Exhibit 10.2 ASSUMPTION AGREEMENT June 30, 2003 Omnicom Group Inc. One East Weaver Street Greenwich, Connecticut 06831 Attention: Eric Huttner Citibank, N.A., as Agent for the Lenders party to the Credit Agreement referred to below Two Penns Way New Castle, Delaware 19720 Attention: Bank Loan Syndications Ladies and Gentlemen: Reference is made to the 364-Day Credit Agreement dated as of November 14, 2002 (as amended, supplemented or otherwise modified from time to time, the "Credit Agreement"; the terms defined therein being used herein as therein defined) among Omnicom Finance Inc., Omnicom Capital Inc. and Omnicom Finance plc (the "Borrowers"), Omnicom Group Inc. (the "Guarantor"), the Lenders (as defined in the Credit Agreement), Salomon Smith Barney Inc., as lead arranger and book manager, and Citibank, N.A., as agent . FIFTH THIRD BANK (the "Assuming Lender") agrees as follows: 1. The Assuming Lender proposes to become an Assuming Lender pursuant to Section 2.17 of the Credit Agreement and, in that connection, hereby agrees with the Agent and the Guarantor that it shall become a Lender for all purposes of the Credit Agreement on the Effective Date (as defined below). After giving effect to the Effective Date, the Assuming Lender's Commitment will be U.S.$15,000,000. 2. The Assuming Lender (a) confirms that it has received a copy of the Credit Agreement, together with copies of the financial statements referred to in Section 4.01(e) thereof and such other documents and information as it has deemed appropriate to make its own credit analysis and decision to enter into this Assumption Agreement; (b) agrees that it will, independently and without reliance upon the Agent or any other Lender and based on such documents and information as it shall deem appropriate at the time, continue to make its own credit decisions in taking or not taking action under the Credit Agreement; (c) appoints and authorizes the Agent to take such action as agent on its behalf and to exercise such powers and discretion under the Credit Agreement as are delegated to the Agent by the terms thereof, together with such powers and discretion as are reasonably incidental thereto; (d) agrees that it will perform in accordance with their terms all of the obligations that by the terms of the Credit Agreement are required to be performed by it as a Lender; (e) confirms that it is an Eligible Assignee; (f) specifies as its Applicable Lending Offices the offices set forth below its name on the signature page hereof; and (g) attaches any U.S. Internal Revenue Service forms or any certificates required to be provided by it under Section 2.13 of the Credit Agreement. 3. Following the execution of this Assumption Agreement, it will be delivered to the Agent for acceptance and recording by the Agent. The effective date for this Assumption Agreement (the "Effective Date") shall be June 30, 2003 4. Upon satisfaction of the applicable conditions set forth in Section 2.17 and in Article III of the Credit Agreement and upon such acceptance and recording by the Agent, as of the 1 Effective Date, the Assuming Lender shall be a party to the Credit Agreement and have all of the rights and obligations of a Lender thereunder. 5. This Assumption Agreement shall be governed by, and construed in accordance with, the laws of the State of New York. 6. This Assumption Agreement may be executed in any number of counterparts and by different parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. Delivery of an executed counterpart of this Assumption Agreement by telecopier shall be effective as delivery of a manually executed counterpart of this Assumption Agreement. Very truly yours, FIFTH THIRD BANK By /s/ Anne Pierson --------------------------------- Title: Corporate Banking Officer, Commercial Division Date: June 30, 2003 Base Rate Lending Office: Fifth Third Center 38 Fountain Square Plaza Cincinnati, OH 45202 Eurodollar Lending Office Fifth Third Center 38 Fountain Square Plaza Cincinnati, OH 45202 Accepted and Approved this 30 day of June, 2003 CITIBANK, N.A., as Agent By /s/ Carolyn A. Kee ------------------------------ Title: Managing Director Approved this 30 day of June, 2003 OMNICOM GROUP INC. By /s/ Dennis E. Hewitt ------------------------------ Title: Treasurer 2