FILED PURSUANT TO RULE 424(b)(3) AND (c)
FILE NUMBER 333-61413
FIFTEENTH PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED AUGUST 24, 1998
4,185,124 SHARES
LYCOS, INC.
COMMON STOCK
This Fifteenth Prospectus Supplement (the "Fifteenth Prospectus
Supplement") supplements the Prospectus dated August 24, 1998 (the
"Prospectus"), the Prospectus Supplement dated September 15, 1998 (the "First
Prospectus Supplement"), the Second Prospectus Supplement dated October 28, 1998
(the "Second Prospectus Supplement"), the Third Prospectus Supplement dated
November 12, 1998 (the "Third Prospectus Supplement"), the Fourth Prospectus
Supplement dated November 18, 1998 (the "Fourth Prospectus Supplement"), the
Fifth Prospectus Supplement dated November 19, 1998 (the "Fifth Prospectus
Supplement"), the Sixth Prospectus Supplement dated December 1, 1998 (the "Sixth
Prospectus Supplement"), the Seventh Prospectus Supplement dated December 2,
1998 (the "Seventh Prospectus Supplement"), the Eighth Prospectus Supplement
dated December 4, 1998 (the "Eighth Prospectus Supplement"), the Ninth
Supplement dated December 21, 1998 (the "Ninth Prospectus Supplement"), the
Tenth Prospectus Supplement dated December 28, 1998 (the "Tenth Prospectu
Supplement"), the Eleventh Prospectus Supplement dated January 14, 1999 (the
"Eleventh Prospectus"), the Twelfth Prospectus Supplement dated February 12,
1999 (the "Twelfth Prospectus Supplement"), the Thirteenth Prospectus Supplement
dated March 2, 1999 (the "Thirteenth Prospectus Supplement") and the Fourteenth
Prospectus Supplement dated March 25, 1999 (the "Fourteenth Prospectus
Supplement") of Lycos, Inc.("Lycos" or the "Company") relating to the public
offering, which is not being underwritten, and sale of up to 4,185,124 shares of
Common Stock, par value $0.01 per share (the "Shares") of the Company, which may
be offered and sold from time to time by certain stockholders of the Company or
by pledgees, donees, transferees or other successors in interest that receive
such shares as a gift, partnership distribution or other non-sale related
transfer (the "Selling Stockholders"). The Company will receive no part of the
proceeds of such sales. The Shares were originally issued or reserved for
issuance by the Company in connection with the Company's acquisition of
WhoWhere? Inc., a California corporation, by and through a merger of a
wholly-owned subsidiary of Lycos, What Acquisition Corp., with and into
WhoWhere? Inc. (the "Acquisition"). The "Selling Stockholders" Section of the
Prospectus, the First Prospectus Supplement, the Second Prospectus Supplement,
the Third Prospectus Supplement, the Fourth Prospectus Supplement, the Fifth
Prospectus Supplement, the Sixth Prospectus Supplement, the Seventh Prospectus
Supplement, the Eighth Prospectus Supplement, the Ninth Prospectus Supplement,
the Tenth Prospectus Supplement, the Eleventh Prospectus Supplement, the Twelfth
Prospectus Supplement, the Thirteenth Prospectus Supplement and the Fourteeth
Prospectus Supplement are hereby supplemented to reflect the gift made by Abby
O'Neill to The Philanthropic Collaborative in the amount of 3,000 shares
<PAGE>
after the date of the Prospectus, the First Prospectus Supplement, the Second
Prospectus Supplement, the Third Prospectus Supplement, the Fourth Prospectus
Supplement, the Fifth Prospectus Supplement, the Sixth Prospectus Supplement,
the Seventh Prospectus Supplement, the Eighth Prospectus Supplement, the Ninth
Prospectus Supplement, the Tenth Prospectus Supplement, the Eleventh Prospectus
Supplement, the Twelfth Prospectus Supplement, the Thirteenth Prospectus
Supplement and the Fourteenth Prospectus Supplement. This Fifteenth Prospectus
Supplement should be read in conjunction with the Prospectus, the First
Prospectus Supplement, the Second Prospectus Supplement, the Third Prospectus
Supplement, the Fourth Prospectus Supplement, the Fifth Prospectus Supplement,
the Sixth Prospectus Supplement, the Seventh Prospectus Supplement, the Eighth
Prospectus Supplement, the Ninth Prospectus Supplement, the Tenth Prospectus
Supplement, the Eleventh Prospectus Supplement, the Twelfth Prospectus
Supplement, the Thirteenth Prospectus Supplement and the Fourteenth Prospectus
Supplement, and is qualified by reference to the Prospectus, the First
Prospectus Supplement, the Second Prospectus Supplement, the Third Prospectus
Supplement, the Fourth Prospectus Supplement, the Fifth Prospectus Supplement,
the Sixth Prospectus Supplement, the Seventh Prospectus Supplement, the Eighth
Prospectus Supplement, the Ninth Prospectus Supplement, the Tenth Prospectus
Supplement, the Eleventh Prospectus Supplement, the Twelfth Prospectus
Supplement, the Thirteenth Prospectus Supplement and the Fourteenth Prospectus
Supplement, except to the extent that the information herein contained
supersedes the information contained in the Prospectus, the First Prospectus
Supplement, the Second Prospectus Supplement, the Third Prospectus Supplement,
the Fourth Prospectus Supplement, the Fifth Prospectus Supplement, the Sixth
Prospectus Supplement, the Seventh Prospectus Supplement, the Eighth Prospectus
Supplement, the Ninth Prospectus Supplement, the Tenth Prospectus Supplement,
the Eleventh Prospectus Supplement, the Twelfth Prospectus, the Thirteenth
Prospectus Supplement and the Fourteenth Prospectus Supplement. Capitalized
terms used in this Fifteenth Prospectus Supplement and not otherwise defined
herein have the meanings specified in the Prospectus.
<PAGE>
THE DATE OF THIS FIFTEENTH PROSPECTUS SUPPLEMENT IS APRIL 27, 1999
SELLING STOCKHOLDERS
On April 23, 1999, three thousand (3,000) of the Shares beneficially
owned by Abby O'Neill reflected in the Prospectus and the supplements thereto
were gifted to The Philanthropic Collaborative. The table of Selling
Stockholders in the Prospectus and the supplements thereto are hereby amended
to reflect such gift and supplemented to specifically include Shares received in
such gift.
