FILED PURSUANT TO RULE 424(b)(3) AND (c)
FILE NUMBER 333-61413
THIRTEENTH PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED AUGUST 24, 1998
4,185,124 SHARES
LYCOS, INC.
COMMON STOCK
This Thirteenth Prospectus Supplement (the "Thirteenth 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 Prospectus
Supplement"), the Eleventh Prospectus Supplement dated January 14, 1999 (the
"Eleventh Prospectus") and the Twelfth Prospectus Supplement dated February 12,
1999 (the "Twelfth 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 and the Twelfth Prospectus Supplement are hereby supplemented to
reflect the gift made by Edward Shelton to Tamara Sophia Shelton in the amount
of 4,880 shares after the date of the Prospectus, the First Prospectus
<PAGE>
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 and the Twelfth Prospectus Supplement. This
Thirteenth 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 and the
Twelfth 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 and the Twelfth
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 and the Twelfth Prospectus.
Capitalized terms used in this Thirteenth Prospectus Supplement and not
otherwise defined herein have the meanings specified in the Prospectus.
<PAGE>
THE DATE OF THIS THIRTEENTH PROSPECTUS SUPPLEMENT IS MARCH 2, 1999
SELLING STOCKHOLDERS
On February 4, 1999, four thousand eight hundred eighty (4,880) of the
Shares beneficially owned by Edward Shelton reflected in the Prospectus and the
supplements thereto were gifted to Tamara Sophia Shelton. 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.
