Attached as Exhibit 100 to this Current Report on Form 8-K are the following financial statements from Omnicom Group Inc's. (the "Company") Annual Report on Form 10-K for the year ended December 31, 2008, filed with the Securities and Exchange Commission on February 27, 2009, formatted in Extensible Business Reporting Language ("XBRL"): (i) the Consolidated Statements of Income; (ii) the Consolidated Balance Sheets; (iii) the Consolidated Statements of Changes in Shareholders' Equity and Comprehensive Income; and, (iv) the Consolidated Statements of Cash Flows.

Users of this data are advised pursuant to Rule 401 of Regulation S-T that the financial and other information contained in the XBRL documents is unaudited and these documents are not the official publicly filed financial statements of the Company The purpose of submitting these XBRL formatted documents is to test the related format and technology and, as a result, investors should continue to rely on the official filed versions of all financial documents and not rely on the information in this Current Report on Form 8-K, including Exhibit 100, in making any investment decisions.

In accordance with Rule 402 of Regulation S-T, the information in this Current Report on Form 8-K, including Exhibit 100, shall not be deemed to be "filed" for purposes of Section 11 of the Securities Act of 1933, as amended, (the "Securities Act") or Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liability of those sections, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

(d) Exhibits.

Exhibit
Number  Description
------- ------------------------------------------------------------------------
  100   The following financial statements from the Company's Annual Report on
        Form 10-K for the year ended December 31, 2008, filed on February 27,
        2009 formatted in XBRL: (i) the Consolidated Statements of Income; (ii)
        the Consolidated Balance Sheets; (iii) the Consolidated Statements of
        Changes in Shareholders' Equity and Comprehensive Income; and, (iv) the
        Consolidated Statements of Cash Flows.


        100. INS XBRL Instance Document

        100.SCH XBRL Taxonomy Extension Schema Document

        100.CAL XBRL Taxonomy Extension Calculation Linkbase Document