
must be delivered to the  Secretary of Ketchum  before the taking of the vote on
the Merger  Agreement.  This written  demand must be in addition to and separate
from any proxy or vote abstaining from or against the Merger Agreement.  Neither
voting  against,  abstaining  from  voting,  nor  failing  to vote on the Merger
Agreement will  constitute a notice of intention to demand fair value within the
meaning of Subchapter D. Any Ketchum  Shareholder  seeking appraisal rights must
hold the shares of Ketchum  Stock for which  appraisal  is sought on the date of
the making of the demand,  continuously  hold such shares  through the Effective
Time, and otherwise comply with the provisions of Subchapter D.

     Ketchum  Shareholders  electing to exercise  their  appraisal  rights under
Subchapter D must not vote for approval and adoption of the Merger Agreement nor
consent  thereto  in  writing.  Voting  in favor  of the  Merger  Agreement,  or
delivering  a proxy in  connection  with the Special  Meeting  (unless the proxy
votes against,  or expressly  abstains from the vote on, the Merger  Agreement),
will constitute a waiver of a Ketchum  Shareholder's right of appraisal and will
nullify any written demand for appraisal submitted by the shareholder.

     The notice of  intention  to demand fair value  should  specify the Ketchum
Shareholder's  name and mailing  address,  the number of shares of Ketchum Stock
owned, and that the Ketchum Shareholder is thereby demanding appraisal of his or
her shares of Ketchum Stock. If the Merger is approved by Ketchum  Shareholders,


                                       25
<PAGE>

Ketchum  shall give  notice to all  Ketchum  Shareholders  who have  delivered a
notice of  intention  to demand  payment  of the fair  value of their  shares of
Ketchum Stock and have  otherwise  complied with  Subchapter D. The notice to be
delivered  by  Ketchum  shall,  among  other  things,  state  where and when the
dissenting Ketchum Shareholder should deliver (a) a demand for payment,  and (b)
the  certificates  representing the dissenting  shareholder's  shares of Ketchum
Stock.

     After the  dissenting  Ketchum  Shareholder  has  received  the notice from
Ketchum described in the preceding  paragraph,  the dissenting  shareholder must
both make written demand for payment and deliver the  certificates  representing
the Ketchum  Shareholders' Ketchum Stock in accordance with the instructions set
forth in the notice.

     Promptly  after  consummation  of the Merger and after timely  receipt of a
proper  demand  of  payment  and  of the  share  certificates  representing  the
dissenting  shareholder's  shares  of  Ketchum  Stock,  Ketchum  shall  remit to
dissenters  the amount that it estimates to be the fair value of the shares,  or
shall give written notice that no remittance  shall be made;  such remittance or
notice shall be accompanied, among other things, by the balance sheet and income
statement of Ketchum and its  subsidiaries  as at December  31, 1995,  [together
with an interim balance sheet and income statement as at _______,  1996.] If the
dissenter  believes  that the amount  stated or  remitted  is less than the fair
value of his shares of Ketchum Stock, he may send to Ketchum his own estimate of
the fair value,  which shall be deemed a demand for payment of the amount or the
deficiency.  If such a demand is not made within 30 days after the remittance or
notice by Ketchum,  the  dissenter  shall be entitled to no more than the amount
stated in the notice or remitted to him by Ketchum.

     Within 60 days after the later of the  Effective  Time,  the receipt of all
demands  for  payment,   or  timely  receipt  of  any  estimates  by  dissenting
shareholders  of the fair value of their  shares,  Ketchum  may file in court an
application for relief requesting a determination by the court of the fair value
of the  shares;  if  Ketchum  does  not  file  an  application,  the  dissenting
shareholder  may file an  application  in  Ketchum's  name,  subject to the time
restrictions set forth in Subchapter D.

     The cost of the  appraisal  proceeding  may be  determined by the court and
assessed   against  the  parties  as  the  court  deems   equitable   under  the
circumstances;  costs would be assessed against dissenting shareholders whom the
court finds to be dilatory, obdurate, arbitrary, vexatious or in bad faith.

     Any Ketchum  Shareholder who has duly demanded appraisal in compliance with
Subchapter  D will not be entitled to vote for any purpose the shares of Ketchum
Stock  subject  to such  demand or to  receive  payment  of  dividends  or other
distributions  on such  shares,  except  for  dividends  or other  distributions
payable to shareholders of record at a date prior to the Effective Time.

     In view  of the  complexity  of  these  provisions  of the  PABCL,  Ketchum
Shareholders  who are  considering  dissenting from the approval and adoption of
the Merger  Agreement  and  exercising  their rights  under  Subchapter D should
consult their legal advisors.

                                       26
<PAGE>

                          THE ESCROW AGREEMENT AND THE
                       KETCHUM SHAREHOLDER REPRESENTATIVE

The Escrow Agreement

     (The  information  contained in this  Registration  Statement of which this
Prospectus/Information Statement performs a part is qualified in its entirety by
reference  to the  complete  text of the Escrow  Agreement  which is filed as an
Exhibit thereto and is incorporated herein by reference.)

     As described above under "The Merger  Agreement and the Merger--the  Merger
Agreement--Indemnification  Obligations",  in order to  satisfy  indemnification
obligations  under the Merger Agreement,  the Ketchum  Shareholders will deposit
shares of Omnicom  Common  Stock into the  General  Escrow  Fund and the Special
Escrow Fund under the Escrow  Agreement.  The General  Escrow Fund will  contain
shares of Omnicom  Common Stock having an aggregate  Market Value of  $4,400,000
and the Special  Escrow Fund will contain  shares of Omnicom Common Stock having
an aggregate Market Value of $2,500,000.

     Each of the Ketchum Common  Shareholders shall be depositing his or her pro
rata share of the General  Escrow Fund or Special Escrow Fund (rounded up to the
nearest whole share) determined by multiplying the aggregate number of shares of
Omnicom  Common  Stock  required  to be  deposited  into such  Escrow  Fund by a
fraction, the numerator of which is the number of shares of Omnicom Common Stock
issuable to such  individual in the Merger and the  denominator  of which is the
total number of shares of Omnicom Common Stock issuable to all such  individuals
required to provide indemnification.

     Based upon the assumed number of  outstanding  shares set forth above under
"Conversion  of the  Ketchum  Common  Stock",  of  the  [$119.85]  Common  Stock
Conversion  Price  payable in respect  of each  share of Ketchum  Common  Stock,
Omnicom  Common  Stock having an  aggregate  Market  Value of [$11.73]  would be
deposited  in the General  Escrow  Fund,  and  Omnicom  Common  Stock  having an
aggregate Market Value of [$6.67] would be deposited in the Special Escrow Fund.
Based upon the assumed  Market Value of $41,  this would result in [0.29] shares
of Omnicom Common Stock per share of Ketchum Common Stock being deposited in the
General  Escrow  Fund,  and [0.16]  shares of Omnicom  Common Stock per share of
Ketchum  Common  Stock being  deposited in the Special  Escrow  Fund.  Since the
amounts  held  in  the  Escrow  Funds  are  subject  to  claims  in  respect  of
liabilities, there can be no assurance that amounts held therein will in fact be
distributed  to the Ketchum  Common  Shareholders.  If none of the amounts  held
therein are in fact  distributed  to the Ketchum Common  Shareholders,  then the
actual Common Stock Conversion  Price will have been only [$101.44],  equivalent
to [2.47] shares of Omnicom Common Stock based on the stated assumptions.

     For purposes of satisfying  any claims,  each share of Omnicom Common Stock
deposited in either Escrow Fund will be valued at the Market  Value,  regardless
of actual fluctuations of the market value of the Omnicom Common Stock after the
Closing of the Merger Agreement.

     Pursuant to the Escrow Agreement,  the Ketchum Shareholder  Representative,
on behalf of the Ketchum Common Shareholders,  shall grant to Omnicom a security
interest in the Escrow Funds to secure the  performance  of the  indemnification
obligations of the Ketchum Common  Shareholders  under the Merger  Agreement and
the performance of their obligations to Omnicom under the Escrow Agreement.

     The Escrow  Agreement  shall  automatically  terminate  if and when all the
shares of  Omnicom  Common  Stock  held in either  Escrow  Fund  shall have been
distributed  by the  Escrow  Agent in  accordance  with the terms of the  Escrow
Agreement.

     General Escrow Fund. The Escrow Agreement provides that, upon determination
that an indemnification  payment is due to Omnicom from the General Escrow Fund,
the Escrow  Agent shall,  to the extent that the shares of Omnicom  Common Stock
then on deposit in the General  Escrow Fund shall be sufficient for the purpose,
deliver to Omnicom the number of shares of Omnicom  Common Stock,  valued at the
original  Market  Value,  equal  to the  indemnification  payment.  The  Ketchum
Shareholder  Representative  shall have the right to  dispute  any such claim by
Omnicom and require  arbitration  of the items in dispute.  

     On the next business day following the earlier of (x) the first independent
audit report,  if any, of Ketchum following the Closing or (y) one year from the
Closing,  the Escrow Agent shall deliver to the Ketchum Common  Shareholders the
remaining  shares of Omnicom  Common Stock then on deposit in the General Escrow
Fund, as reduced by any amounts necessary to cover outstanding claims, including
claims then in dispute.

                                       27
<PAGE>

     All dividends,  interest and other amounts  received with respect to shares
of Omnicom  Common Stock held in the General Escrow Fund shall be income for tax
purposes  to the  Ketchum  Common  Shareholders,  shall be paid  directly to the
Ketchum Common Shareholders, and shall not constitute part of the General Escrow
Fund.

      Special  Escrow  Fund.   The  Escrow   Agreement   provided   that,   upon
determination that an indemnification payment is due to Omnicom from the Special
Escrow Fund,  the Escrow Agent shall  deliver to Omnicom the number of shares of
Omnicom  Common  Stock,  valued  at the  original  Market  Value,  equal  to the
indemnification  payment. The Ketchum Shareholder  Representative shall have the
right to dispute any such claim by Omnicom and require  arbitration of the items
in dispute.

      The parties have agreed that  December 31, 1996 will be the latest date by
which it will be  determined  whether any costs have been incurred in connection
with  the  ongoing  reorganization  of  the  Ketchum  media  buying  operations.
Accordingly,  on the next business day following  December 31, 1996,  the Escrow
Agent shall deliver to the Ketchum Common Shareholders the remaining shares then
on deposit in the Special  Escrow Fund as reduced by any  amounts  necessary  to
cover outstanding claims, including claims then in dispute.

      All dividends,  interest and other amounts received with respect to shares
of Omnicom  Common Stock held in the Special Escrow Fund shall be income for tax
purposes  to the  Ketchum  Common  Shareholders,  shall be paid  directly to the
Ketchum Common  Shareholders and shall not constitute part of the Special Escrow
Fund.

Appointment of the Ketchum Shareholder Representative

     It is a condition to Closing  under the Merger  Agreement  that the Ketchum
Shareholders  appoint the  Ketchum  Shareholder  Representative  to act as their
collective agent in connection with the Escrow Agreement,  including one or more
alternative individuals to act as the Ketchum Shareholder  Representative in the
event that the designated Representative shall have died, resigned, or otherwise
become incapable or unwilling to act as Representative.

     Appointment  of the Ketchum  Shareholder  Representative  shall include the
specific  authorization  for such  Representative to (i) execute and deliver the
Escrow Agreement at the Effective Time of the Merger and any documents  incident
or   ancillary   thereto,   including   without   limitation   any   amendments,
cancellations,  extensions  or waivers in respect  thereof;  (ii) respond to and
make  determinations  in  respect  of the  assertion  of any and all  claims for
indemnification by Omnicom, and to assert claims on behalf of the Ketchum Common
Shareholders, pursuant to the terms of the Escrow Agreement and the terms of the
Merger Agreement pertaining thereto;  (iii) execute and deliver any stock powers
which may be required to be executed by any Ketchum Common Shareholder, in order
to permit the  delivery to Omnicom of any shares of Omnicom  Common  Stock to be
delivered to it pursuant to the Escrow  Agreement;  and (iv) take all such other
actions as may be necessary or  desirable to carry out his  responsibilities  as
collective agent of the Ketchum Shareholders in respect of the Escrow Agreement.

     Finally,  the appointment of the Ketchum Shareholder  Representative  shall
also  include the consent of the Ketchum  Shareholders  to the  procedure  to be
followed in the event the Ketchum Shareholder Representative and any alternative
shall be unable or unwilling to serve or continue to serve as such.  Pursuant to
such a procedure,  a new Ketchum Shareholder  Representative  shall be chosen by
majority  vote of those  persons who were members of Ketchum  Board of Directors
immediately  prior to the  Effective  Time of the  Merger,  any of whom shall be
entitled to call a meeting for such a purpose.

     The  proposal  before the Ketchum  Shareholders  is that Paul H. Alvarez be
appointed as Ketchum Shareholder  Representative,  with Edward L. Graf appointed
as alternate.  Messrs.  Alvarez and Graf are directors and executive officers of
Ketchum and Ketchum  Shareholders.  See "The Merger  Agreement and the Merger --
Interests  of  Ketchum's  Management  in the Merger" and  "Business  Information
Concerning Ketchum -- Executive Officers and Directors,  Principal Shareholders"
for more detailed descriptions of these interests.

                                       28
<PAGE>

Recommendation of the Ketchum Board of Directors

      The Ketchum  Board of Directors  believes  that the adoption of the Escrow
Agreement is in the best  interests of the Ketchum  Shareholders  and recommends
that the Ketchum  Shareholders vote FOR the approval of the Escrow Agreement and
the  transactions  contemplated  thereby,  and  FOR the  appointment  of Paul H.
Alvarez as Ketchum Shareholder Representative, with Edward L. Graf as alternate.

                                       29
<PAGE>

                     BUSINESS INFORMATION CONCERNING OMNICOM

     (The information  contained in this section is qualified in its entirety by
reference to documents incorporated by reference.)

     Omnicom,  through  its  wholly  and  partially-owned  companies,   operates
advertising  agencies  which  plan,  create,  produce and place  advertising  in
various media such as television,  radio,  newspaper and magazines.  The Omnicom
Group offers its clients  such  additional  services as marketing  consultation,
consumer  market  research,  design and  production of  merchandising  and sales
promotion   programs  and   materials,   direct  mail   advertising,   corporate
identification, and public relations. The Omnicom Group offers these services to
clients worldwide on a local, national, pan-regional or global basis. Operations
cover the major  regions  of North  America,  the  United  Kingdom,  Continental
Europe, the Middle East, Africa, Latin America,  the Far East and Australia.  In
1995 and 1994, 53% and 51%,  respectively,  of Omnicom's  billings came from its
non-U.S. operations.

     According to the  unaudited  industry-wide  figures  published in the trade
journal,  Advertising  Age,  in 1995  Omnicom  was  ranked as the third  largest
advertising agency group worldwide.

     The Omnicom Group operates as three separate,  independent agency networks:
the BBDO  Worldwide  Network,  the DDB  Needham  Worldwide  Network and the TBWA
International  Network.  The Omnicom Group also operates  Goodby,  Silverstein &
Partners as an independent  agency,  and certain marketing service and specialty
advertising companies through Omnicom's Diversified Agency Services division.

     BBDO Worldwide, DDB Needham Worldwide and TBWA International, by themselves
and through their respective subsidiaries and affiliates,  independently operate
advertising  agency  networks  worldwide.  Their  primary  business is to create
marketing  communications for their clients' goods and services across the total
spectrum of advertising and promotion media. Each of the agency networks has its
own clients and competes with each other in the same markets.

     The BBDO Worldwide,  DDB Needham Worldwide and TBWA International  agencies
typically  assign to each client a group of  advertising  specialists  which may
include account  managers,  copywriters,  art directors and research,  media and
production personnel.  The account manager works with the client to establish an
overall advertising strategy for the client based on an analysis of the client's
products or services and its market. The group then creates and arranges for the
production of the  advertising  and/or  promotion and purchases  time,  space or
access in the relevant media in accordance with the client's budget.


                                       30
<PAGE>

                       SELECTED FINANCIAL DATA OF OMNICOM

     The following table summarizes certain selected consolidated financial data
of Omnicom and its  subsidiaries  and is  qualified  in its entirety by the more
detailed financial  information and notes thereto incorporated by reference into
this  Prospectus/Information  Statement.  This  information has been adjusted to
reflect the two-for-one stock split in the form of a 100% stock dividend payable
to holders of Omnicom Common Stock on December 15, 1995.

<TABLE>
<CAPTION>

                                                   (Dollars in Thousands Except Per Share Amounts)
                                       -----------------------------------------------------------------------
                                          1995           1994           1993           1992           1991
                                       -----------    -----------    -----------    -----------    -----------
<S>                                     <C>            <C>            <C>            <C>            <C>       
For the year:
  Commissions and fees ...........      $2,257,536     $1,907,795     $1,688,960     $1,600,326     $1,435,977
  Income before change in
     accounting principles .......         139,955        111,495         65,568         59,650         48,457
  Net income .....................         139,955         83,486         65,568         62,850         48,457
  Earnings per common share
    before change in accounting
    principles:
     Primary .....................            1.89           1.58           1.03           1.01           0.84
     Fully diluted ...............            1.85           1.54           1.01           0.86           0.84
  Cumulative effect of change in
    accounting principles:
     Primary .....................             --           (0.40)           --            0.05            --
     Fully diluted ...............             --           (0.40)           --            0.05            --
  Earnings per common share
    after change in accounting
    principles:
     Primary .....................            1.89           1.18           1.03           1.06           0.84
     Fully diluted ...............            1.85           1.18           1.01           0.90           0.84
Dividends declared per common
    share ........................            0.66           0.62           0.62           0.60           0.55
At year end:
  Total assets ...................       3,555,961      3,040,211      2,465,408      2,266,733      2,196,969
  Long-term obligations:
    Long-term debt ...............         289,891        199,487        301,044        324,133        335,220
    Deferred compensation and
      other liabilities ..........         122,623        150,291        113,197        113,359         93,493
</TABLE>

                                       31
<PAGE>

                     BUSINESS INFORMATION CONCERNING KETCHUM

                             Description of Business
General

      Ketchum,  through  its  subsidiaries,  is a  full  service  communications
company. Ketchum is the successor corporation of KM&G International Inc., which,
in turn,  was the  successor  corporation  to Ketchum  McLeod & Grove,  Inc.,  a
Pennsylvania corporation incorporated in 1923.

      Ketchum operates as a holding company and owns directly or indirectly four
subsidiary  companies,  Ketchum  Communications,  Inc.,  Ketchum  Communications
(Delaware),  Inc., Ketchum International,  Inc. and Ketchum New York Advertising
Holdings,  Inc. Ketchum offers a full range of communications services including
the creation of effective advertising in various media, such as direct response,
yellow pages, newspapers, magazines, outdoor, transit, radio and television, and
in public relations  activities.  More  specifically,  the business conducted by
Ketchum's subsidiaries, affiliates and divisions is as follows:

      Ketchum Communications,  Inc. KCI operates in various locations throughout
the United  States under  various trade names and performs a variety of services
to its clients. It operates through the following divisions and units:

          Advertising Division. Ketchum's Advertising Division is a full service
     agency  which works with major  advertisers  in diverse  fields,  including
     consumer  products  and  services,   business-to-business   marketing,  and
     corporate advertising.

          Public  Relations   Division.   Ketchum's  Public  Relations  Division
     conducts  a broad  range of  communications  activities  for a  variety  of
     organizations.  It provides assistance in promoting,  marketing, publicity,
     investor  relations,   government   relations,   social  involvement,   and
     corporate, community and employee relations.

          Directory  Advertising   Division.   Ketchum's  Directory  Advertising
     Division  specializes  in the design and placement of advertising in Yellow
     Pages directories utilizing an extensive  state-of-the-art computer system.
     Ketchum Directory  Advertising  provides up-to-date consumer and industrial
     information  concerning  the  users  of over  6,000  different  directories
     published annually.

          Public Affairs Division. Ketchum's Public Affairs Division specializes
     in communications surrounding public policy issues.
           
          Health Care Division.  Ketchum's Health Care Division,  Ketchum BRH&M,
     is a full service health care communications agency based in New York City.

          Interactive Media Unit.  Ketchum's  Interactive Media Unit specializes
     in finding new media applications for its clients and the agency.

     Ketchum Communications (Delaware),  Inc. Ketchum Communications (Delaware),
Inc. is a non-operating  company which provides financial services to affiliates
of Ketchum.

     Ketchum International,  Inc. Ketchum  International,  Inc., a non-operating
wholly-owned  subsidiary of Ketchum Communications  (Delaware),  Inc., provides,
through its  subsidiaries,  equity  investments and  affiliates,  an integrated,
worldwide  system of  advertising  and  public  relations  agencies  to meet the
marketing  needs of clients selling  products or services  outside of the United
States,  in  a  national,   multi-national  or  international   arena.   Ketchum
International,  Inc.  is  comprised  of a network  of  fifteen  agencies  in ten
different  countries  and is supported by 49 affiliate  agencies in 34 countries
throughout the world.

     Ketchum New York  Advertising  Holdings,  Inc. Ketchum New York Advertising
Holdings,  Inc. is a non-operating  company which owns an interest in a New York
partnership, Jerry & Ketchum.


                                       32
<PAGE>

Clients

     Ketchum's ten largest clients in 1995 accounted for approximately 41.12% of
income from commissions and fees, with the largest  representing  18.04% and the
tenth largest 1.25%.  For the purposes of the foregoing  percentages,  a foreign
subsidiary  of a  domestic  client  (or vice  versa) is deemed to be a  separate
client where such subsidiary has a right to select, and has selected,  Ketchum's
subsidiary abroad as its advertising  agency as a matter of independent  choice.
The major  clients  of  Ketchum's  subsidiaries  appear in  various  promotional
materials. Foreign subsidiaries and affiliates accounted for approximately 6.71%
of the worldwide total of income from commissions and fees of Ketchum in 1995.

Employees; Offices

     Ketchum is a  privately-owned  company  with over 1,000  employees,  240 of
which work at its Pittsburgh, Pennsylvania headquarters. The principal office of
Ketchum  and one of its  significant  operating  offices  is  located at Six PPG
Place, Pittsburgh,  Pennsylvania,  and contains approximately 77,000 square feet
of floor space.  Ketchum's  subsidiaries and affiliates lease additional  office
space in New York  (New  York),  Los  Angeles  and San  Francisco  (California),
Greenwich  (Connecticut),  Coral Gables (Florida),  Chicago (Illinois),  Atlanta
(Georgia),  Louisville  (Kentucky),  Washington  (D.C.),  Kansas City  (Kansas),
Dallas (Texas), as well as various foreign locations.

            Executive Officers and Directors, Principal Shareholders

     The Ketchum  Profit  Sharing Plan is the sole record  holder of the Ketchum
Preferred  Stock. The following table is furnished with respect to the directors
of Ketchum,  and the directors and executive  officers of Ketchum as a group, in
each case as of [March 5, 1996.] There are no family  relationships  between any
of the  directors  or  executive  officers.  The table  also  shows the name and
address of each person known by Ketchum to be the beneficial  owner of more than
5% of Ketchum Common Stock as of [March 5, 1996.]

<TABLE>
<CAPTION>
                                                                               Shares of
                                                                                Ketchum                                             
                                                                             Common Stock       Percent of
Name and Address                         Position with Ketchum                   Owned            Class
- ----------------                         ---------------------                ------------       --------
<S>                                      <C>                                     <C>               <C>
Edward L. Graf                           Director,                               51,900            13.8%
6933 Church St.                          Vice Chairman,
Pittsburgh, PA  15202                    Chief Financial Officer,
                                         Secretary,
                                         Executive Committee Member

J. Craig Mathiesen                       Director,                               31,400             8.4%
6162 South Ramirez Canyon                President, Ketchum
Malibu, CA  90265                        Advertising/Los Angeles,
                                         Executive Committee Member

Paul H. Alvarez                          Director, Chairman of the               27,400             7.3%
112 Hickory Hill Road                    Board, Chief Executive Officer,
Pittsburgh, PA  15238                    Executive Committee Member

James K. Larkin                          Executive Vice President,               25,000             6.7%
21 Via Barcelona                         Ketchum Advertising U.S.A.
Moraga, CA  95466

Dianne Snedaker                          Director,                               20,000             5.3%
66 Hanken Drive                          President, Ketchum
Kentfield, CA  94904                     Advertising/San Francisco

David R. Drobis                          Director, Vice Chairman,                17,800             4.7%
47 Delafield Island Rd.                  Public Relations, Executive
Darien, CT 06820                         Committee Member

James V. Ficco                           Director, President,                    10,335             2.8%
311 Scarlet Cir.                         Ketchum Advertising/
Wexford, PA  15090                       Pittsburgh
</TABLE>

                                       33
<PAGE>

<TABLE>
<CAPTION>
                                                                               Shares of
                                                                                Ketchum       
                                                                             Common Stock        Percent of
Name and Address                         Position with Ketchum                   Owned              Class
- ----------------                         ---------------------                ------------        --------
<S>                                      <C>                                     <C>                <C> 
Raymond L. Kotcher                       Director, President, Public             12,400             3.3%
335 West Pine Street                     Relations
Long Beach, NY  11561

Lawrence R. Werner                       Director, Executive Vice                 8,800             2.3%
Gateway Tower Apartments                 President, Public Relations/
Pittsburgh, PA  15222                    Pittsburgh

Lorraine Thelian                         Director, Executive Vice                 6,664             1.8%
9516 Neuse Way                           President, Public Relations/
Great Falls, VA  22066                   Washington, D.C.

Robert C. Feldman                        Director, Executive Vice                 3,750             1.0%
465 West End Avenue                      President, Public Relations
New York, NY  10024

John C. Joseph                           Director, President,                     3,700             1.0%
825 Lyndhurst Court                      Ketchum Directory Advertising
Naperville, IL  60563

Executive Officers and
Directors as a Group (14 persons)                                               203,458           54.26%
</TABLE>

     Ketchum pays, on an annual basis,  a director's  fee of $25,000 in the form
of cash  which is applied to a purchase  of Ketchum  Common  Stock.  This fee is
paid, and the stock purchase is made, on a quarterly basis.  This director's fee
will be discontinued after the Effective Time of the Merger.

                                       34
<PAGE>

                       SELECTED FINANCIAL DATA OF KETCHUM

     The following table summarizes  certain selected  financial data of Ketchum
and is qualified in its entirety by the more detailed financial  information and
notes thereto appearing elsewhere in this Prospectus/Information  Statement. The
financial data as of and for each of the five years in the period ended December
31, 1995 is derived from the audited financial statements. The financial data as
of  December  31,  1995 and 1994 and for each of the three  years in the  period
ended December 31, 1995 is derived from the financial statements included herein
audited by Deloitte & Touche LLP, independent public accountants. See "Financial
Statements of Ketchum",  the related notes thereto and "Management's  Discussion
and Analysis of Financial Condition and Results of Operations of Ketchum".

<TABLE>
<CAPTION>
                                           1995           1994            1993           1992           1991
                                          -------        -------         -------        -------        -------
                                                     (Dollars in Thousands Except Per Share Amounts)
<S>                                       <C>          <C>              <C>            <C>            <C>     
Statement of Operations Data:
  For the year ended December 31:
    Commissions and fees ...............  $127,388     $124,061         $129,510       $119,819       $116,476
    Income (loss) from continuing                                     
        operations (1) .................    (7,540)       2,092           (5,535)         2,795          2,316
    Net income (loss) (2) ..............    (7,540)       2,092           (5,535)         2,795          1,540
                                                                      
    Income (loss) from continuing                                     
       operations per                                                 
       common share .....................   (21.82)        3.67           (10.55)          4.22           3.22
    Net income (loss) per common                                      
       share ............................   (21.82)        3.67           (10.55)          4.22           2.14
    Dividends declared per                                            
       common share .....................     1.00         1.00             1.00           1.00           1.00
                                                                      
Balance Sheet Data:                                                   
  At December 31:                                                     
    Total assets ........................  127,622      124,766          123,929        137,378        127,503
    Long-term debt (3) ..................    3,804       15,640           14,653         14,906         14,530
    Redeemable Preferred Stock ..........    8,035        4,991            2,471            --             --
</TABLE>
                                                                    
- ------------

(1)  1993 results of operations include the impact of restructuring charges. See
     audited financial statements for further information.

(2)  1991 net income includes loss from discontinued operations.

(3)  Excluding $11,571 of debt classified as current due to covenant  violations
     at December 31, 1995.

                                       35
<PAGE>

                     MANAGEMENT'S DISCUSSION AND ANALYSIS OF
            FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF KETCHUM

                              Results of Operations

Performance in 1995 compared to 1994

     Commission  and fee income for 1995 increased to $127.4 from $124.1 million
in 1994. The increase was primarily  attributable  to a significant  increase in
income  from the  Public  Relations  Division  which was  partially  offset by a
decrease in the income  from the  Advertising  Division,  due  primarily  to the
impact of closing certain offices in 1994 and 1995.

     Operating loss was $6.9 million in 1995 compared with  operating  income of
$6.6  million  in 1994.  The $13.5  million  change  consists  of $16.8  million
increase  in total  operating  expense  partially  offset  by the  $3.3  million
increase in revenue.  With respect to the increase in operating  expenses,  $7.5
million results from increases in compensation and employee benefits and general
agency expense which are discussed below. Further, $9.3 million results from the
increase in other  expense and includes a charge of  approximately  $5.0 million
related to settled and pending litigation matters, the most significant of which
was an  approximate  $4.0 million charge for a judgment,  including  legal fees,
against  Ketchum  related to a prior  acquisition in the United  Kingdom.  Other
operating  expense in 1995 also included charges of  approximately  $2.8 million
related  to the  impairment  of the  excess of cost  over the fair  value of net
assets,  $1.1  million for the  write-off  of notes  receivable  from two equity
investments and $.4 million of increased losses related to investments in equity
investees.

     Partially  offsetting the factors negatively  impacting  operations in 1995
was decreased interest expense and an increase in other income. Interest expense
in  1994  included  a $.4  million  charge  related  to the  refinancing  of the
Company's  primary  debt  instrument.  The  increase in other  income in 1995 is
primarily due to a $.4 million dollar gain on the sale of the Chicago office.

     The Company's  net loss in 1995 was $7.5 million  compared to net income of
$2.1  million  in 1994.  The income tax  benefit  in 1995 of  approximately  $.2
million was less than that  calculated  using the U.S.  federal  statutory rate.
Ketchum's effective income tax rate was negatively  impacted  principally by the
effects of certain  nondeductible  expenses and an increased valuation allowance
for deferred tax assets.

     The  discussion of results of operations of the operating  divisions  which
follows excludes the impact of other operating expense discussed above.

     Commission and fee income for the  Advertising  Division were $58.1 million
in  1995  compared  to  $61.4  million  in 1994  and  operating  income  for the
corresponding  periods was $1.0  million  and $5.4  million,  respectively.  The
decrease in commissions and fees was attributable to the loss of two clients, as
well as lost  commissions  and fees as a result of the closing of offices in New
York and  Philadelphia  in 1994,  and offices in Chicago and  Singapore in 1995.
Operating income in 1995 was negatively impacted by the loss of the two clients,
which resulted in employee severance costs, increased business development costs
and a self promotion project.  The loss of one of the two clients is expected to
have a more  significant  adverse impact on commissions and fees in 1996 as this
business was lost in the last quarter of 1995; however a less significant impact
is expected on operating  income as related  costs have also been  reduced.  The
increases  in business  development  costs and the self  promotion  project were
aimed at generating new business and creating  general market  awareness for the
Advertising  Division  in  the  very  competitive  advertising  industry.  Costs
associated  with closing the  Singapore  office also further  reduced  operating
income.  Operating income in 1995 was favorably  impacted by savings  associated
with the closings of the New York,  Philadelphia  and Chicago  offices which had
previously incurred operating losses.

     Commission and fee income for the Public  Relations  Division  increased to
$52.8 million in 1995 from $45.0 million in 1994 while operating  income for the
corresponding periods increased to $3.1 million from $2.9 million, respectively.
The  increase  in  commissions  and fees was due to new  clients  and  increased
business from existing  clients.  The operating profit  percentage  decreased to
5.9% in 1995 from 6.4% in 1994.  Operating  income was  negatively  impacted  by
increased  legal  costs   associated  with  a  lawsuit  related  to  a  previous
acquisition in the United  Kingdom,  the results of which is discussed  above in
other operating expense.

                                       36
<PAGE>

     The other  divisions  (primarily  Directory  Advertising  and Health  Care)
commissions  and fees were $16.5  million in 1995  compared to $17.7  million in
1994 and operating  losses were $1.4 million in both 1995 and 1994. The decrease
in  commissions  and fees was  attributable  to a decrease  in the  Health  Care
Division and closing of Ketchum Sales Promotions during 1995.  Reduced operating
losses in the Health Care  Division were offset by increased  losses  associated
with increased  activity of the Interactive  Media Unit which was formed in 1994
for the purpose of serving existing and new clients in the emerging  interactive
technology market,  primarily  associated with the Internet.  The improvement in
the Health  Care  Division  in 1995  reflected  a  recovery  from very poor 1994
results.  The 1994 results were adversely  impacted by an industry wide trend of
reduced  advertising  expenditures  by  pharmaceutical  companies as a result of
public scrutiny of these companies'  spending practices.  Directory  Advertising
operating income was comparable in 1995 and 1994.

Performance in 1994 compared to 1993

     Commission  and fee income for 1994 decreased to $124.1 million from $129.5
million in 1993. The decrease was primarily  attributable  to the impact of lost
commissions and fees due to restructuring  which occurred in the last quarter of
1993 and  involved  the closing of certain  offices  during  1994.  Decreases in
commissions  and fees in the other  divisions,  also  contributed to the overall
decrease.  Partially  offsetting  these  decreases was an increase in the Public
Relations Division's commissions and fees.

     Operating  income in 1994 was $6.6 million compared to an operating loss of
$5.1 million in 1993.  The $11.7 million  change is comprised of a $17.1 million
decrease  in total  operating  expenses  partially  offset  by the $5.4  million
decrease in revenues.  With respect to the decrease in operating expenses,  $6.6
million of the  decrease  represents  decreases  in  compensation  and  employee
benefits  and  general  agency  expense  related  to the  closure  of offices as
discussed  below.  Results of operations in 1993 were  negatively  impacted by a
charge of $8.8 million related to  restructuring,  which included plans to close
offices  in  Philadelphia  and  New  York.  In  1993,  operating  expenses  were
negatively  impacted  by $2.0  million,  which  included a charge of $.9 million
related to the  write-off  of a note  receivable  from an equity  investee,  $.7
million  for the  write  down of an  investment  in an equity  investee  and $.3
million for the write-off of impaired  excess of cost over the fair value of net
assets acquired.  Operating  expenses in 1994 included $.3 million for losses of
equity affiliates. Improved results of the Public Relations Division and reduced
losses of the offices  which were  closed in the  restructuring  contributed  to
improved results of operations in 1994.

     Net  income  in 1994  was  $2.1  million  compared  with a net loss of $5.5
million in 1993. Partially offsetting the factors affecting operating income was
an  increased  effective  tax rate due to the  impact  of  settlements  with the
Internal  Revenue  Service for previous tax years which  adversely  affected net
income in 1994.

     The  discussion of results of operations of the operating  divisions  which
follows excludes the impact of other operating expense and restructuring charges
which were discussed above.

     Commissions  and fees for the  Advertising  Division  were $61.4 million in
1994 compared with $65.4 million in 1993. Operating income for the corresponding
periods  was $5.4  million  and $2.6  million,  respectively.  The  decrease  in
commissions and fees was  attributable  to lost  commissions and fees associated
with closing the  Philadelphia  and New York offices.  This impact was partially
offset by an increase in commissions and fees  attributable to expanded business
in the  Advertising  Division's  production  units which allowed the division to
better serve existing  clients and to capture revenues that had gone outside the
agency.  This expansion included new technology which allowed the division to do
typesetting  internally.  Operating  income  increased  primarily due to reduced
losses related to offices which were closed.

     Commissions and fees of the Public  Relations  Division  increased to $45.0
million in 1994 from $41.9 million in 1993 while operating  income  increased to
$2.9  million  from $2.7  million.  The  increase  in  commissions  and fees was
primarily  due to strong  demand for  services in the United  States,  both from
existing clients and new clients.  Commissions and fees related to an additional
investment in an agency in France also contributed to the increase. The increase
in  operating  income  was a  result  of the  factors  that  contributed  to the
commissions and fees increase. The operating profit percentage was approximately
6.4% for both 1994 and 1993.

                                       37
<PAGE>

     Commissions  and fees for the other  divisions  were $17.7  million in 1994
compared to $22.2 million in 1993.  Operating  loss was $1.4 million in 1994 and
operating  income was $.4 million in 1993. The decrease in commissions  and fees
was due to the  impact  of lost  commissions  and  fees  in both  the  Directory
Advertising and Health Care Divisions. The decrease in Directory Advertising was
primarily  related to the loss of a  significant  client.  The  decrease  in the
Health Care  Division was due to an industry  wide trend of reduced  advertising
expenditures by pharmaceutical companies as a result of public scrutiny of these
companies' spending practices.  Operating income was negatively impacted by lost
revenues and costs  associated  with a severe  decline in business in the Health
Care Division. Directory Advertising operating income was comparable in 1994 and
1993.

Impact of Inflation

      Ketchum's  financial  statements  are prepared on a historical  cost basis
which does not  completely  account for the effects of inflation.  The impact of
inflation on the Ketchum's  results was not  significant in 1995,  1994 and 1993
due to the low inflation rates in those years.


Accounting Standard

     In March 1995, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards ("SFAS") No.121 "Accounting for the Impairment of
Long-Lived  Assets and  Long-Lived  Assets to Be Disposed  Of". This standard is
effective for years beginning after December 15, 1995. The general  requirements
of SFAS  No.121  apply  to  non-current  assets  and  require  impairment  to be
considered  whenever evidence suggests that future cash flows will not result in
an amount at least  equal to the  carrying  value of the asset.  Ketchum has not
adopted  SFAS No. 121 at  December  31,  1995.  Management  of Ketchum  does not
believe the adoption of this standard  will have a material  effect on financial
condition or results of operations.

                         Capital Resources and Liquidity

     Cash and cash  equivalents  increased  to $2.9 million from $2.5 million in
1994.  Ketchum's  primary source of cash and cash  equivalents has  historically
been from operations.  Cash flow from operations was $8.1 million,  $6.0 million
and $7.8 million in 1995, 1994 and 1993, respectively. Cash and cash equivalents
have been utilized to fund investing activities,  primarily capital expenditures
and additional  investments in affiliates  and  acquisitions.  Cash flow used in
investing  activities  totaled  $3.5  million,  $7.4 million and $6.3 million in
1995,  1994 and 1993,  respectively.  Ketchum also had available $7.0 million of
capacity,  net of a $1 million  reserve  against  guarantees,  on its  revolving
credit  agreement  at December  31,  1995.  However,  as a result of  additional
borrowings  subsequent to December 31, 1995 Ketchum had approximately $80,000 of
additional  borrowings  available  as of  March  6,  1996.  Ketchum  is  also in
violation of certain covenants of this revolving credit agreement as of March 6,
1996. At December 31, 1995,  Ketchum was also in violation of certain  covenants
pertaining  to  its  senior  notes  payable.  As  a  result  of  these  covenant
violations,  the  holder of the notes may call the debt and  declare  the entire
amount of the indebtedness and a penalty, due and payable immediately. The total
amount  outstanding on the notes is  approximately  $11.6 million and management
estimates  the  penalty,  if the note would be called,  would  approximate  $1.5
million.  Ketchum is also  required to currently  pay $4.0 million  related to a
judgment for a prior acquisition in the United Kingdom. These factors contribute
to a working capital deficiency at December 31, 1995.

     Cash and cash  equivalents  have been generated by Ketchum from the sale of
common stock to employees including payments received on related notes.  Ketchum
also has agreements to repurchase Ketchum Common Stock and has utilized cash and
cash equivalents to repurchase shares and to pay related notes. In 1994 and 1993
Ketchum issued 20,000 shares of Ketchum  Preferred Stock to generate  additional
cash and cash  equivalents.  The  Ketchum  Preferred  Stock is held  only by the
Profit  Sharing  Plan.  Ketchum has paid cash  dividends on common and preferred
shares of approximately $.6 million in each of 1995, 1994 and 1993.

     Management  of Ketchum  believes  that  sufficient  taxable  income will be
generated in 1996 to realize the net deferred tax asset recorded at December 31,
1995.

     Ketchum  anticipates  that both current  liquidity and long-term  financial
resource  issues  will be  addressed  through  institutional  lending and merger
arrangements.

                                       38
<PAGE>

                      DESCRIPTION OF OMNICOM CAPITAL STOCK

      Each share of Omnicom Common Stock entitles the holder thereof to one vote
on all matters submitted to a vote of shareholders. All shares of Omnicom Common
Stock have equal rights and are entitled to such dividends as may be declared by
the Omnicom Board of Directors out of funds  legally  available  therefor and to
share  ratably upon  liquidation  in the assets  available for  distribution  to
stockholders.  Omnicom is not aware of any restrictions on its present or future
ability  to  pay  dividends.  However,  in  connection  with  certain  borrowing
facilities  entered into by Omnicom and its subsidiaries,  Omnicom is subject to
certain restrictions on current ratio, ratio of total consolidated  indebtedness
to total  consolidated  capitalization,  ratio of net cash flow to  consolidated
indebtedness,  and  limitation of  investments  in and loans to  affiliates  and
unconsolidated subsidiaries.  The Omnicom Common Stock is not subject to call or
assessment,  has no preemptive conversion or cumulative voting rights and is not
subject  to  redemption.  Omnicom's  shareholders  elect a  classified  board of
directors,  and may not remove a director  except by an  affirmative  two-thirds
vote of all outstanding shares. A two-thirds vote is also required for Omnicom's
shareholders  to amend  Omnicom's  by-laws or certain  provisions of its charter
documents, and to change the number of directors comprising the full board.

     Omnicom may issue  preferred  stock in series  having  whatever  rights and
preferences the Omnicom Board of Directors may determine.  One or more series of
preferred  stock may be made  convertible  into  Omnicom  Common  Stock at rates
determined by the Board of Directors,  and preferred stock may be given priority
over the Omnicom  Common Stock in payment of dividends,  rights on  liquidation,
voting and other  rights.  Preferred  stock may be issued from time to time upon
authorization  of  the  Omnicom  Board  of  Directors   without  action  of  the
shareholders, Omnicom has no current plans to issue any preferred stock.

     Omnicom  currently  has  outstanding  $143,750,000  of  4.5%/6.25%  Step-Up
Convertible Subordinated Debentures with a scheduled maturity in 2000, which are
convertible into Omnicom Common Stock at a conversion  price of $27.44,  subject
to adjustment in certain events.

     Chemical Mellon Shareholder  Services,  450 West 33rd Street, New York, New
York 10001 is the transfer agent and the registrar of the Omnicom Common Stock.

                      DESCRIPTION OF KETCHUM CAPITAL STOCK

     Ketchum is a  privately-owned  company and there is no  established  public
trading market for its capital stock.  Ketchum's authorized capital is 2,000,000
shares of common  stock,  stated value of $0.005 per share and 50,000  shares of
preferred  stock,  par value $100 per share.  As of [March 5, 1996,]  there were
[374,967]  shares of Ketchum Common Stock issued and  outstanding  and [989,033]
shares of Ketchum  Common Stock held in  treasury;  and 6,282 shares of Series A
Preferred Stock issued and outstanding and no shares of Series A Preferred Stock
held in treasury.

     Under provisions of the Ketchum Articles,  only (a) employees of Ketchum or
an entity owned by Ketchum, or in which Ketchum, directly or indirectly,  has an
interest, (b) non-employees approved by the Ketchum Executive Committee, and (c)
a trust(s)  established as a part of a qualified  retirement  plan maintained by
Ketchum,  are entitled to become  shareholders  of Ketchum.  No more than 10% of
Ketchum's issued and outstanding capital stock can be owned by non-employees and
employees of entities which are less than 100% owned by Ketchum or a corporation
owned directly or indirectly by Ketchum.

     Shares of stock held by  employees  of Ketchum  are subject to the terms of
shareholder agreements, which restrict the sale, transfer, pledge, hypothecation
or  other  disposition  of  shares.  Pursuant  to  the  shareholder  agreements,
transfers of shares are prohibited  except to Ketchum or to other employees upon
Ketchum's approval.  An employee, or his estate, is obligated to sell his shares
to Ketchum upon termination of employment, death or bankruptcy. Those shares are
repurchased by Ketchum at a price to be determined in accordance  with the terms
of the shareholder  agreement.  This  determination is based primarily upon book
value, as adjusted by the Ketchum Board of Directors.

Common Stock

     All  outstanding  shares  of  Ketchum  Common  Stock  are  fully  paid  and
nonassessable.  The holders of Ketchum Common Stock are entitled to one vote for
each share held of record and on all matters voted by the Ketchum  Shareholders.
There are no cumulative voting rights for the election of directors.

                                       39
<PAGE>

     There are no redemption, sinking fund, conversion or preemptive rights with
respect to shares of Ketchum  Common Stock.  All shares of Ketchum  Common Stock
have equal rights and  preferences.  In the event of the liquidation of Ketchum,
each  outstanding  share is  entitled  to  participate  pro  rata in the  assets
remaining  after payment of, or adequate  provision  for, all known  preferences
(including the Ketchum Preferred Stock), debts and liabilities of Ketchum.

     Dividends  are payable  only when and if declared by the Board of Directors
of Ketchum out of funds legally available therefor and are necessarily dependent
upon  earnings,  the general  financial  status of the company and various other
factors.  A small cash dividend was historically paid with respect to the shares
of Ketchum  Common  Stock so as to  preserve  corporate  funds for growth and to
increase the potential for long-term capital gain treatment. The regular Ketchum
Common Stock  dividend has been paid in four equal  quarterly  installments.  In
1994 and 1995,  a $1.00  dividend  was paid with  respect to the Ketchum  Common
Stock. A special Ketchum Common Stock dividend is paid only if actual  financial
performance is substantially above projected performance,  and only if Ketchum's
capital  requirements  do not require  retention of the cash. No special Ketchum
Common Stock dividend has been declared in the past five years.

Preferred Stock

     Ketchum has designated 20,000 shares of Series A Preferred Stock, par value
$100 per share, as a series of its authorized  preferred stock; this is the only
preferred stock  outstanding and is referred to in this document as the "Ketchum
Preferred  Stock".  The  Ketchum  Preferred  Stock has a  dividend,  if and when
declared by the Ketchum Board of Directors,  of $90 per annum per share, payable
in quarterly payments of $22.50 on March 15, June 15, September 15, and December
15 of each year. Such dividends are senior to dividends on Ketchum Common Stock,
and are cumulative  and accrue on a day-to-day  basis whether or not earned from
and after the date of  issuance or the date to which  dividends  have been paid.
Accrued but unpaid  dividends do not bear interest.  The quarterly  dividends on
the Ketchum  Preferred Stock as described above were paid by Ketchum as required
for each quarter of 1994 and 1995.

     Late dividends (those paid on the 30th or following date after the dividend
payment  date)  accrue  at the rate of $100 per  annum  for a period  of 90 days
following such dividend payment date, and $90 per annum thereafter.  The Ketchum
Preferred Stock has a liquidation  preference over the holders of Ketchum Common
Stock of $1,000,  plus all  accrued but unpaid  dividends,  per share of Ketchum
Preferred Stock. Except for such liquidation preference,  the holders of Ketchum
Preferred  Stock  are not  entitled  to any  distribution  in the  event  of the
liquidation,  dissolution or winding up of Ketchum. If the assets of Ketchum are
not  sufficient  to pay such  liquidation  preference,  the  holders  of Ketchum
Preferred  Stock share ratably in any such  distribution  in accordance with the
amount  that would have been paid if such  liquidation  preference  were paid in
full. After the liquidation preference is paid in full, all remaining assets are
to be distributed to the holders of the Ketchum Common Stock.

     Ketchum may redeem the Ketchum Preferred Stock at any time after January 1,
2003 at the option of the Ketchum Board of Directors,  in whole or in part, at a
redemption price of $1,045 per share of Ketchum Preferred Stock plus accrued and
unpaid dividends to the redemption date.

     Each  share of  Ketchum  Preferred  Stock has one vote,  which  shall  vote
together with the Ketchum  Common Stock on all matters  submitted to the Ketchum
Shareholders,  except for  matters,  such as the  Merger,  as to which the PABCL
provides for a special class vote.

                        COMPARISON OF SHAREHOLDER RIGHTS

     Upon   consummation  of  the  Merger,   the  shareholders  of  Ketchum,   a
Pennsylvania  corporation,  will  become  shareholders  of  Omnicom,  a New York
corporation,  and their rights as such will be governed by New York law, as well
as the Omnicom  Certificate of  Incorporation  (the "Omnicom  Certificate")  and
By-laws (the "Omnicom  By-laws") as amended from time to time in accordance with
New York law. While it is not practical to describe all changes in the rights of
Ketchum  Shareholders  that will result from the  application of New York law in
lieu of Pennsylvania law and the differences between the Omnicom Certificate and
the Omnicom  By-laws  and the Ketchum  Articles  and the  Ketchum  By-laws  (the
"Ketchum By-Laws"), the following is a summary of material differences.

                                       40
<PAGE>

     References  to the "NYBCL" are to the New York  Business  Corporation  Law,
while  references to the "PABCL" are to the  Pennsylvania  Business  Corporation
Law.

Special Meetings of Shareholders

     The PABCL provides that a special meeting of the shareholders may be called
at any time by the board of directors, by such other officers and persons as may
be provided in the by-laws of the  corporation,  or by shareholders  entitled to
cast at least 20% of the votes which all  shareholders  are  entitled to cast at
such  a  meeting.  The  Ketchum  By-laws  provide  that  a  special  meeting  of
shareholders  may be  called  at any  time by the  Chairman  of the  Board,  the
President, any Vice Chairman of the Board, the Secretary, the Board of Directors
or the holders of not less than ten percent of all  outstanding  shares entitled
to vote at the special meeting.  Under the Ketchum By-laws,  if the Secretary of
Ketchum  fails to schedule a special  meeting of the  shareholders  after such a
meeting had been requested by a person or persons  entitled to do so, the person
or persons making the request for a special meeting may schedule the meeting.

     Under New York law, a special meeting of shareholders  may be called by the
board of directors  and by such person or persons as may be  authorized to do so
in the  certificate  of  incorporation  or by-laws.  In  addition,  if an annual
shareholder  meeting  has not  been  held  for a  certain  period  of time and a
sufficient  number of directors  were not elected to conduct the business of the
corporation,  the  board  shall  call a  special  meeting  for the  election  of
directors.  If the board fails to do so, or sufficient directors are not elected
within a certain  period,  holders of 10% of the shares  entitled  to vote in an
election  of  directors  may call a special  meeting for such an  election.  The
Omnicom By-laws  provide that a special  meeting of shareholders  may be called,
for any purpose or purposes,  by the Board of Directors or by the President,  or
by the Secretary upon the request of a majority of the Board of Directors.

Removal of Directors

     Under Pennsylvania law, the entire board of directors, a class of the board
of directors or any individual  director may be removed  without cause by a vote
of the shareholders entitled to vote for the election of directors. Further, the
board of directors  may be removed at any time,  with or without  cause,  on the
unanimous vote or consent of the shareholders. The Ketchum By-laws are otherwise
silent as to the removal of directors.

     Under New York law, (i) shareholders may remove any director for cause, and
the  certificate or provision of a by-law adopted by the  shareholders  may give
the board  such  right;  (ii) if the  certificate  or the  by-laws  so  provide,
shareholders may remove directors without cause; and (iii) an action to remove a
director for cause may be brought by the  attorney-general  or by the holders of
ten percent of the outstanding  shares,  whether or not such Shares are entitled
to vote.  Neither the Omnicom  Certificate  nor the Omnicom  By-Laws  permit the
removal of directors other than for cause.

Vacancies On The Board

     Pennsylvania  law  provides  that  vacancies  on the  board  of  directors,
including  vacancies  resulting from an increase in the number of members of the
board of directors, may be filled by a majority vote of the remaining members of
the board of directors,  even if the remaining  members  constitute  less than a
quorum.  The PABCL also states  that the person  selected to fill the vacancy on
the board of  directors  then  serves the balance of the  unexpired  term on the
board.  The Ketchum  By-laws  provide  that a vacancy on the Board of  Directors
shall be filled by a  majority  vote of the  remaining  directors,  even if they
comprise  less  than a quorum.  Under the  Ketchum  By-laws,  the newly  elected
director then serves until the next annual meeting of the shareholders and until
a  successor  is elected and  qualified  or until the newly  elected  director's
earlier death, resignation or removal.

     Under New York law, newly created directorships  resulting from an increase
in the number of directors and  vacancies  occurring in the board for any reason
except the  removal of  directors  without  cause,  may be filled by vote of the
board.  However,  the certificate of  incorporation  or by-laws may provide that
such newly  created  directorships  or vacancies are to be filled by vote of the
shareholders.  Unless the certificate of incorporation or the specific provision
of a  by-law  adopted  by the  shareholders  provide  that  the  board  may fill
vacancies  occurring in the board by reason of the removal of directors  without
cause, such vacancies may be filled only by vote of the shareholders. A director

                                       41
<PAGE>

elected to fill a vacancy, unless elected by the shareholders,  will hold office
until the next meeting of  shareholders at which the election of directors is in
the regular  order of business and until his or her  successor  has been elected
and qualified. The Omnicom By-laws provide that any vacancy in the Omnicom Board
may  be  filled  by a  majority  vote  of  the  remaining  directors  or by  the
shareholders.

Classification of the Board of Directors

     The Ketchum By-laws do not provide for the  classification  of the Board of
Directors.

     The Omnicom  Certificate  provides that directors are to be classified into
three classes, which are to hold office in staggered three-year terms.

Inspection of the Books and Records

     Under  Pennsylvania  law, a  shareholder  has the right to examine,  during
normal business hours,  the share register,  the books and records of account of
the corporation,  the records of proceedings of the incorporators,  shareholders
and directors,  and to make copies and extracts  therefrom,  if the  shareholder
makes a written,  verified demand to inspect.  The shareholder's  written demand
must  state a purpose  for the  inspection  that is  reasonably  related  to the
shareholder's  status as a  shareholder.  If the  inspection is to be made by an
attorney  or agent of the  shareholder,  the  demand  must be  accompanied  by a
verified power of attorney authorizing the attorney or agent to act on behalf of
the  shareholder.  If the  corporation or an officer or agent of the corporation
has refused to permit the inspection or does not reply to the demand within five
business days after the demand was made, the  shareholder may apply to the court
of common  pleas to  enforce  the right of  inspection,  and the court of common
pleas will determine if the inspection is being made for a proper purpose. Other
than  specifically  enumerating  the  shareholders'  rights  to  receive  annual
financial  statements,  the Ketchum By-laws do not otherwise refer to the rights
of shareholders to inspect the corporate books and records.

     Under New York law, only shareholders of record for at least six months and
any person or the  authorized  agent of any  person or persons  holding at least
five  percent of any class of the  outstanding  shares have the right to examine
the  minutes of a  corporation  and the right to receive  upon  request  certain
financial  statements of the  corporation.  Under the federal  securities  laws,
shareholders  of  Omnicom  receive  financial  information   substantially  more
extensive than that required under New York law.

Amendments of the Articles of Incorporation/Certificate of Incorporation

     Pennsylvania  law states that  amendments to the articles of  incorporation
shall be  proposed by  resolution  of the board of  directors  or by petition of
shareholders  entitled  to cast at least ten  percent of the shares  entitled to
vote.  The board of  directors  must  provide a summary or copy of the  proposed
amendment and information  regarding  dissenters' rights, if applicable,  to the
shareholders.   Except  in  limited   cases,   amendments  to  the  articles  of
incorporation must be approved by a majority of shares entitled to vote and by a
majority  of any  class or  series of  shares  that is  entitled  to vote on the
proposed  amendment as a class or series.  Certain amendments to the articles of
incorporation that would adversely affect a series or class or which would alter
the preferences of a series or class also must be approved by a majority vote of
that  series  or  class.  The  Ketchum  By-laws  do not  otherwise  provide  for
amendments to the Articles of Incorporation.

     Under  New  York  law,  an  amendment  or  change  of  the  certificate  of
incorporation  may be authorized  by vote of the Board,  followed by vote of the
holders  of a majority  of all  outstanding  shares  entitled  to vote  thereon.
Certain  categories  of  amendments  which  adversely  affect  the rights of any
holders of shares of a class or series of stock require the affirmative  vote of
the  holders of a majority  of all  outstanding  shares of such class or series,
voting separately.  The Omnicom Certificate  requires the affirmative vote of 66
2/3% of the voting power of all outstanding shares of voting stock of Omnicom in
order to amend or repeal the provisions of the Omnicom  Certificate  setting the
number of directors  constituting the entire Board of Directors and dividing the
directors into classes, and absolving directors from personal liability pursuant
to Section 719 of the NYBCL.

Amendments to By-Laws

      Pennsylvania law provides that the shareholders have the power to amend or
repeal the by-laws of the corporation. However, the power to amend or repeal the
by-laws  can be  expressly  vested by the  by-laws  in the  board of  directors,
subject to the power of the shareholders to change such action by the board. The
Ketchum By-laws provide that the By-laws may be amended or altered by a majority

                                       42
<PAGE>

vote of the members of the Board of Directors at any regular or special meeting,
subject to the power of the  shareholders  to change such action by the Board of
Directors.

     Under  Pennsylvania  law, the board of  directors  lacks the power to amend
by-laws  relating  to a variety  of  subjects  that can be  amended  only by the
shareholders,  including  provisions  governing  the  powers  of  the  board  of
directors, limiting the personal liability of members of the board of directors,
classification  of the board of directors,  removal of directors and quorums and
certain other matters relating to shareholder meetings.

     Under New York law,  except as  otherwise  provided in the  certificate  of
incorporation,  by-laws  may be  amended,  repealed or adopted by the holders of
shares entitled to vote in the election of any director. When so provided in the
certificate of  incorporation or a by-law adopted by the  shareholders,  by-laws
may also be  amended,  repealed  or  adopted by the board by such vote as may be
therein  specified,  which may be greater than the vote otherwise  prescribed by
law,  but any by-law  adopted by the board may be  amended  or  repealed  by the
shareholders  entitled  to  vote  thereon.   Under  the  terms  of  the  Omnicom
Certificate and Omnicom  By-laws,  Omnicom  By-laws may be amended,  repealed or
adopted  only by the  affirmative  vote of at least 66 2/3% of the total  voting
power of all outstanding shares of voting stock of Omnicom.

Dividends and Distributions

     Under Pennsylvania law and unless the by-laws state otherwise, the board of
directors is empowered to authorize  distributions  to or for the benefit of its
shareholders.  The PABCL  prohibits a distribution  if, after it is made (i) the
corporation  would be unable to pay its debts as they become due in the ordinary
course of business  or (ii) the total  assets of the  corporation  would be less
than the sum of (A) its  total  liabilities  and (B) the  amount  that  would be
needed,  if the  corporation  were to be  dissolved  at the time as of which the
distribution is measured, to satisfy the preferential rights upon dissolution of
the shareholders whose  preferential  rights are superior to those receiving the
distribution.

     Under  New  York  law,   dividends  may  be  declared  or  paid  and  other
distributions  may be made out of  surplus  only,  so that the net assets of the
corporation  remaining after such  declaration,  payment or distribution must at
least equal the amount of its stated  capital.  When any dividend is paid or any
other  distribution  is made from sources other than earned  surplus,  a written
notice must accompany such payment or  distribution  as provided by the NYBCL. A
corporation  may declare and pay  dividends or make other  distributions  except
when currently the  corporation is insolvent or would thereby be made insolvent,
or when the  declaration,  payment  or  distribution  would be  contrary  to any
restrictions contained in the corporation's certificate of incorporation.

State Takeover Legislation

     In certain instances,  Pennsylvania's  takeover  legislation  restricts the
ability of a person or entity to acquire  control of a Pennsylvania  corporation
through  a  business  combination,  such as a  merger,  consolidation  or  share
exchange,  or through the  acquisition  of shares  constituting  at least twenty
percent  of the  votes  that can be cast in the  election  of  directors  of the
corporation.  The  takeover  provisions  of the PABCL  apply,  however,  only to
registered corporations,  which are defined as (i) those corporations which have
registered  securities under the Exchange Act, (ii) those corporations that have
reporting  requirements under the Exchange Act by virtue of a registration filed
under the Securities Act, (iii) certain  corporations  that have registered as a
management  company  under  the  Investment  Company  Act  of  1940  or  (iv)  a
Pennsylvania  corporation  all of whose  shares are owned,  either  directly  or
indirectly, by a domestic or foreign registered corporation. Because Ketchum has
no  reporting  or  registration  requirements,  is not a  registered  management
company  and is not owned,  either  directly  or  indirectly,  by a domestic  or
foreign  registered  corporation,   the  Pennsylvania  takeover  legislation  is
inapplicable to Ketchum.

      The NYBCL prohibits any business combination (defined to include a variety
of transactions,  including  mergers,  consolidations,  sales or dispositions of
assets, issuances of stock,  liquidations,  reclassifications and the receipt of
certain  benefits from the  corporation,  including  loans or guarantees)  with,
involving or proposed by any interested  shareholder  (defined  generally as any
person who, (i)  directly or  indirectly,  beneficially  owns 20% or more of the
outstanding  voting stock of a resident domestic New York corporation or (ii) is
an affiliate or associate of such resident domestic  corporation and at any time

                                       43
<PAGE>

within the past five years was a beneficial  owner of 20% or more of such stock)
for a period of five years  after the date on which the  interested  shareholder
became  such.  After  such  five-year  period a business  combination  between a
resident  domestic  New York  corporation  and such  interested  shareholder  is
prohibited  unless either  certain "fair price"  provisions are complied with or
the business  combination  is approved by a majority of the  outstanding  voting
stock not beneficially owned by such interested shareholder or its affiliates or
associates.  The NYBCL exempts from its  prohibitions  any business  combination
with an interested shareholder if such business combination,  or the purchase of
stock by the interested shareholder that caused such shareholder to become such,
is  approved  by the  board  of  directors  of the  resident  domestic  New York
corporation prior to the date on which the interested shareholder becomes such.

     Under the NYBCL,  corporations  may opt to not be governed by the  statute;
Omnicom has not so elected.

Business Combinations

     Under the PABCL,  the affirmative  vote of the holders of a majority of the
outstanding shares entitled to vote on the matter is required to approve mergers
or consolidations,  and certain sales, leases, exchanges and other distributions
of all or  substantially  all of the  property and assets of a  corporation.  In
addition,  if any class or series of shares is entitled to vote on the merger or
consolidation  as a  class,  a  majority  of the  votes  cast in each  class  is
necessary to approve the merger or consolidation.

     Under the NYBCL,  the affirmative  vote of the holders of two-thirds of all
outstanding  shares of stock of a New York corporation  entitled to vote thereon
is  required  to approve  mergers  and  consolidations,  and for sales,  leases,
exchanges  or other  dispositions  of all or  substantially  all the assets of a
corporation, if not made in the usual or regular course of the business actually
conducted by such corporation.

Rights of Dissenting Shareholders

     Under Pennsylvania law, a shareholder can dissent from, and receive payment
of the  fair  value of his or her  shares  in the  event  of,  certain  mergers,
consolidations,  share  exchanges,  asset  transfers  and  corporate  divisions.
Further,  a  corporation  may, in its by-laws or by  resolution  of the board of
directors,  provide for  dissenters'  rights that are more  expansive than those
granted by the PABCL.  Neither  the Ketchum  By-laws  nor any board  resolutions
provide for any such expanded  dissenters'  rights.  A shareholder who wishes to
dissent  from a  corporate  action and to  receive  the fair value of his or her
shares must (i) make a written demand therefor prior to the shareholder  vote on
the action,  (ii) retain  ownership of the shares  through the effective date of
the proposed  action and (iii) refrain from voting his or her shares in approval
of the action.  The shareholder  then must make a demand for payment and deposit
his or her  share  certificates  with the  corporation  within  the time  period
allotted by the  corporation.  If the shareholder  fails to make a timely demand
for  payment or fails to deposit  stock  certificates  with the  corporation  in
accordance with  instructions by the corporation,  the shareholder  loses his or
her  right to  receive  payment  for the fair  value of his or her  share  under
Pennsylvania law.

     Shareholders of a New York  corporation  have the right to dissent not only
in the  context of a merger or  consolidation,  but also in the event of certain
amendments or changes to the certificate of  incorporation  adversely  affecting
their  shares,  certain  sales,  exchanges  or  other  dispositions  of  all  or
substantially all of the corporation's assets and certain share exchanges.

Indemnification of Directors, Officers and Employees

     Absent contrary provisions in the corporation's  by-laws,  Pennsylvania law
provides that a corporation has the power to, and in some cases must,  indemnify
any person who was or is a party,  or is threatened  to be made a party,  to any
threatened,  pending or completed  action or proceeding,  including a derivative
action,  by  reason  of the fact  that the  person  is,  was or  functions  as a
director,  officer, employee or agent of the corporation.  Such indemnification,
against reasonable expenses,  attorneys' fees, judgments, fines and amounts paid
in settlements,  is permitted only if the person to be indemnified acted in good
faith and in a manner he or she reasonably believed to be in, or not opposed to,
the best interests of the corporation or, in the case of a criminal  proceeding,
if he or she had no  reasonable  cause to believe  that his or her  conduct  was
unlawful.

                                       44
<PAGE>

     A determination that the officer,  director,  employee or agent has met the
required standard of conduct, and that indemnification therefore is proper, must
be made (i) by a majority vote of a quorum comprised of disinterested directors,
(ii) in  writing  by  independent  legal  counsel  if a quorum of  disinterested
directors cannot be achieved or, if a quorum of disinterested  directors exists,
a majority of such quorum votes to seek a written  determination  by independent
legal counsel or (iii) by the shareholders.  In the case of a derivative action,
the PABCL bars  indemnification when the representative has been adjudged liable
unless  and to the extent the court of common  pleas or other  court  determines
that indemnity is proper.

     A  corporation  may  advance  expenses  incurred  by a  director,  officer,
employee  or agent in  defending  an  action  or  proceeding  in the  event  the
director,  officer,  employee  or  agent  has  provided  to the  corporation  an
undertaking to repay the advanced  expenses if it is later determined that he or
she  was not  entitled  to  indemnification.  The  PABCL  also  provides  that a
corporation must indemnify a director,  officer, employee or agent from expenses
incurred  in  defense  of any  action or  proceeding  described  above  when the
director,  officer,  employee  or agent  has been  successful  on the  merits or
otherwise.

     The statutory  indemnification rights are not exclusive and can be expanded
by the  corporation's  by-laws,  by agreement or by vote of the  shareholders or
disinterested   directors.   Such  expanded   indemnification   rights  will  be
unavailable,  however,  if a court of common pleas finds that the act or failure
to act giving rise to the purported right of indemnification constituted willful
misconduct  or  recklessness.  Finally,  unless the  by-laws of the  corporation
provide  otherwise,  a  corporation  may  purchase  insurance  on  behalf of any
officer, director, employee or agent.

     The  Ketchum  By-laws  provide  that  indemnification  shall  be  made to a
director or officer to the fullest  extent  permitted  by law for  expenses  and
other costs incurred in any action, suit or proceeding, whether civil, criminal,
administrative or investigative,  and whether or not such suit was derivative in
nature. In addition, the Ketchum By-laws provide that an officer or director may
be  entitled  to  indemnification  in  connection  with a  proceeding  he or she
initiated  only if such  proceeding  was  authorized  by the  Ketchum  Board  of
Directors.

     Under  Section 722 of the NYBCL,  a  corporation  may  indemnify any person
made, or threatened to be made, a party to any action or proceeding,  except for
shareholder  derivative  suits,  by  reason  of the  fact  that  he or she was a
director or officer of the corporation,  provided such director or officer acted
in good faith for a purpose  which he or she  reasonably  believed  to be in the
best interests of the corporation and, in criminal proceedings, in addition, had
no reasonable  cause to believe his or her conduct was unlawful.  In the case of
shareholder derivative suits, the corporation may indemnify any person by reason
of the fact that he or she was a director or officer of the corporation if he or
she acted in good faith for a purpose which he or she reasonably  believed to be
in the best interests of the corporation,  except that no indemnification may be
made in respect of (i) a threatened action, or a pending action which is settled
or otherwise  disposed  of, or (ii) any claim,  issue or matter as to which such
person has been adjudged to be liable to the corporation, unless and only to the
extent  that the court in which the  action  was  brought,  or, if no action was
brought, any court of competent jurisdiction,  determines upon application that,
in  view of all  the  circumstances  of the  case,  the  person  is  fairly  and
reasonably  entitled to indemnity for such portion of the settlement  amount and
expenses as the court deems proper.

     The  indemnification  described  above under the NYBCL is not  exclusive of
other  indemnification  rights to which a director or officer  may be  entitled,
whether  contained in the  certificate  of  incorporation  or by-laws,  or, when
authorized  by  (i)  such  certificate  of  incorporation  or  by-laws,  (ii)  a
resolution  of  shareholders,  (iii)  a  resolution  of  directors,  or  (iv) an
agreement providing for such  indemnification,  provided that no indemnification
may be made to or on behalf of any  director  or officer if a judgment  or other
final  adjudication  adverse to the director or officer  establishes that his or
her acts were committed in bad faith or were the result of active and deliberate
dishonesty and were material to the cause of action so  adjudicated,  or that he
or she personally  gained in fact a financial profit or other advantage to which
he or she was not legally entitled.

     Any  person  who has been  successful  on the  merits or  otherwise  in the
defense  of a civil  or  criminal  action  or  proceeding  will be  entitled  to
indemnification. Except as provided in the preceding sentence, unless ordered by
a court pursuant to the NYBCL, any  indemnification  under the NYBCL pursuant to
the above  paragraphs  may be made only if  authorized  in the specific case and
after a finding  that the  director  or officer  met the  requisite  standard of
conduct (i) by the disinterested  directors if a quorum is available, or (ii) in
the event a quorum of disinterested  directors is not available or so directs by
either (A) the board upon the written opinion of independent  legal counsel,  or
(B) by the shareholders.

                                       45
<PAGE>

     The Omnicom By-laws provide that Omnicom shall provide  indemnification  to
its directors and officers in respect of claims,  actions,  suits or proceedings
based  upon,  arising  from,  relating to or by reason of the fact that any such
director or officer  serves or served in such  capacity  with  Omnicom or at the
request  of Omnicom  in any  capacity  with any other  enterprise,  and  permits
Omnicom to  indemnify  others  and to advance  expenses  to the  fullest  extent
permitted by law.

     Insofar as indemnification for liabilities arising under the Securities Act
may be  permitted  to  directors,  officers  or persons  controlling  Omnicom or
Ketchum  pursuant to the  foregoing  provisions,  Omnicom and Ketchum  have been
informed that in the opinion of the SEC such  indemnification  is against public
policy as expressed in the Securities Act and is therefore unenforceable.

Limitation of Personal Liability of Directors

     Under  Pennsylvania  law, a by-law adopted by the  shareholders may provide
that, except in the case of responsibility or liability under a criminal statute
or liability for payment of local,  state or federal taxes, a director shall not
be  personally  liable for  monetary  damages  for any action  taken  unless the
director has breached or failed to perform his or her  fiduciary  duties and the
breach or failure to perform  constituted  self dealing,  willful  misconduct or
recklessness.  The  Ketchum  By-laws  provide  that  a  director  shall  not  be
personally  liable for  monetary  damages for any action taken or the failure to
take any action  unless the director  breached his or her  fiduciary  duties and
such breach constituted  self-dealing,  willful  misconduct or recklessness.  In
addition,  the Ketchum  By-laws  provide that such  limitations  on the personal
liability of directors does not extend to liability under a criminal  statute or
for the liability for payment of taxes under local, state or federal law.

     Section  402(b) of the NYBCL provides that a  corporation's  certificate of
incorporation  may contain a provision  eliminating  or  limiting  the  personal
liability of directors to the  corporation or its  shareholders  for damages for
any breach of duty in such capacity. However, no such provision can eliminate or
limit  (i)  the  liability  of  any  director  if  a  judgment  or  other  final
adjudication  adverse to such director  establishes that such director's acts or
omissions  were in bad faith,  or involved  intentional  misconduct or a knowing
violation  of law, or that the  director  personally  gained in fact a financial
profit or other  advantage to which such  director  was not legally  entitled or
that the director's  acts violated  certain  provisions of the NYBCL or (ii) the
liability of any director for any act or omission  prior to the adoption of such
a provision in the certificate of incorporation.

     The  Omnicom  Certificate  provides  that no director  shall be  personally
liable to Omnicom or any of its  shareholders for damages for any breach of duty
as a director,  except for  liability  resulting  from a judgment or other final
adjudication  adverse to the  director (i) for acts or omissions in bad faith or
which involve intentional misconduct or a knowing violation of the law, (ii) for
any  transaction  from which the  director  derived a financial  profit or other
advantage to which the director was not legally entitled, or (iii) under Section
719 of the NYBCL.

                                  LEGAL MATTERS

     The  legality of the  issuance of the Omnicom  Common Stock to be issued in
the Merger will be passed upon by Davis & Gilbert, 1740 Broadway,  New York, New
York 10019, counsel to Omnicom.

                                     EXPERTS

     The  consolidated  financial  statements  and  schedules of Omnicom and its
subsidiaries incorporated by reference in this Prospectus/Information  Statement
and the Registration Statement of which this Prospectus/Information Statement is
a part have been audited by Arthur Andersen LLP, independent public accountants,
as indicated in their reports with respect  thereto,  and are included herein in
reliance upon the authority of said firm as an expert in giving said reports.

     The  consolidated   financial  statements  of  Ketchum  contained  in  this
Prospectus/Information  Statement and the  Registration  Statement of which this
Prospectus/Information  Statement  is a part have been  audited  by  Deloitte  &
Touche  LLP,  independent  auditors,  as stated in their  reports  with  respect
thereto,  and are included herein in reliance upon the authority of such firm as
experts in accounting and auditing.

                                       46
<PAGE>

                      INDEX TO KETCHUM FINANCIAL STATEMENTS



                                                                           Page
                                                                           ----
Independent Auditors' Report ...........................................    F-2

Consolidated Balance Sheets as of December 31, 1995 and 1994 ...........    F-3

Consolidated Statements of Operations for the years ended
  December 31, 1995, 1994 and 1993 .....................................    F-4

Consolidated Statements of Redeemable Preferred 
  and Common Stock and Accumulated
  Deficit for the years ended December 31, 1995, 1994 and 1993 .........    F-5

Consolidated Statements of Cash Flows for the years ended
  December 31, 1995, 1994 and 1993 .....................................    F-6

Notes to Consolidated Financial Statements .............................    F-7


                                      F-1
<PAGE>

                          INDEPENDENT AUDITORS' REPORT

To the Board of Directors of
Ketchum Communications Holdings, Inc.:

     We have audited the  accompanying  consolidated  balance  sheets of Ketchum
Communications Holdings, Inc. and subsidiaries as of December 31, 1995 and 1994,
and the related consolidated statements of operations,  redeemable preferred and
common stock and accumulated deficit, and cash flows for each of the three years
in the period ended  December  31,  1995.  These  financial  statements  are the
responsibility of the Company's management.  Our responsibility is to express an
opinion on these financial statements based on our audits.

     We conducted  our audits in accordance  with  generally  accepted  auditing
standards.  Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement.  An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An audit also includes
assessing the  accounting  principles  used and  significant  estimates  made by
management,  as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

     In our opinion,  such consolidated  financial statements present fairly, in
all  material  respects,   the  financial  position  of  Ketchum  Communications
Holdings,  Inc.  and  subsidiaries  as of December  31,  1995 and 1994,  and the
results of their  operations and their cash flows for each of the three years in
the period  ended  December  31,  1995 in  conformity  with  generally  accepted
accounting principles.

     The  accompanying  consolidated  financial  statements  have been  prepared
assuming that the Company will continue as a going concern.  As indicated in the
accompanying consolidated financial statements,  the Company incurred a net loss
for  the  year  ended  December  31,  1995  and  has  an  accumulated   deficit.
Additionally,  as  discussed in Note 2, the Company was not in  compliance  with
certain  terms of a long-term  debt  agreement at December  31,  1995,  and as a
result,  the  holder of the debt has the right to declare  the entire  amount of
such  indebtedness  and a penalty,  due and  payable  immediately.  Further,  as
described in Note 14, the Company has lost a judgement  which will require it to
pay approximately  $4,000,000 currently and, as described in Note 6, as a result
of  borrowings  subsequent to December 31, 1995,  the Company has  approximately
$80,000 of available borrowing capacity and is in violation of certain covenants
under its revolving credit agreement as of March 6, 1996. These conditions raise
substantial  doubt about the Company's  ability to continue as a going  concern.
Management's  plans  concerning  these matters are also described in Note 2. The
accompanying  consolidated  financial  statements do not include any adjustments
that might result from the outcome of this uncertainty.

     As discussed in Note 1 to the consolidated financial statements,  effective
January 1, 1993, the Company changed its method of accounting for income taxes.


Deloitte & Touche LLP
Pittsburgh, Pennsylvania

March 6, 1996


                                      F-2

<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS
                           December 31, 1995 and 1994
<TABLE>
<CAPTION>
                                                                      1995              1994
                                                                  ------------      ------------
<S>                                                               <C>               <C>         
                                     ASSETS
Current assets:
  Cash and cash equivalents ...................................   $  2,878,839      $  2,492,123
  Investments--at market value.................................      1,552,702         1,241,992
  Accounts receivable, net of allowance for
    doubtful accounts of $617,000 and $180,000 
    in 1995 and 1994, respectively.............................     63,539,028        58,999,876
  Billable production in process, net of allowance 
    for unrealizable amounts of $144,000 in 1995 ..............     28,753,299        26,298,872
  Prepaid expenses and other assets............................      1,598,783         1,993,652
  Deferred income taxes........................................      1,704,824             --
                                                                  ------------      ------------
    Total current assets .....................................     100,027,475        91,026,515
                                                                  ------------      ------------
Property and equipment--at cost:
  Leasehold improvements .....................................       8,758,872        10,845,410
  Furniture and equipment ....................................      24,149,017        25,859,995
                                                                  ------------      ------------
                                                                    32,907,889        36,705,405
  Less accumulated depreciation and amortization .............      21,533,577        21,779,347
                                                                  ------------      ------------
    Net property and equipment ...............................      11,374,312        14,926,058
Excess of cost over fair value of net assets acquired,
   less accumulated amortization of $3,829,466 and 
   $3,531,636 in 1995 and 1994, respectively .................       9,339,536        12,565,338
Other assets .................................................       6,881,065         6,247,993
                                                                  ------------      ------------
      Total assets ...........................................    $127,622,388      $124,765,904
                                                                  ============      ============

                       LIABILITIES AND ACCUMULATED DEFICIT
Current liabilities:
  Debt classified as current, due to covenant violations......    $ 11,571,429      $      --
  Notes payable--short-term ..................................       1,769,582         1,816,117
  Current maturities of long-term debt .......................       2,755,304         2,954,418
  Accounts payable ...........................................      67,927,190        60,195,861
  Client deposits ............................................      12,796,597        10,849,559
  Other accrued expenses .....................................      11,058,237         5,700,498
  Accrued employee benefit plan contributions ................       1,544,871         2,075,796
  Accrued income taxes .......................................       2,500,782           554,727
                                                                  ------------      ------------
    Total current liabilities ................................     111,923,992        84,146,976
                                                                  ------------      ------------
Long-term debt ...............................................       3,804,056        15,639,922
Deferred income taxes ........................................         556,133         2,390,109
Other liabilities.............................................       3,795,148         4,208,091
Redeemable cumulative preferred stock, voting, $100 par, 
   $1,000 redemption value; authorized 50,000 shares: 
    Series A, 20,000 shares authorized, outstanding 8,035
      and 4,990.5 shares in 1995 and 1994, respectively
      --at redemption value ..................................       8,035,000         4,990,500
Common stock subject to repurchase obligations:
  Common stock, no par value (stated value $.005); 
    authorized 2,000,000 shares; issued 1,364,000 shares,
    outstanding 347,125 and 460,412 shares in 1995 
    and 1994, respectively....................................           6,820             6,820
  Repurchase obligations in excess of stated value ...........      20,824,151        25,817,689
  Notes receivable for common stock ..........................      (3,373,721)       (3,823,379)
                                                                  ------------      ------------
    Common stock subject to repurchase obligations--net.......      17,457,250        22,001,130
                                                                  ------------      ------------
Accumulated deficit: 
  Retained deficit ...........................................     (18,154,220)       (8,282,950)
  Cumulative translation adjustment ..........................         205,029           161,427
  Unrealized loss on investments .............................           --             (489,301)
                                                                  ------------      ------------
    Total accumulated deficit.................................     (17,949,191)       (8,610,824)
                                                                  ------------      ------------
    Total liabilities and accumulated deficit.................    $127,622,388      $124,765,904
                                                                  ============      ============
</TABLE>

                 The accompanying notes to financial statements
                    are an integral part of these statements

                                      F-3
<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF OPERATIONS
                  Years ended December 31, 1995, 1994 and 1993

<TABLE>
<CAPTION>

                                                          1995              1994              1993
                                                       -----------       -----------       ----------- 
<S>                                                   <C>               <C>               <C>         
Commissions and fees..............................    $127,387,710      $124,060,534      $129,510,331
                                                       -----------       -----------       ----------- 

Operating expenses:
  Compensation and employee benefits..............      75,245,914        73,826,994        76,229,397
  General agency expense..........................      49,476,176        43,355,612        47,597,260
  Other expense...................................       9,562,184           252,834         1,958,932
  Restructuring charges...........................             --                --          8,778,572
                                                       -----------       -----------       ----------- 
    Total operating expenses......................     134,284,274       117,435,440       134,564,161
                                                       -----------       -----------       ----------- 

Operating (loss) income...........................      (6,896,564)        6,625,094        (5,053,830)

Interest expense..................................       2,029,160         2,667,644         2,435,243
Other income, net.................................      (1,203,632)         (714,094)         (685,503)
                                                       -----------       -----------       ----------- 

(Loss) income before income taxes.................      (7,722,092)        4,671,544        (6,803,570)

Income tax (benefit) expense......................        (182,331)        2,579,241        (1,269,052)
                                                       -----------       -----------       ----------- 

Net (loss) income.................................     $(7,539,761)      $ 2,092,303       $(5,534,518)
                                                       ===========       ===========       =========== 

Net (loss) income per common share................     $    (21.82)      $      3.67       $    (10.55)
                                                       ===========       ===========       =========== 

Weighted average number of shares outstanding.....         373,342           470,100           529,983
                                                       ===========       ===========       =========== 
</TABLE>

                 The accompanying notes to financial statements
                    are an integral part of these statements

                                      F-4
<PAGE>


             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES


        CONSOLIDATED STATEMENTS OF REDEEMABLE PREFERRED AND COMMON STOCK
                             AND ACCUMULATED DEFICIT

                  Years ended December 31, 1995, 1994 and 1993

<TABLE>
<CAPTION>
                                                                     
                                                    Redeemable Preferred Stock     
                                                   ----------------------------     
                                                     Shares                       
                                                   Outstanding         Amount        
                                                   -----------       ----------        
<S>                                                    <C>          <C>      
Balance, January 1, 1993 .....................          --          $      --
  Net loss ...................................          --                 --   
  Dividends on common stock ..................          --                 --   
  Dividends on preferred stock ...............          --                 --   
  Purchase of common shares ..................          --                 --   
  Sale of common shares ......................          --                 --   
  Net increase in obligations due to
    increase in repurchase price .............          --                 --   
  Payments received on notes
    receivable for common stock ..............          --                 --   
  Sale of preferred shares ...................         2,500.5        2,500,500
  Purchase of preferred shares ...............           (30.0)         (30,000)
  Translation adjustment .....................          --                 --   
  Unrealized market value adjustment .........          --                 --   
                                                     ---------      -----------
Balance, December 31, 1993 ...................         2,470.5        2,470,500
  Net income .................................          --                 --   
  Dividends on common stock ..................          --                 --   
  Dividends on preferred stock ...............           229.0          229,000
  Purchase of common shares ..................          --                 --   
  Sale of common shares ......................          --                 --   
  Net increase in obligations due to
    increase in repurchase price .............          --                 --   
  Payments received on notes
    receivable for common stock ..............          --                 --   
  Sale of preferred shares ...................         2,366.0        2,366,000
  Purchase of preferred shares ...............           (75.0)         (75,000)
  Translation adjustment .....................          --                 --   
  Unrealized market value adjustment .........          --                 --   
                                                     ---------      -----------
Balance, December 31, 1994 ...................         4,990.5        4,990,500
  Net loss ...................................          --                 --   
  Dividends on common stock ..................          --                 --   
  Dividends on preferred stock ...............           378.0          378,000
  Purchase of common shares ..................          --                 --   
  Sale of common shares ......................          --                 --   
  Net increase in obligations due to
    increase in repurchase price .............          --                 --   
  Payments received on notes
    receivable for common stock ..............          --                 --   
Translation adjustment .......................          --                 --   
Sale of preferred shares .....................         3,265.5        3,265,500
Purchase of preferred shares .................          (599.0)        (599,000)
Write-down of investment .....................          --                 --   
                                                     ---------      -----------
Balance, December 31, 1995 ...................         8,035.0      $ 8,035,000
                                                     =========      ===========

<CAPTION>

                                                        Common Stock Subject to Repurchase Obligations              
                                           -------------------------------------------------------------------------
                                                              Stated     Repurchase        Notes                         
                                             Common          Value of   Obligations      Receivable                      
                                             Shares           Common    In Excess of     for Common                      
                                           Outstanding         Stock    Stated Value        Stock           Total        
                                         ------------    ------------   ------------    ------------    ------------   
<S>                                           <C>            <C>        <C>             <C>             <C>            
Balance, January 1, 1993 ...........          617,614        $  6,820   $ 31,472,966    $ (5,519,459)   $ 25,960,327   
  Net loss .........................             --              --             --              --              --     
  Dividends on common stock ........             --              --             --              --              --     
  Dividends on preferred stock .....             --              --             --              --              --     
  Purchase of common shares ........         (147,496)           --       (7,625,094)           --        (7,625,094)  
  Sale of common shares ............           19,210            --          965,879        (898,001)         67,878   
  Net increase in obligations due to                                                                                   
    increase in repurchase price ...             --              --        1,387,837            --         1,387,837   
  Payments received on notes                                                                                           
    receivable for common stock ....             --              --             --         1,717,905       1,717,905   
  Sale of preferred shares .........             --              --             --              --              --     
  Purchase of preferred shares .....             --              --             --              --              --     
  Translation adjustment ...........             --              --             --              --              --     
  Unrealized market value adjustment             --              --             --              --              --     
                                         ------------    ------------   ------------    ------------    ------------   
Balance, December 31, 1993 .........          489,328           6,820     26,201,588      (4,699,555)     21,508,853   
  Net income .......................             --              --             --              --              --     
  Dividends on common stock ........             --              --             --              --              --     
  Dividends on preferred stock .....             --              --             --              --              --     
  Purchase of common shares ........          (57,600)           --       (2,995,227)           --        (2,995,227)  
  Sale of common shares ............           28,684            --        1,466,825        (494,854)        971,971   
  Net increase in obligations due to                                                                                   
    increase in repurchase price ...             --              --        1,144,503            --         1,144,503   
  Payments received on notes                                                                                           
    receivable for common stock ....             --              --             --         1,371,030       1,371,030   
  Sale of preferred shares .........             --              --             --              --              --     
  Purchase of preferred shares .....             --              --             --              --              --     
  Translation adjustment ...........             --              --             --              --              --     
  Unrealized market value adjustment             --              --             --              --              --     
                                         ------------    ------------   ------------    ------------    ------------   
Balance, December 31, 1994 .........          460,412           6,820     25,817,689      (3,823,379)     22,001,130   
  Net loss .........................             --              --             --              --              --     
  Dividends on common stock ........             --              --             --              --              --     
  Dividends on preferred stock .....             --              --             --              --              --     
  Purchase of common shares ........         (140,103)           --       (7,798,915)           --        (7,798,915)  
  Sale of common shares ............           26,816            --        1,446,618      (1,222,297)        224,321   
  Net increase in obligations due to                                                                                   
    increase in repurchase price ...             --              --        1,358,759            --         1,358,759   
  Payments received on notes                                                                                           
    receivable for common stock ....             --              --             --         1,671,955       1,671,955   
Translation adjustment .............             --              --             --              --              --     
Sale of preferred shares ...........             --              --             --              --              --     
Purchase of preferred shares .......             --              --             --              --              --     
Write-down of investment ...........             --              --             --              --              --     
                                         ------------    ------------   ------------    ------------    ------------   
Balance, December 31, 1995 .........          347,125    $      6,820   $ 20,824,151    $ (3,373,721)   $ 17,457,250   
                                         ============    ============   ============    ============    ============   
                                                                                                                       
<CAPTION>
                                                                         Accumulated Deficit
                                        --------------------------------------------------------------------------------------------
                                                        Retained Deficit
                                        ---------------------------------------------
                                                         Increase in                      Cumulative      Unrealized                
                                          Retained        Repurchase       Retained       Translation      Loss on                  
                                          Earnings       Obligations       Deficit        Adjustment     Investments       Total    
                                        ------------    ------------    ------------    ------------    ------------   ------------ 
<S>                                     <C>             <C>             <C>             <C>             <C>            <C>          
Balance, January 1, 1993 ...........    $ 39,974,427    $(40,888,951)   $   (914,524)   $    174,906    $   (387,500)  $ (1,127,118)
  Net loss .........................      (5,534,518)           --        (5,534,518)           --              --       (5,534,518)
  Dividends on common stock ........        (509,107)           --          (509,107)           --              --         (509,107)
  Dividends on preferred stock .....         (56,032)           --           (56,032)           --              --          (56,032)
  Purchase of common shares ........            --              --              --              --              --             --   
  Sale of common shares ............            --              --              --              --              --             --   
  Net increase in obligations due to                                                                                                
    increase in repurchase price ...            --        (1,387,837)     (1,387,837)           --              --       (1,387,837)
  Payments received on notes                                                                                                        
    receivable for common stock ....            --              --              --              --              --             --   
  Sale of preferred shares .........            --              --              --              --              --             --   
  Purchase of preferred shares .....            --              --              --              --              --             --   
  Translation adjustment ...........            --              --              --           113,051            --          113,051 
  Unrealized market value adjustment            --              --              --              --           (84,309)       (84,309)
                                        ------------    ------------    ------------    ------------    ------------   ------------ 
Balance, December 31, 1993 .........      33,874,770     (42,276,788)     (8,402,018)        287,957        (471,809)    (8,585,870)
  Net income .......................       2,092,303            --         2,092,303            --              --        2,092,303 
  Dividends on common stock ........        (460,958)           --          (460,958)           --              --         (460,958)
  Dividends on preferred stock .....        (367,774)           --          (367,774)           --              --         (367,774)
  Purchase of common shares ........            --              --              --              --              --             --   
  Sale of common shares ............            --              --              --              --              --             --   
  Net increase in obligations due to                                                                                                
    increase in repurchase price ...            --        (1,144,503)     (1,144,503)           --              --       (1,144,503)
  Payments received on notes                                                                                                        
    receivable for common stock ....            --              --              --              --              --             --   
  Sale of preferred shares .........            --              --              --              --              --             --   
  Purchase of preferred shares .....            --              --              --              --              --             --   
  Translation adjustment ...........            --              --              --          (126,530)           --         (126,530)
  Unrealized market value adjustment            --              --              --              --           (17,492)       (17,492)
                                        ------------    ------------    ------------    ------------    ------------   ------------ 
Balance, December 31, 1994 .........      35,138,341     (43,421,291)     (8,282,950)        161,427        (489,301)    (8,610,824)
  Net loss .........................      (7,539,761)           --        (7,539,761)           --              --       (7,539,761)
  Dividends on common stock ........        (367,567)           --          (367,567)           --              --         (367,567)
  Dividends on preferred stock .....        (605,183)           --          (605,183)           --              --         (605,183)
  Purchase of common shares ........            --              --              --              --              --             --   
  Sale of common shares ............            --              --              --              --              --             --   
  Net increase in obligations due to                                                                                                
    increase in repurchase price ...            --        (1,358,759)     (1,358,759)           --              --       (1,358,759)
  Payments received on notes                                                                                                        
    receivable for common stock ....            --              --              --              --              --             --   
Translation adjustment .............            --              --              --            43,602            --           43,602 
Sale of preferred shares ...........            --              --              --              --              --             --   
Purchase of preferred shares .......            --              --              --              --              --             --   
Write-down of investment ...........            --              --              --              --           489,301        489,301 
                                        ------------    ------------    ------------    ------------    ------------   ------------ 
Balance, December 31, 1995 .........    $ 26,625,830    $(44,780,050)   $(18,154,220)   $    205,029    $       --     $(17,949,191)
                                        ============    ============    ============    ============    ============   ============ 

</TABLE>

                 The accompanying notes to financial statements
                    are an integral part of these statements

                                      F-5
<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF CASH FLOWS
                  Years ended December 31, 1995, 1994 and 1993

<TABLE>
<CAPTION>
                                                                         1995              1994              1993
                                                                    --------------   --------------     --------------
<S>                                                                  <C>                 <C>              <C>         
Cash Flow from Operating Activities:
  Net (loss) income.............................................     $ (7,539,761)       $2,092,303       $(5,534,518)
  Adjustments to reconcile net (loss) income to net cash
   provided by operating activities:
    Depreciation and amortization...............................        5,350,692         6,089,247         6,312,604
    Loss on disposal of property and equipment..................          450,001               --             14,487
    Write-off of excess of cost over fair value of net 
     assets acquired and investments in equity investees........        2,759,426               --          1,054,541
    Provision for bad debts.....................................          581,000          (145,322)           41,455
    Gain on sale of investments.................................              --            (43,452)              --
    Restructuring charges.......................................              --                --          8,778,572
    Write-off of notes receivable from equity investees.........        1,118,051               --            893,870
    Write-down of marketable equity security....................          504,301               --                --
    Gain on sale of office......................................         (400,000)              --                --
    Deferred taxes..............................................       (3,538,800)          680,241        (3,010,452)
    Other-net...................................................          142,884        (1,105,017)         (699,015)
    Changes in operating assets and liabilities:
     Accounts receivable........................................       (4,976,152)       (2,088,640)        4,684,478
     Billable production in process.............................       (2,598,427)        1,695,205        (3,936,725)
     Prepaid expenses and other assets..........................          394,869           203,743           461,702
     Accounts payable...........................................        7,731,329        (4,619,593)          803,253
     Client deposits............................................        1,947,038         2,152,275          (316,678)
     Other accrued expenses.....................................        4,801,240           491,135           554,458
     Accrued employee benefit plan contributions................         (530,925)           35,334        (1,730,091)
     Accrued income taxes.......................................        1,946,055           554,727          (602,564)
                                                                      -----------       -----------       -----------
     Net cash provided by operating activities..................        8,142,821         5,992,186         7,769,377
                                                                      -----------       -----------       -----------
Cash Flow from Investing Activities:
  Additions to property and equipment...........................         (854,027)       (4,580,550)       (2,547,129)
  Payments for acquisitions and equity investments..............       (1,560,904)       (2,388,427)       (3,234,524)
  Dividends received from equity investees......................              --            120,064           473,646
  Purchase of investments.......................................         (831,727)       (1,186,352)         (229,902)
  Sale of investments...........................................          505,977           589,612           105,438
  Proceeds from sale of office..................................          400,000               --                --
  Advances to equity investees..................................       (1,118,051)              --           (893,870)
                                                                      -----------       -----------       -----------
    Net cash used in investing activities.......................       (3,458,732)       (7,445,653)       (6,326,341)
                                                                      -----------       -----------       -----------
Cash Flow from Financing Activities:
  Proceeds from long-term borrowings............................              --          3,000,000         1,519,202
  Repayments of long-term debt..................................       (2,822,012)       (4,340,857)       (5,473,142)
  Cash dividends paid...........................................         (594,750)         (599,732)         (565,137)
  Repurchases of preferred stock................................         (599,000)          (75,000)          (30,000)
  Proceeds from sales of preferred stock........................        3,265,500         2,366,000         2,500,500
  Purchases of common stock.....................................       (5,486,989)       (1,872,273)       (4,117,596)
  Payments received on notes receivable for common stock........        1,671,955         1,371,030         1,717,905
  Proceeds from sale of common stock............................          224,321           971,971            67,878
                                                                      -----------       -----------       -----------
    Net cash (used in) provided by operations...................       (4,340,975)          821,139        (4,380,390)
                                                                      -----------       -----------       -----------
Effect of Currency Exchange Rates on Cash and Cash Equivalents..           43,602          (126,530)          113,051
                                                                      -----------       -----------       -----------
Net Increase (Decrease) in Cash and Cash Equivalents............          386,716          (758,858)       (2,824,303)
Cash and Cash Equivalents at Beginning of Year..................        2,492,123         3,250,981         6,075,284
                                                                      -----------       -----------       -----------
Cash and Cash Equivalents at End of Year........................      $ 2,878,839       $ 2,492,123       $ 3,250,981
                                                                      ===========       ===========       ===========
</TABLE>

Supplemental schedule of noncash investing and financing activities:

The  Company  incurred  liabilities  of  $770,499  for  acquisitions  and equity
investments during 1995.

The Company  issued  preferred  stock of $378,000  and  $229,000  for payment of
dividends on preferred stock during 1995 and 1994, respectively.

The Company received notes of $1,222,296, $494,854 and $898,001 for the issuance
of common stock during 1995, 1994 and 1993, respectively.

The Company  issued notes payable of  $2,311,926,  $1,122,954 and $3,507,498 for
the repurchase of common stock during 1995, 1994 and 1993, respectively.

The Company entered into capital lease obligations for property and equipment of
$557,272 and $271,054 in 1994 and 1993, respectively.

                 The accompanying notes to financial statements
                    are an integral part of these statements

                                      F-6
<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

                  Years ended December 31, 1995, 1994 and 1993

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     a. Principles of  Consolidation -- The  consolidated  financial  statements
include the accounts of Ketchum Communications  Holdings, Inc. ("Ketchum" or the
"Company") and subsidiaries,  U.S. and non-U.S., for which ownership exceeds 50%
of the voting  stock.  Investments  in companies  ranging from 20% to 50% of the
voting stock are carried at equity, and a proportionate share of the earnings or
losses of such equity  investees is included in the  statements  of  operations.
Transactions   between   Ketchum  and  its   subsidiaries   are   eliminated  in
consolidation.
  
     b. Use of  Estimates in the  Preparation  of  Financial  Statements  -- The
preparation  of financial  statements  in  conformity  with  generally  accepted
accounting principles requires management to make estimates and assumptions that
affect the reported  amounts of assets and  liabilities  and the  disclosure  of
contingent  assets and liabilities at the date of the financial  statements,  as
well as the reported amounts of income and expenses during the reporting period.
Actual results could differ from those estimates.
      
     c. Cash Equivalents -- The Company considers all highly liquid  investments
purchased  with  an  original  maturity  of  three  months  or  less  to be cash
equivalents.

     d. Revenue  Recognition -- Revenue is derived from commissions and fees for
production and placement of  advertising,  public  relations,  sales  promotion,
research and other services.  Depending upon the nature of the service,  revenue
is recognized  in the month in which  advertisements  appear,  when services are
rendered or when costs are incurred.

     e.  Billable  Production  in  Process  --  Billable  production  in process
includes  outside  services  and  materials  plus  commissions  and fees,  where
applicable,  and the value of internal time incurred and are stated at the lower
of accumulated charges or estimated realizable amounts.

     f. Depreciation and Amortization of Property and Equipment -- Furniture and
equipment are depreciated on the straight-line basis over their estimated useful
lives which range from five to ten years.  Leasehold  improvements are amortized
on the  straight-line  basis over the shorter of the lives of the related leases
or the  estimated  useful lives of the  improvements,  which range from three to
twenty years.

     Included in property and  equipment  are leased assets at December 31, 1995
and 1994 of $1,136,800 and $2,470,700, respectively. Leased assets are amortized
on the straight-line basis over the lives of the related leases which range from
three to five years.  Accumulated amortization at December 31, 1995 and 1994 was
$495,700 and $916,400, respectively.

     g. Excess of cost over fair value of net assets  acquired -- The  Company's
policy is to periodically  evaluate the carrying value of the excess of the cost
over the fair  value of net assets of  businesses  acquired  based on  estimated
future results of operations and cash flows of the related subsidiaries.

     The excess of cost over fair value of net assets of businesses  acquired is
amortized  on the  straight-line  method  over the  expected  periods  of future
benefit, which range from five to twenty years.

     In March 1995, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standard ("SFAS") No. 121 "Accounting for the Impairment of
Long-Lived  Assets and  Long-Lived  Assets to Be Disposed Of." This statement is
effective for years beginning after December 15, 1995. The general  requirements
of SFAS No.  121  apply to  non-current  assets  and  require  impairment  to be
considered  whenever  evidence suggests that future cash flows will not at least
equal the carrying  value of the asset.  Ketchum has not adopted SFAS No. 121 at
December 31,  1995.  Management  does not believe the adoption of this  standard
will have a material impact on the Company's  financial condition or the results
of its operations.

      h. Income Taxes -- Effective January 1, 1993, the Company adopted SFAS No.
109,  "Accounting for Income Taxes." The Company had previously  recorded income
taxes in accordance with SFAS No. 96,  "Accounting  for Income Taxes."  Deferred
income taxes  reflect the future tax  consequences  of  differences  between the


                                      F-7
<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

financial  reporting  and tax  reporting  bases of assets and  liabilities.  The
cumulative effect of this 1993 change in accounting principle was insignificant.
The change had no effect upon 1993 results of operations.

      i. Foreign Currency Translation -- The Company translates foreign currency
assets and  liabilities  using the exchange rates in effect at the balance sheet
date.  Results of operations  are  translated  using the average  exchange rates
prevailing  throughout  the year.  Translation  adjustments  are  deferred  as a
separate component in accumulated deficit.

      j. Net  (Loss)  Income Per  Common  Share -- Net (loss)  income per common
share is based on net (loss) income after  dividends on preferred  stock and the
weighted  average  number of common  shares  outstanding  during  the year.  The
Company does not have common stock equivalents.

      k.  Investments -- Effective  January 1, 1994 the Company adopted SFAS No.
115,  "Accounting  for Certain  Investments  in Debt and Equity  Securities"  to
account  for its  investments.  This  statement  expands  the use of fair  value
accounting for certain investments while retaining the amortized cost method for
investments in certain debt securities  based on a company's  intent and ability
to hold the investments to maturity. The adoption of this standard had no effect
upon 1994 results of operations.

      The Company's investments consist primarily of certificates of deposit and
marketable  equity  securities.  The marketable equity securities are classified
based on SFAS No. 115 as "available-for-sale" and are stated at market value. At
December  31, 1995 the  carrying  value of all  investments  approximates  their
market value. The aggregate carrying value and market value of marketable equity
securities  at  December  31,  1994  was  $504,301  and  $15,000,  respectively.
Unrealized  holding losses of $489,301 net of deferred  taxes,  including a 100%
tax asset  valuation  allowance  of $201,380,  was  included in the  accumulated
deficit  section of the  consolidated  balance  sheet at December 31, 1994.  The
market value of other investments at December 31, 1994 approximated cost.

      l. Financial  Instruments -- The Company's financial instrument portfolio,
excluding  investments,  consists  primarily  of cash and cash  equivalents  and
short-  and  long-term  debt  instruments.   The  most  significant  instrument,
long-term debt, had a carrying value which  approximated  the fair market value.
The fair market value was  determined  based upon a present  value  technique of
estimating  future cash flows using a discount rate  commensurate with the risks
involved. The fair values of the other instruments  approximated carrying value.

2. GOING CONCERN

      The Company  incurred a net loss for the year ended  December 31, 1995 and
has an accumulated deficit. In addition,  the Company was not in compliance with
certain terms of a long-term debt instrument at December 31, 1995 and the holder
of the debt has the right to declare the entire amount of such  indebtedness and
a penalty,  due and payable  immediately (see Note 6). Further,  as described in
Note  14,  the  Company  has  lost a  judgement  which  will  require  it to pay
approximately  $4,000,000  currently and, as described in Note 6, as a result of
borrowings  subsequent  to December  31,  1995,  the  Company has  approximately
$80,000 of available borrowing capacity and is in violation of certain covenants
under its revolving  credit  agreement as of March 6, 1996. As a result of these
factors,  substantial  doubt exists about the Company's ability to continue as a
going concern.  The financial statements have been prepared assuming the Company
will continue as a going concern and do not contain any  adjustments  that might
result from this uncertainty.

     In response to these  conditions,  the Company's  management  has initiated
discussions  with its principal  lender and has also  contacted  another  lender
regarding the possibility of obtaining  financing.  As discussed in Note 15, the
Company is  presently  negotiating  a possible  merger with  Omnicom  Group Inc.
("Omnicom").

3. NATURE OF OPERATIONS

     Ketchum is an agency  comprised  of four  autonomous  operating  divisions,
advertising,   public   relations,   directory   advertising  and  health  care.
Advertising  and public  relations  are the  largest  divisions  as  measured by
commissions  and fees.  Ketchum's  primary  operations  are based in the  United
States.  International  operations  comprised 7%, 6% and 5% of total commissions
and fees for the years ended  December  31, 1995,  1994 and 1993,  respectively.

                                      F-8
<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

International  assets were  approximately  8% and 6% of total assets at December
31, 1995 and 1994, respectively. Approximately 18% of total commissions and fees
was  attributable  to one major client for each of the years ended  December 31,
1995, 1994 and 1993. A portion of the business for this major client was lost in
the fourth quarter of 1995.

4. IMPAIRMENT OF EXCESS OF COST OVER FAIR VALUE OF NET ASSETS ACQUIRED

      As a result of management's periodic analysis of the recoverability of the
carrying value of the excess of cost over the fair value of net assets acquired,
management  wrote down the carrying  value at December 31, 1995 in the amount of
$2,759,426.  Management's  analysis  was based on  undiscounted  cash  flows and
expected  performance of the related  operations  which did not support that the
carrying  value of the excess of cost over fair value of net assets  acquired is
realizable. There was no impairment loss in 1994. A similar analysis at December
31, 1993 resulted in an impairment loss of $340,076.

5. OTHER ASSETS

     Other assets include approximately $4,111,000 and $3,774,000 of investments
in equity investees at December 31, 1995 and 1994,  respectively.  Approximately
$3,182,000  and  $2,985,000  of the recorded cost at December 31, 1995 and 1994,
respectively,  represents  cost in excess of the  equity in the  underlying  net
assets of these investees. The excess of cost over equity in net assets is being
amortized  on a  straight-line  basis over  periods  ranging from ten to fifteen
years. The Company's share of net loss in equity investees, which is included in
other expense in the consolidated  statements of operations,  was  approximately
$723,273  and  $252,834  for  the  years  ended  December  31,  1995  and  1994,
respectively.  The Company's share of net loss in equity  investees for 1993 was
insignificant.  Notes receivable from certain equity investees have been written
off in 1995 and 1993 (see Note 14). The Company did not receive  dividends  from
equity  investees  in 1995.  The Company  received  dividends  of  approximately
$120,000 and $474,000 in 1994 and 1993, respectively.

6. FINANCING ARRANGEMENTS

<TABLE>
<CAPTION>

   Long-term debt consists of the following:
                                                                                       December 31,
                                                                               ------------------------------
                                                                                   1995             1994
                                                                               ------------     -------------
<S>                                                                             <C>             <C>  
   9% unsecured  senior  notes due  August 1, 2004,  principal 
      payable in equal annual installments of $1,653,061
      beginning August 1, 1998 through August 1, 2004, interest
      payable semi-annually (see below) .....................................   $11,571,429     $11,571,429

   Unsecured promissory notes, with interest rates ranging from
      approximately 7% to 10%, issued under the Company's
      common stock repurchase agreement, due through
      January 1, 2000 (see Note 8) ..........................................     5,749,433       5,660,682

   Capital lease obligations, with interest rates ranging from 6% to
      15%, net of imputed interest ..........................................       610,488       1,034,458
   Other ....................................................................       199,439         327,771
                                                                                -----------     -----------
                                                                                 18,130,789      18,594,340
   Less:
     Debt classified as current, due to covenant violations .................    11,571,429           --       
     Currently scheduled maturities .........................................     2,755,304       2,954,418
                                                                                -----------     -----------
                                                                                $ 3,804,056     $15,639,922
                                                                                ===========     ===========
</TABLE>

     Foreign   subsidiaries   have  outstanding   short-term  notes  payable  of
$1,769,582 and $1,816,117 with a weighted average interest rate of 9.4% and 9.9%
at December 31, 1995 and 1994, respectively.


                                      F-9
<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

     The Company has an $8,000,000  revolving  credit agreement which expires on
September 30, 1996, at which time any outstanding balance is due and payable. Of
this amount, approximately $1,000,000 is reserved against guarantees for foreign
credit facilities.  In connection with the agreement, the Company is required to
pay a .5%  commitment  fee on any unused  portion.  No amounts were  outstanding
under the  revolving  credit  agreement at December 31, 1995 and under a similar
agreement at December 31, 1994. As a result of borrowings subsequent to December
31, 1995, the Company has approximately  $80,000 of available borrowing capacity
and is in violation of certain covenants under the revolving credit agreement as
of March 6, 1996.

     On August 9, 1994,  the Company  repaid  certain  existing  senior debt and
obtained additional  financing,  via the issuance and sale by the Company of its
9% unsecured senior notes.  The unsecured  senior notes require  compliance with
certain  financial and other  covenants.  The Company was not in compliance with
certain of these  covenants at December 31, 1995. As a result of these  covenant
violations, the holder of the senior notes may declare the outstanding amount of
the indebtedness due and payable immediately and,  accordingly,  the outstanding
amount of $11,571,429 has been classified as current in the consolidated balance
sheet at December 31,  1995.  If the holder of the senior notes were to call the
notes,  an early payment  penalty would be due, which  management of the Company
estimates  to be  approximately  $1,529,000  at March 6, 1996.  In  management's
opinion,  it is  reasonably  possible  that the  holder  will call the notes and
assess  the  penalty.  No  provision  has been made for any  penalty  that might
ultimately be assessed.

     At December 31, 1995  scheduled  maturities of long-term debt together with
amounts classified as current due to covenant violations are as follows:

      Year Ending December 31,                 
      -----------------------
           1996 ..........................................      $14,326,733
           1997 ..........................................        1,854,448
           1998 ..........................................        1,140,079
           1999 ..........................................          431,895
           2000 ..........................................          340,622
           Thereafter ....................................           37,012
                                                                -----------
                                                                $18,130,789
                                                                ===========

     Interest paid was approximately  $1,963,000,  $2,796,000 and $2,455,000 for
the years ended December 31, 1995, 1994 and 1993, respectively.

     The Company is a guarantor of approximately $1,557,000 in credit facilities
available  to equity  investees  in France,  Canada and New York.  Approximately
$882,000 has been drawn on these  facilities as of December 31, 1995. The credit
facilities bear interest at rates ranging from 8.5% to 10.5%.

7. REDEEMABLE PREFERRED STOCK

     In November 1993, the Company  authorized 50,000 shares of preferred stock.
The  first  series,  Series A, was  authorized  at 5,000  shares  of  cumulative
preferred  stock  with a par value of $100 per  share.  In  December  1994,  the
Company  authorized an additional 15,000 shares of the Series A preferred stock.
The Company's profit sharing and 401(k) plan is the only holder of the preferred
stock.  The Series A cumulative  preferred  stock  dividend is $90 per annum per
share,  payable  quarterly when declared by the Board of Directors.  The Company
repurchases  preferred  stock  from the  profit  sharing  and  401(k)  plan when
participants  in the plan elect to  purchase  an  investment  option  other than
preferred stock, and when participants terminate employment with the Company and
leave the plan. The preferred stock is sold and repurchased at $1,000 per share,
the price established by an agreement between the Company and the profit sharing
and 401(k) plan.  The Company may redeem the  preferred  stock at any time after
January 1, 2003, at the option of the Board of  Directors,  at a price of $1,045

                                      F-10
<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

per share plus all accrued  and unpaid  dividends.  The stock has a  liquidation
preference over holders of common stock of $1,000 per share plus all accrued and
unpaid dividends.

8. COMMON STOCK SUBJECT TO REPURCHASE OBLIGATIONS

     Under the Company's shareholder agreements, the common stock of the Company
is both sold and  repurchased by the Company at a price  determined by a formula
based  primarily upon book value,  adjusted for certain items  determined by the
Board of Directors. At December 31, 1995, 1994 and 1993, the formula prices were
$60.01, $56.09 and $53.56 per share, respectively.

     The common stock of the Company is owned by the  employees  and the Company
is obligated to repurchase its common stock from the holders upon termination of
employment.  The total  repurchase  obligation  is recorded on the  consolidated
balance  sheets based on the formula price and number of  outstanding  shares at
each balance sheet date. A substantial  number of employees  finance all or part
of the stock  purchases  with recourse  notes issued to the Company.  The notes,
which are  collateralized  by the stock,  bear  interest at market rates and are
payable  over five to twenty  years.  The Company has an  agreement  with a bank
whereby an employee  may borrow funds from the bank to purchase  stock,  and the
borrowings  are  guaranteed  by  the  Company.   These   guaranteed   borrowings
approximated $1,869,000 at December 31, 1995.

     At the Company's  option,  amounts payable upon repurchase of common shares
are paid either by cash in a lump sum or over three to five years (see Note 6).


9. INCOME TAXES
     
     (Loss) income  before income taxes and income tax (benefit)  expense are as
follows:

                                                 Year Ended December 31,
                                      ------------------------------------------
                                         1995           1994            1993
                                      ------------ --------------  -------------
(Loss) income before income taxes
   Domestic .......................   $(8,887,926)    $4,170,272    $(6,327,745)
   International ..................     1,165,834        501,272       (475,825)
                                      ------------    ----------    -----------
      Total .......................   $(7,722,092)    $4,671,544    $(6,803,570)
                                      ===========     ==========    ===========
Income tax (benefit) expense 
Current:
   U.S.-federal ...................   $ 1,797,911     $1,556,900    $ 1,384,100
   State ..........................     1,191,425        200,400        205,000
   International ..................       367,133        141,700        152,300
                                      ------------    ----------    -----------
      Total current ...............     3,356,469      1,899,000      1,741,400
                                      ------------    ----------    -----------
Deferred:
   U.S.-federal ...................     (3,326,472)      639,427     (2,829,824)
   State ..........................       (212,328)       40,814       (180,628)
                                      ------------    ----------    -----------
      Total deferred ..............     (3,538,800)      680,241     (3,010,452)
                                      ------------    ----------    -----------
   Total income tax 
      (benefit) expense ...........   $   (182,331)   $2,579,241    $(1,269,052)
                                      ============    ==========    ===========
    
                                      F-11

<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)


     Income tax expense  applicable to  consolidated  income differs from income
tax expense  calculated by using the U.S. federal  statutory income tax rate for
the following reasons:

                                                Year Ended December 31,
                                      ------------------------------------------
                                         1995            1994           1993
                                      -----------     ----------    -----------
Income tax (benefit) expense 
  at U.S. federal statutory rate .... $(2,621,858)    $1,588,325    $(2,313,213)
Nondeductible expenses ..............     811,882        144,991        792,377
State and local taxes, net
  of U.S. federal tax benefit .......      50,106         66,264        147,708
International taxes .................     (15,904)       (22,931)      (308,959)
Change in valuation allowance .......     644,346         33,611        567,950
Write-off of prior year tax asset ...     505,864           --              --
Reserve for income tax 
  contingencies .....................     483,772        716,585       (125,600)
Other ...............................     (40,539)        52,396        (29,315)
                                      -----------     ----------    -----------
Income tax (benefit) expense ........ $  (182,331)    $2,579,241    $(1,269,052)
                                      ===========     ==========    ===========

     Temporary  differences  and  carryforwards  which give rise to net deferred
income tax assets and liabilities at December 31, 1995 and 1994 are as follows:

                                                Year Ended December 31,
                                            -------------------------------
                                                 1995             1994
                                            -------------     -------------
Deferred income tax assets:
   Deferred compensation .................  $     231,495     $     277,406
   Lease abandonment .....................        456,957           555,104
   Litigation accrual ....................      1,848,800              --
   Impairment write-down .................        185,345              --
   Amortization ..........................            --             27,714
   Allowances for doubtful accounts ......      1,049,852           402,242
   Other .................................         22,184             5,060
                                            -------------     -------------
                                                3,794,633         1,267,526
   Valuation allowance ...................     (1,245,908)         (601,562)
                                            -------------     -------------
                                                2,548,725           665,964
                                            -------------     -------------
Deferred income tax liabilities:
   Depreciation ..........................     (1,347,381)       (3,056,073)
   Amortization ..........................        (52,653)             --
                                            -------------     -------------
                                               (1,400,034)       (3,056,073)
                                            -------------     -------------
   Deferred tax asset (liability), net ...   $  1,148,691      $( 2,390,109)
                                            =============     =============

     No domestic income taxes have been provided on approximately $1,595,000 and
$719,000 of unremitted earnings of foreign subsidiaries at December 31, 1995 and
1994,  respectively,  since  such  earnings  have  been  or are  intended  to be
permanently  reinvested. It is not  practicable to determine the deferred income
tax liability for these earnings.

     Income taxes paid were approximately $1,177,000,  $1,708,000 and $2,473,000
for the years ended December 31, 1995, 1994 and 1993, respectively.

                                      F-12

<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

10. EMPLOYEE BENEFIT PLANS

     During 1995 the Company combined its profit sharing and 401(k) plans into a
single plan. The Company contribution to the 401(k) portion of the plan has been
increased  from $0.33 to $0.50 for every dollar of employee  contributions.  The
Company  will match up to 4% of the  employee's  base  salary.  The Company also
contributes,  at the  direction of the Board of  Directors,  a minimum of 20% of
pre-tax consolidated income. Plan expense for 1995 was $2,213,000.

     The  Company  previously  maintained  a profit  sharing  plan for  salaried
employees who had completed six months of service  without  incurring a one-year
interruption  in  employment.  The  plan  provided  for  contributions,  at  the
discretion  of  the  Board  of  Directors,  at  a  minimum  of  20%  of  pre-tax
consolidated  income.  Contributions  paid  to  the  profit  sharing  plan  were
allocated among participants on the basis of eligible  compensation paid. Profit
sharing expense was $1,250,000 and $1,100,000 in 1994 and 1993, respectively.

     The Company  previously also maintained a salary  reduction  profit sharing
plan under  Section  401(k) of the  Internal  Revenue  Code.  This plan  allowed
employees  to defer  compensation  through  contributions  to the  plan.  At the
discretion of the Board of Directors,  the Company  contributed  $0.33 for every
dollar of employee  contributions  up to a maximum of 2% of the employee's  base
salary. Plan expense was $610,000 and $565,000 in 1994 and 1993, respectively.

11. LEASE COMMITMENTS

     The  Company has  operating  leases for its office  facilities  and certain
equipment, which require minimum monthly rental payments and a pro-rata share of
common  operating  expenses for office  rentals.  Operating lease expense was as
follows:

                                                Year Ended December 31,
                                     ------------------------------------------
                                         1995           1994            1993
                                     ------------   ------------   ------------
Minimum lease expense .............. $  9,467,600   $  9,932,200   $ 10,530,100
Common operating lease expenses ....    1,297,700      1,578,200      2,517,900
                                     ------------   ------------   ------------
                                     $ 10,765,300   $ 11,510,400   $ 13,048,000
                                     ============   ============   ============

     Future  minimum lease payments for all  noncancelable  office and equipment
leases in effect at December 31, 1995 are as follows:

   Year Ending December 31,                                Rentals
   ------------------------                             ------------
            1996 .....................................   $ 8,659,000
            1997 .....................................     7,369,000
            1998 .....................................     4,779,000
            1999 .....................................     3,160,000
            2000 .....................................     1,849,000
            Thereafter ...............................     2,229,000
                                           

12. COMMITMENTS AND CONTINGENCIES

     Ketchum is the subject  of, or party to, a number of  lawsuits  and claims.
Included in other accrued  expenses is $4,961,434  and $200,000 for  outstanding
and settled litigation matters at December 31, 1995 and 1994,  respectively (see
Note 14). In the opinion of management,  any ultimate  liabilities  arising from
these  contingencies,  to the extent not provided  for, will not have a material
effect on the Company's financial position or results of operations.

                                      F-13
<PAGE>

             KETCHUM COMMUNICATIONS HOLDINGS, INC. AND SUBSIDIARIES

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

      Under the terms of prior agency  acquisition  and  investment  agreements,
additional  payments  may be  required,  contingent  upon  future  revenues  and
earnings of these agencies. Any additional payments are recorded as increases in
the  excess of cost over the fair value of net  assets  acquired  at the time in
which  such  payments  are  determined.   Additional   payments  on  prior  year
acquisitions  made  in 1995  and  1994  approximated  $342,000  and  $1,708,000,
respectively.

     In the event the Company is sold, the Company is obligated, under the terms
of agreements with certain parties who have sold shares of the Company's  common
stock to the Company  within the past five years,  to pay such parties an amount
based upon the difference  between the Company's  formula price per share at the
month end preceding the sale and the price  received for shares in a sale of the
Company.  The Company  estimates that the potential  settlement with parties who
may have claims  because they sold shares  within the previous  five years would
approximate $5 million in the event the merger with Omnicom is consummated  (see
Note 15).

     In  1995,  management  made a  decision  to  reorganize  its  media  buying
operations. A detailed plan has yet to be developed; however management believes
that any expenses to be incurred in connection with the reorganization  will not
have a material  effect on the Company's  financial  condition or the results of
its operations.

13. RESTRUCTURING CHARGES

     In 1993, the Company  developed a formal plan to  significantly  reduce the
Company's cost structure. The restructuring plan involved the sale or close-down
of certain operations.  A provision for the restructuring  charges of $8,778,572
was  recorded  in 1993 and  consists  primarily  of the  write-offs  of  certain
intangible  assets,  office  closing costs and employee  termination  costs.  At
December 31, 1995,  approximately  $821,000 remains in other liabilities related
to a lease abandonment which is expected to be paid out over a two year period.

14. OTHER EXPENSE


      Other expense is comprised of the following:

<TABLE>
<CAPTION>
                                                                             Year Ended December 31,
                                                                    ----------------------------------------
                                                                        1995           1994          1993
                                                                    ------------     --------    -----------
<S>                                                                  <C>             <C>         <C>     
Litigation matters (see below) ...................................   $ 4,961,434     $   --      $     --
Write-down of the excess of cost over the fair value of net
   assets acquired ...............................................     2,759,426         --          340,076
Write-off of notes receivable from equity investees ..............     1,118,051         --          893,870
Write-off of equity investment ...................................         --            --          714,465
Equity in net loss of equity investees ...........................       723,273       252,834        10,521
                                                                     -----------     ---------   -----------
                                                                     $ 9,562,184     $ 252,834   $ 1,958,932
                                                                     ===========     =========   =========== 
</TABLE>

     Included in  litigation  matters in 1995 is  $3,540,000  with  respect to a
judgement  received  against the Company  related to a prior  acquisition in the
United  Kingdom.  Such judgement  amount and  approximately  $450,000 of related
legal fees due to the plantiff are  currently  payable and are included in other
accrued expenses at December 31, 1995 (see Note 12).

15. SUBSEQUENT EVENT

     During  1996  Ketchum  has  entered  into  negotiations  for a merger  with
Omnicom.  The terms of the merger agreement being discussed  provide for Omnicom
to  acquire  all of the  outstanding  common and  preferred  stock of Ketchum in
exchange for common  shares of Omnicom as based upon the market value of Omnicom
common  shares  and the  "Common  Stock  Conversion  Price"  for the  common and
preferred  stock of Ketchum at the merger  date,  as defined in the draft merger
agreement.

                                      F-14
<PAGE>

                                     ANNEX I

                      PENNSYLVANIA BUSINESS CORPORATION LAW

                         Subchapter D. Dissenters Rights

     1571 APPLICATION AND EFFECT OF  SUBCHAPTER.--(a)  General rule.-- Except as
otherwise provided in subsection (b), any shareholder of a business  corporation
shall have the right to dissent from, and to obtain payment of the fair value of
his shares in the event of, any corporate  action,  or to otherwise  obtain fair
value for his shares,  where this part  expressly  provides  that a  shareholder
shall have the rights and remedies provided in this subchapter. See:

     Section 1906(c) (relating to dissenters rights upon special treatment).

     Section 1930 (relating to dissenters rights).

     Section 1931(d) (relating to dissenters rights in share exchanges).

     Section 1932(c) (relating to dissenters rights in asset transfers).

     Section 1952(d) (relating to dissenters rights in division).

     Section 1962(c) (relating to dissenters rights in conversion).

     Section 2104(b) (relating to procedure).

     Section  2324  (relating  to  corporation  option  where a  restriction  on
transfer of a security is held invalid).

     Section 2325(b) (relating to minimum vote requirement).

     Section 2704(c) (relating to dissenters rights upon election).

     Section 2705(d) (relating to dissenters rights upon renewal of election).

     Section 2907(a)  (relating to proceedings to terminate breach of qualifying
conditions).

     Section 7104(b)(3) (relating to procedure).

     (b)  Exceptions.--(1)  Except as otherwise  provided in paragraph  (2), the
holders of the shares of any class or series of shares that,  at the record date
fixed to  determine  the  shareholders  entitled to notice of and to vote at the
meeting at which a plan  specified in any of section 1930,  1931(d),  1932(c) or
1952(d) is to be voted on, are either:

     (i) listed on a national securities exchange; or

     (ii) held of record by more than 2,000 shareholders;

     shall not have the right to obtain  payment  of the fair  value of any such
shares under this subchapter.

     (2)  Paragraph  (1)  shall  not  apply to and  dissenters  rights  shall be
available without regard to the exception provided in that paragraph in the case
of:

     (i) Shares  converted by a plan if the shares are not converted solely into
shares of the acquiring, surviving, new or other corporation or solely into such
shares and money in lieu of fractional shares.

     (ii) Shares of any preferred or special class unless the articles, the plan
or the terms of the  transaction  entitle all  shareholders of the class to vote
thereon  and require for the  adoption  of the plan or the  effectuation  of the
transaction  the  affirmative  vote  of a  majority  of the  votes  cast  by all
shareholders of the class.

     (iii) Shares entitled to dissenters  rights under section 1906(c) (relating
to  dissenters  rights  upon  special  treatment).  

     (3) The  shareholders  of a corporation  that acquires by purchase,  lease,
exchange or other disposition all or substantially  all of the shares,  property
or assets of  another  corporation  by the  issuance  of shares  obligations  or
otherwise, with or without assuming the liabilities of the other corporation and

                                      A-1
<PAGE>

with or without the intervention of another  corporation or other person,  shall
not be entitled to the rights and remedies of dissenting  shareholders  provided
in  this  subchapter  regardless  of the  fact,  if it be  the  case,  that  the
acquisition was accomplished by the issuance of voting shares of the corporation
to be  outstanding  immediately  after  the  acquisition  sufficient  to elect a
majority or more of the directors of the corporation.

     (c) Grant of optional dissenters rights.--The bylaws or a resolution of the
board of directors may direct that all or a part of the shareholders  shall have
dissenters  rights in connection with any corporate action or other  transaction
that would otherwise not entitle such shareholder to dissenters rights.

     (d) Notice of dissenters  rights.--Unless otherwise provided by statute, if
a proposed corporate action that would give rise to dissenters rights under this
subpart is  submitted  to a vote at a meeting of  shareholders,  there  shall be
included in or enclosed with the notice of meeting:

     (1)  A  statement  of  the  proposed   action  and  a  statement  that  the
shareholders  have a right to dissent  and  obtain  payment of the fair value of
their shares by complying with the terms of this subchapter; and

     (2) A copy of this subchapter.

     (e)  Other  statutes.--The  procedures  of this  subchapter  shall  also be
applicable to any transaction described in any statute other than this part that
makes  reference  to this  subchapter  for the  purpose of  granting  dissenters
rights.

     (f) Certain provisions of articles ineffective.--This subchapter may not be
relaxed by any provision of the articles.

     (g) Cross  references.--See  sections  1105  (relating  to  restriction  on
equitable relief),  1904 (relating to de facto transaction  doctrine  abolished)
and 2512 (relating to dissenters rights procedure). (Last amended by Act 198, L.
'90, eff. 12-19-90.)

     1572  DEFINITIONS.  The  following  words  and  phrases  when  used in this
subchapter  shall have the  meanings  given to them in this  section  unless the
context clearly indicates otherwise:

     "Corporation."  The  issuer of the  shares  held or owned by the  dissenter
before the corporate action or the successor by merger, consolidation,  division
conversion or otherwise of that issuer.  A plan of division may designate  which
of the resulting  corporations is the successor  corporation for the purposes of
this  subchapter.  The  successor  corporation  in a  division  shall  have sole
responsibility  for  payments to  dissenters  and other  liabilities  under this
subchapter except as otherwise provided in the plan of division.

     "Dissenter." A shareholder or beneficial  owner who is entitled to and does
assert  dissenters  rights under this subchapter and who has performed every act
required up to the time involved for the assertion of those rights.

     "Fair value." The fair value of shares  immediately before the effectuation
of the corporate  action to which the dissenter  objects taking into account all
relevant factors, but excluding any appreciation or depreciation in anticipation
of the corporate action.

     "Interest."  Interest from the effective date of the corporate action until
the  date of  payment  at  such  rate as is fair  and  equitable  under  all the
circumstances,  taking into account all relevant  factors  including the average
rate  currently  paid by the  corporation  on its  principal  bank loans.  (Last
amended by Act 198, L. '90, eff. 12-19-90.)

     1573 RECORD AND  BENEFICIAL  HOLDERS  AND  OWNERS.--(a)  Record  holders of
shares.--A  record  holder  of  shares  of a  business  corporation  may  assert
dissenters rights as to fewer than all of the shares registered in his name only
if he  dissents  with  respect  to all the  shares  of the same  class or series
beneficially  owned by any one person and  discloses the name and address of the
person or persons on whose behalf he dissents.  In that event,  his rights shall
be determined as if the shares as to which he has dissented and his other shares
were registered in the names of different shareholders.

     (b)  Beneficial  owners  of  shares.--A  beneficial  owner of  shares  of a
business  corporation who is not the record holder may assert  dissenters rights
with  respect to shares held on his behalf and shall be treated as a  dissenting
shareholder  under the terms of this subchapter if he submits to the corporation
not later than the time of the assertion of dissenters  rights a written consent

                                      A-2
<PAGE>

of the record  holder.  A beneficial  owner may not dissent with respect to some
but less than all shares of the same class or series owned by the owner, whether
or not the shares so owned by him are  registered in his name.  (Last amended by
Act 169, L. '92, eff. 2-16-93.)

     1574 NOTICE OF INTENTION TO DISSENT.--If  the proposed  corporate action is
submitted to a vote at a meeting of shareholders of a business corporation,  any
person who wishes to dissent and obtain  payment of the fair value of his shares
must file with the corporation, prior to the vote, a written notice of intention
to demand that he be paid the fair value for his shares if the  proposed  action
is effectuated,  must effect no change in the beneficial ownership of his shares
from the date of such  filing  continuously  through the  effective  date of the
proposed  action and must  refrain  from  voting his shares in  approval of such
action.  A  dissenter  who fails in any  respect  shall not acquire any right to
payment of the fair value of his shares under this  subchapter.  Neither a proxy
nor a vote against the proposed  corporate  action shall  constitute the written
notice required by this section.

     1575  NOTICE  TO DEMAND  PAYMENT.  --(a)  General  rule.--If  the  proposed
corporate  action is approved by the required vote at a meeting of  shareholders
of a business  corporation,  the corporation  shall mail a further notice to all
dissenters  who gave due notice of intention to demand payment of the fair value
of their shares and who refrained  from voting in favor of the proposed  action.
If the proposed  corporate action is to be taken without a vote of shareholders,
the corporation  shall send to all  shareholders who are entitled to dissent and
demand payment of the fair value of their shares a notice of the adoption of the
plan or other corporate action. In either case, the notice shall:

     (1) State where and when a demand for payment must be sent and certificates
for certificated shares must be deposited in order to obtain payment.

     (2) Inform  holders of  uncertificated  shares to what  extent  transfer of
shares will be restricted from the time that demand for payment is received.

     (3)  Supply a form for  demanding  payment  that  includes  a  request  for
certification  of the date on which  the  shareholder,  or the  person  on whose
behalf the shareholder dissents, acquired beneficial ownership of the shares.

     (4) Be accompanied by a copy of this subchapter.

     (5) Time for  receipt of demand for  payment.--The  time set for receipt of
the demand and  deposit of  certificated  shares  shall be not less than 30 days
from the mailing of the notice.

      1576 FAILURE TO COMPLY WITH NOTICE TO DEMAND PAYMENT, ETC. --(a) Effect of
failure  of  shareholder  to  act.--A  shareholder  who fails to  timely  demand
payment,  or fails  (in the  case of  certificated  shares)  to  timely  deposit
certificates,  as required by a notice  pursuant to section  1575  (relating  to
notice to demand  payment)  shall not have any right  under this  subchapter  to
receive payment of the fair value of his shares.

     (b)   Restriction  on   uncertificated   shares.--If  the  shares  are  not
represented  by  certificates,  the  business  corporation  may  restrict  their
transfer  from the time of receipt of demand for payment until  effectuation  of
the proposed  corporate action or the release of restrictions under the terms of
section 1577(B) (relating to failure to effectuate corporate action).

     (c) Rights retained by  shareholder.--The  dissenter shall retain all other
rights of a shareholder  until those rights are modified by  effectuation of the
proposed corporate action. (Last amended by Act 198, L. '90, eff. 12-19-90.)

     1577  RELEASE OF  RESTRICTIONS  OR PAYMENT  FOR  SHARES.  --(a)  Failure to
effectuate  corporate  action.--Within  60 days after the date set for demanding
payment  and  depositing  certificates,  if the  business  corporation  has  not
effectuated the proposed corporate action, it shall return any certificates that
have  been  deposited  and  release  uncertificated  shares  from  any  transfer
restrictions imposed by reason of the demand for payment.

                                      A-3
<PAGE>

     (b) Renewal of notice to demand  payment.--When  uncertificated shares have
been released from transfer  restrictions and deposited  certificates  have been
returned,  the corporation may at any later time send a new notice conforming to
the  requirements of section 1575 (relating to notice to demand  payment),  with
like effect.

     (c) Payment of fair value of  shares.--Promptly  after  effectuation of the
proposed  corporate  action, or upon timely receipt of demand for payment if the
corporate  action has already been  effectuated,  the  corporation  shall either
remit to dissenters who have made demand and (if their shares are  certificated)
have deposited their  certificates the amount that the corporation  estimates to
be the fair value of the shares, or give written notice that no remittance under
this section will be made. The remittance or notice shall be accompanied by:

     (1) The closing  balance sheet and statement of income of the issuer of the
shares held or owned by the  dissenter for a fiscal year ending not more than 16
months  before  the date of  remittance  or  notice  together  with  the  latest
available interim financial statements.

     (2) A  statement  of the  corporation's  estimate  of the fair value of the
shares.

     (3)  A  notice  of  the  right  of  the  dissenter  to  demand  payment  or
supplemental  payment,  as the  case  may  be,  accompanied  by a copy  of  this
subchapter.

     (d) Failure to make  payment.--If the corporation does not remit the amount
of its estimate of the fair value of the shares as provided by  subsection  (c),
it  shall  return  any  certificates   that  have  been  deposited  and  release
uncertificated  shares from any transfer  restrictions  imposed by reason of the
demand for payment.  The corporation may make a notation on any such certificate
or on the records of the corporation relating to any such uncertificated  shares
that such demand has been made.  If shares with  respect to which  notation  has
been so made shall be transferred,  each new certificate  issued therefor or the
records relating to any transferred  uncertificated  shares shall bear a similar
notation,  together with the name of the original  dissenting holder or owner of
such shares.  A transferee of such shares shall not acquire by such transfer any
rights in the  corporation  other than those that the  original  dissenters  had
after making  demand for payment of their fair value.  (Last amended by Act 198,
L. '90, eff. 12-19-90.)

     1578 ESTIMATE BY DISSENTER OF FAIR VALUE OF SHARES. --(a) General rule.--If
the business  corporation  gives notice of its estimate of the fair value of the
shares,  without remitting such amount, or remits payment of its estimate of the
fair value of a dissenter's  shares as permitted by section l577(c) (relating to
payment of fair  value of shares)  and the  dissenter  believes  that the amount
stated or remitted is less than the fair value of his shares, he may send to the
corporation  his own  estimate of the fair value of the  shares,  which shall be
deemed a demand for payment of the amount or the deficiency.

     (b) Effect of failure to file  estimate.--Where the dissenter does not file
his own estimate  under  subsection  (a) within 30 days after the mailing by the
corporation of its remittance or notice,  the dissenter  shall be entitled to no
more than the amount stated in the notice or remitted to him by the corporation.
(Last amended by Act 198, L, '90, eff. 12-19-90.)

     1579 VALUATION  PROCEEDINGS  GENERALLY.--(a)  General rule.--Within 60 days
after the latest of:

     (1) Effectuation of the proposed corporate action;

     (2) Timely  receipt of any demands for payment under section 1575 (relating
to notice to demand payment); or

     (3) Timely  receipt of any estimates  pursuant to section 1578 (relating to
estimate by dissenter of fair value of shares);

     If any demands for payment remain unsettled,  the business  corporation may
file in court an application  for relief  requesting  that the fair value of the
shares be determined by the court.

     (b) Mandatory joinder of  dissenters.--All  dissenters,  wherever residing,
whose demands have not been settled  shall be made parties to the  proceeding as
in an action against their shares. A copy of the application  shall be served on
each such dissenter. If a dissenter is a nonresident,  the copy may be served on
him in the manner  provided or  prescribed  by or pursuant to 42 Pa.C.S.  Ch. 53
(relating to bases of jurisdiction and interstate and international procedure).

                                      A-4
<PAGE>

      (c)  Jurisdiction  of the  court.--The  jurisdiction of the court shall be
plenary and  exclusive.  The court may appoint an appraiser to receive  evidence
and recommend a decision on the issue of fair value.  The  appraiser  shall have
such power and authority as may be specified in the order of  appointment  or in
any amendment thereof.

      (d)  Measure of  recovery.--Each  dissenter  who is made a party  shall be
entitled to recover the amount by which the fair value of his shares is found to
exceed the amount, if any, previously remitted, plus interest.

      (e)  Effect  of  corporation's   failure  to  file   application.--If  the
corporation  fails to file an  application  as provided in  subsection  (a), any
dissenter  who made a demand and who has not already  settled his claim  against
the  corporation  may do so in the name of the corporation at any time within 30
days after the expiration of the 60-day period.  If a dissenter does not file an
application  within  the  30-day  period,  each  dissenter  entitled  to file an
application  shall, be paid the corporation's  estimate of the fair value of the
shares and no more, and may bring an action to recover any amount not previously
remitted.

     1580 COSTS AND EXPENSES OF VALUATION  PROCEEDINGS.--(a)  General rule.--The
costs and expenses of any  proceeding  under section 1579 (relating to valuation
proceedings  generally),  including the reasonable  compensation and expenses of
the  appraiser  appointed  by the court,  shall be  determined  by the court and
assessed against the business  corporation except that any part of the costs and
expenses may be apportioned and assessed as the court deems appropriate  against
all or some of the  dissenters  who are  parties and whose  action in  demanding
supplemental  payment under  section 1578  (relating to estimate by dissenter of
fair value of  shares)  the court  finds to be  dilatory,  obdurate,  arbitrary,
vexatious or in bad faith.

     (b)  Assessment  of counsel  fees and expert  fees where lack of good faith
appears.--  Fees and  expenses  of  counsel  and of experts  for the  respective
parties may be assessed as the court deems  appropriate  against the corporation
and in  favor of any or all  dissenters  if the  corporation  failed  to  comply
substantially  with the  requirements  of this  subchapter  and may be  assessed
against either the  corporation or a dissenter,  in favor of any other party, if
the court finds that the party  against  whom the fees and expenses are assessed
acted in bad faith or in a dilatory,  obdurate, arbitrary or vexatious manner in
respect to the rights provided by this subchapter.

     (c) Award of fees for  benefits  to other  dissenters.--If  the court finds
that the services of counsel for any dissenter  were of  substantial  benefit to
other  dissenters  similarly  situated  and should not be  assessed  against the
corporation, it may award to those counsel reasonable fees to be paid out of the
amounts awarded to the dissenters who were benefited.


                                       A-5

<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

Item 20.   Indemnification of Directors and Officers

     The Registrant's Certificate of Incorporation contains a provision limiting
the  liability  of  directors  (except  for  approving  statutorily   prohibited
dividends,  share  repurchases  or  redemptions,   distributions  of  assets  on
dissolution or loans to directors) to acts or omissions in bad faith,  involving
intentional  misconduct  or a knowing  violation  of the law,  or  resulting  in
personal gain to which the director was not legally  entitled.  The Registrant's
By-Laws  provide  that an officer or director  will be  indemnified  against any
costs or  liabilities,  including  attorneys fees and amounts paid in settlement
with the  consent of the  registrant  in  connection  with any claim,  action or
proceeding to the fullest extent permitted by the New York Business  Corporation
Law.

      Section  722(a) of the New York Business  Corporation  Law provides that a
corporation  may  indemnify  any officer or director,  made or  threatened to be
made, a party to an action other than one by or in the right of the corporation,
including  an  action  by or in the  right  of any  other  corporation  or other
enterprise,  which any  director  or  officer of the  corporation  served in any
capacity at the request of the corporation, because he was a director or officer
of the corporation,  or served such other corporation or other enterprise in any
capacity,  against judgments,  fines,  amounts paid in settlement and reasonable
expenses,  including  attorneys'  fees  actually and  necessarily  incurred as a
result of such action, or any appeal therein, if such director or officer acted,
in good faith,  for a purpose which he  reasonably  believed to be in, or in the
case of service for any other corporation or other  enterprise,  not opposed to,
the best interests of the corporation and, in criminal actions, in addition, had
no reasonable cause to believe that his conduct was unlawful.

     Section  722(c) of the New York  Business  Corporation  Law provides that a
corporation  may  indemnify  any officer or director  made,  or threatened to be
made,  a party to an action by or in the right of the  corporation  by reason of
the fact that he is or was a director of the  corporation,  or is or was serving
at the  request  of the  corporation  as a  director  of  officer  of any  other
corporation of any type or kind, or other  enterprise,  against  amounts paid in
settlement  and  reasonable  expenses,  including  attorneys'  fees actually and
necessarily incurred by him in connection with the defense or settlement of such
action,  or in connection  with an appeal  therein,  if such director or officer
acted, in good faith,  for a purpose which he reasonably  believed to be in, or,
in the case of service for another corporation or other enterprise,  not opposed
to, the best interests of the  corporation.  The corporation  may not,  however,
indemnify any officer or director pursuant to Section 722(c) in respect of (1) a
threatened  action,  or a pending action which is settled or otherwise  disposed
of, or (2) any claim,  issue or matter as to which such  person  shall have been
adjudged to be liable to the corporation, unless and only to the extent that the
court in which the action was brought or, if no action was brought, any court of
competent jurisdiction,  determines in its discretion, that the person is fairly
and  reasonably  entitled to indemnity  for such portion of the  settlement  and
expenses as the court deems proper.

     Section  723 of the New York  Business  Corporation  Law  provides  that an
officer or director  who has been  successful  on the merits or otherwise in the
defense of a civil or criminal  action of the character set forth in Section 722
is entitled to indemnification as permitted in such section.  Section 724 of the
New York Business  Corporation Law permits a court to award the  indemnification
required by Section 722.

     The Registrant has entered into  agreements with its directors to indemnify
them for  liabilities  or costs  arising out of any alleged or actual  breach of
duty, neglect,  errors or omissions while serving as a director.  The Registrant
also  maintains  and  pays  premiums  for  directors'  and  officers'  liability
insurance policies.

Item 21.  Exhibits and Financial Statement Schedules.

     (a) See Exhibit Index

     (b) See the  financial  statement  schedules  included in Omnicom's  Annual
Report on Form 10-K for the year ended  December  31, 1994  incorporated  in the
Prospectus/Information Statement included in this Registration Statement.

                                      II-1
<PAGE>

Item 22.   Undertakings.

     (a) The undersigned  Registrant  hereby undertakes that, for the purpose of
determining  any liability  under the Securities Act of 1933, each filing of the
Registrant's  annual  report  pursuant  to Section  13 or  Section  15(d) of the
Securities  Exchange  Act of 1934  that is  incorporated  by  reference  in this
Registration  Statement  shall  be  deemed  to be a new  registration  statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

     (b) The undersigned  Registrant hereby undertakes as follows: that prior to
any public  reoffering of the securities  registered  hereunder through use of a
prospectus  which is a part of this  registration  statement,  by any  person or
party who is deemed to be an underwriter within the meaning of Rule 145(c) under
the Securities Act, the issuer  undertakes that such reoffering  prospectus will
contain the  information  called for by the  applicable  registration  form with
respect to reofferings by persons who may be deemed underwriters, in addition to
the information called for by the other Items of the applicable form.

     (c) The Registrant  undertakes that every  prospectus that purports to meet
the  requirements  of  Section  10(a)(3)  of the  Securities  Act and is used in
connection  with an  offering  of  securities  subject  to Rule  415  under  the
Securities  Act,  will be filed as a part of an  amendment  to the  registration
statement and will not be used until such amendment is effective,  and that, for
purposes of determining  any liability  under the  Securities Act of 1933,  each
such post-effective amendment shall be deemed to be a new registration statement
relating to the securities offered therein,  and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

     (d) Insofar as indemnification for liabilities arising under the Securities
Act of 1933 may be permitted to directors,  officers or persons  controlling the
Registrant pursuant to the foregoing  provisions,  or otherwise,  the Registrant
has been advised that in the opinion of the Securities  and Exchange  Commission
such  indemnification  is against  public policy as expressed in the Act and is,
therefore,  unenforceable. In the event that a claim for indemnification against
such liabilities  (other than the payment by the Registrant of expenses incurred
or paid by a director,  officer or  controlling  person of the Registrant in the
successful  defense of any  action,  suit or  proceeding)  is  asserted  by such
director,  officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

     (e) The undersigned Registrant hereby undertakes to respond to requests for
information  that is incorporated  by reference into the  Prospectus/Information
Statement pursuant to Items 4, 10(b), 11 or 13 of this Form, within one business
day of receipt of such requests, and to send the incorporated documents by first
class mail or other equally prompt means. This includes information contained in
documents filed subsequent to the effective date of the  Registration  Statement
through the date of the responding to the request.

     (f) The undersigned  Registrant  hereby  undertakes to supply by means of a
post-effective  amendment  all  information  concerning a  transaction,  and the
company  being  acquired  involved  therein,  that  was not the  subject  of and
included in the Registration Statement when it became effective.

                                      II-2
<PAGE>

                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the Registrant
has duly caused this  Registration  Statement  to be signed on its behalf by the
undersigned,  thereunto duly  authorized,  in the City of New York, State of New
York, on March 8, 1996.

                                             OMNICOM GROUP INC.
                                             Registrant

                                             By:  /s/ JOHN D. WREN
                                                  -----------------------
                                                      John D. Wren
                                                      President


                                POWER OF ATTORNEY

     KNOW ALL MEN BY THESE  PRESENTS,  that each  officer or director of Omnicom
Group Inc. whose signature appears below constitutes and appoints Bruce Crawford
and Barry J. Wagner, and each of them, his true and lawful  attorney-in-fact and
agent, with full and several power of substitution and  resubstitution,  for him
and in his name, place and stead, in any and all capacities,  to sign any or all
amendments,  to this  Registration  Statement,  and to file the  same,  with all
exhibits  thereto,  and  other  documents  in  connection  therewith,  with  the
Securities and Exchange  Commission,  granting unto said  attorneys-in-fact  and
agent full power and  authority  to do and perform  each and every act and thing
requisite and  necessary to be done in and about the  premises,  as fully to all
intents and purposes as they or he might or could do in person, hereby ratifying
and confirming all that said  attorneys-in-fact  and agents or his substitute or
substitutes, may lawfully do or cause to be done by virtue hereof.

                                      II-3
<PAGE>

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
Registration  Statement  has been signed below by the  following  persons in the
capacities and on the dates indicated:

<TABLE>
<CAPTION>

         Signature                           Title                         Date
         ---------                           -----                         ----
         
<S>                              <C>                                    <C>
    /S/ BRUCE CRAWFORD           Chairman, Chief Executive Officer      March 8, 1996
- -----------------------------      and Director (Principal
        Bruce Crawford             Executive Officer) 
                                    

    /S/ FRED J. MEYER            Chief Financial Officer and            March 8, 1996
- -----------------------------      Director (Principal Financial
        Fred J. Meyer              Officer) 
                            

    /S/ DALE A. ADAMS            Controller (Principal Accounting       March 8, 1996
- -----------------------------      Officer)
        Dale A. Adams        

  /S/ BERNARD BROCHAND           Director                               March 8, 1996
- -----------------------------
      Bernard Brochand

  /S/ ROBERT J. CALLANDER        Director                               March 8, 1996
- -----------------------------
       Robert J. Callander

   /S/ JAMES A. CANNON           Director                               March 8, 1996
- -----------------------------
       James A. Cannon

 /S/ LEONARD S. COLEMAN, JR.     Director                               March 8, 1996
- -----------------------------
     Leonard S. Coleman, Jr.

     /S/ PETER I. JONES          Director                               March 8, 1996
- -----------------------------
       Peter I. Jones

     /S/ JOHN R. PURCELL         Director                               March 8, 1996
- -----------------------------
        John R. Purcell

    /S/ KEITH L. REINHARD        Director                               March 8, 1996
- -----------------------------
        Keith L. Reinhard

    /S/ ALLEN ROSENSHINE         Director                               March 8, 1996
- ----------------------------- 
        Allen Rosenshine

     /S/ GARY L. ROUBOS          Director                               March 8, 1996
- -----------------------------
         Gary L. Roubos

  /S/ QUENTIN I. SMITH, JR.      Director                               March 8, 1996
- -----------------------------
      Quentin I. Smith, Jr.

     /S/ ROBIN B. SMITH          Director                               March 8, 1996
- -----------------------------
         Robin B. Smith

    /S/ WILLIAM G. TRAGOS        Director                               March 8, 1996
- -----------------------------
        William G. Tragos

      /S/ JOHN D. WREN           Director                               March 8, 1996
- -----------------------------
          John D. Wren

    /S/ EGON P.S. ZEHNDER        Director                               March 8, 1996
- -----------------------------
        Egon P.S. Zehnder
</TABLE>

                                      II-4


                          AGREEMENT AND PLAN OF MERGER
                                  by and among
                               OMNICOM GROUP INC.,
                              KCI ACQUISITION INC.
                                       and
                      KETCHUM COMMUNICATIONS HOLDINGS, INC.

                              Dated March 7, 1996


<PAGE>

                                TABLE OF CONTENTS

                                    ARTICLE I
                                   THE MERGER

Section   1.1       The Merger...............................................  1
Section   1.2       Effective Time...........................................  2
Section   1.3       Articles of Incorporation and By-Laws of the 
                    Surviving Corporation....................................  2
          1.3.1     Articles of Incorporation................................  2
          1.3.2     By-Laws                                                    2
Section   1.4       Directors and Officers of the Surviving Corporation......  2
          1.4.1     Directors of the Surviving Corporation...................  2
          1.4.2     Officers of the Surviving Corporation....................  2

                                   ARTICLE II
                              CONVERSION OF SHARES

Section   2.1       Conversion of Capital Stock..............................  2
          2.1.1     Conversion Prices; Market Value..........................  2
          2.1.2     Conversion of Capital Stock..............................  3
Section   2.2       Surrender of Company Stock and Issuance of 
                    Omnicom Stock............................................  4
Section   2.3       No Fractional Shares.....................................  5
Section   2.4       Dividends................................................  5
Section   2.5       Certificates in Shareholder's Name.......................  5
Section   2.6       Closing..................................................  5
Section   2.7       Escrow Agreement.........................................  6

                                   ARTICLE III
                         REPRESENTATIONS OF THE COMPANY

Section   3.1       Execution and Validity of Agreement......................  6
Section   3.2       Capitalization, Existence and Good Standing of 
                    the Company..............................................  7
          3.2.1     Capitalization ..........................................  7
          3.2.2     Existence and Good Standing..............................  7
Section   3.3       Subsidiaries and Investments.............................  7
Section   3.4       Financial Statements and No Material Changes.............  8
Section   3.5       Books and Records........................................  9
Section   3.6       Title to Properties; Encumbrances........................  9
Section   3.7       Owned and Leased Real Property and Leased 
                    Personal Property........................................  9
          3.7.1     Real Property and Personal Property Leases...............  9
          3.7.2     Owned Real Property...................................... 10
          3.7.3     Environmental Matters.................................... 11
Section   3.8       Contracts................................................ 11
Section   3.9       Non-Contravention; Approvals and Consents................ 12
          3.9.1     Non-Contravention........................................ 12
          3.9.2     Approvals and Consents................................... 13
Section   3.10      Litigation............................................... 13
Section   3.11      Taxes.................................................... 14
          3.11.1    Taxes ................................................... 14

                                       i
<PAGE>

Section   3.12      Liabilities.............................................. 15
Section   3.13      Insurance................................................ 15
Section   3.14      Intellectual Properties.................................. 15
Section   3.15      Compliance with Laws; Licenses and Permits............... 16
          3.15.1    Compliance .............................................. 16
          3.15.2    Licenses ................................................ 16
Section   3.16      Client Relations......................................... 16
Section   3.17      Accounts Receivable; Work-in-Process; 
                    Accounts Payable......................................... 16
Section   3.18      Employment Relations..................................... 17
Section   3.19      Employee Benefit Matters................................. 18
          3.19.1    List of Plans ........................................... 18
          3.19.2    Multi-Employer Plans..................................... 18
          3.19.3    Severance ............................................... 19
          3.19.4    Welfare Benefit Plans.................................... 19
          3.19.5    Administrative Compliance................................ 19
          3.19.6    Tax-Qualification........................................ 19
          3.19.7    Funding; Excise Taxes.................................... 20
          3.19.8    Tax Deductions .......................................... 20
Section   3.20      Interests in Customers, Suppliers, Etc................... 20
Section   3.21      Bank Accounts and Powers of Attorney..................... 21
Section   3.22      Compensation of Employees................................ 21
Section   3.23      No Changes Since the Balance Sheet Date.................. 21
Section   3.24      Vote Required............................................ 22
Section   3.25      Corporate Controls....................................... 22
Section   3.26      Information Supplied..................................... 22
Section   3.27      Brokers.................................................. 23
Section   3.28      Transaction Costs........................................ 23
Section   3.29      Accounting Matters....................................... 23
Section   3.30      Copies of Documents; Schedules........................... 23

                                   ARTICLE IV
                     REPRESENTATIONS OF OMNICOM AND OMNISUB

Section   4.1       Existence and Good Standing.............................. 23
Section   4.2       Execution and Validity of Agreements..................... 24
Section   4.3       Non-Contravention; Approvals and Consents................ 24
          4.3.1     Non-Contravention........................................ 24
          4.3.2     Approvals and Consents................................... 24
Section   4.4       Omnicom Stock............................................ 24
Section   4.5       Financial Statements and No Material Changes............. 25
Section   4.6       Litigation............................................... 25
Section   4.7       Brokers.................................................. 25
Section   4.8       Information Supplied..................................... 25
Section   4.9       OmniSub.................................................. 26
Section   4.10      Copies of Documents; Schedules........................... 26

                                       ii
<PAGE>

                                    ARTICLE V
                            COVENANTS OF THE COMPANY

Section   5.1       Regulatory and Other Approvals........................... 26
Section   5.2       HSR Filings.............................................. 27
Section   5.3       Full Access.............................................. 27
Section   5.4       No Solicitations......................................... 27
Section   5.5       Conduct of Business...................................... 27
Section   5.6       Financial Information.................................... 29
Section   5.7       Notice and Cure.......................................... 30
Section   5.8       Consultation............................................. 30
Section   5.9       Company Shareholders' Approval........................... 30
Section   5.10      Tax Returns.............................................. 31
Section   5.11      Fulfillment of Conditions................................ 31
Section   5.12      Repayment of Indebtedness................................ 31
Section   5.13      Tax Opinion.............................................. 31
Section   5.14      Amendment of Profit Sharing Plan......................... 31

                                   ARTICLE VI
                        COVENANTS OF OMNICOM AND OMNISUB

Section   6.1       Regulatory and Other Approvals........................... 32
Section   6.2       HSR Filings.............................................. 32
Section   6.3       Financial Information and Reports........................ 32
Section   6.4       Notice and Cure.......................................... 32
Section   6.5       Fulfillment of Conditions................................ 33
Section   6.6       Blue Sky; New York Stock Exchange Listing................ 33
Section   6.7       Exchange Act Filings..................................... 33
Section   6.8       Indemnification of Directors and Officers................ 33

                                   ARTICLE VII
                                MUTUAL COVENANTS

Section   7.1       Preparation of Registration Statement.................... 34
Section   7.2       Affiliates Representation Letters........................ 34
Section   7.3       Reasonable Efforts to Consummate Transaction............. 34
Section   7.4       Public Announcements..................................... 34
Section   7.5       Transfer Tax Compliance.................................. 35

                                  ARTICLE VIII
                CONDITIONS TO OBLIGATIONS OF OMNICOM AND OMNISUB

Section   8.1       Representations and Warranties........................... 35
Section   8.2       Good Standing Certificates............................... 35
Section   8.3       Performance.............................................. 35
Section   8.4       Certified Resolutions.................................... 36
Section   8.5       Registration Statement; New York Stock 
                    Exchange Listing......................................... 36
Section   8.6       Company Shareholders' Approval and 
                    Dissenters' Rights....................................... 36
Section   8.7       No Injunctions or Restraints............................. 36
Section   8.8       Regulatory Consents and Approvals........................ 36
Section   8.9       Required Approvals, Notices and Consents................. 36
Section   8.10      Pooling of Interests Accounting.......................... 36

                                      iii
<PAGE>

Section   8.11      Opinion of Counsel....................................... 37
Section   8.12      Escrow Agreement......................................... 37
Section   8.13      Employment Agreements.................................... 37
Section   8.14      Non-Competition Agreements............................... 37
Section   8.15      Affiliates Representation Letters........................ 37
Section   8.16      Material Adverse Effect.................................. 37
Section   8.17      Proceedings.............................................. 37
Section   8.18      No Withholding Certificate............................... 37
Section   8.19      Tax Opinion.............................................. 44
Section   8.20      Waivers.................................................. 37

                                   ARTICLE IX
                    CONDITIONS TO OBLIGATIONS OF THE COMPANY

Section   9.1       Representations and Warranties........................... 38
Section   9.2       Good Standing Certificates............................... 38
Section   9.3       Performance.............................................. 38
Section   9.4       Certified Resolutions.................................... 38
Section   9.5       Registration Statement, New York Stock 
                    Exchange Listing......................................... 38
Section   9.6       Company Shareholders' Approval........................... 38
Section   9.7       No Injunctions or Restraints............................. 38
Section   9.8       Regulatory Consents and Approvals........................ 39
Section   9.9       Opinion of Counsel....................................... 39
Section   9.10      Escrow Agreement......................................... 39
Section   9.11      Material Adverse Effect.................................. 39
Section   9.12      Proceedings.............................................. 39
Section   9.13      Tax Opinion.............................................. 39

                                    ARTICLE X
                              ADDITIONAL AGREEMENTS

Section   10.1      Termination.............................................. 39
Section   10.2      Effect of Termination.................................... 40

                                   ARTICLE XI
                            SURVIVAL; INDEMNIFICATION

Section   11.1      Survival................................................. 40
Section   11.2      Obligation to Indemnify.................................. 41
Section   11.3      Indemnification Procedures............................... 41
          11.3.1    Notice of Asserted Liability............................. 41
          11.3.2    Defense of Asserted Liability............................ 41
          11.3.3    Cooperation ............................................. 41
          11.3.4    Settlements ............................................. 41
Section   11.4      Limitations on Indemnification........................... 42
          11.4.1    Indemnity Cushion........................................ 42
          11.4.2    Termination of Indemnification Obligations 
                    and Other Limitations.................................... 42
          11.4.3    Treatment ............................................... 42

                                       iv
<PAGE>

                                   ARTICLE XII
                                  MISCELLANEOUS

Section   12.1      Expenses................................................. 43
Section   12.2      Governing Law............................................ 43
Section   12.3      Person Defined........................................... 43
Section   12.4      Knowledge Defined........................................ 43
Section   12.5      Affiliate Defined........................................ 43
Section   2.6       Captions................................................. 43
Section   12.7      Confidentiality.......................................... 43
Section   12.8      Notices.................................................. 44
Section   12.9      Parties in Interest...................................... 44
Section   12.10     Severability............................................. 44
Section   12.11     Counterparts............................................. 45
Section   12.12     Entire Agreement......................................... 45
Section   12.13     Amendment................................................ 45
Section   12.14     Third Party Beneficiaries................................ 45
Section   12.15     Extension; Waiver........................................ 45
Section   12.16     Exchange Rate; Use of Terms.............................. 45

                                       v
<PAGE>

                                    EXHIBITS

         Exhibit A            Escrow Agreement
         Exhibit B            Affiliates Representation Letter
         Exhibit C-1          Opinion of Babst Calland Clements and Zomnir
         Exhibit C-2          Opinion of Ronald G. Cruikshank, Esq.
         Exhibit D-1          Opinion of Davis & Gilbert
         Exhibit D-2          Opinion of Cohen & Grigsby, P.C.


                                    SCHEDULES

         Schedule 1.4         Directors and Officers
         Schedule 3.2         Capitalization
         Schedule 3.3         Subsidiaries
         Schedule 3.4         Financial Statements
         Schedule 3.5         Books and Records
         Schedule 3.6         Title to Properties; Encumbrances
         Schedule 3.7.1       Real Property and Personal Property Leases
         Schedule 3.7.2       Owned Real Property
         Schedule 3.7.3       Environmental Matters
         Schedule 3.8         Contracts
         Schedule 3.9.1       Restrictive Documents
         Schedule 3.9.2       Regulatory and Other Approvals
         Schedule 3.10        Litigation
         Schedule 3.11        Taxes
         Schedule 3.13        Insurance
         Schedule 3.14        Intellectual Properties
         Schedule 3.16.1      Twenty Largest Clients
         Schedule 3.19        Employee Benefit Plans
         Schedule 3.20        Interests in Customers, Suppliers, etc.
         Schedule 3.21        Bank Accounts and Powers of Attorney
         Schedule 3.22        Compensation of Employees
         Schedule 3.23        Changes Since the Balance Sheet Date
         Schedule 3.27        Brokers
         Schedule 4.3.2       Approvals, Notices and Consents of Company
         Schedule 5.12        Repayment of Indebtedness
         Schedule 8.13        Employment Agreements
         Schedule 8.14        Non-Competition Agreements

                                       vi
<PAGE>

                             Index of Defined Terms

Term                                                                        Page
- ----                                                                        ----

Acquisition Proposal.........................................................33
Advisors.....................................................................33
Affiliate....................................................................53
Agreement.....................................................................1
Articles of Merger............................................................2
Asserted Liability...........................................................50
Balance Sheet................................................................10
Balance Sheet Date...........................................................11
Claims Notice................................................................50
Closing.......................................................................7
Closing Date..................................................................7
Code..........................................................................1
Common Stock Conversion Price.................................................3
Company.......................................................................1
Company Affiliates...........................................................42
Company Common Stock..........................................................4
Company Preferred Stock.......................................................4
Company Shareholders..........................................................5
Company Shareholders' Approval...............................................37
Company Stock.................................................................5
Constituent Corporations......................................................2
Contracts....................................................................16
Dissenting Share..............................................................5
Effective Time................................................................2
Environmental Laws...........................................................14
ERISA........................................................................21
ERISA Affiliate..............................................................22
Escrow Agent..................................................................7
Escrow Agreement..............................................................7
Exchange Act.................................................................16
Execution Date................................................................1
GAAP.........................................................................10
Gains Tax....................................................................42
General Escrow Fund...........................................................7
Governmental or Regulatory Authority.........................................16
HSR Act......................................................................16
Hazardous Material...........................................................14
Indemnified Parties..........................................................50
Information Statement........................................................27
Intellectual Property........................................................19
IRS..........................................................................18
KCI..........................................................................19

                                      vii
<PAGE>

Term                                                                        Page
- ----                                                                        ----

Knowledge....................................................................52
Laws.........................................................................16
Leases.......................................................................12
Letter of Transmittal.........................................................5
Liabilities..................................................................18
Licenses.....................................................................20
Lien.........................................................................10
Losses.......................................................................50
Market Value..................................................................3
Material Adverse Effect.......................................................9
Merger........................................................................1
Multi-Employer Plan..........................................................22
Multiple Employer Plan.......................................................22
Omnicom.......................................................................1
Omnicom Certificates..........................................................5
Omnicom Stock.................................................................3
OmniSub.......................................................................1
OmniSub Common Stock..........................................................4
Options.......................................................................9
Orders.......................................................................16
Owned Real Property..........................................................12
PBGC.........................................................................24
PBCL..........................................................................2
Permitted Liens..............................................................11
Person.......................................................................52
Plan.........................................................................22
Potential Acquiror...........................................................33
Preferred Stock Conversion Price..............................................3
Profit Sharing Plan..........................................................27
Prospectus Materials.........................................................41
Registration Statement.......................................................27
Related Group................................................................25
Representative...............................................................37
SEC..........................................................................16
SEC Reports..................................................................30
Securities Act...............................................................16
Special Escrow Fund...........................................................7

                                      viii
<PAGE>

Term                                                                        Page
- ----                                                                        ----

Special Meeting..............................................................37
Subsidiary....................................................................9
Surviving Corporation.........................................................2
Surviving Corporation Common Stock............................................4
Taxes........................................................................17
Termination Date.............................................................51
Third Party Claim............................................................50
Title IV Plan................................................................24
Transaction Costs............................................................28
Transfer Agent................................................................5
Transfer Taxes...............................................................42
VAT..........................................................................17
Voting Shareholders..........................................................37


                                       ix
<PAGE>

                          AGREEMENT AND PLAN OF MERGER

     AGREEMENT AND PLAN OF MERGER (the  "Agreement")  dated March 7, 1996 (the
"Execution  Date") by and  among  OMNICOM  GROUP  INC.,  a New York  corporation
("Omnicom");  KCI ACQUISITION INC., a Pennsylvania  corporation and wholly-owned
subsidiary of Omnicom ("OmniSub");  and KETCHUM COMMUNICATIONS HOLDINGS, INC., a
Pennsylvania corporation (the "Company").

                                   WITNESSETH:

     WHEREAS,  the Boards of Directors of Omnicom,  OmniSub and the Company each
have  determined  that  it is  advisable  and  in  the  best  interests  of  the
corporations and their respective stockholders to consummate, and have approved,
the business combination  transaction provided for herein in which OmniSub would
merge with and into the Company and the Company  would  become a  subsidiary  of
Omnicom  (the  "Merger")  upon the terms and subject to the  conditions  of this
Agreement;

     WHEREAS,  for federal  income tax purposes,  it is intended that the Merger
shall qualify as a  reorganization  within the meaning of Section  368(a) of the
Internal Revenue Code of 1986, as amended (the "Code");

     WHEREAS,   Omnicom,   OmniSub  and  the  Company  desire  to  make  certain
representations,  warranties,  covenants and  agreements in connection  with the
Merger, and to prescribe various conditions to the Merger; and

     NOW, THEREFORE, in consideration of the mutual representations, warranties,
covenants  and  agreements  set forth herein,  Omnicom,  OmniSub and the Company
hereby agree as follows:

                              ARTICLE I THE MERGER

                                   THE MERGER

     Section  1.1 The  Merger.  Subject  to the  terms  and  conditions  of this
Agreement,  at the Effective Time (as defined in Section 1.2),  OmniSub shall be
merged with and into the Company and the separate corporate existence of OmniSub
shall  thereupon  cease.  The  Company  shall  be  the  successor  or  surviving
corporation  in the  Merger  (sometimes  herein  referred  to as the  "Surviving
Corporation"),  shall continue to be governed by the laws of the Commonwealth of
Pennsylvania,  and the separate corporate  existence of the Company with all its
rights, privileges,  immunities, powers and franchises shall continue unaffected
by the Merger.  The Merger  shall have the effects  specified in Section 1921 of
the Pennsylvania Business Corporation Law ("PBCL").  OmniSub and the Company are
sometimes herein referred to as the "Constituent Corporations".

                                       1
<PAGE>

     Section 1.2 Effective Time. Omnicom,  OmniSub and the Company will cause an
appropriate   Articles   of  Merger,   including   a  summary   Plan  of  Merger
(collectively, the "Articles of Merger") to be executed and filed on the date of
the Closing  (as defined in Section  2.6) with the  Pennsylvania  Department  of
State as provided in Section 1927 of the PBCL. The Merger shall become effective
on the date on which the  Articles  of Merger  have  been  duly  filed  with the
Pennsylvania  Department  of State or such other  time as is agreed  upon by the
parties and  specified in the Articles of Merger,  and such time is  hereinafter
referred to as the "Effective Time."

     Section  1.3  Articles  of  Incorporation  and  By-Laws  of  the  
                   Surviving Corporation

     1.3.1  Articles of  Incorporation.  The  Articles of  Incorporation  of the
Surviving  Corporation  shall be amended and restated at and as of the Effective
Time to read as did the Articles of Incorporation of OmniSub  immediately  prior
to the Effective Time (except that the name of the Surviving  Corporation  shall
remain "Ketchum Communications Holdings, Inc.").

     1.3.2 By-Laws. The By-laws of the Surviving Corporation shall be amended at
and as of the Effective  Time to read as did the By-laws of OmniSub  immediately
prior to the  Effective  Time,  and such By-laws shall become the By-laws of the
Surviving Corporation.
              

     Section 1.4 Directors and Officers of the Surviving Corporation


     1.4.1 Directors of tDirectors of the Surviving  Corporation.  The directors
of the Surviving  Corporation  at the Effective  Time shall,  from and after the
Effective  Time,  be the persons  listed in Part 1 of  Schedule  1.4 until their
successors  have been duly  elected or  appointed  and  qualified or until their
earlier  death,   resignation  or  removal  in  accordance  with  the  Surviving
Corporation's Articles of Incorporation and By-laws.

     1.4.2 Officers of the Surviving Corporation.  The officers of the Surviving
Corporation  shall,  from and after the Effective Time, be the persons listed in
Part 2 of  Schedule  1.4  until  their  successors  have been  duly  elected  or
appointed  and  qualified  or until  their  death,  resignation  or  removal  in
accordance  with the  Surviving  Corporation's  Articles  of  Incorporation  and
By-laws.

                                   ARTICLE II

                              CONVERSION OF SHARES

     Section 2.1 Conversion of Capital Stock

     2.1.1 Conversion Prices; Market Value. For purposes of this Agreement,  the
following terms shall have the following meanings:

          (a) The "Common Stock Conversion  Price" shall be an amount calculated
     by dividing $44,940,000 by the number of shares of Company Common Stock (as
     defined below) outstanding at the Effective Time of the Merger.

          (b) The "Preferred Stock Conversion Price" shall be $1,000.

                                       2
<PAGE>

          (c) The "Market Value" of shares of common stock,  $0.50 par value, of
     Omnicom  ("Omnicom  Stock") shall be the average of the closing  prices per
     share of the Omnicom Stock  reported on the New York Stock Exchange for the
     20 consecutive trading days ending three business days immediately prior to
     the date of the Special  Meeting  referred to in Section  5.9.  The closing
     price  for  each  day  shall be the  closing  price  on the New York  Stock
     Exchange  Consolidated  Tape (or any  successor  composite  tape  reporting
     transactions  on the New York Stock  Exchange) or, if such a composite tape
     shall not be in use or shall not report  transactions in the Omnicom Stock,
     or if the Omnicom Stock shall be listed on a stock  exchange other than the
     New York Stock  Exchange,  the last reported sales price regular way on the
     principal national  securities exchange on which the Omnicom Stock shall be
     listed or  admitted  to trading  (which  shall be the  national  securities
     exchange on which the  greatest  number of shares of the Omnicom  Stock has
     been traded  during such twenty  consecutive  business  days)or,  in either
     case,  if there is no  transaction  on any such day, the average of the bid
     and asked  prices  regular  way on such day.  The New York  Stock  Exchange
     closing prices of the Omnicom Stock used in  determining  the Market Value,
     as provided above,  shall be  appropriately  adjusted for the effect of any
     recapitalization,  reclassification,  split-up, stock dividend, combination
     or reverse  split with respect to the Omnicom Stock which occurs during the
     20  consecutive   trading  days  ending  three  business  days  immediately
     preceding the date of the Special Meeting.

     2.1.2  Conversion of Capital Stock. At the Effective Time, by virtue of the
Merger and without any action on the part of the holder thereof:

          (a) Each  issued and  outstanding  share of the common  stock,  stated
     value  $0.005  per share,  of OmniSub  ("OmniSub  Common  Stock")  shall be
     converted into and become one fully paid and non-assessable share of common
     stock,  no par value per share,  of the Surviving  Corporation  ("Surviving
     Corporation  Common  Stock").  Each  certificate  representing  outstanding
     shares of OmniSub  Common Stock shall at the  Effective  Time  represent an
     equal number of shares of Surviving Corporation Common Stock.

          (b) All shares of common stock,  stated value $0.005 per share, of the
     Company  ("Company Common Stock") that are owned by the Company as treasury
     stock shall be  canceled  and retired and shall cease to exist and no stock
     of Omnicom or other consideration shall be delivered in exchange therefor.

          (c) Each issued and  outstanding  share of Company Common Stock (other
     than shares to be canceled in  accordance  with Section  2.1.2(b) and other
     than Dissenting  Shares (as defined in Section 2.1.2(f)) shall be converted
     into the right to  receive  such  number of fully  paid and  non-assessable
     shares of Omnicom Stock the value of which,  determined by using the Market
     Value,  shall equal the Common Stock  Conversion  Price. All such shares of
     Company Common Stock shall no longer be outstanding and shall automatically
     be canceled  and  retired  and shall  cease to exist,  and each holder of a
     certificate  representing  any such shares,  shall cease to have any rights
     with respect  thereto,  except subject to the terms of the Escrow Agreement
     referred  to in Section  2.7,  the right to  receive  the shares of Omnicom
     Stock  and any cash in lieu of  fractional  shares of  Omnicom  Stock to be
     issued or paid in  consideration  therefor  (determined in accordance  with
     Section 2.3),  upon the surrender of such  certificate  in accordance  with
     Section 2.2, without interest.

          (d) Each issued and  outstanding  share of Series A  Preferred  Stock,
     $100 par value per share, of the Company ("Company  Preferred Stock") shall


                                       3
<PAGE>

     be  converted  into the right to receive  such  number of shares of Omnicom
     Stock the value of which, determined by using the Market Value, shall equal
     the Preferred Stock Conversion Price.

          (e) All  shares  of  Company  Preferred  Stock  that are  owned by the
     Company as treasury  stock shall be canceled and retired and cease to exist
     and no stock  of  Omnicom  or other  consideration  shall be  delivered  in
     exchange therefor.

          (f)  (i)  Notwithstanding  any  provision  of  this  Agreement  to the
     contrary,  each  outstanding  share of Company Common Stock,  the holder of
     which has not voted in favor of the Merger,  has  perfected  such  holder's
     right to an  appraisal  of such  holder's  shares  in  accordance  with the
     applicable provisions of the PBCL and has not effectively withdrawn or lost
     such right of appraisal (a "Dissenting Share"), shall not be converted into
     or represent a right to receive shares of Omnicom Stock pursuant to Section
     2.1.2(c),  but the holder  thereof shall be entitled only to such rights as
     are granted by the applicable  provisions of the PBCL;  provided,  however,
     that any  Dissenting  Shares  held by a person  at the  Effective  Time who
     shall, after the Effective Time,  withdraw the demand for appraisal or lose
     the right of appraisal, in either case pursuant to the PBCL shall be deemed
     to be converted into, as of the Effective Time, the right to receive shares
     of Omnicom Stock pursuant to Section 2.1.2(c).

          (ii) The Company  shall give Omnicom (x) prompt  notice of any written
     demands for  appraisal,  withdrawals of demands for appraisal and any other
     instruments  served  pursuant  to the  applicable  provisions  of the  PBCL
     relating  to the  appraisal  process  received  by the  Company and (y) the
     opportunity to direct all  negotiations and proceedings with respect to any
     demands for appraisal under the PBCL. The Company will not voluntarily make
     any payment with respect to any demands for appraisal and will not,  except
     with the prior  written  consent of Omnicom,  settle or offer to settle any
     such demands.

     Section 2.2  Surrender of Company Stock and Issuance of Omnicom  Stock.  At
the  Closing,  or as soon as  practicable  thereafter,  each holder of record of
shares of Company Common Stock and/or  Company  Preferred  Stock  (collectively,
"Company   Stock")  at  the   Effective   Time   (collectively,   the   "Company
Shareholders")  whose shares are converted  pursuant to Section  2.1.2(c) and/or
2.1.2(d),  as the case may be, shall  surrender the  certificate or certificates
representing such shares of Company Stock to Omnicom's transfer agent (currently
Chemical Mellon Shareholder  Services) (the "Transfer  Agent"),  together with a
duly executed letter of transmittal in a form mutually acceptable to Omnicom and
the Company (the "Letter of  Transmittal"),  which  certificate or  certificates
shall be duly endorsed in the manner described in such Letter of Transmittal. In
exchange therefor,  subject to the provisions of the Escrow Agreement  described
in Section 2.7 below, each of the Company  Shareholders shall receive,  on or as
soon as  practicable  after the  Closing  Date (as  defined in Section  2.6),  a
certificate or certificates  representing  the number of whole shares of Omnicom
Stock into which the shares of the Company Stock theretofore  represented by the
certificate  or  certificates  so  surrendered  shall  have been  converted  and
exchanged as provided in Section 2.1.2(c) or 2.1.2(d),  as the case may be, and,
in addition,  cash in lieu of any fractional shares of Omnicom Stock as provided
in Section 2.3 below, and the  certificate(s)  so surrendered shall forthwith be
canceled. Prior to the Closing Date, Omnicom shall requisition from the Transfer
Agent a sufficient  number of stock  certificates  (the "Omnicom  Certificates")
representing  the total  number of shares of Omnicom  Stock to which the Company
Shareholders  are entitled as provided in Sections  2.1.2(c) and 2.1.2(d) above.
On the Closing Date, subject to the provisions of the Escrow Agreement described
in Section 2.7,  Omnicom shall direct the Transfer Agent pursuant to irrevocable


                                       4
<PAGE>

instructions   reasonably  acceptable  to  the  Company  to  mail  each  Company
Shareholder  upon  receipt  by the  Transfer  Agent  of an  executed  Letter  of
Transmittal  from such Company  Shareholder,  by first-class  mail in accordance
with the instructions of such Company  Shareholder as set forth in his Letter of
Transmittal,  such  Omnicom  Certificates,  and Omnicom  shall  forward the cash
payment in lieu of fractional  shares (if any) that such Company  Shareholder is
entitled to receive  pursuant to Section 2.3. If any Company  Shareholder  shall
report  to the  Transfer  Agent  that  his  failure  to  surrender  certificates
representing  shares of Company Stock registered in his name is due to the loss,
misplacement or destruction of such a certificate or certificates, Omnicom shall
require such Company  Shareholder  to furnish an affidavit of loss and indemnity
satisfactory  to it. Upon receipt by the Transfer  Agent of such  affidavit  and
indemnity,  such  Company  Shareholder  shall be entitled to receive the Omnicom
Certificates  and cash in lieu of  fractional  shares,  (if  any) to which  such
Company  Shareholder  is entitled  pursuant to the terms of this  Article II and
such lost,  misplaced or destroyed  certificate(s)  shall forthwith be canceled.
Until  surrendered  as  contemplated  by  this  Section  2.2,  each  certificate
evidencing  shares  of  Company  Stock  shall be  deemed  at any time  after the
Effective  Time for all  corporate  purposes  of  Omnicom,  except as limited by
Section 2.4 below,  to  represent  ownership  of the number of shares of Omnicom
Stock into which the number of shares of Company  Stock shown  thereon have been
converted as contemplated by this Article II.

     Section  2.3 No  Fractional  Shares.  In  order to avoid  the  expense  and
inconvenience of issuing fractional shares,  neither  certificates nor scrip for
fractional  shares of Omnicom  Stock will be issued,  but in lieu  thereof  each
Company  Shareholder  who otherwise  would have been entitled to a fraction of a
share of Omnicom  Stock will be paid the cash value of such  fraction of a share
based upon the Market Value of the Omnicom  Stock as  determined  under  Section
2.1.1(c)  or  2.1.1(d)  above.  Prior to the Closing  Date,  Omnicom  shall make
available  to the  Transfer  Agent  cash in an  amount  sufficient  to make  the
payments in lieu of fractional  shares.  The fractional  share interests of each
Company Shareholder will be aggregated,  and no Company Shareholder will receive
cash in an  amount  equal  to or  greater  than the  value of one full  share of
Omnicom Stock.

     Section  2.4  Dividends.  Omnicom  will  not pay any  dividend  or make any
distribution  on the Omnicom Stock (with a record date at or after the Effective
Time) to any record  holder of Company  Stock  until the holder  surrenders  for
exchange his or its certificates.  Omnicom instead will pay the dividend or make
the  distribution  to the Transfer  Agent in trust for the benefit of the holder
pending surrender and exchange. In no event, however, will any holder of Company
Stock be entitled to any  interest or earnings on the  dividend or  distribution
pending receipt. Neither the Transfer Agent nor any party hereto shall be liable
to a holder of Company Stock for any Omnicom Stock or dividends thereon, or cash
in lieu of fractional Omnicom Stock,  delivered to a public official pursuant to
the applicable  escheat law. The Transfer Agent shall not be entitled to vote or
exercise any rights of ownership  with respect to the Omnicom  Stock held by it.
Omnicom shall pay all charges and expenses of the Transfer Agent.

     Section 2.5 Certificates in Shareholder's Name. All certificates evidencing
Omnicom Stock to be issued as a result of the Merger will be issued in the exact
name which the certificates surrendered in exchange therefor are registered.

     Section 2.6 Closing.  The closing of this Agreement (the  "Closing")  shall
take place (a) at the offices of Davis & Gilbert, 1740 Broadway, New York, New


                                       5
<PAGE>

York 10019, at 10:00 a.m. local time on May 31, 1996, or (b) at such other place
and/or time  and/or on such other date as Omnicom  and the  Company  shall agree
(the "Closing Date").

     Section 2.7 Escrow Agreement. Solely to fund and secure the indemnification
obligations  described in Section 11.2, at the Closing  Omnicom shall direct the
Transfer Agent for and on behalf of the Company  Shareholders  to deliver to The
Chase Manhattan Bank, N.A., as escrow agent (the "Escrow Agent") from the shares
of Omnicom Stock issuable to the Company  Shareholders  under Section  2.1.2(c),
(a) shares of  Omnicom  Stock (for each  Company  Shareholder  rounded up to the
nearest  whole  share)  having a Market  Value  of  $4,400,000  to be held in an
account  (the  "General  Escrow  Fund")  created  pursuant  to the terms of that
certain Escrow Agreement (the "Escrow Agreement") in the form attached hereto as
Exhibit A among  Omnicom,  the Surviving  Corporation,  the Escrow Agent and the
Representative  (as  defined in Section  5.9  hereof)  and (b) shares of Omnicom
Stock (for each  Company  Shareholder  rounded up to the  nearest  whole  share)
having a Market  Value of  $2,500,000  to be held in an  account  (the  "Special
Escrow Fund") created pursuant to the terms of the Escrow Agreement. Each of the
Company  Shareholders  shall be  depositing  his  pro-rata  share of the General
Escrow Fund or Special Escrow Fund determined by multiplying the total number of
shares of Omnicom Stock required to be deposited into such Escrow Fund to create
in the case of the General  Escrow Fund an escrow  account having a Market Value
of  $4,400,000  and in the case of the  Special  Escrow  Fund an escrow  account
having a Market Value of $2,500,000 times a fraction,  the numerator of which is
the number of shares of Omnicom Stock issuable to such Company Shareholder under
Section 2.1.2(c),  and the denominator of which is the total number of shares of
Omnicom Stock issuable to all Company Shareholders under Section 2.1.2(c).


                                   ARTICLE III

                         REPRESENTATIONS OF THE COMPANY

     The Company represents and warrants to Omnicom and OmniSub as follows:

     Section 3.1 Execution  and Validity of Agreement.  The Company has the full
corporate power and authority to enter into this  Agreement,  and subject to the
Company  Shareholders'  Approval  (as  defined in Section  5.9),  to perform its
obligations  hereunder and to consummate the transactions  contemplated  hereby.
The execution, delivery and performance of this Agreement by the Company and the
consummation by the Company of the  transactions  contemplated  hereby have been
duly and validly authorized by the Board of Directors of the Company,  the Board
of Directors of the Company has  recommended  adoption of this  Agreement by the
Company  Shareholders  and  directed  that this  Agreement  be  submitted to the
Company Shareholders for their consideration, and no other corporate proceedings
on the part of the Company or its  stockholders  are  necessary to authorize the
execution,  delivery and  performance  of this  Agreement by the Company and the
consummation by the Company of the transactions  contemplated  hereby other than
obtaining the Company Shareholders'  Approval.  This Agreement has been duly and
validly executed and delivered by the Company and,  assuming due  authorization,
execution  and delivery by Omnicom and OmniSub,  and subject to the obtaining of
the Company  Shareholders'  Approval,  constitutes the legal,  valid and binding
obligation of the Company enforceable against it in accordance with its terms.



                                       6
<PAGE>

     Section 3.2 Capitalization, Existence and Good Standing of the Company.

     3.2.1  Capitalization.   The  Company  has  an  authorized   capitalization
consisting of 2,000,000  shares of common stock,  without par value and having a
stated  value of $.005  cents  per  share,  of which as of the  Execution  Date,
374,967  shares were  issued and  outstanding  and  989,033  shares were held in
treasury;  and 50,000 shares of preferred  stock,  $100 par value per share,  of
which as of the Execution  Date,  6,282 shares of Company  Preferred  Stock were
issued and outstanding and no shares were held in treasury. All such outstanding
shares  have been duly  authorized  and  validly  issued  and are fully paid and
non-assessable and have not been issued in violation of any preemptive rights of
stockholders.  No other class of capital stock or series of any class of capital
stock of the  Company is  authorized  or  outstanding.  Except  pursuant to this
Agreement and except as set forth on Schedule 3.2, there are no (a)  outstanding
subscriptions,  options,  warrants,  rights (including  "phantom" stock rights),
calls,  preemptive  rights, or other contracts,  commitments,  understandings or
arrangements,   including  any  right  of  conversion  or  exchange   under  any
outstanding security,  instrument, plan or agreement (collectively,  "Options"),
obligating the Company or any of its Subsidiaries (as defined in Section 3.3) to
issue or sell any  shares  of the  capital  stock of the  Company,  or to grant,
extend or enter into any Option with respect thereto, or (b) outstanding Options
providing for settlement in cash. Except as set forth on Schedule 3.2, there are
no  outstanding  contractual  obligations  of the Company or any  Subsidiary  to
repurchase,  redeem or otherwise  acquire any shares of any capital stock of the
Company or any  Subsidiary  or which  provide for the payment of any  additional
monies in respect of its previous repurchase of any shares of its capital stock.
Schedule 3.2 also  contains an accurate  list of all of the holders of record of
capital stock of the Company.  Each such  stockholder is the record owner of the
number of shares of the Company Common Stock or Company  Preferred  Stock listed
opposite his name in Schedule 3.2. To the best knowledge, information and belief
of the  Company,  each  such  stockholder  is a  resident  of the state or other
jurisdiction indicated on Schedule 3.2.

     3.2.2  Existence  and Good  Standing.  The  Company is a  corporation  duly
organized  and validly  existing and for which no Articles of  Dissolution  have
been filed under the laws of the  Commonwealth  of  Pennsylvania,  with the full
corporate  power and  authority to own its property and to carry on its business
all as and in the places where such properties are now owned or operated or such
business  is now  being  conducted.  Except as set forth on  Schedule  3.2,  the
Company  has not  qualified  to do  business  as a  foreign  corporation  in any
jurisdiction,  and neither the character nor location of the properties owned or
leased by the Company,  nor the nature of the business conducted by the Company,
requires such qualification in any jurisdiction,  except for such failures to be
so qualified which,  individually or in the aggregate,  are not having and could
not  reasonably be expected to have a "Material  Adverse  Effect",  defined as a
material  adverse  effect on the  properties,  assets,  condition  (financial or
otherwise),  business,  liabilities  or results of operations of the Company and
its Subsidiaries taken as a whole. The Company is in good standing in each state
or other  jurisdiction  in which it is  qualified  to do  business  as a foreign
corporation or foreign branch as set forth on Schedule 3.2.

     Section 3.3 Subsidiaries and Investments.  The term "Subsidiary" as used in
the Agreement shall mean any Person in which the Company, directly or indirectly
through subsidiaries or otherwise, beneficially owns or controls more than fifty
percent of either the  equity  interests  in, or the  voting  control  of,  such
Person.  Schedule 3.3 contains a true and complete  list of all of the Company's
Subsidiaries. Except as set forth in Schedule 3.3,  neither the  Company nor any


                                       7
<PAGE>

Subsidiary  owns any capital  stock or other equity or ownership or  proprietary
interest in any corporation,  partnership,  association, trust, joint venture or
other  entity.   Schedule  3.3  also  sets  forth  the  name,   jurisdiction  of
organization and number of outstanding shares of each of the Subsidiaries, and a
list of all of the  stockholders  of each  Subsidiary  (indicating the number of
shares owned by each such  stockholder).  Except for shares held by a nominee of
the Company or another Subsidiary to satisfy local law requirements, the Company
or another  Subsidiary  owns of record and  beneficially  and has valid title to
that  percentage of the issued and  outstanding  shares of capital stock of each
Subsidiary as set forth on Schedule 3.3, free and clear of any mortgage, pledge,
assessment,  security  interest,  lease,  lien,  adverse  claim,  levy,  charge,
hypotheca or other encumbrance of any kind, or any conditional sale,  agreement,
title retention  agreement or other agreement to give any of the foregoing (each
a "Lien").  Each Subsidiary is a corporation  duly  incorporated  and organized,
validly  existing and in good  standing  under the laws of its  jurisdiction  of
organization,  with the full  corporate  power and authority to own its property
and to carry on its business all as and in the places where such  properties are
now owned or operated or such  business  is now being  conducted.  Except as set
forth on Schedule 3.3, no  Subsidiary  has qualified to do business as a foreign
corporation in any  jurisdiction,  and neither the character nor the location of
the properties owned or leased by any Subsidiary, nor the nature of the business
conducted by such Subsidiary,  requires such  qualification in any jurisdiction,
except  for such  failures  to be so  qualified  which,  individually  or in the
aggregate,  are not  having  and  could not  reasonably  be  expected  to have a
Material  Adverse Effect.  Each Subsidiary is in good standing in each state, or
other  jurisdiction  in  which  it is  qualified  to do  business  as a  foreign
corporation or foreign branch as set forth on Schedule 3.3.  Except as set forth
on Schedule 3.3,  neither the Company nor any Subsidiary  has a branch,  agency,
place of business or permanent  establishment  outside of the United States. All
of the  outstanding  shares of capital stock of each  Subsidiary  have been duly
authorized  and validly issued and are fully paid and  non-assessable,  and have
not been issued in violation of any preemptive rights of stockholders. Except as
set forth on Schedule 3.3, there are no (a) outstanding  Options  obligating the
Company or any  Subsidiary to purchase,  issue or sell any shares of the capital
stock of any  Subsidiary  or other  entity  in which the  Company  or one of its
Subsidiaries owns a minority interest or outstanding  agreement or commitment to
grant,  extend or enter  into any  Option  with  respect  thereto  or (b) voting
trusts,   proxies  or  other   commitments,   understandings,   restrictions  or
arrangements  in favor of any  Person  other than the  Company or a  Subsidiary,
wholly-owned,  directly or indirectly, by the Company with respect to the voting
of or the right to  participate  in dividends  or other  earnings on any capital
stock of any Subsidiary.

     Section 3.4 Financial Statements and No Material Changes. Schedule 3.4 sets
forth  the  audited   consolidated   balance  sheets  of  the  Company  and  its
subsidiaries  as at December 31, 1993,  1994 and 1995,  and the related  audited
statements of operations, stockholders' equity and cash flows for the years then
ended,  reported  on by  Deloitte & Touche  LLP,  independent  certified  public
accountants.  The consolidated balance sheet of the Company and its subsidiaries
as at December 31, 1995 is referred to in this Agreement as the "Balance Sheet".
Such financial statements, including the footnotes thereto, are true and correct
in all  material  respects  and  except as set forth on  Schedule  3.4 have been
prepared in accordance with generally accepted accounting  principles as applied
in the United  States  ("GAAP")  consistently  applied  throughout  the  periods
indicated.  Each of the  consolidated  balance  sheets  of the  Company  and its
subsidiaries fairly presents the consolidated  financial position of the Company
and its  subsidiaries  at the  respective  date  thereof and reflects all claims
against and all debts and liabilities of the Company and its subsidiaries, fixed
or contingent,  as at the date thereof, required to be shown thereon under GAAP,
and the related  statements of operations,  stockholders'  equity and cash flows


                                       8
<PAGE>

fairly  present the  consolidated  results of  operations of the Company and its
subsidiaries  and the  stockholders'  equity and cash  flows for the  respective
periods indicated. Except as set forth on Schedule 3.23, since December 31, 1995
(the "Balance  Sheet Date"),  there has been no material  adverse  change in the
properties,  financial  condition,  business  or  results of  operations  of the
Company and its Subsidiaries taken as a whole.

     Section 3.5 Books and Records. All accounts,  books and ledgers material to
the  business  of the  Company  and its  Subsidiaries  have  been  properly  and
accurately  kept and  completed  in all  material  respects,  and  there  are no
material  inaccuracies  or  discrepancies  of any kind  contained  or  reflected
therein. Except as set forth on Schedule 3.5, neither the Company nor any of its
Subsidiaries  has any of its records,  systems,  controls,  data or  information
recorded, stored,  maintained,  operated or otherwise wholly or partly dependent
on or held by any means  (including any  electronic,  mechanical or photographic
process,  whether  computerized  or not)  which  (including  all means of access
thereto and therefrom) are not under the exclusive  ownership and direct control
of the Company or such  Subsidiary.  The Company  has  delivered  to Omnicom and
OmniSub complete and correct copies of the Articles of Incorporation and By-laws
(or equivalent  charter  documents) of the Company and of each  Subsidiary;  and
prior  to  the  Closing  will  deliver  any  approved  amendments,   changes  or
restatements of such instruments.

     Section  3.6  Title  to  Properties;  Encumbrances.  The  Company  and  its
Subsidiaries  have  good and  marketable  title  to,  or  enforceable  leasehold
interests in, as the case may be, all the properties and assets owned or used by
them  (real  and  personal,   tangible  and  intangible),   including,   without
limitation,  (a) all the properties  and assets  reflected in the Balance Sheet,
and  (b)  all  the  properties  and  assets  purchased  by the  Company  and its
Subsidiaries  since the  Balance  Sheet Date  except for  properties  and assets
reflected  in the Balance  Sheet or acquired  since the Balance  Sheet Date that
have been sold or otherwise disposed of in the ordinary course of business, free
and clear of any and all  Liens,  except  for  Permitted  Liens (as  hereinafter
defined) and for Liens  reflected in the  footnotes to the Balance  Sheet or set
forth on Schedule 3.6. As used in this  Agreement,  the term  "Permitted  Liens"
shall mean:  (i) Liens for Taxes (as defined in Section 3.11) not  delinquent or
for Taxes being  contested in good faith by  appropriate  proceedings  and as to
which adequate financial reserves have been established on the books and records
of the Company in accordance  with GAAP; (ii) Liens created by operation of law,
such as materialmen's  liens,  mechanics' liens and other similar liens, arising
in the  ordinary  course of business and not having a Material  Adverse  Effect;
(iii) deposits, pledges or Liens securing (x) obligations incurred in respect of
workers'  compensation,  unemployment  insurance or other forms of  governmental
insurance or benefits, (y) the performance of bids, tenders,  leases,  contracts
(other  than  for  the  payment  of  money)  and  statutory  obligations  or (z)
obligations  on surety or appeal  bonds,  but only to the extent such  deposits,
pledges or Liens are  incurred  or  otherwise  arise in the  ordinary  course of
business and secure  obligations which are not past due; or (iv) restrictions on
the use of real property or irregularities in the title thereto which do not (x)
secure  obligations for the payment of money or (y) materially  impair the value
of such  property  or its use by the  Company  or any  Subsidiary  in the normal
conduct of the Company's or such Subsidiary's business.

     Section 3.7 Owned and Leased Real Property and Leased Personal Property

     3.7.1 Real Property and Personal  Property Leases.  Schedule 3.7.1 contains
an accurate  and  complete  list of all  personal  property  leases with a fixed
annual  rental in excess of $20,000  and all real  property  leases,  subleases,
licenses and other occupancy  agreements  (including,  without  limitation,  any
modification,  amendment  or  supplement  thereto  and  any  other  document  or


                                       9
<PAGE>

agreement  executed or entered  into by Company or a  Subsidiary  in  connection
therewith, such as, without limitation,  non-disturbance agreements and estoppel
certificates) (collectively, "leases") to which the Company or a Subsidiary is a
party,  including without  limitation,  leases which the Company or a Subsidiary
has  subleased  or  assigned  to a third  party and as to which the Company or a
Subsidiary  remains liable.  Each lease set forth on Schedule 3.7.1 (or required
to be set  forth on  Schedule  3.7.1) is valid,  binding  and in full  force and
effect; all rents and additional rents and other sums,  expenses and charges due
to date on each such lease have been paid; in each case,  the lessee has been in
peaceable  possession  since the commencement of the original term of such lease
and no waiver, indulgence or postponement of the lessee's obligations thereunder
has been  granted by the lessor;  and,  except as set forth in  Schedule  3.7.1,
there exists no default or event of default by the Company or any  Subsidiary or
to the best knowledge, information and belief of the Company, by any other party
to such lease;  and there exists no occurrence,  condition or act (including the
Merger  hereunder)  which,  with the giving of notice,  the lapse of time or the
happening of any further event or condition,  would become a default or event of
default under any such lease;  and there are no outstanding  claims of breach or
indemnification  or notice of default or termination of any such lease.  No such
lease is subject and subordinate to any superior lease or mortgage except as set
forth in Schedule 3.7.1 and the Company and its Subsidiaries  hold the leasehold
estate  interest  in all such  leases  free and  clear of all Liens  except  for
Permitted  Liens and except as set forth in Schedule 3.6. Except as set forth on
Schedule 3.7.1, the Company or a Subsidiary is in physical possession and actual
and exclusive occupation of the whole of each of their leased properties.

     3.7.2  Owned  Real  Property.   Schedule  3.7.2  lists  all  real  property
(including  ground lease interests) owned by the Company and its Subsidiaries or
which  the  Company  or a  Subsidiary  has an option to  purchase  ("Owned  Real
Property").  With respect to each such parcel of Owned Real Property, and except
as set forth on Schedule 3.7.2:

          (a) there are no pending or, to the best  knowledge,  information  and
     belief of the Company,  threatened  condemnation  proceedings,  lawsuits or
     administrative  actions  relating  to the Owned Real  Property  or entities
     owning same,  materially and adversely affecting the current or future use,
     occupancy or value thereof;

          (b) no entity has an option to purchase the Owned Real  Property or an
     interest therein, except the Company or a Subsidiary, if applicable;

          (c) all  facilities  have  received all approvals of  Governmental  or
     Regulatory  Authorities,  as defined in Section 3.9.1,  (including material
     Licenses,  as defined in Section  3.15.2)  required in connection  with the
     ownership,  operation  thereof,  and have been  operated and  maintained in
     accordance  with  applicable  laws,  rules and  regulations in all material
     respects;

          (d) no material  default  exists under any lease  affecting  the Owned
     Real Property;

          (e) the  Company  or its  Subsidiaries  maintain  reasonably  adequate
     casualty and  liability  insurance  with respect to their  interests in the
     Owned Real Property and leases;

          (f) no prior assessments,  additional  contributions and capital calls
     required  of the  Company  or a  Subsidiary  remain  unpaid and to the best
     knowledge,   information  and  belief  of  the  Company,   no  assessments,
     additional contribution or capital calls are currently anticipated.

                                       10
<PAGE>

          (g) no other occupants,  subtenants, or licensees occupying all or any
     portion of the Owned Real Property pursuant to written lease, agreement, or
     otherwise;  (h) no title or  survey  defects,  liens of any kind or  nature
     (including, but not limited to, mortgages, or Deeds of Trust, real property
     tax liens, or security interests) or encumbrances  affecting the Owned Real
     Property.

     3.7.3 Environmental Matters. Except as disclosed on Schedule 3.7.3:

          (a) there are no inquiries,  litigation or other proceedings  pending,
     or, to the best knowledge, information and belief of the Company threatened
     with regard to the current or prior  conduct of the  Company's  business or
     any Owned Real  Property  with respect to any law,  regulation or ordinance
     relating to the  regulation or  protection  of human health,  safety or the
     environment  ("Environmental  Laws") concerning air, soil or water quality,
     or the emission,  discharge,  release or threatened  release of pollutants,
     contaminants,  chemicals or  industrial,  toxic or hazardous  substances or
     wastes or words of similar import (collectively, "Hazardous Material") into
     the environment;

          (b) the Company and its Subsidiaries have operated their businesses in
     compliance  with all  Environmental  Laws  except  where the  failure to so
     comply would not have a Material Adverse Effect;

          (c) the Owned Real  Property is not subject to any  judgment,  decree,
     order or  citation  which  relates to or arises out of a  violation  of any
     Environmental Laws;

          (d) all Licenses  which are required  under  applicable  Environmental
     Laws in connection  with the conduct of the business of the Company and its
     Subsidiaries have been obtained. Each of such Licenses is in full force and
     effect.  No additional  Licenses are required under any  Environmental  Law
     relative to any Owned Real  Property,  the failure of which to obtain would
     have a Material Adverse Effect;

          (e) to the best knowledge,  information and belief of the Company,  no
     Hazardous  Materials have been recycled,  treated,  stored,  disposed of or
     released by the Company or any Subsidiary at any location; and

          (f)  no  oral  or  written  notification  of a  release  of  Hazardous
     Materials in  connection  with the operation of the business of the Company
     and its  Subsidiaries  has  been  filed on  behalf  of the  Company  or any
     Subsidiary,  and no site or facility now owned,  or to the best  knowledge,
     information and belief of the Company, previously owned, operated or leased
     by the  Company  or any  Subsidiary  or any of the Owned Real  Property  is
     listed or to the best  knowledge,  information  and  belief of the  Company
     proposed for listing on any  federal,  state,  provincial  or local list of
     sites requiring investigation or clean-up.

     Section  3.8  Contracts.  Schedule  3.8 hereto  contains  an  accurate  and
complete list of the following agreements to which the Company or any Subsidiary
is a party:  (a) all Plans (as such term is defined in  Section  3.19),  (b) any
agreement,  contract  or  commitment  relating  to  capital  expenditures  which
involves payments of $250,000 or more in any single or related transaction,  (c)
any  agreement,  contract  or  commitment  relating  to the  making of any loan,
advance  or  investment  in any  Person,  which in any case  involves  more than
$50,000,  (d) any agreement,  instrument or arrangement evidencing or related in


                                       11
<PAGE>

any  way  to  indebtedness   (excluding   indebtedness   from  any  wholly-owned
subsidiary)  for  money  borrowed  or  to  be  borrowed,   whether  directly  or
indirectly, by way of loan, purchase money obligation,  guaranty (other than the
endorsement of negotiable  instruments  for collection in the ordinary course of
business),  conditional sale, purchase or otherwise,  which in any case involves
$100,000 or more,  (e) any  management  service,  employment,  consulting or any
other similar type of contract which is not cancelable  without penalty or other
financial  obligation within 30 days and which has total annual  remuneration in
excess of $100,000 or has total  compensation over the term thereof in excess of
$300,000,  (f) any  agreement,  contract or  commitment  limiting its freedom to
engage in any line of business or to compete  with any other  Person,  including
agreements  limiting  its  ability  to take on  competitive  accounts  after the
termination  thereof  or  limiting  the  ability  of its  affiliates  to take on
competitive accounts during the term thereof, but excluding standard exclusivity
requirements in agency-client  agreements entered into in the ordinary course of
business,  (g) any  agreement,  contract  or  commitment  not covered by another
clause of this  Section 3.8 which is material to the  business of the Company or
any of its Subsidiaries,  (h) any collective bargaining or union agreement,  (i)
any agreement with any of its officers or directors or  stockholders  (including
stockholder  agreements  or  indemnification  agreements),  (j) any  secrecy  or
confidentiality  agreement  (other than standard  confidentiality  agreements in
computer software license agreements or agency-client agreements entered into in
the ordinary  course of  business),  (k) any  licensing  or franchise  agreement
(other  than "off the shelf"  computer  software  license  agreements),  (l) all
agency-client  agreements  for each client of the  Company and its  subsidiaries
required to be listed in Schedule  3.16.1 hereof,  (m) any agreements with media
buying  services;  provided,  however,  commitments  to  purchase  media  in the
ordinary course of business do not have to be set forth on Schedule 3.8, (n) any
agreement,  indenture  or other  instrument  which  contains  restrictions  with
respect to the payment of  dividends  or other  distributions  in respect of the
Company  Common  Stock,  (o)  any  outstanding   promissory  note  to  a  former
stockholder  of the Company in respect of the  Company's  repurchase  of Company
Common Stock from such former  stockholders  (together with a statement  setting
forth the  outstanding  balance of each such promissory note as of a date within
five days prior to the Execution  Date,  the number of shares of Company  Common
Stock (if any) held in escrow  relating to each such  repurchase and the name of
the escrow agent),  (p) any joint venture or partnership  agreement  involving a
sharing of profits not covered by (a) through (o) above; provided, however, that
(x)  commitments to media and production  expenses which are fully  reimbursable
from clients,  and (y) estimates or purchase orders given in the ordinary course
of business  relating to the execution of projects,  do not have to be set forth
on Schedule 3.8. Each  contract,  agreement or commitment  set forth on Schedule
3.8 (or  required to be set forth on Schedule  3.8) is in full force and effect,
and there exists no default or event of default by the Company or any Subsidiary
or to the best knowledge,  information  and belief of the Company,  by any other
party, or occurrence,  condition, or act (including the Merger hereunder) which,
with the giving of notice, the lapse of time or the happening of any other event
or condition,  would become a default or event of default thereunder,  and there
are no outstanding  claims of breach or  indemnification or notice of default or
termination of any such agreements, contracts or commitments.

     Section  3.9  Non-Contravention;   Approvals  and  Consents. 

     3.9.1  Non-Contravention.  Except  as set  forth  on  Schedule  3.9.1,  the
execution,  delivery and performance by the Company of its obligations hereunder
and the consummation of the transactions  contemplated hereby, will not conflict
with,  result in a violation or breach of, constitute (with or without notice or
lapse of time or both) a  default  under,  result in or give to any  Person  any


                                       12
<PAGE>

right of payment or reimbursement,  termination,  cancellation,  modification or
acceleration of, or result in the creation or imposition of any Lien upon any of
the assets or  properties  of the Company or any  Subsidiary  under,  any of the
terms,  conditions  or  provisions  of  (a)  the  certificates  or  articles  of
incorporation or by-laws (or other comparable  charter documents) of the Company
or any Subsidiary,  or (b) subject to the obtaining of the Company Shareholders'
Approval  and the taking of the  actions  described  in Section  3.9.2,  (i) any
statute,  law,  rule,  regulation or ordinance  (collectively,  "Laws"),  or any
judgment,  decree, order, writ, permit or license (collectively,  "Orders"),  of
any court, tribunal,  arbitrator,  authority,  agency,  commission,  official or
other  instrumentality of the United States, any foreign country or any domestic
or foreign state,  county, city or other political  subdivision (a "Governmental
or Regulatory Authority"), applicable to the Company or any Subsidiary or any of
their  respective  assets  or  properties,  or (ii) any  note,  bond,  mortgage,
security agreement, indenture, license, franchise, permit, concession, contract,
lease or other  instrument,  obligation or agreement of any kind  (collectively,
"Contracts")  to which the Company or any  Subsidiary is a party or by which the
Company or any  Subsidiary  or any of their  respective  assets or properties is
bound.

     3.9.2  Approvals  and  Consents.  Except (a) for the filing of a pre-merger
notification  report  by  the  Company  under  the  Hart-Scott-Rodino  Antitrust
Improvements Act of 1976, as amended,  and the rules and regulations  thereunder
(the  "HSR  Act"),  (b)  for  the  filing  of  the  Information   Statement  and
Registration  Statement  (as those terms are  defined in Section  3.26) with the
Securities  and  Exchange  Commission  (the "SEC")  pursuant  to the  Securities
Exchange Act of 1934, as amended, and the rules and regulations  thereunder (the
"Exchange Act"),  and the Securities Act of 1933, as amended,  and the rules and
regulations   thereunder  (the   "Securities   Act"),  the  declaration  of  the
effectiveness  of the  Registration  Statement  by the SEC and any filings  with
state   securities   authorities  that  are  required  in  connection  with  the
transactions  contemplated by this Agreement, (c) for the filing of the Articles
of Merger and other appropriate  merger documents required by the PBCL, with the
Pennsylvania  Department of State and  appropriate  documents  with the relevant
authorities  of other states in which the Company and/or OmniSub is qualified to
do business,  and (d) as disclosed on Schedule  3.9.2,  no consent,  approval or
action of, filing with or notice to any Governmental or Regulatory  Authority or
other public or private  third party is  necessary or required  under any of the
terms,  conditions  or  provisions  of any Law or Order of any  Governmental  or
Regulatory  Authority  or  any  Contract  to  which  the  Company  or any of its
Subsidiaries  is a party or by which the Company or any of its  Subsidiaries  or
any of their  respective  assets or  properties  is bound for the  execution and
delivery of this Agreement by the Company, the performance by the Company of its
obligations  hereunder  or the  consummation  of the  transactions  contemplated
hereby.

     Section 3.10 Litigation.  Except as set forth on Schedule 3.10, there is no
action,  suit,  proceeding at law or in equity by any Person, or any arbitration
or any  administrative  or  other  proceeding  by or  before  (or  to  the  best
knowledge,  information  and belief of the Company,  any  investigation  by) any
Governmental  or  Regulatory  Authority,  pending  or,  to the  best  knowledge,
information and belief of the Company threatened,  against the Company or any of
its officers,  directors,  employees or agents with respect to this Agreement or
the transactions contemplated hereby, or against or affecting the Company or any
Subsidiary  or  any  of  their  properties  or  rights;   and  no  acts,  facts,
circumstances, events or conditions occurred, or exist which are a basis for any
such action, proceeding or investigation.  Except as set forth on Schedule 3.10,
neither the Company nor any  Subsidiary  is subject to any Order  entered in any
lawsuit or proceeding.

                                       13
<PAGE>

Section 3.11 Taxes

     3.11.1 Taxes. The Company and its Subsidiaries  have timely filed or caused
to be filed,  taking into account any valid extensions of due dates,  completely
and  accurately,  all federal and all material  state,  local and foreign tax or
information  returns  (including  estimated  tax  returns)  required  under  the
statutes,  rules or regulations of such jurisdictions to be filed by the Company
and its Subsidiaries. The term "Taxes" means taxes, duties, charges or levies of
any  nature  imposed by any taxing or other  governmental  authority,  including
without limitation income,  gains,  capital gains, surtax,  capital,  franchise,
capital stock,  value-added  taxes  ("VAT"),  taxes required to be deducted from
payments made by the payor and accounted  for to any tax  authority,  employees'
income  withholding,  back-up  withholding,  withholding  on payments to foreign
persons,   social   security,   national   insurance,   unemployment,   worker's
compensation, payroll, disability, real property, personal property, sales, use,
goods and  services  or other  commodity  taxes,  business,  occupancy,  excise,
customs and import duties, transfer, stamp, and other taxes (including interest,
penalties  or additions  to tax in respect of the  foregoing),  and includes all
taxes payable by the Company or any Subsidiary pursuant to Treasury  Regulations
(beta)1.1502-6  or any similar  provision  of state,  local or foreign  law. All
Taxes  shown  on said  returns  to be due  have  been  paid  and all  additional
assessments  received  prior to the date  hereof  have  been  paid or are  being
contested in good faith, in which case such contested  assessments are disclosed
on Schedule 3.11. The amount set up as an accrual for Taxes on the Balance Sheet
is  sufficient  for the  payment  of all  unpaid  Taxes of the  Company  and its
Subsidiaries, whether or not disputed, for all periods ended on and prior to the
Balance Sheet Date.  Since the Balance  Sheet Date,  neither the Company nor any
Subsidiary  has  incurred any  liabilities  for Taxes other than in the ordinary
course of business.  The Company and its Subsidiaries  have withheld all amounts
required  to be  withheld on account of Taxes from  amounts  paid to  employees,
former  employees,  directors,  officers and  residents  and  non-residents  and
remitted or will remit the same to the appropriate  taxing  authority within the
prescribed  time periods.  The Company and its  Subsidiaries  have collected all
sales, use, goods and services or other commodity Taxes required to be collected
and remitted or will remit the same to the appropriate  taxing  authority within
the prescribed time periods.  The Company and its Subsidiaries have delivered to
Omnicom correct and complete copies of all federal, state and foreign income tax
returns filed with respect to the Company and its  Subsidiaries  for all taxable
periods beginning on or after January 1, 1991. The Federal income tax returns of
the  Company  or its  Subsidiaries  have been  audited by the  Internal  Revenue
Service  ("IRS") for all periods  through  1991.  The Company has  delivered  to
Omnicom  true and  complete  copies of all notices of  deficiencies  or proposed
deficiencies and of all audit reports issued to the Company or any Subsidiary by
(a) the IRS for periods  beginning on or after January 1, 1988 and (b) any other
taxing  authority for periods  beginning on or after January 1, 1991.  Except as
disclosed on Schedule 3.11, no examination by any taxing authority of any return
of the Company or any  Subsidiary  is  currently  in  progress,  and neither the
Company nor any Subsidiary has received  written notice of any proposed audit or
examination.  No  deficiency  in the  payment  of  Taxes by the  Company  or any
Subsidiary  for any period has been asserted in writing by any taxing  authority
and remains unsettled at the date of this Agreement. Neither the Company nor any
Subsidiary has made any agreement,  waiver or other arrangement providing for an
extension  of time with  respect  to the  assessment  or  collection  of any Tax
against it or filed a consent with the IRS pursuant to Section  341(f)(2) of the
Code or made an election under Section 338 of the Code.  Neither the Company nor
any Subsidiary is a party to any tax allocation or tax sharing  agreement or has
any contractual  obligation to indemnify any Person with respect to Taxes, other
than agreements or obligations between or among corporations which are currently
members of the affiliated  group of corporations  (as defined in Section 1504 of


                                       14
<PAGE>

the Code) of which the Company is the common parent.  The Company has not been a
United States real property  holding  corporation  within the meaning of Section
897(c)(2) of the Code within the period specified in Section 897(c)(1)(A)(ii) of
the Code. Neither the Company nor any Subsidiary will be required as a result of
a change in  accounting  method for any period  ending on or before the  Closing
Date to include  any  adjustment  under  Section 481 of the Code (or any similar
provision  of state,  local or foreign  income tax law) in income for any period
ending after the Closing Date. Except as set forth on Schedule 3.11, neither the
Company nor any  Subsidiary  is  obligated to make any payments or is a party to
any agreement  that under certain  circumstances  could  obligate it to make any
payments that will not be deductible under Section 280G of the Code.

     Section  3.12  Liabilities.  Except  as set forth on the  Balance  Sheet or
referred to in the footnotes thereto, neither the Company nor any Subsidiary has
any outstanding  claims,  liabilities or  indebtedness of any nature  whatsoever
(collectively in this Section 3.12, "liabilities"), whether accrued, absolute or
contingent, determined or undetermined,  asserted or unasserted, and whether due
or to become due, other than (a) liabilities  disclosed on any Schedule  hereto;
(b)  liabilities  under  Contracts  of the type  required to be disclosed on any
Schedule  but  because  of the  dollar  amount or other  qualifications  are not
required to be listed on such  Schedule  and,  (c)  liabilities  incurred in the
ordinary  course of business and consistent with past practice since the Balance
Sheet Date not involving borrowings by the Company and its Subsidiaries.  Except
as disclosed on Schedule  3.8,  neither the Company nor any  Subsidiary  has any
outstanding  guarantee to any Person with respect to any obligation or liability
of an unrelated third party.  The Company  represents and warrants that no costs
or other  liabilities will be incurred in connection with the  reorganization of
the media  buying  operations  of its  subsidiary  Ketchum  Communications  Inc.
("KCI").

     Section  3.13  Insurance.  Schedule  3.13 is a  schedule  of all  insurance
policies (including life insurance)  currently  maintained by the Company or any
Subsidiary.  All such policies are valid,  outstanding and enforceable  policies
and all premiums  that have become due have been  currently  paid.  None of such
policies  shall lapse or  terminate by reason of the  transactions  contemplated
hereby.  Neither the Company nor any  Subsidiary has received any written notice
of cancellation or written  non-renewal of any such policy.  Neither the Company
nor any  Subsidiary  has  received  written  notice  from  any of its  insurance
carriers that any premiums  will be  materially  increased in the future or that
any  insurance  coverage  listed on Schedule  3.13 will not be  available in the
future on  substantially  the same terms now in  effect.  Except as set forth on
Schedule 3.13,  within the last two years neither the Company nor any Subsidiary
has filed for any claim exceeding $50,000 against any of its insurance policies,
exclusive of automobile policies.

     Section 3.14 Intellectual Properties. The Company and its Subsidiaries have
all right,  title and  interest  in, or a valid and binding  license to use, all
Intellectual Property (as defined below) used in the conduct of their businesses
(except for "off the shelf" computer software programs owned by employees of the
Company  and used on their own  behalf).  Except as set forth on  Schedule  3.10
hereto, no claim of infringement or misappropriation of Intellectual Property is
or has been  pending or, to the best  knowledge,  information  and belief of the
Company,  threatened  against  the  Company or any  Subsidiary  and, to the best
knowledge,  information  and belief of the Company,  neither the Company nor any
Subsidiary is infringing or  misappropriating  any Intellectual  Property of any
other Person.  Except as set forth in Schedule 3.14, neither the Company nor any
Subsidiary has expressly  granted any license,  franchise or permit in effect on
the date hereof to any person or entity to use any  Intellectual  Property owned


                                       15
<PAGE>

by it.  The term  "Intellectual  Property"  means  patents  and  patent  rights,
trademarks and trademark rights,  tradenames and tradename rights, service marks
and service mark rights,  service names and service name rights,  copyrights and
copyright  rights and other  proprietary  intellectual  property  rights and all
pending applications for and registrations of any of the foregoing.

     Section 3.15 Compliance with Laws; Licenses and Permits.

     3.15.1  Compliance.  The  Company  and  its  Subsidiaries  are,  and  their
businesses  have been  conducted,  in compliance  with all  applicable  Laws and
Orders,  except in each case  where the  failure  to so comply  would not have a
Material Adverse Effect,  including without limitation,  (a) all Laws and Orders
promulgated  by the  Federal  Trade  Commission  or any  other  Governmental  or
Regulatory  Authority;  (b) all Environmental  Laws and Orders; and (c) all Laws
and Orders relating to labor, civil rights,  and occupational  safety and health
laws, worker's compensation,  employment and wages, hours and vacations,  or pay
equity. Neither the Company nor any Subsidiary has been charged with, or, to the
best  information,  knowledge and belief of the Company  threatened  with, or is
under any investigation  with respect to, any charge concerning any violation of
any Laws or Orders.

     3.15.2  Licenses.  The  Company  and its  Subsidiaries  have all  licenses,
permits  and  other  governmental  certificates,  authorizations  and  approvals
(collectively  "Licenses")  required by any Governmental or Regulatory Authority
for the  operation  of  their  businesses  and the use of  their  properties  as
presently operated or used, except where the failure to have such Licenses would
not have a Material  Adverse  Effect.  All of the Licenses are in full force and
effect and no action or claim is pending, nor to the best knowledge, information
and  belief of the  Company is  threatened,  to revoke or  terminate  any of the
Licenses or declare any License invalid in any material respect.

     Section 3.16 Client  Relations.  Schedule 3.16.1 sets forth for the Company
and the Subsidiaries  taken as a whole, (a) the twenty largest clients (measured
by commissions  and fees  generated) as at December 31, 1995 and the commissions
and fees from each such client and from all clients (in the  aggregate)  for the
fiscal year ended  December  31, 1995 and (b) the  clients  projected  to be the
twenty largest clients (measured by commissions and fees) based on the Company's
current 1996 profit plan for the fiscal year ending December 31, 1996,  together
with the estimated commissions and fees for each such client and all clients (in
the aggregate) for such fiscal year.  Except as set forth on Schedule 3.16.1, no
current  client  of the  Company  or any  Subsidiary  which  in  1995  generated
commissions  and fees in excess of $100,000 or in 1996 is  estimated to generate
commissions  and fees in excess of  $100,000  has  advised  the  Company  or any
Subsidiary in writing that it is  terminating  or  considering  terminating  the
handling  of its  business by the  Company or any  Subsidiary,  as a whole or in
respect of any material  product,  project or service,  or is planning to reduce
its future  spending with the Company or any Subsidiary in any material  manner,
and to the best knowledge, information and belief of the Company, no such client
has orally advised the Company or any Subsidiary of any of the foregoing events.

     Section 3.17 Accounts  Receivable;  Work-in-Process;  Accounts Payable. The
amount of all  work-in-process,  accounts receivable,  expenditures  billable to
clients  and other  debts due or recorded in the records and books of account of
the Company and the  Subsidiaries  as being due to the Company or any Subsidiary
arose from bona fide transactions in the ordinary course of business and, to the
best  knowledge,  information  and  belief  of the  Company,  will be  good  and
collectible  in full  (less the  amount of any  provision,  reserve  or  similar


                                       16
<PAGE>

adjustment  therefor  made in such records and books of account) in the ordinary
course of business,  and, to the best  knowledge,  information and belief of the
Company, none of such accounts receivable or other debts (or accounts receivable
arising from such  work-in-process) is or will be subject to any counterclaim or
set-off except to the extent of any such provision, reserve or adjustment. There
has been no change  since the  Balance  Sheet Date in the amount or aging of the
work-in-process,  accounts receivable, expenditures billable to clients or other
debts due to the Company or any Subsidiary or the reserves with respect thereto,
or  accounts  payable of the  Company  or any  Subsidiary,  which is  materially
adverse to the  business,  financial  condition or results of  operations of the
Company and its Subsidiaries taken as a whole.

     Section 3.18  Employment  Relations.  Relations (a) Neither the Company nor
any  Subsidiary  is engaged in any unfair  labor  practice;  (b) no unfair labor
practice  complaint  against the Company or any Subsidiary is pending before any
Governmental  or Regulatory  Authority;  (c) there is no organized labor strike,
dispute,  slowdown  or  stoppage  actually  pending  or to the  best  knowledge,
information  and  belief of the  Company  threatened  against or  involving  the
Company or any Subsidiary; (d) there are no labor unions representing or, to the
best knowledge,  information and belief of the Company,  attempting to represent
the  employees of the Company or any  Subsidiary;  (e) no claim or grievance nor
any  arbitration  proceeding  arising out of or under any collective  bargaining
agreement is pending and to the best  knowledge,  information  and belief of the
Company,  no such claim or  grievance  has been  threatened;  (f) no  collective
bargaining  agreement  is  currently  being  negotiated  by the  Company  or any
Subsidiary;  and (g) neither the Company nor any Subsidiary has  experienced any
work stoppage or similar  organized  labor dispute  during the last three years.
There is no legal  action,  suit,  proceeding  or claim  pending or, to the best
knowledge, information and belief of the Company, threatened between the Company
or any Subsidiary and any of their employees,  former employees,  agents, former
agents,  job applicants or any  association or group of any of their  employees,
except as set forth on Schedule 3.10.

                                       17
<PAGE>

     Section 3.19 Employee Benefit Matters.

     3.19.1 List of Plans.  Schedule  3.8 lists all employee  benefit  plans (as
defined in Section 3(3) of the Employee  Retirement Income Security Act of 1974,
as amended  ("ERISA")) and all bonus, stock option,  stock purchase,  restricted
stock, stock appreciation rights, phantom stock rights,  incentive compensation,
deferred   compensation,   retiree  medical  or  life  insurance,   supplemental
retirement,  severance or other benefit plans, programs or arrangements, and all
termination,  severance or contracts or agreements,  whether covering one person
or more than one person,  and whether or not subject to any of the provisions of
ERISA, to which the Company or any Subsidiary is a party,  with respect to which
the  Company  or any  Subsidiary  has any  obligation  or which are  maintained,
contributed  to or sponsored by the Company or any Subsidiary for the benefit of
any  current or former  employee,  officer  or  director  of the  Company or any
Subsidiary (each aforementioned item listed or required to be listed on Schedule
3.8 being referred to herein  individually  as a "Plan" and  collectively as the
"Plans").  The Company has  delivered to Omnicom a complete and accurate copy of
(a) each written Plan and  descriptions  of any unwritten  Plan  (including  all
amendments thereto whether or not such amendments are currently effective),  (b)
each trust  agreement or other  funding  arrangement  with respect to each Plan,
including insurance contracts,  (c) each summary plan description and summary of
material modifications relating to a Plan, (d) the three most recently filed IRS
Form  5500  relating  to  each  Plan,   (e)  the  most  recently   received  IRS
determination  letter for each Plan,  and (f) the three most  recently  prepared
actuarial reports and financial  statements,  if applicable,  in connection with
each Plan.  Except as set forth on  Schedule  3.8,  neither  the Company nor any
Subsidiary has any express or implied commitment, (a) to create, incur liability
with respect to or cause to exist any other  employee  benefit plan,  program or
arrangement,  or (b) to modify,  change or terminate any Plan.  The  information
reported on each such Form 5500 is  accurate  and true.  To the best  knowledge,
information and belief of the Company, no event has occurred or condition exists
that could adversely effect the results  contained in such actuarial reports and
financial  statements.  Such financial statements fairly represent the financial
condition  and  results  of  operations  of each  Plan as of the  dates  of such
statements,  in accordance  with generally  accepted  accounting  principles and
Department of Labor requirements.

     3.19.2  Multi-Employer Plans. Schedule 3.8 includes a complete and accurate
list of each multi-employer plan (within the meaning of Section 3(37) or 4001(a)
(3) of ERISA) (a  "Multi-employer  Plan") and each single employer  pension plan
(within  the  meaning of Section  4001(a)  (15) of ERISA) (a) that is subject to
Sections  4063  and  4064  of  ERISA  (a  "Multiple  Employer  Plan")  which  is
maintained,  contributed  to or  participated  in by the  Company  or any  ERISA
Affiliate, or (b) with respect to which the Company or any ERISA Affiliate,  has
incurred or could incur any liability  under,  arising out of or by operation of
Title IV of ERISA.  Neither the Company nor any ERISA Affiliate has incurred any
liability  (including any contingent or secondary  liability) which has not been
satisfied in full in connection with (i) the full or partial  withdrawal from or
termination of any  Multi-employer  Plan or Multiple  Employer Plan, or (ii) the
reorganization  of any  Multi-employer  Plan,  and no fact or event exists which
could give rise to any such  liability.  For purposes of this Section 3.19,  the
term "ERISA  Affiliate"  means the Company,  each  Subsidiary,  if any, and each
trade or business (whether or not  incorporated)  that is a member of a group of
which the  Company is a member and that is  treated as a single  employer  under
Sections  414(b),  (c),  (m),  (n) or  (o) of the  Code.  The  Company  and  its
Subsidiaries   have  not  maintained,   contributed  to  or  participated  in  a
multi-employer  plan (within the meaning of Section 3(37) or 4001(a)(3) of ERISA
or a multiple employer plan subject to Sections 4063 and 4064 of ERISA) and have


                                       18
<PAGE>

no obligations or liabilities,  including  withdrawal or successor  liabilities,
regarding any such plan.

     3.19.3  Severance.  Except as set forth on Schedule 3.8, none of the Plans,
nor any  employment  agreement  or other  agreement  to which the Company or any
Subsidiary  is a party  or  bound,  provides  for  the  payment  of  separation,
severance,  termination or similar-type  benefits to any Person or obligates the
Company  or  any  Subsidiary  to  pay  separation,   severance,  termination  or
similar-type benefits solely as a result of any transaction contemplated by this
Agreement  or as a result of a "change in  control,"  within the meaning of such
term under section 280G of the Code. None of such Plans or other such agreements
referred to in this Section  3.19.3 are subject to the Laws of any  jurisdiction
outside of the  United  States.  The total  liability  of the  Company to former
shareholders  under paragraph 9 of the shareholder  agreements to which is was a
party,  or under any agreements  entered into in settlement of such  contractual
rights, shall not exceed $5,278,000.

     3.19.4 Welfare  Benefit Plans.  Schedule 3.8 also sets forth a complete and
accurate  list  of  each  Plan  which  provides  or  promises  retiree  medical,
disability or life insurance benefits to any current or former employee, officer
or director of the Company.  Except as set forth on Schedule  3.19,  the Company
has  expressly  reserved the right,  in all Plan  documents  relating to welfare
benefits provided to employees, former employees,  officers, directors and other
participants and  beneficiaries,  to amend,  modify or terminate at any time the
Plans which  provide for  welfare  benefits  and the Company is not aware of any
fact, event or condition that could reasonably be expected to restrict or impair
such right.

     3.19.5 Administrative Compliance. Each Plan is now and has been operated in
all material respects in accordance with the requirements of all applicable law,
including,  without  limitation,  ERISA and the Code,  and the  regulations  and
authorities  published  thereunder.  The Company and the Subsidiaries  have each
performed all material  obligations required to be performed by it under, is not
in any  respect in default  under or in  violation  of, and the  Company  has no
knowledge of any default or  violation by any party to, any Plan.  Except as set
forth on Schedule 3.10, no legal action, suit, audit,  investigation or claim is
pending  or to the  best  knowledge,  information  and  belief  of  the  Company
threatened,  with  respect to any Plan (other  than  claims for  benefits in the
ordinary  course)  and,  to the best  knowledge,  information  and belief of the
Company,  and except as set forth on Schedule 3.19, no fact,  event or condition
exists that could give rise to any such action,  suit,  audit,  investigation or
claim. All reports, disclosures,  notices and filings with respect to such Plans
required to be made to employees, participants,  beneficiaries, alternate payees
and Governmental or Regulatory Authorities have been timely made or an extension
has been timely obtained.

     3.19.6  Tax-Qualification.  Except as set forth on Schedule 3.19, each Plan
which is intended to be qualified  under Section 401(a) of the Code has received
a favorable  determination  letter from the IRS that it is so qualified and each
trust  established  in  connection  with any Plan which is intended to be exempt
from federal  income  taxation  under section  501(a) of the Code has received a
determination  letter  from  the  IRS  that  it is so  exempt,  and to the  best
knowledge,  information and belief of the Company, no fact or event has occurred
or  condition  exists since the date of such  determination  letter from the IRS
which could adversely affect the qualified status of any such Plan or the exempt
status of any such trust.



                                       19
<PAGE>

     3.19.7 Funding;  Excise Taxes.  Except as set forth on Schedule 3.19, there
has been no prohibited  transaction  (within the meaning of Section 406 of ERISA
or Section 4975 of the Code) with respect to any Plan subject to ERISA.  Neither
the Company nor any  Subsidiary  has incurred any  liability  for any excise tax
arising under Sections 4971, 4972, 4975, 4976, 4977, 4978, 4978B,  4979, 4980 or
4980B of the Code or any civil penalty  arising under Sections  502(i) or 502(l)
of ERISA, and, to the best knowledge,  information and belief of the Company, no
fact,  event or condition  exists  which could give rise to any such  liability.
Neither the Company nor any ERISA  Affiliate has incurred any  liability  under,
arising out of or by operation of Title IV of ERISA  (other than  liability  for
premiums to the Pension Benefit  Guaranty  Corporation  ("PBGC")  arising in the
ordinary course),  including,  without  limitation,  any liability in connection
with the  termination of any employee  benefit plan subject to Title IV of ERISA
(a "Title IV Plan");  and, no fact,  event or condition  exists which could give
rise to any such liability. Except as set forth on Schedule 3.19, no complete or
partial termination has occurred within the five years preceding the date hereof
with respect to any Plan maintained by the Company or any ERISA  Affiliate,  and
no  reportable  event  (within the meaning of Section 4043 of ERISA),  notice of
which has not been waived by the PBGC, has occurred or is expected to occur with
respect to any Plan maintained by the Company or any ERISA  Affiliate.  No Title
IV Plan  maintained  by the Company or any ERISA  Affiliate  had an  accumulated
funding deficiency (within the meaning of Section 302 of ERISA or Section 412 of
the Code),  whether or not waived,  as of the most  recently  ended plan year of
such Plan.  None of the  assets of the  Company  or any ERISA  Affiliate  is the
subject of any Lien arising under Section  302(f) of ERISA or Section  412(n) of
the Code;  neither the Company nor any ERISA Affiliate has been required to post
any security  under Section 307 of ERISA or Section 401(a) (29) of the Code; and
to the best knowledge,  information and belief of the Company,  no fact or event
exists  which could give rise to any such Lien or  requirement  to post any such
security.  As of the Closing Date, no Plan which is a Title IV Plan will have an
"unfunded  benefit  liability"  (within  the meaning of Section  4001(a)(18)  of
ERISA).

     3.19.8 Tax Deductions. All contributions,  premiums or payments required to
be made,  paid or  accrued  with  respect  to any Plan have been  made,  paid or
accrued on or before their due dates,  including  extensions  thereof.  All such
contributions  have been fully  deducted  for income  tax  purposes  and no such
deduction has been challenged or disallowed by any government  entity and to the
best knowledge,  information and belief of the Company,  no fact or event exists
which could give rise to any such challenge or disallowance.

     Section 3.20 Interests in Customers, Suppliers, Etc. Except as set forth on
Schedule 3.20, to the best knowledge,  information and belief of the Company, no
officer,  director, or employee of the Company or any Subsidiary, or the parent,
brother,  sister,  child or spouse of any such  officer,  director  or  employee
(collectively,  the "Related Group"),  or any entity controlled by anyone in the
Related Group:

          (a) owns, directly or indirectly, any interest in (excepting less than
     1/4 of 1% stock holdings for investment  purposes in securities of publicly
     held and traded  companies),  or has any right to receive payments from, or
     is an officer, director, employee or consultant of, any Person which is, or
     is  engaged  in  business  as,  a  competitor,  lessor,  lessee,  supplier,
     distributor,  sales  agent,  customer  or  client  of  the  Company  or any
     Subsidiary;



                                       20
<PAGE>

          (b) owns,  directly or indirectly (other than through the ownership of
     stock or other securities of the Company or any Subsidiary), in whole or in
     part,  any  tangible  or  intangible  property,  that  the  Company  or any
     Subsidiary uses in the conduct of its business; or

          (c) has any cause of action or other claim whatsoever against, or owes
     any  amount to the  Company  or any  Subsidiary,  except  for claims in the
     ordinary  course of business  such as for  accrued  vacation  pay,  accrued
     benefits under employee  benefit plans,  and similar matters and agreements
     existing on the date hereof.

     Section 3.21 Bank  Accounts  and Powers of Attorney.  Set forth in Schedule
3.21 is an accurate and complete list showing (a) the name of each bank in which
the Company and its  Subsidiaries  have an account,  credit line or safe deposit
box and the names of all persons  authorized  to draw  thereon or to have access
thereto,  and (b) the names of all persons,  if any,  holding powers of attorney
from the  Company  and its  Subsidiaries  and a summary  statement  of the terms
thereof.

     Section 3.22  Compensation  of  Employees.  Set forth in Schedule 3.22 is a
complete  list showing the names and  positions of all  salaried  employees  and
exclusive  consultants who are currently being compensated in the aggregate from
the  Company  or any  Subsidiary  at an  annualized  rate of  $100,000  or more,
together with a statement of the current annual salary,  the bonus  compensation
paid or payable with respect to the fiscal year ended  December 31, 1995 and the
material  fringe  benefits  of such  employees  and  exclusive  consultants  not
generally  available  to all  employees  of the  Company  and its  Subsidiaries.
Schedule 3.22 also sets forth a complete list showing (a) all bonus compensation
paid or payable in the aggregate (whether by agreement, custom or understanding)
to any  salaried  employees  of the Company and its  Subsidiaries  for  services
rendered  during the fiscal year ended  December 31, 1995,  (b) the names of all
retired employees,  if any, of the Company or its Subsidiaries who are receiving
or entitled to receive any healthcare or life insurance benefits or any payments
from the Company and its  Subsidiaries  not covered by any pension plan to which
the Company or its  Subsidiaries  are a party,  their ages and current  unfunded
pension rate, if any, and (c) a description of the normal severance  benefits of
the Company and each Subsidiary.

     Section  3.23 No Changes  Since the Balance  Sheet Date.  Since the Balance
Sheet Date, except as specifically stated on Schedule 3.23 or as contemplated or
otherwise  permitted under the terms of this Agreement,  neither the Company nor
any  Subsidiary  has (a) permitted any of its assets to be subjected to any Lien
other than a Permitted Lien, (b) sold,  transferred or otherwise disposed of any
assets or properties  except in the ordinary course of business and which had an
aggregate  value of less  than  $25,000,  (c) made any  capital  expenditure  or
commitment  therefor which  individually or in the aggregate  exceeded $100,000,
(d)  declared  or paid or set  aside  for  payment  any  dividends  or made  any
distribution  on any shares of its capital  stock,  or  redeemed,  purchased  or
otherwise  acquired  any shares of its capital  stock or any option,  warrant or
other right to purchase or acquire  any such  shares,  (e) paid or incurred  any
obligation  to pay any  bonuses to  employees  other than as accrued  for on the
Balance Sheet,  (f) increased or prepaid its  indebtedness  for borrowed  money,
except current  borrowings in the ordinary course of business under credit lines
disclosed on the Balance Sheet, or made any loan to any Person other than to any
employee  for normal  travel  and  expense  advances  or  relocation  allowances
consistent   with   past   practice,   (g)   written   down  the  value  of  any
work-in-process,   or  written  off  as  uncollectible  any  notes  or  accounts
receivable,  except  write-downs  and  write-offs  in  the  ordinary  course  of


                                       21
<PAGE>

business,  none of which  individually  or in the aggregate,  is material to the
Company and its  Subsidiaries  taken as a whole (h) granted any  increase in the
rate of wages,  salaries,  bonuses or other  remuneration  of any employee  who,
whether  as a result  of such  increase  or prior  thereto,  receives  aggregate
compensation from the Company or any Subsidiary at an annual rate of $100,000 or
more, or entered into any employment  agreement which is not cancelable  without
penalty or financial  obligation within 30 days and which has total compensation
of more than $300,000 over the term thereof, or except in the ordinary course of
business to any other employees,  (i) canceled or waived any claims or rights of
substantial  value,  (j)  made any  change  in any  method  of  accounting,  (k)
otherwise conducted its business or entered into any transaction,  except in the
usual and  ordinary  manner  and in the  ordinary  course of its  business,  (l)
amended in any material respect or terminated any agreement which is material to
its  business,  (m) renewed,  extended or modified in any  material  respect any
lease of real property or except in the ordinary course of business any lease of
personal  property,  (n) adopted,  amended in any material respect or terminated
any Plan, or (o) agreed, whether or not in writing, to do any of the foregoing.

     Section 3.24 Vote Required.  Pursuant to Pennsylvania law and the condition
to Omnicom's  obligation  to  consummate  the Merger as set forth in Section 8.6
below, (a) the affirmative votes of the holders of record of at least a majority
of the outstanding shares of Company Common Stock, voting as a class, and of the
sole holder of record of all of the Company Preferred Stock,  voting as a class,
with respect to the adoption of this  Agreement,(b)  the affirmative vote of the
Trustee of the Company  401(k) Profit  Sharing Plan (the "Profit  Sharing Plan")
with  respect to all shares of Company  Common Stock owned by it with respect to
the adoption of this Agreement, and (c) the affirmative vote of the holders of a
majority of the voting power  represented by the  outstanding  shares of Company
Common Stock and Company  Preferred  Stock,  voting  together as a single class,
with respect to the adoption of the Escrow  Agreement and the appointment of the
Shareholder  Representative,  are the only votes of the  holders of any class or
series of any class of the capital  stock of the  Company  required to adopt the
Agreement and approve the Merger and the other transactions contemplated hereby.

     Section 3.25 Corporate  Controls.  To the best  knowledge,  information and
belief of the Company,  neither the Company,  any  Subsidiary  nor any director,
officer,  agent,  employee or other  Person  associated  with or while acting on
behalf of the Company or any Subsidiary,  has, directly or indirectly:  used any
corporate fund for unlawful  contributions,  gifts,  or other unlawful  expenses
relating to political activity; made any unlawful payment to foreign or domestic
government officials or employees or to foreign or domestic political parties or
campaigns  from  corporate  funds;  established  or  maintained  any unlawful or
unrecorded  fund of  corporate  monies  or  other  assets;  made  any  false  or
fictitious  entry on its  books or  records;  made any  bribe,  rebate,  payoff,
influence payment,  kickback,  or other unlawful payment,  or other payment of a
similar  or  comparable  nature,  to any  Person or  entity,  private or public,
regardless of form, whether in money, property, or services, to obtain favorable
treatment in securing business or to obtain special  concessions,  or to pay for
favorable  treatment  for business  secured or for special  concessions  already
obtained,  and neither the Company nor any  Subsidiary has  participated  in any
boycott or other  similar  practices  affecting  any of its actual or  potential
customers.

     Section 3.26 Information  Supplied.  None of the information supplied or to
be  supplied  by the  Company  for  inclusion  in  either  (i) the  registration
statement on Form S-4 to be filed with the SEC by Omnicom in connection with the
issuance of Omnicom Stock under this Agreement (the "Registration Statement") or
(ii) the  information  statement  relating to the Special  Meeting to be held in


                                       22
<PAGE>

connection  with this Agreement and the  transactions  contemplated  hereby (the
"Information  Statement"),  contains any untrue  statement of a material fact or
omits to state any material fact  required to be stated  therein or necessary in
order to make the statements  therein, in light of the circumstances under which
they were made, not misleading,  or will, at the time the Registration Statement
becomes  effective  under  the  Securities  Act  and at the  date on  which  the
Information Statement is mailed to the Company Shareholders,  contain any untrue
statement of a material  fact or omit to state any material  fact required to be
stated therein or necessary to make the statements therein not misleading.

     Section  3.27  Brokers.  Except as set forth on Schedule  3.27,  no broker,
finder,  agent or  similar  intermediary  has acted on behalf of the  Company in
connection  with this Agreement or the  transactions  contemplated  hereby,  and
except as set forth on Schedule 3.27 no brokerage commissions,  finder's fees or
similar  fees or  commissions  are payable by the Company or any  Subsidiary  in
connection  therewith based on any agreement,  arrangement or understanding with
any of them.

     Section 3.28. Transaction Costs. The legal, accounting,  other professional
fees  and  expenses,  including  the  fees and  expenses  of Ad Media  Corporate
Advisors,  Inc.,  incurred or to be incurred by the Company and the Subsidiaries
in connection  with this  Agreement and the  transactions  contemplated  hereby,
including  without  limitation the  preparation  of the Prospectus  Materials as
provided in Section 7.1 and the transactions contemplated thereby (collectively,
the "Transaction Costs") will not exceed $1,500,000.

     Section 3.29 Accounting  Matters.  To the best  knowledge,  information and
belief of the Company,  neither the Company nor any of its  affiliates has taken
or agreed to take any action which would prevent Omnicom from accounting for the
business combination to be effected by the Merger as a pooling-of-interests.

     Section 3.30 Copies of Documents;  Schedules.  The Company has caused to be
made  available  for  inspection  and  copying by Omnicom  and OmniSub and their
advisers, true, complete and correct copies of all documents referred to in this
Article  III or in any Annex or  Schedule.  The  Schedules  referred  to in this
Article  III have been  previously  delivered  to  Omnicom  and  OmniSub  by the
Company.


                                   ARTICLE IV

                     REPRESENTATIONS OF OMNICOM AND OMNISUB

     Omnicom and OmniSub,  jointly and  severally,  represent and warrant to the
Company as follows:

     Section 4.1 Existence  and Good  Standing.  Omnicom is a  corporation  duly
organized,  validly existing and in good standing under the laws of the State of
New York.  OmniSub is a corporation  duly organized and validly existing and for
which  no  Articles  of  Dissolution  have  been  filed  under  the  laws of the
Commonwealth  of  Pennsylvania.  Each of Omnicom and  OmniSub has all  requisite
corporate  power and authority to own its assets and to carry on its business as
presently conducted.

                                       23
<PAGE>

     Section  4.2  Execution  and  Validity of  Agreements.  Each of Omnicom and
OmniSub has the full corporate power and authority to enter into this Agreement,
to  perform  its  respective   obligations   hereunder  and  to  consummate  the
transactions  contemplated  hereby.  The execution,  delivery and performance of
this Agreement by Omnicom and OmniSub and the  consummation of the  transactions
contemplated  hereby  have  been duly and  validly  authorized  by all  required
corporate action on behalf of Omnicom and OmniSub.  This Agreement has been duly
and validly  executed and  delivered  by Omnicom and OmniSub  and,  assuming due
authorization,  execution  and delivery by the Company,  constitutes  the legal,
valid and binding obligation of Omnicom and OmniSub, enforceable against each of
them in accordance with its terms.

     Section 4.3 Non-Contravention; Approvals and Consents.

     4.3.1 Non-Contravention. The execution, delivery and performance by Omnicom
and  OmniSub  of  their  obligations  hereunder  and  the  consummation  of  the
transactions  contemplated  hereby will not conflict with, result in a violation
or breach of,  constitute  (with or  without  notice or lapse of time or both) a
default  under,  result  in or  give to any  Person  any  right  of  payment  or
reimbursement,  termination,  cancellation,  modification or acceleration of, or
result in the  creation  or  imposition  of any Lien  upon any of the  assets or
properties  of  Omnicom  or  OmniSub  under,  any of the  terms,  conditions  or
provisions of (a) the  certificate  or articles of  incorporation  or by-laws of
Omnicom or OmniSub,  or (b) subject to the taking of the  actions  described  in
Section  4.3.2,  (i) any  Laws  or  Orders  of any  Governmental  or  Regulatory
Authority  applicable to Omnicom or OmniSub or any of their respective assets or
properties,  or (ii) any  Contract to which  Omnicom or OmniSub is a party or by
which  Omnicom or OmniSub or any of their  respective  assets or  properties  is
bound.

     4.3.2  Approvals  and  Consents.  Except (a) for the filing of a pre-merger
notification  report  by  Omnicom  under  HSR  Act,  (b) for the  filing  of the
Information  Statement and  Registration  Statement with the SEC pursuant to the
Exchange Act and the Securities Act, the declaration of the effectiveness of the
Registration  Statement by the SEC and any filings with various state securities
authorities that are required in connection with the  transactions  contemplated
by this  Agreement,  (c) for the  filing of the  Articles  of  Merger  and other
appropriate  merger  documents  required  by  the  PBCL  with  the  Pennsylvania
Department of State and appropriate  documents with the relevant  authorities of
other  states in which the Company  and/or  OmniSub is qualified to do business,
and (d) as  disclosed  on Schedule  4.3.2,  no  consent,  approval or action of,
filing  with or notice to any  Governmental  or  Regulatory  Authority  or other
public or private  third party is necessary or required  under any of the terms,
conditions or provisions of any Law or Order of any  Governmental  or Regulatory
Authority  or any  Contract  to which  Omnicom or OmniSub is a party or by which
Omnicom or OmniSub or any of their respective  assets or properties is bound for
the  execution  and  delivery  of this  Agreement  by  Omnicom or  OmniSub,  the
performance by Omnicom and OmniSub of their respective  obligations hereunder or
the consummation of the transactions contemplated hereby.

     Section 4.4 Omnicom  Stock.  The shares of Omnicom Stock to be delivered to
the holders of the Company Stock pursuant to this  Agreement,  when delivered as
provided herein,  will be validly issued and outstanding shares of voting common
stock of  Omnicom,  fully  paid and  non-assessable,  and will not be subject to
preemptive  rights of any Person.  The Omnicom Stock to be so delivered  will be


                                       24
<PAGE>

registered under the  Registration  Statement and duly listed for trading on the
New York Stock Exchange as of the Closing Date.

     Section  4.5  Financial  Statements  and No Material  Changes.  Omnicom has
previously  furnished  to the  Company  true and  complete  copies of its Annual
Reports on Form 10-K for the three  fiscal years ended  December 31, 1992,  1993
and 1994,  as amended by the Reports on Form 10-K/A filed in respect of the 1992
and 1993 Annual Reports,  and complete  copies of its Quarterly  Reports on Form
10-Q for the three  quarters  ended March 31, June 30 and  September  30,  1995.
Since  September  30,  1995,  there has been no material  adverse  change in the
assets or liabilities, or in the business or condition,  financial or otherwise,
or the results of consolidated operations of Omnicom and its subsidiaries. Since
December 31, 1992,  Omnicom has filed all forms,  reports and documents with the
SEC required to be filed by it pursuant to the federal  securities  laws and the
SEC rules and regulations thereunder (the "SEC Reports"),  all of which complied
in all material respects with the applicable  requirements of the Securities Act
and the Exchange  Act.  None of the SEC  Reports,  at the time filed (and in the
case of the 1992  and 1993  Annual  Reports  on Form  10-K,  as  amended  by the
applicable  Form 10-K/A)  contained any untrue  statement of a material fact, or
omitted to state a material fact  required to be stated  therein or necessary to
make the statements  therein,  in light of the  circumstances in which they were
made,  or in which they will be made,  not  misleading.  The  audited  financial
statements  included in such SEC Reports have been prepared in  accordance  with
GAAP  applied on a  consistent  basis  (except as stated  therein)  and  present
fairly, in all material respects, the consolidated financial position of Omnicom
and its  subsidiaries as of the respective  dates thereof,  and the consolidated
results of operations and cash flows for each of the periods then ended.

     Section 4.6 Litigation.  There is no action, suit,  proceeding at law or in
equity  by  any  Person,  or any  arbitration  or any  administrative  or  other
proceeding  by or before (or to the best  knowledge,  information  and belief of
Omnicom and OmniSub,  any  investigation  by), any  Governmental  or  Regulatory
Authority, pending or, to the best knowledge,  information and belief of Omnicom
and  OmniSub,  threatened  against  Omnicom  or  OmniSub  with  respect  to this
Agreement  or the  transactions  contemplated  hereby,  or against or  affecting
Omnicom or any of its  subsidiaries or any of their  properties or rights which,
if  adversely  determined,  would be  reasonably  likely to have a material  and
adverse  effect on the  financial  condition,  results  of  operations,  assets,
properties or businesses of Omnicom and its subsidiaries taken as a whole.

     Section 4.7 Brokers. No broker,  finder,  agent or similar intermediary has
acted on behalf of Omnicom or OmniSub or their  affiliates  in  connection  with
this  Agreement  or the  transactions  contemplated  hereby,  and  no  brokerage
commissions, finder's fees or similar fees or commissions are payable by Omnicom
or  OmniSub in  connection  therewith  based on any  agreement,  arrangement  or
understanding with any of them.

     Section 4.8 Information Supplied. None of the information supplied or to be
supplied by Omnicom for  inclusion in either (a) the  Registration  Statement or
(b) the Information Statement,  contains any untrue statement of a material fact
or omits to state any material fact  required to be stated  therein or necessary
in order to make the statements  therein,  in light of the  circumstances  under
which they were made,  not  misleading,  or will,  at the time the  Registration
Statement  becomes  effective  under the Securities Act and at the date on which
the  Information  Statement is mailed to the Company  Shareholders,  contain any
untrue  statement of a material fact or omit to state any material fact required
to be stated therein or necessary to make the statements therein not misleading.


                                       25
<PAGE>

The Registration  Statement will comply as to form in all material respects with
the provisions of the Securities Act and the rules and  regulations  promulgated
thereunder.

     Section  4.9  OmniSub.  OmniSub  was formed  solely for the  purpose of the
Merger and  engaging in the  transactions  contemplated  hereby.  As of the date
hereof  and the  Effective  Time,  the  capital  stock of OmniSub is and will be
directly owned 100% by Omnicom. Further, there are not as of the date hereof and
there will not be at the Effective Time any  outstanding or authorized  options,
warrants,  calls, rights,  commitments or any other agreements requiring OmniSub
to issue,  transfer,  sell,  purchase,  redeem or acquire  any shares of capital
stock. As of the date hereof and the Effective  Time,  except for obligations or
liabilities  incurred in connection with its  incorporation  or organization and
the  transactions  contemplated  hereby,  OmniSub  has not  and  will  not  have
incurred,  directly or  indirectly  through any  subsidiary  or  affiliate,  any
obligations  or liabilities or engaged in any business or activities of any type
of kind  whatsoever  or entered into any  agreements  or  arrangements  with any
person or entity.

     Section  4.10 Copies of  Documents;  Schedules.  Omnicom  and OmniSub  have
caused to be made  available for  inspection  and copying by the Company and its
advisers,  complete  and  correct  copies of all  documents  referred to in this
Article IV or in any Schedule. The Schedules referred to in this Article IV have
been previously delivered to the Company by Omnicom or OmniSub.


                                    ARTICLE V

                            COVENANTS OF THE COMPANY

     The Company  covenants  and agrees with  Omnicom and OmniSub  that,  at all
times from and after the  Execution  Date until the  Closing,  the Company  will
comply with all covenants and provisions of this Article V, except to the extent
Omnicom (on behalf of itself and OmniSub) may otherwise consent in writing.

     Section 5.1 Regulatory and Other  Approvals.  The Company will (a) take all
commercially reasonable steps necessary or desirable, and proceed diligently and
in good  faith and use all  commercially  reasonable  efforts,  as  promptly  as
practicable to obtain all consents, approvals or actions of, to make all filings
with and to give all notices to  Governmental  or Regulatory  Authorities or any
other Person required of the Company to consummate the transactions contemplated
hereby  including  without  limitation  those described on Schedule  3.9.2,  (b)
provide  such other  information  and  communications  to such  Governmental  or
Regulatory  Authorities  or other  Persons as such  Governmental  or  Regulatory
Authorities or other Persons may reasonably request in connection  therewith and
(c) provide  reasonable  cooperation  to Omnicom and  OmniSub in  obtaining  all
consents,  approvals  or  actions  of,  making all  filings  with and giving all
notices to Governmental or Regulatory  Authorities or other Persons  required of
Omnicom or OmniSub to consummate the transactions contemplated hereby, including
without  limitation  complying,  if necessary,  with the Workers  Adjustment and
Retraining  Notification  Act (P.L.  100-379).  The Company will provide  prompt
notification  to Omnicom  when any such  consent,  approval,  action,  filing or
notice  referred to in clause (a) above is obtained,  taken,  made or given,  as
applicable, and will advise Omnicom of any communications (and, unless precluded
by law, provide copies of any such  communications that are in writing) with any


                                       26
<PAGE>

Governmental  or  Regulatory  Authority  or other  Person  regarding  any of the
transactions contemplated by this Agreement.

     Section 5.2 HSR Filings.  In addition to and without limiting the covenants
contained  in Section  5.1,  the  Company  will (a) take  promptly  all  actions
necessary  to make the filings  required of the Company  under the HSR Act,  (b)
comply  at the  earliest  practicable  date  with  any  request  for  additional
information  received by the Company from the Federal  Trade  Commission  or the
Antitrust  Division of the Department of Justice pursuant to the HSR Act and (c)
cooperate with Omnicom in connection with Omnicom's filing under the HSR Act and
in connection with resolving any  investigation or other inquiry  concerning the
transactions  contemplated  by this  Agreement  commenced  by either the Federal
Trade Commission or the Antitrust Division of the Department of Justice or state
attorneys general.

     Section 5.3 Full Access.  The Company will (a) provide  Omnicom and OmniSub
and  their  respective  officers,  employees,  counsel,  accountants,  financial
advisors, consultants and other representatives (collectively,  "Advisors") with
full access,  upon reasonable  prior notice and during normal business hours, to
the  executive  officers  and  agents  of the  Company  who  have  any  material
responsibility  for  the  conduct  of  the  business  of  the  Company  and  its
Subsidiaries,  to the Company's  accountants and their work papers,  but only to
the extent that such access does not unreasonably interfere with the business of
the  Company  and its  Subsidiaries  and (b)  furnish  Omnicom,  OmniSub and the
Advisors with all such  information  and data concerning the Company as Omnicom,
OmniSub  or  the  Advisors  reasonably  may  request  in  connection  with  such
investigation, except to the extent that furnishing any such information or data
would violate any Law, Order,  Contract or License  applicable to the Company or
any Subsidiary.

     Section 5.4 No Solicitations. The Company will not take, nor will it permit
any affiliate (or authorize or permit any investment banker,  financial advisor,
attorney,  accountant or other Person  retained by or acting for or on behalf of
it or any such  affiliate)  to take,  directly  or  indirectly,  any  action  to
solicit,   encourage,   receive,   negotiate,  assist  or  otherwise  facilitate
(including by furnishing  confidential  information with respect to the Company)
any offer or inquiry  concerning the  acquisition of the Company from any Person
(a  "Potential  Acquiror")  other  than  Omnicom  or  OmniSub  (an  "Acquisition
Proposal"). The Company shall promptly inform Omnicom, orally and in writing, of
the  material  terms and  conditions  of any proposal or offer for, or which may
reasonably be expected to lead to, an Acquisition  Proposal that it receives and
the identity of the Potential Acquiror.  The Company shall immediately cease any
existing  activities,  discussions or negotiations with any parties with respect
to any Acquisition Proposal.

     Section 5.5 Conduct of  Business.  From the  Execution  Date to the Closing
Date,  except as  contemplated  or otherwise  permitted  under the terms of this
Agreement,  the  Company  will  operate  the  business  of the  Company  and the
Subsidiaries only in the ordinary course consistent with past practice.  Without
limiting the generality of the foregoing, except as required by Section 5.12 and
as contemplated by or otherwise  permitted by the terms of this Agreement or any
Schedule  hereto,  the Company will refrain,  and will cause its Subsidiaries to
refrain, from taking any of the following actions unless consented to in writing
by  Omnicom  (on  behalf of itself  and  OmniSub),  which  consent  shall not be
unreasonably withheld:

          (a) selling,  leasing or otherwise  disposing of all or a  substantial
     part of its assets or business;



                                       27
<PAGE>

          (b) amending its Articles of  Incorporation  or By-laws (or equivalent
     charter documents);

          (c) changing its equity capitalization;

          (d) engaging in any  acquisition  of the stock,  assets or business of
     another  corporation or entity or making any equity investment of corporate
     funds in another corporation or entity other than short-term investments in
     cash equivalents;

          (e) merging or consolidating  with and into any  corporation,  limited
     liability  company  or  other  entity,  or  merging  or  consolidating  any
     corporation, limited liability company or other entity with and into it;

          (f) engaging in any liquidation or dissolution;

          (g)  engaging  in any  transaction  involving  an  amount in excess of
     $100,000,  other than in the  ordinary  course of  business  to service its
     clients;

          (h)  engaging  in the  issuance  or sale of  stock or  securities,  or
     options, warrants or obligations convertible into such stock or securities,
     or  issuing  any  phantom  stock,   equity   participation   units,   stock
     appreciation rights or similar rights;

          (i) entering into any new line of business;

          (j)  prepaying  any  indebtedness  for  borrowed  money;  creating  or
     modifying any of the terms of any of the following financial  arrangements:
     any Lien on any of its assets or  properties  other than a Permitted  Lien;
     any  guarantee  by it of the  obligations  of any  third  party,  whether a
     director,  officer  or  employee  of  the  Company  or any  Subsidiary,  or
     otherwise;  and any  indebtedness for borrowed money except in the ordinary
     course of its business under credit lines set forth on Schedule 3.8;

          (k) entering  into any  arrangement  with any  employee or  consultant
     pursuant  to which the  compensation  or fee  payable to such  employee  or
     consultant shall wholly or partially be contingent upon (a) a percentage of
     its revenues or the revenues generated by it relating to any of its clients
     or (b) its profits,  except for renewals in the ordinary course of business
     and consistent with past practice of outstanding arrangements of such type;

          (l) making any loans to any  employee  other  than  normal  travel and
     expense  advances or relocation  allowances,  in each case  consistent with
     past practices, or to any other Person;

          (m) except as  disclosed  in Schedule  3.8 hereto,  entering  into any
     lease,  or  purchase of real  property  or  commitment  to  construct  real
     property;

          (n) granting any compensation  increase to any existing employee whose
     total annual compensation would after such increase exceed $100,000; paying
     bonuses to any existing  employees  except to the extent accrued for on the
     Balance  Sheet;  or entering  into any  employment  agreement  which is not


                                       28
<PAGE>

     cancelable without penalty or financial obligation within 30 days and which
     has total compensation of more than $300,000 over the term thereof;

          (o)  entering  into any  contract  or  agreement  with any  officer or
     director;

          (p) entering into any  affiliation  arrangement  with any  advertising
     agency, other than Omnicom or any affiliate thereof;

          (q)  declaring or paying any dividends to its  stockholders  or making
     other distributions in respect of its capital stock,  splitting,  combining
     or  reclassifying  any of its capital  stock,  or issuing or authorizing or
     proposing  the issuance of any other  securities in respect of, in lieu of,
     or in  substitution  for,  shares of its capital  stock;  or  repurchasing,
     redeeming or otherwise acquiring any of its shares of capital stock;

          (r)  amending  in any  material  respect  any  contract  or  agreement
     material to its business;

          (s)  entering  into any  severance  agreement  involving  a payment or
     obligation to pay any amount in excess of the normal  severance  benefit of
     the Company or the applicable Subsidiary,  as the case may be, as set forth
     on Schedule 3.22;

          (t) releasing,  canceling or assigning any  indebtedness  for borrowed
     money owed to it, or waiving any material right relating to its properties;

          (u) accepting as a client any Person that the President of Omnicom, in
     his reasonable discretion,  determines to be contrary to the best interests
     of Omnicom and its subsidiaries;

          (v) creating or modifying any Plan or increasing  the fringe  benefits
     of any director or officer;

          (w) entering into any transaction or performing any act which would be
     reasonably likely to result in any of the representations and warranties of
     the Company  contained in this  Agreement not being true and correct in any
     material  respect;  or  agreeing  to  take  any of  the  actions  that  are
     prohibited  herein or which  would  constitute  a  violation  of any of the
     covenants of the Company contained herein; and

          (x)  delegating  to directors or officers the power to take any of the
     actions prohibited by any of the foregoing clauses.

     Section 5.6 Financial Information.  Within 10 business days after the close
of each month between the Execution Date and the Closing Date, the Company shall
furnish to Omnicom the unaudited  consolidated balance sheets of the Company and
its  subsidiaries,  as at the close of such month, and the related  consolidated
statements  of income and (with  respect to quarterly  consolidated  statements)
cash flows for the period then ended and the fiscal year-to-date.  The unaudited
financial  statements  referred  to in this  Section  5.6 shall be  prepared  in
accordance  with GAAP applied on a consistent  basis with the audited  financial
statements  provided  to Omnicom  and  OmniSub  pursuant  to Section  3.4 above,
provided that such financial statements shall not contain footnotes and shall be
subject to normal year-end adjustments and accruals.



                                       29
<PAGE>

     Section 5.7 Notice and Cure. The Company will notify Omnicom in writing of,
and contemporaneously  will provide Omnicom with true and complete copies of any
and all  information  or documents  relating  to, and will use all  commercially
reasonable  efforts  to cure  before the  Closing,  any  event,  transaction  or
circumstance,  as soon as  practicable  after it becomes  known to the  Company,
occurring  after the  Execution  Date that causes or will cause any  covenant or
agreement of the Company under this  Agreement to be breached or that renders or
will render untrue in any material respect any representation or warranty of the
Company  contained  in this  Agreement  as if the same were made on or as of the
date of such event,  transaction or  circumstance.  The Company also will notify
Omnicom in writing of, and will use all commercially reasonable efforts to cure,
before the Closing,  any other violation or breach, as soon as practicable after
it becomes known to the Company,  of any representation,  warranty,  covenant or
agreement  made by the Company in this  Agreement.  No notice given  pursuant to
this Section shall have any effect on the representations, warranties, covenants
or  agreements   contained  in  this   Agreement  for  purposes  of  determining
satisfaction  of any  condition  contained  herein  or  shall  in any way  limit
Omnicom's right to seek indemnity under Article XI.

     Section 5.8 Consultation.  Between the Execution Date and the Closing Date,
the Company will consult with management of Omnicom and the  Diversified  Agency
Services  Division of Omnicom with a view to informing such management as to the
operation and management of the Company and the  Subsidiaries.  The Company will
use commercially reasonable efforts to preserve the business organization of the
Company and the Subsidiaries,  to preserve the present business relationships of
the  Company  and the  Subsidiaries,  and to  preserve  all of the  confidential
information and trade and business secrets of the Company and the Subsidiaries.

     Section  5.9  Company  Shareholders'  Approval.  Within five days after the
Registration  Statement becomes effective,  the Company shall give notice to the
holders  of  Company  Stock as of a record  date not less than ten days nor more
than twenty days prior to such mailing (the "Voting  Shareholders") of a special
meeting of its stockholders (the "Special  Meeting") to be held not less than 20
business  days nor more than 30 days from the  mailing  of such  notice  for the
purpose of voting on and  approving,  inter  alia,  (a) this  Agreement  and the
transactions   contemplated  hereby,  and  (b)  the  Escrow  Agreement  and  the
transactions  contemplated thereby, and the designation of a representative (the
"Representative") to act on behalf of the Company Shareholders, including naming
one or more alternative  individuals to act as  Representative in the event that
the  designated  Representative  shall have died,  resigned or otherwise  become
incapable or unwilling to act as Representative and providing for an appropriate
selection procedure if all of such named alternatives are unwilling or unable to
serve as Representative (the "Company Shareholders' Approval").  Approval of the
Escrow Agreement and the selection of the Representative  (and successors) shall
be included in a resolution to be acted upon by the Company  Shareholders.  Such
resolution shall provide for, inter alia, the Company  Shareholders'  acceptance
of the Representative as the collective agent of the Company  Shareholders under
the terms of the Escrow  Agreement;  and authorize  such  Representative  to (w)
execute and deliver the Escrow Agreement and any documents incident or ancillary
thereto, including without limitation, any amendments, cancellations, extensions
or waivers in respect thereof, (x) respond to and make determinations in respect
of the assertion of any and all claims for  indemnification  by Omnicom,  and to
assert claims,  pursuant to the terms of the Escrow Agreement and the provisions
of this Agreement  pertaining thereto,  (y) execute and deliver any stock powers


                                       30
<PAGE>

which may be required to be  executed  by any  Company  Shareholder  in order to
permit the delivery to Omnicom of any shares of Omnicom Stock to be delivered to
Omnicom  from an Escrow Fund in  accordance  with the  provisions  of the Escrow
Agreement,  and (z) take all such other actions as may be necessary or desirable
to  carry  out  his   responsibilities   as  collective  agent  of  the  Company
Shareholders in respect of the Escrow Agreement.  The Company shall use its best
efforts to obtain the Company Shareholders'  Approval. The Company will, through
its Board of Directors, include in the Information Statement, the recommendation
of the Board of Directors of the Company that the Voting Shareholders adopt this
Agreement and the Escrow  Agreement,  and approve the Merger,  the  transactions
contemplated by this Agreement and the Escrow Agreement,  and the appointment of
the Representative.

     Section  5.10 Tax  Returns.  The Company  will cause to be prepared all tax
returns of the  Company and its  Subsidiaries  required to be filed prior to the
Effective  Time  (taking into  account any valid  extensions  of due dates) with
respect to the taxable year ended  December 31, 1995.  Except as Omnicom and the
Company may agree,  such  returns will be prepared in  accordance  with the past
practices of the Company  (including tax accounting  methods,  tax elections and
similar items),  to the extent permitted by law. Such returns shall be furnished
to  Omnicom no later than 15 days  prior to the due date  thereof  (taking  into
account  any valid  extensions  of due  dates)  for  Omnicom's  approval,  which
approval shall not be unreasonably withheld or delayed.

     Section 5.11 Fulfillment of Conditions. Subject to the terms and conditions
of this  Agreement,  at the Closing the Company  will  execute and deliver  each
agreement  that the  Company  is  required  hereby to execute  and  deliver as a
condition to the Closing, will take all commercially  reasonable steps necessary
or  desirable  and proceed  diligently  and in good faith to satisfy  each other
condition to the obligations of Omnicom and OmniSub  contained in this Agreement
and will not take or fail to take any action that could  reasonably  be expected
to result in the nonfulfillment of any such condition.

     Section 5.12 Repayment of Indebtedness.  Between the Execution Date and the
Closing  Date,  all  indebtedness  of  directors,  officers and employees of the
Company or any  Subsidiary to the Company or any  Subsidiary  shall be repaid in
full,  other than (a) as set forth on Schedule  5.12 and (b) routine  travel and
expense  advances or relocation  allowances  made (x) in the ordinary  course of
business,  (y) within the 90 days prior to the Closing Date,  and (z) consistent
in amount with past practice. Section 5.13 Tax Opinion. The Company will provide
Omnicom with the written  opinion of Deloitte & Touche LLP regarding tax matters
for inclusion in the initial filing of the Registration Statement.

     Section 5.14 Amendment of Profit  Sharing Plan.  Between the Execution Date
and the Closing  Date,  the Company shall take such action as may be required to
amend the Profit Sharing Plan to eliminate the minimum contribution each year of
20% of pre-tax  consolidated  income,  with respect to all or any portion of the
calendar year commencing January 1, 1996 and to all years thereafter.

                                       31
<PAGE>


                                   ARTICLE VI

                        COVENANTS OF OMNICOM AND OMNISUB

     Omnicom and OmniSub  covenant and agree with the Company that, at all times
from and after the  Execution  Date until the Closing,  Omnicom and OmniSub will
comply with all  covenants  and  provisions  of this  Article VI,  except to the
extent the Company may otherwise consent in writing.

     Section 6.1  Regulatory and Other  Approvals.  Omnicom and OmniSub will (a)
take all  commercially  reasonable  steps  necessary or  desirable,  and proceed
diligently and in good faith and use all  commercially  reasonable  efforts,  as
promptly as practicable to obtain all consents, approvals or actions of, to make
all  filings  with  and to  give  all  notices  to  Governmental  or  Regulatory
Authorities or any other Person required of Omnicom or OmniSub to consummate the
transactions  contemplated hereby,  including without limitation those described
on Schedule 4.3.2, (b) provide such other information and communications to such
Governmental or Regulatory  Authorities or other Persons as such Governmental or
Regulatory  Authorities  or other Persons may  reasonably  request in connection
therewith and (c) provide reasonable cooperation to the Company in obtaining all
consents,  approvals  or  actions  of,  making all  filings  with and giving all
notices to Governmental or Regulatory  Authorities or other Persons  required of
the Company to consummate the  transactions  contemplated  hereby.  Omnicom will
provide  prompt  notification  to the Company when any such  consent,  approval,
action,  filing or notice  referred to in clause (a) above is  obtained,  taken,
made or given, as applicable,  and will advise the Company of any communications
(and,  unless precluded by law, provide copies of any such  communications  that
are in writing) with any  Governmental  or Regulatory  Authority or other Person
regarding any of the transactions contemplated by this Agreement.

     Section 6.2 HSR Filings.  In addition to and without limiting the covenants
contained in Section 6.1,  Omnicom will (a) take promptly all actions  necessary
to make the  filings  required of Omnicom  under the HSR Act,  (b) comply at the
earliest  practicable date with any request for additional  information received
by Omnicom from the Federal Trade  Commission  or the Antitrust  Division of the
Department of Justice pursuant to the HSR Act and (c) cooperate with the Company
in connection with the Company's filing under the HSR Act and in connection with
resolving  any  investigation  or  other  inquiry  concerning  the  transactions
contemplated by this Agreement  commenced by either the Federal Trade Commission
or the  Antitrust  Division  of the  Department  of Justice  or state  attorneys
general.

     Section  6.3  Financial  Information  and  Reports.  As soon as  reasonably
practicable  after it becomes publicly  available,  Omnicom shall furnish to the
Company any Report on Form 10-K or other registration  statement or report filed
by Omnicom with the SEC following  the  Execution  Date and prior to the Closing
Date.

     Section 6.4 Notice and Cure.  Omnicom or OmniSub will notify the Company in
writing of any and all  information  or documents  relating to, and will use all
commercially   reasonable  efforts  to  cure  before  the  Closing,  any  event,
transaction or  circumstance,  as soon as practicable  after it becomes known to
Omnicom or OmniSub, occurring after the Execution Date that causes or will cause
any  covenant or  agreement  of Omnicom or OmniSub  under this  Agreement  to be
breached  or that  renders or will  render  untrue in any  material  respect any


                                       32
<PAGE>

representation  or warranty of Omnicom or OmniSub contained in this Agreement as
if the  same  were  made  on or as of the  date of such  event,  transaction  or
circumstance. Omnicom or OmniSub also will notify the Company in writing of, and
will use all commercially  reasonable  efforts to cure, before the Closing,  any
other  violation or breach,  as soon as  practicable  after it becomes  known to
Omnicom or OmniSub, of any representation,  warranty, covenant or agreement made
by Omnicom  or  OmniSub in this  Agreement.  No notice  given  pursuant  to this
Section shall have any effect on the representations,  warranties,  covenants or
agreements contained in this Agreement for purposes of determining  satisfaction
of any condition contained herein.

     Section 6.5 Fulfillment of Conditions.  Subject to the terms and conditions
of this Agreement,  at the Closing Omnicom and OmniSub will execute and deliver,
or cause the execution and delivery of, each  agreement that Omnicom and OmniSub
or one of their  affiliates  is hereby  required  to  execute  and  deliver as a
condition to the Closing, will take all commercially  reasonable steps necessary
or  desirable  and proceed  diligently  and in good faith to satisfy  each other
condition to the obligations of the Company contained in this Agreement and will
not take or fail to take any action that could  reasonably be expected to result
in the nonfulfillment of any such condition.

     Section 6.6 Blue Sky; New York Stock Exchange Listing.  Omnicom and OmniSub
will use their best  efforts to (a) obtain no later than the  effective  date of
the  Registration   Statement  all  necessary  state  securities  and  blue  sky
authorizations  required  to issue the  Omnicom  Stock as  contemplated  by this
Agreement (and pay all expenses  incident  thereto) and (b) cause such shares of
Omnicom  Stock to be  listed on the New York  Stock  Exchange,  subject  only to
official  notice of  issuance.  

     Section 6.7 Exchange Act Filings.  For a period of three years  immediately
following  the Closing  Date,  Omnicom shall file in a timely manner all reports
required to be filed  pursuant to and in accordance  with Section 13 and Section
15(d) of the Exchange Act.

     Section 6.8 Indemnification of Directors and Officers.

          (a)  Except  to  the  extent  required  by  law,  for as  long  as the
     directors' and officers'  liability  insurance is required to be maintained
     under  clause (b) below,  Omnicom  will not take any action so as to amend,
     modify or repeal the provisions for indemnification of directors, officers,
     employees or agents  contained in the Articles of  Incorporation or By-laws
     (or other comparable  charter  documents) of the Surviving  Corporation and
     its Subsidiaries (which as of the Effective Time shall be no less favorable
     to  such   individuals  than  those  maintained  by  the  Company  and  its
     Subsidiaries  on the date hereof) in such a manner as would  materially and
     adversely  affect the rights of any  individual  who shall have served as a
     director,  officer,  employee  or  agent  of  the  Company  or  any  of its
     Subsidiaries  prior  to  the  Effective  Time  to be  indemnified  by  such
     corporations  in respect of their serving in such  capacities  prior to the
     Effective Time.

          (b) Except as provided in the next  sentence,  Omnicom shall cause the
     Surviving  Corporation  to  maintain  in effect for three years the current
     policies of  directors'  and  officers'  liability  insurance and fiduciary
     liability   insurance   maintained   by  the  Company  and  the   Company's
     Subsidiaries with respect to matters occurring prior to the Effective Time;
     provided,  however, that Omnicom, at the Surviving  Corporation's cost, may
     substitute  therefor policies of substantially the same coverage containing
     terms and conditions which are no less favorable than any such insurance in
     effect  immediately  prior  to  the  Effective  Time.  Notwithstanding  the
     foregoing,  Omnicom  shall  not be  required  to pay in any year an  annual

                                       33
<PAGE>

     premium for such  insurance  in excess of $50,000,  and shall cease to have
     any  obligation  under  this  Section  6.8 as soon as it (or the  Surviving
     Corporation)  shall  have  expended  an  aggregate  of  $150,000  for  such
     insurance.  In any year in which the annual  premium shall exceed  $50,000,
     Omnicom shall  maintain (if insurance is  obtainable) at least the level of
     such insurance as may be obtained at an annual premium of $50,000.


                                   ARTICLE VII

                                MUTUAL COVENANTS

     Omnicom,  OmniSub and the  Company  mutually  covenant  and agree with each
other as follows:

     Section 7.1 Preparation of Registration Statement.  Omnicom and the Company
shall  prepare  the  Registration  Statement  to be filed with the SEC under the
Securities  Act for the  registration  of the  Omnicom  Stock  to be  issued  in
connection  with this  Agreement.  The  Registration  Statement  and the related
Information  Statement  and  prospectus  forming  a  part  of  the  Registration
Statement  shall be mailed to the Voting  Shareholders  in  connection  with the
Special  Meeting,  to be held for the purpose of  authorizing  the  transactions
contemplated by this Agreement (the  Registration  Statement and the Information
Statement  and  prospectus  are  hereinafter  referred  to  collectively  as the
"Prospectus Materials"). Omnicom and the Company shall cooperate with each other
in the preparation of the Prospectus  Materials and any related filings as shall
be  necessary  under the  securities  laws of any  state or other  jurisdiction.
Omnicom shall prepare and file the Registration Statement and shall use its best
efforts to cause it to become  effective  as promptly as  possible.  Omnicom and
OmniSub  and the Company  shall  furnish  all  information  relating to Omnicom,
OmniSub or the  Company  and its  Subsidiaries,  as the case may be,  reasonably
necessary in order to prepare the Prospectus Materials.

     Section 7.2 Affiliates  Representation  Letters. Prior to the Closing Date,
the Company shall furnish Omnicom with a list identifying all persons who may be
considered,  in its opinion,  to be  "affiliates"  of the  Company,  as the term
"affiliates"  is used in Paragraphs (c) and (d) of Rule 145 under the Securities
Act or in SEC ASR No. 135 (the "Company Affiliates").  The Company shall use its
best efforts to cause each Person who it has  identified as a Company  Affiliate
and each  additional  Person,  if any, that Omnicom has identified in writing to
the  Company  as a Company  Affiliate,  to  deliver  to Omnicom on or before the
Closing Date the Affiliates Representation Letter attached hereto as Exhibit B.

     Section 7.3 Reasonable Efforts to Consummate Transaction.  Omnicom, OmniSub
and the Company will each use its  reasonable  efforts and will fully  cooperate
with each other to consummate the transactions contemplated by this Agreement.

     Section 7.4 Public  Announcements.  Omnicom,  OmniSub and the Company  will
consult with each other before  issuing any press  releases or otherwise  making
any public  statements with respect to this Agreement or any of the transactions
contemplated  hereby  and shall not issue  any such  press  release  or make any
public statement  without the prior consent of the other parties which shall not
be  unreasonably  withheld,  except as may be required by law or by  obligations


                                       34
<PAGE>

pursuant to any listing agreements with any national securities exchange.

     Section 7.5 Transfer Tax  Compliance.  The Company and Omnicom shall comply
with Article 31-B of the New York State Tax Law (the "Gains  Tax"),  relating to
the New York State Real Property  Transfer  Gains Tax,  Section 14.15 of the New
York State Tax Law  relating to the New York State Real Estate  Transfer Tax and
Chapter 21, Title 11 of the Administrative Code of the City of New York relating
the New York City Real  Property  Transfer  Tax and any  similar  taxes of other
applicable  jurisdictions (all such taxes  collectively,  the "Transfer Taxes").
For such purposes, the Company and Omnicom agree that the leasehold interests of
the  Company  in New York have no value and that no  portion  of the  conversion
price for the Company Stock is allocable  thereto.  If transferor and transferee
questionnaires  are required for compliance  with the Gains Tax, the Company and
Omnicom shall promptly complete and execute such questionnaires, and the Company
shall cause the questionnaires to be filed with the New York State Department of
Taxation  not later than  twenty  days prior to the  Closing  Date.  Any similar
pre-Closing filing required under the laws of any other applicable  jurisdiction
shall be made not later than the due date therefor.  At the Closing, the Company
shall  deliver  and  cause  to be  filed  all  returns  required  to be filed in
connection with the Transfer Taxes.


                                  ARTICLE VIII

                CONDITIONS TO OBLIGATIONS OF OMNICOM AND OMNISUB

     The  obligations  of Omnicom and OmniSub  hereunder to effect the Merger on
the Closing Date are subject to the  fulfillment,  at or before the Closing,  of
each of the following conditions (except with respect to Sections 8.5, 8.6, 8.7,
8.8 and the first  sentence of 8.10,  all or any of which may be waived in whole
or in part by Omnicom, on behalf of itself and OmniSub, in its sole discretion):

     Section  8.1  Representations  and  Warranties.   The  representations  and
warranties made by the Company in this Agreement,  or in any Schedule  delivered
pursuant hereto, shall be true and correct in all material respects on and as of
the Closing  Date with the same force and effect as though made on and as of the
Closing  Date or, in the case of  representations  and  warranties  made as of a
specified  date earlier than the Closing  Date,  on and as of such earlier date,
and the Company shall have delivered to Omnicom and OmniSub a certificate, dated
the Closing Date, to such effect.

     Section 8.2 Good Standing Certificates. The Company shall have delivered to
Omnicom and OmniSub a certificate of existence from the Pennsylvania  Department
of State and a certificate from the Secretary of State (or comparable  official)
of each  jurisdiction  in which the Company is qualified to do business,  to the
effect that the Company is in good standing in such  jurisdiction  (in each case
together with the  applicable  tax status  certificate).  The Company shall have
delivered to Omnicom and OmniSub a  certificate  from the Secretary of State (or
comparable  official) of each jurisdiction in which a Subsidiary is organized or
qualified to do business, to the effect that such Subsidiary is in good standing
in such jurisdiction (together with the applicable tax status certificate).

     Section 8.3 Performance. The Company shall have performed and complied with
the agreements,  covenants and  obligations  required by this Agreement to be so


                                       35
<PAGE>

performed  or  complied  with by the Company at or before the  Closing,  and the
Company  shall have  delivered to Omnicom and OmniSub a  certificate,  dated the
Closing Date, to such effect.

     Section 8.4  Certified  Resolutions.  The Company  shall have  delivered to
Omnicom and OmniSub  copies of resolutions of the Boards of Directors and of the
stockholders of the Company authorizing the execution,  delivery and performance
of this Agreement and the transactions  contemplated hereby, certified to by the
Secretary of the Company.

     Section 8.5 Registration  Statement;  New York Stock Exchange Listing.  The
Registration  Statement shall have been declared effective by the SEC and on the
Closing Date shall remain  effective and shall not be subject to a stop order or
any  threatened  stop  orders.  All  necessary  state  securities  and  blue sky
authorizations  required  to carry  out the  transactions  contemplated  by this
Agreement  shall have been  obtained.  The Omnicom Stock  issuable in connection
with this Agreement  shall have been duly listed on the New York Stock Exchange,
subject only to official notice of issuance.

     Section 8.6 Company  Shareholders'  Approval and  Dissenters'  Rights.  The
Special  Meeting  shall have been duly held and at such  meeting  the  requisite
affirmative  vote  of the  Voting  Shareholders  shall  have  been  recorded  to
authorize and to approve the transactions contemplated hereby in accordance with
applicable  provisions of Pennsylvania  law. The aggregate  number of Dissenting
Shares shall not exceed 3% of the total number of shares of Company Common Stock
outstanding  on the Closing Date.  The Trustee of the Profit  Sharing Plan shall
have voted all shares of Company Stock held by the Profit  Sharing Plan in favor
of the Merger.

     Section  8.7  No  Injunctions   or   Restraints.   No  court  of  competent
jurisdiction or other competent  Governmental or Regulatory Authority shall have
enacted,  insured,  promulgated,  enforced  or entered by Law or Order  (whether
temporary,  preliminary or permanent) which is then in effect and has the effect
of making or otherwise  restricting,  preventing or prohibiting  consummation of
the Merger or the other transactions contemplated by this Agreement. 

     Section 8.8 Regulatory Consents and Approvals. All consents,  approvals and
actions of, filings with and notices to any Governmental or Regulatory Authority
necessary  to  permit  Omnicom,   OmniSub  and  the  Company  to  perform  their
obligations under this Agreement and to consummate the transactions contemplated
hereby shall have been duly  obtained,  made or given and shall be in full force
and effect,  and all  terminations  or expirations of waiting periods imposed by
any Governmental or Regulatory  Authority  necessary for the consummation of the
transactions contemplated by this Agreement,  including under the HSR Act, shall
have occurred.

     Section 8.9 Required  Approvals,  Notices and  Consents.  The Company shall
have obtained or given,  as the case may be, at no expense to Omnicom or OmniSub
and there shall not have been  withdrawn  or  modified  any  notices,  consents,
approvals or other actions  listed on Schedule  3.9.2 hereof.  Each such consent
shall be in form reasonably satisfactory to counsel for Omnicom and OmniSub.

     Section  8.10  Pooling of  Interests  Accounting.  The SEC  shall  not have
objected to  Omnicom's  treatment  of the Merger as a  pooling-of-interests  for
accounting purposes.  Omnicom shall have received a letter from each of Deloitte


                                       36
<PAGE>

&  Touche  LLP  and  Arthur  Andersen  LLP,  in a form  acceptable  to  Omnicom,
confirming that the Company and Omnicom,  respectively, are poolable entities as
provided in APB No. 16.

     Section 8.11 Opinion of Counsel.  Omnicom and OmniSub  shall have  received
the opinions of counsel to the Company, dated the Closing Date, substantially in
the forms and to the effect of Exhibits C-1 and C-2 hereto.

     Section  8.12 Escrow  Agreement.  The  Representative  and the Escrow Agent
shall have entered into the Escrow Agreement.

     Section 8.13 Employment Agreements. The Company and each of the individuals
listed on  Schedule  8.13  shall  have  entered  into an  employment  agreement,
substantially  in the form  previously  approved  by each  such  individual  and
Omnicom.

     Section 8.14 Non-Competition  Agreements. Each of the individuals listed on
Schedule 8.14 shall have entered into a non-competition  agreement substantially
in the form previously approved by each such individual and Omnicom.

     Section  8.15  Affiliates.  Representation  Letterss.  Each of the  Company
Affiliates   shall  have  executed  and  delivered  to  Omnicom  the  Affiliates
Representation Letter referred to in Section 7.2.

     Section 8.16 Material Adverse Effect. Except for the execution and delivery
of this Agreement and the transactions to take place pursuant hereto on or prior
to the Closing Date,  since the Execution Date there shall not have occurred any
Material Adverse Effect, or any event or development  which,  individually or in
the  aggregate,  could  reasonably  be expected to result in a Material  Adverse
Effect.

     Section 8.17  Proceedings.  All proceedings to be taken on the part of the
Company in connection with the  transactions  contemplated by this Agreement and
all documents  incident  thereto shall be  reasonably  satisfactory  in form and
substance to Omnicom and OmniSub,  and Omnicom and OmniSub  shall have  received
copies of all such  documents  and other  evidences  as Omnicom  and OmniSub may
reasonably  request in order to establish the consummation of such  transactions
and the taking of all proceedings in connection therewith.

     Section 8.18 No Withholding Certificate.   The Company shall have delivered
to Omnicom the  statement  described in Section  1445(b)(3)  of the Code and the
regulations thereunder,  to the effect that the Company is not, and has not been
during the period  specified in Section  897(c)(1)(A)(ii)  of the Code, a United
States real property holding  corporation as defined in Section 897(c)(2) of the
Code.

     Section 8.19 Tax Opinion.  The Company  shall have  received the opinion of
Deloitte and Touche LLP, dated the Closing Date, confirming the tax opinions set
forth in its opinion delivered pursuant to Section 5.13.

     Section 8.20 Waivers.  The Company shall have  delivered to Omnicom a fully
executed copy of the "Consent Regarding  Agreement Among Ketchum  International,
Inc., Newscan Company Ltd., Kenneth Chu and Betty Lo".

                                       37
<PAGE>


                                   ARTICLE IX

                    CONDITIONS TO OBLIGATIONS OF THE COMPANY

     The  obligations of the Company  hereunder to effect the Merger are subject
to the  fulfillment,  at or  before  the  Closing,  of  each  of  the  following
conditions (except with respect to Sections 9.5, 9.6, 9.7 and 9.8, all or any of
which may be waived in whole or in part by the Company in its sole discretion):

     Section  9.1  Representations  and  Warranties.   The  representations  and
warranties  made by Omnicom and OmniSub in this  Agreement,  or in any  Schedule
delivered pursuant hereto, shall be true and correct in all material respects on
and as of the Closing  Date with the same force and effect as though made on and
as of the Closing Date, or, in the case of  representations  and warranties made
as of a specified  date earlier than the Closing Date, on and as of such earlier
date, and Omnicom and OmniSub shall have delivered to the Company a certificate,
dated the Closing Date, to such effect.

     Section 9.2 Good Standing Certificates. Omnicom shall have delivered to the
Company a  certificate  from the  Secretary of State of the State of New York to
the effect that  Omnicom is in good  standing in such state;  and OmniSub  shall
have delivered to the Company a certificate  of existence from the  Pennsylvania
Department of State.

     Section  9.3  Performance.  Omnicom and OmniSub  shall have  performed  and
complied  with  the  agreements,  covenants  and  obligations  required  by this
Agreement  to be so  performed  or  complied  with by Omnicom  and OmniSub at or
before the Closing,  and Omnicom and OmniSub shall have delivered to the Company
a certificate, dated the Closing Date, to such effect.

     Section 9.4 Certified Resolutions. Omnicom and OmniSub shall have delivered
to the Company a copy of the  resolutions  of the Boards of Directors of each of
Omnicom and OmniSub authorizing the execution,  delivery and performance of this
Agreement  and  the  transactions  contemplated  hereby,  certified  to  by  the
Secretary of Omnicom and OmniSub, respectively.

     Section 9.5 Registration  Statement,  New York Stock Exchange Listing.  The
Registration  Statement shall have been declared effective by the SEC and on the
Closing Date shall remain  effective and shall not be subject to a stop order or
any  threatened  stop  orders.  All  necessary  state  securities  and  blue sky
authorizations  required  to carry  out the  transactions  contemplated  by this
Agreement  shall have been  obtained.  The Omnicom Stock  issuable in connection
with this Agreement  shall have been duly listed on the New York Stock Exchange,
subject only to official notice of issuance.

     Section 9.6 Company Shareholders'  Approval. The Special Meeting shall have
been duly held and at such meeting the requisite  affirmative vote of the Voting
Shareholders   shall  have  been  recorded  to  authorize  and  to  approve  the
transactions  contemplated  hereby in accordance with  applicable  provisions of
Pennsylvania law.

     Section  9.7  No  Injunctions   or   Restraints.   No  court  of  competent
jurisdiction or other competent  Governmental or Regulatory Authority shall have


                                       38
<PAGE>

enacted,  insured,  promulgated,  enforced  or entered by Law or Order  (whether
temporary,  preliminary or permanent) which is then in effect and has the effect
of making or otherwise  restricting,  preventing or prohibiting  consummation of
the Merger or the other transactions contemplated by this Agreement.

     Section 9.8 Regulatory Consents and Approvals. All consents,  approvals and
actions of, filings with and notices to any Governmental or Regulatory Authority
necessary  to  permit  the  Company,   Omnicom  and  OmniSub  to  perform  their
obligations under this Agreement and to consummate the transactions contemplated
hereby shall have been duly  obtained,  made or given and shall be in full force
and effect,  and all  terminations  or expirations of waiting periods imposed by
any Governmental or Regulatory  Authority  necessary for the consummation of the
transactions contemplated by this Agreement,  including under the HSR Act, shall
have occurred.

     Section  9.9  Opinion of  Counsel.  The  Company  shall have  received  the
opinions  of  counsels  to  Omnicom  and  OmniSub,   dated  the  Closing   Date,
substantially in the form and to the effect of Exhibits D-1 and D-2 hereto.

     Section  9.10 Escrow  Agreement.  Omnicom  and the Escrow  Agent shall have
entered into the Escrow Agreement.

     Section 9.11 Material Adverse Effect. Except for the execution and delivery
of this Agreement and the transactions to take place pursuant hereto on or prior
to the Closing Date, since the Execution Date there shall not have occurred with
respect to Omnicom any material  adverse  change in the condition  (financial or
otherwise), liabilities, results of operations, assets, properties or businesses
of Omnicom and its subsidiaries  taken as a whole, or any events or developments
which, individually or in the aggregate,  could reasonably be expected to have a
material adverse change in the condition (financial or otherwise),  liabilities,
results of  operations,  assets,  properties  or  businesses  of Omnicom and its
subsidiaries taken as a whole.

     Section  9.12  Proceedings.  All  proceedings  to be  taken  on the part of
Omnicom and OmniSub in connection  with the  transactions  contemplated  by this
Agreement and all documents incident thereto shall be reasonably satisfactory in
form and substance to the Company, and the Company shall have received copies of
all such documents and other evidences as the Company may reasonably  request in
order to establish the  consummation of such  transactions and the taking of all
proceedings in connection therewith.

     Section 9.13 Tax Opinion.  The Company  shall have  received the opinion of
Deloitte & Touche LLP,  dated the Closing Date, to the effect that the Merger is
a reorganization within the meaning of Section 368 of the Code.


                                    ARTICLE X

                              ADDITIONAL AGREEMENTS

     Section 10.1  Termination.  This Agreement may be terminated and the Merger
and other transactions contemplated herein may be abandoned at any time prior to
the  Closing,  notwithstanding  the  adoption of this  Agreement  by the Company
Shareholders by:

                                       39
<PAGE>

          (a) mutual  consent of the Boards of Directors of each of the Company,
     Omnicom and OmniSub;

          (b) either  Omnicom and OmniSub,  on the one hand, or the Company,  on
     the  other  hand,  (provided  the  terminating  party is not then in breach
     hereof) if the other party  breaches  its  representations,  warranties  or
     covenants  hereunder in any  material  respect and such breach is not cured
     within  30 days  after the  delivery  of  written  notice  thereof  to such
     breaching party unless the breach of any such representation,  warranty, or
     covenant does not  materially  adversely  affect the  financial  condition,
     business  or assets of the  breaching  party or the  ability  of any or all
     parties to consummate the transactions contemplated hereby;

          (c) the  Boards of  Directors  of either  Omnicom  and  OmniSub or the
     Company in the event a final and nonappealable order, decree or judgment of
     any  court,  agency,  commission  or  governmental  authority  is issued or
     existing against the parties or any of them or any of their directors which
     would enjoin the transactions contemplated hereby;

          (d) either  Omnicom and OmniSub,  on the one hand, or the Company,  on
     the other hand, if the Closing Date has not occurred  prior to the close of
     business on December 31, 1996;

          (e) either  Omnicom and OmniSub,  on the one hand, or the Company,  on
     the other  hand,  at any time prior to the  scheduled  Closing  Date if the
     conditions to such  parties'  obligation to close set forth in Article VIII
     or IX, respectively,  shall have become incapable of being satisfied by the
     close of business on December 31, 1996.

     Section 10.2 Effect of  Termination.  If this  Agreement is  terminated  as
provided in Section 10.1 hereof, then except for the provisions of Sections 12.1
and 12.7,  which shall survive such  termination,  and as otherwise  provided in
this Section,  this Agreement shall forthwith  become void and there shall be no
liability  on the  part  of any  party  hereto  or its  respective  officers  or
directors  arising from the act of such  permitted  termination.  Nothing herein
shall preclude,  however,  any action or claim for damages to which any party is
otherwise entitled as a result of breach by the other party hereto.


                                   ARTICLE XI

                            SURVIVAL; INDEMNIFICATION

     Section 11.1 Survival. Subject to the limitations set forth in Section 11.4
hereof, the respective representations,  warranties, covenants and agreements of
the Company, Omnicom and OmniSub contained in this Agreement or in any Schedule,
or in any  certificate  delivered  at the  Closing,  shall  survive the Closing.
Notwithstanding  any right of any party hereto fully to investigate  the affairs
of any other party,  and  notwithstanding  any knowledge of facts  determined or
determinable  pursuant to such  investigation  or right of  investigation,  each
party  hereto  shall  have the  right to rely  fully  upon the  representations,
warranties,  covenants  and  agreements  of any other  party  contained  in this


                                       40
<PAGE>

Agreement or in any Schedule  furnished by another  party or in any  certificate
delivered at the Closing by any other party.

     Section 11.2 Obligation to Indemnify.  Subject to the limitations set forth
in Section 11.4 hereof, the Company Shareholders,  through the provisions of the
Escrow  Agreement,  agree to  indemnify  Omnicom,  OmniSub and their  respective
affiliates,  directors,  officers and employees  (collectively  the "Indemnified
Parties")  against,  and to  protect,  save and keep  harmless  the  Indemnified
Parties  from,  and to assume  liability  for,  (a)  payment of all  liabilities
(including  liabilities for Taxes),  obligations,  losses,  damages,  penalties,
claims, actions, suits,  judgments,  settlements,  out-of-pocket costs, expenses
and disbursements  (including reasonable costs of investigation,  and reasonable
attorneys',  accountants'  and  expert  witnesses'  fees) of  whatever  kind and
nature, to the extent not covered by insurance maintained for the benefit of the
applicable Indemnified Parties (collectively,  "Losses"), that may be imposed on
or incurred by the Indemnified Parties as a consequence of or in connection with
any  inaccuracy  or breach of any  representation  or  warranty  (other than the
representation  made in the last  sentence  of Section  3.12) or covenant of the
Company  contained in or made  pursuant to this  Agreement,  or the breach of or
failure by the Company to perform or discharge any of its obligations under this
Agreement or under the transactions  contemplated  hereby, and (b) any Losses in
connection with the  reorganization  of the media buying  operations of KCI. The
term "Losses" as used herein is not limited to matters asserted by third parties
against an  Indemnified  Party but includes  Losses  incurred or sustained by an
Indemnified Party in the absence of third party claims.

     Section 11.3 Indemnification Procedures.

     11.3.1 Notice of Asserted  Liability.  Omnicom  shall  promptly give notice
(the  "Claims  Notice")  to  the   Representative   of  any  demand,   claim  or
circumstances  which gives  rise,  or with the lapse of time would or might give
rise to a claim or the commencement (or threatened  commencement) of any action,
proceeding  or  investigation  that  may  result  in any  Losses  (an  "Asserted
Liability")  without regard to the limitations on  indemnification  set forth in
Section 11.4 below.  The Claims Notice shall describe the Asserted  Liability in
reasonable detail, shall indicate the amount (estimated if necessary, and to the
extent  feasible)  of the  Losses  that  have  been  or may  be  suffered  by an
Indemnified Party.

     11.3.2 Defense of Asserted Liability. If the facts giving rise to the claim
for  indemnification  shall involve any actual or threatened  claim or demand by
any third party against any Indemnified Party or by an Indemnified Party against
any third party (a "Third Party Claim"),  Omnicom shall have the right to defend
or prosecute such Third Party Claim through counsel of Omnicom's own choosing.

     11.3.3  Cooperation.   The   Representative,   on  behalf  of  the  Company
Shareholders,  shall be entitled to participate in the defense or prosecution of
any such claim,  demand or litigation at his own expense and through  counsel of
his own choosing, but control thereof shall remain with Omnicom.

     11.3.4 Settlements.  Omnicom may not settle any claim, demand or litigation
which would give rise to an indemnification  claim hereunder without the consent
of the  Representative,  which  consent  may  not be  unreasonably  withheld  or
delayed.

                                       41
<PAGE>

Section 11.4 Limitations on Indemnification.

     11.4.1  Indemnity  Cushion.  Except as  provided in the next  sentence,  no
claim,  action or other  Asserted  Liability  (other than an Asserted  Liability
under  Sections 3.27 or 3.28 or the last sentence of Section 3.19.3 hereof) with
respect to Losses arising out of any of the matters referred to in clause (a) of
Section  11.2 may be  reimbursed  until  such time as  claims,  actions or other
Asserted  Liabilities  with respect to Losses  arising out of any of the matters
referred to in clause (a) of Section 11.2 (other than Asserted Liabilities under
Sections  3.27 or 3.28 or the last  sentence  of Section  3.19.3  hereof)  shall
exceed $100,000 in the aggregate (in which case the Company  Shareholders  shall
be liable only for all Losses in excess of $100,000).  Losses  arising out of an
Asserted  Liability  arising  out of the  matter  referred  to in clause  (b) of
Section  11.2 or under  Sections  3.27 or 3.28 or the last  sentence  of Section
3.19.3, shall be reimbursable without regard to the $100,000 cushion.

     11.4.2 Termination of Indemnification Obligations and Other Limitations.

     (a) Except as provided in the next sentence,  the obligation of the Company
Shareholders  to indemnify shall terminate and be of no further force and effect
on the  "Termination  Date,"  which shall be earlier to occur of (x) the date of
the first  independent  audit report,  if any, of the  financial  results of the
Surviving  Corporation  following  the  Effective  Time or (y) one year from the
Effective  Time;  provided,  however,  that (A) claims for Losses  arising under
clause (a) of Section  11.2  asserted in writing on or prior to the  Termination
Date shall survive until they are decided and are final and binding upon Omnicom
and the Representative  (on behalf of the Company  Shareholders) as contemplated
by the Escrow Agreement, and (B) no claim for Losses arising under clause (a) of
Section  11.2  may  be  asserted  after  the  Termination  Date.  The  foregoing
limitation  shall not apply with  respect to matters as to which an  Indemnified
Party is entitled to be indemnified under clause (b) of Section 11.2.

     (b) The parties agree that the satisfaction of liabilities under the Escrow
Agreement,  and the procedures to be followed in respect thereof, are subject to
the specific  provisions of such Escrow Agreement relating to the release of the
Escrow Funds.

     (c) The rights of Omnicom  and the other  Indemnified  Parties set forth in
this Article XI are the exclusive remedy and in lieu of any and all other rights
and  remedies  with  respect to Losses  arising out of the matters  specified in
Section 11.2, and such Losses shall be satisfied solely from the Escrow Funds in
accordance  with the  provisions  of this Article XI and the  provisions  of the
Escrow  Agreement,  and Omnicom and OmniSub  agree that none of the  Indemnified
Parties  shall  have any  recourse  for the  payment  of any  Losses of any kind
whatsoever  arising  under  Section  11.2  against  the past,  present or future
stockholders, directors, officers and employees of the Company, nor shall any of
such  persons be  personally  liable  for any such  Losses,  it being  expressly
understood that the sole remedy of the Indemnified  Parties shall be against the
Escrow Funds in accordance with the Escrow Agreement.

     11.4.3  Treatment.  Any payments to an Indemnified Party under this Article
XI (or under  the  Escrow  Agreement)  shall be  treated  by the  parties  as an
adjustment to purchase price.



                                       42
<PAGE>

                                   ARTICLE XII

                                  MISCELLANEOUS

     Section  12.1  Expenses.  The  parties  hereto  shall  pay all of their own
expenses relating to the transactions contemplated by this Agreement, including,
without limitation, the fees and expenses of their respective counsel, financial
advisors and accountants.

     Section 12.2 Governing Law. The  interpretation  and  construction  of this
Agreement, and all matters relating hereto, shall be governed by the laws of the
Commonwealth  of  Pennsylvania   without  reference  to  its  conflict  of  laws
provisions.

     Section 12.3 Person Defined. "Person" shall mean and include an individual,
a  partnership,  a joint  venture,  a corporation,  a trust,  an  unincorporated
organization and a government or other department or agency thereof.

     Section  12.4  Knowledge  Defined.  Where any  representation  and warranty
contained  in  this  Agreement  is  expressly  qualified  by  reference  to best
knowledge,  information and belief of a party, such term shall be limited to the
actual   knowledge   of  the   executive   officers  of  the  party  making  the
representation  and warranty and such knowledge that would have been  discovered
by such executive officers after due and reasonable inquiry.

     Section 12.5 Affiliate Defined.  As used in this Agreement,  an "affiliate"
of any Person, shall mean any Person that directly, or indirectly through one or
more intermediaries,  controls,  or is controlled by, or is under common control
with such Person.

     Section  12.6  Captions.  Captions  The Article and Section  captions  used
herein  are for  reference  purposes  only,  and shall not in any way affect the
meaning or interpretation of this Agreement.

     Section  12.7  Confidentiality.  Unless  and until the  Closing  shall have
occurred  and  except  as may be  required  in  connection  with (i) any  public
announcement that Omnicom, OmniSub and the Company have executed this Agreement,
or (ii) any governmental  filings  contemplated  under this Agreement,  Omnicom,
OmniSub and the Company  shall,  and shall  cause  their  respective  employees,
agents,  consultants  and  representatives  to,  maintain in confidence  and not
otherwise use or permit the use of information,  documents,  and data respecting
any other party to this Agreement  furnished to them, or to any person or entity
on their behalf. If this Agreement is terminated pursuant to Section 10.1 hereof
or  otherwise,  each party shall (and Omnicom and OmniSub  shall cause any third
party to whom it has made  permitted  disclosures  to) (i)  return  to the other
party or destroy all written information, documents, and data furnished to it or
to any person or entity on its  behalf,  and (ii)  maintain  in  confidence  all
information  received by it, or by any person or entity on its behalf, and shall
not use or permit  the use of such  information  by others  except to the extent
that  such  information  is  elsewhere  available  to the  public  or  otherwise
rightfully  obtained  without  violation  of  this  Section  12.7  or any  other
agreement.  Notwithstanding  the foregoing,  the foregoing  provision  shall not
apply to the extent that  Omnicom is required to make any  announcement  or file
information  relating  to or  arising  out of this  Agreement  by  virtue of the
federal  securities  laws of the  United  States or the  rules  and  regulations
promulgated  thereunder or other rules of the New York Stock Exchange, or to any
announcement by any party pursuant to applicable law or regulations.

                                       43
<PAGE>

     Section  12.8  Notices.  Unless  otherwise  provided  herein,  any  notice,
request, instruction or other document to be given hereunder by any party to any
other  party shall be in writing and shall be deemed to have been given (a) upon
personal  delivery,  if  delivered  by hand,  (b) three  days  after the date of
deposit in the mails,  postage prepaid, if mailed by certified first class mail,
or (c) the next  business day if sent by facsimile  transmission  (if receipt is
electronically confirmed) or by a prepaid overnight courier service, and in each
case at the  respective  addresses  or  numbers  set forth  below or such  other
address or number as such party may have fixed by notice:  

     If to either Omnicom or to OmniSub, addressed to:

               Omnicom Group Inc.
               437 Madison Avenue
               New York, New York 10022
               Attention:           Secretary
               Fax: (212) 415-3670

               with a copy to:

               Davis & Gilbert
               1740 Broadway
               New York, New York 10019
               Attention:           Michael D. Ditzian, Esq.
               Fax: (212) 468-4888

     If to the Company, addressed to:

               Ketchum Communications Holdings, Inc.
               Six PPG Place
               Pittsburgh, PA 15222-5488
               Attention:           Chief Executive Officer
               Fax: (412) 456-3588

               with a copy to:

               Babst Calland Clements and Zomnir
               Two Gateway Center
               Pittsburgh, Pennsylvania 15222
               Attention:           Ronald W. Frank, Esq.
               Fax: (412) 394-6576

     Section  12.9  Parties  in  Interest.  This  Agreement  and the  rights and
obligations  of the  parties  hereunder  shall not be  assignable  to any Person
without the written consent of all parties.

     Section 12.10 Severability. In the event any provision of this Agreement is
found to be void and  unenforceable  by a court of competent  jurisdiction,  the
remaining  provisions of this Agreement  shall  nevertheless be binding upon the
parties with the same effect as though the void or  unenforceable  part had been
severed and deleted.

                                       44
<PAGE>

     Section 12.11  Counterparts.  This Agreement may be executed in two or more
counterparts, all of which taken together shall constitute one instrument.

     Section 12.12 Entire Agreement. This Agreement, including the Schedules and
Exhibits,  and other  documents  referred  to herein  which form a part  hereof,
contains  the entire  understanding  of the parties  hereto with  respect to the
subject matter contained herein and therein. The Company makes no representation
or warranty to Omnicom or OmniSub  except as set forth in this Agreement and the
Schedules  hereto.  This  Agreement   supersedes  all  prior  oral  and  written
agreements and  understandings  between the parties with respect to such subject
matter.

     Section 12.13 Amendment.  This Agreement and the Schedules  attached hereto
or heretofore delivered may be amended,  supplemented or modified by the parties
hereto only by an agreement  in writing  signed on behalf of each of the parties
hereto following due authorization at any time.

     Section  12.14 Third Party  Beneficiaries.  Each party hereto  intends that
this Agreement shall not benefit or create any right or cause of action in or on
behalf  of any  person  other  than the  parties  hereto  and  their  respective
successors and assigns as permitted under Section 12.9.

     Section 12.15 Extension;  Waiver. The Company, on the one hand, and Omnicom
(on behalf of itself and  OmniSub),  on the other hand,  each may, by instrument
duly  authorized in writing signed on behalf of each party,  (a) extend the time
for performance of any of the obligations or other acts of such other party, (b)
waive any inaccuracies in the representations and warranties of such other party
contained herein or in any document  delivered pursuant hereto, or (c) except as
set  forth  in the  first  paragraph  of each of  Articles  VIII  and IX,  waive
compliance  with  any of the  agreements  or  conditions  of  such  other  party
contained  herein.  No such waiver or  extension  shall be  effective  unless in
writing (and  specifically  describing the provision or provisions being waived)
and  signed by the party or  parties  sought to be bound  thereby,  and any such
waiver or extension on a specific occasion shall not imply a waiver or extension
on a future occasion.

     Section  12.16  Exchange  Rate;  Use of  Terms.  Where  a  Section  of this
Agreement  provides  amounts in U.S.  Dollars for  purposes of  determining  the
disclosures required to be made thereunder, it is understood that the equivalent
amounts in foreign currencies shall be calculated based on the exchange rates in
effect at the close of business on December 31, 1995.  Similarly,  references to
any U.S. legal term for any action, remedy, method of judicial proceeding, legal
document,  legal  status,  court,  official or any other legal  concept or thing
shall in respect of any jurisdiction  other than the United States, be deemed to
include what nearly approximates in that jurisdiction to the U.S. legal term.



                                       45
<PAGE>

     IN WITNESS WHEREOF,  Omnicom,  OmniSub and the Company have each caused its
corporate  name  to  be  hereunto  subscribed  by  its  officer  thereunto  duly
authorized on the day and year first above written.


                                            OMNICOM GROUP INC.

                                            By:
                                               -------------------------------


                                            KCI ACQUISITION INC.

                                            By:
                                               -------------------------------


                                            KETCHUM COMMUNICATIONS
                                             HOLDINGS, INC.

                                            By:
                                               -------------------------------






                                       46


                                                                      
                                ESCROW AGREEMENT

     ESCROW AGREEMENT, dated ___________,  1996 (the "Escrow Agreement"),  among
OMNICOM GROUP INC., a New York corporation  ("Omnicom");  KETCHUM COMMUNICATIONS
HOLDINGS, INC., a Pennsylvania corporation (the "Surviving  Corporation");  PAUL
H. ALVAREZ, as Representative (the  "Representative") of the former shareholders
of Ketchum  Communications  Holdings,  Inc.,  a  Pennsylvania  corporation  (the
"Company");  and THE CHASE  MANHATTAN  BANK,  N.A., as Escrow Agent (the "Escrow
Agent").

     Omnicom,  KCI Acquisition Inc. ("OmniSub") and the Company are parties to a
certain  Agreement  and  Plan  of  Merger  dated  March  __  1996  (the  "Merger
Agreement"),  pursuant to which Omnicom  acquired the Company through the merger
of OmniSub with and into the Company.  Under the Merger  Agreement,  the Company
has  made  certain  representations  and  warranties,   and  undertaken  certain
obligations,   to  Omnicom,   and  the  former   shareholders   of  the  Company
(collectively referred to herein as the "Shareholders") through the mechanism of
this Escrow  Agreement  have  approved the  indemnification  of Omnicom  against
certain  Losses  which  Omnicom or other  Indemnified  Parties may sustain or to
which Omnicom or other  Indemnified  Parties may be subjected (as more fully set
forth  in  the  Merger  Agreement).   Pursuant  to  the  Merger  Agreement,  the
Shareholders  have approved the creation of an "Escrow Fund" in accordance  with
the terms of this  Agreement to secure Omnicom  against such Losses.  Any claims
made by Omnicom against the Escrow Fund are herein collectively called "Claims",
and individually a "Claim"; however, a Claim shall become reimbursable hereunder
only if,  and to the  extent  that,  it  becomes  a  "Final  General  Claim  for
Reimbursement",  as defined in Section 2.2 hereof, or a "Final Special Claim for
Reimbursement",  as defined in Section 4.2 hereof.  Terms  defined in the Merger
Agreement  that  are not  otherwise  defined  herein  are used  herein  with the


                                       
<PAGE>
meanings  ascribed to them therein;  a list of such terms is attached  hereto as
Exhibit 1.

     The  appointment  of the  Representative  and  the  terms  of  this  Escrow
Agreement were approved by the  Shareholders of the Company at a Special Meeting
of Shareholders held on May __, 1996.

     Accordingly, the parties hereby agree as follows:

1. ESTABLISHMENT OF ESCROW FUND

     1.1 Establishment of Escrow Fund. Simultaneously herewith,  pursuant to the
Merger  Agreement,  Chemical  Mellon  Shareholder  Services,  in accordance with
instructions from Omnicom,  is depositing with the Escrow Agent on behalf of the
Shareholders,   certificates   registered  in  the  name  of  the  Shareholders,
representing  in the  aggregate  the number of shares of Omnicom Stock set forth
opposite  each  Shareholder's  name  in  Schedules  A  and  B  hereto,  and  the
Representative  (on behalf of the  Shareholders)  is depositing  stock powers in
respect of such  certificates,  duly executed in blank.  Such Omnicom Stock, and
any other property  distributable  with respect thereto or in exchange  therefor
and held in the Escrow  Fund as  provided  in  Section  7.2  hereto,  are herein
collectively referred to as the "Common Stock". The Escrow Fund shall be held by
the Escrow Agent and shall be dealt with by the Escrow Agent in accordance  with
the terms and conditions of this Escrow Agreement.

     1.2 Specific  Funds within the Escrow Fund.  The Omnicom Stock set forth in
Schedule A hereto ( _______  shares of Omnicom  Stock having an aggregate  value
(computed in accordance with Section 6.1 hereof) of $4,400,000) shall constitute
that  portion of the Escrow Fund which is sometimes  hereinafter  referred to as
the "General Escrow Fund";  and the Omnicom Stock set forth in Schedule B hereto
( ________  shares of Omnicom  Stock  having an  aggregate  value  (computed  in
accordance with Section 6.1 hereof) of $2,500,000) shall constitute that portion
of the Escrow Fund which is  sometimes  hereinafter  referred to as the "Special
Escrow Fund".


                                        2
<PAGE>

2. PROCEDURES WITH RESPECT TO GENERAL CLAIMS

     2.1 General  Claims by Omnicom.  (a) If an  Indemnified  Party has a Claim,
including a Claim arising from a suit, action,  proceeding or investigation by a
third party that may result in any Losses  under  clause (a) of Section  11.2 of
the Merger  Agreement  ("General  Losses" and the Claims with  respect  thereto,
"General  Claims"),  Omnicom  shall give notice  thereof  (the  "General  Claims
Notice")  substantially  in the form of and in conformity with the  instructions
contained in Exhibit 2 hereto to the Representative and to the Escrow Agent. The
General  Claims Notice shall  describe the General  Claim in reasonable  detail,
shall indicate the amount (estimated,  if necessary, and to the extent feasible)
of the  General  Losses that have been or may be suffered by Omnicom and for the
applicable  Indemnified  Party,  as the case  may be.  General  Losses  shall be
reimbursed solely out of the General Escrow Fund.

     (b) Within 30 days after  Omnicom shall give the  Representative  a General
Claims Notice (or sooner, if the nature of the Asserted  Liability so requires),
the  Representative,  by notice to Omnicom  with a copy to the Escrow Agent (the
"Representative's  Notice"),  either  shall (i) concede  liability in whole with
respect to such General Claim, (ii) demand that an arbitration  proceeding under
Section 13 hereof be held to determine whether such General Claim is one covered
by Section 11.2(a) of the Merger  Agreement and this Escrow  Agreement and/or in
the case of matters other than Third Party Claims to determine the amount of the
General Claim, or (iii) concede liability in part and demand such arbitration in
part.  The failure by the  Representative  to give the  Representative's  Notice
within the specified  period shall be deemed a concession of liability in whole.
The  Representative  shall be  afforded  reasonable  access  by  Omnicom  to the
documentation  relating to any Asserted  Liability  included in a General Claims
Notice  as  may  under  the   circumstances   reasonably   be  required  by  the
Representative to make a determination required to be made by the Representative
under this Section 2.1.



                                       3
<PAGE>

     2.2 Final General  Claims for  Reimbursement.  All General Claims for which
the Representative  shall have conceded liability,  or shall have been deemed to
have conceded  liability  pursuant to the  provisions  of Section 2.1,  shall be
final and binding upon the  Representative,  the  Shareholders,  Omnicom and the
Surviving  Corporation.  If  the  Representative  shall  demand  arbitration  as
provided in Section  2.1,  the General  Claim that was  objected to shall become
final and binding upon Omnicom,  the Surviving  Corporation,  the Representative
and the  Shareholders  upon (a) a final  decision in  arbitration as provided in
Section 13 hereof,  or (b) upon the matter being otherwise  agreed to in writing
by Omnicom and the  Representative.  A General  Claim which is final and binding
upon Omnicom, the Surviving Corporation, the Shareholders and the Representative
as of  any  given  time  is  hereinafter  called  a  "Final  General  Claim  for
Reimbursement".

     2.3 Limitation of General Claims.  Notwithstanding anything to the contrary
herein,  none of the  General  Escrow  Fund will be released  and  delivered  to
Omnicom  pursuant to any General Claim (other than a General Claim under Section
3.27 or 3.28 or the last  sentence  of Section  3.19.3 of the Merger  Agreement)
except to the extent that the aggregate  amount of all Final General  Claims for
Reimbursement  (ignoring any General  Claim(s) under Section 3.27 or 3.28 or the
last  sentence  of Section  3.19.3 of the Merger  Agreement)  exceeds the sum of
$100,000 and then only to the extent of such excess.  As a General Claim becomes
a Final General Claim for Reimbursement,  Omnicom and the Representative (or the
arbitrator,  as  the  case  may  be)  shall  provide  the  Escrow  Agent  with a
certificate  with  respect  to the  compliance  of the Final  General  Claim for
Reimbursement with this Section 2.3.

3. DISTRIBUTIONS FROM GENERAL ESCROW FUND

     3.1 Definitions.  As used herein:  "First General  Distribution Date" shall
mean the business day next  following the earlier of (i) the date  following the
first  independent  audit  report,  if  any,  of the  financial  results  of the
Surviving  Corporation  following the  Effective  Time or (ii) one year from the
date hereof; and "Final General Distribution Date" shall mean the first business


                                       4
<PAGE>

day on which all matters  reserved  against in respect of General  Claims  shall
have been finally  determined or settled.  If no matters are or remain  reserved
against on the First General  Distribution Date, the First General  Distribution
Date shall  also be the Final  General  Distribution  Date.  Omnicom  shall give
notice to the Escrow  Agent,  with a copy to the  Representative,  five business
days prior to the occurrence of the First General Distribution Date.

     3.2  Reimbursement of Final General Claims for  Reimbursement  Before or On
First General  Distribution  Date. From the date of this Escrow Agreement to and
including the First  General  Distribution  Date,  the Escrow Agent from time to
time shall  (subject to Section 2.3) transfer and deliver to Omnicom such number
of shares of Common Stock forming the General  Escrow Fund as shall have a value
(computed  in  accordance  with Section 6.1 hereof)  equal to the Final  General
Claims  for  Reimbursement  which  have not  previously  been  paid to  Omnicom;
provided  however,  that in no event shall Omnicom receive any distribution from
the General  Escrow Fund prior to such time as Omnicom  releases  and  publishes
financial  results  of the  combined  operations  of Omnicom  and the  Surviving
Corporation  covering a period of at least 30 days after the  Effective  Time of
the Merger (such time being hereinafter  referred to as the "Publication Date").
Omnicom  shall  promptly  give notice (the  "Publication  Notice") to the Escrow
Agent, with a copy to the Representative,  of the release and publishing of such
financial  results and the occurrence of the Publication  Date  substantially in
the form of Exhibit 3 hereto including an authorization and direction to release
the shares of Omnicom Stock set forth on Schedule C hereto; and within five days
after the  Publication  Date,  the  Escrow  Agent  shall mail or deliver to each
Company  Affiliate (as such term is used in Section 8) the stock  certificate(s)
identified next to his or her name on Schedule C hereto.

     3.3 Reservation of Amounts at First General Distribution Date. On the First
General  Distribution Date, the Escrow Agent shall reserve in the General Escrow
Fund such number of shares of Common  Stock as shall have a value  (computed  in
accordance with Section 6.1 hereof) equal to the sum of (i) an amount in respect


                                       5
<PAGE>

of the amounts  claimed in all General  Claims Notices given pursuant to Section
2.1 hereof which have not become Final Claims for  Reimbursement,  but which are
still asserted by Omnicom and are then pending and undecided  ("Pending  General
Claims") as set forth in a  certificate  signed by Omnicom and  delivered to the
Escrow  Agent  (provided,  that if the  Representative  does  not  agree on such
amount,  the dispute shall be submitted by the  Representative to arbitration in
accordance with Section 13 hereof and the  determination of the arbitrator shall
be final and conclusive;  and further provided that pending the determination of
the  arbitrator,  the amount to be  reserved  shall be the amount  certified  in
writing to the Escrow Agent by Omnicom);  and (ii) the  aggregate  amount of all
Final General Claims for Reimbursement not theretofore paid to Omnicom.

     3.4  Distribution  at  First  General   Distribution  Date.  On  the  First
Distribution  Date,  the Escrow Agent shall  deliver to Omnicom from the General
Escrow Fund any shares  reserved  pursuant  to 3.3(ii) and shall  deliver to the
Shareholders in accordance with their  respective  interests that portion of the
General  Escrow Fund equal to the entire  amount of the  General  Escrow Fund as
originally  deposited in accordance  with Section 1 hereof,  less the sum of (a)
all  amounts  theretofore  delivered  from the  General  Escrow  Fund to Omnicom
pursuant  to Section  3.2 hereof or this  Section  3.4 and (b) the amount of the
General Escrow Fund reserved pursuant to Section 3.3(i) hereof. If the foregoing
calculation  results in a negative amount, no portion of the General Escrow Fund
shall be delivered to the Shareholders at the First General Distribution Date.

     3.5  Distributions  As to Pending  General  Claims After the First  General
Distribution  Date. After the First General  Distribution  Date, as each Pending
General Claim reserved for on the First General  Distribution Date becomes (x) a
Final General Claim for Reimbursement, or (y) is withdrawn by Omnicom, or (z) is
determined  pursuant to a final decision in arbitration (as described in Section
13) not to be a proper General Claim, the Escrow Agent shall, subject to Section
2.3, deliver (a) to Omnicom, such number of shares of Common Stock as shall have



                                       6
<PAGE>

a value  (computed in  accordance  with  Section 6.1 hereof)  equal to the Final
General Claim for  Reimbursement  which results from the  determination  of such
Pending  General  Claim (and not  previously  paid to  Omnicom),  and (b) to the
Shareholders  in  accordance  with their  respective  interests,  such number of
shares  of Common  Stock as shall  have a value  (computed  in  accordance  with
Section  6.1 hereof)  equal to the amount,  if any, of the excess of the reserve
for such Pending  General Claim over the Final General Claim for  Reimbursement,
if any, with respect to such Pending General Claim;  provided,  however, that no
delivery shall be made hereunder to the Shareholders unless the aggregate amount
reserved  (after giving effect to such delivery) for all Pending  General Claims
is at least equal to the aggregate amount of such Pending General Claims.

     3.6 Distribution at Final General  Distribution  Date. On the Final General
Distribution  Date,  the Escrow  Agent shall  deliver to Omnicom  such number of
shares  of Common  Stock as shall  have a value  (computed  in  accordance  with
Section 6.1 hereof and subject to Section 2.3 hereof) equal to the Final General
Claims for  Reimbursement  which have not previously  been paid to Omnicom,  and
shall deliver to the Shareholders in accordance with their respective  interests
the balance, if any, of the General Escrow Fund.

4. PROCEDURES WITH RESPECT TO SPECIAL ESCROW FUND

     4.1 Special Claims by Omnicom. (a) If an Indemnified Party has a Claim that
may  result  in any  Losses  under  clause  (b) of  Section  11.2 of the  Merger
Agreement  ("Special  Losses"  and the Claims  with  respect  thereto,  "Special
Claims"),  Omnicom  shall give notice  thereof  (the  "Special  Claims  Notice")
substantially in the form of and in conformity with the  instructions  contained
in Exhibit 2 hereto to the  Representative  and to the Escrow Agent. The Special
Notice shall describe the Special Claim in reasonable detail, shall indicate the
amount  (estimated,  if  necessary,  and to the extent  feasible) of the Special
Losses  that have been or may be  suffered  by  Omnicom  and for the  applicable
Indemnified Party, as the case may be. Special Losses shall be reimbursed solely
out of the Special Escrow Fund.

                                       7
<PAGE>

     (b) Within 30 days after  Omnicom shall give the  Representative  a Special
Claims Notice (or sooner, if the nature of the Asserted  Liability so requires),
the Representative shall give a Representative's Notice in which he shall either
(a)  concede  liability  with  respect to the  Special  Claim or (b) if he shall
dispute the Special Claim demand that an arbitration proceeding under Section 13
be held to resolve such dispute.  The failure of the  Representative to give the
Representative's Notice within the specified period shall be deemed a concession
of  liability  in whole with respect to the Special  Claim.  The  Representative
shall be afforded reasonable access by Omnicom to the documentation  relating to
a Special  Claim as may under the  circumstances  reasonably  be required by the
Representative to make a determination required to be made by the Representative
under this Section 4.1.

     4.2 Final Special Claims for  Reimbursement.  A Special Claim for which the
Representative shall have conceded liability,  or shall have been deemed to have
conceded liability pursuant to the provisions of Section 4.1, shall be final and
binding upon the  Representative,  the  Shareholders,  Omnicom and the Surviving
Corporation.  If the  Representative  shall  demand  arbitration  as provided in
Section 4.1, the Special Claim shall become final and binding upon Omnicom,  the
Surviving Corporation,  the Representative and the Shareholders upon (a) a final
decision in arbitration as provided in Section 13 hereof, or (b) upon the matter
being  otherwise  agreed to in  writing  by Omnicom  and the  Representative.  A
Special  Claim  which  is  final  and  binding  upon   Omnicom,   the  Surviving
Corporation,  the  Shareholders and the  Representative  as of any given time is
hereinafter called a "Final Special Claim for Reimbursement".

5. DISTRIBUTIONS FROM SPECIAL ESCROW FUND

     5.1 Definitions.  As used herein:  "First Special  Distribution Date" shall
mean the business day next  following  December  31,  1996;  and "Final  Special
Distribution  Date"  shall  mean the first  business  day on which  all  matters
reserved against in respect of Special Claims shall have been finally determined


                                       8
<PAGE>


or settled.  If no matters are or remain  reserved  against on the First Special
Distribution  Date, the First Special  Distribution Date shall also be the Final
Special Distribution Date.

     5.2  Reimbursement of Final Special Claims for  Reimbursement  Before or On
First Special  Distribution  Date. From the date of this Escrow Agreement to and
including the First  Special  Distribution  Date,  the Escrow Agent from time to
time shall transfer and deliver to Omnicom such number of shares of Common Stock
forming the Special  Escrow Fund as shall have a value  (computed in  accordance
with Section 6.1 hereof)  equal to the Final  Special  Claims for  Reimbursement
which have not previously  been paid to Omnicom;  provided  however,  that in no
event shall Omnicom receive any distribution  from the Special Escrow Fund prior
to the Publication Date.

     5.3 Reservation of Amounts at First Special Distribution Date. On the First
Special  Distribution Date, the Escrow Agent shall reserve in the Special Escrow
Fund such number of shares of Common  Stock as shall have a value  (computed  in
accordance with Section 6.1 hereof) equal to the sum of (i) an amount in respect
of the amounts  claimed in all Special  Claims Notices given pursuant to Section
4.1 hereof which have not become Final Claims for  Reimbursement,  but which are
still asserted by Omnicom and are then pending and undecided  ("Pending  Special
Claims") as set forth in a  certificate  signed by Omnicom and  delivered to the
Escrow  Agent  (provided,  that if the  Representative  does  not  agree on such
amount,  the dispute shall be submitted by the  Representative to arbitration in
accordance with Section 13 hereof and the  determination of the arbitrator shall
be final and conclusive;  and further provided that pending the determination of
the  arbitrator,  the amount to be  reserved  shall be the amount  certified  in
writing to the Escrow Agent by Omnicom);  and (ii) the  aggregate  amount of all
Final Special Claims for Reimbursement not theretofore paid to Omnicom.

     5.4 Distribution at First Special  Distribution  Date. On the First Special
Distribution  Date,  the Escrow Agent shall  deliver to Omnicom from the Special
Escrow Fund any shares  reserved  pursuant  to 5.3(ii) and shall  deliver to the
Shareholders in accordance with their  respective  interests that portion of the


                                       9
<PAGE>

Special  Escrow Fund equal to the entire  amount of the  Special  Escrow Fund as
originally  deposited in accordance  with Section 1 hereof,  less the sum of (a)
all  amounts  theretofore  delivered  from the  Special  Escrow  Fund to Omnicom
pursuant  to Section  5.2 hereof or this  Section  5.4 and (b) the amount of the
Special Escrow Fund reserved pursuant to Section 5.3(i) hereof. If the foregoing
calculation  results in a negative amount, no portion of the Special Escrow Fund
shall be delivered to the Shareholders at the First Special Distribution Date.

     5.5  Distributions  As to Pending  Special  Claims After the First  Special
Distribution  Date. After the First Special  Distribution  Date, as each Pending
Special Claim reserved for on the First Special  Distribution Date becomes (x) a
Final Special Claim for Reimbursement, or (y) is withdrawn by Omnicom, or (z) is
determined  pursuant to a final decision in arbitration (as described in Section
13) not to be a proper  Special  Claim,  the Escrow  Agent shall  deliver (a) to
Omnicom,  such number of shares of Common Stock as shall have a value  (computed
in  accordance  with Section 6.1 hereof)  equal to the Final  Special  Claim for
Reimbursement which results from the determination of such Pending Special Claim
(and not previously paid to Omnicom),  and (b) to the Shareholders in accordance
with their respective interests,  such number of shares of Common Stock as shall
have a value  (computed  in  accordance  with  Section 6.1 hereof)  equal to the
amount, if any, of the excess of the reserve for such Pending Special Claim over
the Final Special Claim for Reimbursement,  if any, with respect to such Pending
Special Claim;  provided,  however,  that no delivery shall be made hereunder to
the  Shareholders  unless the aggregate  amount reserved (after giving effect to
such delivery) for all Pending Special Claims is at least equal to the aggregate
amount of such Pending Special Claims.

     5.6 Distribution at Final Special  Distribution  Date. On the Final Special
Distribution  Date,  the Escrow  Agent shall  deliver to Omnicom  such number of
shares  of Common  Stock as shall  have a value  (computed  in  accordance  with
Section 6.1 hereof) equal to the Final Special  Claims for  Reimbursement  which
have not previously been paid to Omnicom,  and shall deliver to the Shareholders


                                       10
<PAGE>

in  accordance  with their  respective  interests  the  balance,  if any, of the
Special Escrow Fund.

6. PROCEDURES WITH RESPECT TO DISTRIBUTION

     6.1  Valuation.  For all purposes of this Escrow  Agreement,  each share of
Omnicom Stock shall be valued at $________.(1) If, at any time after the Closing
Date and prior to the date of any  distribution  of Common Stock,  Omnicom shall
effect a stock  dividend,  stock split or  combination  of the Common Stock,  or
other   recapitalization   affecting  the  Common  Stock,   or  shall  effect  a
distribution  (other than a  distribution  of cash  dividends  as  described  in
Section 7.1 hereof) with respect to the Common Stock,  or if Omnicom shall fix a
record date falling on or prior to the date of any  distribution of Common Stock
from the Escrow  Fund for any such stock  dividend,  stock  split,  combination,
recapitalization,  or  distribution  to  take  place  after  the  date  of  such
distribution, the foregoing valuation shall be adjusted appropriately by Omnicom
(but  subject to  arbitration  in  accordance  with Section 13 in the event of a
dispute).

     6.2 Fractional  Shares.  No fractional  shares of the Common Stock shall be
issued or  delivered  pursuant to any  provision  of this Escrow  Agreement.  In
making delivery of the Common Stock to Omnicom or the Representative, the Escrow
Agent  shall  round off (up or down) any  fractional  share  resulting  from any
calculation hereunder to the nearest whole share.

     6.3 Allocation. To the extent practicable all distributions made under this
Escrow Agreement from the General Escrow Fund or the Special Escrow Fund, as the
case may be, and  whether  payable to Omnicom or to the  Shareholders,  shall be
taken proportionately from the Common Stock held in such Fund, registered in the
name of each  Shareholder  as his respective  interest  appears on Schedule A or
Schedule B hereto, respectively.

- --------
(1) Insert the Market Value (as defined in the Merger Agreement) 


                                       11
<PAGE>

     6.4 Distribution  Consent.  Any other provision of this Escrow Agreement to
the contrary notwithstanding,  the Escrow Agent shall distribute the Escrow Fund
in such manner at such time or times as Omnicom and the  Representative  may, in
writing, jointly direct.

     6.5 No  Recourse.  Anything  contained  in  this  Escrow  Agreement  to the
contrary  notwithstanding,  none  of the  Indemnified  Parties  shall  have  any
recourse  for any Losses  arising  under  Section  11.2 of the Merger  Agreement
against past, present or future directors, officers or employees of the Company,
the  Shareholders,  or the  Representative,  nor  shall any of such  persons  be
personally  liable for any such Losses,  it being expressly  understood that the
sole remedy of the  Indemnified  Parties  for such  Losses  shall be against the
Escrow Fund in accordance with this Escrow Agreement.

7. DIVIDENDS AND OTHER DISTRIBUTIONS; VOTING RIGHTS

     7.1 Cash Dividends. All cash dividends in respect of the Common Stock still
then held in escrow, and all other  distributions in respect of the Common Stock
still then held in escrow that are  taxable  dividends  for  Federal  income tax
purposes (net of any taxes  required to be withheld from such cash  dividends or
other  distributions  by  Omnicom),  shall be paid  directly  to the  applicable
Shareholder and shall be the sole property of such  Shareholder,  and the Escrow
Agent  shall have no duty,  liability  or  obligation  whatsoever  with  respect
thereto.

     7.2 Distributions. Distributions of any kind, other than those described in
Section 7.1, shall be made by Omnicom,  if  practicable,  directly to the Escrow
Agent or, if made to any  Shareholder,  shall be delivered by such  Shareholder,
upon request from Omnicom,  to the Escrow Agent. All such distributions shall be
held in escrow  pursuant to the  provisions  of this Escrow  Agreement,  but the
Escrow Agent shall have no duty or  obligation  whatsoever  to require that such
distributions be delivered to it. Any delivery of the Common Stock to Omnicom or
the Representative  after any and all such distributions  shall be appropriately
adjusted  so that  the  distributees  will be in the  same  position  as if such
distributees had been, on any record date for any such distribution with respect

                                       12
<PAGE>

to the Common  Stock,  the  holders of record of the number of shares of Omnicom
Stock distributable to them prior to any such distributions.

     7.3 Voting.  Each  Shareholder  shall be  entitled  to exercise  all voting
rights with respect to the Common Stock  registered in his name and constituting
the Escrow Fund so long as such Common Stock continues to be held in escrow, and
the Escrow  Agent shall  deliver to such  Shareholder  any proxies  with respect
thereto which the Escrow Agent receives.

8. COMPANY AFFILIATES' DEPOSIT OF OMNICOM STOCK

     Simultaneously  herewith,  pursuant to the Merger Agreement and paragraph 3
of the Affiliates Representation Letter referred to in Section 7.2 of the Merger
Agreement,  all of the shares of Omnicom Stock issued to the Company  Affiliates
under Article II of the Merger  Agreement  have been  deposited  with the Escrow
Agent.  All such  shares of Omnicom  Stock not part of the Escrow  Fund shall be
subject  to the  provisions  of  Section 7 and  Sections  10  through 15 of this
Agreement;  and shall be released by the Escrow Agent within five days after the
Publication  Date by the mailing or delivery to each  Company  Affiliate  of the
stock certificate(s) identified next to his or her name on Schedule C hereto.

9. SECURITY INTEREST IN ESCROW FUND

     (a) The  Shareholders  hereby grant to Omnicom a first  priority  perfected
security  interest  in  the  Escrow  Fund  to  secure  the  performance  of  the
indemnification  obligations under Section 11.2 of the Merger Agreement and this
Escrow  Agreement.  The Escrow Agreement shall  constitute a security  agreement
under applicable law.

     (b) The parties  agree that this security  interest  shall attach as of the
execution of this Escrow  Agreement.  The parties agree that, for the purpose of
perfecting  Omnicom's security interest in the above designated Escrow Fund held
by the Escrow Agent pursuant to this Escrow  Agreement,  Omnicom  designates the
Escrow  Agent to acquire and maintain  possession  of the Escrow Fund and act as


                                       13
<PAGE>

bailee for Omnicom with notice of Omnicom's  security  interest in said property
under the Uniform Commercial Code and that by possession of the Escrow Fund, the
Escrow Agent acknowledges that it holds the Escrow Fund for Omnicom for purposes
of perfecting the security  interest.  The  Representative  and the Escrow Agent
shall take all other actions requested by Omnicom to maintain the perfection and
priority of the security  interest in the Escrow Fund;  provided that the Escrow
Agent and the  Representatives  do not make any  representation or warranty with
regard to the  creation  or  perfection,  hereunder  or  otherwise,  of any such
security  interest,  and shall have no  responsibility  at any time to ascertain
whether or not any security interest exists.

     (c) Omnicom  shall  release the security  interest  herein  granted and the
security  interest shall be terminated to the extent of any  disbursement of the
Escrow  Fund  hereunder  by Escrow  Agent in  accordance  with the terms of this
Escrow Agreement.  Upon final  disbursement of the Escrow Fund to Omnicom or the
Shareholders,  Omnicom  shall do all acts and  things  reasonably  necessary  to
release and extinguish such security interest.  The parties hereto  specifically
agree that the grant of this security  interest pursuant to this Section 8 shall
not in any way modify the procedures the parties hereto must follow with respect
to the release of Common Stock from the Escrow Fund.

10. ESCROW AGENT'S DUTIES AND FEES

     10.1 Duties  Limited.  The Escrow  Agent  undertakes  to perform  only such
duties as are expressly set forth herein,  and shall not be required to refer to
the Purchase  Agreement in carrying out its duties  hereunder.  The Escrow Agent
shall not be bound by, or have any  responsibility  with  respect  to, any other
agreement  between any of the  parties.  The Escrow  Agent shall have no duty or
responsibility  with regard to any loss resulting from the decline in the market
value of the Escrow Fund in  accordance  with the terms of this  Agreement.  The
Escrow Agent need not maintain any insurance with respect to the Escrow Fund.

     10.2 Reliance. The Escrow Agent, acting (or refraining from acting) in good
faith, shall not be liable for any mistake of fact or error of judgment by it or


                                       14
<PAGE>

for any acts or omissions by it of any kind unless caused by gross negligence or
willful  misconduct,  and the Escrow  Agent may rely,  and shall be protected in
acting or  refraining  from  acting,  upon any written  notice,  instruction  or
request  furnished to it hereunder  and believed by it to be genuine and to have
been signed or presented by the proper party or parties;  provided  that, as set
forth below, modification of this Escrow Agreement shall be signed by all of the
parties  hereto.  The  Escrow  Agent is hereby  authorized  to  comply  with any
judicial  order or legal  process  which  stays,  enjoins,  directs or otherwise
affects  the  transfer  or  delivery of any part of the Escrow Fund to any party
hereto and shall incur no  liability  for any delay or loss which may occur as a
result of such compliance.

     10.3 Good Faith. Each of Omnicom and the  Representative,  on behalf of the
Shareholders,  jointly and  severally,  hereby  agrees to  indemnify  the Escrow
Agent, its officers,  directors, agents or employees for, and to hold the Escrow
Agent, its officers,  directors,  agents or employees for, harmless against, any
loss,  liability,  expense (including  reasonable attorneys' fees and expenses),
third party claim and demand,  incurred by it without  gross  negligence  or bad
faith on its part,  arising out of or in connection  with its entering into this
Escrow  Agreement and the carrying out of its duties  hereunder and in any event
its liability  shall be limited to direct damages and shall not include  special
or consequential damages; 50% of any such losses shall be payable by Omnicom and
50% shall be payable by the  Representative on behalf of the  Shareholders.  The
Escrow Agent may consult with counsel of its own choice, and shall have full and
complete  authorization  and  protection  for any action taken or suffered by it
hereunder in good faith and in accordance with the opinion of such counsel.  The
foregoing  indemnification  shall survive the resignation of the Escrow Agent or
the termination of this Escrow Agreement.

     10.4 Successor Escrow Agents. The Escrow Agent may resign and be discharged
from its duties or  obligations  hereunder at any time by giving 30 days' notice
in  writing  of  such  resignation  to  the  Representative  and  Omnicom.   The


                                       15
<PAGE>

Representative  and Omnicom,  together,  shall have the right to  terminate  the
appointment  of the Escrow Agent  hereunder by giving to it notice in writing of
such  termination  specifying  the date upon which such  termination  shall take
effect.  In either such event,  the  Representative  and Omnicom hereby agree to
promptly appoint a successor escrow agent; if the Representative and Omnicom are
unable to  appoint a  successor  escrow  agent  within 25 days  after the Escrow
Agent's  notice  of  resignation,  the  Escrow  Agent  may  petition  a court of
competent  jurisdiction  to appoint a successor.  The parties hereto agree that,
upon demand of such  successor  escrow  agent,  all  property in the Escrow Fund
shall be  turned  over and  delivered  to such  successor  escrow  agent,  which
thereupon  shall become bound by all of the provisions  hereof.  Notwithstanding
any of the foregoing,  no  appointment of a successor  Escrow Agent shall become
effective until all fees, charges and expenses of the original Escrow Agent have
been  paid.  The  original  Escrow  Agent  will  not be  liable  for the acts or
omissions of any successor hereunder.

     10.5 Fees and Expenses.  Omnicom and the Surviving  Corporation each agrees
to pay to the Escrow Agent one-half of the fees  determined in accordance  with,
and payable as specified in, the Schedule of Fees attached  hereto as Attachment
1 as compensation  for the services to be rendered by it hereunder and to pay or
reimburse  the  Escrow  Agent for all  reasonable  expenses,  disbursements  and
advances  (including  reasonable  attorneys'  fees)  incurred  or  made by it in
connection with the carrying out of its duties hereunder.

11. WAIVERS

     This Escrow  Agreement may be amended,  superseded or canceled,  and any of
the terms or  conditions  hereof  may be  waived,  only by a written  instrument
executed by the parties hereto or, in the case of a waiver, by the party waiving
compliance. The failure of any party at any time or times to require performance
of any  provision  hereof shall in no manner affect the right of such party at a
later time to enforce the same.  No waiver of any nature,  whether by conduct or
otherwise in any one or more instances, of any provision hereof, shall be deemed
to be, or construed as, a further or continuing  waiver of any such provision or
of another provision hereof.

                                       16
<PAGE>

12. NOTICES

     Any notice,  instructions or other  communication  required or which may be
given hereunder  (including  without  limitation the delivery of Common Stock to
the  Representative out of the Escrow Fund) shall be in writing either delivered
personally or mailed by certified or registered mail, return receipt  requested,
or sent by facsimile  transmission,  and shall be deemed given when so delivered
personally, mailed or sent by facsimile, as follows:

        If to Omnicom or the Surviving Corporation, to:

               Omnicom Group Inc.
               437 Madison Avenue
               New York, New York 10022
               Attention: Secretary
               Fax No.: 212-415-3536


        if to the Representative, to:

               Mr. Paul H. Alvarez
               c/o Omnicom Group Inc.
               437 Madison Avenue
               New York, New York 10022
               Fax No.:  212-415-3530


        and if to the Escrow Agent, to:

               The Chase Manhattan Bank, N.A.
               4 Chase Manhattan Center, 3rd floor
               Brooklyn, New York 11245
               Attention: Escrow Department
               Fax No.: 718-242-3529


     Any party may change the persons and addresses to which notices,  payments,
instructions  or other  communications  are to be sent to such  party by  giving
written  notice of any such  change in the  manner  provided  herein  for giving


                                       17
<PAGE>

notice.  Notices sent by facsimile transmission shall be confirmed in writing by
registered or certified mail, return receipt requested.

13. ARBITRATION

     If any demand  shall be made for  arbitration  hereunder  in respect of any
Claim or other  matter in  dispute  hereunder  between  the  Representative  and
Omnicom,  such Claim or matter shall be settled by  arbitration in New York, New
York,  before one arbitrator chosen from the Commercial Panel in accordance with
the  Rules  then  pertaining  of  the  American  Arbitration  Association.   The
arbitrator  shall  consider only the items in dispute and shall be instructed to
act within thirty days to resolve all items in dispute.  The "final decision" of
the arbitrator  shall be a conclusive  determination  of the matter and shall be
binding  upon the  Representative,  the  Shareholders,  Omnicom,  the  Surviving
Corporation and the Escrow Agent,  and shall not be contested by any of them. In
making its determination the arbitrator shall be instructed to take into account
the definition of Losses, the limitations of liability applicable to Losses, and
other  provisions of Article XI of the Merger  Agreement.  The arbitrator  shall
determine the party  (Omnicom or the  Representative,  as the case may be) whose
asserted  positions before the arbitrator are in the aggregate  further from the
aggregate resolutions  determined by the arbitrator,  which non-prevailing party
shall pay the costs and expenses of the arbitrator.

14. JURY WAIVER

     All  parties to this  Agreement  waive any  rights  they may have to a jury
trial.

15. MISCELLANEOUS

     (a) This Escrow Agreement shall be governed by, and construed in accordance
with, the laws of the State of New York  applicable to agreements made and to be
performed entirely within such State.

     (b) This Escrow  Agreement  shall be binding upon, and inure to the benefit
of the  Representative  (or his  successor)  and the  successors  and assigns of

                                       18
<PAGE>

Omnicom, and the Escrow Agent, but no delegation of any obligations provided for
herein may be made by any party hereto  without the express  written  consent of
the other  parties  hereto,  except for the  provisions  of  Section  9.4 hereof
respecting successor escrow agents.

     (c) The section  headings  contained in this Escrow  Agreement are inserted
for  convenience  of  reference  only,  and  shall not  affect  the  meaning  or
interpretation of this Escrow Agreement.

                                       19
<PAGE>
                                  
     WITNESS the  execution of this Escrow  Agreement as of the date first above
written.

                                       OMNICOM GROUP INC.

                                       By:
                                          --------------------------------------

                                       KETCHUM COMMUNICATIONS
                                       HOLDINGS, INC.

                                       By:
                                           -------------------------------------
                                           Paul H. Alvarez

                                       THE CHASE MANHATTAN BANK, N.A.

                                       By:
                                          --------------------------------------




                                       20
<PAGE>


                                                  Schedule A to Escrow Agreement



                      Shares Subject to General Escrow Fund

                                [To be completed]






<PAGE>


                                                  Schedule B to Escrow Agreement



                      Shares Subject to Special Escrow Fund

                                [To be completed]






                                      -ii-


<PAGE>


                                                  Schedule C to Escrow Agreement



                       Additional Shares to be Held Until
                              the Publication Date

                                [To be completed]







                                     -iii-


<PAGE>


                                                   Exhibit 1 to Escrow Agreement


                      Terms Defined in the Merger Agreement
                               and their Meanings

     "Affiliates  Representation  Letter"  means the  letter  delivered  by each
Company Affiliate pursuant to Section 7.2 of the Merger Agreement.

     "Asserted  Liability" means any demand,  claim or circumstances which gives
rise,  or  with  lapse  of time  would  or  might  give  rise to a claim  or the
commencement  (or  threatened   commencement)  of  any  action,   proceeding  or
investigation that may result in any Losses.

     "Closing  Date"  means  ________,  1996,  or such other date  chosen by the
parties to the Merger Agreement for the closing of the transactions contemplated
by the Merger Agreement in accordance with Section 2.2 of the Merger Agreement.

     "Company  Affiliate" means those persons identified on Schedule C hereto as
"affiliates" of the Company,  as the term  "affiliate" is used in Paragraphs (c)
and (d) of Rule 145 under the Securities Act of 1933 or in SEC ASR No. 135.

     "Effective  Time"  means  the  time  when  the  Merger  shall  have  become
effective.

     "Indemnified Parties" mean Omnicom and its affiliates,  directors, officers
and employees.

     "Losses"  mean  all   liabilities   (including   liabilities   for  taxes),
obligations,  bonuses,  damages,  penalties,  claims, actions, suits, judgments,
settlements,   out-of-pocket  costs,   expenses  and  disbursements   (including
reasonable costs of investigation,  and reasonable attorneys',  accountants' and
expert  witnesses'  fees,  whether or not suit is brought) of whatever  kind and
nature, to the extent not covered by insurance which the applicable  Indemnified
Parties will be entitled to obtain the benefits.

     "Omnicom  Stock" means shares of Omnicom  common stock,  par value $.50 per
share.

     "Subsidiary"  means all of the  Company's  directly  and  indirectly  owned
subsidiaries.

                                      -iv-

<PAGE>

                                                   Exhibit 2 to Escrow Agreement

                              GENERAL CLAIMS NOTICE


[Paul H. Alvarez] [Edward Graf], as Shareholder Representative
Ketchum Communications Holdings, Inc.
Six, PPG Place
Pittsburgh, Pennsylvania 15222

The Chase Manhattan Bank, N.A.
4 Chase MetroTech Center, 3rd Floor
Brooklyn, New York 11245
Attention:  Escrow Department

Gentlemen:

     The undersigned  refers to the Escrow  Agreement by and among Omnicom Group
Inc., Ketchum Communications  Holdings, Inc., Paul H. Alvarez as Representative,
and The Chase Manhattan  Bank, N.A. dated ___ __, 1996 (the "Escrow  Agreement";
the terms defined therein being used herein as therein defined) and hereby gives
you  notice,  pursuant  to  Section  2.1 of the Escrow  Agreement  that [Name of
Indemnified  Party] has suffered General Losses in the  [approximate]  amount of
$_______.  The General  Losses are in the nature of [provide  description of the
General Losses].


                                         Very truly yours,

                                         OMNICOM GROUP INC.


                                         By
                                            ------------------------------------




                                      -v-

<PAGE>


                                                   Exhibit 3 to Escrow Agreement


                               PUBLICATION NOTICE

The Chase Manhattan Bank, N.A.
4 Chase MetroTech Center, 3rd Floor
Brooklyn, New York 11245
Attention:  Escrow Department

Gentlemen:

     The undersigned  refers to the Escrow  Agreement by and among Omnicom Group
Inc., Ketchum Communications  Holdings, Inc., Paul H. Alvarez as Representative,
and The Chase Manhattan  Bank, N.A. dated ___ __, 1996 (the "Escrow  Agreement";
the terms defined therein being used herein as therein defined) and hereby gives
you notice,  that Omnicom has released and  published  financial  results of the
combined operations of Omnicom and the Surviving  Corporation  covering a period
of at least 30 days after the Effective Time of the Merger.

     Accordingly,  the Publication Date has occurred.  You are hereby authorized
and  directed to mail or deliver to each  Shareholder  the stock  certificate(s)
identified next to his or her name on Schedule C hereto.


                                           Very truly yours,

                                           OMNICOM GROUP INC.



                                           By
                                              ----------------------------------



                                      -vi-



                                                                   March 8, 1996


Omnicom Group Inc.
437 Madison Avenue
New York, New York 10022

     Re: Registration Statement of Form S-4
         ----------------------------------

     Gentlemen: 

     In our capacity as counsel to Omnicom Group Inc., a New York corporation
(the "Company"), we have been asked to render this opinion in connection with a
Registration Statement on Form S-4 (the "Registration Statement") being filed by
the Company contemporaneously with the Securities and Exchange Commission under
the Securities Act of 1993, as amended, covering an aggregate of up to 1,500,000
shares of common stock, $.50 par value, of the Company (the "Shares") to be
issued in connection with the acquisition by the Company of Ketchum
Communications Holdings, Inc. pursuant to an Agreement and Plan of Merger dated
March 7, 1996 (the "Merger Agreement").

     In that connection, we have examined the Certificate of Incorporation and
the By-Laws, both as amended, of the Company, the Registration Statement,
corporate proceedings relating to the issuance of the Shares, and such other
instruments and documents as we deemed relevant under the circumstances.

     In making the aforesaid examinations, we have assumed the genuineness of
all signatures and the conformity to original documents of all copies furnished
to us as original or photostatic copies. We have also assumed that the corporate
records furnished to us by the Company include all corporate proceedings taken
by the Company to date.

     Based upon and subject to the foregoing, we are of the opinion that when
issued in accordance with the Merger Agreement, the Shares will have been
legally issued and will be fully paid and non-assessable shares of common stock,
$.50 par value, of the Company.

     We hereby consent to the use of our opinion as herein set forth as an
exhibit to the Registration Statement and to the use of our name under the
caption "Legal Matters" in the Prospectus/Information Statement forming part of
the Registration Statement.


                                                               Very truly yours,


                                                             /s/ Davis & Gilbert


March 7, 1996


Board of Directors
Ketchum Communications Holdings, Inc.
Six PPG Place
Pittsburgh, PA 15222

Dear Board:

This letter is in response to your request for our tax opinion on the federal
income tax consequences of the merger (the "Merger") of KCI Acquisition, Inc.
("OmniSub") into Ketchum Communications Holdings, Inc. ("Ketchum") with Ketchum
surviving and the former shareholders of Ketchum receiving shares of Omnicom
Group, Inc. ("Omnicom") pursuant to the Agreement and Plan of Merger (the
"Plan") by and among Ketchum, Omnicom, and OmniSub dated March 7, 1996.

Our opinion is based upon the representations provided and our understanding of
the facts. Specifically, we have relied upon the Ketchum and Omnicom
representations provided in the letters ("Representation Letters") dated March
6, 1996 and March 6, 1996, respectively, and the statements of fact in the
following documents: the Plan, the Escrow Agreement (attached as an exhibit to
the Plan) to be signed at closing, the Form S-4 Registration Statement to be
filed March 8, 1996 with the Securities and Exchange Commission, and a sample
agreement between Ketchum and former shareholders of Ketchum relating to the
change of control premium (collectively "Documents").


FACTS

Ketchum is a corporation organized under the laws of the Commonwealth of
Pennsylvania. As of March 7, 1996, Ketchum had 374,967 shares of Common Stock
outstanding and 6,282 shares of Voting Preferred Stock outstanding. As of
February 29, 1996, Ketchum's Common Stock is held by approximately 230 Ketchum
employees, and those shareholders owning approximately five percent or more of
the Ketchum Common Stock are the following: Edward L. Graf, J. Craig Mathiesen,
Paul H. Alvarez, James K. Larkin, Dianne Snedaker, KCHI 401(k) Profit Sharing
Plan, and David R. Drobis.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 2


As of February 29, 1996, Ketchum's 401(k) Profit-Sharing Plan was the sole
shareholder of the Preferred Stock. On February 29, 1996, 1,604 shares of
Ketchum Preferred Stock were exchanged for 29,761 shares of Ketchum Common Stock
and $10,893.67 in lieu of fractional shares in a transaction intended to qualify
as tax-free recapitalization under section 368(a)(1)(E)1.

Ketchum has historically purchased shares owned by employees upon the death or
termination of the employment of the employee. Most of these repurchases have
been accompanied by an agreement which provided for a premium to be paid upon a
change in control of Ketchum within the five year period after the repurchase of
the shares.

Ketchum has either entered into contracts or has offered to enter into contracts
with some of its former shareholders to terminate each former shareholder's
rights under the existing shareholder change of control agreement to receive a
premium in the event Ketchum is sold in exchange for a cash payment that is to
be made by Ketchum to the former shareholder. Some of the former shareholders
have accepted Ketchum's offer.

Ketchum's principal businesses are advertising, public relations and directory
advertising. These services are offered domestically through offices in San
Francisco, Los Angeles, New York, Chicago and Pittsburgh. Ketchum's
international operations include the United Kingdom, France, Germany and the
Netherlands.

Omnicom is a corporation organized under the laws of the State of New York.
Omnicom Common Stock is publicly traded and widely held. Omnicom, through its
wholly and partially-owned companies, operates advertising agencies which plan,
create, produce and place advertising in various media and offers clients such
additional services as marketing consultation, consumer market research, design
and production of merchandising and sales promotion programs and materials,
direct mail advertising, corporate identification and public relations.
Operations cover the major regions of North America, the United Kingdom,
Continental Europe, the Middle East, Latin America, the Far East and Australia.

OmniSub, a Pennsylvania corporation, was formed as a wholly owned subsidiary of
Omnicom to effectuate this transaction.

- ----------
1 Unless otherwise stated, all section references contained herein refer to the
Internal Revenue Code of 1986, as amended, and the Income Tax Regulations
thereunder.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 3


The Boards of Directors of Omnicom and Ketchum have determined that it is in the
best interests of their respective companies and stockholders that the Merger
take place. The Ketchum Board considered a number of factors, including, without
limitation, the following:

(i)   The Board's assessment that the Ketchum Advertising operations could more
      fully realize their long-term strategic objectives by affiliating with a
      substantially larger agency, such as Omnicom, thereby affording Ketchum
      access to Omnicom's international service facilities, access to new
      clients and Omnicom's financial and managerial resources.

(ii)  Ketchum's Public Relations agency could more fully realize its long-range
      strategic objectives by working within Omnicom. This will afford it access
      to Omnicom's financial resources and its clients. It will also allow them
      to have access to Omnicom's extensive international service facilities.

(iii) Ketchum Directory Advertising will benefit from the opportunity to service
      Omnicom clients.

(iv)  The current and prospective environment in which Ketchum Advertising
      operates, including national and local conditions, and the competitive
      environment for advertising generally.

Omnicom's Board of Directors believes that the Merger represents an opportunity
to strengthen the reach of its Diversified Agency Services division through the
acquisition of a full-service marketing communication services company with
lines of business including public relations, consumer advertising, directory
advertising and other related activities.


TRANSACTION

Pursuant to one overall plan, the following transactions will take place:

1.    OmniSub will merge with and into Ketchum. Ketchum will be the surviving
      corporation, and OmniSub will cease to exist as a separate corporate
      entity.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 4


2.    By virtue of the Merger:

     (a)  Each issued and outstanding share of the Common Stock of OmniSub shall
          be converted into and become one share of Common Stock of Ketchum.

     (b)  Any dissenting shareholder's Ketchum Common Stock shall not be
          converted into shares of Omnicom Common Stock, but the holder thereof
          shall be entitled to such rights as are granted by the applicable
          provisions of the Pennsylvania Business Corporation Law ("PBCL").

     (c)  All shares of Ketchum Common Stock owned as treasury stock by Ketchum
          shall be canceled and retired and shall cease to exist and no stock of
          Omnicom or other consideration shall be delivered in exchange
          therefor.

     (d)  All of the issued and outstanding shares of Ketchum Common Stock
          (other than shares to be canceled in accordance with Section (c)
          above) shall be converted into the right to receive shares of Omnicom
          Common Stock having a value in the aggregate of $44,940,000. All such
          shares of Ketchum Common Stock shall no longer be outstanding and
          shall automatically be canceled and retired and cease to exist. Each
          holder of a certificate representing any such shares shall cease to
          have any rights with respect thereto, except for the right to receive
          the shares of Omnicom Common Stock and any cash in lieu of fractional
          shares of Omnicom Common Stock to be issued or paid in consideration
          therefor and except for those rights subject to the terms of the
          Escrow Agreement referred to in Section 2.7 of the Plan.

     (e)  All shares of Ketchum Preferred Stock owned as treasury stock by
          Ketchum shall be canceled and retired and shall cease to exist and no
          stock of Omnicom or other consideration shall be delivered in exchange
          therefor.

     (f)  Each issued and outstanding share of Series A Preferred Stock of
          Ketchum shall be converted into the right to receive the number of
          shares of Omnicom Common Stock, the value of which shall equal $1,000.

<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 5


3.    No fractional shares of Omnicom Common Stock shall be issuable. Each
      Ketchum stockholder who would otherwise be entitled to a fractional share
      shall, in lieu thereof, be paid in cash in an amount equal to the value of
      such fractional share based on the market value of the Omnicom Common
      Stock.

4.    In order to fund the indemnification obligations described in Section 11.2
      of the Plan, shares of Omnicom stock issuable to Ketchum Common
      shareholders will be held in escrow as follows:

     (a)  Omnicom Common Stock having a market value of $4,400,000 to cover
          breaches of representations and warranties (the "General Escrow
          Fund").

     (b)  Omnicom Common Stock having a market value of $2,500,000 to cover any
          costs incurred by Ketchum in connection with the reorganization of
          Ketchum's media buying operations of its subsidiary Ketchum
          Communications Inc. (the "Special Escrow Fund").

          Each of the Ketchum Common shareholders will be depositing into escrow
          his pro-rata share of the General Escrow Fund and the Special Escrow
          Fund.

5.    Consummation of the Merger is contingent upon the satisfaction of certain
      conditions, including without limitation, the SEC's not having objected to
      Omnicom's treatment of the Merger as a pooling-of-interests for accounting
      purposes, Omnicom's having received a letter from each of Deloitte &
      Touche LLP and Omnicom's independent accountants, confirming that Ketchum
      and Omnicom, respectively, are poolable entities, and the aggregate number
      of dissenting shares does not exceed 3 percent of the total number of
      shares of Ketchum Common Stock outstanding as of the Merger.

The Ketchum Common Stock and the Ketchum Preferred Stock exchanged in the Merger
will herein be referred to collectively as "Ketchum Stock."


OPINION

In our opinion, based on the Representation Letters, the information and facts
contained in the Documents and the information, facts and assumptions contained
herein:
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 6


1.    The Merger of OmniSub with and into Ketchum will constitute a
      reorganization within the meaning of section 368(a)(1)(A). The
      reorganization will not be disqualified by reason of the fact that Common
      Stock of Omnicom is used in the transaction by reason of the application
      of section 368(a)(2)(E) as

     (a)  subsequent to the proposed transaction, Ketchum will hold
          substantially all its properties and substantially all the properties
          of OmniSub (other than the Omnicom Common Stock distributed as part of
          the transaction), and

     (b)  in the transaction, the Ketchum shareholders will exchange an amount
          of stock constituting control solely for voting Common Stock of
          Omnicom.

      Omnicom, OmniSub and Ketchum will each be "a party to a reorganization"
      within the meaning of section 368(b).

2.    No gain or loss will be recognized by Ketchum on the receipt of the assets
      of OmniSub in exchange for Ketchum Stock. Section 1032(a).

3.    No gain or loss will be recognized by Ketchum's shareholders upon the
      exchange of their Ketchum Stock (including fractional share interests they
      might otherwise be entitled to receive) solely for Omnicom Common Stock.
      Section 354(a)(1).

4.    The holding period of the Omnicom Common Stock (including fractional share
      interests they might otherwise be entitled to receive) will include the
      holding period of the Ketchum Stock surrendered in exchange therefor,
      provided that Ketchum Stock was held as a capital asset on the date of
      exchange. Section 1223(1).

5.    The aggregate basis of the Omnicom Common Stock (including fractional
      share interests they might otherwise be entitled to receive) received by
      the Ketchum shareholders will be the same, in each instance, as the
      aggregate basis of the Ketchum Stock surrendered in exchange therefor.
      Section 358(a).

6.    Cash received by a Ketchum shareholder otherwise entitled to receive a
      fractional share of Omnicom Common Stock in the exchange will be treated
      as if the fractional shares were distributed as part of the exchange and
      were then redeemed by Omnicom. These cash payments will be treated as
      having been received as distributions in full payment in exchange for the
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 7


      stock redeemed as provided in Section 302(a). This receipt of cash will
      result in gain or loss measured by the difference between the basis of
      such fractional share interest and the cash received. Such gain or loss
      will be capital gain or loss to the Ketchum shareholder, provided the
      Ketchum Stock was a capital asset in the hands of such shareholder.

7.    Where cash is received by a dissenting shareholder of Ketchum, such cash
      will be treated as received by the dissenting shareholder as a
      distribution in redemption of the shareholder's Ketchum stock, subject to
      the provisions and limitations of Section 302.


REPRESENTATIONS

We have relied on the following representations of fact made by Ketchum and/or
Omnicom in connection with the Merger:

a.    The fair market value of Omnicom Voting Common Stock received by each
      Ketchum shareholder will be approximately equal to the fair market value
      of the Ketchum Stock surrendered in the exchange.

b.    The following representations relate to the "Substantially All" test:

     1.   The net fair market value of Ketchum's assets, as evidenced by the
          fair market value of Omnicom stock to be issued in the transaction,
          will be approximately $51,222,000. Net fair market value means gross
          assets less liabilities. For purposes of this representation, the net
          fair market value of Ketchum's assets includes approximately
          $56,500,000 of net assets less approximately $5,278,000 to pay amounts
          owed to former shareholders under their shareholder agreements for a
          final net fair market value of approximately $51,222,000 immediately
          prior to the transaction. In the transaction, $6,900,000 of Omnicom
          stock will be placed in escrow. In the event that none of the Omnicom
          stock placed in escrow is ultimately distributed to Ketchum
          shareholders, then the net fair market value of Ketchum's assets would
          be approximately $44,322,000.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 8


     2.   The total of amounts paid by Ketchum to dissenters, amounts used by
          Ketchum to pay its reorganization expenses, and all redemptions and
          distributions (except for regular, normal dividends and payments to
          former shareholders under their shareholder agreements) made by
          Ketchum immediately preceding the transaction which are part of the
          transaction will not exceed $4,432,200 of Ketchum's assets immediately
          before the transaction.

     3.   Following the Merger, the Company will hold at least 90% of the fair
          market value of OmniSub's net assets and at least 70% of the fair
          market value of OmniSub's gross assets held immediately prior to the
          Merger. For purposes of this representation, amounts used by OmniSub
          to pay reorganization expenses, and all redemptions and distributions
          (except for regular, normal dividends) made by OmniSub will be
          included as assets of OmniSub immediately prior to the Merger.

c.    In the transaction, shares of Ketchum Stock representing control of
      Ketchum, as defined in Section 368(c), will be exchanged solely for
      Omnicom Voting Common Stock. For this purpose "control" means stock
      possessing at least 80% of the combined voting power of all voting stock
      and at least 80% of the total number of shares of each other class of
      stock.

d.    Following the transaction, Ketchum will continue its historic businesses
      or use a significant portion of its historic business assets in its
      business.

e.    On the date of the transaction, the fair market value of the assets of
      Ketchum will exceed the sum of its liabilities, plus the amount of
      liabilities, if any, to which the assets are subject.

f.    Ketchum, OmniSub and Omnicom are not investment companies within the
      meaning of Section 368(a)(2)(F)(iii) and (iv). The term investment company
      in this context means a corporation 50 percent or more of the value of
      whose total assets are stock and securities and 80 percent or more of the
      value of whose total assets are assets held for investment. In making the
      50-percent and 80-percent determinations under the preceding sentence,
      stock and securities in any subsidiary corporation shall be disregarded
      and the parent corporation shall be deemed to own its ratable share of the
      subsidiary's assets.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 9


g.    Ketchum, OmniSub, Omnicom and Ketchum's shareholders will each pay their
      own expenses, if any, which are incurred in connection with the proposed
      transaction.

h.    Ketchum is not under the jurisdiction of a court in a Title 11, or similar
      case within the meaning of Section 368(a)(3)(A) .

i.    Ketchum has no plan or intention to issue additional shares of its stock
      that would result in Omnicom's losing control of Ketchum within the
      meaning of Section 368(c) .

j.    At the time of the transaction, Ketchum will not have outstanding any
      warrants, options, convertible securities, or any other type of rights
      pursuant to which any person could acquire stock in Ketchum that, if
      exercised or converted, would affect Omnicom's acquisition of Ketchum's
      stock and the retention of control of Ketchum by Omnicom, as defined in
      Section 368(c) .

k.    Omnicom has no plan or intention to liquidate Ketchum; to merge Ketchum
      with or into another corporation; to sell or otherwise dispose of the
      stock of Ketchum except for transfers of stock to corporations controlled
      by Omnicom; or to cause Ketchum to sell or otherwise dispose of any of its
      assets or of any of the assets acquired from OmniSub, except for
      dispositions made in the ordinary course of business or transfers of
      assets to a corporation controlled by Ketchum.

l.    Omnicom has no plan or intention to reacquire any of its stock issued in
      the transaction.

m.    Prior to the transaction, Omnicom will be in control of OmniSub within the
      meaning of Section 368(c) .

n.    Omnicom does not own, nor has it owned during the past five years, any
      shares of the stock of Ketchum.

o.    None of the compensation received by any shareholder-employees of Ketchum
      will be separate consideration for, or allocable to, any of their shares
      of Ketchum Stock; none of the shares of Omnicom Common Stock received by
      any shareholder-employees of Ketchum will be separate consideration for,
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 10


      or allocable to, any employment agreement; and the compensation paid to
      any shareholder-employees will be for services actually rendered and will
      be commensurate with amounts paid to third parties bargaining at
      arm's-length for similar services.

p.    The 5% shareholders of Ketchum and, to the best of the knowledge of
      Ketchum's management, the remaining shareholders of Ketchum, have no plan
      or intention to sell or otherwise dispose of the Common Stock of Omnicom
      to be received in the transaction that would reduce the Ketchum
      shareholders' ownership of Omnicom Voting Common Stock to a number of
      shares having a value, as of the date of the transaction, of less than 50%
      of the value of the formerly outstanding stock of Ketchum as of the same
      date. For purposes of this representation, shares of Ketchum Stock
      exchanged for cash in lieu of fractional shares of Omnicom will be treated
      as outstanding Ketchum Stock on the date of the transaction. Moreover,
      shares of Ketchum Stock and shares of Omnicom Common Stock held by Ketchum
      shareholders and otherwise sold, redeemed or disposed of prior or
      subsequent to the transaction will be considered in making this
      representation.

q.    The payment of cash in lieu of fractional shares of Omnicom Common Stock
      is solely for the purpose of avoiding the expense and inconvenience to
      Omnicom of issuing fractional shares and does not represent separately
      bargained-for consideration. The total cash consideration that will be
      paid in the transaction to the Ketchum shareholders instead of issuing
      fractional shares of Omnicom Common Stock will not exceed one percent of
      the total consideration that will be issued in the transaction to the
      Ketchum shareholders in exchange for their shares of Ketchum stock. The
      fractional share interests of each Ketchum shareholder will be aggregated,
      and no Ketchum shareholder will receive cash in an amount equal to or
      greater than the value of one full share of Omnicom Common Stock.

r.    The merger of OmniSub with and into Ketchum will qualify as a statutory
      merger under the laws of the Commonwealth of Pennsylvania.

s.    The following representations pertain to the terms and conditions
      associated with the Escrow Agreement:

     1.   There is a valid business reason for establishing the escrow.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 11


     2.   The stock subject to the Escrow Agreement will appear as issued and
          outstanding on the balance sheet of Omnicom and such stock is legally
          outstanding under applicable state law.

     3.   All dividends paid on such stock will be distributed currently to the
          Ketchum shareholders.

     4.   All voting rights of such stock are exercisable by or on behalf of the
          Ketchum shareholders or their authorized agent.

     5.   No shares of such stock are subject to restrictions requiring their
          return to Omnicom because of death, failure to continue employment, or
          similar restrictions.

     6.   All such stock will be released from the arrangement within 5 years
          from the date of consummation of the transaction (except where there
          is a bona fide dispute as to whom the stock should be released).

     7.   At least 50 percent of the number of shares of the Omnicom Common
          Stock issued initially to the Ketchum shareholders in the transaction
          is not subject to the Escrow Agreement.

     8.   The return of Omnicom Common Stock will not be triggered by an event
          the occurrence or nonoccurrence of which is within the control of the
          Ketchum shareholders.

     9.   The return of stock will not be triggered by the payment of additional
          tax or reduction in tax paid as a result of a Internal Revenue Service
          audit of the Ketchum shareholders or Ketchum either (a) with respect
          to the reorganization transaction in which the escrowed stock will be
          issued, or (b) when the reorganization transaction in which the
          escrowed stock will be issued involves persons related within the
          meaning of section 267(c)(4).

     10.  The mechanism for the calculation of the number of shares of stock to
          be returned is objective and readily ascertainable.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 12


t.    The prior redemptions of Ketchum stock over the past five years were done
      pursuant to the terms of the shareholder agreements which require the
      return of Ketchum stock for redemption in the year in which the
      shareholders terminate their employment, and include a provision allowing
      the redeemed shareholder to receive additional amounts if Ketchum has a
      change in ownership within five years of the redemption date.


LAW AND ANALYSIS

Section 368(a)(1)(A) provides that the term "reorganization" means a statutory
merger or consolidation. Section 368(a)(2)(E) provides that a transaction
otherwise qualifying under section 368(a)(1)(A) shall not be disqualified by
reason of the fact that stock of a corporation (the "controlling corporation"),
which before the merger was in control (as defined in section 368(c)) of the
merged corporation, is used in the transaction if (i) after the transaction, the
corporation surviving the merger holds substantially all of its properties and
of the properties of the merged corporation (other than stock of the controlling
corporation distributed in the transaction); and (ii) in the transaction, former
shareholders of the surviving corporation exchanged, for an amount of voting
stock of the controlling corporation, an amount of stock in the surviving
corporation which constitutes control of such corporation.

Regulation ss. 1.368-2(b)(1) provides that, in order to qualify as a
reorganization under section 368(a)(1)(A), the transaction must be a merger or
consolidation effected pursuant to the corporation laws of the United States or
a State or Territory or the District of Columbia.

It has been represented that the merger of OmniSub with and into Ketchum will
qualify as a merger under the laws of the Commonwealth of Pennsylvania. At the
time of this transaction, Omnicom will own 100% of the issued and outstanding
stock of OmniSub and, thus, will be in control of OmniSub within the meaning of
section 368(c).

Revenue Ruling 57-518, 1957-2 C.B. 253, provides that the test for substantially
all "will depend upon the facts and circumstances in each case rather than upon
any particular percentage. Among the elements of importance that are to be
considered in arriving at the conclusion are the nature of the properties
retained by the transferor, the purpose of the retention, and the amount
thereof." For ruling purposes the Internal Revenue Service ("IRS") has indicated
that the "substantially all" requirement of section 368(a)(2)(E)(i) of the Code
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 13


is satisfied if there is a transfer (and in the case of a surviving corporation
under section 368(a)(2)(E)(i), the retention) of assets representing at least 90
percent of the fair market value of the net assets and at least 70 percent of
the fair market value of the gross assets held by the corporation immediately
prior to the transfer. For purposes of satisfying the advancing ruling
requirement of the IRS the amounts paid by Ketchum to dissenters, amounts used
by Ketchum to pay its reorganization expenses, and all redemptions and
distributions (except for regular, normal dividends) made by Ketchum immediately
preceding the transaction which are part of the transaction will be considered
as assets held by Ketchum immediately prior to the transaction. Additionally,
Reg. Section 1.368-2(j)(3)(iii) provides that "[i]n applying the `substantially
all' test to the merged corporation, assets transferred from the controlling
corporation to the merged corporation in pursuance of the plan of reorganization
are not taken into account." Therefore, any amounts transferred from Omnicom to
OmniSub are not taken into account for purposes of the substantially all test.

Ketchum has represented the following:

     1.   The net fair market value of Ketchum's assets, as evidenced by the
          fair market value of Omnicom stock to be issued in the transaction,
          will be approximately $51,222,000. Net fair market value means gross
          assets less liabilities. For purposes of this representation, the net
          fair market value of Ketchum's assets includes approximately
          $56,500,000 of net assets less approximately $5,278,000 to pay amounts
          owed to former shareholders under their shareholder agreements for a
          final net fair market value of approximately $51,222,000 immediately
          prior to the transaction. In the transaction, $6,900,000 of Omnicom
          stock will be placed in escrow. In the event that none of the Omnicom
          stock placed in escrow is ultimately distributed to Ketchum
          shareholders, then the net fair market value of Ketchum's assets would
          be approximately $44,322,000.

     2.   The total of amounts paid by Ketchum to dissenters, amounts used by
          Ketchum to pay its reorganization expenses, and all redemptions and
          distributions (except for regular, normal dividends and payments to
          former shareholders under their shareholder agreements) made by
          Ketchum immediately preceding the transaction which are part of the
          transaction will not exceed $4,432,200 of Ketchum's assets immediately
          before the transaction.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 14


Accordingly, under the representations given by Ketchum, at least 90 percent of
the fair market value of the net assets and at least 70 percent of the fair
market value of the gross assets held by Ketchum immediately prior to the
transaction will be retained in the Merger. Omnicom has represented that
"[f]ollowing the Merger, Ketchum will hold at least 90% of the fair market value
of OmniSub's net assets and at least 70 percent of the fair market value of
OmniSub's gross assets held immediately prior to the Merger. For purposes of
this representation, amounts used by OmniSub to pay reorganization expenses, and
all redemptions and distributions (except for regular, normal dividends) made by
OmniSub will be included as assets of OmniSub immediately prior to the Merger."
Thus, the "substantially all" requirement of section 368(a)(2)(E)(i) will be
met.

Additionally, Omnicom will not own any Ketchum Stock prior to this transaction.
Thus, in the reverse triangular merger, Omnicom will acquire 100% of the stock
of Ketchum solely for voting stock of Omnicom. Accordingly, the requirement in
section 368(a)(2)(E)(ii) will be met.

In addition to the requirements set forth in the statute certain requirements
set forth in the regulations under section 368 must also be met in order for a
transaction to be a tax-free reorganization. Regulation ss. 1.368-1(b) excepts
from the general rule of taxability certain specifically described exchanges
incident to such readjustments of corporate structures made in one of the
particular ways specified in the Code as are required by business exigencies and
which affect only a readjustment of a continuing interest in property under
modified corporate form. Requisite to a reorganization are a continuity of
business enterprise and a continuity of interest therein on the part of those
persons who, directly or indirectly, were the owners of the enterprise prior to
the reorganization.

Under Reg. ss. 1.368-1(b), the continuity of interest doctrine requires that in
a reorganization there must be a continuity of interest therein on the part of
those persons who, directly or indirectly, were the owners of the enterprise
prior to the reorganization. Rev. Proc. 77-37, 1977-2 C.B. 568, provides that
the "continuity of interest" requirement of Reg. ss. 1.368-1(b) is satisfied if
there is continuing interest through stock ownership in the acquiring or
transferee corporation (or a corporation in "control" thereof within the meaning
of section 368(c) ) on the part of the former shareholders of the acquired or
transferor corporation which is equal in value, as of the effective date of the
reorganization, to at least 50% of the value of all of the formerly outstanding
stock of the acquired or transferor corporation as of the same date. Sales,
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 15


redemptions, and other dispositions which are part of the plan of reorganization
will be considered in determining whether there is a 50% continuing interest
through stock ownership as of the effective date of the reorganization.

Ketchum's shareholders will receive Common Stock in Omnicom, the corporation in
control of the acquiring or transferee corporation, which is equal in value to
approximately 100% of all the formerly outstanding Ketchum Stock. Ketchum has
represented the following:

     The 5% shareholders of Ketchum and, to the best of the knowledge of
     Ketchum's management, the remaining shareholders of Ketchum, have no plan
     or intention to sell or otherwise dispose of the Common Stock of Omnicom to
     be received in the transaction that would reduce the Ketchum shareholders'
     ownership of Omnicom Voting Common Stock to a number of shares having a
     value, as of the date of the transaction, of less than 50% of the value of
     the formerly outstanding stock of Ketchum as of the same date. For purposes
     of this representation, shares of Ketchum Stock exchanged for cash in lieu
     of fractional shares of Omnicom will be treated as outstanding Ketchum
     Stock on the date of the transaction. Moreover, shares of Ketchum Stock and
     shares of Omnicom Stock held by Ketchum shareholders and otherwise sold,
     redeemed or disposed of prior or subsequent to the transaction will be
     considered in making this representation.

Accordingly, the continuity of interest requirement will be met.

Regulation ss. 1.368-1(d) provides that continuity of business enterprise
requires that the acquiring corporation either (i) continue the acquired
corporation's historic business or (ii) use a significant portion of the
acquired corporation's historic assets in a business. It has been represented
that, following the transaction, Ketchum will continue its historic businesses
or use of a significant portion of its historic business assets in its
businesses; thus, the continuity of business enterprise requirement will be met.

In order to qualify as a reorganization described in section 368, there must be
a genuine business purpose for this transaction. The Boards of Directors of
Omnicom and Ketchum have determined that it is in the best interests of the
corporations and their respective stockholders that the Merger take place.
Specifically, the Boards believe that the Merger will result in business
synergies which are necessary in order to remain competitive in the media
industry. Furthermore, the Merger will enable both parties to offer their
specific services to a broader base of contacts. Therefore, this requirement
will be met.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 16


In Rev. Proc. 84-42, the Internal Revenue Service provides guidelines with
respect to escrow arrangements in the context of certain reorganization
transactions, including 368(a)(1)(A). The Revenue Procedure provides that a
portion of the stock issued in the reorganization may be placed in escrow by the
exchanging shareholders for possible return to the issuing corporation under
specified conditions, provided that the terms of the escrow are consistent with
certain requirements. These requirements are as follows:

     1.   There must be a valid business reason for establishing the
          arrangement.

     2.   The stock subject to such arrangement must appear as issued and
          outstanding on the balance sheet of the issuing corporation and such
          stock must be legally outstanding under applicable state law.

     3.   All dividends paid on such stock must be distributed currently to the
          exchanging shareholders.

     4.   All voting rights of such stock (if any) must be exercisable by, or on
          behalf of, the shareholders or their authorized agent.

     5.   No shares of such stock may be subject to restrictions requiring their
          return to the issuing corporation because of death, failure to
          continue employment, or similar restrictions.

     6.   All such stock must be released from the arrangement within five years
          from the date of consummation of the transaction (except where there
          is a bona fide dispute as to whom the stock should be released).

     7.   At least 50 percent of the number of shares of each class of stock
          issued initially to the shareholders cannot be subject to the
          arrangement.

     8.   The return of stock cannot be triggered by an event, the occurrence or
          nonoccurrence of which is within the control of shareholders.

     9.   The return of stock cannot be triggered by the payment of additional
          tax or reduction in tax paid as a result of an Internal Revenue
          Service audit of the shareholders or the corporation either (a) with
          respect to the reorganization transaction in which the escrowed stock
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 17


          will be issued, or (b) when the reorganization transaction in which
          the escrowed stock will be issued involves persons related within the
          meaning of section 267(c)(4).

     10.  The mechanism for the calculation of the number of shares of stock to
          be returned must be objective and readily ascertainable.

Based on the factual information provided in the Plan, the Escrow Agreement and
the representations above, the requirements of Revenue Procedure 84-42 will be
satisfied.

Based on the above law and analysis, the merger of OmniSub with and into Ketchum
and the exchange of Ketchum Stock by the Ketchum Shareholders for Omnicom Common
Stock will qualify as a reorganization described in sections 368(a)(1)(A) and
368(a)(2)(E).

Section 1032(a) provides that no gain or loss shall be recognized to a
corporation on the receipt of money or other property in exchange for stock of
such corporation. OmniSub will merge with and into Ketchum in exchange for
Ketchum Stock. Accordingly, Ketchum will not recognize any gain or loss on the
exchange of its Common Stock for the property of OmniSub.

Section 361(a) provides that no gain or loss shall be recognized to a
corporation if such corporation is a party to a reorganization and exchanges
property in pursuance of the plan of reorganization, solely for stock or
securities in another corporation that is a party to the reorganization.

Section 368(b)(2) provides that the term "a party to a reorganization" includes
both corporations in the case of a reorganization resulting from the acquisition
by one corporation of stock or properties of another. In the case of a
reorganization qualifying under section 368(a)(1)(A) by reason of section
368(a)(2)(E), the term "a party to a reorganization" also includes the
controlling corporation referred to in section 368(a)(2)(E). Accordingly,
Ketchum, OmniSub, and Omnicom will each be a party to a reorganization.

Section 354(a)(1) provides that no gain or loss shall be recognized to a
shareholder if stock or securities in a corporation a party to a reorganization
are, in pursuance of the plan of reorganization, exchanged solely for stock or
securities in such corporation or in another corporation a party to the
reorganization. Because Ketchum and Omnicom will each be parties to a
reorganization, no gain or loss will be recognized by the Ketchum shareholders
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 18


upon the exchange of their Ketchum Stock solely for Omnicom Common Stock
(including fractional share interests they might otherwise be entitled to
receive).

Section 358(a)(1) provides that, in the case of an exchange to which section 354
applies, the basis of the property to be received without the recognition of
gain or loss shall be the same as that of the property exchanged, decreased by
(i) the fair market value of any other property (except money) received by the
taxpayer, (ii) the amount of money received by the taxpayer, and (iii) the
amount of loss to the taxpayer which was recognized on such exchange, and
increased by (i) the amount which was treated as a dividend, and (ii) the amount
of gain to the taxpayer which was recognized in such exchange (not including any
portion of such gain which was treated as a dividend). In the reorganization,
Ketchum's shareholders will receive only Omnicom Common Stock. Accordingly, the
basis of the Omnicom Common Stock (including fractional share interests that
they might otherwise be entitled to receive) in the hands of the Ketchum
shareholders will be the same, in each instance, as the basis of the Ketchum
Stock surrendered in exchange therefor.

Revenue Ruling 66-365, 1966-1 C.B. 116, provides that cash received by a
shareholder as part of a plan of reorganization under section 368(a)(1)(A),
which is attributable to fractional shares of stock of the acquiring
corporation, will be treated as if the fractional shares were distributed as
part of the exchange and then were redeemed by the acquirer. Under section
302(a), such cash payments will be treated as having been received as
distributions in full payment in exchange for the stock redeemed provided the
redemption is not essentially equivalent to a dividend.

Revenue Procedure 77-41, 1977-2 C.B. 574, provides that the IRS will issue an
advance ruling under section 302(a) that cash to be distributed to shareholders
in lieu of fractional share interest arising in corporate reorganizations will
be treated as having been received in part or in full payment in exchange for
the stock redeemed if the cash distribution is undertaken solely for the purpose
of saving the corporation the expense and inconvenience of issuing and
transferring fractional shares, and is not separately bargained-for
consideration. The purpose of the transaction giving rise to the fractional
share interest, the maximum amount of cash that may be received by any one
shareholder, and the percentage of the total consideration that will be cash are
among the factors that will be considered in determining whether a ruling is to
be issued.

It has been represented that the payment of cash in lieu of fractional shares of
Omnicom Common Stock is solely for the purpose of avoiding the expense and
inconvenience to Omnicom of issuing fractional shares and does not represent
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 19


separately bargained-for consideration. The total cash consideration that will
be paid in the transaction to the Ketchum shareholders instead of issuing
fractional shares of Omnicom Common Stock will not exceed one percent of the
total consideration that will be issued in the transaction to the Ketchum
shareholders in exchange for their shares of Ketchum Stock. The fractional share
interest of each Ketchum shareholder will be aggregated, and no Ketchum
shareholder will receive cash in an amount equal to or greater than the value of
one full share of Omnicom Common Stock.

Accordingly, cash received by a shareholder of Ketchum otherwise entitled to
receive a fractional share of Omnicom Common Stock in the exchange for Ketchum
Stock will be treated as if the fractional shares were distributed as part of
the exchange and then were redeemed by Omnicom. These cash payments will be
treated as having been received as distributions in full payment in exchange for
the stock redeemed as provided in section 302(a). The receipt of cash will
result in gain or loss measured by the difference between the shareholder's
basis of such fractional share interest exchanged and the cash received. Such
gain or loss will be capital gain or loss to a Ketchum shareholder, provided the
Ketchum shareholder's stock was a capital asset in the shareholder's hands and,
as such, would be subject to the provisions and limitations of Subchapter P of
Chapter 1 of the Code.

Section 1223(1) provides that, in determining the period for which the taxpayer
has held property received in an exchange, there shall be included the period
for which the taxpayer held the property exchanged if the property has, for the
purpose of determining gain or loss from a sale or exchange, the same basis (in
whole or in part) in its hands as the property exchanged. In the case of such
exchanges after March 1, 1954, the property exchanged at the time of such
exchange must be a capital asset as defined in section 1221 or property
described in section 1231. Because the basis of the Omnicom Common Stock
(including fractional share interests that they might otherwise be entitled to
receive) held by Ketchum's shareholders will have the same basis as the Ketchum
Stock exchanged, the holding period of the Omnicom Common Stock will include the
period for which the Ketchum Stock was held, provided that such stock was a
capital asset on the date of the exchange.

Section 302(b)(3) provides that if a redemption is in complete redemption of all
of the stock of a corporation owned by a shareholder, such redemption shall be
treated as a distribution in part or in full payment in exchange for such stock.
In the proposed transaction, former shareholders of Ketchum who dissent to the
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 20


Merger will receive only that which is provided under PBCL. Accordingly, to the
extent cash is received by a dissenting Ketchum shareholder, such cash will be
treated as received by the Ketchum shareholder as a distribution in redemption
of the shareholder's stock subject to the provisions and limitations of Section
302.

GENERAL

Our opinion is based upon our assumption (without independent investigation or
review) that all of the representations and all of the original, copies, and
signatures of documents are accurate, true and authentic and our assumption that
there will be timely execution and delivery of, and performance as required by
the representations and documents.

Our opinion is based the upon the law, regulations, cases, rulings and other tax
authorities in effect as of the date of this letter. If there are any
significant changes of the foregoing tax authorities (for which we shall have no
responsibility to advise you), it may result in our opinion being rendered
invalid or necessitate, upon your request, a reconsideration of the opinion.

Our opinion is limited to the specific federal income tax consequences of the
Merger as opined in paragraphs 1 through 7 above. We have not considered the
consequences to the parties involved of any tax besides the federal income tax.

We note that the federal income tax consequences to the parties involved
relating to the transactions described herein are complex and subject to varying
interpretations. While this opinion letter represents our considered judgment as
to the proper tax treatment to the parties concerned, it is not binding on the
IRS or the courts and should not be considered a guarantee that the IRS or the
courts will concur with our opinion.

This opinion letter is solely for the benefit of Ketchum and its shareholders
and inclusion in the Form S-4 Registration Statement relating to the transaction
described herein to be filed with the Securities and Exchange Commission. Other
than the uses indicated in the preceding sentence, this opinion may not be
relied upon, distributed, or disclosed by anyone without the prior written
consent of Deloitte & Touche LLP.
<PAGE>

Board of Directors
Ketchum Communications Holdings, Inc.
March 7, 1996
Page 21


Deloitte & Touche LLP



                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public accountants, we hereby consent to the incorporation
by reference in this Registration Statement of our report, dated February 20,
1995 included in the Omnicom Group Inc. Form 10-K for the year ended December
31, 1994 and to all references to our Firm included in this Registration
Statement.



                                                        /s/ ARTHUR ANDERSEN LLP


New York, New York
March 8, 1996

                                                                    EXHIBIT 23.2

                         INDEPENDENT AUDITORS' CONSENT

     We consent to the use in this Registration Statement of Omnicom Group Inc.
on Form S-4 of our report dated March 6, 1996 (which expresses an unqualified
opinion and includes an explanatory paragraph relating to substantial doubt
about the Company's ability to continue as a going concern), on the consolidated
financial statements of Ketchum Communications Holdings, Inc. and subsidiaries
(the "Company") as of December 31, 1995 and 1994 and for each of the three years
in the period ended December 31, 1995 and to the reference to us under the
heading "Experts" in the Prospectus, which is part of this Registration
Statement.



Deloitte & Touche LLP.
Pittsburgh, Pennsylvania


March 6, 1996


                                                                    EXHIBIT 23.4




March 7, 1996


We  hereby  consent  to the  incorporation  by  reference  in this  Registration
Statement  of  Omnicom  Group  Inc.  of our tax  opinion to the Board of Ketchum
Communications  Holdings, Inc. dated March 7, 1996, to the filing of our opinion
as an  exhibit  to the  Registration  Statement,  to the  summarization  of this
opinion in the "Federal  Income Tax  Consequences"  section of the  Registration
Statement  and to all  references  to our  Firm  included  in this  Registration
Statement.




Deloitte & Touche LLP
DELOITTE & TOUCHE LLP



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