LYCOS INC
S-3, 2000-03-15
COMPUTER PROGRAMMING, DATA PROCESSING, ETC.
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<PAGE>

    As filed with the Securities and Exchange Commission on March 15, 2000.
                                                     Registration No. 333-
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549

                                --------------
                                   FORM S-3
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933

                                --------------
                                  LYCOS, INC.
            (Exact name of registrant as specified in its charter)

                                --------------
              Delaware                            04-3277338
   (State or other Jurisdiction of      (I.R.S Employer Identification
   Incorporation or Organization)                   Number)

                            400-2 TOTTEN POND ROAD
                         WALTHAM, MASSACHUSETTS 02451
                                (781) 370-2700
              (Address, including zip code, and telephone number,
       including area code, of registrant's principal executive offices)

                                --------------
                                ROBERT J. DAVIS
                                  LYCOS, INC.
                            400-2 TOTTEN POND ROAD
                         WALTHAM, MASSACHUSETTS 02451
                                (781) 370-2700
           (Name, address, including zip code, and telephone number,
                  including area code, of agent for service)

                                --------------
                                   COPY TO:
                            KENNETH J. GORDON, ESQ.
                        TESTA, HURWITZ & THIBEAULT, LLP
                                125 High Street
                               Boston, MA 02110
                                (617) 248-7000

                                --------------
   Approximate date of commencement of proposed sale to the public: From time
to time after the effective date of this Registration Statement.
   If the only securities being registered on this form are being offered
pursuant to dividend or interest reinvestment plans, please check the
following box. [ ]
   If any of the securities being registered on this form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, other than securities offered only in connection with dividend or
interest investment plans, check the following box. [X]
   If this form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]
   If this form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]
   If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box.  [ ]

                        CALCULATION OF REGISTRATION FEE
<TABLE>
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- ----------------------------------------------------------------------------------------
<CAPTION>
                                                         Proposed
                                                         Maximum   Proposed
                                                         Offering  Maximum
                                                          Price   Aggregate   Amount of
  Title of Each Class of Securities to be   Amount to be    Per    Offering Registration
                Registered                   Registered  Share(1)  Price(1)     Fee(2)
- ----------------------------------------------------------------------------------------
<S>                                         <C>          <C>      <C>        <C>
Common Stock, par value .01 per share.....    564,045     $71.81  40,504,072   $10,694
- ----------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------
</TABLE>
(1)  Estimated solely for the purpose of computing the registration fee, based
     upon the average of the high and low prices of the Lycos' common stock as
     reported on The Nasdaq National Market on March 8, 2000 in accordance
     with Rule 457 under the Securities Act of 1933. The registration fee of
     $10,694 was paid on March 15, 2000 in connection with the initial filing
     of the Registration Statement on Form S-3.

                                --------------
   The Registrant hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the Registrant
shall file a further amendment which specifically states that this
Registration Statement shall thereafter become effective in accordance with
Section 8(a) of the Securities Act of 1933, as amended, or until the
Registration Statement shall become effective on such date as the Commission,
acting pursuant to said Section 8(a), may determine.
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+The information in this prospectus is not complete and may be changed. We may +
+not sell these securities until the registration statement filed with the     +
+Securities and Exchange Commission is effective. The prospectus is not an     +
+offer to sell these securities and it is not soliciting an offer to buy these +
+securities in any state where the offer or sale is not permitted.             +
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

PROSPECTUS                           SUBJECT TO COMPLETION, DATED MARCH   , 2000

                                 564,045 Shares

                                  LYCOS, INC.

                                  Common Stock

  This prospectus relates to the public offering, which is not being
underwritten, of up to 564,045 shares of common stock, par value $0.01 per
share, of Lycos, Inc., which may be offered from time to time by stockholders
of Lycos or by donees, transferees or other successors in interest that receive
Lycos' shares as a gift or other non-sale related transfer. Lycos will receive
no part of the proceeds of such sales. All of the shares of Lycos common stock
described above were issued by Lycos in consideration of Lycos' acquisition of
all of the outstanding common stock, Series A preferred stock and Series B
preferred stock of Valent Software Corporation ("Valent"), a Delaware
corporation. See "Selling Stockholders" for further information. The 564,045
shares were issued pursuant to an exemption from the registration requirements
of the Securities Act of 1933, as amended.

  These shares may be offered by stockholders of Lycos from time to time in one
or more transactions as described under the "Plan of Distribution". To the
extent required, the number of shares to be sold, the name of any selling
stockholder(s), the purchase price, the name of any agent or broker-dealer and
any applicable commissions, discounts or other items constituting compensation
to such agent or broker-dealer with respect to a particular offering will be
set forth in a supplement or supplements to this prospectus. The aggregate
proceeds to any selling stockholder(s) from the sale of the shares offered from
time to time will be the purchase price of the shares sold less commissions,
discounts and other compensation, if any, paid by such selling stockholder(s)
to any agent or broker-dealer. The price at which any of the shares may be
sold, and the commissions, if any paid, in connection with any sale, are
unknown and may vary from transaction to transaction. Lycos will pay all
expenses incident to the offering and sale of the shares to the public other
than any commissions and discounts of underwriters, dealers or agents and any
transfer taxes. See "Selling Stockholders" and "Plan of Distribution."

  Lycos' common stock is listed on The Nasdaq National Market under the symbol
"LCOS." On March 14, 2000, the last sale price of Lycos' common stock was
$72.69 per share.

                                  -----------

                 THIS OFFERING INVOLVES A HIGH DEGREE OF RISK.
              FOR MORE INFORMATION, SEE "RISK FACTORS" ON PAGE 6.

                                  -----------

  The Securities and Exchange Commission may take the view that, under certain
circumstances, Lycos' stockholders and any broker-dealers or agents that
participate with such stockholders in the distribution of these registered
shares may be deemed to be "underwriters" within the meaning of the Securities
Act of 1933. Commissions, discounts or concessions received by any such broker-
dealer or agent may be deemed to be underwriting commissions under the
Securities Act of 1933.

  NEITHER THE SEC NOR ANY STATE SECURITIES COMMISSION HAS APPROVED THESE
SECURITIES OR DETERMINED THAT THIS PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY
REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.

                                  -----------
<PAGE>

                 The date of this prospectus is March   , 2000.

                      WHERE YOU CAN FIND MORE INFORMATION

   Lycos files annual, quarterly and special reports, proxy statements and
other information with the SEC. You may read and copy any reports, statements
or other information Lycos files at the SEC's public reference rooms in
Washington, D.C., New York, New York and Chicago, Illinois. Please call the SEC
at 1-800-SEC-0330 for further information on the public reference rooms. Lycos'
SEC filings are also available to the public from commercial document retrieval
services and at the Website maintained by the SEC at www.sec.gov. Lycos has
filed a registration statement to register with the SEC the Lycos common stock
listed in this prospectus. This prospectus is part of that registration
statement. As allowed by SEC rules, this prospectus does not contain all of the
information you can find in the registration statement or the exhibits to the
registration statement.

   Some of the important business and financial information that you may want
to consider is not included in this prospectus, but rather is "incorporated by
reference" to documents that have been filed by Lycos with the SEC. The
information that is incorporated by reference consists of:

  .  Lycos' Annual Report on Form 10-K, for the fiscal year ended July 31,
     1999, as filed on October 29, 1999;

  .  Lycos' Quarterly Report on Form 10-Q, for the quarter ended October 31,
     1999, as filed on December 15, 1999;

  .  Lycos' Current Reports on Form 8-K filed on August 6, 1999 (as amended
     on October 7, 1999), September 16, 1999 and December 21, 1999 (as
     amended on December 22, 1999 and January 4, 2000);

  .  The audited consolidated balance sheets of Wired Ventures, Inc. and
     subsidiaries as of December 31, 1998 and 1997 and the related
     consolidated statements of operations and comprehensive income (loss),
     minority interest and stockholders' (deficit) equity and cash flows for
     each of the years in the three-year period ended December 31, 1998; the
     unaudited consolidated balance sheet of Wired Ventures, Inc. and
     subsidiaries as of March 31, 1999 and the related unaudited consolidated
     statements of operations and comprehensive income and cash flows for the
     three months ended March 31, 1999 and 1998; and our unaudited pro forma
     combined condensed balance sheet and the related unaudited pro forma
     combined condensed statements of operations, each as included in our
     Current Report on Form 8-K filed on July 15, 1999;

  .  The description of Lycos' common stock contained in its registration
     statement on Form 8-A, filed with the SEC on February 23, 1996;

  .  All documents filed by Lycos under the Securities Exchange Act of 1934
     (e.g., Forms 10-Q and 8-K) after the date of this prospectus and prior
     to the termination of this offering.

   If there is any contrary information in a previously filed document that is
incorporated by reference, then you should rely on the information in this
prospectus.

   If you are a stockholder, you can obtain any of the documents incorporated
by reference through Lycos or the SEC. Documents incorporated by reference are
available from Lycos without charge, excluding all exhibits. You may obtain
documents incorporated by reference in this prospectus by requesting them in
writing to the following address or by telephone:

                                  Lycos, Inc.
                         Attention: Investor Relations
                             400-2 Totten Pond Road
                          Waltham, Massachusetts 02451
                                 (781) 370-2700

                                       2
<PAGE>

                                  THE COMPANY

   Lycos is a global media company operating one of the Internet's leading
networks of separately branded websites. The Lycos Network is one of the most
visited online destinations in the world, attracting nearly one of every two
U.S. Internet users in November 1999. According to a Media Metrix report, the
Lycos Network of branded websites included four of the 20 most popular U.S.
sites on the Internet, and had over 29 million unique users in November 1999.
The Lycos Network enables users to quickly access and retrieve information,
communicate with other Internet users, easily establish online communities and
engage in commerce. Our popular websites provide a broad offering of integrated
content and services, attracting users into the Lycos Network through multiple
points of entry and creating a large and diverse audience. While users
typically access the Lycos Network for specific content through one of our
branded sites, they are encouraged to remain in the Lycos Network by the
breadth of our product offerings, and the easy navigation possible amongst our
sites.

   We derive our revenues primarily from online advertising and e-commerce.
Demand for online advertising is expected to grow significantly in the future.
According to Forester Research, the market for online advertising is expected
to grow from $3.3 billion in 1999 to $33.1 billion by 2004. We believe that we
are well positioned to serve this market as the Lycos Network provides
advertisers a large and diverse audience and the ability to segment and target
that audience. The wide variety of content and services available on the Lycos
Network enables advertisers to focus their promotional efforts on the Lycos
Network sites most relevant to their product or service offerings. The Lycos
Network has attracted a wide variety of advertisers, including Dell, Intel,
Motorola, Johnson & Johnson, Macy's, OfficeMax and Sears.

   The electronic commerce, or e-commerce, market is also projected to
experience significant growth. International Data Corporation projects that e-
commerce revenues will grow from $50.4 billion in 1998 to $1.3 trillion by
2003. We generate e-commerce revenue through two principal means. We integrate
product and service offerings from merchant partners directly into our search,
directory and community offerings on a topical basis. In addition, in October
1999, we launched our online marketplace, LYCOShop, providing users with a
seamless e-commerce experience that incorporates products from over 2,000
retailers, as well as classified advertising and auctions.

   We expect that international users will become a substantial part of the
Internet user base in the future. According to International Data Corporation,
Web users outside the U.S. will increase from 79.4 million in 1998 to 325.5
million in 2003. We have broadened our offerings outside of the U.S. by
expanding into Latin America and by partnering with local media and technology
companies in Asia and Europe. We currently offer country-specific versions of
our Lycos search and navigation service and other selected network services in
Argentina, Belgium, Brazil, Chile, Denmark, France, Germany, Ireland, Italy,
Japan, Mexico, The Netherlands, Norway, Peru, Singapore, South Korea, Spain,
Sweden, Switzerland, the United Kingdom and Venezuela.

Our Strategy

   Our goal is to be the most visited and utilized global online destination.
The essential elements of our strategy are to:

  .  expand the reach of the Lycos Network;

  .  increase the frequency and duration of user visits to the Lycos Network;

  .  continue to provide comprehensive advertising solutions;

  .  provide a compelling e-commerce platform; and

  .  expand the global presence of the Lycos Network.

                                       3
<PAGE>

Recent Developments

   As part of our strategy to continue to expand our product and service
offerings and audience reach, in December 1999, we completed the acquisitions
of Quote.com and Gamesville.com.

  .  Quote.com is a leading online provider of financial content and tools to
     independent investors, including stock quotes, news and research
     information. With this acquisition, Lycos advanced its presence in the
     online financial industry, bringing an added dimension to the Lycos user
     experience and a new branded point of entry into the Lycos Network.

  .  Gamesville.com is a leading online gaming site that is now the featured
     product offering on the Lycos Games WebGuide. Gamesville.com's approach
     to interactive gaming allows thousands of registered contestants to
     compete for cash and other prizes in live card games, trivia quizzes and
     other traditional games such as bingo. According to Media Metrix, in
     November 1999, the Gamesville.com site ranked third among the top 500
     U.S. websites based on average duration per visit of approximately 15
     minutes.

   In February 2000, we entered into a joint venture agreement with Bell Canada
to create a new Internet company, Sympatico-Lycos, to provide expanded Internet
resources for the business-to-consumer marketplace in Canada. As part of the
agreement, Bell Canada will invest $25 million to form the new company, which
will be majority owned by Bell Canada; Bell Canada has commitments to make
additional investments of $20 million, based on Sympatico-Lycos' working
capital needs. Bell Canada will also contribute a portfolio of business-to-
consumer Internet properties to Sympatico-Lycos. We will license to Sympatico-
Lycos applications such as the My Lycos customizable start page, free e-mail,
chat, shopping, homepage building and personalized news. The closing of the
joint venture is subject to completion of certain conditions, including certain
regulatory and other approvals. Separately, Bell ActiMedia and Lycos signed a
$40 million multi-year distribution agreement, under the terms of which Bell
products and services will be promoted to U.S. Lycos Network users accessing
the Network from Canada.

   We were incorporated in Delaware in June 1995. Our principal executive
offices are located at 400-2 Totten Pond Road, Waltham, Massachusetts 02451,
and our telephone number is (781) 370-2700. We maintain a site on the Web at
www.lycos.com; however, the information found on our website is not part of
this prospectus.

                                       4
<PAGE>

                                  RISK FACTORS

   The following risk factors should be considered in conjunction with the
other information included and incorporated by reference in this prospectus
before purchasing our common stock.

Our limited operating history makes it difficult to predict our performance.

   We have a limited operating history for you to use in evaluating our
prospects. We generated revenues of $56.1 million for the fiscal year ended
July 31, 1998 and revenues of $135.5 million for the fiscal year ended July 31,
1999. We generated revenues of $56.0 million for the fiscal quarter ended
October 31, 1999. Due to our limited operating history, you should not take the
recent revenue growth as indicative of the rate of revenue growth, if any, that
you can expect in the future. You should consider the risks, expenses and
difficulties frequently encountered by companies in their early stages of
development, particularly companies operating in new and rapidly evolving
markets, such as ourselves. We may not successfully address these risks, which
include:

  .  the ability to continue to develop and extend the Lycos brand;

  .  the ability to maintain and increase levels of traffic on our websites;

  .  the ability to maintain a premier position on the America
     Online/Netscape Web browser or to enter into additional distribution
     relationships and strategic alliances;

  .  the ability to continue to develop or acquire content, features and
     functionality for our services;

  .  the development of equal or superior services or products by
     competitors;

  .  the failure of the market to adopt the Internet as an advertising or
     commercial medium;

  .  the reduction in market prices for Internet-based advertising as a
     result of competition or otherwise;

  .  the ability to effectively generate commerce-related revenues through
     sponsored services and placements in our services; and

  .  the success in attracting, retaining and motivating qualified personnel.

   As a strategic response to a changing competitive environment, we may choose
to make pricing, service or marketing decisions or acquisitions that would
adversely impact our operations and therefore increase our losses. Due to the
nascent nature of the Internet industry, we believe that period-to-period
comparisons of our operating results are not meaningful and that you should not
rely upon them as an indication of our future performance.

We have a history of significant losses.

   We have incurred significant losses since our inception and may incur losses
in the future. As of October 31, 1999, we had an accumulated deficit of $119.8
million. We reported a loss of $0.46 per share for the year ended July 31, 1998
and a loss of $0.60 per share for the year ended July 31, 1999. We reported a
loss per share of $0.29 for the fiscal quarter ended October 31, 1999. We
currently expect that our operating expenses will continue to increase
significantly as our sales and marketing operations are expanded and as we fund
further product development and acquire complementary products and
technologies. Our potential inability to keep short-term expense levels in line
with revenues could adversely affect our financial results for any given
quarter. It is possible that in some future quarter our operating results may
be below the expectations of analysts and investors which could reduce the
price of our common stock.

                                       5
<PAGE>

Our operating results can be affected by seasonality.

   We have experienced, and expect to continue to experience, seasonality in
our business. Historically, users have made a smaller number of visits to our
websites and the websites of our partners during the summer and the year-end
vacation periods.

Our stock price is volatile and is affected by factors relating to the Internet
industry.

   The price of our common stock has been and may continue to be subject to
wide fluctuations in response to any of the following events:

  .  quarterly variations in our results of operations;

  .  announcements of new technological innovations or new products and media
     properties by us or our competitors;

  .  changes in financial estimates and recommendations by securities
     analysts;

  .  the operating and stock price performance of other companies that
     investors may deem comparable to us; and

  .  news relating to trends in our markets.

   Also, the stock market in general, and the market prices for Internet-
related companies in particular, have experienced extreme volatility that often
has been unrelated to the operating performance of these companies. These broad
market and industry fluctuations may adversely affect the price of our common
stock, regardless of our operating performance. Additionally, fluctuations in
the market price of our common stock could result in stockholder lawsuits,
which potentially could impair our business.

We may not be able to maintain advertising revenues if the Internet is not
adopted as an advertising medium.

   We earn a significant portion of our revenues by selling advertisements on
our Web pages. For the fiscal year ended July 31, 1999, advertising revenues
represented approximately 69% of our total revenues and for the fiscal quarter
ended October 31, 1999, advertising revenues represented approximately 70% of
our total revenues. We will not be able to sustain or increase our advertising
revenues if the Internet does not develop into an attractive and sustainable
advertising medium. For example, Internet users may purchase "filter" software
programs that limit or remove advertising from the user's desktop. The
widespread adoption of this software by users could negatively impact the use
of advertising on the Web. It is also difficult to predict which method of
pricing will be adopted by the industry or advertisers. For example, our
advertising revenues could decrease if advertising rates are based on the
number of users who access the advertiser's website from one of our network
websites or seek additional information about a product or service by
"clicking" on the advertisement, rather than rates being based solely on the
number of times an advertisement is displayed. Our strategy is to continue to
develop advertising and other methods of generating revenues through the use of
our products and services. In order to maintain and increase advertising
revenues, we must develop a large base of users of our products and services
with demographic characteristics attractive to advertisers. Additionally, we
may be required to expand our advertising sales force, which would increase our
costs.

We may not be able to deliver or measure the delivery of advertisements
reliably.

   The process of reliably delivering and tracking advertising placement within
large, high-traffic websites such as ours is an increasingly important and
complex task, and currently available software programs and other tracking
methods are rapidly evolving. We license an advertising management system from
a third party. To the extent that we encounter system failures or material
difficulties in the operation of this system, we could be unable to deliver
banner advertisements and sponsorships through our websites. Any extended
failure of, or other material difficulties with, our advertising management
system may require us to provide free advertising

                                       6
<PAGE>

to our customers. In addition, advertising clients may not advertise on our
websites or may pay less for advertising if they do not perceive our
measurements to be accurate or reliable.

We may incur costs in connection with our arrangements with advertisers and
sponsors.

   We sell advertising space on our websites and allow third-parties to provide
sponsored services and placements on our websites under agreements with
advertisers and sponsors which expose us to potentially significant financial
risks. In connection with these arrangements, we provide, and sometimes
guarantee, a minimum number of times that an advertisement is displayed or a
minimum number of user requests for additional information made by clicking on
the advertisement or promotional hyperlink. We may receive sponsorship fees as
well as a portion of transaction revenues received by these third-party
sponsors from users originated through our websites. These sponsorship
arrangements expose us to potentially significant financial risks, including
the risk that we may fail to deliver the required number of advertisement
displays or user requests for additional information. If we fail to deliver
these minimums, the fees payable to us may decline or we may be required to
provide sponsorship services to the sponsor for free for a limited "make good"
period.

   Our contracts with advertisers and sponsors typically have short terms and
are terminable on relatively short notice. Third-party sponsors may decide not
to renew the sponsorship agreements upon expiration. Some of these arrangements
also require us to integrate sponsors' content with our services. We must
dedicate resources and significant programming and design efforts to accomplish
this integration. We may not be able to attract additional sponsors or renew
existing sponsorship agreements when they terminate. In addition, we have
granted exclusivity provisions to some of our sponsors, and may in the future
grant additional exclusivity provisions. These exclusivity provisions may
prevent us for the duration of these exclusivity agreements from accepting
advertising or sponsorship agreements within a particular subject matter on our
websites or across our entire service network.

We depend on third-party relationships for distribution and content of our
websites.

   We depend on a number of third-party relationships to attract users to our
websites and consequently to generate revenues. We require those third-parties
to provide users with access to our products and services. If we are unable to
attract users to our websites, advertising revenues could be impaired,
advertisers and sponsors may terminate their agreements with us, advertisers
may not be willing to pay as much as they currently pay to appear on the Lycos
Network and we may be required to supply our services under agreements with
advertisers for free.

 Browser services provided by AOL/Netscape.

   We depend on our arrangement with AOL/Netscape relating to the positioning
of our products and services on the Netscape Web browser to create traffic on
our websites and consequently to generate revenues. If AOL/Netscape or any
other Web browser grants an exclusive arrangement for positioning on its Web
browser to our competitors, then our business may be impaired. In addition,
users have experienced difficulties due to browser failures unrelated to our
systems, products and services.

   Although our agreements with AOL/Netscape may be terminated only under
particular circumstances, if we are unable to continue as a preferred provider
for AOL/Netscape, our websites could lose a material portion of our users, the
level of use on competing services could substantially increase and our
websites could become less attractive to advertisers, reducing our revenues.

 Other third-party relationships.

   We depend on website operators that provide links to our websites or
otherwise use our services to create traffic on these websites. We license some
technology and related databases from third parties, including search,
telephone directories, chat, street mapping and other similar services. We
believe that many of our third party relationships are important to our ability
to attract traffic and advertisers. Any errors, failures or delays

                                       7
<PAGE>

experienced in connection with these third party technologies and information
services could alienate our users and adversely affect our brand and our
business. Although we view these relationships as important, most of our
arrangements do not include minimum commitments to use our services or to
provide access or links to Lycos' products or services in the future, are not
exclusive and generally have a term of only one to three years. In addition,
our partners may not regard their relationship with us to be as important to
their own respective businesses and operations. Our partners may reassess their
commitment to our products or services at any time in the future, or may
develop their own competitive products or services. The failure of one or more
of our partnering relationships to achieve or maintain market acceptance or
commercial success, or the termination of one or more successful collaborative
relationships, could adversely impact our ability to conduct our business.

 Content.

   We rely on content developed by third parties. We believe that third party
content is an important element in attracting users to our websites. Failure of
these third party content providers to develop and maintain high quality
products and services or our inability to enter into agreements allowing our
users to access this content could impair our ability to attract users and
advertisers.

We face risks relating to our customers' liquidity.

   The Internet as a commercial endeavor has been in existence for a relatively
short period of time. The costs of establishing a website are low, and new
online service providers, content providers and advertisers are launched
regularly. Many of our advertisers and electronic commerce sponsors were funded
with venture capital and other forms of financing before they proved to be
successful. Those companies that are unable to prove themselves successful
before they have spent their initial funding may find it difficult or
impossible to secure additional funding and, therefore, difficult to pay
amounts due to us. Our losses could increase if any of our advertisers or
electronic commerce sponsors fails to pay amounts due on a timely basis.

We compete with a variety of competitors both to attract Internet users to
visit our websites and to attract advertisers and sponsors to place content on
our websites.

   The market for Internet products and services, including those which we
offer to Internet users, is highly competitive. We compete with other providers
both to attract Internet users and to attract advertisers and sponsors. For
example, we compete with search program services that allow a user to search
the databases maintained by us and our competitors simultaneously. We also
compete indirectly with database vendors that offer information search and
retrieval capabilities with their core database products. Our community-based
websites, Tripod and Angelfire.com, compete with other community-based
websites.

   Additional competition may come from a variety of companies that have begun
to offer or have announced their intention to offer services similar to those
currently offered by us. For example, many large media companies have developed
or acquired Internet navigation services and are attempting to become "gateway"
or "portal" sites through which users may access the Internet, similar to the
sites maintained by us and our competitors. These entities may be able to
utilize their substantial financial resources and access to traditional media
outlets to promote their competitive businesses and access a substantial user
base. Additionally, companies with greater financial resources may acquire our
competitors or may enter into joint ventures and/or licensing arrangements
involving our competitors.

   A number of companies offering Internet products and services, including our
direct competitors, recently have begun to integrate multiple features within
their products and services, including search and retrieval features. For
example, the Web browser offered by AOL/Netscape, which is a substantial source
of users for us, may incorporate and promote information search and retrieval
capabilities in future releases or upgrades. This integration of search and
retrieval capabilities could make it more difficult for Internet viewers to
find and to use our products and services.

                                       8
<PAGE>

   We also compete with traditional off-line media, including print and
television, for a share of advertising budgets.

   If our competitors become more successful than us in attracting users, then
our attractiveness to advertisers will be diminished. We believe that the
principal competitive factors in attracting users include:

  .  name recognition;

  .  quality of content and commerce offerings;

  .  site performance;

  .  ease of use;

  .  features; and

  .  quality of support.

   We receive a majority of our revenue from selling advertising space on our
websites and allowing third parties to provide sponsored services and
placements on our websites under sponsorship agreements with us. There is
intense competition based on price in the sale of advertising on the Internet,
and we may not be able to compete successfully against our current or future
competitors.

We may be subject to risks associated with e-commerce.

   We believe that the portion of our business dedicated to e-commerce will
play a significant role in our future financial growth and development. In
order to support our electronic commerce initiative, we must rely on our third
party suppliers. The failure of our third party suppliers to provide quality
service to users of our websites, to deliver to our users on a timely basis the
products purchased on our websites, or to deliver satisfactory products may
result in user dissatisfaction, which may, in turn, cause users to stop
visiting our websites or using our services. In addition, to the extent that we
are an intermediary in electronic commerce transactions, it is possible that
users may involve us in claims associated with the sale of goods, including
claims relating to product liability and consumer protection. In addition, we
may suffer losses as a result of orders placed with fraudulent credit card
data, even though the consumer's payment for these orders has been authorized
by the associated financial institution.

We are uncertain whether our products and services will be accepted by the
market.

   The market for our products and services has only recently begun to develop
and is rapidly evolving. An increasing number of market entrants have
introduced or developed products and services for use on the Internet. Our
market depends on the increased use of the Internet for information publication
and distribution and for commerce. Additionally, this market depends on the
development of the Internet as an advertising medium. Our future operating
results will depend upon:

  .  the growth of Internet advertising and commerce markets;

  .  the successful implementation of our advertising programs; and

  .  our ability to establish electronic commerce and licensing relationships
     and other strategic alliances.

   We cannot assure you that:

  .  the Internet advertising or commerce market will develop as an
     attractive and sustainable medium;

  .  we will achieve or sustain market acceptance of our products and
     services; or

  .  we will be able to execute our business plan successfully.

                                       9
<PAGE>

   As is typical in the case of a new and rapidly evolving industry, demand and
market acceptance for recently introduced products and services are very
uncertain. The Internet industry is young and has few proven products. In
addition, the current Internet infrastructure may not effectively support the
growth, if any, that may occur in the use of the Web. Moreover, critical issues
concerning the commercial use of the Internet (including security, reliability,
cost, ease of use and access, quality of service and acceptance of advertising
and electronic commerce) remain unresolved. These critical issues may impact
the growth of the Internet, the placement of advertisements on the Internet or
the growth of the Internet as a means of electronic commerce.

Our systems may fail to function or may not have adequate capacity, which could
impair our ability to attract advertisers and users.

   The satisfactory performance, reliability and availability of our services
and our network infrastructure are critical to attracting Internet users and
maintaining relationships with business customers and consumers. System
interruptions that result in the unavailability of sites or slower response
times for consumers would reduce the number of advertisements purchased and
reduce the attractiveness of our online services to business customers and
consumers. Any increase in system interruptions or slower response times could
adversely impact our ability to conduct our business. We have experienced
system interruptions in the past, and interruptions are expected to occur from
time to time in the future.

   We are dependent on hardware suppliers for prompt delivery, installation and
service of servers and other equipment and services used to provide our
products and services. Substantially all of our computer systems are located at
the New Jersey, California and Massachusetts sites of Exodus Communications. A
system failure at any of these locations may harm the performance of our
products and services. This system and, as a result, our business, is
vulnerable to damage from fire, floods, earthquakes, power loss,
telecommunications failures, break-ins and similar events.

   Any substantial increase in traffic on the Lycos Network or on any of our
websites will require us to expand and adapt our network infrastructure. Our
inability to add additional software and hardware to accommodate increased
traffic on the Lycos Network or on any of our websites may cause unanticipated
system disruptions and result in slower response times. In addition, we
currently depend on a limited number of suppliers for certain key technologies
used to roll out and manage the Lycos Network. We may not be able to expand our
network infrastructure on a timely basis to meet increased demand and key
technology suppliers may not continue to provide us with products and services
that meet our requirements.

We must be able to adapt to technological change and to develop new products to
remain competitive.

   The market for Internet products and services is characterized by rapidly
changing technology, evolving industry standards and customer demands, and
frequent new product introductions and enhancements. These market
characteristics are exacerbated by the emerging nature of this market and the
fact that many companies are expected to introduce new competitive Internet
products and services in the future. To be successful, we must continually
improve the performance, features and reliability of our products and services.
In addition, a key element of our business strategy is the development,
introduction and integration of new products and services that take advantage
of the increasing use of the Internet. We cannot assure you that we will be
successful in developing or integrating these products or services or that they
will meet with market acceptance. In addition, our new product releases may
contain undetected errors that require significant design modifications,
resulting in a loss of customer confidence in our products and services and,
consequently, viewer support, which will diminish the use of our products and
services.

We face risks associated with brand development.

   We believe that establishing and maintaining the Lycos Network brand is
crucial to the continued expansion and attraction of our Internet audience. We
believe that the importance of brand recognition will

                                       10
<PAGE>

increase in the future due to the growing number of Internet sites. Promotion
and enhancement of the Lycos Network brand will depend largely on our ability
to provide consistently high-quality products and services. The Lycos Network
brand could be impaired if:

  .  we do not provide consistently high-quality products and services;

  .  consumers do not believe that our products and services are of high
     quality;

  .  consumers do not use new products and services which we introduce; or

  .  our new business ventures are not favorably received by consumers.

The acquisitions and investments that we have made and may make in the future
may not be successful and may create unanticipated problems for us.

   We have completed acquisitions of companies, technologies and assets that we
believe complement our business. We may not be able to identify additional
suitable acquisition candidates available for sale at reasonable prices or to
complete any desired acquisitions. In addition, we may not be able to
successfully integrate any or all of the businesses we have recently acquired
into our operations. Future acquisitions could result in potentially dilutive
issuances of equity securities, the incurrence of debt and contingent
liabilities, amortization expenses and write-downs of acquired assets.

   Acquisitions involve numerous additional risks, including difficulties in
the assimilation of the operations, services, products and personnel of the
acquired company. Our systems, procedures or controls may not be able to
support increased operations resulting from acquisitions. Acquisitions also
divert management's attention from other business concerns. We also encounter
risks by entering markets in which we have little or no experience. Problems
with an acquired business could impair our performance. We have, in general,
made investments in companies involved in the development of technologies or
services that we believe are complementary or related to our operations
(including our investment in Fast). We may make investments of this type in the
future. We have invested in companies that are in an early stage of development
and may be expected to incur substantial losses. We cannot assure you that any
investments in these companies will result in any return, nor can we provide
any assurance as to the timing of any return.

We face risks associated with litigation.

   We are subject to several purported class action lawsuits. One of the
complaints allege, among other claims, violations of the United States federal
securities law through alleged misrepresentations relating to our agreement to
enter into an announced and later terminated transaction with USA Networks and
certain affiliated companies. Each complaint seeks an unspecified award of
damages. We are also party to other lawsuits in the ordinary course of our
business. An adverse outcome in, or a decision to settle, these or other
lawsuits could result in significant costs to us. In addition, our senior
management may be required to devote substantial time to these lawsuits which
they could otherwise devote to our business. For a more detailed description of
these lawsuits, see "Business--Legal Proceedings."

We face risks associated with international expansion.

   International sales, primarily from licensing our products and services,
accounted for less than 10% of our revenues for the fiscal year ended July 31,
1999 and the fiscal quarter ended October 31, 1999. As part of our business
strategy, we have entered into joint ventures in Europe, Japan, South Korea and
Asia. We recently launched localized sites in South and Central America.

   We believe international expansion is important to our ability to continue
to grow and to market our products and services. In marketing our products and
services internationally, however, we will face new competitors. In addition,
our ability to enter international markets will be dependent upon our ability
to create localized versions of our products and services. Furthermore, to the
extent our various international operations

                                       11
<PAGE>

are conducted through joint ventures, our success will also depend to a
significant extent on the performance of our joint venture partners who
generally are responsible for day-to-day operations. We cannot assure you that
we will be successful in creating localized versions of our products and
services, marketing or distributing our products abroad, or that, if we are
successful, our international revenues will be adequate to offset the expense
of establishing and maintaining international operations. To date, we have
limited experience in marketing and distributing our products internationally.

   There are difficulties and risks inherent in doing business on an
international level, such as:

  .  compliance with regulatory requirements and changes in those
     requirements;

  .  trade barriers;

  .  uncertainty regarding protection of intellectual property rights;

  .  difficulties in staffing and managing international operations;

  .  longer payment cycles;

  .  problems in collecting accounts receivable;

  .  political instability;

  .  fluctuations in currency exchange rates; and

  .  potentially adverse tax consequences.

If one or more of these factors were to occur, our business and operating
results may suffer.

We are dependent on intellectual property and our methods of protecting our
intellectual property may not be adequate.

   Our success depends significantly upon our proprietary technology. We
currently rely on a combination of patent, copyright and trademark laws, trade
secrets, confidentiality procedures and contractual provisions to protect our
proprietary rights. We generally enter into confidentiality agreements with our
employees, consultants and partners. We have registered and applied for
registration of certain service marks and trademarks, and will continue to
evaluate the registration of additional service marks and trademarks, as
appropriate. In addition, Carnegie Mellon University has licensed a patent
issued in the United States relating to our search and indexing technology to
us on a perpetual basis. Other parties may challenge this patent. If challenges
are brought, the patent may be invalidated. Also, we cannot assure you that we
will develop proprietary products or technologies that are patentable, that any
issued patent will provide us with any competitive advantages or will not be
challenged by third parties, or that the patents of others will not impair our
ability to do business. Despite our efforts to protect our proprietary rights,
unauthorized parties may attempt to copy aspects of our products or services or
to obtain and use information that we regard as proprietary. The laws of some
foreign countries do not protect proprietary rights to as great an extent as do
the laws of the United States. Our means of protecting our proprietary rights
may not be adequate. Additionally, our competitors may independently develop
similar technology, duplicate our products or design around our intellectual
property rights.

We may become involved in intellectual property litigation which could impair
our ability to conduct our business.

   There has been substantial litigation in the computer industry regarding
intellectual property rights. We may become involved in claims and
counterclaims with third parties regarding infringement with respect to current
or future products or trademarks or other proprietary rights. Any infringement
or other claims or counterclaims could impair our business because they could:

  .  be time-consuming;

  .  result in costly litigation;

                                       12
<PAGE>

  .  divert management's attention;

  .  cause product release delays; or

  .  require us to redesign our products or require us to enter into royalty
     or licensing agreements which may not be available on terms acceptable
     to us, or at all.

We are subject to concerns regarding privacy of personal information about
users of our products and services.

   We maintain a privacy policy which is displayed on each of our websites. Our
policy is not to disclose willfully any individually identifiable information
about any user of our products or services to a third party without the user's
consent. This policy and user choices regarding the dissemination of personal
information collected on our websites, which may include personal
identification information, demographic profile data, user preferences and
website behavioral data, are accessible to users of our personalized services
when they initially register. Despite this policy, however, if third persons
were able to penetrate our network security or otherwise misappropriate users'
personal information, we could be subject to liability claims. These could
include claims for unauthorized purchases, impersonation or other similar fraud
claims, as well as claims for other misuses of personal information, for
example for unauthorized marketing purposes. In addition, the Federal Trade
Commission and several states have been investigating some Internet companies
regarding their use of personal information. We could incur additional expenses
if new regulations regarding the use of personal information are introduced, if
our privacy practices are investigated or if our privacy policies are viewed
unfavorably by users or potential users.

We may face potential government regulations and legal uncertainties which may
impair our business.

   We are not currently subject to direct regulation by any government agency,
other than regulations applicable to businesses generally. There are currently
few laws or regulations directly applicable to access to, or commerce on, the
Internet. However, due to the increasing popularity and use of the Internet, it
is possible that a number of laws and regulations may be adopted with respect
to issues such as the protection of databases, user privacy, pricing and
characteristics and quality of products and services. For example, as of April
2000, our LycosZone for Kids website will be subject to federal regulation
regarding child privacy. The adoption of laws or regulations may decrease the
growth of the Internet. This decrease could in turn decrease the demand for our
services and products or increase our costs of doing business. Currently, with
the acquisition of Gamesville.com, we offer Lycos Network users a form of
online interactive gaming which includes various games where users compete
without financial consideration for cash prizes. To the extent these gaming
activities become subject to future regulation, this regulation could
substantially restrict the online gaming activities we offer.

   Due to the global nature of the Internet, it is possible that, although
transmission of our services originates from operations centers in New Jersey,
California and Massachusetts, the governments of other states and foreign
countries may attempt to regulate our transmissions or to prosecute us for
violations of their laws. Violations of local laws may be alleged or charged by
state or foreign governments. We may unintentionally violate these laws and
these laws may be modified, or new laws enacted, in the future. It is also
possible that states or foreign countries may seek to impose sales taxes on
out-of-state companies that engage in commerce over the Internet. In the event
that states or foreign countries succeed in imposing sales or other taxes on
Internet commerce, the growth of the use of the Internet for commerce could
slow substantially.

We may be liable for information retrieved from the Internet.

   Because material may be downloaded from Internet services operated or
facilitated by us and be subsequently distributed to others, it is possible
that claims will be made against us on the basis of defamation, negligence,
copyright or trademark infringement or other theories based on the nature and
content of these

                                       13
<PAGE>

materials. We could be held liable for information contained on the Lycos
Network which we have not generated or compiled. These claims could be based on
us providing access to obscene, lascivious, inaccurate, or indecent
information. Although we carry general liability insurance, our insurance may
not cover potential claims of this type, or may not be adequate to indemnify us
for all types of liability that may be imposed. Any imposition of liability
that is not covered by insurance or is in excess of insurance coverage could
impair our business. In addition, our provision of access to Internet content
or advertisements on the Lycos Network that users may find objectionable could
harm our reputation and reduce the value of our brand.

We may not be able to manage effectively the potential growth of our
businesses.

   Our businesses have grown rapidly in recent periods. The growth of these
businesses has resulted, and, for us, is expected to result in growth in
employee levels, in the establishment of new offices and in increased
responsibility for both existing and new management personnel. In addition,
this growth has and will put additional pressure on existing operational,
financial and management information systems. To the extent we continue to grow
and do not manage this expansion successfully, we may be unsuccessful in
executing our strategy and operating our business.

We are dependent upon key senior management.

   Our success depends to a significant degree upon the contributions of our
executive management team. The loss of the services of members of our executive
management team could adversely impact our business.

We must hire and retain skilled personnel to be successful.

   Our success depends upon our ability to attract and retain highly qualified
management, technical and sales and marketing personnel. The process of
locating and hiring personnel with the combination of skills and attributes
required to carry out our strategy is often lengthy and intensely competitive.
The loss of the services of key personnel or the inability to attract
additional qualified personnel could adversely impact our business.

Our systems may experience difficulties related to Year 2000 computer problems.

   The codes of many currently installed computer systems and software products
accept only two-digit entries in the date code field and cannot distinguish
21st century dates from 20th century dates. Many companies' software and
computer systems, including ours and the companies we depend on, may need to be
upgraded or replaced so that they will be able to distinguish 21st century
dates from 20th century dates in order to comply with Year 2000 requirements
and therefore be Year 2000 compliant. At and since January 1, 2000, Year 2000
problems have not been significant and wide-spread computer failures have not
materialized. Year 2000 problems could still occur after January 1, 2000.

   To the extent that we fail to identify and remedy any non-compliant internal
or external Year 2000 problems, or the Year 2000 phenomenon creates a systemic
failure beyond our control, like a prolonged telecommunications or electrical
failure or a prolonged failure of third-party software on which we rely, we
could be prevented from operating our business and permitting users access to
our websites.

                                       14
<PAGE>

               SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

   This prospectus contains forward-looking statements that involve risks and
uncertainties. These statements relate to future events or our future financial
performance and include statements about our plans, objectives, products and
services as well as our expectations and intentions. In some cases, you can
identify forward-looking statements by terminology such as "may," "will,"
"should," "expects," "plans," "anticipates," "believes," "estimates,"
"predicts," "potential" or "continue" or the negative of such terms or other
comparable terminology. These statements are only predictions and involve known
and unknown risks, uncertainties and other factors, including the risks
outlined under "Risk Factors," that may cause our or our industry's actual
results, levels of activity, performance or achievements to be materially
different from any future results, levels or activity, performance or
achievements expressed or implied by any forward-looking statements.

   Although we believe that the expectations reflected in the forward-looking
statements are reasonable, we cannot guarantee future results, levels of
activity, performance or achievements. We are under no duty to update any of
the forward-looking statements after the date of this prospectus to conform
these statements to actual results.

                                       15
<PAGE>

                                USE OF PROCEEDS

   Lycos will not receive any of the proceeds from the sale of these shares of
common stock. All proceeds from the sale of these shares of common stock will
be for the account of the Selling Stockholders, as described below. See
"Selling Stockholders" and "Plan of Distribution" described below.

                              SELLING STOCKHOLDERS

   The following table sets forth, as of the date of this prospectus, the name
of the Selling Stockholders, the number of shares that the Selling Stockholders
own as of such date, the number of shares owned by the Selling Stockholders
that may be offered for sale from time to time by this prospectus, and the
number of shares to be held by the Selling Stockholders assuming the sale of
all of the shares offered hereby.

<TABLE>
<CAPTION>
                               Shares Beneficially   Shares Beneficially
                                  Owned Prior To      Owned If All Shares
                               Offering And Being      Being Registered
                                 Registered For         Hereunder Are
                                   Sale(1)(2)           Sold(1)(2)(3)
                               --------------------------------------------
Selling Stockholder             Number      Percent   Number      Percent
- -------------------            ----------- -------------------   ----------
<S>                            <C>         <C>       <C>         <C>
Chris Williams...............      103,527      *         0            0
J. Scott Benson..............       94,971      *         0            0
Leigh Turner.................       94,971      *         0            0
Anthony Antonuccio...........       69,645      *         0            0
Rich Levandov................       33,880      *         0            0
Jerry Miller.................       25,325      *         0            0
Alan J. Dworsky..............       18,862      *         0            0
Siegmar Schmidt..............       17,112      *         0            0
Doug Core....................       12,662      *         0            0
Chris Fortier................        9,497      *         0            0
Tom Walker...................        8,555      *         0            0
Edward Lee Perry Rev. Trust..        6,331      *         0            0
Osprey Venture Capital
 Partnership.................        6,331      *         0            0
Walter Burrage...............        6,331      *         0            0
One + Co.....................        6,287      *         0            0
David R. Clark Rev. Trust....        3,798      *         0            0
Jonathan Clark Rev. Trust....        3,798      *         0            0
Kitty Clark Rev. Trust.......        3,798      *         0            0
Jonathan Piper...............        3,798      *         0            0
Greg Erman...................        3,165      *         0            0
Ted Weiss....................        3,165      *         0            0
Helen D. Burrage.............        2,374      *         0            0
Frank Strasburger............        2,330      *         0            0
Alyssa Alden Burrage Min.
 Trust.......................        2,215      *         0            0
Amanda Bancroft Burrage Min.
 Trust.......................        2,215      *         0            0
Christopher Lincoln Burrage
 Min. Trust..................        2,215      *         0            0
Katherine Swan Burrage Min.
 Trust.......................        2,215      *         0            0
Susannah Derby Burrage Min.
 Trust.......................        2,215      *         0            0
Walter Meigs.................        1,899      *         0            0
Patricia Riley...............        1,899      *         0            0
Gabriella Haroutunian........        1,582      *         0            0
Jerome C. Hunsaker...........        1,582      *         0            0
Patricia Riley Rev. Trust....        1,539
Mark Staton..................        1,187      *         0            0
Ann-Marie Sweeney............        1,978      *         0            0
Rich Cohen...................          791      *         0            0
  TOTAL......................      564,045      *         0            0
</TABLE>

                                       16
<PAGE>

- --------
 *  Less than 1.0%.

(1) The number and percentage of shares beneficially owned is determined in
    accordance with Rule 13d-3 of the Securities and Exchange Act of 1934, and
    the information is not necessarily indicative of beneficial ownership for
    any other purpose. Under Rule 13d-3, beneficial ownership includes any
    shares as to which the individual has sole or shared voting power or
    investment power and also any shares which the individual has the right to
    acquire within 60 days of the date of this prospectus through the exercise
    of any stock option or other right.
(2) Includes an aggregate of 112,806 shares of common stock beneficially owned
    by the Selling Stockholders that have been deposited into an escrow account
    pursuant to the Preferred Stock Purchase and Option Agreement dated as of
    December 31, 1998 and amended as of January 3, 2000 by and among Lycos,
    Valent and the other signatories thereto (the "Purchase and Option
    Agreement"), the Agreement and Plan of Merger dated February 2, 2000 by and
    among Lycos, Valent, Valent Acquisition Corp. and the Selling Stockholders
    and the Escrow Agreement dated as of February 2, 2000 by and among Lycos,
    State Street Bank and Trust Company and the representative of the Selling
    Stockholders, to secure indemnity claims pursuant to the Purchase and
    Option Agreement . The escrowed shares will be fully released from the
    escrow on February 3, 2001, to the extent that no claims have been made by
    Lycos against the escrowed shares prior to that date. State Street Bank and
    Trust Company, the escrow agent, may, under certain limited circumstances,
    sell the escrowed shares on or prior to February 2, 2001 for expenses. Also
    includes 97,726 shares beneficially owned by Antonuccio, Miller, Turner and
    Williams pledged to Lycos by those persons pursuant to their employment
    agreements with Lycos to secure their obligations to Lycos under those
    agreements. The pledged shares will be fully released by Lycos on February
    3, 2001, to the extent that no claims have been made against Antonuccio,
    Miller, Turner or Williams by Lycos prior to that date.
(3) Assumes that the Selling Stockholders will sell all the shares set forth
    above under "Shares Beneficially Owned Prior to Offering and Being
    Registered for Sale." There can be no assurance that the Selling
    Stockholders will sell all or any of the shares offered hereunder.

                                       17
<PAGE>

                              PLAN OF DISTRIBUTION

   The shares of common stock covered by this prospectus may be offered and
sold from time to time by the Selling Stockholders, including donees,
transferees, pledgees or other successors in interest that receive such shares
as a gift or other non-sale related transfer. Each of the Selling Stockholders
will act independently of Lycos in making decisions with respect to the timing,
manner and size of any sale. Each of the Selling Stockholders may sell the
shares on The Nasdaq National Market, or otherwise, at prices and under terms
then prevailing or at prices related to the then current market price or at
negotiated prices. The shares may be sold by one or more of the following means
of distribution: (a) a block trade in which the broker-dealer so engaged will
attempt to sell shares as agent, but may position and resell a portion of the
block as principal to facilitate the transaction; (b) purchases by a broker-
dealer as principal and resale by the broker-dealer for its own account
pursuant to this prospectus; (c) an over-the-counter distribution in accordance
with the rules of The Nasdaq National Market; (d) ordinary brokerage
transactions and transactions in which the broker solicits purchasers; and (e)
in privately negotiated transactions. To the extent required, this prospectus
may be amended and supplemented from time to time to describe a specific plan
of distribution. In connection with distributions of the shares or otherwise,
each of the Selling Stockholders may enter into hedging transactions with
broker-dealers or other financial institutions. In connection with these
transactions, broker-dealers or other financial institutions may engage in
short sales of Lycos common stock in the course of hedging the positions they
assume with such Selling Stockholder. Each of the Selling Stockholders may also
sell Lycos common stock short and redeliver the shares to close out such short
positions. Each of the Selling Stockholders also may enter into option or other
transactions with broker-dealers or other financial institutions which require
the delivery to the broker-dealer or other financial institution of shares
offered hereby, which shares the broker-dealer or other financial institution
may resell pursuant to this prospectus (as supplemented or amended to reflect
such transaction). Each of the Selling Stockholders also may pledge shares to a
broker-dealer or other financial institution, and, upon a default, the broker-
dealer or other financial institution, may affect sales of the pledged shares
pursuant to this prospectus (as supplemented or amended to reflect such
transaction). In addition, any shares that qualify for sale pursuant to Rule
144 may be sold under Rule 144 rather than pursuant to this prospectus.

   In effecting sales, brokers, dealers or agents engaged by the Selling
Stockholders may arrange for other brokers or dealers to participate. Brokers,
dealers or agents may receive commissions, discounts or concessions from the
Selling Stockholders in amounts to be negotiated prior to the sale. These
brokers or dealers and any other participating brokers or dealers may be deemed
to be "underwriters" within the meaning of the Securities Act of 1933 in
connection with these sales, and any commissions, discounts or concessions may
be deemed to be underwriting discounts or commissions under the Securities Act
of 1933. Lycos will pay all expenses incident to the offering and sale of the
shares to the public other than any commissions and discounts of underwriters,
dealers or agents and any transfer taxes.

   In order to comply with the securities laws of certain states, if
applicable, the shares must be sold in such jurisdictions only through
registered or licensed brokers or dealers. In addition, in certain states the
shares may not be sold unless they have been registered or qualified for sale
in the applicable state or an exemption from the registration or qualification
requirements is available and is complied with.

   Lycos has advised each of the Selling Stockholders that the anti-
manipulation rules of Regulation M under the Securities and Exchange Act of
1934 may apply to sales of shares in the market and to the activities of the
Selling Stockholders and their respective affiliates. In addition, Lycos will
make copies of this prospectus available to each of the Selling Stockholders
and has informed it of the need for delivery of copies of this prospectus to
purchasers at or prior to the time of any sale of the shares. Each of the
Selling Stockholders may indemnify any broker-dealer that participates in
transactions involving the sale of the shares against certain liabilities,
including liabilities arising under the Securities Act of 1933.

                                       18
<PAGE>

   At the time a particular offer of shares is made, if required, a prospectus
supplement will be distributed that will set forth the number of shares being
offered and the terms of the offering, including the name of any dealer or
agent, any discount, commission and other item constituting compensation, any
discount, commission or concession allowed or reallowed or paid to any dealer,
and the proposed selling price to the public. We cannot assure you that the
Selling Stockholders will sell all or any of the shares.

   Lycos has agreed with each of the Selling Stockholders to keep the
registration statement of which this prospectus constitutes a part effective
until the earlier to occur of (i) the sale of all the shares covered by this
prospectus and (ii) February 2, 2001. Lycos intends to de-register any of the
shares not sold by any Selling Stockholder.

                                       19
<PAGE>

                                    BUSINESS

Overview

   Lycos is a global media company operating one of the Internet's leading
networks of separately branded websites. The Lycos Network is one of the most
visited online destinations in the world, reaching nearly one out of every two
U.S. Internet users in November 1999. According to a 1999 Media Metrix report,
our network of branded websites contained four of the twenty most visited U.S.
destinations on the Web. The Lycos Network enables users to quickly access and
retrieve information, communicate with other Internet users, easily establish
online communities and engage in commerce. Our popular websites provide a broad
offering of integrated content and services, attracting users into the Lycos
Network through multiple points of entry and creating a large and diverse
audience. During November 1999, we generated more than 2.5 billion page views
and, according to Media Metrix, reached more than 29 million unique users.

   The Lycos Network provides an attractive medium for advertisers, who can
tailor their offerings to reach our large and diverse audience by advertising
across the Lycos Network or toward narrower demographic segments by advertising
in a specific site or content area. The Lycos Network has attracted a wide
variety of advertisers, including Dell, Intel, Motorola, Johnson & Johnson,
Macy's, OfficeMax and Sears. Our large audience and distinctly branded sites
also appeal to large and small e-commerce merchants. We facilitate e-commerce
in two key ways. First, we integrate the product and service offerings from
merchant partners such as barnesandnoble.com directly into our search,
navigation and content offerings. Second, through our recently established
LYCOShop, we offer an online shopping marketplace that enables users to easily
purchase a broad variety of goods and services without leaving our sites.

   We use our recognized brands and Internet operating expertise to create
appealing country-specific content and service offerings for Internet users
around the world, either independently or through joint ventures with local
media and technology companies. We currently offer country-specific versions of
our Lycos search and navigation service and other selected network services in
Argentina, Belgium, Brazil, Chile, Denmark, France, Germany, Ireland, Italy,
Japan, Mexico, The Netherlands, Norway, Peru, Singapore, South Korea, Spain,
Sweden, Switzerland, the United Kingdom and Venezuela. Through the expansion of
the Lycos products and services into these markets, we believe we have
established our position as a global Internet leader.

The Lycos Network

   The Lycos Network attracts a broad demographic base of Internet users
through independently branded websites, each of which seeks to address
different interests and needs. Although users typically access the Lycos
Network for specific content through one of our separately branded sites, they
are encouraged to remain in the Lycos Network by the breadth of our offerings
and the easy navigation amongst our sites. The Lycos Network is primarily
composed of the following websites:

     lycos.com--a comprehensive portal which offers search and directory
  accompanied by deep vertical content.

     hotbot.com--a sophisticated search service that provides users the
  ability to perform advanced Web searches.

     tripod.com--a personal publishing community, featuring quality user-
  generated content created through easy to use homepage building tools for
  beginners and experienced users.

     angelfire.com--a personal publishing community, similar to Tripod, but
  with a focus on a younger age group.

     whowhere.com--a home address, e-mail address and telephone number
  directory that assists users in locating individuals worldwide.

     mailcity.com--a Web-based e-mail service that offers users a
  personalized e-mail account accessible from any computer with an Internet
  connection.

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     quote.com--a broad-based financial site that provides financial market
  data such as stock and mutual fund quotes, news and research.

     sonique.com--a website featuring our proprietary music player, which
  allows our users to download and listen to various audio formats.

     gamesville.com--an interactive gaming site featuring virtual card games,
  trivia quizzes and traditional games such as bingo.

     Wired News--located at Wired.com--a daily news service offering
  reporting and analysis of technology trends.

     LYCOShop--located at Shop.Lycos.com--an online consumer marketplace
  offering products from over 2,000 retailers.

   We encourage users to remain within the Lycos Network through the use of
links, promotions, shared content and banner advertisements that feature other
Lycos properties. For example, when a user conducts a search using the
Lycos.com search service, we offer the user the opportunity to perform the same
search using our HotBot service with one click. Through integration and cross-
promotion of the Lycos Network of websites, we intend to increase the frequency
and length of user visits.

   We believe that our network strategy enables Lycos to appeal to a large and
an increasingly diverse Internet audience. As a result, the Lycos Network
provides an attractive medium for advertisers who seek to perform broad or
targeted advertising as well as for online merchants. Between January 1998, the
month before Lycos formally launched its network strategy with its acquisition
of Tripod, and November 1999, Lycos' reach in the U.S. grew from approximately
14% of home users and 22% of users at work to approximately 45% of total U.S.
online users, according to Media Metrix.

Strategy

   Our objective is to be the most visited and utilized global online
destination. The essential elements of our strategy include:

  . Expand the Reach of the Lycos Network. We intend to continue to increase
    the number of users of the Lycos Network through partnerships and
    alliances, the expansion of existing and addition of new brands, and by
    providing enhanced content and services to our users. We will continue to
    enter into agreements to provide direct access to our products and
    services through computer hardware and software companies, such as IBM,
    Internet service providers (ISPs), such as Juno, and providers of
    wireless and broadband Internet access, such as Ericsson and RCN. We seek
    to aggressively extend the recognition of the Lycos brand through online
    and off-line advertising and promotional campaigns in order to broaden
    the recognition of the various brands comprising the Lycos Network. We
    will also continue to enhance and expand the breadth and scope of our
    content, products and services to ensure that the Lycos Network provides
    appealing content to attract and retain users.

  . Increase the Frequency and Duration of User Visits to the Lycos
    Network. We believe that we can increase the frequency and duration of
    our users' visits to the Lycos Network by continually expanding the
    content, features and functionality of our product offering. We provide
    content and services through a variety of brands across the Lycos Network
    in an easy to navigate format that enhances the user experience and
    extends the duration of a user's visit to our sites. Throughout the Lycos
    Network, we promote our sites through the use of links, shared content
    and banner advertisements, making it easier for users to access
    additional content, functions and features while remaining within the
    Lycos Network.

  . Continue to Provide Comprehensive Advertising Solutions. We believe that
    our multi-brand strategy segments our user demographics more effectively
    than a single brand strategy and provides an attractive platform for
    measurable, targeted, cost-effective online advertising. Not only do we
    provide advertisers with the ability to target our large and diverse user
    base through network-wide advertising, but

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   advertisers can purchase site-based advertising on the individual network
   sites, thus targeting the demographic group that is specific to that site.
   We also assist our advertisers in developing innovative ways to reach
   their target audiences online. We design and offer customized packages
   that include the ability to change advertisements quickly and frequently;
   to link a search advertisement to a specific term or topic; to target
   advertisements based on demographics, geographic location and topical
   categories; and to track daily usage and other information.

  . Provide a Compelling E-Commerce Platform. We believe that we are well
    positioned to take advantage of the expected growth in the purchase of
    goods and services through the Internet. We integrate product and service
    offerings from merchant partners directly into our search, directory and
    community offerings on a topical basis. For example, through our
    arrangement with barnesandnoble.com, a user who conducts a search on a
    particular topic is presented with a link to the barnesandnoble.com
    website which contains a list of books on the topic. In addition,
    LYCOShop provides buyers and sellers with a seamless e-commerce
    experience, incorporating products from over 2,000 retailers as well as
    auctions and classified ads.

  . Expand the Global Presence of the Lycos Network. The number of Internet
    users outside of the U.S. is projected to grow rapidly over the next
    several years. In order to take advantage of this growth, we have
    extended the Lycos products and services to countries in Europe and Asia
    by creating joint ventures with prominent local media and technology
    companies. These joint ventures allow us to reduce the costs and launch
    time associated with global expansion as well as leverage our operational
    and brand strengths and the promotional, marketing and sales strengths of
    our partners. We have also recently expanded our presence to include
    Argentina, Brazil, Chile, Colombia, Mexico, Peru and Venezuela. We expect
    to launch additional sites in Asia, Europe and Latin America during
    calendar year 2000.

Products and Services

   Lycos offers a comprehensive suite of online products and services. Our
principal offerings are described below.

Premier Navigation Functionality

   Lycos offers our users the ability to quickly and easily find and access
text, audio, video and other rich media content on the Web. Lycos' primary
navigation products include:

     Search. We offer two general search services-HotBot and Lycos Search.
  HotBot is designed for a sophisticated user while Lycos Search appeals to a
  mainstream user. Since many users enter the Internet through search
  services, Lycos and HotBot generate a significant portion of the Lycos
  Network traffic. HotBot has received many industry awards for its search
  service, including "Best Search Engine" by US News & World Report (November
  1999) and "Editor's Choice Search Engine (1999)" by PC Magazine. In
  addition, in December 1999 HotBot was selected as the favorite search
  service of Internet users surveyed by the Wall Street Journal. We also
  offer our users Lycos Rich Media Search, which enables them to find,
  download and listen to various music, audio and video formats (such as
  MP3).

     Guides and Directories. Lycos provides its users with an easy-to-use
  framework to efficiently explore the Internet through a series of guides
  and directories. Lycos' topic-based WebGuides provide categorized areas of
  interest that enable users to browse through related information. In an
  alliance with AOL, we also offer a version of the Open Directory which is a
  collection of websites organized by volunteer editors who have significant
  interest and expertise in the topics to which they contribute. The Open
  Directory compiles highly relevant links in an easy to navigate database.

     Reference Services. Lycos provides a suite of products for its users to
  locate other individuals, businesses, products and places. WhoWhere?, a
  home address, e-mail address and telephone number directory, assists users
  in locating individuals worldwide. Other principal reference services
  offered by

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  Lycos include a yellow pages product, which allows users to locate
  businesses throughout the United States by searching according to category,
  business name, business address or keyword; Lycos Classifieds, which gives
  users a convenient way to find where to buy and sell goods and services
  online; and Lycos RoadMaps, which allows users to obtain driving directions
  and maps to virtually any street address in the United States.

Content and Information Resources

   Lycos provides a variety of content offerings throughout the Lycos Network,
such as:

     Games. We recently acquired Gamesville.com, one of the leading online
  gaming sites, that is now the featured product offering on the Lycos Games
  WebGuide. According to Media Metrix, in November 1999, the Gamesville.com
  site ranked third among the top 500 U.S. websites in average usage at
  approximately 15 minutes per day. The Gamesville.com offering supplements
  our existing menu of games which includes various board, card and other
  traditional games. Gamesville.com offers users the opportunity to win cash
  and other prizes competing in virtual card games, trivia quizzes and other
  traditional games, such as bingo. There is no fee for playing these games,
  and no money is wagered.

     Music. Lycos has created a comprehensive group of products in the music
  category, under the brand Lycos Music (music.lycos.com). These products
  include an MP3 search engine, a 35 channel radio network broadcast over the
  Internet, a catalog of sound files created by independent bands, and news
  and information from Rolling Stone and Billboard magazines. We have
  augmented these products with other relevant offerings, such as free
  homepages on which artists can publish their songs and fans can publish
  fanpages, and our Sonique music player, which allows users to download and
  listen to various music and audio formats.

     Personal Finance. Lycos recently acquired Quote.com, a leading personal
  finance content site. Lycos provides users with finance and investing tools
  through both its Quote.com site and through Lycos Investing
  (lycos.investing.com). Quote.com and Lycos Investing provide users with
  stock quotes, charts, news, research and analysis, as well as the ability
  to create and maintain information on a personal portfolio of stocks, all
  without charge. In addition, Quote.com offers users fee-based premium
  services, including streaming real time stock quotes.

     Kids. LycosZone (lycos.zone.com) provides a unique collection of
  products, content and services for children. We believe LycosZone has
  rapidly become one of the most popular websites targeted to children. The
  offerings include age-specific games, educational tools and special
  sections for parents and teachers. LycosZone provides links to a large
  number of national and local educational and information resources geared
  to children of all ages. LycosZone users are protected by our proprietary
  SearchGuard online filter, which aims to block out potentially
  inappropriate content.

     Technology. Lycos offers daily, in-depth news and analysis of the
  technology industry and its impact on business, culture and politics
  through our Wired News and HotWired (hotwired.lycos.com) services. These
  services keep users informed on the latest developments and trends across a
  broad range of technology topics. In addition, our Webmonkey
  (webmonkey.com) offering provides a wide array of tutorials on Web
  technology for both amateur and professional Website developers.

     Health. In collaboration with Healtheon/WebMD, Lycos Health WebGuide
  (webmd.lycos.com) provides a comprehensive health resource. This WebGuide
  provides medical reference tools and a full-range of information about
  healthy living, including medical news, health tips, chats with medical
  experts and specialized communities to help users stay informed about
  various health issues.

Personalization

   Through MyLycos, we provide users with the opportunity to personalize their
Lycos experience. MyLycos delivers a personalized version of the Lycos service,
including features such as news, weather, stock quotes,

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sports scores, horoscopes, lottery results, local television listings and
website reviews, all tailored by each individual to his or her preferences. We
believe MyLycos provides a value-added service to our users that increases
their overall use and duration of visits to the Lycos Network.

Online Community Products

   Lycos provides a number of services to allow its users to create and
actively manage communities around topics that interest them. Lycos believes
that users who become involved with Lycos online community products and
services are more likely to return to those sites in the future. Consequently,
Lycos seeks to develop an active, loyal user base by building significant
community features into the Lycos Network through the following online
products:

     Personal Publishing. Through its Angelfire and Tripod services, which
  together comprise one of the Web's largest online communities, Lycos offers
  users the online publishing tools necessary to create and publish their own
  personal homepages. The simplest pages can be created and published in
  minutes, yet the tools provided allow a user, without any programming
  skills, to create a "professional-looking" site that incorporates photos,
  images, graphics, audio and video files, and a guestbook. Through what are
  commonly known as "affiliate programs", users also can create links to e-
  commerce sites and earn credit towards purchases by referring visitors to
  those e-commerce sites.

     Clubs. Lycos Clubs (clubs.lycos.com) offers users the ability to create
  their own topic-based clubs enhanced by features such as instant messaging,
  e-mail, paging, chat and photo albums that are seamlessly integrated into
  each club. Instead of leaving a club to use these features, club members
  can instantly communicate from within the club. A creator of a club can
  open the club to the general public or can restrict access to a particular
  group of users by requiring a password.

     E-mail/Instant Messaging. Through our MailCity product, Lycos offers
  users a free, personalized Web-based e-mail account which can be accessed
  from any computer with an Internet connection. Since MailCity users do not
  need to change their e-mail addresses when they move or change Internet
  service providers, the same e-mail address can be used indefinitely. In
  addition, in an alliance with AOL, we launched the Lycos Instant Messenger
  service (messenger.lycos.com), enabling Lycos users to communicate
  instantly with each other and with AOL members.

     Chat and Bulletin Boards. Lycos offers users the opportunity to
  participate in online chat sessions, in which users can interact, in real
  time, with multiple users from all over the world. Lycos Chat
  (chat.lycos.com) regularly features hosted chats with celebrities and
  experts on topics of interest to Lycos users. Lycos Bulletin Board
  (boards.lycos.com) allows users to post messages to existing message
  threads or create a new thread by posting a message on a topic or topics of
  the user's choice.

Advertising Revenue

   According to Forrester Research, worldwide online advertising revenue is
expected to grow from $3.3 billion in 1999 to $33.1 billion in 2004. The large
and diverse audience reach of the Lycos Network, combined with our ability to
segment and target that audience, provides advertisers with an attractive
platform to promote their goods and services. The wide variety of content and
services available on the Lycos Network enables advertisers to focus their
promotional efforts on the Lycos Network sites most relevant to their product
or service offerings. Lycos advises customers on advertisement placement and
design, enabling them to develop and monitor their advertisements for
effectiveness. To facilitate these services, Lycos provides advertisers with
online reports showing impressions (an impression is a one-on-one view of an
advertisement by the end user) and the number of times users "click through" an
advertisement to visit the advertiser's site.

   We generate advertising revenue primarily by placing banner advertisements
and sponsorship links on the Web pages that are displayed on the Lycos Network.
From each advertisement, a viewer can link directly to the

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advertiser's website, thus affording the advertiser the opportunity to interact
directly with a potential customer. Our advertising contracts generally have a
term of one to twelve months. Advertising contracts are sold primarily as:

  . a site-based or network-based contract under which a customer is
    guaranteed a number of impressions placed throughout a particular site or
    the entire Lycos Network; or

  . contracts targeted to a particular audience or user, either in connection
    with one of our topical WebGuides or in connection with specified word
    searches (for example, when "automobile" is searched, an automotive or
    car manufacturer advertisement appears).

   We employ a direct sales force to address the new and evolving requirements
of the Internet advertising market. We have hired the majority of our sales
force from the advertising industry because we believe that an experienced
sales force is critical to initiate and maintain relationships with advertisers
and advertising agencies. Lycos employs advertising sales personnel in Atlanta,
Boston, Chicago, Dallas, Los Angeles, New York, Miami, Philadelphia and San
Francisco.

Electronic Commerce Revenue

   International Data Corporation estimates that revenues from e-commerce will
grow from $50.4 billion in 1998 to $1.3 trillion in 2003. According to a 1999
study by CBS Marketwatch, 78% of all online users search and navigate the Web
for product and service information while 36% of all online users search and
navigate the Web with a specific intent to buy. With the Lycos Network reaching
nearly one out of two U.S. Internet users in November 1999, Lycos represents an
attractive e-commerce platform. Lycos provides opportunities for our users to
purchase products and services throughout the Lycos Network both by integrating
commerce opportunities into contextually relevant placements on the Lycos
Network sites and through our online marketplace, LYCOShop.

Lycos Network E-Commerce Activities

   We believe that integrating e-commerce opportunities into the Lycos Network
search and navigation services provides an easy and useful shopping experience
for our users. Specifically, we integrate the opportunity to purchase related
products and services into the results of commerce-related searches performed
by our users. In addition, we provide certain merchant partners with prominent
positioning for their product or service offering in appropriate sites within
the Lycos Network. In return, Lycos generally receives a fixed fee and a share
of the related e-commerce revenue.

   Our e-commerce agreements typically have one to three year terms. In some
instances, we have entered into exclusive sponsorship arrangements for certain
commercial categories. Our e-commerce relationships include agreements with the
following companies:

     AT&T--provides Lycos users with an ability to purchase telecommunication
  services over the Internet.

     barnesandnoble.com--provides Lycos users with the opportunity to
  purchase books throughout the Lycos Network.

     First USA Bank--provides Lycos users with a wide range of online banking
  products through its WingspanBank.com online bank.

     Fleet Credit Card Services--provides Lycos users with a Lycos branded
  credit card.

LYCOShop

   In October 1999, we launched LYCOShop, an online marketplace offering
thousands of products and services from over 2,000 brand name retailers and
small specialty stores, including: Eddie Bauer; FogDog

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Sports; REI; and The Gap. In addition to online retailing, LYCOShop provides
our participating merchants and users with the ability to conduct online
auctions and list classified advertisements for products and services. LYCOShop
provides its users with valuable services, including product reviews and
search, navigation and community at each stage in the buying cycle so that
shoppers can research their buying options, discuss products and services with
other consumers and compare product and price features prior to making a
purchase. LYCOShop also provides shoppers the convenience of a "universal
shopping cart" which allows shoppers to purchase items from more than one
merchant within LYCOShop without having to re-register their personal
information (such as credit card and delivery information) with each merchant.
LYCOShop provides telephonic customer support to augment online support and
provides users with a rewards program to increase customer loyalty. During the
holiday season in 1999 (Thanksgiving to Christmas), the number of unique users
on LYCOShop was 450 percent greater than our shopping traffic during the same
period in 1998.

   For participating merchants, LYCOShop features a sophisticated store-
building product that permits large and small retailers to create and maintain
online stores, accept credit card purchases, track sales, and also sell their
products through auctions and classifieds. Lycos generates revenue from
LYCOShop through merchant site hosting fees, slotting fees and by charging
merchants a percentage of each transaction's value. Our participating merchants
provide fulfillment and distribution services for LYCOShop.

Acquisitions and Strategic Alliances

   We pursue acquisitions and alliances with strategic partners in order to
increase the number of visitors to the Lycos Network, the frequency with which
our users visit the Lycos Network and the amount of time they spend on the
Lycos Network each visit.

Recent Acquisitions

   We have continued to expand our product and service offerings and audience
reach by acquiring businesses, technologies, content and services. Since
February 1998, we have completed eight acquisitions, including the following
acquisitions which we completed in December 1999:

  . Quote.com. Quote.com provides information, tools and trading capabilities
    to independent investors, including financial news, stock quotes and
    research. Among the tools offered on the Quote.com website are "QCharts",
    a Windows-based real-time market analysis and transaction tool that gives
    users the ability to set up their own "trading workstation" by enabling
    them to open multiple charts and portfolio sheets all updating
    automatically in one window of their computer screen. Quote.com
    significantly enhances Lycos' financial content offering and provides
    Lycos with high-quality products, content and functions in a widely used
    area within the Lycos Network.

  . Gamesville.com. Gamesville.com is a leading interactive entertainment
    community where members compete for prizes by playing multi-player real-
    time games. The Gamesville.com acquisition complements Lycos' strategic
    goal of keeping users in the Lycos Network for longer periods of time.
    Additionally, because of the information that Gamesville.com's users
    permit us to access through the registration process, Gamesville.com
    delivers state-of-the-art, 1-to-1 targeted database marketing solutions
    to brand name advertisers.

   We continuously identify and evaluate potential acquisition candidates and
in many cases engage in discussions and negotiations regarding potential
acquisitions. We currently have no agreements with respect to any proposed
acquisitions.

Strategic Alliances

   To increase traffic to the Lycos Network, enhance the functionality of our
products and services and extend the Lycos brand, we seek to enter into
strategic relationships with business partners who offer content,

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distribution and technology capabilities as well as marketing and cross-
promotional opportunities. To date, we have more than 250 alliances with a
variety of companies. Examples of our strategic alliances include:

Content

     Healtheon/WebMD--Through our agreement with Healtheon/WebMD, we provide
  our users a comprehensive suite of health-related information. This
  information has been incorporated within the existing Lycos Network
  websites and is co-branded with Healtheon/WebMD.

     Rolling Stone--We have an agreement that allows us to incorporate
  content from Rolling Stone, including artist reviews, into Lycos Music.
  This content is co-branded, with both the Rolling Stone and Lycos brands
  prominently featured.

     Preview Travel--Preview Travel provides us with travel-related content
  that is displayed on a co-branded version of the Preview Travel site, which
  is linked to contextually relevant pages on the Lycos Network. This content
  includes a "fare finder" and other information about travel deals, travel
  news headlines and destination guides by location. Lycos users can complete
  all of their travel plans through this co-branded Preview Travel site.

Distribution

   Computer Manufacturers and Software Developers--Lycos' products and services
are a default offering on software such as IBM's Lotus Notes, and hardware such
as IBM's Aptiva and Thinkpad computers.

   Internet Service Providers (ISPs)--We have agreements with a number of ISPs,
including Juno and RCN, under which Lycos is a default offering on their
homepages.

   AOL/Netscape--Lycos has been designated as a "Premier Provider" of search
and navigation services accessible from the "Net Search" button on the Netscape
browser. AOL/Netscape will commit search exposures during the term of the
Netscape Agreement to Lycos' search services in exchange for a per-impression
payment by Lycos based on the actual number of exposures delivered to Lycos by
AOL/Netscape.

Technology

   Fidelity--Under our agreement with Fidelity, we provide personalization
technology for their PowerStreet online trading initiative. In return, we
receive prominent mention in PowerStreet advertising and sponsorship by
Fidelity of our Quote.com website.

   Fast Search & Transfer--We have an agreement with Fast Search and Transfer
that allows us access to their state-of-the-art MP3 music search technology. We
have incorporated this technology with our existing music content to provide
our users with the ability to find, listen to and discuss music. We have
recently entered into an agreement to invest in Fast Search & Transfer which
closed in January 2000.

   LYCOShop--We have entered into agreements with a number of companies,
including Open Market, Verio, Fairmarket, Frictionless Commerce,
NetPerceptions, ePinions and NetCentives, to use their underlying technology
for our LYCOShop e-commerce initiative. These technologies enable store
building, transaction processing, auctions, value-based comparisons, a
recommendation engine, product reviews and the Lycos Rewards program. Our
partners typically receive a commission from us on LYCOShop sales in exchange
for use of their technology.

   Ericsson--We are currently developing, in conjunction with Ericsson,
wireless.lycos.com, a website that will enable subscribers to view content
through Short Message Service and Wireless Access Protocol cellular phones.
This service will be co-marketed with Ericsson to wireless carriers with the
goal of making it the default offering for mobile users by offering
personalized services such as stock quotes, news and messaging capabilities.

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Strategic Investments

   Lycos has made direct strategic investments or received warrants in
privately-held Internet services companies whose products are integrated into
the Lycos Network. The companies in which we have made investments include:

  . FairMarket, a provider of auctions to business merchants and Web
    communities;

  . Bidder's Edge, a provider of tools and services that enable online
    auction users to easily and automatically find similar items from
    multiple online auctions;

  . Frictionless Commerce, a developer of comparison shopping technologies
    that take into account options such as price, product features, brand
    reputation and delivery time;

  . iCOMS, a provider of engineering, operational and merchant support for e-
    commerce services; and

  . Fast Search & Transfer ASA, a provider of state-of-the-art MP3 music
    search technology..

   We have also made investments in Mail.com (which completed its initial
public offering in June 1999), PlanetAll (which was acquired by Amazon.com in
August 1998) and Wit Capital (which completed its initial public offering in
June 1999).

International Expansion

   We believe the international markets will be a significant part of the
Internet base in the future. According to International Data Corporation,
Internet users outside the U.S. will increase from 79.4 million in 1998 to
325.5 million in 2003, a compound annual growth rate of approximately 33%. We
often seek to broaden our offerings of localized versions of our products and
services to users outside the United States by partnering with prominent local
media and technology companies. These arrangements are designed to leverage our
brands, technology and Internet operating expertise with their promotional,
marketing and sales strengths with the goal of reducing the time to market and
costs associated with our global expansion. In addition, our partners provide
local expertise and infrastructure, localized content and financing.

   We have established our position as a global Internet leader. We currently
offer 50 localized sites in 22 countries, primarily consisting of localized
versions of the Lycos search and navigation service, the Tripod community
service and the MailCity e-mail service. By creating sites in native languages
with local content and partnering with prominent local companies, we believe
that we can improve the experience for Internet users in their own countries.

   Our current international operations are:

     Lycos Europe. In May 1997, we entered into a joint venture agreement
  with Bertelsmann Internet Services to create localized versions of the
  Lycos search and navigation service and the Tripod community site
  throughout Europe. This joint venture, named Lycos Bertelsmann GmbH & Co.
  KG, is owned 50% by Lycos and 50% by Bertelsmann Internet Group. Lycos
  Bertelsmann currently operates localized versions of the Lycos.com and
  Tripod sites in Belgium, Denmark, France, Germany, Ireland, Italy,
  The Netherlands, Norway, Spain, Sweden, Switzerland and the United Kingdom.

     Lycos Japan. In March 1998, we established Lycos Japan KK as the basis
  for a joint venture to promote and operate a Japanese version of the Tripod
  and MailCity websites. Our joint venture partners are Sumitomo Corporation,
  one of the largest companies in Japan, Internet Initiative Japan, one of
  Japan's largest Internet service providers, and Kadokawa, a major Japanese
  publisher. Lycos beneficially owns approximately 45% of the joint venture.

     Lycos Korea. In March 1999, we established Lycos Korea to promote
  localized versions of the Lycos and Tripod websites. Our joint venture
  partner is Mirae Corporation, a prominent South Korean high-technology
  company. Lycos and Mirae each own 50% of the joint venture.

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<PAGE>

     Lycos Asia. In September 1999, we established Lycos Asia to promote
  localized versions of the Lycos and Tripod websites in more than 10
  countries in Asia, including Singapore, China, Taiwan, Hong Kong, India and
  Malaysia. Our joint venture partner is Singapore Telecommunications, and we
  each own 50% of the joint venture. Lycos Singapore was launched in December
  1999 and both simplified and traditional Chinese language services are
  expected to be launched in early 2000.

     Lycos Americas. In October 1999, we launched localized versions of the
  Lycos and Tripod websites in Argentina, Brazil, Chile, Colombia, Mexico,
  Peru and Venezuela as well as a United States-based Spanish language
  version of the Lycos and Tripod websites. These sites are currently owned
  entirely by us.

   In February 2000, we entered into a joint venture agreement with Bell Canada
to create a new Internet company, Sympatico--Lycos, to provide expanded
Internet resources for the business-to-consumer marketplace in Canada. As part
of the agreement, Bell Canada will invest $25 million to form the new company,
which will be majority owned by Bell Canada; Bell Canada has commitments to
make additional investments of $20 million, based on Sympatico-Lycos' working
capital needs. Bell Canada will also contribute a portfolio of business-to-
consumer Internet properties to Sympatico-Lycos. We will license to Sympatico-
Lycos applications such as the My Lycos customizable start page, free e-mail,
chat, shopping, homepage building and personalized news. The closing of the
joint venture is subject to completion of certain conditions, including certain
regulatory and other approvals. Separately, Bell ActiMedia and Lycos signed a
$40 million multi-year distribution agreement, under the terms of which Bell
products and services will be promoted to U.S. Lycos Network users accessing
the Network from Canada.

Lycos Ventures

   In July 1999, we formed Lycos Ventures, a $75 million venture capital fund,
in conjunction with Bear Stearns, Mellon Ventures, Sumitomo Corporation, Vulcan
Ventures and others to make early stage investments in companies involved in e-
commerce, online media or Internet technology. We have committed to invest up
to $10 million of the $75 million fund. To date, this fund has made investments
in several companies, including LifeMinders, FogDog Sports, Conducent
Technologies, Tekmetrics and Planet Feedback.

Marketing and Branding

   We support the Lycos Network globally through an integrated marketing and
branding strategy that includes advertising, public relations and promotions.
Our plan is designed to increase awareness of the Lycos brand, enhance loyalty
and increase usage of the Lycos Network. We believe that continuing to enhance
our brand name recognition is important to attract new users. We seek to
differentiate our offerings by giving them a personality, principally through
our mascot, "Lycos", the black Labrador retriever, and our "Go Get It" slogan.
Our advertising emphasizes that using the Lycos Network is fast, friendly and
fun. Our marketing efforts seek to create a Lycos brand that is consistent in
all of the countries in which we operate.

   We advertise both online and through traditional media, such as broadcast
and cable television, local radio, consumer and trade magazines, newspapers and
billboards. We are also extending the Lycos brand name by promoting our
products and services through other media, such as books, movies and videos.
Our online advertising includes banner advertisements throughout the Lycos
Network and across many other sites on the Internet. In addition, we promote
each of the sites within the Lycos Network both by creating hyperlinks among
the member sites and through banner promotion within the Lycos Network. We also
promote the Lycos brand through non-traditional marketing channels, including:

  . professional sports sponsorships, such as sponsorships of a NASCAR racing
    team, and an NFL and NHL team, Major League Indoor Soccer, NCAA
    basketball games and an America's Cup yacht, and hosting special event
    sites such as golf's 1999 USOpen.com and football's 1999 Superbowl.com;
    and

  . co-branded and cross-promotions with various packaged good companies,
    retail outlets and media companies such as Universal Studios, Pepsi and
    Ticketmaster.

                                       29
<PAGE>

   We also enter into strategic alliances with companies such as Fidelity and
Intel that include co-branded cross-promotions designed to generate off-line
media exposure.

Operations and Technology

   We use a combination of proprietary and licensed technology to provide our
users with search and navigation services and capabilities that differentiate
the user experience of the Lycos Network from that of our competitors. Our
proprietary technologies include search technology, MyLycos personal page,
SearchGuard online filter, and Tripod and Angelfire personal publishing tools.
Through third parties, we license technologies such as search, directory
services, advertisement serving, commerce transaction processing, online
product reviews and value-based comparisons.

   The Lycos search and indexing technology was originally developed at
Carnegie Mellon University. In June 1995, Lycos entered into a license
agreement with Carnegie Mellon University pursuant to which Carnegie Mellon
University granted Lycos a perpetual, worldwide right to use and sub-license
the Lycos search and indexing technology and other intellectual property
rights, including the "Lycos" trademark and the domain name lycos.com. CMU has
been issued a patent in the United States relating to Lycos' search and
indexing technology.

   Most of our technological infrastructure operations are provided to us by
third parties. Exodus Communications hosts our servers and provides network
redundancy. Our outsourcing relationships have allowed us to grow quickly and
have reduced the costs associated with staffing and equipment.

Research and Development

   We focus our efforts both on developing our internal technologies and
integrating the technologies of our partners. We continue to develop
proprietary technologies that differentiate the Lycos user experience (such as
MyLycos), tools that strengthen the relationship between our sites (such as
universal registration) and methods of improving targeted advertising and e-
commerce on the Lycos Network. We are also working with partners to distribute
our content over broadband and wireless networks.

Competition

   The market for Internet products and services, advertising and e-commerce is
highly competitive. Lycos believes the principal competitive factors in this
market are name recognition, quality of content and commerce offerings, site
performance, ease of use, features and quality of support.

   A number of companies currently offer competitive products in our target
markets. The primary competitors of our products and services are other
companies providing online services and include About.com, Amazon.com, AOL, Ask
Jeeves, Buy.com, CMGi's AltaVista, Disney's GO Network, DealTime, Excite@Home,
FortuneCity, GoTo.com, Go2.net, Google, Infospace, Looksmart, Microsoft's MSN,
mySimon, NBCi (including Snap and Xoom), CBS StoreRunner, theGlobe.com and
Yahoo!. In addition, a number of companies offering Internet products and
services, including direct competitors of Lycos, recently have begun to
integrate multiple features within the products and services they offer to
consumers. These competitors have integrated competing products and services
through internal development, acquisitions, joint ventures and licensing
arrangements.

Employees

   As of December 31, 1999, Lycos' U.S. operations employed 919 persons,
including 457 in sales and marketing, 357 in research and development, product
development and service operations and 105 in finance and administrative
functions. Lycos also employs 69 independent contractors for software
development, documentation, artistic design and editorial reviews. In addition,
our international joint ventures employ an additional 250 persons in Europe and
Asia. None of our employees is represented by a labor union and Lycos considers
its employee relations to be good.

                                       30
<PAGE>

Properties

   Lycos' corporate headquarters is located in Waltham, Massachusetts. We also
have principal operating offices in New York City and San Francisco. We also
maintain sales offices in Atlanta, Boston, Chicago, Dallas, Los Angeles, Miami,
New York, Philadelphia and San Francisco. We expect that we will need
additional space as we continue to expand our business and believe that we will
be able to obtain additional space as needed on commercially reasonable terms.

   Lycos maintains substantially all of its computer systems in the California,
New Jersey and Massachusetts sites of Exodus Communications. Lycos' operations
are dependent in part upon its ability to protect its operating systems against
physical damage from fire, floods, earthquakes, power loss, telecommunications
failures, break-ins or other similar events. Furthermore, despite the
implementation of network security measures by Lycos, its servers are also
vulnerable to computer viruses, break-ins and similar disruptive problems. The
occurrence of any of these events could result in interruptions, delays or
cessations in service to users of our products and services which could
adversely impact our ability to operate our business.

Legal Proceedings

   In February 1999, Lycos announced its intention to enter into a transaction
with USA Networks and certain affiliated companies pursuant to which, among
other things, Lycos would have been merged into a subsidiary of USA Networks.
In May 1999, the parties to the proposed transaction terminated the proposed
merger by mutual agreement.

   Prior to the termination, eight purported class action lawsuits were filed
in the Court of Chancery for the State of Delaware in and for New Castle County
by shareholders of Lycos allegedly on behalf of all common stockholders of
Lycos. The complaints requested, among other things, that the proposed
transaction be enjoined or that rescissionary damages be awarded to the
purported class and that plaintiffs be awarded all costs and fees, including
attorneys' fees. Since the proposed merger was terminated, the suits have been
inactive. We believe that the allegations in the complaints are without merit
and, as a result of the termination of the proposed merger, are now moot.

   Also prior to the termination of the proposed merger, certain purported
securities class action lawsuits were filed in the United States District Court
for the District of Massachusetts. The suits, which have since been
consolidated, allege, among other claims, violations of United States
securities laws through alleged misrepresentations and omissions relating to
the announced transaction with USA Networks. The consolidated complaint seeks
an unspecified award of damages. We believe that the allegations in the
consolidated complaint are without merit and intend to contest them vigorously.
On October 22, 1999, we filed a motion with the court to have the lawsuit
dismissed for failure to adequately allege violations of the securities laws.

   In November 1999, AIWF Trust, a former shareholder of WiseWire Corporation,
filed a lawsuit in the Court of Common Pleas of Allegheny County, Pennsylvania
against WiseWire, representatives of former shareholders of WiseWire, and
Lycos, as WiseWire's alleged successor in interest. In this lawsuit, AIWF Trust
alleged that pursuant to a 1996 subscription agreement between AIWF Trust and
WiseWire, AIWF Trust was entitled to 2,500,000 million shares of WiseWire
common stock instead of the 25,000 shares it received. AIWF Trust seeks the
equivalent of 2,500,000 shares of WiseWire common stock in Lycos common stock,
which amounts to approximately 748,000 shares of Lycos common stock. Lycos
believes that the allegations in the complaint are without merit and intends to
contest them vigorously. In addition, Lycos has asserted a claim against the
escrow deposit created in connection with Lycos' acquisition of WiseWire, which
currently contains approximately 329,000 shares of Lycos common stock.

                                       31
<PAGE>

                                 LEGAL MATTERS

   The validity of the shares offered will be passed upon by Testa, Hurwitz &
Thibeault, LLP, Boston, Massachusetts, counsel to Lycos.

                                    EXPERTS

   The consolidated financial statements of Lycos at July 31, 1999, 1998 and
1997 and for each of the years in the three-year period ended July 31, 1999,
incorporated in this prospectus by reference to Lycos' Annual Report on Form
10-K for the year ended July 31, 1999 and the Form 8-K/A filing on January 4,
2000, and the consolidated financial statements of Wired Ventures, Inc. at
December 31, 1998 and 1997 and for each of the years in the three year period
ended December 31, 1998 incorporated by reference to the Form 8-K filing on
July 15, 1999 have been audited by KPMG LLP, independent auditors, as set forth
in their reports thereon included therein, and are incorporated herein by
reference in reliance upon such report given upon the authority of such firm as
experts in accounting and auditing.

                                       32
<PAGE>

                                    PART II

                   INFORMATION NOT REQUIRED IN THE PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

   Lycos will pay all expenses incident to the offering and sale to the public
of the shares being registered other than any commissions and discounts of
underwriters, dealers or agents and any transfer taxes. Such expenses are set
forth in the following table. All the amounts shown are estimates except the
Securities and Exchange Commission registration fee.

<TABLE>
   <S>                                                                 <C>
   SEC registration fee............................................... $ 10,694
   NASDAQ National Market listing fee................................. $  5,640
   Legal fees and expenses............................................ $ 10,000
   Printing expenses.................................................. $    750
   Miscellaneous expenses.............................................        0
                                                                       --------
     Total............................................................ $ 27,084
                                                                       ========
</TABLE>

ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS

   As permitted by Section 145 of the Delaware General Corporation Law, Lycos'
Amended and Restated Certificate of Incorporation, as amended, includes a
provision that eliminates the personal liability of its directors for monetary
damages for breach or alleged breach of their duty of care. In addition, the
Delaware General Corporation Law and Lycos' Amended and Restated By-laws
provide for indemnification of Lycos' directors and officers for liabilities
and expenses that they may incur in such capacities. In general, directors and
officers are indemnified with respect to actions taken in good faith in a
manner reasonably believed to be in, or not opposed to, the best interests of
Lycos, and with respect to any criminal action or proceeding, actions that the
indemnitee has no reasonable choice to believe were unlawful.

   Lycos has purchased insurance with respect to, among other things, the
liabilities that may arise under the provisions referred to above. The
directors and officers of Lycos also are insured against certain liabilities,
including certain liabilities arising under the Securities Act of 1933, as
amended, which might be incurred by them in such capacities and against which
they are not indemnified by Lycos.

   Lycos has entered into separate indemnification agreements with its
directors and officers. The indemnification agreements create certain
indemnification obligations of Lycos in favor of the directors and officers
and, as permitted by applicable law, will clarify and expand the circumstances
under which a director or officer will be indemnified.

ITEM 16. EXHIBITS

<TABLE>
 <C>  <S>
  5.1 Opinion of Testa, Hurwitz & Thibeault, LLP.
 23.1 Consent of KPMG LLP, Independent Accountants.
 23.2 Consent of KPMG LLP, Independent Accountants.
 23.3 Consent of Testa, Hurwitz & Thibeault, LLP (included in Exhibit 5.1).
 24.1 Power of Attorney (included on signature page).
</TABLE>

                                       33
<PAGE>

ITEM 17. UNDERTAKINGS

A. UNDERTAKING PURSUANT TO RULE 415

   The undersigned registrant hereby undertakes:

     (1) To file, during any period in which offers or sales are being made,
  a post-effective amendment to this registration statement to include any
  material information with respect to the plan of distribution not
  previously disclosed in the registration statement or any material change
  to such information in the registration statement;

     (2) That, for the purpose of determining any liability under the
  Securities Act of 1933, each such post-effective amendment shall be deemed
  to be a new registration statement relating to the securities offered
  therein, and the offering of such securities at that time shall be deemed
  to be the initial bona fide offering thereof; and

     (3) To remove from registration by means of a post-effective amendment
  any of the securities being registered which remain unsold at the
  termination of this offering.

B. UNDERTAKING REGARDING FILINGS INCORPORATING SUBSEQUENT EXCHANGE ACT
   DOCUMENTS BY REFERENCE

   The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Securities and Exchange Act of 1934 (and, where applicable, each filing of an
employee benefit plan's annual report pursuant to Section 15(d) of the
Securities Exchange Act of 1934) that is incorporated by reference in the
registration statement shall be deemed to be a new registration statement
relating to the securities offered therein, and the offering of such securities
at that time shall be deemed to be the initial bona fide offering thereof.

C. UNDERTAKING IN RESPECT OF INCORPORATED ANNUAL AND QUARTERLY REPORTS

   The undersigned registrant hereby undertakes to deliver or cause to be
delivered with the prospectus, to each person to whom the prospectus is sent or
given, the latest annual report, to security holders that is incorporated by
reference in the prospectus and furnished pursuant to and meeting the
requirements of Rule 14a-3 or Rule 14c-3 under the Securities Exchange Act of
1934; and, where interim financial information required to be presented by
Article 3 of Regulation S-X is not set forth in the prospectus, to deliver, or
cause to be delivered to each person to whom the prospectus is sent or given,
the latest quarterly report that is specifically incorporated by reference in
the prospectus to provide such interim financial information.

D. UNDERTAKING IN RESPECT OF INDEMNIFICATION

   Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
registrant pursuant to the foregoing provisions, or otherwise, the registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Securities
Act of 1933 and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless in
the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the
Securities Act and will be governed by the final adjudication of such issue.


                                       34
<PAGE>

E. UNDERTAKING PURSUANT TO RULE 430a

   The undersigned registrant hereby undertakes that:

     (1) For purposes of determining any liability under the Securities Act
  of 1933, the information omitted from the form of prospectus filed as part
  of this registration statement in reliance upon Rule 430A and contained in
  a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or
  (4) or Rule 497(h) under the Securities Act shall be deemed to be part of
  this registration statement as of the time it was declared effective.

     (2) For the purposes of determining any liability under the Securities
  Act of 1933, each post-effective amendment that contains a form of
  prospectus shall be deemed to be a new registration statement relating to
  the securities offered therein, and the offering of such securities at that
  time shall be deemed to be the initial bona fide offering thereof.

                                       35
<PAGE>

                                   SIGNATURES

   Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and has duly caused this registration
statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the City of Waltham, Commonwealth of Massachusetts, on this 15th
day of March, 2000.

                                          Lycos, Inc.

                                                  /s/ Robert J. Davis
                                          By: _________________________________
                                               President and Chief Executive
                                                          Officer

                               POWER OF ATTORNEY

   KNOW ALL MEN BY THESE PRESENTS THAT each person whose signature appears
below constitutes and appoints Robert J. Davis and Edward M. Philip and each of
them, with the power to act without the other, as attorneys-in-fact, each with
the power of substitution, for him or her in any and all capacities, to sign
any amendment or post-effective amendment to this registration statement and to
file the same, with exhibits thereto and other documents in connection
therewith, with the Securities and Exchange Commission, granting to said
attorneys-in-fact, and each of them, full power and authority to do and perform
each and every act and thing requisite and necessary to be done in connection
therewith, as fully to all intents and purposes as he might or could do in
person, hereby ratifying and confirming all that said attorneys-in-fact or any
of them, or their or his substitute or substitutes, may lawfully do or cause to
be done by virtue hereof.

   Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities and on the dates indicated.

<TABLE>
<CAPTION>
              SIGNATURE                          TITLE                   DATE
              ---------                          -----                   ----

<S>                                    <C>                        <C>
       /s/ Robert J. Davis             President, Chief Executive   March 15, 2000
______________________________________  Officer and Director
           Robert J. Davis              (Principal Executive
                                        Officer)

       /s/ Edward M. Philip            Chief Operating Officer,     March 15, 2000
______________________________________  Chief Financial Officer
           Edward M. Philip             and Secretary (Principal
                                        Financial and Accounting
                                        Officer)

     /s/ John M. Connors, Jr.          Director                     March 15, 2000
______________________________________
         John M. Connors, Jr.

       /s/ Richard H. Sabot            Director                     March 15, 2000
______________________________________
           Richard H. Sabot

        /s/ Daniel J. Nova             Director                     March 15, 2000
______________________________________
            Daniel J. Nova

        /s/ Peter A. Lund              Director                     March 15, 2000
______________________________________
            Peter A. Lund
</TABLE>

                                      S-1
<PAGE>

                               INDEX TO EXHIBITS

<TABLE>
<CAPTION>
 Exhibit
 Number  Description
 ------- -----------
 <C>     <S>
  5.1    Opinion of Testa, Hurwitz & Thibeault, LLP.

 23.1    Consent of KPMG LLP, Independent Accountants.

 23.2    Consent of KPMG LLP, Independent Accountants.

 23.3    Consent of Testa, Hurwitz & Thibeault, LLP (included in Exhibit 5.1).

 24.1    Power of Attorney (included on signature page).
</TABLE>

<PAGE>

                                                                     EXHIBIT 5.1

                                                                  March 15, 2000
Lycos, Inc.
400-2 Totten Pond Road
Waltham, MA 02451

RE: REGISTRATION STATEMENT ON FORM S-3

Ladies and Gentlemen:

   This opinion relates to an aggregate of 564,045 shares of common stock, par
value $.01 per share (the "Common Stock"), of Lycos, Inc. (the "Company"),
which are the subject matter of a Registration Statement on Form S-3 filed with
the Securities and Exchange Commission (the "Commission") on March 15, 2000
(the "Registration Statement"). All of the 564,045 shares of Common Stock have
been issued to the stockholders of Valent Software Corporation (the "Selling
Stockholders").

   Based upon such investigation as we have deemed necessary, we are of the
opinion that the 564,045 shares of Common Stock issued to the Selling
Stockholders and which may be sold by the Selling Stockholders pursuant to the
prospectus of which the Registration Statement is a part have been validly
issued and are fully paid and nonassessable.

   We hereby consent to the filing of this opinion as Exhibit 5.1 to the
Registration Statement and to the reference to our firm in the Prospectus under
the caption "Legal Matters."

                                             Very truly yours,

                                             /s/ Testa, Hurwitz & Thibeault,
                                          LLP

                                             Testa, Hurwitz & Thibeault, LLP

<PAGE>

                                                                    EXHIBIT 23.1

The Board of Directors of
Lycos, Inc.:

   We consent to the use of our reports incorporated by reference and to the
reference to our firm under the heading "Experts" in the prospectus.

                                          /s/ KPMG LLP

                                          KPMG LLP

Boston, Massachusetts
March 15, 2000

<PAGE>

                                                                    EXHIBIT 23.2

The Board of Directors of
Lycos, Inc.:

   We consent to the incorporation by reference in the registration statement
on Form S-3 of Lycos, Inc. or our report dated February 26, 1999, relating to
the consolidated balance sheets of Wired Ventures, Inc. and subsidiaries as of
December 31, 1997 and 1998, and the related consolidated statements and
operations and comprehensive income (loss), minority interest and stockholders'
(deficit) equity and cash flows for each of the years in the three-year period
ended December 31, 1998, which report appears in the Form 8-K of Lycos, Inc.
dated July 15, 1999.

                                          /s/ KPMG LLP

                                          KPMG LLP

San Francisco, California
March 15, 2000


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