SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   ----------

                                    FORM 10-Q

                                   ----------

(Mark One)

      [X]   QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES
            EXCHANGE ACT OF 1934

            For the Quarterly Period Ended: March 31, 2005

                                       OR

      [_]   TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (d) OF THE SECURITIES
            EXCHANGE ACT OF 1934

            For the transition period from _____________ to ____________

            Commission File Number: 1-10551

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

         New York                                               13-1514814
 ------------------------------                           ----------------------
(State or other jurisdiction of                               (IRS Employer
 incorporation or organization)                           Identification Number)

 437 Madison Avenue, New York, New York                            10022
- ----------------------------------------                         ----------
(Address of principal executive offices)                         (Zip Code)

                                 (212) 415-3600
              ----------------------------------------------------
              (Registrant's telephone number, including area code)

                                 Not Applicable
              ----------------------------------------------------
              (Former name, former address and former fiscal year,
                         if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports and (2) has been subject to such filing
requirements for the past 90 days. YES X   NO
                                      ---    ---

Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12 b-2 of the Exchange Act). YES X    NO
                                                ---     ---


Indicate the number of shares outstanding of each of the issuer's classes of
common stock, as of the latest practicable date. 183,375,900 (as of April 29,
2005)



                       OMNICOM GROUP INC. AND SUBSIDIARIES
                                      INDEX

PART I.               FINANCIAL INFORMATION



                                                                                                     Page No.
                                                                                                     --------
                                                                                               
     Item 1.          Financial Statements

                      Consolidated Condensed Balance Sheets  -
                           March 31, 2005 and December 31, 2004....................................      1

                      Consolidated Condensed Statements of Income  - Three Months
                           Ended March 31, 2005 and 2004...........................................      2

                      Consolidated Condensed Statements of Cash Flows  -
                           Three Months Ended March 31, 2005 and 2004..............................      3

                      Notes to Consolidated Condensed Financial Statements.........................      4

     Item 2.          Management's Discussion and Analysis of Financial Condition
                      And Results of Operations....................................................      8

     Item 3.          Quantitative and Qualitative Disclosures About Market Risk...................     19

     Item 4.          Controls and Procedures......................................................     20

PART II.              OTHER INFORMATION

     Item 1.          Legal Proceedings............................................................     21

     Item 2.          Unregistered Sales of Equity Securities and Use of Proceeds..................     21

     Item 6.          Exhibits.....................................................................     21

     Signatures   .................................................................................     23

     Certifications





                       OMNICOM GROUP INC. AND SUBSIDIARIES
                      CONSOLIDATED CONDENSED BALANCE SHEETS
                              (Dollars in Millions)



                                                                           (Unaudited)
                                                                            March 31,      December 31,
                                                                              2005             2004
                                                                              ----             ----
                                                                                      
                                     ASSETS
CURRENT ASSETS:
     Cash and cash equivalents .........................................   $   588.1        $ 1,165.6
     Short-term investments at market, which approximates cost .........        17.3            574.0
     Accounts receivable, less allowance for doubtful accounts
        of $60.8 and $67.8 .............................................     5,007.2          4,916.7
     Billable production orders in process, at cost ....................       618.7            536.6
     Prepaid expenses and other current assets .........................       986.3            902.2
                                                                           ---------        ---------
                  Total Current Assets .................................     7,217.6          8,095.1
                                                                           ---------        ---------
FURNITURE, EQUIPMENT AND LEASEHOLD IMPROVEMENTS, at cost,
     less accumulated depreciation and amortization of $890.6 and $909.8       617.1            636.4
INVESTMENTS IN AFFILIATES ..............................................       163.5            162.9
GOODWILL ...............................................................     6,381.4          6,411.4
INTANGIBLES, net of accumulated amortization of $168.2 and $164.7 ......       102.0            110.0
DEFERRED TAX BENEFITS ..................................................       300.8            303.4
OTHER ASSETS ...........................................................       267.1            283.2
                                                                           ---------        ---------
                  TOTAL ASSETS .........................................   $15,049.5        $16,002.4
                                                                           =========        =========
                      LIABILITIES AND SHAREHOLDERS' EQUITY
CURRENT LIABILITIES:
     Accounts payable ..................................................   $ 5,375.8        $ 6,011.5
     Advance billings ..................................................       905.3            874.0
     Current portion of long-term debt .................................       199.6            209.2
     Bank loans ........................................................        11.9             17.5
     Accrued taxes .....................................................       190.5            217.0
     Other liabilities .................................................     1,360.7          1,414.7
                                                                           ---------        ---------
                  Total Current Liabilities ............................     8,043.8          8,743.9
                                                                           ---------        ---------
LONG-TERM DEBT .........................................................        18.8             19.1
CONVERTIBLE NOTES ......................................................     2,339.3          2,339.3
DEFERRED COMPENSATION AND OTHER LIABILITIES ............................       281.6            309.1
LONG TERM DEFERRED TAX LIABILITY .......................................       323.0            317.4
MINORITY INTERESTS .....................................................       190.5            194.9

SHAREHOLDERS' EQUITY:
     Common stock ......................................................        29.8             29.8
     Additional paid-in capital ........................................     1,815.8          1,824.5
     Retained earnings .................................................     3,084.9          2,975.4
     Unamortized stock compensation ....................................      (150.9)          (178.9)
     Accumulated other comprehensive income ............................       222.4            268.5
     Treasury stock ....................................................    (1,149.5)          (840.6)
                                                                           ---------        ---------
                  Total Shareholders' Equity ...........................     3,852.5          4,078.7
                                                                           ---------        ---------
                  TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY ...........   $15,049.5        $16,002.4
                                                                           =========        =========



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


                                       1


                       OMNICOM GROUP INC. AND SUBSIDIARIES
                   CONSOLIDATED CONDENSED STATEMENTS OF INCOME
                              (Dollars in Millions)
                                   (Unaudited)



                                                                 Three Months Ended March 31,
                                                                 ----------------------------
                                                                       2005         2004
                                                                       ----         ----
                                                                            
REVENUE ......................................................      $2,403.0      $2,231.4

OPERATING EXPENSES:
     Salary and service costs .................................      1,731.0       1,593.6
     Office and general expenses ..............................        414.7         408.5
                                                                    --------      --------
                                                                     2,145.7       2,002.1
                                                                    --------      --------
OPERATING PROFIT ..............................................        257.3         229.3

NET INTEREST EXPENSE:
     Interest expense .........................................         17.3          13.7
     Interest income ..........................................         (5.2)         (3.3)
                                                                    --------      --------
                                                                        12.1          10.4
                                                                    --------      --------
INCOME BEFORE INCOME TAXES ....................................        245.2         218.9

INCOME TAXES ..................................................         86.1          73.6
                                                                    --------      --------
INCOME AFTER INCOME TAXES .....................................        159.1         145.3

EQUITY IN AFFILIATES ..........................................          5.2           2.5

MINORITY INTERESTS ............................................        (13.8)        (12.2)
                                                                    --------      --------
        NET INCOME ............................................     $  150.5      $  135.6
                                                                    ========      ========
NET INCOME PER COMMON SHARE:
        Basic .................................................     $   0.82      $   0.72
        Diluted ...............................................     $   0.82      $   0.72
DIVIDENDS DECLARED PER COMMON SHARE ...........................     $  0.225      $  0.225



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


                                       2


                       OMNICOM GROUP INC. AND SUBSIDIARIES
                 CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS
                              (Dollars in Millions)
                                   (Unaudited)



                                                                         Three Months Ended March 31,
                                                                         ----------------------------
                                                                               2005        2004
                                                                               ----        ----
                                                                                  
Cash flows from operating activities:
Net income ............................................................     $  150.5    $  135.6
     Adjustments to reconcile net income to net cash provided
        by operating activities:
     Depreciation of tangible assets ..................................         32.7        34.7
     Amortization of intangible assets ................................          9.0        10.5
     Minority interests ...............................................         13.8        12.2
     Earnings of affiliates (in excess of) less than dividends received         (2.8)        1.7
     Net gain on investment activity ..................................         (7.4)      (13.1)
     Tax benefit on employee stock plans ..............................         13.6         5.1
     Provisions for losses on accounts receivable .....................          1.0         0.8
     Amortization of stock compensation ...............................         26.0        31.7
     Changes in assets and liabilities providing (requiring) cash,
        net of acquisitions:
     Increase in accounts receivable ..................................       (185.8)     (192.1)
     Increase in billable production orders in process ................        (87.7)     (106.5)
     Increase in prepaid expenses and other current assets ............        (97.4)      (41.1)
     Net change in other assets and liabilities .......................        (53.7)      (64.4)
     Increase (decrease) in advanced billings .........................         40.5        (2.0)
     Net decrease in accrued and deferred taxes .......................         (9.7)      (56.8)
     Decrease in accounts payable .....................................       (559.6)     (543.6)
                                                                            --------    --------
        Net cash used for operating activities ........................       (717.0)     (787.3)
                                                                            --------    --------
Cash flows from investing activities:
     Capital expenditures .............................................        (30.1)      (45.4)
     Payments for purchases of equity interests in subsidiaries and
        affiliates, net of cash acquired ..............................        (23.1)      (31.6)
     Proceeds from sale of assets .....................................         29.3         0.0
     Purchases of short-term investments ..............................       (324.9)     (657.3)
     Proceeds from sale of short-term investments .....................        881.6       938.3
                                                                            --------    --------
        Net cash provided by investing activities .....................        532.8       204.0
                                                                            --------    --------
Cash flows from financing activities:
     (Decrease) increase in short-term borrowings .....................         (5.2)       20.2
     Proceeds from issuance of debt ...................................          0.2         1.7
     Repayments of principal of long-term debt obligations ............         (2.6)      (10.5)
     Dividends paid ...................................................        (41.6)      (37.6)
     Purchase of treasury shares ......................................       (377.9)     (141.1)
     Other, net .......................................................         37.6         6.5
                                                                            --------    --------
        Net cash used in financing activities .........................       (389.5)     (160.8)
                                                                            --------    --------
Effect of exchange rate changes on cash and cash equivalents ..........         (3.8)       19.9
                                                                            --------    --------
        Net decrease in cash and cash equivalents .....................       (577.5)     (724.2)
Cash and cash equivalents at beginning of period ......................      1,165.6     1,243.5
                                                                            --------    --------
Cash and cash equivalents at end of period ............................     $  588.1    $  519.3
                                                                            ========    ========

Supplemental disclosures:
     Income taxes paid ................................................     $   69.1    $   51.2
     Interest paid ....................................................     $   11.7    $   11.3



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


                                       3


                       OMNICOM GROUP INC. AND SUBSIDIARIES
              NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS

1.    We have prepared the consolidated condensed interim financial statements
      included herein without audit pursuant to Securities and Exchange
      Commission rules. Certain information and footnote disclosures normally
      included in financial statements prepared in accordance with generally
      accepted accounting principles ("GAAP") have been condensed or omitted
      pursuant to these rules.

2.    The accompanying financial statements reflect all adjustments, consisting
      of normally recurring accruals, which in the opinion of management are
      necessary for a fair presentation, in all material respects, of the
      information contained therein. Certain amounts in prior periods have been
      reclassified to conform them to the quarter end March 31, 2005
      presentation. These statements should be read in conjunction with the
      consolidated financial statements and related notes included in our annual
      report on Form 10-K for the year ended December 31, 2004.

3.    Results of operations for interim periods are not necessarily indicative
      of annual results.

4.    Basic earnings per share is based upon the weighted average number of
      common shares outstanding during the period. Diluted earnings per share is
      based on the above, plus, if dilutive, common share equivalents which
      include outstanding options and restricted shares. For purposes of
      computing diluted earnings per share, 1,161,000 and 832,000 common share
      equivalents were assumed to be outstanding for the three months ended
      March 31, 2005 and 2004, respectively.

            The assumed increase in net income related to the after tax
      compensation expense related to dividends on restricted shares was $314.8
      thousand and $274.8 thousand for the three months ended March 31, 2005 and
      2004, respectively.

            The number of shares used in our EPS computations were:

                                                  Three Months
                                                 Ended March 31,
                                      --------------------------------------
                                          2005                       2004
                                          ----                       ----
       Basic EPS Computation          182,644,000                187,852,000
       Diluted EPS Computation        183,805,000                188,684,000


                                       4



                       OMNICOM GROUP INC. AND SUBSIDIARIES
        NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS (Continued)

5.    Total comprehensive income and its components were:



                                                                          (Dollars in Millions)
                                                                              Three Months
                                                                             Ended March 31,
                                                                         -----------------------
                                                                           2005            2004
                                                                         -------         -------
                                                                                    
Net income for the period .............................................   $150.5          $135.6

Foreign currency translation adjustment, net of income taxes of $(24.8)
and $13.9 for the three months ended March 31, 2005
and 2004, respectively ................................................    (46.1)           25.7
                                                                          ------          ------
Comprehensive income for the period ...................................   $104.4          $161.3
                                                                          ======          ======



6.    Our wholly and partially owned agencies operate within the advertising,
      marketing and corporate communications services industry. These agencies
      are organized into agency networks, virtual client networks, regional
      reporting units and operating groups. Consistent with the fundamentals of
      our business strategy, our agencies serve similar clients, in similar
      industries, and in many cases, the same clients across a variety of
      geographies. In addition, our agency networks have similar economic
      characteristics and similar long-term operating margins, as the main
      economic components of each agency are the salary and service costs
      associated with providing professional services, the office and general
      costs associated with office space and occupancy, and the provision of
      technology requirements which are generally limited to personal computers,
      servers and off-the-shelf software. Therefore, given these similarities
      and in accordance with the provisions of SFAS 131 - Disclosures about
      Segments of an Enterprise and Related Information, most specifically
      paragraph 17, we aggregate our operating segments, which are our agency
      networks, into one reporting segment.

            A summary of our revenue and long-lived assets by geographic area as
      of March 31, 2005 and 2004 is presented below:



                                                                       (in millions of dollars)
                                      ---------------------------------------------------------------------------------
                                        United             Euro            United             Other
                                        States          Denominated        Kingdom        International    Consolidated
                                        ------          -----------        -------        -------------    ------------
                                                                                             
       Revenue
       Three Months Ended March 31,
          2005                        $ 1,312.1        $    506.2        $   265.4        $    319.3        $ 2,403.0
          2004                          1,221.2             455.8            251.1             303.3          2,231.4

       Long-lived Assets
       at March 31,
          2005                        $   327.3        $    106.7        $    91.3        $     91.8        $   617.1
          2004                            335.2             101.0             93.0              90.0            619.2



                                       5



                       OMNICOM GROUP INC. AND SUBSIDIARIES
        NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS (Continued)

7.    Bank loans at March 31, 2005 of $11.9 million are primarily comprised of
      bank overdrafts of our international subsidiaries which are treated as
      unsecured loans pursuant to our bank agreements. We had unsecured
      committed revolving credit facilities of $2,000.0 million as of March 31,
      2005. There were no borrowings under the revolving credit facilities and
      no commercial paper was outstanding as of March 31, 2005.

8.    Included in operating income for the three months ended March 31, 2005 is
      a pre-tax net gain of $6.9 million arising from the sale of a majority
      owned business located in Australia and New Zealand and the disposal of a
      non-strategic business located in the United States. Due to an unusually
      high book tax rate caused by the non-deductibility of goodwill, the book
      tax cost of the transactions was $6.1 million. After deducting minority
      interest expense, the impact of these transactions increased net income by
      $0.4 million.

9.    In 2002, the Financial Accounting Standards Board ("FASB") issued
      Statement of Financial Accounting Standards No. 148 (SFAS 148),
      "Accounting for Stock-Based Compensation - Transition and Disclosure - An
      Amendment of FASB No. 123". We adopted Statement of Financial Accounting
      Standards No. 123 (SFAS 123), "Accounting for Stock-Based Compensation"
      effective January 1, 2004. Pre-tax stock-based employee compensation costs
      for the three months ended March 31, 2005 and 2004, were $26.0 million and
      $31.7 million, respectively.

            In December 2004, the FASB issued SFAS No. 123R which is effective
      for reporting periods beginning after June 15, 2005 and generally applies
      to grants made after adoption. SFAS 123R is a revision of SFAS 123.
      Recently, the SEC Staff delayed the effective date of SFAS 123R to the
      first quarter of 2006 for grants made after January 1, 2006. As a result
      of our adoption of SFAS 123, as amended by SFAS 148, on January 1, 2004,
      we believe that the adoption of SFAS 123R will not have a material impact
      on our consolidated results of operations or financial position. However,
      we are in the process of assessing the full impact of this revision.

10.   Beginning on June 13, 2002, several putative class actions were filed
      against us and certain senior executives in the United States District
      Court for the Southern District of New York. The actions have since been
      consolidated under the caption In re Omnicom Group Inc. Securities
      Litigation, No. 02-CV4483 (RCC), on behalf of a proposed class of
      purchasers of our common stock between February 20, 2001 and June 11,
      2002. The consolidated complaint alleges, among other things, that our
      public filings and other public statements during that period contained
      false and misleading statements or omitted to state material information
      relating to (1) our calculation of the organic growth component of
      period-to-period revenue growth, (2) our valuation of and accounting for
      certain internet investments made by our Communicade Group
      ("Communicade"), which we contributed to Seneca




                                       6


                       OMNICOM GROUP INC. AND SUBSIDIARIES
        NOTES TO CONSOLIDATED CONDENSED FINANCIAL STATEMENTS (Continued)


      Investments LLC ("Seneca") in 2001, and (3) the existence and amount of
      certain contingent future obligations in respect of acquisitions. The
      complaint seeks an unspecified amount of compensatory damages plus costs
      and attorneys' fees. Defendants moved to dismiss the complaint and on
      March 28, 2005, the court dismissed portions (1) and (3) of the complaint
      detailed above. The court's decision denying the defendants' motion to
      dismiss the remainder of the complaint did not address the ultimate merits
      of the case, but only the sufficiency of the pleading. Defendants have
      answered the complaint, and discovery has commenced.

            In addition, on June 28, 2002, a derivative action was filed on
      behalf of Omnicom in New York state court. The derivative action questions
      the business judgment of certain current and former directors of Omnicom,
      by challenging, among other things, the valuation of and accounting for
      the internet investments made by Communicade and the contribution of those
      investments to Seneca. The complaint alleges breaches of fiduciary duty,
      disclosure failures, abuse of control and gross mismanagement by the
      directors. The lawsuit seeks from the directors the amount of profits
      received from selling Omnicom stock and other unspecified damages to be
      paid to the Company, as well as costs and attorneys' fees. On February 18,
      2005, a second shareholder derivative action, again purportedly brought on
      behalf of the Company and making similar claims, was filed in New York
      state court. A proposed order is pending that will consolidate the two
      derivative actions before Justice Karla Moskowitz and appoint co-lead
      plaintiffs' counsel. Under the proposed order, plaintiffs will file an
      amended complaint twenty days after the derivative actions are
      consolidated and the defendants will move against or otherwise respond to
      the amended complaint 45 days thereafter.

            The defendants in both cases believe that the allegations against
      them are baseless and intend to vigorously oppose the lawsuits. Currently,
      we are unable to determine the outcome of these cases and the effect on
      our financial position or results of operations. The outcome of any of
      these matters is inherently uncertain and may be affected by future
      events. Accordingly, there can be no assurance as to the ultimate effect
      of these matters.


                                       7


ITEM  2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS

Executive Summary

      We are a strategic holding company. We provide professional services to
clients through multiple agencies around the world. On a global, pan-regional
and local basis, our agencies provide these services in the following
disciplines: traditional media advertising, customer relationship management,
public relations and specialty communications. Our business model was built and
evolves around clients. While our companies operate under different names and
frame their ideas in different disciplines, we organize our services around
clients. The fundamental premise of our business is that our clients' specific
requirements should be the central focus in how we structure our business
offering and allocate our resources. This client-centric business model results
in multiple agencies collaborating in formal and informal virtual networks that
cut across internal organizational structures to deliver consistent brand
messages for a specific client and execute against our clients' specific
marketing requirements. We continually seek to grow our business with our
existing clients by maintaining our client-centric approach, as well as
expanding our existing business relationships into new markets and new clients.
In addition, we pursue selective acquisitions of complementary companies with
strong entrepreneurial management teams that typically either currently serve or
have the ability to serve our existing client base.

      Globally, during the past few years, the overall industry has continued to
be affected by geopolitical unrest, lagging economic conditions, lack of
consumer confidence and cautious client spending. All of these factors
contributed to a difficult business environment and industry-wide margin
contraction. During this period, we have continued to invest in our businesses
and our personnel, and have taken actions to reduce costs at some of our
agencies to address the changing economic circumstances.

      Several long-term trends continue to positively affect our business,
including our clients increasingly expanding the focus of their brand strategies
from national markets to pan-regional and global markets. Additionally, in an
effort to gain greater efficiency and effectiveness from their marketing
dollars, clients are increasingly requiring greater coordination of their
traditional advertising and marketing activities and concentrating these
activities with a smaller number of service providers.

      Given our size and breadth, we manage the business by monitoring several
financial and non-financial performance indicators. The key financial
performance indicators that we review focus on the areas of revenues and
operating expenses.

      Revenue growth is analyzed by reviewing the components and mix of the
growth, including: growth by major geographic location; growth by major
marketing discipline; growth from currency changes; growth from acquisition and
growth from our largest clients.




                                       8


ITEM  2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS (Continued)

      In recent years, our revenue has historically been divided almost evenly
between domestic and international operations. For the three months ended March
31, 2005, our overall revenue growth was 7.7% compared to the prior year period,
of which 2.1% was related to changes in foreign exchange rates and (0.2)% was
related to entities acquired, net of disposals. The remaining 5.8% was organic
growth.

      We measure operating expenses in two distinct cost categories: salary and
service costs, and office and general expenses. Salary and service costs are
comprised primarily of employee compensation related costs. Office and general
expenses are comprised primarily of rent and occupancy costs, technology related
costs and depreciation and amortization.

      Each of our agencies require service professionals with a skill set that
is common across our disciplines. At the core is their ability to understand a
client's brand and its selling proposition, and their ability to develop a
unique message to communicate the value of the brand to the client's target
audience. The office space requirements of our agencies are also similar across
geographies and disciplines, and their technology requirements are generally
limited to personal computers, servers and off-the-shelf software.

      Because we are a service business, we monitor these costs on a percentage
of revenue basis. Salary and service costs tend to fluctuate in conjunction with
changes in revenues, whereas office and general expenses, which are not directly
related to servicing clients, tend to decrease as a percentage of revenue as
revenues increase because a significant portion of these expenses are relatively
fixed in nature. During the first three months of 2005, salary and service costs
increased to 72.0% of revenue from 71.4% of revenue in the first three months of
2004, due to increased staffing levels at certain of our companies, and due in
part to our continuing efforts to restore incentive-based compensation. Office
and general expenses declined to 17.3% of revenue in the first three months of
2005 from 18.3% in the first three months of 2004, as a result of our continuing
efforts to better align these costs with business levels on a
location-by-location basis.

      Our net income for the first quarter of 2005 increased by 11.0% to $150.5
million from $135.6 million in the first quarter of 2004, and our diluted EPS
increased by 13.9% to $0.82 from $0.72.


                                       9


ITEM  2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS (Continued)

Results of Operations: First Quarter 2005 Compared to First Quarter 2004

      Revenue: Our first quarter of 2005 consolidated worldwide revenue
increased 7.7% to $2,403.0 million from $2,231.4 million in the comparable
period last year. The effect of foreign exchange impacts increased worldwide
revenue by $47.7 million. Acquisitions, net of disposals, decreased worldwide
revenue by $4.8 million in the first quarter of 2005 and organic growth
increased worldwide revenue by $128.7 million. The components of the first
quarter 2005 revenue growth in the U.S. ("domestic") and the remainder of the
world ("international") are summarized below ($ in millions):



                                                     Total             Domestic            International
                                               ----------------      ---------------      -----------------
                                                   $         %           $       %            $         %
                                               --------     ---      --------   ----       ---------  -----
                                                                                      
First Quarter ended March 31, 2004 .......     $ 2,231.4     --      $ 1,221.2    --       $ 1,010.2    --

Components of Revenue Changes:

Foreign exchange impact ..................          47.7    2.1%            --    --            47.7    4.7%
Acquisitions .............................          (4.8)  (0.2)%         13.2   1.1%          (18.0)  (1.7)%
Organic ..................................         128.7    5.8%          77.7   6.4%           51.0    5.0%
                                               ---------    ---      ---------   ---       ---------    ---
First Quarter ended March 31, 2005             $ 2,403.0    7.7%     $ 1,312.1   7.5%      $ 1,090.9    8.0%
                                               =========    ===      =========   ===       =========    ===



The components and percentages are calculated as follows:

      o     The foreign exchange impact component shown in the table is
            calculated by first converting the current period's local currency
            revenue using the average exchange rates from the equivalent prior
            period to arrive at a constant currency revenue (in this case
            $2,355.3 million for the Total column in the table). The foreign
            exchange impact equals the difference between the current period
            revenue in U.S. dollars and the current period revenue in constant
            currency (in this case $2,403.0 million less $2,355.3 million for
            the Total column in the table).

      o     The acquisitions component shown in the table is calculated by
            aggregating the applicable prior period revenue of the acquired
            businesses. Netted against this number is the revenue of any
            business included in the prior period reported revenue that was
            disposed of subsequent to the prior period.

      o     The organic component shown in the table is calculated by
            subtracting both the foreign exchange and acquisition revenue
            components from total revenue growth.

      o     The percentage change shown in the table of each component is
            calculated by dividing the individual component amount by the prior
            period revenue base of that component (in this case $2,231.4 million
            for the Total column in the table).


                                       10


ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS (Continued)

      The components of revenue and revenue growth in our primary geographic
markets for the first quarter of 2005 compared to the first quarter of 2004 are
summarized below ($ in millions):

                                                     $ Revenue         % Growth
                                                     ---------         --------
            United States.......................     $  1,312.1            7.5%
            Euro Denominated Markets............          506.2           11.0%
            United Kingdom......................          265.4            5.7%
            Other...............................          319.3            5.2%
                                                     ----------            ---
            Total...............................     $  2,403.0            7.7%
                                                     ==========            ===

      As indicated, foreign exchange impacts increased our international revenue
by $47.7 million during the quarter ended March 31, 2005. The most significant
impacts resulted from the continued period-over-period strengthening of the Euro
and the British Pound against the U.S. dollar, as our operations in these
markets represented approximately 70% of our international revenue.

      Driven by our clients' continuous demand for more effective and efficient
branding activities, we strive to provide an extensive range of advertising,
marketing and corporate communications services through various client-centric
networks that are organized to meet specific client objectives. These services
include advertising, brand consultancy, crisis communications, custom
publishing, database management, digital and interactive marketing, direct
marketing, directory advertising, entertainment marketing, environmental design,
experiential marketing, field marketing, financial/corporate
business-to-business advertising, graphic arts, healthcare communications,
instore design, investor relations, marketing research, media planning and
buying, multi-cultural marketing, non-profit marketing, organizational
communications, package design, product placement, promotional marketing, public
affairs, public relations, real estate advertising and marketing, recruitment
communications, reputation consulting, retail marketing and sports and event
marketing. In an effort to monitor the changing needs of our clients and to
further expand the scope of our services to key clients, we monitor revenue
across a broad range of disciplines and group them into the following four
categories: traditional media advertising, customer relationship management
(referred to as CRM), public relations and specialty communications, as
summarized below.



                                                          (Dollars in Millions)
                                                          ---------------------
                                 1st Quarter       % of      1st Quarter        % of       $         %
                                     2005         Revenue        2004          Revenue   Growth    Growth
                                 ----------      -------     -----------       -------   ------    ------
                                                                                 
Traditional media advertising    $  1,049.7        43.7%     $    977.3         43.8%  $   72.4    7.4%
CRM .........................         811.0        33.7%          750.1         33.6%      60.9    8.1%
Public relations ............         256.3        10.7%          239.2         10.7%      17.1    7.1%
Specialty communications ....         286.0        11.9%          264.8         11.9%      21.2    8.0%
                                 ----------                  ----------                --------
                                 $  2,403.0                  $  2,231.4                $  171.6    7.7%
                                 ==========                  ==========                ========



                                       11


ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS (Continued)

      Operating Expenses: Our first quarter 2005 worldwide operating expenses
increased $143.6 million, or 7.2%, to $2,145.7 million from $2,002.1 million in
the first quarter of 2004, as shown below.




                                                                         (Dollars in Millions)
                                   ------------------------------------------------------------------------------------
                                                                      Three Months Ended March 31,
                                   ------------------------------------------------------------------------------------
                                                2005                             2004                    2005 vs 2004
                                   ------------------------------    ------------------------------    ----------------
                                                  %         % of                  %            % of
                                                 of       Total Op.               of         Total Op.     $         %
                                        $      Revenue     Costs         $      Revenue       Costs      Growth    Growth
                                   ----------  ------       ----     ---------    ----         ----      ------     ---
                                                                                           
Revenue .......................    $  2,403.0                        $ 2,231.4                           $171.6     7.7%

Operating expenses:
    Salary and service costs ..       1,731.0    72.0%      80.7%      1,593.6    71.4%        79.6%      137.4     8.6%
    Office and general expenses         414.7    17.3%      19.3%        408.5    18.3%        20.4%        6.2     1.5%
                                   ----------    ----       ----     ---------    ----         ----    --------    ----
Total Operating Costs .........       2,145.7    89.3%                 2,002.1    89.7%                   143.6     7.2%

Operating profit ..............    $    257.3    10.7%               $   229.3    10.3%                $   28.0    12.2%
                                   ==========                        =========                         ========



      Salary and service costs, which are comprised of direct service costs and
salary and related costs, increased by $137.4 million, or 8.6%, and represented
80.7% of total operating expenses in the first quarter of 2005 versus 79.6% in
the first quarter of 2004. Most, or $137.4 million and 95.7%, of the $143.6
million increase in operating expenses in the first quarter of 2005 resulted
from increases in salary and service costs. This increase was attributable to
increased revenue levels and the required increases in direct salary and salary
related costs necessary to deliver our services, including increases in
incentive compensation costs, increases in freelance labor costs and increases
in costs relating to new business initiatives. This was partially offset by a
reduction in severance costs and the expected positive impact in the quarter of
previous cost actions. As a result, salary and service costs as a percentage of
revenues increased from 71.4% in the first quarter of 2004 to 72.0% in the first
quarter of 2005.

      Office and general expenses, which are comprised of office and equipment
rent, technology costs and depreciation and amortization of identifiable
intangibles, professional fees and other overhead expenses, increased by $6.2
million, or 1.5%, in the first quarter of 2005 compared to the same period in
2004. Office and general expenses decreased as a percentage of our total
operating costs in the first quarter of 2005 to 19.3% versus 20.4% in the prior
period. Additionally, as a percentage of revenue, office and general expenses
decreased in the first quarter of 2005 to 17.3% from 18.3% in the first quarter
of 2004, because these expenses are relatively fixed in nature and do not
necessarily change relative to our revenue growth or changes in our salary and
services costs. Included in office and general expenses in the first quarter of
2005 was a pre-tax net gain related to the sale of a majority owned business
located in Australia and New Zealand and the disposal of a non-strategic
business located in the United States. Additionally, included in office and
general expenses in the first quarter of 2004 was a pre-tax net gain arising
from Seneca Investment LLC's recapitalization, offset by losses from the
disposal of other cost-based investments and costs incurred in connection with
the disposal of two non-strategic businesses. The impact of these transactions
on our operating income, margins, income taxes and net income is summarized
below:


                                       12


ITEM  2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS (Continued)



                                    First Quarter 2005                      First Quarter 2004
                              --------------------------------       --------------------------------
                                              Net                                  Net                        %
                              Reported       Gains    Adjusted       Reported     Gains      Adjusted      Change
                              --------       -----    --------       --------     -----      --------      ------
                                                                                        
Revenue ................    $  2,403.0    $  --      $  2,403.0    $  2,231.4    $  --      $  2,231.4       7.7%

Operating Profit .......         257.3       (6.9)        250.4         229.3       (3.2)        226.1      10.7%
   % Margin ............          10.7%      (0.3)%        10.4%         10.3%      (0.1)%        10.1%

Net Interest Expense ...          12.1         --          12.1          10.4         --          10.4
                            ----------    -------    ----------    ----------    -------    ----------

Income Before Income Tax         245.2       (6.9)        238.3         218.9       (3.2)        215.7      10.5%
   % Margin ............          10.2%      (0.3)%         9.9%          9.8%      (0.1)%         9.7%

Income Taxes ...........          86.1       (6.1)         80.0          73.6       (2.1)         71.5
   % Tax Rate ..........          35.1%      88.4%         33.6%         33.6%      65.6%         33.1%
                            ----------    -------    ----------    ----------    -------    ----------
Income After Income Tax          159.1       (0.8)        158.3         145.3       (1.1)        144.2       9.8%

Equity in Affiliates ...           5.2         --           5.2           2.5         --           2.5

Minority Interests .....         (13.8)       0.4         (13.4)        (12.2)        --         (12.2)
                            ----------    -------    ----------    ----------    -------    ----------
Net Income .............    $    150.5    $  (0.4)   $    150.1    $    135.6    $  (1.1)   $    134.5      11.6%
                            ==========    =======    ==========    ==========    =======    ==========



      The table above is intended to facilitate the above discussion regarding
the results of our operations. As a result of the adjustments above, the
"Adjusted" numbers are non-GAAP measures. We believe that by making the
adjustments above, the "Adjusted" numbers are more comparable to previous
quarters and thus more meaningful for the purpose of this analysis. The impact
on revenue of these dispositions is included in our discussion of changes in the
Revenue section on page 10 and the impact on operating results was not
significant.

      Net Interest Expense: Our net interest expense in the first quarter of
2005 was $12.1 million, up from $10.4 million in the same period in 2004. The
increase resulted from $3.6 million of additional interest costs associated with
the amortization of payments we made to consenting holders of our convertible
notes during the second half of 2004, as an incentive to the noteholders to
consent to certain amendments to our indentures and not to exercise certain put
rights. In August 2004, we paid $24.5 million in the aggregate to consenting
holders of our Zero Coupon Zero Yield Convertible Notes due 2032 and in November
2004, we paid $14.8 million and $1.2 million in the aggregate to consenting
holders of our Liquid Yield Option Notes due 2031 and Zero Coupon Zero Yield
Convertible Notes due 2033, respectively. Furthermore, interest expense relative
to our (euro)152.4 million 5.20% Euro notes increased due to the foreign
currency change of the Euro relative to the U.S. dollar. This increase was
partially offset by lower short-term interest rates and cash management efforts
during the quarter.

      Income Taxes: Our consolidated effective income tax rate was 35.1% in the
first quarter of 2005. Excluding the impact related to the gain, as set forth in
the table above, our tax rate was 33.6% in the first quarter of 2005, which is
comparable to our full year rate for 2004.



                                       13


         Earnings Per Share (EPS): For the foregoing reasons, our net income in
the first quarter of 2005 increased $14.9 million, or by 11.0%, to $150.5
million from $135.6 million in the first quarter of 2004. Diluted earnings per
share increased 13.9% to $0.82 in the first quarter of 2005, as compared to
$0.72 in the prior year period for the reasons described above, as well as the
impact of our purchase of treasury shares.


                                       14


ITEM  2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS (Continued)

Critical Accounting Policies

      To assist in better understanding our financial statements and the related
management's discussion and analysis of those results, readers are encouraged to
consider this information together with our discussion of our critical
accounting policies under the heading "Management's Discussion and Analysis of
Financial Condition and Results of Operations" in our Annual Report on Form 10-K
for the year ended December 31, 2004 (the "2004 Form 10-K"), as well as our
consolidated financial statements and the related notes included in our 2004
Form 10-K, for a more complete understanding of all of our accounting policies.

New Accounting Pronouncements

      In December 2004, the FASB issued SFAS No. 123R which has become effective
for reporting periods beginning after June 15, 2005 and generally applies to
grants made after adoption. SFAS 123R is a revision of SFAS 123. Recently, the
SEC staff delayed the effective date of SFAS 123R to the first quarter of 2006
for grants made after January 1, 2006. As a result of our adoption of SFAS 123,
as amended by SFAS 148, on January 1, 2004, we believe that the adoption of SFAS
123R will not have a material impact on our consolidated results of operations
or financial position. However, we are in the process of assessing the full
impact of this revision.

      The FASB issued two staff proposals on accounting for income taxes to
address recent changes enacted by the United States Congress. Proposed Staff
Position FAS 109-a, Application of FASB Statement No. 109, Accounting for Income
Taxes, for the Tax Deduction Provided to U.S. Based Manufacturers by the
American Jobs Creation Act of 2004, and Proposed Staff Position FAS 109-b,
Accounting and Disclosure Guidance for the Foreign Earnings Repatriation
Provisions within the American Jobs Creation Act of 2004. We believe that
Proposed Staff Position FAS 109-a does not apply to our business and we are
currently assessing the impact of Proposed Staff Position FAS 109-b; however, we
do not believe it will have a material impact on our consolidated results of
operations or financial position.


                                       15


ITEM  2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS (Continued)

Contingent Acquisition Obligations

      Certain of our acquisitions are structured with contingent purchase price
obligations, often referred to as earn-outs. We utilize contingent purchase
price structures in an effort to minimize the risk to us associated with
potential future negative changes in the performance of the acquired entity
during the post-acquisition transition period. These payments are not contingent
upon future employment. The aggregate amount of future contingent purchase price
payments that we would be required to pay for prior acquisitions, assuming that
the businesses perform over the relevant future periods at their current profit
levels, is approximately $428 million as of March 31, 2005. The ultimate amounts
payable cannot be predicted with reasonable certainty because it is dependent
upon future results of operations of subject businesses and is subject to
changes in foreign currency exchange rates. In accordance with GAAP, we have not
recorded a liability for these items on our balance sheet since the definitive
amount is not determinable or distributable. Actual results can differ from
these estimates and the actual amounts that we pay are likely to be different
from these estimates. Our obligations change from period to period primarily as
a result of payments made during the current period, changes in the acquired
entities' performance and changes in foreign currency exchange rates. These
differences could be significant. The contingent purchase price obligations as
of March 31, 2005, calculated assuming that the acquired businesses perform over
the relevant future periods at their current profit levels, are as follows:



                                              (Dollars in Millions)
          ----------------------------------------------------------------------------------------------
          Remainder                                                             There-
             2005             2006              2007             2008           after             Total
          ---------           ----              ----             ----           -----             -----
                                                                                   
         $   211           $   78           $    82           $    38           $   19           $   428


      In addition, owners of interests in certain of our subsidiaries or
affiliates have the right in certain circumstances to require us to purchase
additional ownership stakes in those companies. Assuming that the subsidiaries
and affiliates perform over the relevant periods at their current profit levels,
the aggregate amount we could be required to pay in future periods is
approximately $250 million, $137 million of which, relate to obligations that
are currently exercisable. If these rights are exercised, there would be an
increase in our net income as a result of our increased ownership and the
reduction of minority interest expense. The ultimate amount payable relating to
these transactions will vary because it is primarily dependent on the future
results of operations of the subject businesses, the timing of the exercise of
these rights and changes in foreign currency exchange rates. The actual amount
that we pay is likely to be different from this estimate and the difference
could be significant. The obligations that exist for these agreements as of
March 31, 2005, calculated using the assumptions above, are as follows:

                                                    (Dollars in Millions)
                                            ------------------------------------
                                             Currently   Not Currently
                                            Exercisable    Exercisable     Total
                                            -----------    -----------     -----
Subsidiary agencies ..................         $112           $100         $212
Affiliated agencies ..................           25             13           38
                                               ----           ----         ----
     Total ...........................         $137           $113         $250
                                               ====           ====         ====



                                       16



ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
        OF OPERATIONS (Continued)

Liquidity and Capital Resources

      Our principal non-discretionary funding requirement is our working capital
requirement. In addition, we have contractual obligations related to our debt
and convertible notes, our recurring business operations primarily related to
lease obligations, as well as certain contingent acquisition obligations related
to acquisitions made in prior years. Historically, substantially all of our
non-discretionary cash requirements have been funded from operating cash flow.

      Our principal discretionary cash requirements include dividend payments to
our shareholders, repurchases of our stock, payments for strategic acquisitions
and capital expenditures.

      We have a seasonal working capital cycle. Working capital requirements are
lowest at year-end and higher during the first, second and third quarters. This
occurs because in the majority of our businesses we act as agent on behalf of
our clients, including when we place media and incur production costs on their
behalf. We generally require collection from our clients prior to our payment
for the media and production cost obligations and these obligations are greatest
at the end of the year.

      Historically, on an annual basis, our discretionary and non-discretionary
spending has been funded from operating cash flow. However, during the year we
manage liquidity by utilizing our credit facilities discussed below.

      Liquidity: We had cash and cash equivalents totaling $588.1 million and
$1,165.6 million at March 31, 2005 and December 31, 2004, respectively. We also
had short-term investments totaling $17.3 million and $574.0 million at March
31, 2005 and December 31, 2004, respectively. Consistent with our historical
trends in the first three months of the year, we had negative cash flow from
operations of $717.0 million. We funded this deficit primarily with cash on
hand, liquidation of short-term investments and by managing our working capital.

      Capital Resources: On May 24, 2004, we amended and extended our existing
revolving credit facilities with a consortium of banks, resulting in a five-year
$1,500.0 million revolving credit facility which matures May 24, 2009, and a
$500.0 million 364-day revolving credit facility with a maturity date of May 23,
2005, which we expect to amend and extend in the near future. These facilities
amended our previous three-year, $835.0 million and $1,200.0 million, 364-day
revolving credit facilities. We are also an active participant in the commercial
paper market with a $1,500.0 million program. Each of our bank credit facilities
provide credit support for issuances under this program. As of March 31, 2005,
no commercial paper was outstanding and we had no other borrowings outstanding
under these credit facilities. The 364-day facility includes a provision which
allows us to convert all amounts outstanding at expiration of the facility into
a one-year term loan. The consortium consists of 27 banks, each committing a pro
rata amount to the five-year and 364-day facilities. Citibank N.A. acts as
administrative agent, ABN Amro acts as syndication agent and JPMorgan Chase Bank
and HSBC Bank USA act as co-documentation agents for the facilities. Other
significant lending institutions include Societe Generale, Bank of America,
Wachovia and




                                       17


ITEM  2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
         OF OPERATIONS (Continued)


Sumitomo Mitsui. These facilities are a critical component in our analysis of
the liquidity and capital resources that provide us with the ability to classify
up to $2.0 billion of our borrowings that could come due within one year as
long-term debt, when it is our intention to keep the borrowings outstanding on a
long-term basis.

      Debt: We had short-term bank loans of $11.9 million and $17.5 million at
March 31, 2005 and December 31, 2004, respectively, which are comprised of
domestic borrowings and bank overdrafts of our international subsidiaries and
are treated as unsecured loans pursuant to our bank agreements.

      At March 31, 2005, we also had a total of $2,339.3 million aggregate
principal amount of convertible notes outstanding, including $847.0 million
Liquid Yield Option Notes due 2031, which were issued in February 2001, $892.3
million Zero Coupon Zero Yield Convertible Notes due 2032, which were issued in
March 2002, and $600.0 million Zero Coupon Zero Yield Convertible Notes due
2033, which were issued in June 2003.

      At March 31, 2005, we had Euro-denominated bonds outstanding of
(euro)152.4 million or $197.6 million. The bonds pay a fixed rate of 5.2% to
maturity in June 2005. While an increase in the value of the Euro against the
U.S. dollar results in a greater liability for interest and principal, there is
a corresponding increase in the dollar value of our Euro-denominated net assets.
We intend to redeem these Euro-denominated bonds in 2005 utilizing our available
cash, our credit facilities or a combination of both.

      Our outstanding debt and amounts available under these facilities as of
March 31, 2005 ($ in millions) were as follows:



                                                                                        Debt           Available
                                                                                    Outstanding         Credit
                                                                                    -----------         ------
                                                                                               
         Bank loans (due in less than 1 year)...................................    $      11.9               --
         $1,500.0 Million Revolver  -  due May 24, 2009.........................             --      $   1,500.0
         $500.0 Million - due May 23, 2005......................................             --            500.0
         (euro)152.4 million 5.20% Euro notes  -  due June 24, 2005.............          197.6               --
         Convertible notes  -  due February 7, 2031.............................          847.0               --
         Convertible notes  -  due July 31, 2032................................          892.3               --
         Convertible notes  -  due June 15, 2033................................          600.0               --
         Loan notes and sundry  -  various through 2010.........................           20.8               --
                                                                                    -----------      -----------
     Total......................................................................    $   2,569.6      $   2,000.0
                                                                                    ===========      ===========



      We believe that our operating cash flow combined with our available lines
of credit and our access to the capital markets are sufficient to support our
foreseeable cash requirements arising from working capital, outstanding debt,
capital expenditures, dividends and acquisitions.



                                       18


ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Market Risk

      Our results of operations are subject to risk from the translation to the
U.S. dollar of the revenue and expenses of our foreign operations, which are
generally denominated in the local currency. For the most part, our revenues and
the expenses incurred related to those revenues are denominated in the same
currency. This minimizes the impact that fluctuations in exchange rates have on
our profit margins.

      Our Annual Report on Form 10-K for the year ended December 31, 2004,
provides a more detailed discussion of the market risks affecting our
operations. As of March 31, 2005, no material change had occurred in our market
risks from the disclosure contained in that 10-K.

Forward-Looking Statements

      "Management's Discussion and Analysis of Financial Condition and Results
of Operations" and "Quantitative and Qualitative Disclosures About Market Risk"
and other information set forth in, or incorporated by reference into or
referenced in, this report contain disclosures which are forward-looking
statements within the meaning of the federal securities laws. Forward-looking
statements include all statements that do not relate solely to historical or
current facts, and can be identified by the use of words such as "may," "will,"
"expect," "project," "estimate," "anticipate," "envisage," "plan" or "continue."
These forward-looking statements are based upon our current plans or
expectations and are subject to a number of uncertainties and risks that could
significantly affect current plans and anticipated actions and our future
financial condition and results. The uncertainties and risks include, but are
not limited to, changes in general economic conditions, competitive factors,
client communication requirements, the hiring and retention of human resources
and other factors. In addition, our international operations are subject to the
risk of currency fluctuations, exchange controls and similar risks discussed
above. As a consequence, current plans, anticipated actions and future financial
condition and results may differ from those expressed in any forward-looking
statements made by us or on our behalf, and those differences could be material.


                                       19


ITEM 4. CONTROLS AND PROCEDURES

      We have established and maintain disclosure controls and procedures and
internal controls over financial reporting designed to ensure that information
required to be disclosed in our SEC reports is recorded, processed, summarized
and reported within applicable time periods. We conducted an evaluation, under
the supervision and with the participation of our management, including our CEO
and CFO, of the effectiveness of our disclosure controls and procedures as of
March 31, 2005. There have not been any changes in our internal controls over
financial reporting that occurred during our first fiscal quarter that has
materially affected or is reasonably likely to materially affect our internal
controls over financial reporting. Based on that evaluation, our CEO and CFO
concluded that as of March 31, 2005, our disclosure controls and procedures are
effective to ensure recording, processing, summarization and reporting of
information required to be included in our Quarterly Report on Form 10-Q for the
quarter ended March 31, 2005 as appropriate to allow timely decisions regarding
required disclosure. Our independent registered public accounting firm, KPMG
LLP, has audited our financial statements for the year ended December 31, 2004
and issued an attestation report, dated March 11, 2005, on our assessment of our
internal control over financial reporting.


                                       20


PART II. OTHER INFORMATION

Item 1. Legal Proceedings

The information regarding legal proceedings described in note 10 to the
condensed financial statements set forth in Part I of this report is
incorporated by reference into this Part II, Item 1.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

(c) The following table presents information with respect to purchases of our
common stock made during the three months ended March 31, 2005 by us or any of
our "affiliated purchasers".



                                                                             (c)
                                                                          Total Number                 (d)
                                      (a)                (b)         of Shares Purchased         Maximum Number
                                     Total             Average       As Part of Publicly      of Shares that May
                                   Number of         Price Paid         Announced Plans     Yet Be Purchased Under
   During the month:           Shares Purchased (1)   Per Share           or Programs        the Plans or Programs
   -----------------           --------------------   ---------           -----------        ---------------------
                                                                                            
January 1, 2005 through            1,723,272           $ 85.07                  --                      --
January 31, 2005

February 1, 2005 through
February 28, 2005                  1,321,500           $ 85.49

March 1, 2005 through
March 31, 2005                     1,375,000           $ 88.79                  --                      --
                                   ---------           -------                ----                    ----
Total                              4,419,772           $ 86.35                  --                      --
                                   =========           =======                ====                    ====



(1)   The shares were purchased in the open market for general corporate
      purposes.

Item 5. Other Information.

      None.

Item 6. Exhibits

(a) Exhibits

      10.1  Executive Salary Continuation Plan Agreement, dated as of October 2,
            2001, by and between Omnicom Group Inc. and Jean-Marie Dru.

      10.2  Executive Salary Continuation Plan Agreement, dated as of October 2,
            2001, by and between Omnicom Group Inc. and Andrew Robertson.

      10.3  Executive Salary Continuation Plan Agreement, dated as of December
            1, 1998, by and between Omnicom Group Inc. and Randall Weisenburger.



                                       21


      10.4  Employment Agreement, dated as of April 22, 2005, by and among
            Omnicom Group Inc., TBWA Worldwide Inc. and Jean-Marie Dru (Exhibit
            10.1 to the Form 8-K (Registration No. 001-10551) dated April 28,
            2005, and incorporated herein by reference).

      31.1  Certification of the Chief Executive Officer and President required
            by Rule 13(a)-14(a) under the Securities Exchange Act of 1934, as
            amended.

      31.2  Certification of the Executive Vice President and Chief Financial
            Officer required by Rule 13(a)-14(a) under the Securities Exchange
            Act of 1934, as amended.

      32.1  Certification of the Chief Executive Officer and President required
            by Rule 13(a)-14(a) under the Securities Exchange Act of 1934, as
            amended, and 18 U.S.C. ss.1350.

      32.2  Certification of the Executive Vice President and Chief Financial
            Officer required by Rule 13(a)-14(a) under the Securities Exchange
            Act of 1934, as amended and 18 U.S.C. ss.1350.


                                       22


                                   SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                             OMNICOM GROUP INC.

May 10, 2005                                 /s/ Randall J. Weisenburger
                                             -----------------------------------
                                             Randall J. Weisenburger
                                             Executive Vice President
                                             and Chief Financial Officer
                                             (on behalf of Omnicom Group Inc.
                                             and as Principal Financial Officer)


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