CERTIFICATE OF INCORPORATION
                                       OF
                               OMNICOM GROUP INC.
                  (As restated for filing purposes pursuant to
                      Item 601(b)(3)(i) of Regulation S-K)

     FIRST: The name of the corporation is Omnicom Group Inc.

     SECOND:  The purposes for which the  corporation  is formed is to engage in
any lawful act or activity for which corporations may be organized under the New
York Business  Corporation Law, provided that the corporation will not engage in
any act or activity  requiring  the  consent or approval of any state  official,
department,  board,  agency or other body without such consent or approval first
being obtained.

     THIRD:  The  office of the  corporation  in the State of New York  shall be
located in the County of New York.

     FOURTH: The total number of shares of stock which the corporation will have
authority  to issue is  157,500,000  shares.  Of these,  150,000,000  shares are
classified as Common Stock,  par value $.50 per share,  and 7,500,000 shares are
classified as Preferred Stock, par value $1.00 per share.

     The Board of  Directors is  authorized  to divide the  7,500,000  shares of
Preferred  Stock from time to time into one or more series,  and to determine or
change by resolution  for each series its  designation,  the number of shares of
the series and the  powers,  preferences  and  rights,  and the  qualifications,
limitations  or  restrictions  of the shares of the series.  The  resolution  or
resolutions  of the Board of Directors  providing  for the division of Preferred
Stock into series within a class may include the following provisions:

     (1) The  distinctive  designation  of each series and the maximum number of
shares of each series which may be issued, which number may be increased (except
where  otherwise  provided by the Board of  Directors in creating the series) or
decreased  (but not below the number of shares of the series  then  outstanding)
from time to time by action of the Board of Directors;

     (2) Whether  the holders of shares of each series are  entitled to vote and
if so the  matters on which they are  entitled  to vote,  the number of votes to
which the holder of each share is entitled, and whether the shares of the series
are to be voted separately or together with shares of other series;

     (3) The  dividends  to which  holders  of  shares  of each  series  will be
entitled; any restrictions,  conditions or limitations upon the payment of those





dividends; whether the dividends will be cumulative and, if cumulative, the date
or dates from which the dividends will be cumulative;

     (4) Whether the shares of one or more series will be subject to redemption,
and if so, whether redemption will be mandatory or optional, and if optional, at
whose option,  the manner of selecting  shares for  redemption,  the  redemption
price and the manner of redemption;

     (5) The amount  payable on shares of each series if there is a liquidation,
dissolution or winding up of the corporation, which amount may vary at different
dates and depending upon whether the  liquidation,  dissolution or winding up is
voluntary or involuntary;

     (6) The  obligation,  if any,  of the  Corporation  to maintain a purchase,
retirement or sinking fund for shares of each series;

     (7) Whether the shares of one or more series will be  convertible  into, or
exchangeable  for,  any other types of  securities,  either at the option of the
holder  or of the  corporation,  and if so,  the  terms  of the  conversions  or
exchanges;

     (8) Any other provisions regarding the powers,  preferences and rights, and
the  qualifications,  limitations or restrictions,  of each series which are not
inconsistent with applicable law.

     All shares of a series of Preferred Stock will be identical with each other
in all respects,  except that shares of any one series issued at different times
may  differ  as to the dates  from  which  dividends  on those  shares  shall be
cumulative.

     FIFTH: No holder of any of the shares of any class of the corporation shall
be entitled as of right to subscribe  for,  purchase,  or otherwise  acquire any
shares of any class of the corporation  which the corporation  proposes to issue
or any  rights  or  options  which  the  corporation  proposes  to grant for the
purchase of shares of any class of the  corporation  or for the  purchase of any
shares,  bonds,  securities,   or  obligations  of  the  corporation  which  are
convertible  into or exchangeable  for, or which carry any rights,  to subscribe
for, purchase, or otherwise acquire shares of any class of the corporation;  and
any and all of such shares, bonds, securities or obligations of the corporation,
whether  now or  hereafter  authorized  or  created,  may be  issued,  or may be
reissued  or  transferred  if the same have been  reacquired  and have  treasury
status,  and any and all of such  rights and options may be granted by the Board
of Directors to such persons, firms, corporations and associations, and for such
lawful  consideration,  and on such  terms,  as the  Board of  Directors  in its
discretion may determine,  without first offering the same, or any part thereof,
to any said holder.  Without  limiting the  generality of the  foregoing  stated
denial of any and all preemptive rights, no holder of shares of any class of the


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corporation  shall  have  any  preemptive  rights  in  respect  of the  matters,
proceedings,  or transactions  specified in subparagraphs (1) to (6), inclusive,
of paragraph (e) of Section 622 of the Business Corporation Law.

     SIXTH: The duration of the corporation shall be perpetual.

     SEVENTH:  The  Secretary  of  State  is  designated  as  the  agent  of the
corporation  upon whom process against the  corporation  may be served,  and the
address to which the Secretary of State shall mail a copy of any process against
the corporation served upon him is: 909 Third Avenue, New York, N.Y. 10022.

     EIGHTH: The number of directors shall be fixed by the By-Laws, or by action
of the  shareholders  or the Board of Directors  under specific  provisions of a
By-Law  adopted  by  the  shareholders  entitled  to  vote  in an  election  for
directors.  If the shareholders are empowered by the By-Laws or by law to change
the  number  of  directors  constituting  the  entire  Board of  Directors,  the
affirmative  vote of holders of  two-thirds  in voting power of the  outstanding
shares of stock of the  corporation  shall be required for the  shareholders  to
change the number of directors  constituting the entire Board of Directors.  The
directors  will be divided into three  classes,  all of which classes will be as
nearly equal in number as possible, and none of which classes will include fewer
than  three  directors.  The terms of office  of the  first  class of  directors
initially  classified  will expire at the 1987 annual  meeting of  shareholders,
that of the second  class  initially  classified  will expire at the 1988 annual
meeting of shareholders  and that of the third class  initially  classified will
expire at the 1989 annual  meeting of  shareholders.  At each annual  meeting of
shareholders after the initial classification,  directors to replace those whose
terms expire at an annual meeting will be elected to hold office until the third
succeeding annual meeting of shareholders. If after the directors are classified
the number of directors is changed (1) any newly  created  directorships  or any
decrease in  directorships  will be so apportioned  among the classes as to make
all the classes as nearly equal in number as  possible,  and (2) when the number
of  directors  is  increased  by the Board of  Directors  and any newly  created
directorships  are  filled by the  Board,  there  will be no  classification  of
additional  directors  until the next  annual  meeting of  shareholders.  If the
shareholders  are  empowered by the By-Laws or by law to remove a director  (for
cause or  otherwise),  the exercise of that power will  require the  affirmative
vote of holders of two-thirds in voting power of the outstanding shares of stock
of the corporation.

     NINTH: A director of the corporation  shall not be personally liable to the
corporation  or its  shareholders  for damages for breach of fiduciary duty as a
director,  except  where a judgment  or other  final  adjudication  adverse to a
director establishes that such director's acts or omissions were in bad faith or
involved  intentional  misconduct  or  knowing  violation  of law or where  such
director  personally  gained in fact a financial  profit or other  advantage  to
which such  director  was not  legally  entitled or where such  director's  acts
violated  Section 719 of The New York  Business  Corporation  Law. Any repeal or


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modification  of this  Article  Ninth  shall not  adversely  affect any right or
protection of a director of the corporation  under this Article Ninth in respect
of any acts or omissions of such director which occurred prior to such repeal or
modification.

     TENTH: The affirmative vote of holders of two-thirds in voting power of the
outstanding  shares of stock of the corporation shall be required to approve (a)
the adoption,  amendment or repeal of any  provision of the By-Laws,  or (b) the
amendment or repeal of Article  Eighth or Article Ninth of this  Certificate  of
Incorporation.

     ELEVENTH:  Except  as  may  otherwise  be  specifically  provided  in  this
Certificate of Incorporation,  no provision of this Certificate of Incorporation
is intended by the corporation to be construed as limiting, prohibiting, denying
or abrogating any of the general or specific  powers or rights  conferred  under
the  Business  Corporation  Law upon  the  corporation,  upon its  shareholders,
bondholders,  and security holders, and upon its directors,  officers, and other
corporate  personnel,  including in particular,  the power of the corporation to
furnish  indemnification to directors and officers in the capacities defined and
prescribed by the Business  Corporation Law and defined and prescribed rights of
said  persons  to  indemnification  as the same are  conferred  by the  Business
Corporation Law.



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