Exhibit 4.1 FOURTH SUPPLEMENTAL INDENTURE This FOURTH SUPPLEMENTAL INDENTURE (the "Supplemental Indenture") dated as of June 30, 2006 among OMNICOM GROUP INC., a New York corporation (the "Company"), OMNICOM CAPITAL INC., a Connecticut corporation...Supplemental Indenture • July 7th, 2006 • Omnicom Group Inc • Services-advertising agencies • New York
