Prospectus Supplement filed under Rule 424(b)(3)
Registration No. 333-84573
Prospectus Supplement
Dated March 3, 2000
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:
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by OCM Convertible
Trust is reduced from $2,100,000 to $0.
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by OCM Convertible
Limited Partnership is reduced from $100,000 to $25,000.
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by Delta Airlines
Master Trust is reduced from $5,380,000 to $4,045,000. The related footnote is
amended to read: "Calamos(R) Asset Management, Inc. manages $4,045,000 of the
notes beneficially owned by Delta Airlines Master Trust, and Oaktree Capital
Management, LLC manages $0 of the notes beneficially owned by Delta Airlines
Master Trust."
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by State
Employees' Retirement Fund of the State of Delaware is reduced from $1,340,000
to $0.
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by Partner
Reinsurance Company, Ltd. is reduced from $405,000 to $0.
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by Chrysler
Corporation Master Retirement Trust is reduced from $3,835,000 to $0.
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by Motion Picture
Industry Health Plan--Active Member Fund is reduced from $465,000 to $0.
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by Motion Picture
Industry Health Plan--Retiree Member Fund is reduced from $235,000 to $0.
The "Selling Securityholders" table in the Prospectus, as supplemented, is
amended so that the principal amount of registered notes held by Vanguard
Convertible Securities Fund, Inc. is reduced from $2,815,000 to $1,585,000.
