Prospectus Supplement filed under Rule 424(b)(3)
Registration No. 333-84573
Prospectus Supplement
Dated January 21, 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 Warburg Dillon Read LLC is increased from $570,000 to $820,000.
The "Selling Securityholders" table in the Prospectus, as
supplemented, is amended so that the principal amount of registered notes
held by Donaldson, Lufkin & Jenrette Securities Corp. is increased from
$1,000,000 to $4,000,000.
The "Selling Securityholders" table in the Prospectus, as
supplemented, is amended so that the principal amount of registered notes
held by The Travelers Indemnity Company is reduced from $3,360,000 to $0.
The "Selling Securityholders" table in the Prospectus, as
supplemented, is amended so that the principal amount of registered notes
held by The Travelers Insurance Company is reduced from $2,146,000 to $0.
The "Selling Securityholders" table in the Prospectus, as
supplemented, is amended so that the principal amount of registered notes
held by The Travelers Insurance Company Separate Account TLAC is reduced
from $252,000 to $0.
The "Selling Securityholders" table in the Prospectus, as
supplemented, is amended so that the principal amount of registered notes
held by The Travelers Series Managed Assets Trust is reduced from $121,000
to $0.
The "Selling Securityholders" table in the Prospectus, as
supplemented, is amended so that the principal amount of registered notes
held by The Travelers Series Trust Convertible Bond Portfolio is reduced
from $121,000 to $0.
