AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MARCH 18, 1999
 
                                                      REGISTRATION NO. 333-
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                         ------------------------------
 
                                    FORM S-1
                             REGISTRATION STATEMENT
                        UNDER THE SECURITIES ACT OF 1933
                             ---------------------
 
                            STARMEDIA NETWORK, INC.
 
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                         ------------------------------
 

                                                                          
               DELAWARE                                  7375                                 06-1461770
     (State or Other Jurisdiction            (Primary Standard Industrial                  (I.R.S. Employer
  of Incorporation or Organization)          Classification Code Number)                Identification Number)

 
                             29 WEST 36(TH) STREET
                                  FIFTH FLOOR
                            NEW YORK, NEW YORK 10018
                                 (212) 548-9600
 
  (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                   REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
                         ------------------------------
 
                              FERNANDO J. ESPUELAS
               CHAIRMAN OF THE BOARD AND CHIEF EXECUTIVE OFFICER
                            STARMEDIA NETWORK, INC.
                             29 WEST 36(TH) STREET
                                  FIFTH FLOOR
                            NEW YORK, NEW YORK 10018
                                 (212) 548-9600
    (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA
                          CODE, OF AGENT FOR SERVICE)
                         ------------------------------
 
                                   COPIES TO:
 

                                                
            ALEXANDER D. LYNCH, ESQ.                            KEITH F. HIGGINS, ESQ.
              BABAK YAGHMAIE, ESQ.                            CHRISTOPHER J. AUSTIN, ESQ.
         BROBECK, PHLEGER & HARRISON LLP                             ROPES & GRAY
            1633 BROADWAY, 47TH FLOOR                           ONE INTERNATIONAL PLACE
            NEW YORK, NEW YORK 10019                          BOSTON, MASSACHUSETTS 02110
                 (212) 581-1600                                     (617) 951-7000

 
                         ------------------------------
 
    APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of this registration statement.
 
    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, check the following box. / /
 
    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 this Form is a post-effective amendment filed pursuant to Rule 462(d)
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
 


   TITLE OF EACH CLASS OF SECURITIES        PROPOSED MAXIMUM AGGREGATE OFFERING
            TO BE REGISTERED                              PRICE(1)                         AMOUNT OF REGISTRATION FEE
                                                                              
Common stock, par value $.001 per share                 $75,000,000                                 $20,850

 
(1) Estimated solely for the purpose of computing the registration fee pursuant
    to Rule 457(o) under the Securities Act of 1933, as amended.
                         ------------------------------
 
    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 OR UNTIL THE REGISTRATION STATEMENT SHALL BECOME
EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                  SUBJECT TO COMPLETION. DATED MARCH 18, 1999.
THE INFORMATION IN THIS PRELIMINARY PROSPECTUS IS NOT COMPLETE AND MAY BE
CHANGED. THESE SECURITIES MAY NOT BE SOLD UNTIL THE REGISTRATION STATEMENT FILED
WITH THE SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PRELIMINARY
PROSPECTUS IS NOT AN OFFER TO SELL NOR DOES IT SEEK AN OFFER TO BUY THESE
SECURITIES IN ANY JURISDICTION WHERE THE OFFER OR SALE IS NOT PERMITTED.

 

                                                       
                                 Shares
                         STARMEDIA NETWORK, INC.

 
                                  Common Stock
 
                               ------------------
 
    This is an initial public offering of shares of common stock of StarMedia
Network, Inc. All of the       shares of common stock are being sold by
StarMedia.
 
    Before this offering, there has been no public market for the common stock.
StarMedia currently anticipates that the initial public offering price will be
between $      and $      per share. Application has been made for quotation of
the common stock on the Nasdaq National Market under the symbol "STRM".
 
    SEE "RISK FACTORS" BEGINNING ON PAGE 6 TO READ ABOUT CERTAIN FACTORS YOU
SHOULD CONSIDER BEFORE BUYING SHARES OF THE COMMON STOCK.
 
                            ------------------------
 
    NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY OTHER REGULATORY BODY
HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR PASSED UPON THE ACCURACY OR
ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
OFFENSE.
 
                            ------------------------
 


                                                             Per Share            Total
                                                          ----------------  ------------------
                                                                      
Initial public offering price...........................  $                 $
Underwriting discount...................................  $                 $
Proceeds, before expenses, to StarMedia.................  $                 $

 
    The underwriters may, under certain circumstances, purchase up to an
additional       shares from StarMedia at the initial public offering price less
the underwriting discount.
 
                            ------------------------
 
    The underwriters expect to deliver the shares against payment in New York,
New York on             , 1999.
 
GOLDMAN, SACHS & CO.
 
               BANCBOSTON ROBERTSON STEPHENS
 
                              J.P. MORGAN & CO.
 
                                              SALOMON SMITH BARNEY
                            ------------------------
 
                     Prospectus dated              , 1999.

                                   [GRAPHICS]

                               PROSPECTUS SUMMARY
 
    YOU SHOULD READ THE FOLLOWING SUMMARY TOGETHER WITH THE MORE DETAILED
INFORMATION AND OUR CONSOLIDATED FINANCIAL STATEMENTS AND THE NOTES TO THOSE
STATEMENTS APPEARING ELSEWHERE IN THIS PROSPECTUS.
 
                            STARMEDIA NETWORK, INC.
 
                                  OUR BUSINESS
 
    StarMedia is the leading online network across Latin America. At a time when
content on the Internet is overwhelmingly in English, we offer Latin Americans a
pan-regional community experience, combined with a broad array of Spanish and
Portuguese content tailored for regional dialects and local cultural norms. We
also provide advertisers and merchants targeted access to Latin American
Internet users, an audience with a highly desirable demographic profile.
 
    Our network provides 16 interest-specific channels, extensive community
features, sophisticated search capabilities and online shopping in Spanish and
Portuguese. Our channels cover topics of interest to Latin Americans online,
such as local and regional news, business and sports. We promote user affinity
to the StarMedia community by providing in-language e-mail, chat rooms, instant
messaging and personal homepages. We develop our product offerings both
internally and through strategic relationships with third parties, including
Netscape, Disney, Reuters and Ziff-Davis.
 
    Our monthly page views have grown from approximately 7 million in December
1997 to approximately 61 million in December 1998, which represented
approximately 2.4 million user visits in that month. In addition, as of December
31, 1998, we had over 300,000 registered e-mail users.
 
    We believe that StarMedia appeals to advertisers and merchants because of
our:
 
    - focus on Latin America;
 
    - powerful brand image in Latin America;
 
    - highly-targeted and attractive demographic user base; and
 
    - effective advertising delivery and results tracking services.
 
    Consequently, we have been able to attract leading advertisers and sponsors
such as Bradesco, Ford, Fox Television, IBM, Microsoft, Motorola, Nokia and
Sony.
 
                             OUR MARKET OPPORTUNITY
 
    We believe that growth of Internet usage in Latin America will significantly
outpace growth of worldwide Internet usage over the next several years.
According to Nazca Saatchi & Saatchi, the number of Internet users in Latin
America is expected to increase from 7 million users at the end of 1997 to 34
million users by the end of 2000. In Latin America, 20% of the population
controls an estimated 65% of the overall buying power. Nazca Saatchi & Saatchi
also reports that 90% of Latin American Internet users are from upper and middle
socio-economic classes. This group represents an attractive demographic audience
for advertisers and businesses.
 
                                  OUR STRATEGY
 
    Our objective is to strengthen our position as the leading online network
across Latin America by:
 
    - aggressively extending our brand recognition;
 
    - enhancing and expanding our network of in-language content and
      pan-regional community;
 
    - delivering superior network functionality and speed; and
 
    - expanding into additional Spanish- and Portuguese-speaking markets.
 
                                       3

                                  OUR OFFICES
 
    Our principal executive offices are located at 29 West 36(th) Street, Fifth
Floor, New York, New York 10018 and our telephone number is (212) 548-9600. In
addition, we maintain offices in Sao Paulo, Mexico City, Buenos Aires, Bogota,
Santiago, Montevideo, Caracas and Miami. Our Internet address is
www.starmedia.com. The information on our Web site is not a part of this
prospectus.
 
                                 OUR TRADEMARKS
 
    STARMEDIA and the STARMEDIA logo are registered trademarks and service marks
of StarMedia. STARMEDIA.COM, TALKPLANET, BUSCAWEB, ORBITA, PIZARRAS and (V)PULSE
are trademarks and service marks of StarMedia. All other trademarks and service
marks used in this prospectus are the property of their respective owners.
 
                                  THE OFFERING
 
    The following information assumes that the underwriters do not exercise the
option we have granted to them to purchase additional shares in this offering.
Please see "Underwriting".
 

                                    
Shares offered by StarMedia..........
                                       shares
 
Shares to be outstanding after this
  offering...........................
                                       shares
 
Proposed Nasdaq National Market
  symbol.............................
                                       STRM
 
Use of proceeds......................
                                       To fund our marketing activities, expand our sales force, enhance our
                                       products and services, improve our network infrastructure, make strategic
                                       investments and acquisitions, and for general corporate purposes. Please
                                       see "Use of Proceeds".

 
    This information is based on our shares of common stock outstanding as of
December 31, 1998 and gives effect to the conversion of all outstanding shares
of redeemable convertible preferred stock into 31,996,667 shares of common stock
automatically on the closing of this offering. This information excludes:
 
    - 6,131,933 shares subject to options outstanding as of December 31, 1998 at
      a weighted average exercise price of $0.81 per share;
 
    - 3,868,067 additional shares that could be issued under our 1998 Stock
      Plan; and
 
    - 7,000,000 additional shares authorized for issuance under our 1998 Stock
      Plan in February 1999.
 
                                       4

                      SUMMARY CONSOLIDATED FINANCIAL DATA
 
    The following tables summarize the financial data for our business. You
should read this information with the discussion in "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and our consolidated
financial statements and notes to those statements included elsewhere in this
prospectus.
 


                                                                                         YEAR ENDED DECEMBER 31,
                                                                  PERIOD FROM MARCH 5,
                                                                   1996 (INCEPTION) TO   ------------------------
                                                                    DECEMBER 31, 1996      1997         1998
                                                                  ---------------------  ---------  -------------
                                                                                           
                                                                       (IN THOUSANDS, EXCEPT PER SHARE DATA)
CONSOLIDATED STATEMENT OF OPERATIONS DATA:
Revenues........................................................       $        --       $     460        $ 5,329
Operating expenses:
  Product and technology development............................                36           1,229          6,816
  Sales and marketing...........................................                12           2,108         29,274
  General and administrative....................................                78             648          4,600
  Depreciation and amortization.................................                 2              38            774
  Stock-based compensation expense..............................                --              --         10,421
                                                                          --------       ---------  -------------
  Total operating expenses......................................               128           4,023         51,885
                                                                          --------       ---------  -------------
Operating loss..................................................              (128)         (3,563)       (46,556)
  Interest income, net..........................................                --              35            670
                                                                          --------       ---------  -------------
Net loss........................................................              (128)         (3,528)       (45,886)
                                                                          --------       ---------  -------------
Preferred stock dividends and accretion.........................                --            (185)        (4,536)
Net loss available to common shareholders.......................       $      (128)      $  (3,713)      $(50,422)
                                                                          --------       ---------  -------------
                                                                          --------       ---------  -------------
Basic and diluted net loss per share............................       $     (0.01)      $    (.37)      $  (4.94)
                                                                          --------       ---------  -------------
Shares used in computing basic and diluted net loss per share...             9,147          10,012         10,202
                                                                          --------       ---------  -------------
Pro forma basic and diluted net loss per share..................                                         $  (1.09)
                                                                                                    -------------
Shares used in computing pro forma basic and diluted net loss
  per share.....................................................                                           42,199
                                                                                                    -------------
                                                                                                    -------------

 
    The following table is a summary of our balance sheet at December 31, 1998.
The pro forma data give effect to the conversion of our redeemable convertible
preferred stock. The pro forma as adjusted data reflect the sale of   shares of
common stock at an assumed initial public offering price of $  per share, after
deducting underwriting discounts and estimated offering expenses.
 


                                                                                   AS OF DECEMBER 31, 1998
                                                                            --------------------------------------
                                                                                                       PRO FORMA
                                                                              ACTUAL     PRO FORMA    AS ADJUSTED
                                                                            ----------  -----------  -------------
                                                                                            
                                                                                        (IN THOUSANDS)
CONSOLIDATED BALANCE SHEET DATA:
Cash and cash equivalents.................................................  $   53,141   $  53,141     $
Working capital...........................................................      47,512      47,512
Total assets..............................................................      60,986      60,986
Redeemable convertible preferred stock....................................      96,494          --
Total stockholders' (deficit) equity......................................     (43,393)     53,101

 
                                       5

                                  RISK FACTORS
 
    THIS OFFERING INVOLVES A HIGH DEGREE OF RISK. YOU SHOULD CAREFULLY CONSIDER
THE RISKS DESCRIBED BELOW BEFORE YOU DECIDE TO BUY OUR COMMON STOCK. IF ANY OF
THE FOLLOWING RISKS ACTUALLY OCCUR, OUR BUSINESS, FINANCIAL CONDITIONS OR
RESULTS OF OPERATIONS WOULD LIKELY SUFFER. IN THIS CASE, THE TRADING PRICE OF
OUR COMMON STOCK COULD DECLINE, AND YOU MAY LOSE ALL OR PART OF YOUR INVESTMENT.
 
    THIS PROSPECTUS CONTAINS FORWARD-LOOKING STATEMENTS BASED ON OUR CURRENT
EXPECTATIONS, ASSUMPTIONS, ESTIMATES AND PROJECTIONS ABOUT STARMEDIA AND OUR
INDUSTRY. THESE FORWARD-LOOKING STATEMENTS INVOLVE RISKS AND UNCERTAINTIES. OUR
ACTUAL RESULTS COULD DIFFER MATERIALLY FROM THOSE ANTICIPATED IN THESE
FORWARD-LOOKING STATEMENTS AS A RESULT OF CERTAIN FACTORS, AS MORE FULLY
DESCRIBED IN THIS SECTION AND ELSEWHERE IN THIS PROSPECTUS. WE UNDERTAKE NO
OBLIGATION TO UPDATE PUBLICLY ANY FORWARD-LOOKING STATEMENTS FOR ANY REASON,
EVEN IF NEW INFORMATION BECOMES AVAILABLE OR OTHER EVENTS OCCUR IN THE FUTURE.
 
          RISKS RELATED TO OUR FINANCIAL CONDITION AND BUSINESS MODEL
 
WE HAVE ONLY BEEN IN BUSINESS FOR A SHORT PERIOD OF TIME; YOUR BASIS FOR
  EVALUATING US IS LIMITED
 
    We were incorporated in March 1996. We commenced operations in September
1996 and launched the StarMedia network in December 1996. Accordingly, we have
only a limited operating history for you to evaluate our business. You must
consider the risks, expenses and uncertainties that an early stage company like
ours faces in the new and rapidly evolving Internet market. In order to address
these risks, we must:
 
    - increase awareness of the StarMedia brand and continue to build user
      loyalty;
 
    - expand the content and services on our network;
 
    - attract a larger audience to our network;
 
    - attract a large number of advertisers from a variety of industries;
 
    - maintain our current, and develop new, strategic relationships;
 
    - respond effectively to competitive pressures;
 
    - continue to develop and upgrade our technology; and
 
    - attract, retain and motivate qualified personnel.
 
    If we are unsuccessful in addressing these risks, our business, financial
condition and results of operations will be materially and adversely affected.
Please see "Management's Discussion and Analysis of Financial Condition and
Results of Operations" for detailed information on our limited operating
history.
 
WE HAVE NEVER MADE MONEY AND EXPECT OUR LOSSES TO CONTINUE
 
    We have never been profitable. As of December 31, 1998, we had an
accumulated deficit of approximately $54.3 million. We expect to continue to
incur significant losses for the foreseeable future. We expect to increase our
spending significantly.
 
    Although our revenues have grown in recent quarters, our expenses have grown
even faster. We will need to generate significant revenues to achieve
profitability. We may not achieve profitability. If our revenues grow more
slowly than we anticipate or if our operating expenses either increase more than
we expect or cannot be reduced in light of lower revenues, our business,
financial condition and results of operations will be materially and adversely
affected.
 
                                       6

OUR QUARTERLY OPERATING RESULTS ARE SUBJECT TO SIGNIFICANT FLUCTUATION AND YOU
  SHOULD NOT RELY ON THEM AS AN INDICATION OF OUR FUTURE RESULTS
 
    Our future revenues and results of operations may significantly fluctuate
due to a combination of factors, including:
 
    - growth and acceptance of the Internet, particularly in Latin America;
 
    - our ability to attract and retain users;
 
    - demand for advertising on the Internet in general and on our network in
      particular;
 
    - our ability to upgrade and develop our systems and infrastructure;
 
    - technical difficulties that users may experience on our network;
 
    - technical difficulties or system downtime resulting from the developing
      telecommunications infrastructure in Latin America;
 
    - competition in our markets;
 
    - foreign currency exchange rates that affect our international operations;
      and
 
    - general economic conditions in Latin America.
 
    Future revenues are difficult to forecast and for the foreseeable future
will depend on user traffic levels and advertising activity on our network. We
plan to increase our sales and marketing operations and to expand and develop
our content. We also plan to upgrade and enhance our technology and
infrastructure development in order to support our growth. We may be unable to
adjust spending quickly enough to offset any unexpected revenue shortfall. If we
have a shortfall in revenues in relation to our expenses, then our business,
results of operations and financial condition would be materially and adversely
affected. This would likely affect the market price of our common stock in a
manner which may be unrelated to our long-term operating performance.
 
    Due to these factors, and the other risks discussed in this section, you
should not rely on quarter-to-quarter comparisons of our results of operations
as an indication of our future performance. It is possible that, in future
periods, our results of operations may be below the expectations of public
market analysts and investors. This could cause the trading price of our common
stock to decline.
 
SEASONAL FACTORS MAY AFFECT OUR OPERATING RESULTS
 
    The level of use on our network is highly seasonal. Visitor traffic on our
network has historically been significantly lower during the first calendar
quarter of the year because:
 
    - it includes the summer months in much of Latin America;
 
    - our target audience tends to take extended vacations during these months;
      and
 
    - schools and universities are generally closed.
 
    Our advertising revenue is also subject to seasonal fluctuations.
Historically, advertisers have spent less in the first and second calendar
quarters. We believe that these seasonal trends will continue to affect our
results of operations. As a result, if our expenses increase during these
periods, it may materially and adversely affect our business, financial
condition and results of operations.
 
WE MAY HAVE DIFFICULTY OBTAINING ADDITIONAL CAPITAL IF NEEDED
 
    We intend to grow our business rapidly. Therefore, we will likely have
substantial future capital needs after this offering. Obtaining additional
financing will be subject to a number of factors, including:
 
    - market conditions;
 
    - our operating performance; and
 
    - investor sentiment.
 
    These factors may make the timing, amount, terms and conditions of
additional financing unattractive for us. If we are unable
 
                                       7

to raise capital to fund our growth, our business, financial condition and
results of operations would be materially and adversely affected.
 
                   RISKS RELATED TO OUR MARKETS AND STRATEGY
 
WE FACE RISKS ASSOCIATED WITH INTERNATIONAL OPERATIONS AND GENERAL ECONOMIC
  CONDITIONS IN LATIN AMERICA
 
    We have and expect to continue to derive substantially all of our revenues
from the Latin American markets. We intend to continue to expand into
international markets and to spend significant financial and managerial
resources to do so.
 
    We operate throughout Latin America, a region which in the past has been
subject to:
 
    - significant governmental influence over many aspects of its economy;
 
    - political and economic instability;
 
    - social unrest;
 
    - slow or negative growth;
 
    - high inflation;
 
    - high rates of unemployment;
 
    - currency fluctuations and devaluations;
 
    - changing interest rates;
 
    - changing tax laws;
 
    - imposition of exchange controls;
 
    - wage and price controls; and
 
    - restructuring of portions of external indebtedness owed to commercial and
      governmental creditors.
 
We have no control over these matters and any of them may adversely affect our
business, financial condition and results of operations.
 
    The currencies of many countries in Latin America have experienced
substantial depreciation and volatility against the U.S. dollar since July 1997.
The currency fluctuations, as well as higher interest rates and political
instability, have materially and adversely affected the economies of many
countries in Latin America, including countries which account for a significant
portion of our revenues.
 
    Our reporting currency is the U.S. dollar. In a number of cases, however,
customers in Latin America may be billed in local currencies. Our accounts
receivable from these customers will decline in value if the local currencies
depreciate relative to the U.S. dollar. To date, we have not tried to reduce our
exposure to exchange rate fluctuations by using hedging transactions. However,
we may choose to do so in the future. We may not be able to do this
successfully. In addition, we may be subject to exchange control regulations
which might restrict our ability to convert local currencies into U.S. dollars.
These exchange controls could have a material adverse effect on our business,
financial condition and results of operations.
 
    Our business internationally is subject to a number of other risks. These
include:
 
    - unexpected changes in regulatory requirements;
 
    - difficulties and costs of staffing and managing international operations;
 
    - differing technology standards;
 
    - potentially adverse tax consequences;
 
    - uncertain protection for intellectual property rights;
 
    - trade barriers for goods sold over our network;
 
    - difficulties in maintaining and upgrading our systems;
 
    - export restrictions and export controls relating to encryption technology;
      and
 
    - varying seasonal fluctuations in business activity.
 
    Any of these factors could adversely affect our business, financial
condition and results of operations.
 
                                       8

WE DEPEND ON THE GROWTH OF THE INTERNET IN LATIN AMERICA
 
    The Latin American Internet market is in an early stage of development. Our
future success depends on the continued growth of the Internet in Latin America.
Internet usage in Latin America may be inhibited for a number of reasons,
including:
 
    - the cost of Internet access;
 
    - concerns about security, reliability, and privacy;
 
    - ease of use; and
 
    - quality of service.
 
    Our business, financial condition and results of operations will be
materially and adversely affected if Internet usage in Latin America does not
continue to grow or grows more slowly than we anticipate.
 
UNDERDEVELOPED LATIN AMERICAN TELECOMMUNICATIONS INFRASTRUCTURES MAY LIMIT
  ACCESS TO THE INTERNET
 
    Access to the Internet requires a relatively advanced telecommunications
infrastructure. The telecommunications infrastructure in many parts of Latin
America is not as well-developed as in the United States or Europe. The quality
and continued development of the telecommunications infrastructure in Latin
America will have a substantial impact on our ability to deliver our services
and on the market acceptance of the Internet in Latin America in general. If
further improvements to the Latin American telecommunications infrastructure are
not made, the Internet will not gain broad market acceptance in Latin America.
If access to the Internet in Latin America does not continue to grow or grows
more slowly than we anticipate, our business, financial condition and results of
operations will be materially and adversely affected.
 
OUR PAN-REGIONAL APPROACH TO CONTENT DELIVERY MAY NOT BE SUCCESSFUL
 
    Latin America is made up of a number of diverse markets that differ
historically, culturally, economically and politically. We use a pan-regional
approach of customizing our content and advertisements to a particular user
based on the user's location. Users, however, may prefer content which is
specifically created for a local audience within Latin America using a strictly
localized approach over our pan-regional approach. This may materially and
adversely affect our business, financial condition and results of operations.
 
WE RELY ON THE INTERNET AS A MEDIUM FOR ADVERTISING AND ELECTRONIC COMMERCE
 
    We expect to derive most of our revenue for the foreseeable future from
Internet advertising. In order for us to generate revenue, advertisers and
advertising agencies must direct a portion of their budgets to the Internet and,
specifically, to our network. The Internet advertising market is new and rapidly
evolving, particularly in Latin America. As a result, we cannot gauge its
effectiveness or long term market acceptance as compared with traditional media.
Our business, financial condition and results of operations will be materially
and adversely affected if the Internet advertising market in Latin America fails
to develop or develops more slowly than we expect.
 
    Many of our current or potential advertising and electronic commerce
partners have limited experience using the Internet for advertising purposes and
have not devoted a significant portion of their advertising budgets to
Internet-based advertising. The adoption of Internet advertising requires the
acceptance of a new way of conducting business and exchanging information.
Advertisers that have invested substantial resources in other methods of
conducting business may be reluctant to adopt a new strategy that may limit or
compete with their existing efforts. These customers may find Internet
advertising to be less effective for promoting their products and services than
traditional print and broadcast media.
 
    Advertisers and electronic commerce marketers may choose not to advertise on
the StarMedia network if they do not perceive our audience demographic to be
desirable or
 
                                       9

advertising on our network to be effective. No standards have been widely
accepted for the measurement of the effectiveness of Internet advertising or to
measure the demographics of our visitor base. Standards may not develop
sufficiently to support the Internet as an effective advertising medium. If
these standards do not develop, advertisers may choose not to advertise on the
Internet in general or, specifically, on our network. This could have a material
adverse effect on our business, financial condition and results of operations.
 
    Different pricing models are used to sell advertising on the Internet. It is
difficult to predict which, if any, will emerge as the industry standard. This
makes it difficult to project our future advertising rates and revenues. Our
advertising revenues could be adversely affected if we are unable to adapt to
new forms of Internet advertising. Moreover, software programs are available
that limit or prevent advertising from being delivered to an Internet user's
computer. Widespread adoption of this software could adversely affect the
commercial viability of Internet advertising.
 
    Advertising based on impressions, or the number of times an advertisement is
delivered to users, comprises substantially all of our revenues. To the extent
that minimum guaranteed impression levels are not met, we defer recognition of
the corresponding revenues until guaranteed impression levels are achieved. To
the extent that minimum impression levels are not achieved, we may be required
to provide additional impressions after the contract term, which would reduce
our advertising inventory. This could have a material adverse effect on our
business, financial condition and results of operations.
 
OUR SUCCESS WILL DEPEND ON HOW WELL WE DEVELOP OUR BRAND
 
    Maintaining the StarMedia brand is critical to our ability to expand our
user base and our advertising and electronic commerce revenues. We believe that
the importance of brand recognition will increase as the number of Internet
sites in Latin America grows. In order to attract and retain Internet users,
advertisers and electronic commerce partners, we intend to increase
substantially our expenditures for creating and maintaining brand loyalty.
 
    Our success in promoting and enhancing the StarMedia brand will also depend
on our success in providing high quality content, features and functionality. If
we fail to promote our brand successfully or if visitors to our network or
advertisers do not perceive our services to be of high quality, the value of the
StarMedia brand could be diminished. This could have a material and adverse
effect on the business, financial condition and results of operations.
 
WE MAY BE UNABLE TO ADEQUATELY TRACK AND MEASURE THE DELIVERY OF ADVERTISEMENTS
 
    It is important to our advertisers that we accurately measure the
demographics of our user base and the delivery of advertisements on our network.
We depend on third parties to provide us with some of these measurement
services. If they are unable to provide these services in the future, we would
need to perform them ourselves or obtain them from another provider. This could
cause us to incur additional costs or cause interruptions in our business during
the time we are replacing these services. We are currently implementing
additional systems designed to record information on our users. If we do not
implement these systems successfully, we may not be able to accurately evaluate
the demographic characteristics of our users. Companies may choose to not
advertise on our network or may pay less for advertising if they do not perceive
our measurements or measurements made by third parties to be reliable.
 
WE DEPEND ON A SMALL GROUP OF ADVERTISERS
 
    In 1998, our top advertiser accounted for approximately 23% of our total
advertising revenues. In 1998, our top five advertisers accounted for
approximately 62% of our total advertising revenues. Our business, results of
operations and financial condition could be materially adversely affected by the
loss of one
 
                                       10

or more of our top advertisers. If we do not attract additional advertisers, our
business, financial condition and results of operations could be materially
adversely affected.
 
WE DEPEND ON OUR ADVERTISING SALES DEPARTMENT
 
    We depend on our advertising sales department to maintain and increase our
advertising sales. As of December 31, 1998, our advertising sales department
consisted of over 60 employees. The success of our advertising sales department
is subject to a number of risks, including:
 
    - competition in hiring and retaining qualified sales personnel; and
 
    - the length of time it takes new sales personnel to become productive.
 
    In addition, we are hiring sales personnel in Latin American countries where
the Internet advertising sales market is at an early stage of development. We
may have difficulty finding experienced and effective sales personnel. Our
business, financial condition and results of operations could be materially
adversely affected if we do not maintain an effective advertising sales
department.
 
WE MAY HAVE DIFFICULTY MANAGING OUR EXPANDING OPERATIONS
 
    We have recently experienced a period of rapid growth. This has placed a
significant strain on our managerial, operational and financial resources. To
accommodate this growth, we must implement new or upgraded operating and
financial systems, procedures and controls throughout many different locations.
We may not succeed with these efforts. Our failure to expand and integrate these
areas in an efficient manner could have a material adverse effect on our
business, financial condition and results of operations.
 
    We will need to recruit, train and retain a significant number of employees,
particularly employees with technical, marketing and sales backgrounds. These
individuals are in high demand. We may not be able to attract the staff we need.
Moreover, our systems, procedures and controls may not be adequate to support
our future operations and our management may not be able to achieve the rapid
execution necessary to fully exploit the market opportunity for our products and
services.
 
WE HAVE MANY COMPETITORS AND MAY NOT BE ABLE TO COMPETE EFFECTIVELY AGAINST THEM
 
    There are many companies that provide Web sites and online destinations
targeted to Latin Americans and Spanish- and Portuguese-speaking people in
general. All of these companies compete with us for visitor traffic, advertising
dollars and electronic commerce partners. The market for Internet content
companies in Latin America is new and rapidly evolving. Competition for
visitors, advertisers and electronic commerce partners is intense and is
expected to increase significantly in the future because there are no
substantial barriers to entry in our market. Increased competition could result
in:
 
    - lower advertising rates;
 
    - price reductions and lower profit margins;
 
    - loss of visitors;
 
    - reduced page views; or
 
    - loss of market share.
 
    Any one of these could materially and adversely affect our business,
financial condition and results of operations. Our ability to compete
successfully depends on many factors. These factors include:
 
    - the quality of the content provided by us and our competitors;
 
    - how easy our respective services are to use;
 
    - the effectiveness of our sales and marketing efforts; and
 
    - the performance of our technology.
 
    We compete with providers of content and services over the Internet,
including Web directories, search engines, content sites and
 
                                       11

sites maintained by government and educational institutions. Our current
competitors include:
 
    - companies that target Spanish-speakers throughout Latin America, like
      Ciudad Futura, El Sitio, Telefonica/Ole and Yupi;
 
    - Spanish and Portuguese language versions of U.S. companies like CompuServe
      and Yahoo!; and
 
    - companies like ZAZ (Brazil), CompuServe Mexico (Mexico), Ciudad Internet
      (Colombia) and Universo Online (Brazil), that target particular Latin
      American countries.
 
    In addition, America Online recently announced a joint venture with the
Cisneros Group to enter the Latin American Internet market, initially targeting
Brazil, Mexico and Argentina.
 
    Many of our competitors and potential competitors have:
 
    - longer operating histories;
 
    - greater name recognition in some markets;
 
    - larger customer bases; and
 
    - significantly greater financial, technical and marketing resources.
 
    These competitors may also be able to:
 
    - undertake more extensive marketing campaigns for their brands and
      services;
 
    - adopt more aggressive advertising pricing policies;
 
    - use superior technology platforms to deliver their products and services;
      and
 
    - make more attractive offers to potential employees, distribution partners,
      commerce companies, advertisers and third-party content providers.
 
    Our competitors may develop content that is better than ours or that
achieves greater market acceptance. It is also possible that new competitors may
emerge and acquire significant market share. These could have a material and
adverse effect on our business, financial condition and results of operations.
 
    We also compete with traditional forms of media, like newspapers, magazines,
radio and television for advertisers and advertising revenue. If advertisers
perceive the Internet or our network to be a limited or an ineffective
advertising medium, they may be reluctant to devote a portion of their
advertising budget to Internet advertising or to advertising on our network.
 
WE MUST CONTINUALLY ENHANCE AND DEVELOP THE CONTENT AND FEATURES OF OUR NETWORK
  TO ATTRACT VISITORS AND ADVERTISERS
 
    To remain competitive, we must continue to enhance and improve our content.
In addition, we must:
 
    - continually improve the responsiveness, functionality and features of our
      network; and
 
    - develop other products and services that are attractive to users and
      advertisers.
 
    We constantly attempt to determine what content, features and functionality
our target audience wants. We rely to a large extent on third parties for our
content, much of which is easily available from other sources. If other networks
present the same or similar content in a superior manner, it would adversely
affect our visitor traffic. In addition, the market for qualified content
development personnel is extremely competitive, especially for those that have
the requisite Latin American qualifications. We may not be able to identify or
hire these candidates.
 
    We may not succeed in developing or introducing features, functions,
products and services that visitors and advertisers find attractive in a timely
manner. This would likely materially and adversely affect our business,
financial condition and results of operations.
 
                                       12

WE DEPEND ON STRATEGIC THIRD-PARTY RELATIONSHIPS
 
    We have focused on establishing relationships with leading content
providers, electronic commerce merchants, technology providers, and
infrastructure providers. Our future success depends extensively on these
relationships. Because most of our agreements with these third parties are not
exclusive, our competitors may seek to use the same partners as we do and
attempt to adversely impact our relationships with our partners. We might not be
able to maintain these relationships or replace them on financially attractive
terms. If the parties with which we have these relationships do not adequately
perform their obligations, reduce their activities with us, choose to compete
with us or provide their services to a competitor, our business, financial
condition and results of operations could be materially and adversely affected.
Also, we intend to actively seek additional relationships in the future. Our
efforts in this regard may not be successful.
 
        RISKS RELATED TO THE INTERNET AND OUR TECHNOLOGY INFRASTRUCTURE
 
WE FACE RISKS OF UNEXPECTED SYSTEM INTERRUPTIONS AND CAPACITY CONSTRAINTS
 
    In the past, we have experienced significant and sudden increases in traffic
on our network. In addition, the number of pages of information transmitted over
our network, commonly referred to as page views, have continued to increase over
time. We are aggressively trying to increase our page views further. As a
result, our network must accommodate a high volume of traffic, often at
unexpected times. We have in the past experienced significant capacity
constraints with our systems. These have resulted in:
 
    - system disruptions;
 
    - inaccessibility of our network;
 
    - long response times;
 
    - impaired quality; and
 
    - loss of important reporting data.
 
    Although we are in the process of improving our network, we may not be
successful in implementing these measures. We may also, from time to time,
experience interruptions due to hardware failures, unsolicited bulk e-mail and
operating system failures. Because our revenues depend on the number of
individuals who use our network, our business will suffer if we experience
frequent or long system delays or interruptions. If this were to continue to
happen:
 
    - our visitors could perceive our network as not functioning properly;
 
    - our business could suffer dramatically; and
 
    - our brand could be adversely affected.
 
    If so, our business, financial condition and results of operations could be
materially adversely affected.
 
    We maintain our central production servers at the New Jersey data center of
Exodus Communications. We also have a second co-location facility at Digital
Island in New York. A failure by Exodus or Digital Island to protect their
systems against damage from fire, hurricanes, power loss, telecommunications
failure, break-ins or other events, could have a material adverse effect on our
business, financial condition and results of operations.
 
CONCERNS ABOUT SECURITY OF THE INTERNET MAY IMPEDE OUR GROWTH
 
    A significant barrier to electronic commerce and confidential communications
over the Internet has been the need for security. Internet usage could decline
if any well-publicized compromise of security occurred. We may incur significant
costs to protect against the threat of security breaches or to alleviate
problems caused by these breaches. Unauthorized persons could attempt
 
                                       13

to penetrate our network security. If successful, they could misappropriate
proprietary information or cause interruptions in our services. As a result, we
may be required to expend capital and resources to protect against or to
alleviate these problems. Security breaches could have a material adverse effect
on our business, results of operation and financial condition. In addition, the
inadvertent transmission of computer viruses could expose us to a material risk
of loss or litigation and possible liability.
 
YEAR 2000 PROBLEMS MAY DISRUPT OUR BUSINESS
 
    Many currently installed computer systems and software products only accept
two digits to identify the year in any date. Therefore, the year 2000 will
appear as "00", which the system might consider to be the year 1900 rather than
the year 2000. This could result in system failures, delays or miscalculations
causing disruptions to our operations.
 
    We are currently conducting an inventory, and developing testing procedures,
for all software and other systems that we believe might be affected by Year
2000 issues. Since third parties developed and currently support many of the
systems that we use, a significant part of this effort will be to ensure that
these third-party systems are Year 2000 compliant. We plan to confirm this
compliance through a combination of the representation by these third parties of
their products' Year 2000 compliance, as well as specific testing of these
systems.
 
    The failure of any of our systems or systems maintained by third parties to
be Year 2000 compliant could:
 
    - cause us to incur significant expenses to remedy any problems;
 
    - affect the availability and performance of our network; or
 
    - otherwise seriously damage our business.
 
    A significant Year 2000-related disruption to our network could cause our
users, advertisers or electronic commerce partners to be dissatisfied with our
network or could impose an unmanageable burden on our technical support staff.
 
    Our failure to correct a material Year 2000 problem could have a material
adverse effect on our business, financial condition and results of operations.
 
WE ARE SUBJECT TO THE RISKS OF INTEGRATING AND FUNDING OUR JOINT VENTURES,
  ACQUISITIONS AND ALLIANCES
 
    We may acquire or develop alliances or joint ventures with complementary
businesses, technologies, services or products. We do not know if we will be
able to complete any future joint ventures, acquisitions or alliances or that we
will be able to successfully integrate these transactions into our operations.
To finance these transactions, it may be necessary for us to raise additional
funds through public or private financings. Any equity or debt financings, if
available at all, may impact our operations and, in the case of equity
financings, may result in dilution to existing stockholders. If we are unable to
integrate or implement any joint venture, acquisition or alliance effectively,
our business, financial condition and results of operations could be materially
and adversely affected.
 
                                       14

         LEGAL UNCERTAINTY AND OTHER RISKS RELATING TO OUR ORGANIZATION
 
THE INTERNET IS SUBJECT TO MANY GOVERNMENTAL REGULATIONS WHICH MAY IMPACT OUR
  ABILITY TO CONDUCT BUSINESS
 
    To date, regulations have not materially restricted use of the Internet in
our markets. However, the legal and regulatory environment that pertains to the
Internet is uncertain and may change. New laws and regulations may be adopted.
Existing laws may be applied to the Internet and new forms of electronic
commerce. Uncertainty and new regulations could increase our costs and prevent
us from delivering our products and services over the Internet. It could also
slow the growth of the Internet significantly. This could delay growth in demand
for our network and limit the growth of our revenues. New and existing laws may
cover issues like:
 
    - sales and other taxes;
 
    - user privacy;
 
    - pricing controls;
 
    - characteristics and quality of products and services;
 
    - consumer protection;
 
    - cross-border commerce;
 
    - libel and defamation;
 
    - copyright, trademark and patent infringement;
 
    - pornography; and
 
    - other claims based on the nature and content of Internet materials.
 
    Each country in Latin America has its own telephone tariffs which, if too
high, may cause consumers to be less likely to access and transact business over
the Internet. Although the tariffs have been reduced recently in some countries,
we do not know whether this trend will continue. Unfavorable tariff developments
could decrease our visitor traffic and our ability to derive revenues from
transactions over the Internet. This could have a material adverse effect on our
business, financial condition and results of operations.
 
WE ARE SUBJECT TO FOREIGN LAWS AND REGULATIONS
 
    Because we have employees, property and business operations in the United
States and throughout Latin America, we are subject to the laws and the court
systems of many jurisdictions. We may become subject to claims in these foreign
jurisdictions for violations of their laws. In addition, these laws may be
changed, or new laws enacted, in the future. Any of the foregoing could have a
material adverse effect on our business, financial condition and results of
operations.
 
OUR KEY PERSONNEL ARE VERY IMPORTANT TO OUR SUCCESS
 
    We depend on the services of our senior management and key technical
personnel. Our success is dependent, in large part, on our ability to hire,
retain and motivate highly qualified technical and managerial personnel. In
particular, our success depends on the continued efforts of our Chairman and
Chief Executive Officer, Fernando J. Espuelas, and our President, Jack C. Chen.
The loss of the services of either executive officer or any of our key
management or technical personnel could have a material adverse effect on our
business, financial condition and results of operations.
 
WE ARE DEPENDENT ON OUR INTELLECTUAL PROPERTY
 
    We regard our copyrights, service marks, trademarks, trade secrets and other
intellectual property as critical to our success. We rely on trademark and
copyright law, trade secret protection and confidentiality and/or license
agreements with our employees, customers, partners and others to protect our
intellectual property rights. Despite our precautions, it may be possible for
third parties to obtain and use our intellectual property without authorization.
Furthermore, the validity, enforceability and scope of protection of
intellectual property in Internet-related industries is uncertain and still
evolving. The laws of some foreign countries do not protect intellectual
property rights to the
 
                                       15

same extent as do the laws of the United States. We pursue the registration of
our trademarks in the United States and internationally in Latin America, Spain
and Portugal.
 
    We may not be able to secure adequate protection for our trademarks in the
United States and other countries. We are aware of an opposition filed in Spain
against our application for registration of the StarMedia trademark which we are
currently contesting. In addition, there have been other oppositions filed
against our applications in other countries for some of our other marks.
Effective trademark protection may not be available in all the countries in
which we conduct business. Policing unauthorized use of our marks is also
difficult and expensive. In addition, it is possible that our competitors will
adopt product or service names similar to ours, thereby impeding our ability to
build brand identity and possibly leading to customer confusion. For example, we
are aware of certain unauthorized uses of our PIZARRAS trademark and intend to
pursue enforcement of our rights against those who are infringing this mark.
This may be time consuming and expensive. Our inability to effectively protect
our trademarks and service marks would have a material adverse effect on our
business, financial condition and results of operations.
 
    Many parties are actively developing chat, homepage, search and related Web
technologies. We expect these developers to continue to take steps to protect
these technologies, including seeking patent protection. There may be patents
issued or pending that are held by others and that cover significant parts of
our technology, business methods or services. For example, we are aware that a
number of patents have been issued in the areas of electronic commerce,
Web-based information indexing and retrieval and online direct marketing.
Disputes over rights to these technologies are likely to arise in the future. We
cannot be certain that our products do not or will not infringe valid patents,
copyrights or other intellectual property rights held by third parties. We may
be subject to legal proceedings and claims from time to time relating to the
intellectual property of others in the ordinary course of our business. In the
event that we determine that licensing this intellectual property is
appropriate, we may not be able to obtain a license on reasonable terms or at
all. We may also incur substantial expenses in defending against third-party
infringement claims, regardless of the merit of these claims. Successful
infringement claims against us may result in substantial monetary liability or
may prevent us from conducting all or a part of our business.
 
    We also intend to continue to license technology from third parties,
including our Web server and encryption technology. We may need to license
additional technologies to remain competitive. We may not be able to license
these technologies on commercially reasonable terms or at all. In addition, we
may fail to successfully integrate any licensed technology into our services.
Our inability to obtain any of these licenses could delay product and service
development until equivalent technology can be identified, licensed and
integrated.
 
WE MAY BE SUBJECT TO CLAIMS BASED ON THE CONTENT WE PROVIDE AND FOR THE PRODUCTS
  SOLD OVER OUR NETWORK
 
    The laws in the United States and in Latin American countries relating to
the liability of online service providers like us for activities of their
visitors are currently unsettled. Claims have been made against other online
service providers for defamation, negligence, copyright or trademark
infringement, obscenity, personal injury or other theories based on the nature
and content of information that was posted online by their visitors. We could be
subject to similar claims. In addition, we could be exposed to liability for the
selection of listings that may be accessible through our network or through
content and materials that our visitors may post in classifieds, message boards,
chat rooms or other interactive services. It is also possible that if any
information provided through our services contains errors, third parties could
make claims against us for losses incurred in reliance on the information.
 
                                       16

We offer Web-based e-mail services, which expose us to potential liabilities or
claims resulting from:
 
    - unsolicited e-mail;
 
    - lost or misdirected messages;
 
    - illegal or fraudulent use of e-mail; or
 
    - interruptions or delays in e-mail service.
 
    Investigating and defending these claims is expensive, even if they do not
result in liability.
 
    We have entered into arrangements to offer third-party products and services
on our network under which we may be entitled to receive a share of revenues
generated from these transactions. These arrangements may subject us to
additional claims including product liability or personal injury from the
products and services, even if we do not ourselves provide the products or
services. While our agreements with these parties often provide that we will be
indemnified against such liabilities, such indemnification may not be adequate.
 
    Although we carry general liability insurance, our insurance may not cover
all potential claims to which we are exposed or may not be adequate to indemnify
us for all liability that may be imposed. Any imposition of liability that is
not covered by insurance or is in excess of insurance coverage could have a
material adverse effect on our business, financial condition and results of
operations or could result in the imposition of criminal penalties. In addition,
the increased attention focused on liability issues as a result of these
lawsuits and legislative proposals could impact the overall growth of Internet
use.
 
                         RISKS RELATED TO THIS OFFERING
 
WE WILL HAVE DISCRETION AS TO THE USE OF THE PROCEEDS OF THIS OFFERING
 
    We intend to use the net proceeds from this offering to:
 
    - fund our marketing activities;
 
    - expand our sales force;
 
    - enhance our products and services;
 
    - improve our network infrastructure;
 
    - to make strategic investments and acquisitions; and
 
    - for general corporate purposes.
 
    We are not required to use the net proceeds for the purposes described
above. Our management will therefore have significant flexibility in applying
the net proceeds of this offering, including ways in which stockholders may
disagree. The failure of management to apply such funds effectively could have a
material adverse effect on our business, financial condition and results of
operations. See "Use of Proceeds".
 
OUR STOCK PRICE IS LIKELY TO BE HIGHLY VOLATILE
 
    Following this offering, an active trading market may not develop or be
sustained for our common stock. The price at which our common stock will trade
after this offering is likely to be highly volatile and may fluctuate
substantially due to a number of factors, including:
 
    - actual or anticipated fluctuations in our results of operations;
 
    - changes in or our failure to meet securities analysts' expectations;
 
    - technological innovations;
 
    - increased competition;
 
    - conditions and trends in the Internet and other technology industries;
 
    - Latin American market conditions; and
 
    - general market conditions.
 
    In addition, the stock market has from time to time experienced significant
price and volume fluctuations that have affected the market prices for the
securities of technology
 
                                       17

companies, particularly Internet companies. These broad market fluctuations may
result in a material decline in the market price of our common stock, regardless
of our operating performance. In the past, following periods of volatility in
the market price of a particular company's securities, securities class action
litigation has often been brought against that company. We may become involved
in this type of litigation in the future. Litigation is often expensive and
diverts management's attention and resources, which could have a material
adverse effect upon our business, financial condition and results of operations.
 
SHARES ELIGIBLE FOR PUBLIC SALE AFTER THIS OFFERING COULD ADVERSELY AFFECT OUR
  STOCK PRICE
 
    After this offering, there will be outstanding       shares of our common
stock, or       if the underwriters' over-allotment option is exercised in full.
Of these shares, the shares sold in this offering will be freely tradeable
except for any shares purchased by our "affiliates" as defined in Rule 144 under
the Securities Act. Of the remaining       shares of common stock held by
existing stockholders,       are subject to a 180-day lock-up agreement with
Goldman, Sachs & Co. and are eligible for sale only if registered or if they
qualify for an exemption from registration under Rules 144, 144(k) or 701 under
the Securities Act. In addition, subject to the provisions of Rules 144, 144(k)
and 701, 180 days after the date of this prospectus, at least 42,423,667 shares
will be available for sale in the public market, subject in the case of shares
held by affiliates to compliance with applicable volume restrictions. Sales of a
large number of shares could have an adverse effect on the market price of our
common stock.
 
    The stockholders have no restrictions on selling any of our securities held
by them, other than as provided in certain lock-up agreements with Goldman,
Sachs & Co. and under applicable securities laws. In addition, some of our
stockholders can require us to register our securities they own for public sale.
Any sales by these stockholders could adversely affect the trading price of our
common stock.
 
OUR CHARTER DOCUMENTS AND DELAWARE LAW MAY INHIBIT A TAKEOVER
 
    Provisions in our charter and bylaws may have the effect of delaying or
preventing a change of control or changes in our management that a stockholder
might consider favorable. These provisions include, among others:
 
    - the division of the board of directors into three separate classes;
 
    - the right of the board to elect a director to fill a space created by the
      expansion of the board;
 
    - the ability of the board to alter our bylaws; and
 
    - the requirement that at least 10% of the outstanding shares are needed to
      call a special meeting of stockholders.
 
    Furthermore, because we are incorporated in Delaware, we are subject to the
provisions of Section 203 of the Delaware General Corporation Law. These
provisions prohibit certain large stockholders, in particular those owning 15%
or more of the outstanding voting stock, from consummating a merger or
combination with a corporation unless:
 
    - 66 2/3% of the shares of voting stock not owned by this large stockholder
      approve the merger or combination; or
 
    - our board of directors approves the merger or combination or the
      transaction which resulted in the large stockholder owning 15% or more of
      our outstanding voting stock. Please see "Description of Capital Stock".
 
WE ARE CONTROLLED BY A SMALL GROUP OF OUR EXISTING STOCKHOLDERS, WHOSE INTERESTS
  MAY DIFFER FROM OTHER STOCKHOLDERS
 
    Our directors, executive officers and affiliates currently beneficially own
67.3% of the outstanding shares of our common stock, and after the offering will
own   % of the
 
                                       18

outstanding shares of our common stock. Accordingly, they will have significant
influence in determining the outcome of any corporate transaction or other
matter submitted to the stockholders for approval, including mergers,
consolidations and the sale of all or substantially all of our assets, and also
the power to prevent or cause a change in control. The interests of these
stockholders may differ from the interests of the other stockholders.
 
YOU WILL SUFFER IMMEDIATE AND SUBSTANTIAL DILUTION
 
    The initial public offering price per share will significantly exceed the
net tangible book value per share. Accordingly, investors purchasing shares in
this offering will suffer immediate and substantial dilution of their
investment. Please see "Dilution".
 
                                       19

                                USE OF PROCEEDS
 
    The net proceeds we will receive from the sale of the shares of common stock
offered by us are estimated to be $      million, assuming an initial public
offering price of $      per share and after deducting the estimated
underwriting discount and offering expenses. If the underwriters' over-allotment
option is exercised in full, we estimate that the net proceeds will be $
million.
 
    We intend to use the proceeds of this offering as follows:
 
    - to fund our marketing activities;
 
    - to expand our sales force;
 
    - to enhance our products and services;
 
    - to improve our network infrastructure;
 
    - to make strategic investments and acquisitions; and
 
    - for general corporate purposes.
 
    We believe opportunities may exist to expand our current business through
strategic investments or acquisitions. We may use a portion of the proceeds for
these purposes.
 
    We have not determined the amount of net proceeds to be used for each of the
specific purposes indicated. Accordingly, our management will have significant
flexibility in applying the net proceeds of the offering. Pending any use, the
net proceeds of this offering will be invested in short-term, interest-bearing
securities.
 
                                DIVIDEND POLICY
 
    We have never declared or paid any cash dividends on our common stock. We
currently intend to retain future earnings, if any, to finance the expansion of
our business. As a result, we do not anticipate paying any cash dividends in the
foreseeable future.
 
                                       20

                                 CAPITALIZATION
 
    The following table sets forth our capitalization as of December 31, 1998:
 
    - on an actual basis;
 
    - on a pro forma basis after giving effect to the automatic conversion of
      all outstanding shares of our convertible preferred stock into common
      stock; and
 
    - on a pro forma as adjusted basis to reflect our sale of shares of common
      stock at an assumed initial public offering price of $  per share, after
      deducting underwriting discounts and commissions and estimated offering
      expenses payable by us. Please see "Use of Proceeds".
 
    You should read this information together with our consolidated financial
statements and the notes to those statements appearing elsewhere in this
prospectus.


                                                                                   AS OF DECEMBER 31, 1998
                                                                            -------------------------------------
                                                                                           
                                                                                                    PRO FORMA AS
                                                                              ACTUAL    PRO FORMA     ADJUSTED
                                                                            ----------  ----------  -------------
 

                                                                                       (IN THOUSANDS)
                                                                                           
Capital lease obligations--current portion................................  $      220  $      220    $
Preferred stock, authorized 60,000,000 shares:
    Series A redeemable convertible preferred stock, $.001 par value;
      7,330,000 shares authorized, issued and outstanding (actual); no
      shares authorized, issued or outstanding (pro forma and pro forma as
      adjusted)...........................................................       4,218          --           --
    Series B redeemable convertible preferred stock, $.001 par value;
      8,000,000 shares authorized, issued and outstanding (actual); no
      shares authorized, issued or outstanding (pro forma and pro forma as
      adjusted)...........................................................      12,944          --           --
    Series C redeemable convertible preferred stock, $.001 par value;
      16,666,667 shares authorized, issued and outstanding (actual); no
      shares authorized, issued or outstanding (pro forma and pro forma as
      adjusted)...........................................................      79,332          --           --
Stockholders' (deficit) equity:
    Common stock, $.001 par value; 100,000,000 shares authorized (actual,
      pro forma and pro forma as adjusted); 10,392,000 shares issued and
      outstanding (actual); 42,388,667 shares issued and outstanding (pro
      forma);   shares issued and outstanding pro forma as adjusted.......          10          42
Additional paid in capital................................................      19,563     116,025
Deferred compensation.....................................................      (8,666)     (8,666)
Other comprehensive income................................................         (37)        (37)
Accumulated deficit.......................................................     (54,263)    (54,263)
                                                                            ----------  ----------  -------------
Total stockholders' (deficit) equity......................................     (43,393)     53,101
                                                                            ----------  ----------  -------------
Total capitalization......................................................  $   53,321  $   53,321    $
                                                                            ----------  ----------  -------------
                                                                            ----------  ----------  -------------

 
    The number of shares of common stock to be outstanding after this offering
is based on the number of shares outstanding as of December 31, 1998. It does
not include:
 
    - 6,131,933 shares subject to options outstanding as of December 31, 1998 at
      a weighted average exercise price of $0.81 per share;
 
    - 8,868,067 additional shares that could be issued under our 1998 Stock
      Plan; and
 
    - 7,000,000 additional shares authorized for issuance under our 1998 Stock
      Plan in February 1999.
 
                                       21

                                    DILUTION
 
    Our pro forma net tangible book value as of December 31, 1998 was
approximately $52.9 million, or $1.25 per share of common stock. Pro forma net
tangible book value per share is determined by dividing the amount of our total
tangible assets less total liabilities by the pro forma number of shares of
common stock outstanding at that date, assuming conversion of all outstanding
shares of our convertible preferred stock into common stock. Dilution in net
tangible book value per share represents the difference between the amount per
share paid by purchasers of shares of common stock in this offering made and the
net tangible book value per share of common stock immediately after the
completion of this offering.
 
    After giving effect to the issuance and sale of the shares of common stock
offered by us and after deducting the estimated underwriting discount and
offering expenses payable by us, our pro forma net tangible book value as of
December 31, 1998 would have been $      , or $      per share. This represents
an immediate increase in pro forma net tangible book value of $      per share
to existing stockholders and an immediate dilution of $      per share to new
investors purchasing shares in this offering. If the initial public offering
price is higher or lower, the dilution to the new investors will be greater or
less, respectively. The following table illustrates this per share dilution:
 

                                                                                   
Assumed initial public offering price per share.............................             $
Pro forma net tangible book value per share at December 31, 1998............  $    1.25
Increase in pro forma net tangible book value per share attributable to this
  offering
                                                                              ---------
Pro forma net tangible book value per share after this offering
                                                                                         ---------
Dilution per share to new investors.........................................             $
                                                                                         ---------

 
                            ------------------------
 
    The following table summarizes, on a pro forma basis, as of December 31,
1998, the differences between the number of shares of common stock purchased
from us, the aggregate cash consideration paid to us and the average price per
share paid by existing stockholders and new investors purchasing shares of
common stock in this offering. The calculation below is based on an assumed
initial public offering price of $      per share, before deducting the
estimated underwriting discount and offering expenses payable by us:
 


                                                SHARES PURCHASED          TOTAL CONSIDERATION
                                            -------------------------  -------------------------   AVERAGE PRICE
                                                NUMBER       PERCENT       AMOUNT       PERCENT      PER SHARE
                                            --------------  ---------  --------------  ---------  ---------------
                                                                                   
Existing stockholders.....................      42,388,667          %  $   96,151,000          %     $    2.27
New investors.............................
                                            --------------  ---------  --------------  ---------
    Total.................................                     100.0%  $                  100.0%
                                            --------------  ---------  --------------  ---------
                                            --------------  ---------  --------------  ---------

 
    This discussion and table assume no exercise of any stock options
outstanding as of December 31, 1998. As of December 31, 1998, there were options
outstanding to purchase a total of 6,131,933 shares of common stock with a
weighted average exercise price of $0.81 per share. To the extent that any of
these options are exercised, there will be further dilution to new investors.
Please see "Capitalization".
 
                                       22

                      SELECTED CONSOLIDATED FINANCIAL DATA
 
    The selected consolidated balance sheet data as of December 31, 1997 and
1998 and the selected consolidated statement of operations data for the period
from March 5, 1996 (inception) to December 31, 1996 and the years ended December
31, 1997 and 1998 have been derived from our audited consolidated financial
statements included elsewhere in this prospectus. The selected consolidated
balance sheet data as of December 31, 1996 are derived from our consolidated
audited financial statements not included in this prospectus. The selected
consolidated financial data set forth below should be read in conjunction with
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and the consolidated financial statements and the notes to those
statements included elsewhere in this prospectus.
 


                                                                        PERIOD FROM
                                                                       MARCH 5, 1996
                                                                      (INCEPTION) TO
                                                                       DECEMBER 31,     YEAR ENDED DECEMBER 31,
                                                                      ---------------  -------------------------
                                                                           1996          1997          1998
                                                                      ---------------  ---------  --------------
                                                                                         
                                                                        (IN THOUSANDS, EXCEPT PER SHARE DATA)
CONSOLIDATED STATEMENT OF OPERATIONS DATA:
Revenues............................................................    $        --    $     460  $        5,329
                                                                      ---------------  ---------  --------------
Operating expenses:
  Product and technology development................................             36        1,229           6,816
  Sales and marketing...............................................             12        2,108          29,274
  General and administrative........................................             78          648           4,600
  Depreciation and amortization.....................................              2           38             774
  Stock-based compensation expense..................................             --           --          10,421
                                                                      ---------------  ---------  --------------
    Total operating expenses........................................            128        4,023          51,885
Operating loss......................................................           (128)      (3,563)        (46,556)
  Interest income, net..............................................             --           35             670
                                                                      ---------------  ---------  --------------
Net loss............................................................           (128)      (3,528)        (45,886)
                                                                      ---------------  ---------  --------------
Preferred stock dividends and accretion.............................             --         (185)         (4,536)
Net loss available to common shareholders...........................    $      (128)   $  (3,713) $      (50,422)
                                                                      ---------------  ---------  --------------
                                                                      ---------------  ---------  --------------
Basic and diluted net loss per share................................    $     (0.01)   $   (0.37) $        (4.94)
                                                                      ---------------  ---------  --------------
Shares used in computing basic and diluted net loss per share.......          9,147       10,012          10,202
                                                                      ---------------  ---------  --------------
                                                                      ---------------  ---------  --------------
Pro forma basic and diluted net loss per share......................                              $        (1.09)
                                                                                                  --------------
                                                                                                  --------------
Shares used in computing pro forma basic and diluted net loss per
  share.............................................................                                      42,199
                                                                                                  --------------
                                                                                                  --------------



                                                                                           AS OF DECEMBER 31,
                                                                                    --------------------------------
                                                                                                 
                                                                                      1996       1997        1998
                                                                                    ---------  ---------  ----------
 

                                                                                             (IN THOUSANDS)
                                                                                                 
CONSOLIDATED BALANCE SHEET DATA:
Cash and cash equivalents.........................................................  $     230  $     436  $   53,141
Working capital...................................................................        284        146      47,512
Total assets......................................................................        313        786      60,986
Total current liabilities.........................................................         --        324       7,763
Redeemable convertible preferred stock............................................         --      3,833      96,494
Total stockholders' (deficit) equity..............................................        313     (3,400)    (43,393)

 
                                       23

                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
    THE FOLLOWING DISCUSSION SHOULD BE READ IN CONJUNCTION WITH OUR FINANCIAL
STATEMENTS AND NOTES TO THOSE STATEMENTS AND OTHER FINANCIAL INFORMATION
APPEARING ELSEWHERE IN THIS PROSPECTUS. IN ADDITION TO HISTORICAL INFORMATION,
THE FOLLOWING DISCUSSION AND OTHER PARTS OF THIS PROSPECTUS CONTAIN
FORWARD-LOOKING INFORMATION THAT INVOLVES RISKS AND UNCERTAINTIES. OUR ACTUAL
RESULTS COULD DIFFER MATERIALLY FROM THOSE ANTICIPATED BY SUCH FORWARD-LOOKING
INFORMATION DUE TO THE FACTORS DISCUSSED UNDER "RISK FACTORS" AND ELSEWHERE IN
THIS PROSPECTUS.
 
                                    OVERVIEW
 
    StarMedia is the leading online network across Latin America. At a time when
content on the Internet is overwhelmingly in English, we offer Latin Americans a
pan-regional community experience, combined with a broad array of Spanish and
Portuguese content tailored for regional dialects and local cultural norms. We
also provide advertisers and merchants targeted access to Latin American
Internet users, an audience with a highly desirable demographic profile.
 
    Our network provides 16 interest-specific channels, extensive community
features, sophisticated search capabilities and online shopping in Spanish and
Portuguese. The channels cover topics of interest to Latin Americans online,
such as local and regional news, business and sports. We promote user affinity
to the StarMedia community by providing in-language e-mail, chat rooms, instant
messaging and personal homepages.
 
    We were incorporated in March 1996 and commenced operations in September
1996. For the period from our inception through December 1996, we did not
generate any revenues, incurred minimal operating expenses and focused our
operating activities on the development of the StarMedia network. We launched
our network in December 1996. During 1997, we continued the development of the
StarMedia network and related technology infrastructure and also focused on
recruiting personnel, raising capital and developing content to attract and
retain users. In 1998, we:
 
    - improved and upgraded our services;
 
    - expanded our production staff;
 
    - built a direct sales force; and
 
    - increased our marketing activities in order to build the StarMedia brand.
 
    To date, we have derived substantially all of our revenues from the sale of
advertisements and sponsorships on our network.
 
    Advertising revenues are derived principally from:
 
    - advertising arrangements under which we receive revenues based on a
      cost-per-thousand-impressions basis, commonly referred to as CPMs;
 
    - sponsorship arrangements which allow advertisers to sponsor an area on our
      network in exchange for a fixed payment; and
 
    - design, coordination and integration of content developed under
      advertising and sponsorship arrangements.
 
    Advertising and sponsorship rates depend on:
 
    - whether the impressions are for general audiences or targeted audiences;
 
    - which of the specific channels within the StarMedia network display the
      impressions; and
 
    - the number of guaranteed impressions, if any.
 
    Advertising revenues are recognized ratably in the period in which the
advertisement is displayed, provided that no significant obligations remain and
collection of the resulting receivable is probable. To the extent minimum
guaranteed impression levels are not met, we defer recognition of the
corresponding revenues until guaranteed levels are achieved. Payments received
from advertisers prior to displaying their advertisements on our network are
recorded as deferred revenues. Revenues from sponsorship arrangements are
recognized ratably over the contract term, provided that we have no significant
obligations remaining. Revenue related to the design, coordination and
integration of content under sponsorship arrangements are recognized ratably
over the contract term or using the percentage of
 
                                       24

completion method if the revenue for the services is fixed. Under some of our
content arrangements, we have agreed to pay a portion of the advertising revenue
derived from the related content to the content provider.
 
    We have entered into co-marketing arrangements with various media companies,
including Fox Television and USA Networks. Under these arrangements, we exchange
advertising space on our network predominantly for advertising on television and
radio stations. We entered into these agreements to enhance our marketing
efforts and to extend our marketing presence beyond the ten major markets in
which our paid advertising is concentrated. Revenues and expenses from these
arrangements are recorded at the lower of estimated fair value of the goods or
services received or the estimated fair value of the advertisements given.
Expenses are recorded at the value of the television advertising received when
our advertisements are broadcast, which is typically in the same period as the
advertisements are run on our network. These expenses are included in our sales
and marketing expenses. To date, we have engaged in no barter transactions under
which we have received online advertising.
 
    In addition to advertising revenues, we derive revenues from online commerce
transactions conducted through our network. Revenues from our share of the
proceeds from sales are recognized on notification of sales attributable to our
network. To date, commerce revenues have not been significant. We anticipate
that, although commerce revenues will increase in future periods, the
substantial majority of our revenues will continue to be derived from the sale
of advertising on our network.
 
    We have a limited operating history for you to use as a basis for evaluating
our business. You must consider the risks and difficulties frequently
encountered by early stage companies like us in new and rapidly evolving
markets, including the Internet advertising market. Please see "Risk Factors--We
have only been in business for a short period of time; your basis for evaluating
us is limited".
 
    We have incurred significant net losses and negative cash flows from
operations since our inception. At December 31, 1998, we had an accumulated
deficit of $54.3 million. These losses have been funded primarily through the
issuance of preferred stock. We intend to continue to invest heavily in
marketing and brand development, content enhancements, and technology and
infrastructure development. As a result, we believe that we will continue to
incur net losses and negative cash flows from operations for the foreseeable
future. Moreover, the rate at which these losses will be incurred may increase
from current levels.
 
    We recorded deferred compensation of approximately $19.1 million for the
year ended December 31, 1998, representing the difference between the exercise
price of some stock options granted in 1998 and the fair market value of the
underlying common stock at the date of grant. The difference is recorded as a
reduction of stockholders' equity and amortized over the vesting period of the
applicable options, either immediately or generally three years. Of the total
deferred compensation amount, approximately $10.4 million had been amortized as
of December 31, 1998. In the first quarter of 1999, we expect to record
additional deferred compensation of approximately $2.5 million due to options
granted in this period. This amount will be recorded as a reduction of
stockholders' equity and amortized over the vesting period of the applicable
options, generally three or four years. The amortization of deferred
compensation is recorded as an operating expense. As a result, we currently
expect to amortize the following amounts of deferred compensation annually:
 
    - 1999--$5,246,000;
 
    - 2000--$4,089,000; and
 
    - 2001--$1,908,000.
 
                                       25

                             RESULTS OF OPERATIONS
 
REVENUES
 
    Revenues increased to $5.3 million for the year ended December 31, 1998 from
$460,000 for the year ended December 31, 1997. We did not have any revenue for
the period from March 5, 1996 (inception) to December 31, 1996. The increase in
revenues was primarily due to our ability to generate significantly higher
advertising and sponsorship revenues. During 1998, we:
 
    - expanded our sales force; and
 
    - increased the number of impressions available on our network by adding
      channels and by increasing our marketing efforts.
 
    In 1997, three advertisers each accounted for greater than 10% of total
revenues and the five largest advertisers accounted for 98% of total revenues.
In 1998, two advertisers each accounted for greater than 10% of total revenues
and the five largest advertisers accounted for 62% of total revenues. In 1998,
45% of our total revenues were derived from reciprocal advertising arrangements
with our media partners, which consist primarily of television network
operators. We have not engaged in any barter transactions under which we
received online advertising. Electronic commerce revenues were not material
during these periods.
 
OPERATING EXPENSES
 
    PRODUCT AND TECHNOLOGY.  Product and technology expenses include:
 
    - personnel costs;
 
    - hosting and telecommunications costs; and
 
    - content acquisition fees and revenue sharing arrangements.
 
    Product and technology expenses increased to $6.8 million, or 128% of total
revenues, for the year ended December 31, 1998, from $1.2 million, or 267% of
total revenues, for the year ended December 31, 1997. We incurred $36,000 of
product and technology expenses during 1996. The increase in product and
technology expenses was primarily attributable to increased staffing levels
required to support the StarMedia network and related systems and to enhance the
content and features on the StarMedia network. We have, to date, expensed all
product and technology costs as incurred. We believe that increased investment
in new and enhanced features and technology are critical to attaining our
strategic objectives and remaining competitive. Accordingly, we intend to
continue recruiting and hiring experienced product and technology personnel and
to make additional investments in product development. We expect that product
expenditures will continue to increase in absolute dollars in future periods.
 
    SALES AND MARKETING.  Sales and marketing expenses consist primarily of:
 
    - advertising costs, including the costs of advertisements placed on various
      television networks under our reciprocal advertising arrangements;
 
    - salaries and commissions of sales and marketing personnel;
 
    - public relations costs; and
 
    - other marketing-related expenses.
 
    Sales and marketing expenses increased to $29.3 million, or 549% of total
revenues, for the year ended December 31, 1998, from $2.1 million, or 458% of
total revenues, for the year ended December 31, 1997, and $12,000 during 1996.
The increases in sales and marketing expenses were primarily attributable to:
 
    - expansion of our advertising, public relations and other promotional
      expenditures related to our aggressive branding campaign;
 
    - increased sales commissions as our advertising sales increased; and
 
                                       26

    - higher personnel expenses as we built our sales force.
 
    Sales and marketing expenses as a percentage of total revenues have
increased as a result of the continued development and implementation of
StarMedia's branding and marketing campaign. We expect sales and marketing
expenses will continue to increase in absolute dollars for the foreseeable
future as we:
 
    - continue our branding strategy;
 
    - expand our direct sales force;
 
    - hire additional marketing personnel; and
 
    - increase expenditures for marketing and promotion.
 
    GENERAL AND ADMINISTRATIVE.  General and administrative expenses consist
primarily of:
 
    - salaries and benefits;
 
    - costs for general corporate functions, including finance, accounting and
      facilities; and
 
    - fees for professional services.
 
    General and administrative expenses increased to $4.6 million, or 86% of
total revenues, for the year ended December 31, 1998, from $648,000, or 141% of
total revenues, for the year ended December 31, 1997, and $78,000 during 1996.
The increase in general and administrative expenses was primarily due to
increased salaries and related expenses associated with the hiring of additional
personnel and increases in professional fees to support the growth of our
business. General and administrative expenses decreased on a percentage basis
because of the growth in revenues. We expect that we will incur additional
general and administrative expenses as we hire additional personnel and incur
additional costs related to the growth of our business and our operation as a
public company. Accordingly, we anticipate that general and administrative
expenses will continue to increase in absolute dollars in future periods.
 
DEPRECIATION AND AMORTIZATION
 
    Depreciation and amortization expenses increased to $774,000, or 15% of
revenues, for the year ended December 31, 1998, from $38,000, or 8% of revenues,
for the year ended December 31, 1997 and from $2,000 during 1996. The dollar
increases were primarily attributable to the increase in fixed assets of
approximately $5.8 million during 1998 and $270,000 during 1997.
 
STOCK-BASED COMPENSATION EXPENSE
 
    We recorded deferred compensation of $19.1 million during the year ended
December 31, 1998. Of this amount, $10.4 million is being recorded as an expense
in 1998. The remainder is being amortized over the vesting period for the
individual options, which are typically three years.
 
INTEREST INCOME, NET
 
    Interest income, net includes income from our cash and investments. Interest
income, net increased to $670,000 for the year-ended December 31, 1998 from
$35,000 for the year ended December 31, 1997. We did not record any interest
income, net during 1996. The increase in interest income was primarily due to
higher average cash, cash equivalent and investment balances as a result of
capital received from the sale of preferred stock in the first and third
quarters of 1998.
 
                        QUARTERLY RESULTS OF OPERATIONS
 
    The following table sets forth unaudited quarterly statement of operations
data for each of the four quarters ended December 31, 1998. In the opinion of
management, this information has been prepared substantially on the same basis
as the audited financial statements appearing elsewhere in this prospectus, and
all necessary adjustments, consisting only of normal recurring adjustments, have
been included in the amounts stated below to present fairly the unaudited
quarterly results of operations data. The quarterly data should be read with our
consolidated financial statements and the notes to those statements appearing
elsewhere in this prospectus. The operating
 
                                       27

results for any quarter are not necessarily indicative of the operating results
for any future period. In particular, because of our limited operating history,
we have limited meaningful financial data to estimate revenues and operating
expenses. In addition, we believe that we will continue to experience
seasonality in our business, with use of our network being lower during the
Latin American summer vacation period in the first calendar quarter of the year.
This may adversely affect our advertising revenue during the first calendar
quarter.


                                                                                 THREE MONTHS ENDED
                                                               ------------------------------------------------------
                                                               MARCH 31,    JUNE 30,   SEPTEMBER 30,    DECEMBER 31,
                                                                  1998        1998          1998            1998
                                                               ----------  ----------  --------------  --------------
                                                                                           
                                                                                 (IN THOUSANDS)
 

                                                                                           
Revenues.....................................................  $      256  $      589    $    1,308     $      3,176
Operating expenses:
  Product and technology development.........................         794       2,384         1,552            2,086
  Sales and marketing........................................       1,816       4,199         7,725           15,534
  General and administrative.................................         450         574           857            2,719
                                                               ----------  ----------  --------------  --------------
  Depreciation and amortization..............................          79         169           204              322
  Stock-based compensation expense...........................           2       3,248           666            6,505
                                                               ----------  ----------  --------------  --------------
    Total operating expenses.................................       3,141      10,574        11,004           27,166
                                                               ----------  ----------  --------------  --------------
Loss from operations.........................................      (2,885)     (9,985)       (9,696)         (23,990)
                                                               ----------  ----------  --------------  --------------
 
Net loss.....................................................  $   (2,857) $   (9,922)   $   (9,624)    $    (23,483)
                                                               ----------  ----------  --------------  --------------

 
LIQUIDITY AND CAPITAL RESOURCES
 
    To date, we have primarily financed our operations through the sale of our
preferred stock. As of December 31, 1998, we had approximately $53.1 million in
cash and cash equivalents.
 
    Net cash used in operating activities was $30.6 million for the year ended
December 31, 1998, $3.3 million for the year ended December 31, 1997 and
$127,000 for 1996. To date, we have experienced significant negative cash flows
from operating activities. Net cash used in operating activities resulted
primarily from our net operating losses, offset by:
 
    - the amortization of deferred compensation;
 
    - depreciation and amortization;
 
    - increases in accounts payable and accrued expenses; and
 
    - deferred revenues.
 
    Net cash used in investing activities was $4.6 million for the year ended
December 31, 1998, $280,000 for the year ended December 31, 1997 and $30,000
during 1996. Net cash used in investing activities during 1996, 1997 and 1998
resulted primarily from the purchase of fixed assets.
 
    Net cash provided by financing activities was $88 million for the year ended
December 31, 1998, $3.8 million for the year ended December 31, 1997 and
$387,000 during 1996. Net cash provided by financing activities during 1997 and
1998 consisted primarily of proceeds from the sale of preferred stock.
 
    Our principal commitments consist of obligations outstanding under capital
and operating leases. As of December 31, 1998, we have spent approximately $5.8
million on capital expenditures, excluding capital lease arrangements. We expect
our capital expenditures will increase significantly in the future as we make
technological improvements to our system and technical infrastructure.
 
    Our capital requirements depend on numerous factors, including:
 
                                       28

    - market acceptance of our services;
 
    - the amount of resources we devote to investments in the StarMedia network;
 
    - marketing and selling our services; and
 
    - promoting our brand.
 
    We have experienced a substantial increase in our capital expenditures and
operating lease arrangements since our inception consistent with the growth in
our operations and staffing. We anticipate that this will continue for the
foreseeable future. Additionally, we will continue to evaluate possible
investments in businesses, products and technologies, and plan to expand our
sales and marketing programs and conduct more aggressive brand promotions.
 
    We believe that the net proceeds from this offering, together with our
current cash and cash equivalents, will be sufficient to meet our anticipated
cash needs for working capital and capital expenditures for at least the next 12
months. If cash generated from operations is insufficient to satisfy our
liquidity requirements, we may seek to sell additional equity or debt securities
or to obtain a credit facility. The sale of additional equity or convertible
debt securities could result in additional dilution to our stockholders. The
incurrence of indebtedness would result in increased fixed obligations and could
result in operating covenants that would restrict our operations. We cannot
assure you that financing will be available in amounts or on terms acceptable to
us, if at all. Please see "Risk Factors--We may have difficulty obtaining
additional capital if needed".
 
                              YEAR 2000 COMPLIANCE
 
    The Year 2000 issue is the potential for system and processing failures of
date-related data and the result of computer-controlled systems using two digits
rather than four to define the applicable year. For example, computer programs
that have time-sensitive software may recognize a date using "00" as the year
1900 rather than the year 2000. This could result in system failure or
miscalculations causing disruptions of operations, including, among other
things, a temporary inability to process transactions, send invoices or engage
in similar normal business activities.
 
STATE OF READINESS
 
    We may be affected by Year 2000 issues related to non-compliant information
technology, or IT, systems or non-IT systems operated by us or by third parties.
We have substantially completed an assessment of our internal and third-party IT
systems and non-IT systems. At this point in our assessment, we are not
currently aware of any Year 2000 problems relating to systems operated by us or
by third parties that would have a material effect on our business, results of
operations or financial condition, without taking into account our efforts to
avoid such problems.
 
    Our IT systems consist of third-party and internally modified public domain
and open-source software, and hardware purchased from vendors. We have contacted
our principal vendors of hardware and software. All of those contacted vendors
have notified us that the hardware and software that they have supplied to us is
Year 2000 compliant.
 
    We have also substantially completed an assessment of our non-IT systems
which we have identified as containing embedded chip systems for Year 2000
issues. At this point in our assessment, we are not currently aware of any Year
2000 problems relating to these systems which would have a material effect on
our business, results of operations, or financial condition, without taking into
account our efforts to avoid such problems.
 
    Our IT systems and other business resources rely on IT systems and non-IT
systems provided by service providers and therefore may be vulnerable to those
service providers' failure to remediate their own Year 2000 issues. Such service
providers include those for StarMedia's network and e-mail services and
landlords for our leased office spaces. We have contacted these principal
service providers and have been notified that the IT and non-IT systems which
they provide to us are Year 2000 compliant.
 
                                       29

COSTS
 
    Based on our assessment to date, we do not anticipate that costs associated
with remediating our non-compliant IT systems or non-IT systems will be
material.
 
RISKS
 
    To the extent that our assessment is finalized without identifying any
additional material non-compliant IT systems operated by us or by third parties,
the most reasonably likely worst case Year 2000 scenario is a systemic failure
beyond our control, such as a prolonged telecommunications or electrical
failure. Such a failure could prevent us from operating our business, prevent
users from accessing our Web site, or change the behavior of advertising
customers or persons accessing our Web site. We believe that the primary
business risks, in the event of such failure, would include but not be limited
to, lost advertising revenues, increased operating costs, loss of customers or
persons accessing our Web site, or other business interruptions of a material
nature, as well as claims of mismanagement, misrepresentation, or breach of
contract.
 
CONTINGENCY PLAN
 
    As discussed above, we are engaged in an ongoing Year 2000 assessment.
Following the completion of the assessment, we plan to conduct a full-scale Year
2000 simulation of our IT systems. The results of this simulation and our
assessment will be taken into account in determining the nature and extent of
any contingency plans.
 
FORWARD-LOOKING STATEMENTS
 
    The Year 2000 discussion above is provided as a "Year 2000 Readiness
Disclosure" as defined in the Year 2000 Information and Readiness Disclosure Act
of 1998 (Public Law 105-271, 112 Stat. 2386) enacted on October 19, 1998 and
contains forward-looking statements. These statements are based on management's
best current estimates, which were derived from a number of assumptions about
future events, including the continued availability of resources,
representations received from third parties and other factors. However, we
cannot assure you that these estimates will be achieved, and our actual results
could differ materially from those anticipated. Specific factors that might
cause material differences include:
 
    - the ability to identify and remediate all relevant systems;
 
    - results of Year 2000 testing;
 
    - adequate resolution of Year 2000 issues by governmental agencies,
      businesses and other third parties who are our outsourcing service
      providers, suppliers, and vendors;
 
    - unanticipated system costs; and
 
    - our ability to implement adequate contingency plans.
 
    The forward-looking statements made in the Year 2000 discussion above relate
only to events as of the date on which the statements are made. We undertake no
obligation to update any forward-looking statement to reflect events or
circumstances after the date on which the statement is made or to reflect the
occurrence of unanticipated events.
 
                         INFLATION AND FOREIGN CURRENCY
                              EXCHANGE RATE LOSSES
 
    To date, our results of operations have not been impacted materially by
inflation in the U.S. or in the countries that comprise Latin America.
 
    Although a substantial portion of our revenues are denominated in U.S.
dollars, an increasing percentage of our revenues are denominated in foreign
currencies. As a result, our revenues may be impacted by fluctuations in these
currencies and the value of these currencies relative to the U.S. dollar. In
addition, a portion of our monetary assets and liabilities and our accounts
payable and operating expenses are denominated in foreign currencies. Therefore,
we are exposed to foreign currency exchange risks. To date, we have not tried to
reduce our exposure to exchange rate fluctuations by using hedging
 
                                       30

transactions. However, we may choose to do so in the future. We may not be able
to do this successfully. Accordingly, we may experience economic loss and a
negative impact on earnings and equity as a result of foreign currency exchange
rate fluctuations.
 
                        RECENT ACCOUNTING PRONOUNCEMENTS
 
    We adopted the provisions of Statement of Financial Accounting Standards
("SFAS") No. 130, "Reporting Comprehensive Income" as of January 1, 1998. SFAS
No. 130 requires us to report in our financial statements, in addition to our
net income (loss), comprehensive income (loss), which includes all changes in
equity during a period from non-owner sources including, as applicable, foreign
currency items, minimum pension liability adjustments and unrealized gains and
losses on certain investments in debt and equity securities.
 
    In June 1997, the Financial Accounting Standards Board ("FASB") issued SFAS
No. 131, "Disclosure About Segments of an Enterprise and Related Information".
SFAS No. 131 establishes standards for the way that public business enterprises
report information about operating segments. It also establishes standards for
related disclosures about products and services, geographic areas and major
customers. SFAS No. 131 is effective for fiscal years beginning after December
15, 1997. We have determined that we do not have any separately reportable
business segments.
 
    In June 1998, the FASB issued SFAS No. 133, "Accounting for Derivative
Instruments and Hedging Activities". SFAS No. 133 establishes accounting and
reporting standard for derivative instruments, including derivative instruments
embedded in other contracts, and for hedging activities. SFAS No. 133 is
effective for all fiscal quarters of fiscal years beginning after June 15, 1999.
The statement is not expected to affect us as we currently do not have any
derivative instruments or hedging activities.
 
                                       31

                                    BUSINESS
 
                                    OVERVIEW
 
    StarMedia is the leading online network across Latin America. At a time when
content on the Internet is overwhelmingly in English, we offer Latin Americans a
large pan-regional community experience, combined with a broad array of Spanish
and Portuguese content tailored for regional dialects and local cultural norms.
We also provide advertisers and merchants targeted access to Latin American
Internet users, an audience with a highly desirable demographic profile.
 
    Our network provides 16 interest-specific channels, extensive community
features, sophisticated search capabilities and online shopping in Spanish and
Portuguese. The channels cover topics of interest to Latin Americans online,
such as local and regional news, business and sports. We promote user affinity
to the StarMedia community by providing in-language e-mail, chat rooms, instant
messaging and personal homepages.
 
                              INDUSTRY BACKGROUND
 
THE GROWTH OF THE INTERNET AND ONLINE ADVERTISING AND COMMERCE
 
    The Internet has developed into a significant global mass medium that allows
millions of people worldwide to find information, interact with others and
conduct business electronically. International Data Corporation, or IDC,
estimates that the number of Internet users worldwide will grow from
approximately 97 million at the end of 1998 to approximately 320 million by the
end of 2002. The Internet has also emerged as an attractive new medium for
advertisers. The Internet allows advertisers to target desired demographic
groups or consumers in specific geographic locations. It also allows them to
interact more effectively with consumers and capture valuable data about buying
patterns, preferences and demands. According to Jupiter Communications, the
dollar value of Internet advertising in the U.S. is expected to increase from
$1.9 billion in 1998 to approximately $7.7 billion in 2002, representing a
compound annual growth rate of 42%. The growth in the use of the Internet is
also providing businesses with a platform to conduct electronic commerce.
According to IDC, consumer transactions on the Internet are expected to increase
from $11.3 billion in 1998 to approximately $93.7 billion in 2002, representing
a compound annual growth rate of 70%.
 
INTERNET USE IN LATIN AMERICA
 
    Latin America is comprised of 23 countries with a total population of
approximately 490 million people. Although divided by geographical and political
boundaries, Latin Americans share many cultural affinities, including common
languages and religions, as well as a similar heritage. A majority of Latin
Americans speak Spanish or Portuguese, with only a small portion of the
population being proficient in English. The Latin American population is also
relatively young. For example, about 65% of the population in Mexico is under
the age of 30 and over 40% of the population in Brazil is under the age of 20.
 
    A substantial portion of the buying power in Latin America is concentrated
within 20% of the population, according to Strategic Research Corporation. This
group of approximately 100 million people controls an estimated 65% of the
overall buying power in Latin America and enjoys a standard of living comparable
to the populations of Germany and Great Britain. As a result of these factors,
the Latin American market represents a highly desirable demographic profile for
advertisers and businesses. According to a study conducted in December 1998 by
Zenith Media, overall advertising spending across all media in Latin America was
$27 billion in 1998 and is estimated to grow to $34 billion in 2001.
 
    Internet use in Latin America has grown significantly in recent years and,
according to Nazca Saatchi & Saatchi, is expected to significantly outpace
growth in worldwide Internet usage over the next several years. According to
Nazca Saatchi & Saatchi, the number of Internet users in Latin America is
expected to increase from 7 million users in
 
                                       32

1997 to 34 million users by the end of 2000. According to Nazca Saatchi &
Saatchi, approximately 90% of these users are from upper and middle
socio-economic classes.
 
    The following factors have contributed to the growth in Internet use in
Latin America:
 
    - increased use of personal computers, particularly among affluent Latin
      Americans;
 
    - network infrastructure improvements accelerated by privatization of
      telecommunications providers and increased spending;
 
    - the relative youth of the Latin American population and their tendency to
      use new technologies, like the Internet;
 
    - reduced Internet access costs; and
 
    - increased awareness of the Internet.
 
NEED FOR A LATIN AMERICAN ONLINE NETWORK
 
    Despite the rapid growth of non-English speaking Internet users worldwide,
more than 80% of the content on the Internet remains in English. We believe that
an increasing number of Latin American Internet users are seeking a full-service
Internet destination site in their local language that provides them with:
 
    - a social interactive experience across the entire Spanish and Portuguese
      speaking world;
 
    - a variety of in-depth and focused local content;
 
    - a broad array of compelling content at the regional and international
      level; and
 
    - sophisticated Internet applications and tools like e-mail, chat, instant
      messaging, bulletin boards, personal homepages and search capabilities.
 
    To date, few Internet sites have been tailored specifically to the interests
and needs of Latin Americans. In an attempt to address this need, some of the
English language general destination sites have translated a small portion of
their content into Spanish or Portuguese. To date, however, these sites, have
been generally focused on expanding into the European and Asian markets. As a
result, they typically do not extend their Spanish and Portuguese translations
beyond selected topical content and do not provide in-depth local content or
in-language applications for Latin Americans. Furthermore, they do not tailor
their translations and content to take into account regional dialects, language
differences or local cultural norms.
 
    Some regional sites attempt to provide content for the populations of
specific cities or countries in the local dialect. These sites, while providing
Spanish or Portuguese content, have a limited community of users and do not
provide extensive regional or global content. There are also Spanish or
Portuguese language interest-specific sites, like sports sites. These sites
offer in-depth content, but are limited to only one topic.
 
    We believe that few of these Spanish and Portuguese language sites attract a
broad user audience. Therefore, they cannot provide advertisers with an
attractive platform to effectively reach the highly desirable Latin American
Internet user demographics.
 
THE STARMEDIA SOLUTION
 
    We are the leading online network across Latin America. We provide original
and third-party branded content through sixteen interest-specific channels,
extensive community features and sophisticated search capabilities in Spanish
and Portuguese. We believe that we have created an online network that uniquely
addresses the needs of Latin American Internet users and provides advertisers
and merchants with a highly desirable platform for targeting affluent Latin
American consumers. Our monthly page views have grown from approximately 7
million in December 1997 to approximately 61 million in December 1998, which
represented approximately 2.4 million user visits in that month. In addition, as
of December 31, 1998, we had over 300,000 registered e-mail users.
 
    We believe that our success to date is attributable to the following key
factors:
 
    FOCUS ON LATIN AMERICA.  We serve the interests and needs of Latin American
Internet users and have developed both a product and
 
                                       33

a business infrastructure to support our focus on this market. We designed our
network around the needs of our users, providing them with:
 
    - customized global, regional and local content covering a variety of topics
      in the appropriate Spanish and Portuguese dialects based on the
      self-reported geographic location of our users;
 
    - a broad range of in-language community features, like chat, bulletin
      boards, free e-mail, personal homepages, and personal and classified ads,
      that allow users to interact with other Latin Americans with similar
      interests;
 
    - an easy-to-use interface and a consistent navigation experience that
      facilitates usage by the growing number of Latin Americans coming online
      for the first time; and
 
    - search capabilities that can be customized by country, region and/or
      language.
 
    In addition, we have developed a business infrastructure designed to address
the needs of our Latin American users by maintaining a strong local presence
throughout Latin America and employing a high percentage of Latin Americans both
in the U.S. and abroad. These are critical to maintaining our network's Latin
American focus and flavor.
 
    Our Latin American employees provide us with important cultural and
linguistic insights. Our local presence allows us to better understand the needs
of local advertisers and businesses, and to maintain strong relationships with
local advertisers and businesses. We have sales offices throughout Latin America
in Sao Paulo, Mexico City, Buenos Aires, Bogota, Santiago, Caracas and
Montevideo. Each office is staffed predominantly with sales people from the
country in which the office is located.
 
    MARKET LEADERSHIP THROUGH BRAND DEVELOPMENT.  We believe that StarMedia is
the most recognized Internet brand in Latin America. As a result, visiting the
StarMedia network is one of the first Internet experiences for many Latin
Americans. We began our marketing efforts in February 1997 and were the first
online network to make a significant investment in brand development in Latin
America. We believe that many of our regular users first visited our network in
response to our marketing efforts. We have continued to invest heavily in
building the StarMedia brand through our extensive marketing, advertising and
public relations programs. Our brand recognition has enabled us to attract a
growing user audience and leading companies as advertisers and electronic
commerce partners.
 
    EXTENSIVE LOCAL CONTENT AND BROAD PAN-REGIONAL COMMUNITY STRUCTURE.  We
believe that our extensive local content combined with our pan-regional
community offering gives us a competitive advantage and is key to our continued
leadership as the Internet destination of choice across Latin America. We
provide our users with a broad array of relevant and in-depth local content. In
addition, our users throughout Latin America can use our network as a virtual
central plaza to meet other Latin Americans, access region-specific information
and conduct electronic commerce across boundaries. Our pan-regional community
enables us to achieve a critical mass of users in order to provide a richer
Internet experience for Latin Americans throughout the region.
 
    DEDICATION TO USER CARE.  We believe that high quality user care and
technical support are essential to our continued success and brand development
efforts. To further enhance our users' experience and to foster user loyalty, we
have local user care support teams that rapidly respond to e-mail inquiries and
provide in-language technical advice, 24 hours a day, seven days a week. We also
proactively solicit feedback from our users in order to understand their
preferences and to enhance their experience on our network. For example, in
order to better understand the demands of our users, we have developed a special
EU QUERO/LO QUIERO, or "I Want It", area which is accessible from every page on
our network. This feature enables our users to make requests for additions or
modifications to the network.
 
                                       34

    HIGHLY ATTRACTIVE PLATFORM FOR ADVERTISING AND COMMERCE.  We believe that
the StarMedia network is a highly attractive platform for advertisers and
businesses because it gives them access to:
 
    - the leading Internet brand in Latin America;
 
    - a highly desirable user demographic profile; and
 
    - users with a high degree of affinity and involvement through e-mail, chat,
      bulletin boards and personal homepages.
 
    Internet advertising is new to Latin America, and we believe that buying
advertising on the StarMedia network is often one of the first Internet
advertising purchases made by businesses and advertising agencies in Latin
America. Accordingly, we have created an advertising environment that fosters
advertiser use of this new medium and solidifies our relationship with
advertisers. We have developed a client services team that is dedicated to
enhancing our relationship with these advertisers and maximizing the
effectiveness of their advertising campaigns. We use our knowledge about the
needs and sensitivities of our user base to help advertisers create more
effective advertising campaigns. In addition, we use leading advertising
techniques and tracking technologies to:
 
    - target advertising to users with specific demographic profiles;
 
    - gather extensive data to create an intelligence profile for each campaign;
      and
 
    - use daily tracking data to analyze the campaign's effectiveness.
 
    As a result, we provide advertisers with detailed and timely feedback on the
effectiveness of campaigns, as well as recommendations on how to improve their
campaigns. We believe that our client services group is a key differentiator
from other Latin American web sites and provides us with a significant
competitive advantage.
 
    As a result, we have been able to:
 
    - attract high-profile advertisers, including Bradesco, Ford, Fox
      Television, IBM, Microsoft, Motorola, Nokia and Sony;
 
    - enter into relationships with leading electronic commerce companies,
      including barnesandnoble.com, Citibank, Outpost.com, Disney, and N2K; and
 
    - charge premium advertising rates.
 
STRATEGY
 
    Our objective is to strengthen our position as the leading online network
across Latin America. In order to accomplish this, we will:
 
    AGGRESSIVELY EXTEND OUR BRAND RECOGNITION.  Our goal is to make the
StarMedia brand synonymous with the Internet in Latin America. We believe that
continuing to enhance our brand recognition will enable us to capitalize on our
leading position in Latin America and will make us more attractive to
advertisers and businesses conducting electronic commerce. This will increase in
importance as more Latin American consumers move online and as additional
Internet sites compete for these users.
 
    We intend to continue to build our brand through:
 
    - extensive television, print, Internet and outdoor advertising;
 
    - public relations programs;
 
    - conference sponsorships;
 
    - new strategic alliances; and
 
    - additional distribution relationships.
 
    ENHANCE AND EXPAND OUR NETWORK.  We intend to continue to add new content
and features to the StarMedia network. We believe that this will:
 
    - further differentiate our network from competing sites;
 
    - provide users with a more comprehensive and satisfying Internet
      experience; and
 
    - result in users visiting the StarMedia network more often and remaining
      there longer.
 
                                       35

    In 1998, we added 9 new channels to our network and expect to add a number
of other new channels in 1999. We currently have relationships with leading
content providers, including Fox Television, Internet Securities, Quote.com,
Reuters, WeatherLabs, and Ziff-Davis. We are aggressively seeking new content
relationships in order to further increase the breadth and depth of our content
and community features without incurring significant additional costs. We
currently have more than 70 employees in our content development group who are
responsible for gathering, developing and designing our content. We intend to
further enlarge this group.
 
    We are also expanding our country-specific content to further penetrate
local markets. We are aggressively seeking to enter into partnerships with
leading local interest-specific content providers. We also intend to continue to
license and customize new technologies for our network in order to further
enhance its features and functions.
 
    DELIVER SUPERIOR NETWORK FUNCTIONALITY AND SPEED.  We continually seek to
improve the speed and functionality of our network by developing and
implementing leading technologies. We believe that establishing our headquarters
in New York has enabled us to remain abreast of leading Internet technologies
and trends. We are developing an innovative distributed server capability to
meet the needs of our users across Latin America. We recently installed remote
network operating centers in Brazil and Argentina. These facilities allow us to
serve ads and cached content locally. This increases the speed with which we can
deliver content to our users. We intend to install additional operating centers
across the region and develop additional technologies to increase the efficiency
of these local systems. In addition, we intend to develop a fully distributed
content delivery platform, which will enable all of our content and features to
be delivered from local servers. This new distributed platform will increase the
speed and quality of service for users in key markets and will differentiate us
by our ability to deliver common content more quickly across a wide array of
geographic locations. In addition, this will also allow our advertisers to more
effectively reach their target audience.
 
    EXPAND INTO ADDITIONAL SPANISH- AND PORTUGUESE-SPEAKING MARKETS.  We seek to
make StarMedia the first and most frequent destination on the Internet for the
Spanish- and Portuguese-speaking population worldwide. We believe there is a
significant opportunity for a Spanish and Portuguese language online network
that extends beyond Latin America to include Spain, the United States and
Portugal. There are approximately 7.4 million Spanish and Portuguese-speaking
Internet users dispersed through the United States, Spain and Portugal. The
Hispanic population is growing more rapidly than any other minority group within
the U.S. population. According to the Tomas Rivera Policy Institute at Claremont
University, from 1994 to 1998, Internet usage by U.S. Hispanics grew 800%.
Forrester Research Inc. estimates that by the end of 1999, 43% of U.S. Hispanics
will be online. We believe that Hispanic Americans are increasingly using our
network to maintain their cultural identities and to communicate with friends
and family in Latin America and elsewhere.
 
    As the number of Spanish- and Portuguese-speaking Internet users outside
Latin America increases, advertisers and electronic commerce marketers will
increasingly seek an effective means to reach these audiences. To take advantage
of these opportunities, we are expanding our advertising and marketing campaigns
in the United States and Spain. In addition, we intend to expand our presence in
Spain by opening a local office.
 
                                       36

                             THE STARMEDIA NETWORK
 
    The StarMedia network is currently organized around 16 channels. These
channels are grouped into (1) community services and (2) content and commerce
services. Our Welcome Screen--www.starmedia.com--is the gateway to our network.
It provides a guide to the network channels, features special content and
promotions, offers direct access to the search, e-mail and chat services and
displays real-time news headlines. When users first visit the StarMedia network
they are prompted to indicate what country they are from and whether they prefer
to receive content in Spanish or Portuguese. This information allows us to
target both content and advertising by subject matter and dialect. Our unique
design and layout provides a consistent navigation experience allowing users to
access any channel on our network from any other channel on the service.
Additionally, this design allows for persistent branding throughout the network.
The following is a description of the StarMedia network.
 
COMMUNITY SERVICES
 


CHANNEL                           DESCRIPTION
- --------------------------------  --------------------------------------------------------------------------------
                               
 
STARMEDIA TALKPLANET (CHAT)       StarMedia TalkPlanet is our chat community and the foundation of our network.
                                  TalkPlanet creates "virtual communities" where participants can interact in
                                  real-time groups or one-on-one discussions in both Spanish and Portuguese. These
                                  communities include broad interest areas like sports, romance and current
                                  events. Our users can host their own scheduled chats, create their own
                                  interest-specific rooms or participate in moderated celebrity events.
 
STARMEDIA MAIL                    StarMedia Mail is our free Web-based e-mail service and is offered in both
(E-MAIL)                          Spanish and Portuguese. We have over 300,000 registered e-mail users. StarMedia
                                  Mail allows users to access electronic mail from any computer with a standard
                                  Web browser. We believe that providing this service increases user loyalty and
                                  therefore, increases traffic on our network. We have also developed a series of
                                  "I-mails", which are interactive greeting cards that users can send to friends
                                  and family members.
 
STARMEDIA ORBITA/ORBITA           StarMedia Orbita/Orbita enables users to create personalized Web pages on the
(PERSONAL HOMEPAGES)              StarMedia network. Using a variety of proprietary publishing tools in Spanish
                                  and Portuguese, users are able to quickly and easily create fully personalized
                                  homepages. Individual homepages reside in designated communities of interest
                                  like family, business and technology. We believe that users will be more
                                  attracted to our network when they can publish content and share experiences
                                  with others through their personalized homepages.
 
QUADRO DE AVISOS/ PIZARRAS        Our bulletin board area--Quadro de Avisos/Pizarras--further enhances user
(BULLETIN BOARDS)                 interaction. From politics and religion to music and travel, this user-generated
                                  content augments each channel and maintains a record of ongoing communication
                                  about a particular topic on the our network.

 
                                       37



CHANNEL                           DESCRIPTION
- --------------------------------  --------------------------------------------------------------------------------
                               
STARMEDIA EXPRESS (INSTANT        This instant messaging service enables users to know whether their friends and
MESSENGER)                        other users with similar interests are online and to send messages directly to
                                  them. Our partnership with PeopleLink enables users to subscribe to specific
                                  interest groups and communicate with people from around the world who share
                                  similar interests.
 
STARMEDIA CLASSIFICADOS/          StarMedia Classificados/Clasificados is our classifieds marketplace, spanning
STARMEDIA CLASIFICADOS            numerous product and service areas from electronics to real estate. Buyers and
(CLASSIFIEDS)                     sellers from across Latin America can trade timely information on goods and
                                  services.
 
NAMORO PERSONET/ ROMANCE          Namoro Personet/Romance Personet is an interactive meeting place for visitors in
PERSONET (PERSONALS)              search of new friends and relationships. Personet connects people from a wide
                                  range of interests, backgrounds and origins. On Personet, people meet in a
                                  variety of ways, including through personal ad postings and in discussion
                                  forums.

 
CONTENT AND COMMERCE SERVICES
 
    We have built our content and commerce services around our successful
community environment. We enhance the effectiveness of our community services by
wrapping them around engaging content like information, news, entertainment and
shopping.
 


CHANNEL                           DESCRIPTION
- --------------------------------  --------------------------------------------------------------------------------
                               
 
STARMEDIA NOTICIAS/ NOTICIAS      StarMedia Noticias/Noticias delivers a comprehensive selection of international,
(NEWS)                            regional and local news. Content for news and all information services is
                                  provided by top syndicated wire services, local partnerships and by our team of
                                  editors, producers and writers throughout Latin America. Users can react to the
                                  latest headlines through chats, debates and polls. Our partners include Reuters,
                                  Agencia EFE and Agence France Presse.
 
STARMEDIA ESPORTES/ DEPORTES      Through the StarMedia Esportes/Deportes channel, we provide comprehensive local,
(SPORTS)                          regional and global sports news and information. Users can access headlines,
                                  results, commentary, analysis and daily polls. They can also purchase
                                  merchandise and win prizes through our interactive games. In addition, we are
                                  the exclusive webcaster of FUTBOL DE PRIMERA, the world's most popular
                                  syndicated radio talk show about soccer, hosted by Andres Cantor.
 
STARMEDIA MONEY (FINANCE)         StarMedia Money provides online financial news and information. In addition,
                                  users can obtain research about top Latin American companies, access information
                                  on personal banking products and services, and track their individual investment
                                  portfolios in Spanish and Portuguese. Information is provided by a host of
                                  leading financial information publishers, including Avance Economico, Enfoque,
                                  El Economista, El Universal and Quote.com.
 
STARMEDIA DIGITAL (TECHNOLOGY)    StarMedia Digital offers the latest in technology news, product reviews and free
                                  downloads from ZDNet. The information provided by ZDNet helps users make
                                  informed buying decisions about technology products, which they can purchase
                                  through StarMedia's relationship with vendors like Outpost.com.

 
                                       38



CHANNEL                           DESCRIPTION
- --------------------------------  --------------------------------------------------------------------------------
                               
STARMEDIA ENTRETENIMENTO/         Entertainment and music are united in the StarMedia Entretenimento/
ENTRETENIMIENTOS (ENTERTAINMENT)  Entretenimientos channel. Our partnerships with USA Networks, Fox Latin America,
                                  eDrive, Retila, Successo CD and N2K provide content that creates a bridge
                                  between online and traditional programming. (V)Pulse offers a popular selection
                                  of easily playable music videos. StarMedia TV and StarMedia Radios provide
                                  Internet broadcasts of popular television and radio stations from Latin America
                                  and around the world.
 
STARMEDIA SHOPPING (ELECTRONIC    StarMedia Shopping acts as a virtual central plaza for online Latin American
COMMERCE)                         consumers. Users are able to purchase a variety of merchandise, including
                                  computers, books and CDs, from a host of global and local retailers like
                                  barnesandnoble.com, N2K, CIM and Outpost.com. Products from the StarMedia
                                  Shopping channel are also merchandised within appropriate channels. For example,
                                  there are direct links that allow a literary chat group to easily purchase books
                                  of interest from barnesandnoble.com.
 
STARMEDIA BUSCAWEB (SEARCH AND    StarMedia BuscaWeb is our Internet search engine with in-language functionality.
GUIDE)                            It utilizes Inktomi's sophisticated search capabilities, which have been
                                  customized to support country-specific, regional and worldwide searches in both
                                  Spanish and Portuguese.
 
STARMEDIA VIAGENS/VIAJES          The travel channel offers travel guides and news through an exclusive
(TRAVEL)                          relationship with Lonely Planet, as well as advice about preparing for a trip,
                                  links to travel resources on the Web and a forum for exchanging travel stories
                                  and tips.
 
STARMEDIA TEMPO/TIEMPO (WEATHER)  StarMedia Tempo/Tiempo provides up-to-the-minute weather conditions and extended
                                  forecasts for 3,000 cities around the globe.

 
                              STRATEGIC ALLIANCES
 
    We have developed strategic relationships with leading content, electronic
commerce, syndication and application partners. Many of these relationships
provide us with exclusive rights for the Spanish and Portuguese market and are
designed to:
 
    - enhance our network;
 
    - expand our community of users;
 
    - increase traffic; and
 
    - provide us with additional revenues.
 
    Generally, content partnerships are revenue sharing relationships. Our
commerce partners typically pay us an advertisement placement or sponsorship fee
and share with us a percentage of transaction revenues generated through our
network.
 
    CONTENT AND APPLICATION PROVIDERS.  We have a number of relationships with
leading content and application providers, including:
 
    - Agence France Press--news and sports information
 
    - Bottle Rocket--interactive sports games
 
    - BusinessWire--business news
 
    - Critical Path--email services
 
    - edrive--entertainment news and featured content
 
    - eShare--chat software
 
    - Agencia EFE--news and information
 
    - Futbol de Primera--soccer Webcasts
 
    - Inktomi--in-language search services
 
    - Internet Securities--local business news for major Latin American cities
      provided by leading publishers, including Avance
 
                                       39

      Economico, El Economista, El Universal and Enfoque
 
    - Lonely Planet--travel information
 
    - PeopleLink--instant messaging
 
    - Quote.com--stock and mutual fund quotes
 
    - Reuters--news and sports information
 
    - WeatherLabs--weather information
 
    - Ziff-Davis--technology news and information
 
    COMMERCE PARTNERS.  Our electronic commerce relationships include:
 
    - barnesandnoble.com--book purchases
 
    - CIM--Brazilian music
 
    - Citibank--online banking and credit card applications
 
    - Disney--branded merchandise
 
    - Music Boulevard (N2K)--music products, CDs, clothing, posters and books
 
    - Outpost.com--computer and technology merchandise
 
    - SportsSuperstore--sports merchandise
 
    - Tickets.com--event information and ticketing
 
    NETSCAPE.  In May 1998, we entered into a marketing and distribution
agreement with Netscape. Together, we developed and launched NETSCAPE GUIDE BY
STARMEDIA in both Spanish and Portuguese. NETSCAPE GUIDE BY STARMEDIA is one of
the core services available as part of Netscape's Latin American Spanish and
Portuguese browsers. We also appear as a premium bookmark located on Netscape's
Spanish and Portuguese browser toolbars. These bookmarks link users directly to
our network. StarMedia Noticias/Noticias appears as a ticker on the Netscape
Latin America and Brazil homepages and directs users to our network's general
news areas. In addition, Netscape promotes StarMedia throughout its Spanish and
Portuguese offerings.
 
    REALNETWORKS.  In February 1999, we entered into a relationship with
RealNetworks, the leading provider of streaming audio/video over the Internet.
We are the only in-language Internet company featured as a default channel on
both the Spanish and Portuguese versions of RealNetworks' RealPlayer G2. This
relationship uniquely positions us to enhance our user base by enabling Spanish
and Portuguese-speaking Internet users to access our in-language streaming
content, including music videos, television and radio programming, and sporting
events directly from RealPlayer.
 
                               ADVERTISING SALES
 
    We have built a direct sales organization of over 60 professionals located
in eight offices: Sao Paulo, Mexico City, Buenos Aires, Bogota, Santiago,
Caracas, Miami and New York.
 
    Our sales organization is dedicated to maintaining close relationships with
top advertisers and leading advertising agencies throughout Latin America. It is
structured on a regional basis and is focused solely on selling advertising on
our network. Our sales organization consults regularly with advertisers and
agencies on design and placement of their Web-based advertising, provides
customers with advertising measurement analysis and focuses on providing a high
level of customer service satisfaction.
 
    Currently, advertisers and advertising agencies enter into agreements under
which they pay for a guaranteed number of impressions for a fixed fee. These
agreements range from one month to multiple years. Advertising on our network
currently consists primarily of banner-style advertisements, buttons and
sponsorships from which viewers can hyperlink directly to the advertiser's own
Web site. Our standard cost per thousand impressions, commonly referred to as
CPMs, for banner advertisements varies depending on location of the
advertisements on the network, the targeted country and the extent to which it
is targeted for a particular audience. Discounts from standard CPM rates may be
provided for higher volume, longer-term advertising contracts.
 
    We also offer promotional advertising programs, such as contests, sampling
and couponing opportunities, in order to build brand awareness, generate leads
and drive traffic to an advertiser's site.
 
                                       40

    ADVERTISING CUSTOMERS.  During 1998, 72 companies advertised on the
StarMedia network, up from 6 advertisers in 1997. The following is a selected
list of our current advertising customers:
 

                 
Bradesco            IBM
Ford                Fox Television
Microsoft           Motorola
Nokia               Sony

 
    We have derived substantially all of our revenues to date from the sale of
advertisements and sponsorships. In the fourth quarter of 1998, we had 44
advertisers, up from 3 advertisers in the first quarter of 1998. In 1998, two
advertisers each accounted for greater than 10% of total revenues and the five
largest advertisers accounted for 62% of total revenues.
 
                         MARKETING AND BRAND AWARENESS
 
    We use multiple advertising media, such as television, print and Web-based
advertising in order to:
 
    - build our brand;
 
    - increase traffic; and
 
    - raise our profile among potential advertisers.
 
Our television advertisements have appeared on broadcast television in Brazil,
Mexico, Colombia, Argentina, Chile, the United States, Uruguay, Venezuela,
Spain, Peru and on cable networks throughout Latin America. Our first television
commercial, "Birth of a Star", began airing in 18 Latin American markets in
Spanish and Portuguese in February 1997. In addition to advertising on
television, we advertise in print, use outdoor advertising and have a
significant presence in highly-targeted online media. We also have an extensive
public relations campaign. We are currently in the midst of our fourth
advertising campaign across Latin America. Our strategic and content partners
also typically provide us with advertising support.
 
    We form marketing alliances with companies that have broad reach and whose
customers are similar to our target customers. We currently have co-marketing
relationships with Fox Latin America, USA Networks and other regional television
stations.
 
                         TECHNOLOGY AND INFRASTRUCTURE
 
    Our technology infrastructure is built and maintained for reliability,
security, and flexibility and is administered by our technical staff.
 
    We maintain our central production servers at the New Jersey data center of
Exodus Communications. We also have a second co-location facility at Digital
Island in New York. We maintain regional network operating centers in Brazil and
Argentina. Our operations depend on the ability of Exodus or Digital Island to
protect their systems against damage from fire, hurricanes, power loss,
telecommunications failure, break-ins, or other events.
 
    Exodus and Digital Island provide comprehensive facilities management
services, including human and technical monitoring of all production servers 24
hours per day, 7 days per week. Exodus and Digital Island also provide
connectivity for our U.S. servers through multiple high-speed connections. In
Brazil and Argentina, our servers are connected to the largest backbone
providers in each country. All facilities are protected by multiple
uninterruptible power supplies.
 
    For reliability, availability, and serviceability, we have implemented a
modular server environment. Key components of our server architecture are served
by multiple redundant machines.
 
    We employ in-house and third-party monitoring software. Reporting and
tracking systems generate daily traffic, demographic, and advertising reports.
Our production data is copied to backup tapes each night.
 
    We employ in-house and third-party software to monitor access to our
production and development servers.
 
    Our network must accommodate a high volume of traffic and deliver frequently
updated information. Components or features of our network have in the past
suffered outages or experienced slower response times because of equipment or
software downtime.
 
                                       41

                                  COMPETITION
 
    There are many companies that provide Web sites and online destinations
targeted to Latin Americans and Spanish- and Portuguese-speaking people in
general. All of these companies compete with us for visitor traffic, advertising
dollars and electronic commerce partners. The market for Internet content
companies in Latin America is new and rapidly evolving. Competition for
visitors, advertisers and electronic commerce partners is intense and is
expected to increase significantly in the future because there are no
substantial barriers to entry in our market. Increased competition could result
in:
 
    - lower advertising rates;
 
    - price reductions and lower profit margins;
 
    - loss of visitors;
 
    - reduced page views; or
 
    - loss of market share.
 
Any one of these could materially and adversely affect our business, financial
condition and results of operations.
 
    Our ability to compete successfully depends on many factors. These factors
include:
 
    - the quality of the content provided by us and our competitors;
 
    - how easy our respective services are to use;
 
    - sales and marketing efforts; and
 
    - the performance of our technology.
 
    We compete with providers of content and services over the Internet,
including Web directories, search engines, content sites and sites maintained by
government and educational institutions. Our current competitors include:
 
    - companies that target Spanish-speakers throughout Latin America, like
      Ciudad Futura, El Sitio, Telefonica/Ole and Yupi;
 
    - Spanish- and Portuguese-language versions of U.S. companies like
      CompuServe and Yahoo!; and
 
    - companies like ZAZ (Brazil), CompuServe Mexico (Mexico), Ciudad Internet
      (Colombia) and Universo Online (Brazil), that target particular Latin
      American countries.
 
    In addition, America Online recently announced a joint venture with the
Cisneros Group to enter the Latin American Internet market, initially targeting
Brazil, Mexico and Argentina.
 
    Many of our competitors and potential new competitors, have:
 
    - longer operating histories;
 
    - greater name recognition in some markets;
 
    - larger customer bases; and
 
    - significantly greater financial, technical and marketing resources.
 
    These competitors may also be able to:
 
    - undertake more extensive marketing campaigns for their brands and
      services;
 
    - adopt more aggressive advertising pricing policies;
 
    - use superior technology platforms to deliver their products and services;
      and
 
    - make more attractive offers to potential employees, distribution partners,
      commerce companies, advertisers and third-party content providers.
 
    Our competitors may develop content that is better than ours or that
achieves greater market acceptance. It is also possible that new competitors may
emerge and acquire significant market share. This could have a material and
adverse effect on our business, financial condition and results of operations.
 
    We also compete with traditional forms of media, like newspapers, magazines,
radio and television for advertisers and advertising revenue. If advertisers
perceive the Internet or our network to be a limited or an ineffective
advertising medium, they may be reluctant to devote a portion of their
advertising budget to Internet advertising or to advertising on our network.
 
                 GOVERNMENT REGULATION AND LEGAL UNCERTAINTIES
 
    To date, regulations have not materially restricted use of the Internet in
our markets.
 
                                       42

However, the legal and regulatory environment that pertains to the Internet is
uncertain and may change. New laws and regulations may be adopted. Existing laws
may be applied to the Internet and new forms of electronic commerce. Uncertainty
and new regulations could increase our costs and prevent us from delivering our
products and services over the Internet. It could also slow the growth of the
Internet significantly. This could delay growth in demand for our network and
limit the growth of our revenues. New and existing laws may cover issues like:
 
    - sales and other taxes;
 
    - user privacy;
 
    - pricing controls;
 
    - characteristics and quality of products and services;
 
    - consumer protection;
 
    - cross-border commerce;
 
    - libel and defamation;
 
    - copyright, trademark and patent infringement;
 
    - pornography; and
 
    - other claims based on the nature and content of Internet materials.
 
    Each country in Latin America has its own telephone tariffs which, if too
high, may cause consumers to be less likely to access and transact business over
the Internet. Although the tariffs have been reduced recently in some countries,
we do not know whether this trend will continue. Unfavorable tariff developments
could decrease our visitor traffic and our ability to derive revenues from
transactions over the Internet. This could have a material adverse effect on our
business, financial condition and results of operations.
 
                  INTELLECTUAL PROPERTY AND PROPRIETARY RIGHTS
 
    We regard our copyrights, service marks, trademarks, trade secrets and other
intellectual property as critical to our success. We rely on trademark and
copyright law, trade secret protection and confidentiality and/or license
agreements with our employees, customers, partners and others to protect our
intellectual property rights. Despite our precautions, it may be possible for
third parties to obtain and use our intellectual property without authorization.
Furthermore, the validity, enforceability and scope of protection of
intellectual property in Internet-related industries is uncertain and still
evolving. The laws of some foreign countries do not protect intellectual
property to the same extent as do the laws of the United States.
 
    We pursue the registration of our trademarks in the United States and
internationally in Latin America, Spain and Portugal. We may not be able to
secure adequate protection for our trademarks in the United States and other
countries. We are aware of an opposition filed in Spain against our application
for registration of the StarMedia trademark, which we are currently contesting.
In addition, there have been other oppositions filed against our applications in
other countries for some of our other marks.
 
    We currently hold trademark registrations in the United States, Peru,
Uruguay, Colombia and Paraguay for the StarMedia trademark and registrations for
other marks in some of these and other countries. Effective trademark protection
may not be available in all the countries in which we conduct business. Policing
unauthorized use of our marks is also difficult and expensive. In addition, it
is possible that our competitors will adopt product or service names similar to
ours, thereby impeding our ability to build brand identity and possibly leading
to customer confusion.
 
    We actively seek to protect our marks against similar and confusing marks of
third parties by:
 
    - using a watch service which identifies applications to register
      trademarks;
 
    - filing oppositions to third parties' applications for trademarks; and
 
    - bringing lawsuits against infringers.
 
    For example, we are aware of certain unauthorized uses of our PIZARRAS
trademark and intend to pursue enforcement of our rights against those who are
infringing this mark. This may be time consuming and expensive. Our inability to
effectively protect our trademarks and service marks would have a material
adverse effect on our business, financial conditions and results of operations.
 
                                       43

    Many parties are actively developing chat, homepage, search and related Web
technologies. We expect these developers to continue to take steps to protect
these technologies, including seeking patent protection. There may be patents
issued or pending that are held by others and that cover significant parts of
our technology, business methods or services. For example, we are aware that a
number of patents have been issued in the areas of electronic commerce,
Web-based information indexing and retrieval and online direct marketing.
Disputes over rights to these technologies are likely to arise in the future. We
cannot be certain that our products do not or will not infringe valid patents,
copyrights or other intellectual property rights held by third parties. We may
be subject to legal proceedings and claims from time to time relating to the
intellectual property of others in the ordinary course of our business. In the
event that we determine that licensing this intellectual property is
appropriate, we may not be able to obtain a license on reasonable terms or at
all. We may also incur substantial expenses in defending against third-party
infringement claims, regardless of the merit of these claims. Successful
infringement claims against us may result in substantial monetary liability or
may prevent us from conducting all or a part of our business.
 
    We also intend to continue to license certain technology from third parties,
including our Web-server and encryption technology. The market is evolving and
we may need to license additional technologies to remain competitive. We may not
be able to license these technologies on commercially reasonable terms or at
all. In addition, we may fail to successfully integrate any licensed technology
into our services. Our inability to obtain any of these licenses could delay
product and service development until alternative technologies can be
identified, licensed and integrated.
 
                                   EMPLOYEES
 
    As of February 28, 1999, we had 247 full-time employees, of whom 64 worked
in sales, 10 in editorial, 18 in marketing, 107 in product and technology and 48
in finance and administration. From time to time, we employ independent
contractors to support our research and development, marketing, sales and
editorial departments. None of our personnel are represented under collective
bargaining agreements. We consider our relations with our employees to be good.
 
                                   FACILITIES
 
    Our principal executive offices are located in approximately 19,500 square
feet of office space in New York, New York, under a lease that expires in August
2003. We also lease sales and business development office space in:
 
    - Sao Paulo, Brazil;
 
    - Mexico City, Mexico;
 
    - Buenos Aires, Argentina;
 
    - Bogota, Colombia;
 
    - Santiago, Chile;
 
    - Montevideo, Uruguay;
 
    - Caracas, Venezuela; and
 
    - Miami, Florida.
 
                               LEGAL PROCEEDINGS
 
    There are no material legal proceedings pending or, to our knowledge,
threatened against us.
 
                                       44

                                   MANAGEMENT
 
DIRECTORS AND EXECUTIVE OFFICERS
 
    The following table sets forth the executive officers, directors and key
employees of StarMedia, their ages and the positions held by them:
 


NAME                                               AGE      POSITION
- ---------------------------------------------      ---      ------------------------------------------------------------
                                                      
Fernando J. Espuelas.........................          32   Chairman of the Board of Directors
                                                            and Chief Executive Officer
Jack C. Chen.................................          32   President and Director
Tracy J. Leeds...............................          34   Chief Operating Officer
Steven J. Heller.............................          33   Vice President, Finance and Administration
Adriana J. Kampfner..........................          26   President, StarMedia, Mexico and Senior Vice President,
                                                            Global Sales
James D. Granlund............................          35   Chief Technology Officer
Douglas M. Karp..............................          43   Director
Christopher T. Linen(1)......................          49   Director
Gerardo M. Rosenkranz(2).....................          47   Director
Susan L. Segal...............................          46   Director
Frederick R. Wilson(1)(2)....................          36   Director

 
- ------------------------
 
(1) Member of the compensation committee
 
(2) Member of the audit committee
 
    FERNANDO J. ESPUELAS is a founder of StarMedia and has been Chairman of the
Board and Chief Executive Officer since September 1996. Prior to founding
StarMedia, Mr. Espuelas was employed in various positions at AT&T from 1994 to
1996, most recently as Managing Director of Marketing Communications for the
Americas. From 1991 to 1994, Mr. Espuelas was employed in various positions at
Ogilvy & Mather, an international advertising firm, most recently as Regional
Account Director for Latin America. Prior to his employment at Ogilvy & Mather,
Mr. Espuelas worked at other major advertising agencies, including Lowe &
Partners and Wunderman Worldwide. He received a B.A. with Distinction from
Connecticut College. Mr. Espuelas is a native of Uruguay.
 
    JACK C. CHEN is a founder of StarMedia and has been President and a Director
since March 1996. Prior to founding StarMedia, Mr. Chen was a Vice President at
S.L. Chen & Associates, Inc., an international merchant banking firm, advising
companies, joint ventures and government organizations from 1995 through 1996.
Mr. Chen was a securities analyst at CS First Boston Investment Management from
1994 to 1995. Prior to his employment at CS First Boston, Mr. Chen was an
investment banker at Goldman, Sachs & Co. Mr. Chen received an M.B.A. from
Harvard Business School and a B.A. with High Honors in Computer Science from
Harvard University.
 
    TRACY J. LEEDS has been the Chief Operating Officer of StarMedia since
September 1998, and prior to that served as StarMedia's Vice President, Business
Operations since July 1997. From 1996 to 1997, Ms. Leeds was General Manager of
the Healthsite Web service for AT&T Personal Online Services. From 1994 to 1996,
she was Director of the PC DreamShop the electronic commerce project of Time
Warner Cable Programming. Prior to that, Ms. Leeds was Director, Client
Services, for Catalog 1, a joint venture between Time Warner and Spiegel. Ms.
Leeds has also held various marketing positions at Johnson & Johnson and
Playtex. Ms. Leeds received an M.B.A. from Harvard Business School and a B.A.
from Yale University.
 
    STEVEN J. HELLER has been Vice President, Finance and Administration of
StarMedia since
 
                                       45

October 1997. From 1995 to 1997, Mr. Heller was Director, Finance and
Administration, and Treasurer at Evolve Software, Inc., a software firm based in
San Francisco. Prior to that, Mr. Heller was Managing Director of
Entrepreneurial Accounting Resources, a firm he founded in 1991 that provided
finance and accounting consulting services to high technology and media
companies. Mr. Heller served in the San Francisco office of Coopers & Lybrand in
the Emerging Business Services division of the Business Assurance Group from
1987 to 1991. He received a B.S. degree from The American University.
 
    ADRIANA J. KAMPFNER is President of StarMedia, Mexico and Senior Vice
President of Global Sales. Ms. Kampfner has worked at StarMedia since August
1997. Prior to her current position, Ms. Kampfner was StarMedia's Vice
President, General Manager, Mexico and StarMedia's Director of Sales, North
America, responsible for initiating relationships with key domestic and
international clients. Before joining StarMedia, Ms. Kampfner was a Senior
Financial Analyst at Chase Securities Inc. from 1996 to 1997. Ms. Kampfner
received a B.A. in Business Administration from the University of Michigan.
 
    JAMES D. GRANLUND joined StarMedia as its Chief Technology Officer in
January 1999. Prior to joining StarMedia, Mr. Granlund was Vice President,
Operations and Technology for Turner Broadcast Systems/CNNfn from 1995 until
1999. During his tenure with CNNfn, he designed, developed and implemented
technological strategies and maintained operational integrity for both the CNNfn
television network and CNNfn.com Web site. Prior to joining Turner Broadcast
Systems, Mr. Granlund was manager of Work Group Computing for Bristol-Myers
Squibb Company from 1988 to 1995. He received a B.S. in Industrial and Labor
Relations from Cornell University.
 
    DOUGLAS M. KARP has been a Director of StarMedia since September 1998. Mr.
Karp is currently Managing Director and a member of the Operating Committee of
E.M. Warburg, Pincus & Company, LLC, where he is responsible for limited partner
relationships and fund raising as well as the firm's Communications and Latin
American investments. Prior to joining Warburg, Pincus, he was a Managing
Director of Mergers and Acquisitions at Salomon Brothers Inc. from 1989 to 1991
and a manager with the Boston Consulting Group and founder of its New York
office. Mr. Karp is a member of the boards of directors of Qwest Communications,
Journal Register Company, TV Filme, Inc., Primus Telecommunications Group,
Golden Books Family Entertainment and PageNet do Brasil. Mr. Karp received a
B.A. from Yale University and a J.D. from Harvard Law School.
 
    CHRISTOPHER T. LINEN has been a Director of StarMedia since November 1996.
Currently, Mr. Linen is Principal of Christopher Linen & Company, a venture
capital firm. Mr. Linen was President and Chief Executive Officer of Warner
Music Enterprises, a Time Warner Inc. unit charged with developing new music-
related opportunities including Internet properties and direct marketing
businesses worldwide from 1992 to 1996. From 1988 to 1992, Mr. Linen was
President and Chief Executive Officer of Time Warner Direct, a unit of Time
Warner Inc. composed of Time Life, one of the world's largest direct marketers
of books, music and videocassettes; Book-of-the-Month Club Inc., the nation's
largest book club operator; and related ventures. Prior to his employment with
Time Warner Direct, Mr. Linen held various top-level executive positions at Time
Life, including President and Chief Executive Officer and Managing Director for
Latin America, and currently serves on the board of directors of Allied Devices
Corporation. Mr. Linen received a B.S. from Williams College and attended the
Graduate School of Business Administration at New York University.
 
    GERARDO M. ROSENKRANZ has been a Director of StarMedia since November 1996.
Mr. Rosenkranz is a private investor and founder and Chief Executive Officer of
Ventech International, Inc. Ventech provides consulting services to
telecommunications and information technology companies. Prior to establishing
Ventech in 1995, Mr. Rosenkranz
 
                                       46

served for 10 years at Sprint International (formerly GTE Telenet), where he
held senior executive positions in management, business development and sales.
Mr. Rosenkranz received B.S., M.S. and Engineer Degrees in Electrical
Engineering from Stanford University. He was born and raised in Mexico City,
Mexico.
 
    SUSAN L. SEGAL has been a Director of StarMedia since July 1997. Ms. Segal
has served as General Partner and Latin American Group Head at Chase Capital
Partners since December 1996. From 1992 to 1996, Ms. Segal was a Senior Managing
Director at Chase Securities Inc. responsible for Emerging Markets Investment
Banking. She has more than 20 years of experience in emerging markets,
particularly Latin America, where her responsibilities have included trading,
capital markets and sovereign debt rescheduling. Ms. Segal is a member of the
Council on Foreign Relations, the advisory board of the Council of the Americas
and the boards of directors of the Tinker Foundation, the Americas Society and
the Corp Group. Ms. Segal received an M.B.A. from Columbia University and a B.A.
from Sarah Lawrence College.
 
    FREDERICK R. WILSON has been a Director of StarMedia since July 1997. Mr.
Wilson is currently Managing Partner of Flatiron Partners, a venture capital
firm focused on early-stage, Internet-focused investments. Prior to founding
Flatiron Partners, Mr. Wilson was associated with Euclid Partners from 1986 to
1996. He received an M.B.A. from The Wharton School of Business at The
University of Pennsylvania and a B.S. in Mechanical Engineering and Computer
Science from MIT.
 
                         CLASSIFIED BOARD OF DIRECTORS
 
    Our board of directors is divided into three classes of directors serving
staggered three-year terms. As a result, approximately one-third of the board of
directors will be elected each year. These provisions, when coupled with the
provision of our amended and restated certificate of incorporation authorizing
the board of directors to fill vacant directorships or increase the size of the
board of directors, may delay a stockholder from removing incumbent directors
and simultaneously gaining control of the board of directors by filling the
vacancies with its own nominees.
 
                                BOARD COMMITTEES
 
    The audit committee reports to the board regarding the appointment of our
independent public accountants, the scope and results of our annual audits,
compliance with our accounting and financial policies and management's
procedures and policies relative to the adequacy of our internal accounting
controls. The audit committee consists of Gerardo M. Rosenkranz and Frederick R.
Wilson.
 
    The compensation committee of the board of directors reviews and makes
recommendations to the board regarding our compensation policies and all forms
of compensation to be provided to our executive officers and directors. In
addition, the compensation committee reviews bonus and stock compensation
arrangements for all of our other employees. The current members of the
compensation committee are Christopher T. Linen and Frederick R. Wilson. No
interlocking relationships exist between our board of directors or compensation
committee and the board of directors or compensation committee of any other
company, nor has any such interlocking relationship existed in the past.
 
                             DIRECTOR COMPENSATION
 
    Directors currently do not receive a stated salary from StarMedia for their
service as members of the board of directors, although by resolution of the
board, they may receive a fixed sum and reimbursement for expenses in
 
                                       47

connection with the attendance at board and committee meetings. We currently do
not provide additional compensation for committee participation or special
assignments of the board of directors. From time to time, some of our directors
have received grants of options to purchase shares of common stock.
 
                              EMPLOYMENT CONTRACTS
 
    We have entered into executive employment agreements with Fernando J.
Espuelas, our Chairman and Chief Executive Officer, and Jack C. Chen, our
President.
 
                             EXECUTIVE COMPENSATION
 
    The following table sets forth the total compensation paid or accrued for
the year ended December 31, 1998 to our Chief Executive Officer and to each of
our most highly compensated executive officers, other than the Chief Executive
Officer, whose salary and bonus for such fiscal year exceeded $100,000.
Securities Underlying Options/SARs does not include options cancelled under our
1997 Plan, but does include the immediate reissuance of options equal to the
cancelled options under our 1998 Plan.
 
                           SUMMARY COMPENSATION TABLE
 


                                                                                                     LONG-TERM
                                                                                                   COMPENSATION
                                                                                                 -----------------
                                                                                                      AWARDS
                                                                                                 -----------------
                                                                         ANNUAL COMPENSATION        SECURITIES
                                                                       ------------------------     UNDERLYING
NAME AND PRINCIPAL POSITION                                             SALARY($)    BONUS ($)    OPTIONS/SARS(#)
- ---------------------------------------------------------------------  -----------  -----------  -----------------
                                                                                        
Fernando J. Espuelas.................................................  $   152,084  $   200,000        1,750,000
  Chairman of the Board and Chief Executive Officer
 
Jack C. Chen.........................................................      152,104      200,000        1,750,000
  President
 
Tracy J. Leeds.......................................................      117,917           --          550,000
  Chief Operating Officer
 
Steven J. Heller.....................................................      106,667           --          190,000
  Vice President, Finance and Administration
 
Adriana J. Kampfner..................................................      138,750           --          230,000
  President, StarMedia Mexico, Senior Vice President, Global Sales

 
                       OPTION GRANTS IN LAST FISCAL YEAR
 
    The following table sets forth grants of stock options for the year ended
December 31, 1998 to our Chief Executive Officer and our most highly compensated
executive officers, other than our Chief Executive Officer, whose salary and
bonus exceeded $100,000. The options shown for each executive officer do not
include options cancelled under our 1997 Plan, but do include the immediate
reissuance of options equal to the cancelled options under our 1998 Plan. We
have never granted any stock appreciation rights. The potential realizable value
is calculated based on the term of the option at its time of grant. It is
calculated assuming that the fair market value of common stock on the date of
grant appreciates at the indicated annual rate compounded annually for the
entire term of the option and that the option is exercised and sold on the last
day of its term for the appreciated stock price. These numbers are calculated
based on the requirements of the Securities and Exchange Commission and do not
reflect our estimate of future stock price growth.
 
                                       48



                                                                                                                  POTENTIAL
                                                                                                                 REALIZABLE
                                                                                                                  VALUE AT
                                                                                                                   ASSUMED
                                                OPTION GRANTS IN LAST FISCAL YEAR                               ANNUAL RATES
                                                        INDIVIDUAL GRANTS                                            OF
                               -------------------------------------------------------------------               STOCK PRICE
                                NUMBER OF                                                                       APPRECIATION
                                SECURITIES      PERCENT OF TOTAL       EXERCISE                                  FOR OPTION
                                UNDERLYING     OPTIONS GRANTED TO      PRICE PER     FMV ON THE                     TERM
                                 OPTIONS          EMPLOYEES IN           SHARE      DATE OF GRANT   EXPIRATION  -------------
NAME                            GRANTED(#)     FISCAL YEAR (%) (1)     ($/SHARE)      ($/SHARE)        DATE         0%($)
- -----------------------------  ------------  -----------------------  -----------  ---------------  ----------  -------------
                                                                                              
Fernando J. Espuelas.........    1,000,000                 17%         $    0.50      $    2.08         4/1/08  $   1,580,000
                                   750,000                 13               1.60           5.20       12/17/08      2,700,000
Jack C. Chen.................    1,000,000                 17               0.50           2.08         4/1/08      1,580,000
                                   750,000                 13               1.60           5.20       12/17/08      2,700,000
Tracy J. Leeds...............      375,000                  6               0.50           3.83        7/16/07      1,248,750
                                   175,000                  3               0.50           4.54        9/17/08        707,000
Steven J. Heller.............      100,000                  2               0.50           3.83        7/10/08        333,000
                                    90,000                  2               0.50           4.54        9/17/08        363,600
Adriana J. Kampfner..........      130,000                  3               0.50           3.83        7/10/08        432,900
                                   100,000                  2               0.50           4.54        9/17/08        404,000
 

 
NAME                               5%($)         10%($)
- -----------------------------  -------------  -------------
                                        
Fernando J. Espuelas.........  $   2,890,400  $   4,887,200
                                   5,157,000      8,901,000
Jack C. Chen.................      2,890,400      4,887,200
                                   5,157,000      8,901,000
Tracy J. Leeds...............      2,153,588      3,532,388
                                   1,207,535      1,970,255
Steven J. Heller.............        574,290        941,970
                                     621,018      1,013,274
Adriana J. Kampfner..........        746,577      1,224,561
                                     690,020      1,125,860

 
- ------------------------
 
(1) Based on options to purchase an aggregate of 5,782,000 shares of common
    stock granted under our 1998 Plan to employees, consultants and directors of
    StarMedia and under our 1997 Plan to Messrs. Espuelas and Chen in the year
    ended December 31, 1998. All options granted under our 1997 Plan, other than
    those granted to Messrs. Espuelas and Chen, have been cancelled and reissued
    under our 1998 Plan.
 
                         FISCAL YEAR-END OPTION VALUES
 
    The following table provides some information about stock options held as of
December 31, 1998 by our Chief Executive Officer and our most highly compensated
executive officers other than our Chief Executive Officer. No options were
exercised during fiscal 1998 by any of these executive officers. There was no
public trading market for the common stock as of December 31, 1998. Accordingly,
the value of unexercised in-the-money options at fiscal year-end is based on the
assumed initial public offering price of $    per share, less the exercise price
per share, multiplied by the number of shares underlying the options.
 
                         FISCAL YEAR-END OPTION VALUES
 


                                                          NUMBER OF SECURITIES
                                                         UNDERLYING UNEXERCISED          VALUE OF UNEXERCISED
                                                               OPTIONS AT                IN-THE-MONEY OPTIONS
                                                           FISCAL YEAR-END (#)            AT FISCAL YEAR END
                                                      -----------------------------  ----------------------------
NAME                                                   EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
- ----------------------------------------------------  -------------  --------------  ------------  --------------
                                                                                       
Fernando J. Espuelas................................      1,750,000             --    $             $
 
Jack C. Chen........................................      1,750,000             --
 
Tracy J. Leeds......................................         82,639        467,361
 
Steven J. Heller....................................         36,111        153,889
 
Adriana J. Kampfner.................................         13,333        216,667

 
                               STOCK OPTION PLANS
 
1997 STOCK OPTION PLAN
 
    Our 1997 Stock Option Plan was adopted by the board of directors in June
1997. A total of 5,000,000 shares of common stock were authorized for issuance
under the 1997 Plan. When the 1998 Plan was adopted, all options outstanding
under the 1997 Plan were cancelled and reissued under the 1998 Plan, other than
those granted to Messrs. Espuelas and Chen in the aggregate amount of 2,000,000.
We will not issue additional options under the 1997 Plan.
 
                                       49

    The exercise price for the shares of common stock subject to option grants
made under the 1997 Plan may, at the discretion of the plan administrator, be
paid in cash or in shares of common stock valued at fair market value on the
exercise date.
 
    In the event of a merger pursuant to which StarMedia is acquired, each
outstanding option may, at the discretion of the plan administrator, be assumed
by the successor corporation or terminated in exchange for a cash payment equal
to the difference between the fair market value of the shares for which the
option is at the time exercisable and the exercise price payable for such
shares.
 
    The board may amend or modify the 1997 Plan at any time. The 1997 Plan will
terminate in all events on December 31, 1999. Options under the 1997 Plan,
however, will remain outstanding in accordance with their terms.
 
1998 STOCK PLAN
 
    Our 1998 Stock Plan was adopted by the board of directors and approved by
the stockholders in July 1998. A total of 15,000,000 shares of common stock have
been authorized for issuance under the 1998 Plan. The number of shares of common
stock available for issuance under the 1998 Plan will increase on July 1 of each
year beginning in 2000 by the lesser of (i) 4 million shares, (ii) 4% of the
outstanding shares on such date or (iii) an amount determined by the board.
 
    Under the 1998 Plan, eligible individuals in StarMedia's employ or service
may, at the discretion of the plan administrator, be granted options to purchase
shares of common stock at an exercise price determined by the plan administrator
or may be issued shares of common stock directly through the purchase of such
shares at a price determined by the plan administrator. Eligible individuals
include officers, non-employee board members and consultants.
 
    The 1998 Plan is administered by the compensation committee of the board.
The compensation committee as plan administrator has complete discretion to
determine which eligible individuals are to receive option grants or stock
issuances, the time or times when such option grants or stock issuances are to
be made, the number of shares subject to each such grant or issuance, the status
of any granted option as either an incentive stock option or a non-statutory
stock option under the Federal tax laws, the vesting schedule to be in effect
for the option grant or stock issuance and the maximum term for which any
granted option is to remain outstanding.
 
    The exercise price for the shares of common stock subject to option grants
made under the 1998 Plan may, at the discretion of the plan administrator, be
paid in cash, in shares of common stock valued at fair market value on the
exercise date, through a same-day sale program without any cash outlay by the
optionee or by delivering a full-recourse, interest-bearing promissory note.
 
    In the event of an acquisition of StarMedia, whether by merger or asset
sale, each option which is not to be assumed by the successor corporation will
automatically accelerate in full and all unvested shares will immediately vest,
except to the extent that StarMedia's repurchase rights with respect to those
shares are to be assigned to the successor corporation.
 
    The plan administrator has the authority to effect the cancellation of
outstanding options in return for the grant of new options for the same or
different number of option shares with an exercise price per share based upon
the fair market value of the common stock on the new grant date.
 
    The board may amend or modify the 1998 Plan at any time, subject to any
required stockholder approval. The 1998 Plan will terminate on the earliest of
(i) the date determined by the board, (ii) the date on which all shares
available for issuance under the 1998 Plan have been issued as fully-vested
shares or (iii) the termination of all outstanding options in connection with an
acquisition of StarMedia.
 
                                       50

                              CERTAIN TRANSACTIONS
 
    In 1996, our directors, officers and 5% stockholders, and their affiliates,
purchased common stock as follows:
 


                                 NUMBER OF
                                 SHARES OF    PURCHASE
                                  COMMON      PRICE PER
NAME OF INVESTOR                   STOCK        SHARE
- ------------------------------  -----------  -----------
                                       
Fernando J. Espuelas..........    4,500,000   $   .0056
Jack C. Chen..................    4,500,000       .0056
Gerardo M. Rosenkranz.........      220,000         .09
Christopher T. Linen..........      100,000         .25
A trust, of which Mr. Chen is
  trustee.....................       20,000         .50

 
    Messrs. Espuelas, Chen, Rosenkranz and Linen currently serve as our officers
and/or directors.
 
    In May 1997, we issued options to purchase 280,000 shares of common stock at
an exercise price of $0.09 per share to Mr. Rosenkranz. At that time, we also
issued options to purchase 100,000 shares of common stock at an exercise price
of $0.25 per share to Mr. Linen.
 
    In July 1997, we sold 7,330,000 shares of our series A redeemable
convertible preferred stock to a number of investors at a purchase price of
$0.50 per share. Of these, our directors, officers and 5% stockholders, and
their affiliates, purchased shares as follows:
 


                                         NUMBER OF SHARES
                                           OF SERIES A
                                            REDEEMABLE
                                           CONVERTIBLE
NAME OF INVESTOR                         PREFERRED STOCK
- ---------------------------------------  ----------------
                                      
Chase Venture Capital Associates.......       5,535,000
fl@tiron Fund..........................         465,000
Tracy Leeds and family.................         200,000
Christopher T. Linen...................         100,000
Gerardo Rosenkranz, family and
  affiliates...........................         100,000
A trust, of which Mr. Chen is
  trustee..............................          20,000

 
    Chase Venture Capital Associates owns more than 5% of our stock. In
addition, Susan Segal, one of our directors, is affiliated with Chase Venture
Capital Associates. The fl@tiron Fund is controlled by Frederick Wilson, one of
our directors. Tracy Leeds currently serves as one of our executive officers.
After this offering, all of the series A redeemable convertible preferred stock
will automatically convert into an aggregate of 7,330,000 shares of common
stock.
 
    In January 1998, we issued 8% convertible subordinated notes that were due
on the earlier of July 21, 1998 or the closing of our series B redeemable
convertible preferred stock financing to the fl@tiron Fund in the aggregate
principal amount of $410,000 and to Chase Venture Capital Associates in the
aggregate principal amount of $3,590,000. The notes were repaid in full.
 
    In February 1998, we sold 8,000,000 shares of series B redeemable
convertible preferred stock to a number of investors at a purchase price of
$1.50 per share. Of these, our directors, officers and 5% stockholders, and
their affiliates, purchased shares as follows:
 


                                         NUMBER OF SHARES
                                           OF SERIES B
                                            REDEEMABLE
                                           CONVERTIBLE
NAME OF INVESTOR                         PREFERRED STOCK
- ---------------------------------------  ----------------
                                      
Chase Venture Capital Associates.......       2,393,333
fl@tiron Fund..........................         273,333
Gerardo Rosenkranz, family and
  affiliates...........................          66,666
Tracy Leeds and family.................          66,668
Family of Steven Heller................          30,000

 
    Steven Heller is one of our executive officers. After this offering, the
series B redeemable convertible preferred stock will automatically convert into
an aggregate of 8,000,000 shares of common stock.
 
    In August 1998, we issued 8% convertible subordinated notes that were due on
the earlier of December 31, 1998 or the closing of our series C redeemable
convertible preferred stock financing to the Flatiron Fund 1998/99 in the
aggregate principal amount of $200,000, and to Chase Venture Capital Associates
in the aggregate amount of $1,800,000. The Flatiron Fund 1998/99 is controlled
by Mr. Wilson. The notes were repaid in full.
 
                                       51

    In August 1998, we sold 16,666,667 shares of series C redeemable convertible
preferred stock to a number of investors at a purchase price of $4.80 per share.
Of these, our directors, officers and 5% stockholders, and their affiliates,
purchased shares as follows:
 


                                         NUMBER OF SHARES
                                           OF SERIES C
                                            REDEEMABLE
                                           CONVERTIBLE
NAME OF INVESTOR                         PREFERRED STOCK
- ---------------------------------------  ----------------
                                      
Chase Venture Capital Associates ......       3,750,000
Warburg, Pincus Equity Partners .......       2,380,209
Warburg, Pincus Ventures
  International .......................       2,380,208
Flatiron Fund 1998/99..................         416,667
Gerardo Rosenkranz, family and
  affiliates...........................         104,165
Tracy Leeds............................          28,918

 
    The Warburg, Pincus entities, collectively, own more than 5% of our stock.
In addition, Douglas M. Karp, one of our directors, is affiliated with the
Warburg, Pincus entities. After this offering, the series C redeemable
convertible preferred stock will automatically convert into an aggregate of
16,666,667 shares of common stock.
 
    We have entered into employment agreements with Fernando J. Espuelas, our
chairman and chief executive officer, and Jack C. Chen, our president.
 
    From time to time we have retained an affiliate of Chase Venture Capital
Associates to perform various investment banking and advisory services on our
behalf. The amount paid to this affiliate of Chase in 1998 for these services
was $1.2 million.
 
    We believe that these transactions were in the best interests of StarMedia.
It is our current policy that all transactions with officers, directors, 5%
stockholders and their affiliates be entered into only if they are approved by a
majority of the disinterested independent directors, are on terms no less
favorable to us than could be obtained from unaffiliated parties and are
reasonably expected to benefit us.
 
    For information concerning indemnification of directors and officers, please
see "Management" and "Description of Capital Stock--Indemnification of Certain
Directors and Officers and Limitation of Liability".
 
                                       52

                             PRINCIPAL STOCKHOLDERS
 
    The following table sets forth information with respect to beneficial
ownership of our common stock, as of March 18, 1999 and as adjusted to reflect
the sale of common stock offered by StarMedia in this offering for (i) each
person known by StarMedia to beneficially own more than 5% of the common stock,
(ii) each executive officer named in the Summary Compensation Table, (iii) each
director of StarMedia and (iv) all executive officers and directors of StarMedia
as a group. Beneficial ownership is determined in accordance with the rules of
the Securities and Exchange Commission and includes voting or investment power
with respect to the securities. Shares beneficially owned includes ownership of
shares of redeemable convertible preferred stock. Unless otherwise indicated,
the address for those listed below is c/o StarMedia Network, Inc., 29 West
36(th) Street, Fifth Floor, New York, New York 10018. Except as indicated by
footnote, and subject to applicable community property laws, the persons named
in the table have sole voting and investment power with respect to all shares of
common stock shown as beneficially owned by them. The number of shares of common
stock outstanding used in calculating the percentage for each listed person
includes the shares of common stock underlying options held by such persons that
are exercisable within 60 days of March 18, 1999, but excludes shares of common
stock underlying options held by any other person. Percentage of beneficial
ownership is based on 42,423,667 shares of common stock outstanding as of March
18, 1999, assuming the conversion of the redeemable convertible preferred stock,
and       shares of common stock outstanding after completion of this offering.
 


                                                                                        PERCENTAGE OF COMMON STOCK
                                                                      SHARES                BENEFICIALLY OWNED
                                                                   BENEFICIALLY   --------------------------------------
NAME OF BENEFICIAL OWNER                                               OWNED       PRIOR TO OFFERING    AFTER OFFERING
- -----------------------------------------------------------------  -------------  -------------------  -----------------
                                                                                              
Fernando J. Espuelas(1)..........................................      6,250,000            14.1%                   %
Jack C. Chen(2)..................................................      6,290,000            14.2
Tracy J. Leeds(3)................................................        336,557           *
Adriana J. Kampfner(4)...........................................         53,611           *
Steven J. Heller(5)..............................................         50,000           *
Douglas M. Karp(6)...............................................      4,760,417            11.2
Christopher T. Linen(7)..........................................        300,000           *
Gerardo M. Rosenkranz(8).........................................        588,055             1.4
Susan L. Segal(9)................................................     11,378,333            26.8
Frederick R. Wilson(10)..........................................      1,155,000             2.7
Chase Venture Capital Associates, L.P.(11).......................     11,378,333            26.8
Warburg, Pincus Equity Partners, L.P.(12)........................      2,380,209             5.6
Warburg, Pincus Ventures International, L.P.(12).................      2,380,208             5.6
All directors and executive officers as a group (11 persons).....     31,161,973            67.3

 
- ------------------------
 
*   Indicates less than one percent of the common stock.
 
(1) Includes (i) 1,750,000 shares issuable upon the exercise of currently
    exercisable stock options and (ii) 1,000,000 shares held by a trust, of
    which Mr. Espuelas is trustee.
 
(2) Includes (i) 1,750,000 shares issuable upon the exercise of currently
    exercisable stock options, (ii) 2,150,000 shares owned by Mr. Chen's spouse
    and (iii) an aggregate of 2,246,600 shares held by two trusts, of which Mr.
    Chen is trustee.
 
                                       53

(3) Includes 174,305 shares issuable upon the exercise of currently exercisable
    stock options and stock options which vest within 60 days.
 
(4) Consists of 53,611 shares issuable upon the exercise of currently
    exercisable stock options and stock options which vest within 60 days.
 
(5) Consists of 50,000 shares issuable upon the exercise of currently
    exercisable stock options and stock options which vest within 60 days.
 
(6) All shares indicated as owned by Mr. Karp are included because of Mr. Karp's
    affiliation with the Warburg, Pincus entities. Mr. Karp disclaims beneficial
    ownership of all shares owned by the Warburg, Pincus entities. Mr. Karp's
    address is c/o E.M. Warburg, Pincus & Co., LLC, 466 Lexington Avenue, New
    York, NY 10017. See note 12 below.
 
(7) Includes 100,000 shares owned by members of Mr. Linen's immediate family.
    Mr. Linen's address is c/o Christopher Linen & Co., 113 East 19(th) Street,
    New York, NY 10003.
 
(8) Consists of (i) 520,833 shares owned by Mr. Rosenkranz, (ii) 43,055 shares
    owned by a trust, of which Mr. Rosenkranz is managing trustee, and (iii)
    24,167 shares owned by a company controlled by Mr. Rosenkranz. Mr.
    Rosenkranz's address is c/o Ventech International, Inc., 60 Arch Street,
    Greenwich, CT 06830.
 
(9) All shares indicated as owned by Ms. Segal are included because of Ms.
    Segal's affiliation with Chase Venture Capital Associates, L.P., of which
    Chase Capital Partners is the general partner. Ms. Segal disclaims
    beneficial ownership of all shares owned by Chase Ms. Segal's address is c/o
    Chase Venture Capital Associates, L.P., 380 Madison Avenue, 9(th) Floor, New
    York, NY 10017.
 
(10) Consists of shares owned by the fI@tiron Fund, LLC and the FIatiron Fund
    1998/99, LLC which are controlled by Mr. Wilson. Mr. Wilson's address is c/o
    Flatiron Partners, 257 Park Avenue South, 12(th) Floor, New York, NY 10010.
 
(11) The address of Chase Venture Capital Partners is 380 Madison Avenue, 12(th)
    Floor, New York, NY 10017.
 
(12) The sole general partner of Warburg, Pincus Equity Partners, L.P., together
    with certain affiliated partnerships, (WPEP) and Warburg, Pincus Ventures
    International, L.P. (WPVI) is Warburg, Pincus & Co., a New York general
    partnership (WP). E.M. Warburg, Pincus & Co., LLC, a New York limited
    liability company (EMW LLC), manages WPEP and WPVI. The members of EMW LLC
    are substantially the same as the partners of WP. Lionel I. Pincus is the
    managing partner of WP and the managing member of EMW LLC and may be deemed
    to control both WP and EMW LLC. WP has a 20% interest in the profits of WPEP
    as the general partner, and also owns approximately 2% of the limited
    partnership interests in WPEP. WP has a 20% interest in the profits of WPVI
    as the general partner, and also owns approximately 1.25% of the limited
    partnership interests in WPVI. Mr. Karp, a director of StarMedia, is a
    Managing Director and member of EMW LLC and a general partner of WP. As
    such, Mr. Karp may be deemed to have an indirect pecuniary interest (within
    the meaning of Rule 16a-1 under the Securities Exchange Act of 1934) in an
    indeterminate portion of the shares beneficially owned by WPEP and WPVI. The
    address of the Warburg, Pincus entities is 466 Lexington Avenue, New York,
    NY 10017.
 
                                       54

                          DESCRIPTION OF CAPITAL STOCK
 
GENERAL
 
    StarMedia's amended and restated certificate of incorporation, which will
become effective upon the closing of this offering, authorizes the issuance of
up to 200,000,000 shares of common stock, par value $.001 per share, and
10,000,000 shares of preferred stock, par value $.001 per share, the rights and
preferences of which may be established from time to time by StarMedia's board
of directors. As of December 31, 1998, 10,392,000 shares of common stock were
outstanding and 31,996,667 shares of convertible preferred stock convertible
into the same amount of shares of common stock were issued and outstanding. As
of December 31, 1998, StarMedia had 83 stockholders.
 
                                  COMMON STOCK
 
    Under our amended and restated certificate of incorporation, holders of our
common stock are entitled to one vote for each share held of record on all
matters submitted to a vote of the stockholders, including the election of
directors. They do not have cumulative voting rights. Subject to preferences
that may be applicable to any then-outstanding preferred stock, holders of our
common stock are entitled to receive ratably dividends, if any, as may be
declared by the board of directors out of legally available funds. In case of a
liquidation, dissolution or winding up of StarMedia, the holders of common stock
will be entitled to share ratably in the net assets legally available for
distribution to shareholders after payment of all of our liabilities and any
preferred stock then outstanding. Holders of common stock have no preemptive or
conversion rights or other subscription rights. There are no redemption or
sinking fund provisions applicable to the common stock. The rights, preferences
and privileges of holders of common stock are subject to the rights of the
holders of shares of any series of preferred stock that we may designate and
issue in the future. After the closing of this offering, there will be no shares
of preferred stock outstanding.
 
                                PREFERRED STOCK
 
    Under our amended and restated certificate of incorporation, our board of
directors has the authority, without further action by the stockholders, to
issue from time to time, shares of preferred stock in one or more series. The
board of directors may fix the number of shares, designations, preferences,
powers and other special rights of the preferred stock. The preferences, powers,
rights and restrictions of different series of preferred stock may differ. The
issuance of preferred stock could decrease the amount of earnings and assets
available for distribution to holders of common stock or affect adversely the
rights and powers, including voting rights, of the holders of common stock. The
issuance may also have the effect of delaying, deferring or preventing a change
in control of StarMedia. All outstanding shares of preferred stock will be
automatically converted into common stock upon the closing of this offering. We
have no current plans to issue any additional shares of preferred stock.
 
                              REGISTRATION RIGHTS
 
    Under the terms of an amended and restated registration rights agreement, at
any time on or after the first anniversary of the effective date of this
offering, each of Chase Venture Capital Associates, Warburg, Pincus Equity
Partners and the holders of a majority of the outstanding shares of common stock
issuable after conversion of the shares of our preferred stock held by parties
to such agreement may, on one occasion only, require us to register for sale all
or any portion of the shares of common stock issuable upon conversion of the
preferred shares held by them. We are also obligated to register any of the
shares of common stock issuable upon conversion of the preferred shares held by
parties to the registration rights agreement if they request to be included in
the registration. These parties, in the aggregate, have three
 
                                       55

demand registration rights. Further, if we become eligible to file registration
statements on Form S-3, a holder of our preferred stock which is a party to the
registration rights agreement may require us to file a registration statement on
Form S-3 under the Securities Act with respect to the shares of common stock
issuable upon conversion of its preferred stock. We are also obligated to
register the shares of common stock issuable upon conversion of the preferred
shares held by parties to the registration rights agreement if they request to
be included in the registration, provided that we will not be required to effect
any Form S-3 registration more than once in any 180-day period. In addition,
holders of preferred stock which are parties to the registration rights
agreement will be entitled to piggyback registration rights for the common stock
issuable upon conversion of their preferred stock in connection with any
registration of our stock for our own account or the account of other
stockholders. Mr. Espuelas and Mr. Chen may also participate in any demand, S-3
or piggyback registration.
 
    The foregoing registration rights are subject to certain conditions and
limitations, including:
 
    - the right of the underwriters in any underwritten offering to limit the
      number of shares of common stock held by stockholders with registration
      rights to be included in such registration; and
 
    - our right to delay for up to 90 days the filing or effectiveness of a
      registration statement pursuant to a demand for registration if the board
      of directors of determines that the registration would not be in our best
      interest at such time.
 
    We are generally required to bear all of the expenses of all registrations,
except underwriting discounts and commissions. Registration of any of the shares
of common stock held by stockholders with registration rights would result in
such shares becoming freely tradable without restriction under the Securities
Act immediately after effectiveness of the registration. We have agreed to
indemnify the holders of registration rights in connection with demand, S-3 and
piggyback registration under certain circumstances.
 
ANTI-TAKEOVER EFFECTS OF CERTAIN PROVISIONS OF DELAWARE LAW AND OUR AMENDED AND
  RESTATED CERTIFICATE OF INCORPORATION AND BYLAWS
 
    Certain provisions of our amended and restated certificate of incorporation
and amended and restated bylaws, which provisions are summarized in the
following paragraphs, may be deemed to have an anti-takeover effect and may
delay, defer or prevent a tender offer or takeover attempt that a stockholder
might consider it its best interest, including those attempts that might result
in a premium over the market price for the shares held by stockholders.
 
CLASSIFIED BOARD OF DIRECTORS
 
    Our board of directors is divided into three classes of directors serving
staggered three-year terms. As a result, approximately one-third of the board of
directors will be elected each year. These provisions, when coupled with the
provision of our amended and restated certificate of incorporation authorizing
the board of directors to fill vacant directorships or increase the size of the
board of directors, may delay a stockholder from removing incumbent directors
and simultaneously gaining control of the board of directors by filling the
vacancies created by such removal with its own nominees.
 
CUMULATIVE VOTING
 
    Our amended and restated certificate of incorporation expressly denies
stockholders the right to cumulate votes in the election of directors.
 
STOCKHOLDER ACTION; SPECIAL MEETING OF STOCKHOLDERS
 
    Our amended and restated certificate of incorporation eliminates the ability
of stockholders to act by written consent. It further provides that special
meetings of our stockholders may be called only by the
 
                                       56

chairman of the board of directors or a majority of the board of directors.
 
ADVANCE NOTICE REQUIREMENTS FOR STOCKHOLDER PROPOSALS AND DIRECTORS NOMINATIONS
 
    Our amended and restated bylaws provide that stockholders seeking to bring
business before an annual meeting of stockholders, or to nominate candidates for
election as directors at an annual meeting of stockholders, must provide timely
notice thereof in writing. To be timely, a stockholder's notice must be
delivered to or mailed and received at our principal executive offices not less
than 60 days nor more than 90 days prior to the anniversary date of the
immediately preceding annual meeting of stockholders; provided, that in the
event that the annual meeting is called for a date that is not within thirty
(30) days before or after such anniversary date, notice by the stockholder in
order to be timely must be received not later than the close of business on the
tenth day following the date on which notice of the date of the annual meeting
was mailed to stockholders or made public, whichever first occurs. In the case
of a special meeting of stockholders called for the purpose of electing
directors, notice by the stockholder in order to be timely must be received not
later than the close of business on the tenth day following the day on which
notice was mailed or public disclosure of the date of the special meeting was
made, whichever first occurs. Our amended and restated bylaws also specify
certain requirements as to the form and content of a stockholder's notice. These
provisions may preclude stockholders from bringing matters before an annual
meeting of stockholders or from making nominations for directors at an annual
meeting of stockholders.
 
AUTHORIZED BUT UNISSUED SHARES
 
    The authorized but unissued shares of common stock and preferred stock are
available for future issuance without stockholder approval. These additional
shares may be utilized for a variety of corporate purposes, including future
public offerings to raise additional capital, corporate acquisitions and
employee benefit plans. The existence of authorized but unissued shares of
common stock and preferred stock could render more difficult or discourage an
attempt to obtain control of us by means of a proxy contest, tender offer,
merger or otherwise.
 
    The Delaware General Corporate Law provides generally that the affirmative
vote of a majority of the shares entitled to vote on any matter is required to
amend a corporation's certificate of incorporation or bylaws, unless a
corporation's certificate of incorporation or bylaws, as the case may be,
requires a greater percentage. Our amended and restated certificate of
incorporation imposes supermajority vote requirements in connection with certain
business combination transactions and the amendment of certain provisions of our
amended and restated certificate of incorporation and amended and restated
bylaws, including those provisions relating to the classified board of
directors, action by written consent and special meetings by stockholders.
 
                          TRANSFER AGENT AND REGISTRAR
 
    The Transfer Agent and Registrar for StarMedia's common stock is American
Stock Transfer & Trust Company, New York, New York.
 
                                    LISTING
 
    We have applied to list our common stock on the Nasdaq National Market under
the trading symbol "STRM".
 
                                       57

                        SHARES ELIGIBLE FOR FUTURE SALE
 
    Sales of substantial amounts of our common stock in the public market could
adversely affect prevailing market prices of our common stock. Furthermore,
since no shares will be available for sale shortly after this offering because
of certain contractual and legal restrictions on resale described below, sales
of substantial amounts of common stock in the public market after these
restrictions lapse could adversely affect the prevailing market price and our
ability to raise equity capital in the future.
 
    Upon completion of this offering, we will have outstanding an aggregate of
      shares of our common stock, assuming no exercise of the underwriters'
over-allotment option and no exercise of outstanding options. Of these shares,
all of the shares sold in this offering will be freely tradable without
restriction or further registration under the Securities Act, unless such shares
are purchased by "affiliates" as that term is defined in Rule 144 under the
Securities Act. The remaining 42,423,667 shares of common stock held by existing
stockholders are "restricted securities" as that term is defined in Rule 144
under the Securities Act. Restricted securities may be sold in the public market
only if registered or if they qualify for an exemption from registration under
Rule 144 or 701 under the Securities Act, which rules are summarized below.
 
                               LOCK-UP AGREEMENTS
 
    All of our officers, directors and certain of our stockholders have signed
lock-up agreements under which they agreed not to transfer or dispose of,
directly or indirectly, any shares of common stock or any securities convertible
into or exercisable or exchangeable for shares of common stock, for a period of
180 days after the date of this prospectus. Transfers or dispositions can be
made sooner:
 
    - with the prior written consent of Goldman, Sachs & Co.;
 
    - in the case of certain transfers to affiliates;
 
    - as a bona fide gift; or
 
    - to any trust.
 
    Subject to the provisions of Rule 144, 144(k) and 701, restricted shares
totaling 42,423,667 will be available for sale in the public market, subject in
the case of shares held by affiliates to compliance with certain volume
restrictions, 180 days after the date of this prospectus.
 
                                    RULE 144
 
    In general, under Rule 144 as currently in effect, beginning 90 days after
the date of this prospectus, a person who has beneficially owned shares of our
common stock for at least one year would be entitled to sell within any
three-month period a number of shares that does not exceed the greater of:
 
    - 1% of the number of shares of common stock then outstanding, which will
      equal approximately       shares immediately after this offering; or
 
    - the average weekly trading volume of the common stock on the Nasdaq
      National Market during the four calendar weeks preceding the filing of a
      notice on Form 144 with respect to such sale.
 
    Sales under Rule 144 are also subject to certain manner of sale provisions
and notice requirements and to the availability of current public information
about us.
 
                                  RULE 144(K)
 
    Under Rule 144(k), a person who is not one of our affiliates at any time
during the three months preceding a sale, and who has beneficially owned the
shares proposed to be sold for at least two years, including the holding period
of any prior owner other than an affiliate, is entitled to sell such shares
without complying with the manner of sale, public information, volume limitation
or notice provisions of Rule 144. Therefore, unless otherwise restricted,
"144(k) shares" may be
 
                                       58

sold immediately upon the completion of this offering.
 
                                    RULE 701
 
    In general, under Rule 701 of the Securities Act as currently in effect,
each of our employees, consultants or advisors who purchases shares from us in
connection with a compensatory stock plan or other written agreement is eligible
to resell such shares 90 days after the effective date of this offering in
reliance on Rule 144, but without compliance with certain restrictions,
including the holding period, contained in Rule 144.
 
                              REGISTRATION RIGHTS
 
    Upon completion of this offering, the holders of 38,290,000 shares of our
common stock, or their transferees will be entitled to certain rights with
respect to the registration of such shares under the Securities Act. Please see
"Description of Capital Stock-Registration Rights".
 
                                  STOCK PLANS
 
    Immediately after this offering, we intend to file a registration statement
under the Securities Act covering 17,000,000 shares of common stock reserved for
issuance under our 1997 and 1998 Plans and 349,933 shares reserved for issuance
under our other non-qualified options. This registration statement is expected
to be filed as soon as practicable after the effective date of this offering.
 
    At December 31, 1998, options to purchase 6,131,933 shares were issued and
outstanding under our Plans and otherwise. All of these shares will be eligible
for sale in the public market from time to time, subject to vesting provisions,
Rule 144 volume limitations applicable to our affiliates and, in the case of
some of the options, the expiration of lock-up agreements.
 
                            VALIDITY OF COMMON STOCK
 
    The validity of the common stock offered hereby will be passed upon for
StarMedia by Brobeck, Phleger & Harrison LLP, New York, New York and for the
underwriters by Ropes & Gray, Boston, Massachusetts.
 
                                    EXPERTS
 
    Ernst & Young LLP, independent auditors, have audited our consolidated
financial statements and schedule at December 31, 1997 and 1998, and for the
period from March 5, 1996 (date of inception) to December 31, 1996 and the years
ended December 31, 1997 and 1998 as set forth in their reports. We have included
our financial statements and schedule in the prospectus and elsewhere in the
registration statement in reliance on Ernst & Young LLP's report, given on their
authority as experts in accounting and auditing.
 
                             AVAILABLE INFORMATION
 
    We have filed with the Securities and Exchange Commission a registration
statement on Form S-1 (including exhibits and schedules thereto) under the
Securities Act with respect to the common stock to be sold in this offering.
This prospectus, which constitutes a part of the registration statement, does
not contain all of the information set forth in the registration statement or
the exhibits and schedules which are part of the registration statement. For
further information with respect to StarMedia and the common stock, reference is
made to the registration statement and the exhibits and schedules thereto.
Statements
 
                                       59

contained in this prospectus as to the contents of any contract, agreement or
other document referred to are not necessarily complete, and in each case
reference is made to the copy of such contract, agreement or other document
filed as an exhibit to the registration statement for a more complete
description of the matter involved, and each such statement is qualified in its
entirety by such reference.
 
    You may read and copy all or any portion of the registration statement or
any reports, statements or other information in StarMedia's files in the
Commission's public reference room at Room 1024, Judiciary Plaza, 450 Fifth
Street, N.W., Washington, D.C., 20549 and at the regional offices of the
Commission located at Seven World Trade Center, 13th Floor, New York, New York
10048 and 500 West Madison Street, Suite 1400, Chicago, Illinois 60661. You can
request copies of these documents upon payment of a duplicating fee, by writing
to the Commission. Please call the Commission at 1-800-SEC-0330 for further
information on the operation of the public reference rooms. StarMedia's
Commission filings, including the registration statement, will also be available
to you on the Commission's Internet site (http://www.sec.gov).
 
    We intend to furnish to our stockholders with annual reports containing
financial statements audited by our independent auditors and to make available
to our stockholders quarterly reports containing unaudited financial data for
the first three quarters of each fiscal year.
 
                                       60

                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
                            STARMEDIA NETWORK, INC.
 

                                                                               
Report of Independent Auditors..................................................        F-2
 
Consolidated Balance Sheets as of December 31, 1997 and 1998....................        F-3
 
Consolidated Statements of Operations for the period from March 5, 1996 (date of
  inception) to December 31, 1996 and the years ended December 31, 1997 and
  1998..........................................................................        F-4
 
Consolidated Statements of Changes in Stockholders' Deficit for the period from
  March 5, 1996 (date of inception) to December 31, 1996 and the years ended
  December 31, 1997 and 1998....................................................        F-5
 
Consolidated Statements of Cash Flows for the period from March 5, 1996 (date of
  inception) to December 31, 1996 and the years ended December 31, 1997 and
  1998..........................................................................        F-6
 
                                                                                      F-7 -
Notes to Consolidated Financial Statements......................................       F-16

 
                                      F-1

                         REPORT OF INDEPENDENT AUDITORS
 
Board of Directors and Stockholders
StarMedia Network, Inc.
 
    We have audited the accompanying consolidated balance sheets of StarMedia
Network, Inc. (the "Company") as of December 31, 1997 and 1998, and the related
consolidated statements of operations, changes in stockholders' deficit and cash
flows for the period from March 5, 1996 (date of inception) to December 31, 1996
and the years ended December 31, 1997 and 1998. These consolidated financial
statements are the responsibility of the Company's management. Our
responsibility is to express an opinion on these financial statements based on
our audits.
 
    We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
    In our opinion, the consolidated financial statements referred to above
present fairly, in all material respects, the consolidated financial position of
StarMedia Network, Inc. at December 31, 1997 and 1998 and the results of their
operations and their cash flows for the period from March 5, 1996 (date of
inception) to December 31, 1996 and the years ended December 31, 1997 and 1998
in conformity with generally accepted accounting principles.
 
                                                               ERNST & YOUNG LLP
 
                                         /s/ Ernst & Young LLP
 
New York, New York
March 5, 1999,
 
  except for Note 10, as
  to which the date is
  March 14, 1999
 
                                      F-2

                            STARMEDIA NETWORK, INC.
 
                          CONSOLIDATED BALANCE SHEETS
 


                                                                              DECEMBER 31           PRO FORMA
                                                                       -------------------------   DECEMBER 31
                                                                          1997          1998          1998
                                                                       -----------  ------------  -------------
                                                                                         
                                                                                                   (UNAUDITED)
ASSETS
Current assets:
  Cash and cash equivalents..........................................  $   436,000  $ 53,141,000   $53,141,000
  Accounts receivable net of allowance for bad debts of $0 and
    $60,000 as of December 31, 1997 and 1998, respectively...........       27,000       460,000       460,000
  Other current assets...............................................        7,000     1,674,000     1,674,000
                                                                       -----------  ------------  -------------
Total current assets.................................................      470,000    55,275,000    55,275,000
 
Fixed assets, net....................................................      263,000     5,403,000     5,403,000
Intangible assets, net of accumulated amortization of $1,000 and
  $93,000 as of December 31, 1997 and 1998, respectively.............       30,000       179,000       179,000
Other assets.........................................................       23,000       129,000       129,000
                                                                       -----------  ------------  -------------
                                                                       $   786,000  $ 60,986,000   $60,986,000
                                                                       -----------  ------------  -------------
                                                                       -----------  ------------  -------------
 
LIABILITIES AND STOCKHOLDERS' DEFICIT
Current liabilities:
  Accounts payable and accrued expenses..............................  $   227,000  $  6,728,000   $ 6,728,000
  Due to principal stockholders......................................       67,000
  Capital lease obligations, current portion.........................       10,000       220,000       220,000
  Deferred revenues..................................................       20,000       815,000       815,000
                                                                       -----------  ------------  -------------
Total current liabilities............................................      324,000     7,763,000     7,763,000
 
Capital lease obligations............................................        8,000
Deferred rent........................................................       21,000       122,000       122,000
Preferred stock, authorized 60,000,000 shares:
  Series A Redeemable Convertible Preferred Stock, $.001 par value,
    7,330,000 shares authorized, 7,330,000 shares issued and
    outstanding at December 31, 1997 and 1998, respectively, stated
    at liquidation value, net of related expenses....................    3,833,000     4,218,000
  Series B Redeemable Convertible Preferred Stock, $.001 par value,
    8,000,000 shares authorized, 8,000,000 shares issued and
    outstanding at December 31, 1997 and 1998, respectively, stated
    at liquidation value, net of related expenses....................                 12,944,000
  Series C Redeemable Convertible Preferred Stock, $.001 par value,
    16,666,667 shares authorized, 16,666,667 shares issued and
    outstanding at December 31, 1997 and 1998, respectively, stated
    at liquidation value, net of related expenses....................                 79,332,000
Stockholders' deficit:
  Common stock, $.001 par value, 100,000,000 shares authorized,
    10,012,000 shares and 10,392,000 shares issued and outstanding at
    December 31, 1997 and 1998, respectively, and 42,388,667 shares
    outstanding on a pro forma basis.................................       10,000        10,000        42,000
  Additional paid-in capital.........................................      431,000    19,563,000   116,025,000
  Deferred compensation..............................................                 (8,666,000)   (8,666,000)
  Other comprehensive loss...........................................                    (37,000)      (37,000)
  Accumulated deficit................................................   (3,841,000)  (54,263,000)  (54,263,000)
                                                                       -----------  ------------  -------------
Total stockholders' (deficit)........................................   (3,400,000)  (43,393,000)   53,101,000
                                                                       -----------  ------------  -------------
Total liabilities and stockholders' deficit..........................  $   786,000  $ 60,986,000   $60,986,000
                                                                       -----------  ------------  -------------
                                                                       -----------  ------------  -------------

 
SEE ACCOMPANYING NOTES.
 
                                      F-3

                            STARMEDIA NETWORK, INC.
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 


                                                                   PERIOD FROM
                                                                   MARCH 5,1996
                                                                     (DATE OF
                                                                  INCEPTION) TO       YEAR ENDED DECEMBER 31
                                                                     DECEMBER     -------------------------------
                                                                     31, 1996          1997            1998
                                                                  --------------  --------------  ---------------
                                                                                         
Revenues........................................................   $              $      460,000  $     5,329,000
 
Operating expenses:
  Product and technology development............................         36,000        1,229,000        6,816,000
  Sales and marketing...........................................         12,000        2,108,000       29,274,000
  General and administrative....................................         78,000          648,000        4,600,000
  Depreciation and amortization.................................          2,000           38,000          774,000
  Stock-based compensation expense..............................                                       10,421,000
                                                                  --------------  --------------  ---------------
Total operating expenses........................................        128,000        4,023,000       51,885,000
                                                                  --------------  --------------  ---------------
Loss from operations............................................       (128,000)      (3,563,000)     (46,556,000)
 
Other income (expense):
  Interest income...............................................                          35,000          715,000
  Interest expense..............................................                                          (45,000)
                                                                  --------------  --------------  ---------------
Net loss........................................................       (128,000)      (3,528,000)     (45,886,000)
Preferred stock dividends and accretion.........................             --         (185,000)      (4,536,000)
                                                                  --------------  --------------  ---------------
Net loss available to common shareholders.......................   $   (128,000)  $   (3,713,000) $   (50,422,000)
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------
Historical basic and diluted net loss per common share..........   $      (0.01)  $        (0.37) $         (4.94)
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------
Historical number of shares used in computing basic and diluted
  net loss per share............................................      9,147,223       10,012,000       10,202,000
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------
Pro forma basic and diluted net loss per share..................                                  $         (1.09)
                                                                                                  ---------------
                                                                                                  ---------------
Number of shares used in computing pro forma basic and diluted
  net loss per share............................................                                       42,198,667
                                                                                                  ---------------
                                                                                                  ---------------

 
SEE ACCOMPANYING NOTES.
 
                                      F-4

                            STARMEDIA NETWORK, INC.
 
          CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' DEFICIT
 


                              COMMON STOCK        ADDITIONAL                                       OTHER
                         -----------------------    PAID-IN     ACCUMULATED      DEFERRED      COMPREHENSIVE
                           SHARES      AMOUNT       CAPITAL       DEFICIT      COMPENSATION       INCOME          TOTAL
                         ----------  -----------  -----------  -------------  --------------  ---------------  ------------
                                                                                          
Balance at March 5,
  1996 (date of
  inception)...........               $           $             $              $                 $             $
Sale of common stock...  10,012,000      10,000       431,000                                                       441,000
Net loss for the
  period...............                                            (128,000)                                       (128,000)
                         ----------  -----------  -----------  -------------  --------------  ---------------  ------------
Balance at December 31,
  1996.................  10,012,000      10,000       431,000      (128,000)                                        313,000
Accretion of preferred
  stock................                                            (185,000)                                       (185,000)
Net loss for the
  year.................                                          (3,528,000)                                     (3,528,000)
                         ----------  -----------  -----------  -------------  --------------  ---------------  ------------
Balance at December 31,
  1997.................  10,012,000      10,000       431,000    (3,841,000)                                     (3,400,000)
Deferred compensation
  related to stock
  options, net of
  cancellations........                            19,087,000                   (19,087,000)
Amortization of
  deferred
  compensation.........                                                          10,421,000                      10,421,000
Exercise of common
  stock options........     380,000                    45,000                                                        45,000
Preferred stock
  dividends and
  accretion............                                          (4,536,000)                                     (4,536,000)
Net loss for the
  year.................                                         (45,886,000)                                    (45,886,000)
Translation
  adjustment...........                                                                            (37,000)         (37,000)
                                                                                                               ------------
Comprehensive loss.....                                                                                         (45,923,000)
                         ----------  -----------  -----------  -------------  --------------  ---------------  ------------
Balance at December 31,
  1998.................  10,392,000   $  10,000   $19,563,000   $(54,263,000)  $ (8,666,000)     $ (37,000)    $(43,393,000)
                         ----------  -----------  -----------  -------------  --------------  ---------------  ------------
                         ----------  -----------  -----------  -------------  --------------  ---------------  ------------

 
SEE ACCOMPANYING NOTES.
 
                                      F-5

                            STARMEDIA NETWORK, INC.
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 


                                                                   PERIOD FROM
                                                                  MARCH 5, 1996
                                                                     (DATE OF
                                                                  INCEPTION) TO       YEAR ENDED DECEMBER 31
                                                                     DECEMBER     -------------------------------
                                                                     31, 1996          1997            1998
                                                                  --------------  --------------  ---------------
                                                                                         
OPERATING ACTIVITIES
Net loss........................................................   $   (128,000)  $   (3,528,000) $   (45,886,000)
Adjustments to reconcile net loss to net cash used in operating
  activities:
    Depreciation and amortization...............................          1,000           38,000          774,000
    Provision for bad debts.....................................                                           60,000
    Amortization of deferred compensation.......................                                       10,421,000
    Deferred rent...............................................                          21,000          101,000
    Changes in operating assets and liabilities:
      Accounts receivable.......................................                         (27,000)        (493,000)
      Other assets..............................................                         (30,000)      (1,773,000)
      Accounts payable and accrued expenses.....................                         227,000        5,356,000
      Deferred revenues.........................................                          20,000          795,000
                                                                  --------------  --------------  ---------------
Net cash used in operating activities...........................       (127,000)      (3,279,000)     (30,645,000)
 
INVESTING ACTIVITIES
Purchase of fixed assets........................................        (30,000)        (249,000)      (4,395,000)
Intangible assets...............................................                         (31,000)        (241,000)
                                                                  --------------  --------------  ---------------
Net cash used in investing activities...........................        (30,000)        (280,000)      (4,636,000)
 
FINANCING ACTIVITIES
Issuance of common stock........................................        441,000                            45,000
Issuance of redeemable convertible preferred stock, net of
  related expenses..............................................                       3,647,000       88,125,000
Issuance of convertible subordinated notes......................                                        6,000,000
Repayment of convertible subordinated notes.....................                                       (6,000,000)
(Loans) repayments (to) from stockholders.......................        (54,000)         121,000          (67,000)
Payments under capital leases...................................                          (3,000)        (112,000)
                                                                  --------------  --------------  ---------------
Net cash provided by financing activities.......................        387,000        3,765,000       87,991,000
Effect of exchange rate changes on cash and cash equivalents....                                           (5,000)
                                                                  --------------  --------------  ---------------
Net increase in cash and cash equivalents.......................        230,000          206,000       52,705,000
Cash and cash equivalents, beginning of period..................                         230,000          436,000
                                                                  --------------  --------------  ---------------
Cash and cash equivalents, end of period........................   $    230,000   $      436,000  $    53,141,000
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION
Interest paid...................................................   $              $               $        45,000
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------
NON-CASH FINANCING ACTIVITIES
Acquisition of fixed assets through capital leases..............   $              $       21,000  $       314,000
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------

 
SEE ACCOMPANYING NOTES.
 
                                      F-6

                            STARMEDIA NETWORK, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                 PERIOD FROM MARCH 5, 1996 (DATE OF INCEPTION)
                    TO DECEMBER 31, 1996 AND THE YEARS ENDED
                           DECEMBER 31, 1997 AND 1998
 
1. SIGNIFICANT ACCOUNTING POLICIES
 
CONSOLIDATION AND DESCRIPTION OF BUSINESS
 
The accompanying consolidated financial statements include the accounts of
StarMedia Network, Inc. and its wholly-owned subsidiaries (collectively, the
"Company"). All intercompany account balances and transactions have been
eliminated in consolidation. StarMedia Network, Inc. was incorporated under
Delaware law in March 1996.
 
The Company develops and maintains www.starmedia.com, a branded Internet online
network (the "Network") located on the World Wide Web (the "Web"). The Network
is organized around interest specific channels, community features, search
capabilities and online shopping in Spanish and Portuguese, targeted to Latin
America.
 
INITIAL PUBLIC OFFERING AND UNAUDITED PRO FORMA BALANCE SHEET (UNAUDITED)
 
In February 1999, the Board of Directors authorized the filing of a registration
statement with the Securities and Exchange Commission ("SEC") that would permit
the Company to sell shares of the Company's common stock in connection with a
proposed initial public offering ("IPO"). In conjunction with a qualified IPO,
all outstanding shares of Series A, B and C Redeemable Convertible Preferred
Stock, automatically convert into shares of Common Stock on a one for one basis.
Accordingly, the effect of the conversions has been reflected in the
accompanying unaudited pro forma balance sheet as if they had occurred as of
December 31, 1998.
 
REVENUE RECOGNITION
 
The Company's revenues are derived principally from the sale of banner
advertisements and sponsorships, some of which also involve more integration,
design and coordination of the customer's content with the Company's services,
such as the placement of sponsor buttons in specific areas of the Network. The
sponsor buttons generally provide users with direct links to sponsor homepages
that exist within the Network which are usually focused on selling sponsor
merchandise and services to users of the Network. Advertising revenues on both
banner and sponsorship contracts are recognized ratably in the period in which
the advertisement is displayed, provided that no significant Company obligations
remain and collection of the resulting receivable is probable. Company
obligations typically include guarantees of minimum number of "impressions," or
times that an advertisement appears in pages viewed by users of the Company's
Network. To the extent minimum guaranteed impressions are not met, the Company
defers recognition of the corresponding revenues until the remaining guaranteed
impression levels are achieved. The Company also earns revenues on sponsorship
contracts for fees relating to the design, coordination, and integration of the
customer's content. Revenue related to the design, coordination and integration
of the customers' content are recognized ratably over the term of the contract
or using the percentage of completion method if the fee for such services is
fixed. A number of the Company's agreements provide for the Company to receive
revenues from electronic commerce transactions. These revenues are recognized by
the Company upon notification from the advertiser of revenues earned by the
Company and, to date, have not been significant.
 
                                      F-7

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
1. SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
Revenues from barter transactions are recognized during the period in which the
advertisements are displayed on the Company's Network. Barter transactions are
recorded at the lower of estimated fair value of the goods or services received
or the estimated fair value of the advertisements given. For the year ended
December 31, 1997, substantially all of the Company's revenues were derived from
barter transactions. For the year ended December 31, 1998, revenues derived from
barter transactions, were approximately $2.4 million.
 
Deferred revenues are primarily comprised of billings in excess of recognized
revenues relating to advertising contracts and sponsorship and banner
advertising contracts.
 
PRODUCT DEVELOPMENT
 
Costs incurred in the classification and organization of listings within the
Network and the development of new products and enhancements to existing
products are charged to expense as incurred. Statement of Financial Accounting
Standards ("SFAS") No. 86, "Accounting for the Costs of Computer Software to be
Sold, Leased or Otherwise Marketed," requires capitalization of certain software
development costs subsequent to the establishment of technological feasibility.
Based upon the Company's product development process, technological feasibility
is established upon completion of a working model. Costs incurred by the Company
between completion of the working model and the point at which the product is
ready for general release have been insignificant.
 
CASH AND CASH EQUIVALENTS
 
The Company considers all financial instruments with a maturity of three months
or less when purchased to be cash equivalents. Such amounts are stated at cost
which approximates market value.
 
FIXED ASSETS
 
Fixed assets, including those acquired under capital leases, are stated at cost
and depreciated by the straight-line method over the estimated useful lives of
the assets, which range from three to five years. Leasehold improvements are
amortized over the lesser of the useful life of the asset or the remaining
period of the lease.
 
INTANGIBLE ASSETS
 
Intangible assets consist of trademarks and trade names and are being amortized
on a straight-line basis over a period of five years.
 
INCOME TAXES
 
The Company uses the liability method of accounting for income taxes, whereby
deferred income taxes are provided on items recognized for financial reporting
purposes over different periods than for income tax purposes. Valuation
allowances are provided when the expected realization of tax assets does not
meet a more likely than not criteria.
 
                                      F-8

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
1. SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
ADVERTISING COSTS
 
Advertising costs are expensed as incurred. For the period from March 5, 1996
(date of inception) to December 31, 1996 and the years ended December 31, 1997
and 1998, advertising expense amounted to approximately $0, $1,610,000 and
$21,246,000, respectively.
 
USE OF ESTIMATES
 
The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions that
affect the amounts reported in the financial statements and footnotes thereto.
Actual results could differ from those estimates.
 
STOCK-BASED COMPENSATION
 
The Company grants stock options generally for a fixed number of shares to
certain employees with an exercise price equal to or below the fair value of the
shares at the date of grant. The Company accounts for stock option grants in
accordance with Accounting Principles Board ("APB") Opinion No. 25, "Accounting
for Stock Issued to Employees", and, accordingly, recognizes compensation
expense only if the fair value of the underlying Common Stock exceeds the
exercise price of the stock option on the date of grant. In October 1995, the
FASB issued SFAS No. 123, "Accounting for Stock-Based Compensation" ("SFAS No.
123"), which provides an alternative to APB Opinion No. 25 in accounting for
stock-based compensation. As permitted by SFAS No. 123, the Company continues to
account for stock-based compensation in accordance with APB Opinion No. 25 and
has elected the pro forma disclosure alternative of SFAS No. 123 (see Note 5).
 
COMPUTATION OF HISTORICAL NET LOSS PER SHARE
 
The Company calculates earnings per share in accordance with SFAS No. 128,
"Computation of Earnings Per Share" and SEC Staff Accounting Bulletin No. 98.
Accordingly, basic earnings per share is computed using the weighted average
number of common and dilutive common equivalent shares outstanding during the
period. Common equivalent shares consist of the incremental common shares
issuable upon the conversion of the Preferred Stock (using the if-converted
method) and shares issuable upon the exercise of stock options (using the
treasury stock method); common equivalent shares are excluded from the
calculation if their effect is anti-dilutive.
 
CONCENTRATIONS OF CREDIT RISK
 
Financial instruments that potentially subject the Company to significant
concentrations of credit risk consist principally of cash and cash equivalents
and accounts receivable. The Company maintains the majority of its cash and cash
equivalents with one financial institution. The Company's sales are primarily to
companies located in the United States and Latin American region. The Company
performs periodic credit evaluations of its customers' financial condition and
does not require collateral. Accounts receivable are due principally from large
U.S. companies under stated contract terms and the Company provides for
estimated credit losses at the time of sale. Such losses have not been
significant to date.
 
                                      F-9

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
1. SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)
FAIR VALUE OF FINANCIAL INSTRUMENTS
 
The carrying amounts reported in the consolidated balance sheets for cash and
cash equivalents, accounts receivable and accounts payable approximate their
fair values.
 
FOREIGN CURRENCY AND INTERNATIONAL OPERATIONS
 
The functional currency of the Company's active subsidiaries in Argentina,
Brazil, Chile and Colombia is the local currency. The financial statements of
these subsidiaries are translated to U.S. dollars using year-end rates of
exchange for assets and liabilities, and average rates for the year for
revenues, costs, and expenses. Translation gains and losses are deferred and
accumulated as a component of stockholders' deficit. The functional currency of
the Company's subsidiaries in highly inflationary economies, Mexico, Uruguay,
and Venezuela, is the U.S. dollar. Accordingly, for those subsidiaries that use
U.S. dollars as the functional currency, monetary assets and liabilities are
translated using the current exchange rate in effect at the year-end date, while
nonmonetary assets and liabilities are translated at historical rates.
Operations are generally translated at the weighted average exchange rate in
effect during the period. The resulting foreign exchange gains and losses are
recorded in the consolidated statement of operations. Revenues earned by the
Company's foreign subsidiaries and assets of such foreign subsidiaries were not
significant for all periods presented or at December 31, 1997 and 1998.
 
COMPREHENSIVE INCOME
 
The Company reports comprehensive income in accordance with SFAS No. 130,
"Reporting Comprehensive Income". SFAS No. 130 establishes rules for the
reporting and display of comprehensive income and its components. SFAS No. 130
requires foreign currency translation adjustments to be included in other
comprehensive loss.
 
SEGMENT INFORMATION
 
The Company discloses information regarding segments in accordance with SFAS No.
131, "Disclosures about Segments of an Enterprise and Related Information". SFAS
No. 131 establishes standards for reporting of financial information about
operating segments in annual financial statements and requires reporting
selected information about operating segments in interim financial reports. The
disclosure of segment information was not required as the Company operates in
only one business segment.
 
    As of and for the period and years ended December 31, 1996, 1997 and 1998,
substantially all of the Company's assets were located in the U.S. and the
Company derived substantially all of its revenue from businesses located in the
U.S.
 
                                      F-10

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
2. FIXED ASSETS
 
    Fixed assets consist of the following:
 


                                                                           DECEMBER 31
                                                                    --------------------------
                                                                       1997          1998
                                                                    -----------  -------------
                                                                           
Computer equipment................................................  $   172,000  $   4,638,000
Furniture and fixtures............................................        7,000        446,000
Leasehold improvements............................................      121,000      1,038,000
                                                                    -----------  -------------
                                                                        300,000      6,122,000
Less accumulated depreciation and amortization....................      (37,000)      (719,000)
                                                                    -----------  -------------
                                                                    $   263,000  $   5,403,000
                                                                    -----------  -------------
                                                                    -----------  -------------

 
3. STOCKHOLDERS' DEFICIT
 
REDEEMABLE CONVERTIBLE PREFERRED STOCK
 
In July 1997, the Company sold 7,330,000 shares of Series A Redeemable
Convertible Preferred Stock (the "Series A Preferred") for $3,665,000, or $.50
per share. In February 1998, the Company sold 8,000,000 shares of Series B
Redeemable Convertible Stock (the "Series B Preferred") for $12,000,000, or
$1.50 per share. In August and September 1998, the Company sold an aggregate
16,666,667 shares of Series C Redeemable Convertible Preferred Stock (the
"Series C Preferred") for $80,000,000, or $4.80 per share. The Series A
Preferred, Series B Preferred and the Series C Preferred (collectively, the
"Preferred Stock") are convertible into common stock on a one for one basis,
subject to certain anti-dilution provisions, as defined, at any time at the
option of the holder or automatically in the event of a qualified IPO. The
holders of the Preferred Stock are entitled to the number of votes equal to the
number of common shares that could be obtained upon conversion on the date of
the vote and are entitled to a discretionary noncumulative dividend.
 
Upon a liquidation, including any merger or acquisition where the existing
stockholders of the Company own less than 50% of the successor entity, the
holders of the Preferred Stock are entitled to have the Company redeem their
shares at the original price paid per share (the "Original Investment"), plus a
10% cumulative return less any dividends paid.
 
In the event that the Preferred Stock has not been converted as of December 31,
2004, the holders of the Preferred Stock can elect to have the Company redeem
their Preferred Stock for an amount equal to their original investment plus any
dividends declared but unpaid.
 
No Preferred Stock dividends have been declared or paid as of December 31, 1998.
At December 31, 1997 and 1998, total cumulative dividends in arrears, that would
be payable upon a liquidation, were approximately $183,000 and $4,233,000,
respectively.
 
The Company has recorded issuance costs incurred in connection with the
Preferred Stock as discounts at issuance and is accreting the discounts from the
date of issuance through the date of mandatory redemption on December 31, 2004.
 
                                      F-11

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
3. STOCKHOLDERS' DEFICIT (CONTINUED)
 
CONVERTIBLE SUBORDINATED NOTES
 
    In January 1998 the Company issued $4,000,000 8% convertible subordinated
notes due at the earlier of the closing of the Series B Preferred financing, or
on July 21, 1998. In August 1998 the Company issued $2,000,000 8% convertible
subordinated notes due at the earlier of the closing of the Series C Preferred
financing or on December 31, 1998. All amounts outstanding were repaid during
1998 in accordance with their terms.
 
4. LOSS PER SHARE
 
    The following table sets forth the computation of basic and diluted earnings
per share:
 


                                                                   PERIOD FROM
                                                                  MARCH 5, 1996
                                                                     (DATE OF
                                                                  INCEPTION) TO       YEAR ENDED DECEMBER 31
                                                                     DECEMBER     -------------------------------
                                                                     31, 1996          1997            1998
                                                                  --------------  --------------  ---------------
                                                                                         
Numerator:
  Net loss......................................................   $   (128,000)  $   (3,528,000) $   (45,886,000)
  Preferred stock dividends and accretion.......................             --         (185,000)      (4,536,000)
                                                                  --------------  --------------  ---------------
Numerator for basic and diluted loss per share--net loss
  available for common stockholders.............................   $   (128,000)  $   (3,713,000) $   (50,422,000)
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------
Denominator:
  Denominator for basic and dilutive loss per share-- weighted
    average shares..............................................      9,147,223       10,012,000       10,202,000
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------
Basic and diluted net loss per share............................   $      (0.01)  $        (0.37) $         (4.94)
                                                                  --------------  --------------  ---------------
                                                                  --------------  --------------  ---------------

 
    Diluted net loss per share for the period from March 5, 1996 (date of
inception) to December 31, 1996 and the years ended December 31, 1997 and 1998,
does not include the effect of options to purchase 0, 1,804,933 and 6,131,933
shares of common stock, respectively, or 0, 7,330,000, and 31,996,667 shares of
common stock issuable upon the conversion of Preferred Stock on an "as if
converted" basis, respectively, as the effect of their inclusion is antidilutive
during each period.
 
                                      F-12

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
4. LOSS PER SHARE (CONTINUED)
    The following table sets forth the computation of the unaudited pro forma
basic and diluted loss per share, assuming conversion of the Preferred Stock as
of January 1, 1998:
 


                                                                                 YEAR ENDED
                                                                                  DECEMBER
                                                                                  31, 1998
                                                                               ---------------
                                                                            
Numerator:
  Net loss available to common stockholders..................................  $   (50,422,000)
  Preferred Stock dividends and accretion....................................        4,536,000
                                                                               ---------------
Numerator for pro forma loss available to common stockholders................  $   (45,886,000)
                                                                               ---------------
                                                                               ---------------
Denominator:
  Weighted average number of common shares...................................       10,202,000
  Assumed conversion of Preferred Stock to common shares (if converted
    method)..................................................................       31,996,667
                                                                               ---------------
Denominator for pro forma basic and diluted loss per share...................       42,198,667
                                                                               ---------------
                                                                               ---------------
Pro forma basic and diluted net loss per share...............................  $         (1.09)
                                                                               ---------------
                                                                               ---------------

 
5. STOCK OPTIONS
 
    In January 1997, the Company adopted the 1997 Stock Option Plan and, in July
1998, the Company adopted the 1998 Stock Option Plan (collectively, the "Option
Plans"). The 1997 Stock Option Plan and the 1998 Stock Plan provide for the
authorization of 10,000,000 shares. In February 1999, an additional 7,000,000
shares were reserved for issuance pursuant to the 1998 Stock Option Plan. The
Option Plans provide for the granting of incentive stock options or
non-qualified stock options to purchase common stock to eligible participants.
Options granted under the Option Plan are for periods not to exceed ten years.
In July 1998, approximately 1,400,000 non-qualified options outstanding were
exchanged for incentive stock options having generally equivalent terms as the
non-qualified options.
 
    Other than options to purchase 2,000,000 and 1,500,000 shares granted in
April and December 1998, respectively, which were immediately vested, options
outstanding under the Option Plans generally vest one-third after the first year
of service and ratably each month over the next two years.
 
    In connection with the granting of stock options in 1998 and the exchange of
non-qualified options to incentive stock options, the Company recorded deferred
compensation of approximately $19,087,000. This deferred compensation is being
amortized for financial reporting purposes over the vesting period of the
options and the amount recognized as expense during the year ended December 31,
1998 amounted to approximately $10,421,000.
 
                                      F-13

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
5. STOCK OPTIONS (CONTINUED)
    The following transactions occurred with respect to the Option Plans:
 


                                                                                  WEIGHTED
                                                                                   AVERAGE
                                                                    SHARES     EXERCISE PRICE
                                                                 ------------  ---------------
                                                                         
Granted........................................................     1,814,933     $    0.42
Canceled.......................................................       (10,000)          .50
                                                                 ------------
Outstanding, December 31, 1997.................................     1,804,933           .42
Granted........................................................     6,792,000           .78
Canceled.......................................................    (2,085,000)          .50
Exercised......................................................      (380,000)          .12
                                                                 ------------
Outstanding, December 31, 1998.................................     6,131,933     $    0.81
                                                                 ------------
                                                                 ------------

 
    The following table summarizes information concerning currently outstanding
options:
 


                                                     OPTIONS OUTSTANDING
                                                -----------------------------                  OPTIONS EXERCISABLE
                                                                 WEIGHTED-                  -------------------------
                                                                  AVERAGE       WEIGHTED-                  WEIGHTED-
                   RANGE OF                                      REMAINING       AVERAGE                    AVERAGE
                   EXERCISE                        NUMBER       CONTRACTUAL     EXERCISE       NUMBER      EXERCISE
                    PRICE                       OUTSTANDING        LIFE           PRICE     OUTSTANDING      PRICE
- ----------------------------------------------  ------------  ---------------  -----------  ------------  -----------
                                                                                           
$0.50.........................................    4,415,433           6.75      $    0.50     3,062,987    $    0.50
$1.60.........................................    1,716,500           7.00      $    1.60     1,500,000    $    1.60
                                                ------------                                ------------
                                                  6,131,933                                   4,562,987
                                                ------------                                ------------
                                                ------------                                ------------

 
    Pro forma information regarding net loss is required by SFAS No. 123 and has
been determined as if the Company had accounted for its employee stock options
under the fair value method of that statement. The fair value for these options
was estimated at the date of grant using the Black-Scholes option pricing model
with the following assumptions:
 


                                 ASSUMPTIONS                                         1997              1998
- ------------------------------------------------------------------------------  ---------------  ----------------
                                                                                           
Volatility factor of the expected market price of the Company's common
  stock.......................................................................       0.000            0.000
Average risk-free interest rate...............................................    6.00%-6.40%      4.440%-5.70%
Dividend yield................................................................       0.0%              0.0%
Average life..................................................................      5 years          5 years

 
    Because the determination of fair value of all options granted after such
time as the Company becomes a public entity will include an expected volatility
factor in addition to the factors described in the preceding paragraph, the
above results may not be representative of future periods.
 
    The Black-Scholes option valuation model was developed for use in estimating
the fair value of traded options which have no vesting restrictions and are
fully transferable. In addition, option valuation models require the input of
highly subjective assumptions including the expected stock price volatility.
Because the Company's stock options have characteristics significantly different
from those of traded options, and because changes in the subjective input
assumptions can materially affect the fair value estimate, in management's
opinion, the existing models do not necessarily provide a reliable single
measure of the fair value of its stock options.
 
                                      F-14

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
5. STOCK OPTIONS (CONTINUED)
    The Company's pro forma information is as follows:
 


                                                                                        1997            1998
                                                                                   --------------  ---------------
                                                                                             
Pro forma net loss available to common stockholders..............................  $   (3,749,000) $   (51,276,000)
Pro forma basic and diluted loss per share.......................................  $        (0.37) $         (5.03)

 
6. INCOME TAXES
 
    For Federal income tax purposes at December 31, 1998, the Company had net
operating loss carryfowards of approximately $36,500,000 which expire from 2011
through 2018. The net operating loss carryforwards may be subject to Section 382
of the Internal Revenue Code, which imposes annual limitations on their
utilization. A valuation allowance has been recognized to fully offset the
deferred tax assets, after considering deferred tax liabilities.
 
    Significant components of the Company's deferred tax assets are as follows:
 


                                                                         DECEMBER 31
                                                               -------------------------------
                                                                         
                                                                    1997            1998
                                                               --------------  ---------------
Federal net operating loss carryforwards.....................  $    1,200,000  $    12,422,000
Depreciation and amortization................................          (6,000)        (227,000)
Deferred rent................................................           9,000           55,000
Other........................................................                           27,000
                                                               --------------  ---------------
                                                                    1,203,000       12,277,000
Valuation allowance..........................................      (1,203,000)     (12,277,000)
                                                               --------------  ---------------
                                                               $           --  $            --
                                                               --------------  ---------------
                                                               --------------  ---------------

 
    The effective income tax rate differs from the statutory rate as follows:
 


                                                                                   PERIOD FROM
                                                                                    MARCH 5,
                                                                                      1996
                                                                                    (DATE OF      YEAR ENDED DECEMBER
                                                                                  INCEPTION) TO            31
                                                                                  DECEMBER 31,    --------------------
                                                                                      1996          1997       1998
                                                                                 ---------------  ---------  ---------
                                                                                                    
Statutory rate.................................................................          (34%)         (34%)      (34%)
Non deductible losses from foreign operations..................................                                      2
Permanent differences..........................................................                                      8
Valuation allowance............................................................            33            33         23
Other..........................................................................             1             1          1
                                                                                        -----     ---------  ---------
Effective tax rate.............................................................           --%           --%        --%
                                                                                        -----     ---------  ---------
                                                                                        -----     ---------  ---------

 
                                      F-15

                            STARMEDIA NETWORK, INC.
 
             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)
 
7. COMMITMENTS
 
CAPITAL LEASE
 
    Included in computer equipment are assets acquired under a capital lease.
The cost of such equipment as of December 31, 1997 and 1998 is approximately
$21,000 and $335,000 and the related accumulated depreciation is approximately
$1,000 and $51,000, respectively.
 
    Future minimum lease payments under the noncancelable capital lease as of
December 31, 1998 are $231,000, including interest of $11,000, which is all due
in 1999.
 
    In connection with the capital lease the Company has a letter of credit
outstanding of approximately $144,000 at December 31, 1998.
 
OPERATING LEASES
 
    The Company rents office space under noncancelable lease agreements. The
minimum annual rental commitments under noncancelable operating leases that have
initial or remaining terms in excess of one year are as follows:
 

                                                              
Year ended December 31:
1999...........................................................  $  330,000
2000...........................................................     330,000
2001...........................................................     330,000
2002...........................................................     286,000
2003...........................................................     182,000
                                                                 ----------
                                                                 $1,458,000
                                                                 ----------
                                                                 ----------

 
    Rent expense amounted to approximately $0, $66,000 and $392,000 for the
period from March 5, 1996 (date of inception) to December 31, 1996 and for the
years ended December 31, 1997 and 1998, respectively.
 
8. RETIREMENT PLAN
 
    The Company has a 401(k) plan that covers its eligible domestic employees.
The plan does not require a matching contribution by the Company.
 
9. SIGNIFICANT CUSTOMERS AND GEOGRAPHICAL CONCENTRATION
 
    For the year ended December 31, 1997, three customers accounted for
approximately 38%, 23%, and 18% of the Company's total revenue, respectively.
 
    For the year ended December 31, 1998, two customers accounted for
approximately 23% and 16% of the Company's total revenue, respectively.
 
10. SUBSEQUENT EVENTS
 
    In March 1999 the Company entered into two separate agreements to purchase
all the outstanding equity interests of two entities. These acquisitions are
subject to the completion of due diligence and the satisfaction of certain other
conditions. The aggregate estimated purchase price and future compensation to be
paid is approximately $13,000,000. The acquisitions will be accounted for as
purchases.
 
                                      F-16

                                  UNDERWRITING
 
    StarMedia and the underwriters for the offering (the "Underwriters") named
below have entered into an underwriting agreement with respect to the shares
being offered. Subject to certain conditions, each Underwriter has severally
agreed to purchase the number of shares indicated in the following table.
Goldman, Sachs & Co., BancBoston Robertson Stephens Inc., J.P. Morgan Securities
Inc. and Salomon Smith Barney Inc. are the representatives of the Underwriters.
 


                                                                                                        Number of
                                          Underwriters                                                   Shares
- -----------------------------------------------------------------------------------------------------  -----------
                                                                                                    
Goldman, Sachs & Co..................................................................................
BancBoston Robertson Stephens Inc....................................................................
J.P. Morgan Securities Inc...........................................................................
Salomon Smith Barney Inc.............................................................................
                                                                                                       -----------
      Total..........................................................................................
                                                                                                       -----------
                                                                                                       -----------

 
                            ------------------------
 
    If the Underwriters sell more shares than the total number set forth in the
table above, the Underwriters have an option to buy up to an additional
shares from StarMedia to cover such sales. They may exercise that option for 30
days. If any shares are purchased pursuant to this option, the Underwriters will
severally purchase shares in approximately the same proportion as set forth in
the table above.
 
    The following tables show the per share and total underwriting discounts and
commissions to be paid to the Underwriters by StarMedia. Such amounts are shown
assuming both no exercise and full exercise of the Underwriters' option to
purchase additional shares.
 


                     Paid by StarMedia
                     ------------------
                        No Exercise      Full Exercise
                     ------------------  -------------
                                   
Per Share..........      $                $
Total..............      $                $

 
    Shares sold by the Underwriters to the public will initially be offered at
the initial public offering price set forth on the cover of this prospectus. Any
shares sold by the Underwriters to securities dealers may be sold at a discount
of up to $      per share from the initial public offering price. Any such
securities dealers may resell any shares purchased from the Underwriters to
certain other brokers or dealers at a discount of up to $      per share from
the initial public offering price. If all the shares are not sold at the initial
offering price, the representatives may change the offering price and the other
selling terms.
 
    StarMedia and its directors, officers and stockholders have agreed with the
Underwriters not to dispose of or hedge any of their common stock or securities
convertible into or exchangeable for shares of common stock during the period
from the date of this prospectus continuing through the date 180 days after the
date of this prospectus, except with the prior written consent of the
representatives. This agreement does not apply to any existing employee benefit
plans. Please see "Shares Eligible for Future Sale" for a discussion of certain
transfer restrictions.
 
    At the request of StarMedia, the Underwriters have reserved for sale, at the
initial public offering price,      shares of common stock for certain
directors, employees and associates of StarMedia. There can be no assurance that
any of the reserved shares will be so purchased. The number of shares available
for sale to the general public in the offering will be reduced by the number of
reserved shares sold. Any reserved shares not so purchased will be offered to
the general
 
                                      U-1

public on the same basis as the other shares offered hereby.
 
    Prior to this offering, there has been no public market for the shares. The
initial public offering price will be negotiated among StarMedia and the
representatives. Among the factors to be considered in determining the initial
public offering price of the shares, in addition to prevailing market
conditions, will be StarMedia's historical performance, estimates of the
business potential and earnings prospects of StarMedia, an assessment of
StarMedia's management and the consideration of the above factors in relation to
market valuation of companies in related businesses.
 
    StarMedia has applied to list the common stock on the Nasdaq National Market
under the symbol "STRM".
 
    In connection with this offering, the Underwriters may purchase and sell
shares of common stock in the open market. These transactions may include short
sales, stabilizing transactions and purchases to cover positions created by
short sales. Short sales involve the sale by the Underwriters of a greater
number of shares than they are required to purchase in this offering.
Stabilizing transactions consist of certain bids or purchases made for the
purpose of preventing or retarding a decline in the market price of the common
stock while this offering is in progress.
 
    The Underwriters also may impose a penalty bid. This occurs when a
particular Underwriter repays to the Underwriters a portion of the underwriting
discount received by it because the representatives have repurchased shares sold
by or for the account of such Underwriter in stabilizing or short covering
transactions.
 
    These activities by the Underwriters may stabilize, maintain or otherwise
affect the market price of the common stock. As a result, the price of the
common stock may be higher than the price that otherwise might exist in the open
market. If these activities are commenced, they may be discontinued by the
Underwriters at any time. These transactions may be effected on the Nasdaq
National Market, in the over-the-counter market or otherwise.
 
    The Underwriters do not expect sales to discretionary accounts to exceed
five percent of the total number of shares offered.
 
    StarMedia estimates that its share of the total expenses of this offering,
excluding underwriting discounts and commissions, will be approximately $      .
 
    J.P. Morgan Securities Inc., an affiliate of J.P. Morgan & Co., acted as a
placement agent for StarMedia in connection with the private placement of
StarMedia's series C redeemable convertible preferred stock in August 1998.
StarMedia incurred customary placement fees to J.P. Morgan Securities Inc. for
such services.
 
    Bayview Investors, an affiliate of BancBoston Robertson Stephens Inc.,
purchased 200,000 shares of StarMedia's series B redeemable convertible
preferred stock in connection with StarMedia's private placement in February
1998 and 20,834 shares of StarMedia's series C redeemable convertible preferred
stock in connection with StarMedia's private placement in August 1998.
 
    StarMedia has agreed to indemnify the several Underwriters against certain
liabilities, including liabilities under the Securities Act of 1933.
 
                                      U-2

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
    No dealer, salesperson or other person is authorized to give any information
or to represent anything not contained in this prospectus. You must not rely on
any unauthorized information or representations. This prospectus is an offer to
sell only the shares offered hereby, but only under circumstances and in
jurisdictions where it is lawful to do so. The information contained in this
prospectus is current only as of its date.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 


                                          Page
                                          -----
                                    
Prospectus Summary...................           3
Risk Factors.........................           6
Use of Proceeds......................          20
Dividend Policy......................          20
Capitalization.......................          21
Dilution.............................          22
Selected Consolidated Financial
  Data...............................          23
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations......................          24
Business.............................          32
Management...........................          45
Certain Transactions.................          52
Principal Stockholders...............          53
Description of Capital Stock.........          55
Shares Eligible for Future Sale......          58
Validity of Common Stock.............          59
Experts..............................          59
Available Information................          59
Index to Financial Statements........         F-1
Underwriting.........................         U-1

 
                            ------------------------
 
    Through and including             , 1999 (the 25th day after the date of
this prospectus), all dealers effecting transactions in these securities,
whether or not participating in this offering, may be required to deliver a
prospectus. This is in addition to a dealer's obligation to deliver a prospectus
when acting as underwriter and with respect to an unsold allotment or
subscription.
 
                                        Shares
 
                            STARMEDIA NETWORK, INC.
 
                                  Common Stock
 
                                ---------------
 
                                     [LOGO]
 
                                  ------------
 
                              GOLDMAN, SACHS & CO.
 
                                   BANCBOSTON
                               ROBERTSON STEPHENS
 
                               J.P. MORGAN & CO.
 
                              SALOMON SMITH BARNEY
 
                      Representatives of the Underwriters
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                PART II: INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION
 
    The following table sets forth an estimate of the costs and expenses, other
than the underwriting discounts and commissions, payable by the Registrant in
connection with the issuance and distribution of the common stock being
registered.
 

                                                                
SEC registration fee.............................................  $  20,850
NASD filing fee..................................................      8,000
NASDAQ listing fee...............................................      *
Legal fees and expenses..........................................      *
Accountants' fees and expenses...................................      *
Printing expenses................................................    250,000
Blue sky fees and expenses.......................................      5,000
Transfer Agent and Registrar fees and expenses...................     15,000
Miscellaneous....................................................      *
                                                                   ---------
      Total......................................................  $   *
                                                                   ---------
                                                                   ---------

 
- ------------------------
 
*   To be completed by amendment.
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS
 
    Section 145 of the DGCL makes provision for the indemnification of officers
and directors in terms sufficiently broad to indemnify officers and directors
under certain circumstances from liabilities (including reimbursement for
expenses incurred) arising under the Securities Act. Section 145 of the DGCL
empowers a corporation to indemnify its directors and officers and to purchase
insurance with respect to liability arising out of their capacity or status as
directors and officers, provided that this provision shall not eliminate or
limit the liability of a director: (i) for any breach of the director's duty of
loyalty to the corporation or its stockholders, (ii) for acts or omissions not
in good faith or which involve intentional misconduct or a knowing violation of
law, (iii) arising under Section 174 of the DGCL, or (iv) for any transaction
from which the director derived an improper personal benefit. The DGCL provides
further that the indemnification permitted thereunder shall not be deemed
exclusive of any other rights to which the directors and officers may be
entitled under the corporation's bylaws, any agreement, a vote of stockholders
or otherwise.
 
    The certificate of incorporation of StarMedia provides for indemnification
of our directors against, and absolution of, liability to StarMedia and its
stockholders to the fullest extent permitted by the DGCL. StarMedia intends to
purchase directors' and officers' liability insurance covering certain
liabilities that may be incurred by our directors and officers in connection
with the performance of their duties.
 
    The employment agreements we have with Fernando J. Espuelas and Jack C. Chen
provide that such executives will be indemnified by us for all liabilities
relating to their status as officers or directors of StarMedia, and any actions
committed or omitted by the executives, to the maximum extent permitted by law
of the State of Delaware.
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES
 
    The Registrant has sold and issued the following securities since March 5,
1996 (inception):
 
       1. From March 5, 1996 to December 31, 1998, the Registrant issued and
       sold 10,392,000 shares of common stock at prices ranging from $0.0056 to
       $0.50 per share.
 
                                      II-1

       2. In 1997, the Registrant issued and sold 7,330,000 shares of series A
       redeemable convertible preferred stock for an aggregate purchase price of
       $3,665,000.
 
       3. On January 21, 1998, the Registrant issued 8% convertible subordinated
       notes due July 21, 1998 to the fl@tiron Fund, LLC in the aggregate
       principal amount of $410,000 and to Chase Venture Capital Associates,
       L.P. in the aggregate amount of $3,590,000.
 
       4. In February 1998, the Registrant issued and sold 8,000,000 shares of
       series B redeemable convertible preferred stock for an aggregate purchase
       price of $12,000,000.
 
       5. On August 14, 1998, the Registrant issued 8% convertible subordinated
       notes due December 31, 1998 to the Flatiron Fund 1998/99, LLC in the
       aggregate principal amount of $200,000 and to Chase Venture Capital
       Associates, L.P. in the aggregate amount of $1,800,000.
 
       6. In August 1998, the Registrant issued and sold 16,666,667 shares of
       series C redeemable convertible preferred stock for an aggregate purchase
       price of $80,000,000.
 
       7. Since December 31, 1998, the Registrant issued 35,000 shares of common
       stock upon the exercise of options at exercise prices ranging from $0.50
       to $1.50 per share.
 
    The sales of the above securities were deemed to be exempt from registration
under the Securities Act in reliance on Section 4(2) of the Securities Act. The
recipients of securities in each of these transactions represented their
intention to acquire the securities for investment only and not with view to or
for sale in connection with any distribution thereof and appropriate legends
were affixed to the share certificates and instruments issued in such
transactions. All recipients had adequate access, through their relationship
with the Registrant, to information about the Registrant.
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
 


 EXHIBIT
 NUMBER                                                  DESCRIPTION
- ---------  -------------------------------------------------------------------------------------------------------
        
    1.1    Form of underwriting agreement.
    3.1    Certificate of incorporation, as amended.
    3.2*   Form of amended and restated certificate of incorporation to be in effect upon the closing of this
           offering.
    3.3    By-laws.
    3.4*   Form of amended and restated bylaws to be in effect upon the closing of this offering.
    4.1*   Specimen common stock certificate.
    4.2    Please see Exhibits 3.1, 3.2, 3.3 and 3.4 for provisions of the certificate of incorporation and bylaws
           defining the rights of holders of common stock.
    5.1*   Opinion of Brobeck, Phleger & Harrison LLP.
   10.1    1997 stock option plan.
   10.2    1998 stock plan.
   10.3    Lease dated September 15, 1997 between Clemons Management Corp. and StarMedia, as amended.
   10.4    Amended and restated registration rights agreement.
   10.5    Amendment no. 1 to amended and restated registration rights agreement.
   10.6    Series A convertible stock purchase agreement, dated as of July 25, 1997, between StarMedia and several
           purchasers named in attached schedule.
   10.7    Series B convertible stock purchase agreement, dated as of February 20, 1998, between StarMedia and
           several purchasers named in attached schedule.
   10.8    Series C convertible stock purchase agreement, dated as of August 24, 1998, between StarMedia and
           several purchasers named in attached schedule.

 
                                      II-2



 EXHIBIT
 NUMBER                                                  DESCRIPTION
- ---------  -------------------------------------------------------------------------------------------------------
        
   21.1    List of subsidiaries.
   23.1    Consent of Ernst & Young LLP.
   23.2*   Consent of Brobeck, Phleger & Harrison LLP (included in Exhibit 5.1).
   24.1    Power of attorney (please see Signature Page).
   27.1    Financial Data Schedule.

 
- ------------------------
 
*   To be filed by amendment.
 
(b) Financial Statement Schedules
 
    Schedule II--Valuation and Qualifying Accounts
 
    Schedules not listed above have been omitted because the information
required to be set forth therein is not applicable or is shown in the financial
statements or notes thereto.
 
ITEM 17. UNDERTAKINGS.
 
    The undersigned Registrant hereby undertakes to provide to the Underwriters
at the closing specified in the Underwriting Agreement certificates in such
denominations and registered in such names as required by the Underwriters to
permit prompt delivery to each purchaser.
 
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 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 purpose 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.
 
    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 Act 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 Act and will be governed by the final adjudication of
such issue.
 
                                      II-3

                                   SIGNATURES
 
    Pursuant to the requirements of the Securities Act of 1933, the registrant
has duly caused this registration statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the City of New York, State of New
York, on this 18th day of March, 1999.
 
                                STARMEDIA NETWORK, INC.
 
                                BY:  /S/ FERNANDO J. ESPUELAS
                                     -----------------------------------------
                                     Fernando J. Espuelas
                                     CHIEF EXECUTIVE OFFICER
 
                               POWER OF ATTORNEY
 
    We, the undersigned directors and/or officers of StarMedia Network, Inc.
(the "Company"), hereby severally constitute and appoint Fernando J. Espuelas,
chief executive officer, and Jack C. Chen, president, and each of them
individually, with full powers of substitution and resubstitution, our true and
lawful attorneys, with full powers to them and each of them to sign for us, in
our names and in the capacities indicated below, the registration statement on
Form S-1 filed with the Securities and Exchange Commission, and any and all
amendments to said registration statement (including post-effective amendments),
and any registration statement filed pursuant to Rule 462(b) under the
Securities Act of 1933, as amended, in connection with the registration under
the Securities Act of 1933, as amended, of equity securities of the Company, and
to file or cause to be filed the same, with all exhibits thereto and other
documents in connection therewith, with the Securities and Exchange Commission,
granting unto said attorneys, 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 each of them might
or could do in person, and hereby ratifying and confirming all that said
attorneys, and each of them, or their substitute or substitutes, shall do or
cause to be done by virtue of this Power of Attorney.
 
    Pursuant to the requirements of the Securities Act of 1933, this
registration statement has been signed by the following persons in the
capacities indicated below:
 

                                            
Dated: March 18, 1999                          /s/ FERNANDO J. ESPUELAS
                                               --------------------------------------------
                                               Fernando J. Espuelas
                                               Chief Executive Officer and
                                               Chairman of the Board of Directors
                                               (Principal Executive Officer)
 
Dated: March 18, 1999                          /s/ JACK C. CHEN
                                               --------------------------------------------
                                               Jack C. Chen
                                               President and Director
 
Dated: March 18, 1999                          /s/ STEVEN J. HELLER
                                               --------------------------------------------
                                               Steven J. Heller
                                               Vice President, Finance and Administration
                                               (Principal Financial and Accounting Officer)

 
                                      II-4


                                            
Dated: March 18, 1999                          /s/ DOUGLAS M. KARP
                                               --------------------------------------------
                                               Douglas M. Karp
                                               Director
 
Dated: March 18, 1999                          /s/ CHRISTOPHER T. LINEN
                                               --------------------------------------------
                                               Christopher T. Linen
                                               Director
 
Dated: March 18, 1999                          /s/ GERARDO M. ROSENKRANZ
                                               --------------------------------------------
                                               Gerardo M. Rosenkranz
                                               Director
 
Dated: March 18, 1999                          /s/ SUSAN L. SEGAL
                                               --------------------------------------------
                                               Susan L. Segal
                                               Director
 
Dated: March 18, 1999                          /s/ FREDERICK R. WILSON
                                               --------------------------------------------
                                               Frederick R. Wilson
                                               Director

 
                                      II-5

                         REPORT OF INDEPENDENT AUDITORS
 
Board of Directors and Stockholders
StarMedia Network, Inc.
 
We have audited the consolidated financial statements of StarMedia Network, Inc.
as of December 31, 1997 and 1998, and the period from March 5, 1996 (date of
inception) to December 31, 1996 and the years ended December 31, 1997 and 1998,
and have issued our report thereon dated March 5, 1999 (included elsewhere in
this Registration Statement). Our audits also included the financial statement
schedule listed in Item 16(b) of this Registration Statement. This schedule is
the responsibility of the Company's management. Our responsibility is to express
an opinion based on our audits.
 
In our opinion, the financial statement schedule referred to above, when
considered in relation to the basic financial statements taken as a whole,
presents fairly in all material respects the information set forth therein.
 
                                                           ERNST & YOUNG LLP
 
/s/ Ernst & Young LLP
 
New York, New York
March 5, 1999
 
                                      S-1

                 SCHEDULE II--VALUATION AND QUALIFYING ACCOUNTS
                             STARMEDIA NETWORK INC.


                COLUMN A                        COLUMN B                        COLUMN C                      COLUMN D
                                                                               ADDITIONS
                                               BALANCE AT       CHARGED TO COSTS     CHARGED TO OTHER
               DESCRIPTION                 BEGINNING OF PERIOD    AND EXPENSES           ACCOUNTS            DEDUCTIONS
                                                                                              
YEAR ENDED DECEMBER 31, 1998
  Reserves and allowances deducted from
    asset accounts:
    Allowance for doubtful accounts......              --           $  60,000                   --                   --
 
YEAR ENDED DECEMBER 31, 1997
  Reserves and allowances deducted from
    asset accounts:
    Allowance for doubtful accounts......              --                  --                   --                   --
 
PERIOD ENDED MARCH 5, 1996 (DATE OF
  INCEPTION) TO DECEMBER 31, 1996
  Reserves and allowances deducted from
    asset accounts:
    Allowance for doubtful accounts......              --                  --                   --                   --
 

                COLUMN A                      COLUMN E
 
                                           BALANCE AT END
               DESCRIPTION                    OF PERIOD
                                        
YEAR ENDED DECEMBER 31, 1998
  Reserves and allowances deducted from
    asset accounts:
    Allowance for doubtful accounts......     $  60,000
YEAR ENDED DECEMBER 31, 1997
  Reserves and allowances deducted from
    asset accounts:
    Allowance for doubtful accounts......            --
PERIOD ENDED MARCH 5, 1996 (DATE OF
  INCEPTION) TO DECEMBER 31, 1996
  Reserves and allowances deducted from
    asset accounts:
    Allowance for doubtful accounts......            --

 
                                      S-2

                                 EXHIBIT INDEX
 


 EXHIBIT
 NUMBER                                                  DESCRIPTION
- ---------  -------------------------------------------------------------------------------------------------------
        
    1.1    Form of underwriting agreement.
    3.1    Certificate of incorporation, as amended.
    3.2*   Form of amended and restated certificate of incorporation to be in effect upon the closing of this
           offering.
    3.3    By-laws.
    3.4*   Form of amended and restated bylaws to be in effect upon the closing of this offering.
    4.1*   Specimen common stock certificate.
    4.2    Please see Exhibits 3.1, 3.2, 3.3 and 3.4 for provisions of the certificate of incorporation and bylaws
           defining the rights of holders of common stock.
    5.1*   Opinion of Brobeck, Phleger & Harrison LLP.
   10.1    1997 stock option plan.
   10.2    1998 stock plan.
   10.3    Lease dated September 15, 1997 between Clemons Management Corp. and StarMedia, as amended.
   10.4    Amended and restated registration rights agreement.
   10.5    Amendment no. 1 to amended and restated registration rights agreement.
   10.6    Series A convertible stock purchase agreement, dated as of July 25, 1997, between StarMedia and several
           purchasers named in attached schedule.
   10.7    Series B convertible stock purchase agreement, dated as of February 20, 1998, between StarMedia and
           several purchasers named in attached schedule.
   10.8    Series C convertible stock purchase agreement, dated as of August 24, 1998, between StarMedia and
           several purchasers named in attached schedule.
   21.1    List of subsidiaries.
   23.1    Consent of Ernst & Young LLP.
   23.2*   Consent of Brobeck, Phleger & Harrison LLP (included in Exhibit 5.1).
   24.1    Power of attorney (please see Signature Page).
   27.1    Financial Data Schedule.

 
- ------------------------
 
*   To be filed by amendment.