Prospectus Supplement filed under Rule 424(b)(3)
Registration No. 333-84573
Prospectus Supplement
Dated September 20, 1999
The Prospectus dated August 13, 1999 relating to the offer for resale of up
to $361,000,000 aggregate principal amount of The Interpublic Group of
Companies, Inc.'s 1.87% Convertible Subordinated Notes due 2006, and such shares
of common stock as may be issued upon conversion of the notes, is hereby
supplemented to include the following information in the "Selling
Securityholders" table in the Prospectus Supplement dated August 13, 1999:
Principal Amount
of Registered
Selling Securityholders Notes
- ----------------------------------------------------------- ----------------
CMAC Convertible Portfolio ................................ $150,000
Elf Aquitaine ............................................. 75,000
Excellent Health Plan, Inc. ............................... 500,000
IL Annuity & Insurance Co. - Lord Abbett & Co.............. 4,275,000
Lord Abbett & Co., Oxford Fund ............................ 300,000
RGA Reinsurance Trust ..................................... 2,500,000
University of South Florida ............................... 150,000
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Total of Above........................................ $7,950,000
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