AETHER SYSTEMS INC
424B3, 2000-11-13
COMPUTER INTEGRATED SYSTEMS DESIGN
Previous: GALTECH SEMICONDUCTOR MATERIALS CO, 10QSB, EX-27, 2000-11-13
Next: AMERICAN ENTERPRISE MVA ACCOUNT, 424B3, 2000-11-13



<PAGE>   1

                                                Filed pursuant to Rule 424(b)(3)
                                                      Registration No. 333-48898
                       PROSPECTUS DATED NOVEMBER 13, 2000

PROSPECTUS
----------

                                1,143,949 SHARES

                                 [AETHER LOGO]

                                  COMMON STOCK

                             ----------------------

        This prospectus relates to 1,143,949 shares of common stock, $.01 par
value per share, of Aether Systems, Inc., which may be offered from time to time
by the selling stockholders named herein or their pledgees, donees, transferees
or other successors in interest in transactions on the Nasdaq National Market,
in negotiated transactions or otherwise, at fixed prices prevailing at the time
of sale, at negotiated prices, or without consideration, or by any other legally
available means. We are registering the sale of the common stock pursuant to the
terms of a registration rights agreement with the selling stockholders. The
registration of the common stock does not necessarily mean that any of the
shares will be offered or sold by the selling stockholders.

        The selling stockholders or their pledgees, donees, transferees or other
successors in interest will receive all of the net proceeds from the sale of the
common stock and will pay all underwriting discounts and selling commissions, if
any, applicable to any such sale. We will not receive any of the proceeds from
the sale of the shares by the selling stockholders. We are paying the costs of
preparing and filing the registration statement of which this prospectus is a
part.

        The shares are quoted on the Nasdaq National Market under the symbol
"AETH." On October 26, 2000, the last sale price of the shares as reported on
the Nasdaq National Market was $94.125 per share.

        The common stock may be sold by selling stockholders or their pledgees,
donees, transferees or other successors in interest from time to time directly
to purchasers or through agents, underwriters and dealers. See "Plan of
Distribution" and "Selling Stockholders." The selling stockholders and any
dealers, agents or underwriters who participate in the distribution of the
common stock may be deemed to be "underwriters" within the meaning of the
Securities Act of 1933 and any commission received by them and any profit on the
resale of the common stock purchased by them may be deemed to be underwriting
commissions or discounts under the Securities Act. See "Plan of Distribution"
for a description of indemnification arrangements.

        INVESTING IN THE COMMON STOCK INVOLVES RISKS THAT ARE DESCRIBED IN THE
"RISK FACTORS" SECTION BEGINNING ON PAGE 5 OF THIS PROSPECTUS.

                             ----------------------

        Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.

                             ----------------------

               The date of this prospectus is November 13, 2000.
<PAGE>   2

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                PAGE
                                                                ----
<S>                                                           <C>
About Aether Systems........................................      4
Risk Factors................................................      5
Forward-Looking Statements..................................     15
Use of Proceeds.............................................     15
Dilution....................................................     15
Selling Stockholders........................................     16
Plan of Distribution........................................     21
Legal Matters...............................................     22
Experts.....................................................     22
Where You Can Find More Information.........................     22
</TABLE>

                                        3
<PAGE>   3

                              ABOUT AETHER SYSTEMS

     Aether provides wireless data services, systems and software enabling
people to use handheld devices for mobile data communications and real-time
transactions. We design, develop, sell and support complete wireless systems for
corporations seeking to make data available to mobile workers or consumers. Our
full mobile and wireless solution, including our wireless data engineering and
development expertise, our wireless integration software and mobile data
management software products, our customer service center and our network
operations centers, positions us to take advantage of the growing demand for
wireless data services.

     We seek to develop and deliver wireless data services across a variety of
industries and market segments in the United States and internationally. Our
strategy initially focused on developing services for the financial services
sector, whose participants we believe were among the earliest adopters of
wireless data services. We currently offer and are developing wireless trading
and financial services for several major financial institutions. We also
currently offer and are developing financial news and information services
through major content providers. We have moved and continue to move into other
industries and market segments, including software products, logistics, field
sales, healthcare, wireless commerce, mobile government and messaging.

     Our strategy.  Our strategy is to be the dominant provider in the United
States and internationally of wireless data services and systems to corporations
by using our engineering expertise, our software platforms, our customer service
center, our network operations centers and our other resources. We believe our
capabilities and experience have established us as an early market leader in
wireless data services, and a key element of our strategy is to move quickly
into new opportunities to extend our leadership position. Our strategy also
includes the following other key elements:

     - target a variety of industries and market segments for development of
       wireless data communications and services in the United States and
       internationally;

     - offer a wide range of software products to address every aspect of
       wireless integration and mobile data management for mobile workers and
       consumers;

     - expand our customer base and strengthen the Aether brand through enhanced
       sales and marketing efforts;

     - maintain and strengthen our strategic relationships with suppliers and
       network carriers;

     - seek to maximize our recurring revenue; and

     - apply the expertise we gain through engineering services and research and
       development activities to emerging business opportunities.

     Other information.  We are a Delaware corporation. In October 1999, we
completed our initial public offering of 6,900,000 shares of our common stock at
an initial offering price of $16.00 per share, which resulted in net proceeds of
approximately $101.1 million. In March 2000, we completed the offering of an
additional 5,411,949 shares of our common stock at a price of $205.00 per share
and issued $310.5 million of 6% convertible subordinated notes due 2005, which
together resulted in net proceeds of approximately $1.4 billion. All references
to "we," "us," "our" or "Aether" in this prospectus mean Aether Systems, Inc.
and its subsidiaries or predecessors.

     Our principal executive offices are located at 11460 Cronridge Drive,
Owings Mills, Maryland 21117, and our telephone number is (410) 654-6400. We
maintain a Web site at www.aethersystems.com. Information contained in our Web
site does not constitute a part of this prospectus.

                                        4
<PAGE>   4

                                  RISK FACTORS

     Investing in our common stock involves risks.  You should carefully
consider the following risks together with the other information contained in
this prospectus and all the information incorporated by reference before
deciding to buy our common stock.

WE HAVE HISTORICALLY INCURRED LOSSES AND THESE LOSSES MAY INCREASE IN THE
FUTURE.

     We reported net losses of $2.7 million, $4.7 million, $30.7 million and
$123.2 million for the years ended December 31, 1997, 1998 and 1999 and for the
six months ended June 30, 2000, respectively. Information regarding our
operating results for subsequent periods is or will be included in our periodic
reports incorporated herein by reference. Our amortization of intangible assets
and option and warrant expense has grown significantly as a result of recent
acquisitions. In addition, we expect to continue to incur significant sales and
marketing, systems development and administrative expenses. Therefore, we will
need to generate significant revenue to become profitable and sustain
profitability on a quarterly or annual basis. We expect to continue to incur
significant losses for the foreseeable future. As a result, we may not be able
to achieve profitability on a quarterly or annual basis.

OUR FUTURE RESULTS ARE UNCERTAIN BECAUSE OUR HISTORICAL REVENUE WAS DERIVED FROM
SERVICES OTHER THAN THOSE WE EXPECT TO BE THE FOCUS OF OUR BUSINESS IN THE
FUTURE.

     We only have a limited history selling our current services on which you
can evaluate our business, financial condition and operating results. Although
we commenced operations in January 1996, until March 1997 all of our revenue
came from engineering services and not from monthly service subscriptions or
software licensing which we now provide and which will be our focus in the
future. We have not had any AIM license sales other than sales to Inciscent,
Inc. and Data Critical Corporation totaling $1.25 million, for which the revenue
will be recognized over the terms of the agreements. In addition, our monthly
service subscriptions have come primarily from subscriptions to our financial
data and online trading services, and our strategy includes development of
services in other industries. Because of this change in focus and our recent
acquisitions, you should not rely on our past performance to evaluate our future
performance.

THERE IS NO ESTABLISHED MARKET FOR OUR SERVICES AND WE MAY NOT BE ABLE TO SELL
ENOUGH OF OUR SERVICES TO BECOME PROFITABLE.

     The markets for wireless data and transaction services are still emerging
and continued growth in demand for and acceptance of these services remains
uncertain. Current barriers to market acceptance of these services include cost,
reliability, functionality and ease of use. We cannot be certain that these
barriers will be overcome. We are currently developing services for some of our
business customers pursuant to preliminary agreements with these parties and
expect to develop services for other entities as well. We cannot assure you that
these parties will enter into contracts for our services or that products
developed for our other customers will result in revenue. Our competitors may
develop alternative wireless data communications systems that gain broader
market acceptance than our systems. If the market for our services does not
grow, or grows more slowly than we currently anticipate, we may not be able to
attract customers for our services and our revenues would be adversely affected.

OUR RECENT ACQUISITIONS, INVESTMENTS AND STRATEGIC ALLIANCES MAY NOT DELIVER THE
VALUE WE PAID OR WILL PAY FOR THEM AND MAY RESULT IN EXCESSIVE EXPENSES IF WE DO
NOT SUCCESSFULLY INTEGRATE THEM, OR IF THE COSTS AND MANAGEMENT RESOURCES WE
EXPEND IN CONNECTION WITH THE INTEGRATIONS EXCEED OUR EXPECTATIONS.

     We expect that our recent acquisitions, investments and strategic alliances
and any acquisitions, investments or strategic alliances we may pursue in the
future will have a continuing, significant impact on

                                        5
<PAGE>   5

our business, financial condition and operating results. The value of the
companies that we acquire or invest in may be less than the amount we paid if
there is:

     - a decline of their position in the respective markets they serve; or

     - a decline in general of the markets they serve.

     Our financial results may be adversely affected if:

     - we fail to assimilate the acquired assets with our pre-existing business;

     - we lose key employees of these companies or of Aether as a result of the
       acquisitions;

     - our management's attention is diverted by other business concerns; or

     - we assume unanticipated liabilities related to the acquired assets.

     In addition, the companies we have acquired or invested in or may acquire
or invest in are subject to each of the business risks we describe in this
section, and if they incur any of these risks the businesses may not be as
valuable as the amount we paid. Further, we cannot guarantee that we will
realize the benefits or strategic objectives we are seeking to obtain by
acquiring or investing in these companies. In addition, we cannot assure you
that our various pending acquisitions, investments and strategic alliances will
be completed on the terms we describe, or at all.

WE MAY NOT ACHIEVE PROFITABILITY IF WE ARE UNABLE TO MAINTAIN, IMPROVE AND
DEVELOP THE WIRELESS DATA SERVICES WE OFFER.

     We believe that our future business prospects depend in part on our ability
to maintain and improve our current services and to develop new ones on a timely
basis. Our services will have to achieve market acceptance, maintain
technological competitiveness and meet an expanding range of customer
requirements. As a result of the complexities inherent in our service offerings,
major new wireless data services and service enhancements require long
development and testing periods. We may experience difficulties that could delay
or prevent the successful development, introduction or marketing of new services
and service enhancements. Additionally, our new services and service
enhancements may not achieve market acceptance. If we cannot effectively develop
and improve services we may not be able to recover our fixed costs or otherwise
become profitable.

IF WE DO NOT RESPOND EFFECTIVELY AND ON A TIMELY BASIS TO RAPID TECHNOLOGICAL
CHANGE, OUR SERVICES MAY BECOME OBSOLETE AND WE MAY LOSE SALES.

     The wireless and data communications industries are characterized by
rapidly changing technologies, industry standards, customer needs and
competition, as well as by frequent new product and service introductions. Our
services are integrated with wireless handheld devices and the computer systems
of our corporate customers. Our services must also be compatible with the data
networks of wireless carriers. We must respond to technological changes
affecting both our customers and suppliers. We may not be successful in
developing and marketing, on a timely and cost-effective basis, new services
that respond to technological changes, evolving industry standards or changing
customer requirements. Our ability to grow and achieve profitability will
depend, in part, on our ability to accomplish all of the following in a timely
and cost-effective manner:

     - effectively use and integrate new wireless and data technologies;

     - continue to develop our technical expertise;

     - enhance our wireless data, engineering and system design services;

     - develop applications for new wireless networks; and

     - influence and respond to emerging industry standards and other changes.

                                        6
<PAGE>   6

WE DEPEND UPON WIRELESS NETWORKS OWNED AND CONTROLLED BY OTHERS. IF WE DO NOT
HAVE CONTINUED ACCESS TO SUFFICIENT CAPACITY ON RELIABLE NETWORKS, WE MAY BE
UNABLE TO DELIVER SERVICES AND OUR SALES COULD DECREASE.

     Our ability to grow and achieve profitability partly depends on our ability
to buy sufficient capacity on the networks of wireless carriers such as Verizon
Wireless and AT&T Wireless Services and on the reliability and security of their
systems. All of our services are delivered using airtime purchased from third
parties. We depend on these companies to provide uninterrupted and "bug free"
service and would not be able to satisfy our customers' needs if they failed to
provide the required capacity or needed level of service. In addition, our
expenses would increase and our profitability could be materially adversely
affected if wireless carriers were to increase the prices of their services. Our
existing agreements with the wireless carriers generally have one-year terms.
Some of these wireless carriers are, or could become, our competitors and if
they compete with us they may refuse to provide us with their services.

OUR FAILURE TO DEVELOP RECOGNITION FOR THE AETHER BRAND COULD PREVENT US FROM
ACHIEVING A PROFITABLE LEVEL OF SALES.

     Our sales and marketing activities to date have been limited. Our expenses
related to these activities were $840,000 and $2.1 million for the years ended
December 31, 1998 and 1999, respectively, and $21.8 million for the six months
ended June 30, 2000. We intend to increase the market presence of our brand over
time, which will require us to continue our increased spending on sales and
marketing. We have applied for, but have not received, federal trademark
registrations for the names "Aether," "Aether Systems" and "AIM," among others,
and we may not be able to use these names effectively or at all if we fail to
obtain such registrations due to conflicting marks or otherwise. As a result of
our recent acquisitions, we expect to market our acquired products and services
under their existing brands. We may lose existing customers or fail to attract
new customers if these brands are not well received by our customers, if our
marketing efforts are not productive, if we are otherwise unsuccessful in
increasing our brand awareness or if our competition has greater brand
recognition.

WE DEPEND ON THIRD PARTIES FOR THE MARKETING AND SALES OF SOME OF OUR SERVICES.
IF THE MARKETING EFFORTS OF THESE THIRD PARTIES ARE NOT EFFECTIVE, WE MAY NOT
ACHIEVE A PROFITABLE LEVEL OF SALES.

     We rely substantially on the efforts of others to market and sell some of
our wireless data communications services, in particular the online trading
services we have developed for Charles Schwab and Morgan Stanley Dean Witter
Online and are developing for Merrill Lynch, National Discount Brokers, Bear
Stearns and other financial institutions. We also expect to rely on the
marketing efforts of our strategic relationship partners for products under
development in our other market segments such as healthcare and wireless
commerce. We cannot control whether or how these third parties who sell and
market our services will perform their obligations to market our services. If
these third parties fail to market our services or their efforts fail to result
in new customers, we may be unable to attract new customers and our revenue
could be adversely affected.

WE MAY FAIL TO SUPPORT OUR ANTICIPATED GROWTH IN OPERATIONS, WHICH COULD REDUCE
DEMAND FOR OUR SERVICES AND MATERIALLY ADVERSELY AFFECT OUR REVENUE.

     Our business strategy is based on the assumption that the number of
subscribers to our services, the amount of information they want to receive and
the number of services we offer will all increase. We must continue to develop
and expand our systems and operations to accommodate this growth. The expansion
and adaptation of our customer service and network operations centers require
substantial financial, operational and management resources. We may be unable to
expand our operations for one or more of the following reasons:

     - we may not be able to locate or hire at reasonable compensation rates
       qualified engineers and other employees necessary to expand our capacity;

     - we may not be able to obtain the hardware necessary to expand our
       capacity;

                                        7
<PAGE>   7

     - we may not be able to expand our billing and other related support
       systems; and

     - we may not be able to obtain sufficient additional capacity from wireless
       carriers.

     Due to the limited deployment of our services to date, the ability of our
systems and operations to connect and manage a substantially larger number of
customers while maintaining superior performance is unknown. Any failure on our
part to develop and maintain our wireless data services as we experience rapid
growth could significantly reduce demand for our services and materially
adversely affect our revenue.

WE DEPEND ON RECRUITING AND RETAINING KEY MANAGEMENT AND TECHNICAL PERSONNEL
WITH WIRELESS DATA AND SOFTWARE EXPERIENCE AND WE MAY NOT BE ABLE TO DEVELOP NEW
PRODUCTS OR SUPPORT EXISTING PRODUCTS IF WE CANNOT HIRE OR RETAIN QUALIFIED
EMPLOYEES.

     Because of the technical nature of our products and the dynamic market in
which we compete, our performance depends on attracting and retaining key
employees. Competition for qualified personnel in the wireless data and software
industries is intense and finding qualified personnel with experience in both
industries is even more difficult. We believe there are only a limited number of
individuals with the requisite skills in the field of wireless data
communication, and it is becoming increasingly difficult to hire and retain
these persons. Competitors and others have in the past attempted, and may in the
future attempt, to recruit our employees. Each of our engineers has entered into
a non-competition agreement with us for a period of ten months after they leave
Aether. These agreements will not prevent our engineers from leaving or working
for competitors relatively soon after they leave us.

     We currently maintain a key person life insurance policy for David S. Oros,
our chairman and chief executive officer. We do not maintain insurance policies
for any of our other executive officers.

WE MAY NOT HAVE ADEQUATELY PROTECTED OUR INTELLECTUAL PROPERTY RIGHTS, WHICH
COULD ALLOW COMPETITORS TO DEVELOP SIMILAR PRODUCTS USING SIMILAR TECHNOLOGY AND
THUS REDUCE OUR SALES AND REVENUE.

     We have attempted to protect our technology, including the technology we
have obtained or will obtain in our acquisitions, through patent, trademark and
copyright protection, as well as through trade secret laws and non-competition
and non-disclosure agreements with key employees. Patents may infringe on valid
patents held by third parties, or patents held by third parties may limit the
scope of any patents we receive. In particular, the patent we acquired in our
acquisition of Riverbed covers a technology that is similar to other patented
technologies. In addition, we have no international patent protection in this
technology. If we are not adequately protected, other companies with sufficient
engineering expertise could develop competing products based on our intellectual
property and reduce our sales and thus our revenue.

WE MAY BE SUED BY THIRD PARTIES FOR INFRINGEMENT OF THEIR INTELLECTUAL PROPERTY
RIGHTS AND INCUR COSTS OF DEFENSE AND POSSIBLY ROYALTIES OR LOSE THE RIGHT TO
USE TECHNOLOGY IMPORTANT TO PROVIDING OUR SERVICES.

     The telecommunications and software industries are characterized by the
existence of a large number of patents and frequent litigation based on
allegations of patent infringement or other violations of intellectual property
rights. As the number of participants in our market increases, the possibility
of an intellectual property claim against us could increase. We have received
two claims that we have infringed patents developed by other parties. Although
we believe these claims are without merit, these and any other intellectual
property claims, with or without merit, could be time-consuming and expensive to
litigate or settle, could require us to enter into costly royalty arrangements,
could divert management attention from administering our business and could
hinder us from conducting our business.

WE MAY BE SUBJECT TO LIABILITY FOR TRANSMITTING INFORMATION, AND OUR INSURANCE
COVERAGE MAY BE INADEQUATE TO PROTECT US FROM THIS LIABILITY.

     We may be subject to claims relating to information transmitted over
systems we develop or operate. These claims could take the form of lawsuits for
defamation, negligence, copyright or trademark

                                        8
<PAGE>   8

infringement or other actions based on the nature and content of the materials.
Although we carry general liability insurance, our insurance may not cover
potential claims of this type or may not be adequate to cover all costs incurred
in defense of potential claims or to indemnify us for all liability that may be
imposed.

DISRUPTION OF OUR SERVICES DUE TO ACCIDENTAL OR INTENTIONAL SECURITY BREACHES
MAY HARM OUR REPUTATION, POTENTIALLY CAUSING A LOSS OF SALES AND AN INCREASE IN
OUR EXPENSES.

     A significant barrier to the growth of wireless data services or
transactions on the Internet or by other electronic means has been the need for
secure transmission of confidential information. Our systems could be disrupted
by unauthorized access, computer viruses and other accidental or intentional
actions. We may incur significant costs to protect against the threat of
security breaches or to alleviate problems caused by such breaches. If a third
party were able to misappropriate our users' personal or proprietary information
or credit card information, we could be subject to claims, litigation or other
potential liabilities that could materially adversely impact our revenue and may
result in the loss of customers.

ANY TYPE OF SYSTEMS FAILURE COULD REDUCE SALES, INCREASE COSTS OR RESULT IN
CLAIMS OF LIABILITY.

     Our existing wireless data services are dependent on real-time, continuous
feeds from Reuters Selectfeed Plus and others. The ability of our subscribers to
make securities trades, receive sales leads and receive critical business
information requires timely and uninterrupted connections with our wireless
network carriers. Any disruption from our satellite feeds or backup landline
feeds could result in delays in our subscribers' ability to receive information
or execute trades. We cannot assure you that our systems will operate
appropriately if we experience a hardware or software failure or if there is an
earthquake, fire or other natural disaster, a power or telecommunications
failure, intentional disruptions of service by third parties, an act of God or
an act of war. A failure in our systems could cause delays in transmitting data,
and as a result we may lose customers or face litigation that could involve
material costs and distract management from operating our business.

OUR ABILITY TO SELL NEW AND EXISTING SERVICES AT A PROFIT COULD BE IMPAIRED BY
COMPETITORS.

     Intense competition could develop in the market for services we offer. We
developed our software using standard industry development tools. Many of our
agreements with wireless carriers, wireless handheld device manufacturers and
data providers are non-exclusive. Our competitors could develop and use the same
products and services in competition with us. With time and capital, it would be
possible for competitors to replicate our services. Our competitors could
include wireless network carriers such as Verizon Wireless and AT&T Wireless
Services, software developers such as Microsoft Corporation, 724 Solutions Inc.
and Phone.com and systems integrators such as International Business Machines
Corporation. Many of our competitors have significantly greater resources than
we do. Furthermore, competitors may develop a different approach to marketing
the services we provide in which subscribers may not be required to pay for the
information provided by our services. Competition could reduce our market share
or force us to lower prices to unprofitable levels.

WE MAY LOSE THE OPPORTUNITY TO PURSUE DESIRABLE PROJECTS TO INCISCENT, OMNISKY,
SILA AND MINDSURF AND OTHER COMPANIES IN WHICH WE HOLD EQUITY INTERESTS, BECAUSE
SOME OF OUR DIRECTORS AND EXECUTIVE OFFICERS SERVE ON THE BOARDS OF DIRECTORS OF
THESE COMPANIES.

     David S. Oros, our chairman and chief executive officer, and some of our
other directors have been appointed to the boards of directors of companies in
which we hold an equity interest, including OmniSky, Sila and MindSurf. Some of
our executive officers have been appointed to the board of directors of
companies in which we hold an equity interest, including Inciscent and MindSurf.
These other companies may develop products that compete with our own products.
Mr. Oros and the other directors and executive officers may learn of business
opportunities that are appropriate for the boards on which they serve and Mr.
Oros and these other individuals may not be required to make those opportunities
available to us. If OmniSky, Sila, Inciscent, MindSurf or any other joint
ventures we may enter into pursue opportunities
                                        9
<PAGE>   9

that we would have an interest in pursuing, our business may fail to grow or our
existing business may suffer. Mr. Oros and these other directors and executive
officers may also have other conflicts of interest with Aether because of their
positions with OmniSky, Sila, Inciscent and MindSurf and OmniSky's, Sila's,
Inciscent's and MindSurf's contractual relationships with Aether.

AN INTERRUPTION IN THE SUPPLY OF PRODUCTS AND SERVICES THAT WE OBTAIN FROM THIRD
PARTIES COULD CAUSE A DECLINE IN SALES OF OUR SERVICES, AND PRODUCTS WE PURCHASE
TO AVOID SHORTAGES MAY BECOME OBSOLETE BEFORE WE CAN USE THEM.

     In designing, developing and supporting our wireless data services, we rely
on wireless carriers, wireless handheld device manufacturers, content providers
and software providers. These suppliers may experience difficulty in supplying
us products or services sufficient to meet our needs or they may terminate or
fail to renew contracts for supplying us these products or services on terms we
find acceptable. Any significant interruption in the supply of any of these
products or services could cause a decline in sales of our services unless and
until we are able to replace the functionality provided by these products and
services. Specifically, Novatel Wireless and Sierra Wireless Inc. are our only
suppliers of wireless modems, which are an integral hardware component of our
services. It can be difficult to obtain these wireless modems and their parts.
Although we have purchased a large supply of these modems, they may become
obsolete before we are able to use them. We also depend on third parties to
deliver and support reliable products, enhance their current products, develop
new products on a timely and cost-effective basis and respond to emerging
industry standards and other technological changes. In addition, we rely on the
ability of our content providers -- Reuters, the New York Stock Exchange, Inc.,
the Chicago Board of Trade, the Nasdaq Stock Market, Inc. and the Options Price
Reporting Authority -- to continue to provide us with uninterrupted access to
the news and financial information we provide to our customers. The failure of
third parties to meet these criteria, or their refusal or failure to deliver the
information for whatever reason, could materially harm our business.

OUR SALES CYCLE IS LONG, AND OUR STOCK PRICE COULD DECLINE IF SALES ARE DELAYED
OR CANCELLED.

     Quarterly fluctuations in our operating performance are exacerbated by the
length of time between our first contact with a business customer and the first
revenue from sales of services to that customer or end users. Because our
services represent a significant investment for our business customers, we spend
a substantial amount of time educating them regarding the use and benefits of
our services and they, in turn, spend a substantial amount of time performing
internal reviews and obtaining capital expenditure approvals before purchasing
our services. As much as a year may elapse between the time we approach a
business customer and the time we begin to deliver services to a customer or end
user. Any delay in sales of our services could cause our quarterly operating
results to vary significantly from projected results, which could cause our
stock price to decline. In addition, we may spend a significant amount of time
and money on a potential customer that ultimately does not purchase our
services.

OUR SALES OF FINANCIAL DATA AND TRADING SERVICES COULD DECREASE IF THERE IS A
DECLINE IN SECURITIES TRADING.

     We earn a substantial portion of our revenue (we earned 59.2% for the six
months ended June 30, 2000, or 66.3% on a pro forma basis giving effect to the
acquisitions of LocusOne, Riverbed, NetSearch and IFX and the related formation
of Sila) from services that provide financial information and wireless trading
capability. If there is a prolonged decline in the overall level of securities
trading, or online trading in particular, our operating results may decline. A
decline in securities trading may result from:

     - loss of confidence in the reliability or security of online trading
       systems;

     - government regulation of the securities industry or online trading; or

     - a downturn or volatility in the stock market.

OUR SOFTWARE MAY CONTAIN DEFECTS OR ERRORS, AND OUR SALES COULD GO DOWN IF THIS
INJURES OUR REPUTATION OR DELAYS SHIPMENTS OF OUR SOFTWARE.

     The AIM package of wireless messaging and software development tools we
develop, the ScoutWare family of software products we develop, Sila's
proprietary software and LocusOne's e-mobile software are
                                       10
<PAGE>   10

complex and must meet the stringent technical requirements of our customers. We
must develop our services quickly to keep pace with the rapidly changing
software and telecommunications markets. Software as complex as ours is likely
to contain undetected errors or defects, especially when first introduced or
when new versions are released. Our software may not be free from errors or
defects after delivery to customers has begun, which could result in the
rejection of our software or services, damage to our reputation, lost revenue,
diverted development resources and increased service and warranty costs.

THE STOCKHOLDER AGREEMENT AMONG OUR MAJOR STOCKHOLDERS HAS THE EFFECT OF
ALLOWING THEM TO NOMINATE SEVEN OF OUR TWELVE DIRECTORS, WHICH LIMITS THE
ABILITY OF NEW INVESTORS TO INFLUENCE CONTROL OF AETHER.

     NexGen Technologies, L.L.C., Telcom-ATI Investors, L.L.C., Reuters
MarketClip Holdings Sarl, a subsidiary of Reuters Group Plc., and 3Com
Corporation -- who together hold 34.3% of the shares of our common
stock -- entered into a stockholder agreement that governs voting for our
directors. The agreement provides that each party will vote all of its shares
for one director nominated by NexGen, two directors nominated by Telcom-ATI
Investors, two directors nominated jointly by NexGen and Telcom-ATI Investors
and one director nominated by each of Reuters and 3Com. As a result, seven
directors of our board are nominated by these major stockholders. As we
currently have authorized only 12 directors, the voting rights of our
stockholders other than these major stockholders effectively will be
meaningfully exercised only in connection with the election of five of our
directors. In addition to its effect on the voting rights of our new investors,
the stockholder agreement could have the effect of delaying or preventing a
change in control.

WE MAY NEED ADDITIONAL CAPITAL AND WE MAY NOT BE ABLE TO OBTAIN IT, WHICH COULD
PREVENT US FROM CARRYING OUT OUR BUSINESS STRATEGY.

     We currently anticipate that our available cash resources will be
sufficient to fund our operating needs for at least the next 12 months,
including the expansion of our sales and marketing program and any acquisitions
we may pursue in that period. Thereafter, we expect to require additional
financing in an amount that we cannot determine at this time. We do not have any
bank credit facility or other working capital credit line under which we may
borrow funds for working capital or other general corporate purposes. If our
plans or assumptions change or are inaccurate, we may be required to seek
capital sooner than anticipated. We may need to raise funds through public or
private debt or equity financings.

     If funds are raised through the issuance of equity securities, the
percentage ownership of our then-current stockholders may be reduced and the
holders of new equity securities may have rights, preferences or privileges
senior to those of the holders of our common stock. If additional funds are
raised through a bank credit facility or the issuance of debt securities, the
holder of this indebtedness would have rights senior to the rights of the
holders of our common stock and the terms of this indebtedness could impose
restrictions on our operations. If we need to raise additional funds, we may not
be able to do so on terms favorable to us, or at all. If we cannot raise
adequate funds on acceptable terms, we may not be able to continue to fund our
operations.

NEW LAWS AND REGULATIONS THAT IMPACT OUR INDUSTRY COULD INCREASE OUR COSTS OR
REDUCE OUR OPPORTUNITIES TO EARN REVENUE.

     We are not currently subject to direct regulation by the Federal
Communications Commission or any other governmental agency, other than
regulations applicable to businesses in general. However, in the future, we may
become subject to regulation by the FCC or another regulatory agency. In
addition, the wireless carriers who supply us airtime and certain of our
hardware suppliers are subject to regulation by the FCC and regulations that
affect them could increase our costs or reduce our ability to continue selling
and supporting our services.

OUR STOCK PRICE, LIKE THAT OF MANY TECHNOLOGY COMPANIES, HAS BEEN, AND MAY
CONTINUE TO BE, VOLATILE.

     The market price of our common stock has been highly volatile and is likely
to continue to be highly volatile. The trading price of our common stock has
increased significantly from our initial offering price of $16.00 per share on
October 20, 1999 and has fluctuated from a high of $305 1/16 to a low of $62 in
the six
                                       11
<PAGE>   11

months prior to the date of this prospectus. We are involved in a highly
visible, rapidly changing industry and stock prices in our and similar
industries have risen and fallen in response to a variety of factors, including:

     - announcements of new wireless data communications technologies and new
       providers of wireless data communications;

     - acquisitions of or strategic alliances among providers of wireless data
       communications;

     - changes in recommendations by securities analysts regarding the results
       or prospects of providers of wireless data communications; and

     - changes in investor perceptions of the acceptance or profitability of
       wireless data communications.

WE MAY HAVE TO TAKE ACTIONS THAT ARE DISRUPTIVE TO OUR BUSINESS STRATEGY TO
AVOID REGISTRATION UNDER THE INVESTMENT COMPANY ACT OF 1940.

     As part of our business strategy we own minority and majority equity
interests in a number of ventures. While we believe we are not currently an
investment company, our ownership of these securities could potentially subject
us to registration under the Investment Company Act of 1940, which, absent an
applicable exclusion or exemption, requires registration for companies that are
engaged primarily in the business of investing, reinvesting, owning, holding or
trading in securities. If we were required to register as an investment company,
we would not be able to continue operating our business in accordance with our
business plan. Accordingly, we intend to take all necessary steps to avoid being
deemed an investment company. These necessary steps might disrupt our business
strategy of forming joint ventures with strategic partners and making equity
investments in companies with whom we have a strategic relationship to develop
new technology or extend the reach of existing products and services. A company
may be deemed to be an investment company if it owns investment securities with
a value exceeding 40% of its total assets excluding cash items and government
securities as defined in the Investment Company Act, subject to certain
exclusions and exemptions. Any acquisition or disposition of assets, or
fluctuations in the value of our assets may require us to take steps to avoid
registration under the Investment Company Act. These steps could include buying,
refraining from buying, selling or refraining from selling securities in
circumstances where we would not take these actions except to avoid registration
under the Investment Company Act. For example, we may have to retain majority or
controlling interests in our joint ventures after their initial public
offerings, which would require us to expend significant amounts of capital that
we might otherwise use to expand our products and services in other market
segments. Moreover, we may incur tax liabilities if we are required to sell
assets. We may also be unable to purchase additional investment securities that
may be important to our business strategy. We have applied to the SEC for an
exemptive order declaring that we are not an investment company and are not
required to register under the Investment Company Act. We may not ultimately be
successful in receiving such an order.

WE CONDUCT OPERATIONS IN A NUMBER OF COUNTRIES THROUGH SILA AND ARE SUBJECT TO
RISKS OF INTERNATIONAL OPERATIONS.

     We currently operate outside the United States through Sila, which has
operations throughout Europe and in Singapore. We expect that Sila's management
will independently perform the day-to-day operations of our joint venture and
will not be within our day-to-day control. Any failure by Sila to successfully
implement or maintain services could result in negative publicity and have an
unfavorable impact on our ability to expand our products and services to Europe
and Asia. We face various risks in expanding outside the United States,
including:

     - difficulty and cost of monitoring our international operations;

     - cultural differences in the conduct of business;

     - unexpected changes in regulatory requirements, including U.S. export
       restrictions on encryption technologies; and

     - recessionary or inflationary environments in foreign economies,
       particularly in Asian countries and in the financial services sector.
                                       12
<PAGE>   12

     We cannot assure you that our international operations will contribute
positively to our business, financial condition or result of operations. Our
failure to manage international growth could result in higher operating costs
than anticipated or could delay or preclude altogether our ability to generate
revenues in international markets. In addition, our expanding operations outside
the United States are, in some instances, conducted in currencies other than the
U.S. dollar and fluctuations in the value of foreign currencies relative to the
U.S. dollar could cause currency exchange losses. We cannot predict the effect
of exchange rate fluctuations on our future operating results.

WE HAVE ANTI-TAKEOVER DEFENSES THAT COULD DELAY OR PREVENT AN ACQUISITION OF
AETHER AND COULD ADVERSELY AFFECT THE PRICE OF OUR COMMON STOCK.

     Provisions of our certificate of incorporation and bylaws and provisions of
Delaware law could delay, defer or prevent an acquisition or change of control
of Aether or otherwise adversely affect the price of our common stock. For
example, our bylaws limit the ability of stockholders to call a special meeting.
Moreover, our certificate of incorporation permits our board to issue shares of
preferred stock without stockholder approval, which means that the board could
issue shares with special voting rights or other provisions that could deter a
takeover. In addition to delaying or preventing an acquisition, the issuance of
a substantial number of preferred shares could adversely affect the price of our
common stock.

UPON COMPLETION OF THIS OFFERING, YOU WILL EXPERIENCE DILUTION.

     Our tangible assets are readily identified assets like property, equipment,
cash, securities and accounts receivable. As of June 30, 2000, the value of
these assets on our balance sheet minus the value of our liabilities was $25.69
per share. If the offering price of the shares sold pursuant to this prospectus
exceeds this amount you will be paying more for a share of stock than the value
reflected in our accounts of tangible assets for that share. If we were forced
to sell all our assets and distribute all the proceeds, you would not recover
the amount you paid for shares unless we can sell the assets for more than the
value we report for our tangible assets. We also have outstanding a large number
of stock options and warrants to purchase common stock with exercise prices
significantly below the price of shares in this offering. You will experience
further dilution to the extent these options or warrants are exercised.

SHARES ELIGIBLE FOR FUTURE SALE BY OUR CURRENT STOCKHOLDERS MAY DEPRESS OUR
SHARE PRICE.

     As of October 25, 2000, we had outstanding 39,085,159 shares of common
stock. Sales of a substantial number of our shares of common stock in the public
market -- or the expectation of such sales -- could cause the market price of
our common stock to drop. All the shares sold pursuant to this prospectus will
be, and the shares sold in our initial public offering, our offering in March
2000 and the underwritten offering in September, 2000 are, freely tradable. We
have agreed to register the resale of 17,921,884 shares upon demand beginning on
October 26, 2000 and 462,412 shares beginning on April 30, 2001. However,
pursuant to "lock-up" agreements, holders of 17,267,343 of these 17,921,884
shares have agreed not to offer, sell, contract to sell, grant any option to
purchase or otherwise dispose of these shares or other shares they have the
right to acquire until February 24, 2001. After that time, 13,521,129 shares
(including some of the shares subject to registration rights plus shares held by
officers and directors that are also subject to a lock-up agreement) will be
eligible for sale, subject to a limitation on the number of shares that can be
sold in any three-month period. An additional 4,575,754 shares subject to
registration rights will become eligible for sale without registration at
various times after March 6, 2001 and an additional 462,412 shares will become
eligible for sale without registration on September 14, 2001, in each case
subject to a limitation on the number of shares that can be sold in any
three-month period.

     We filed a registration statement to register all shares of common stock
that were issued to our employees under our equity incentive plan and intend to
file future registration statements. Shares issued upon exercise of stock
options will be eligible for resale in the public market without restriction. As
of September 30, 2000, options and warrants to purchase 5,074,093 shares of our
common stock were issued and outstanding and covered by the registration
statement. In addition, warrants to purchase 893,665 additional shares were
issued and outstanding on that date.

                                       13
<PAGE>   13

DEBT SERVICE OBLIGATIONS MAY ADVERSELY AFFECT OUR CASH FLOW.

     As a result of the $310.5 million of 6% convertible subordinated notes due
2005 currently outstanding, we have a substantial amount of indebtedness,
primarily consisting of the notes. As a result of this indebtedness, we are
obligated to make principal and interest payments. There is a possibility that
we may be unable to generate cash sufficient to pay the principal of, interest
on and other amounts due in respect of our indebtedness when due. We may also
obtain additional long-term debt and working capital lines of credit to meet
future financing needs. We cannot assure you that additional financing
arrangements will be available on commercially reasonable terms or at all.

                                       14
<PAGE>   14

                           FORWARD-LOOKING STATEMENTS

     This prospectus includes forward-looking statements within the meaning of
Section 27A of the Securities Act and Section 21E of the Securities Exchange
Act. We have based these forward-looking statements on our current expectations
and projections about future events. In some cases, you can identify
forward-looking statements by terminology such as "may," "will," "should,"
"could," "pending," "potential," "continue," "expects," "anticipates,"
"intends," "plans," "believes," "predicts," "estimates" and similar expressions,
although not all forward-looking statements are identified by these words. These
forward-looking statements are subject to a number of risks, uncertainties and
assumptions about Aether and our industry, including those we describe in the
"Risk Factors" section of this prospectus. In light of these risks,
uncertainties and assumptions, the forward-looking events discussed in this
prospectus might not occur. We undertake no obligation to publicly update or
revise any forward-looking statements, whether as a result of new information,
future events or otherwise.

                                USE OF PROCEEDS

     This prospectus relates to shares of our common stock being offered and
sold for the accounts of the selling stockholders named in this prospectus. We
will not receive any proceeds from the shares sold pursuant to this prospectus.

                                    DILUTION

     If you invest in our shares of common stock, your interest will be diluted
by the amount of the difference between the offering price per share and the net
tangible book value per share of common stock. Our net tangible book value as of
June 30, 2000 was $979.8 million, or $25.69 per share of common stock. Net
tangible book value per share is equal to our total tangible assets less total
liabilities, divided by the number of outstanding shares of common stock. The
amount of dilution will depend on the offering price of the shares sold pursuant
to this prospectus. If the offering price were equal to the closing market price
of $94.125 on October 26, 2000, the dilution would be $68.435 per share of
common stock. The following table illustrates this per share dilution to new
investors:

<TABLE>
<S>                                                            <C>
Assumed offering price per share............................   $94.125

Net tangible book value per share as of June 30, 2000.......   $ 25.69
                                                               -------
Dilution per share to new investors in this offering........   $68.435
                                                               =======
</TABLE>

     As of June 30, 2000, we had outstanding options to purchase 3,736,290
shares under our equity incentive plan at a weighted average exercise price of
$46.56 per share and warrants to purchase 1,099,833 shares at a weighted average
exercise price of $1.98 per share. In addition, we had outstanding warrants to
purchase 893,665 shares with an exercise price of $.01 per share.

                                       15
<PAGE>   15

                              SELLING STOCKHOLDERS

     The following table sets forth certain information with respect to
beneficial ownership of our common stock as of October 25, 2000, as adjusted to
reflect the sale of 1,143,949 shares of common stock pursuant to this
prospectus, as to each stockholder selling shares of our common stock pursuant
to this prospectus.

     Except as indicated in the footnotes to this table and under applicable
community property laws, to our knowledge, the persons named in the table have
sole voting and investment power with respect to all shares of common stock. For
the purposes of calculating percent ownership as of October 25, 2000, 39,085,159
shares were issued and outstanding.

     The persons selling shares pursuant to this prospectus may include
pledgees, donees, transferees or other successors in interest of the persons
identified below as selling stockholders.

<TABLE>
<CAPTION>
                                                  OWNERSHIP OF         SHARES OF        OWNERSHIP OF
                                                SHARES BEFORE THE       COMMON        SHARES AFTER THE
                                                   OFFERING(1)           STOCK           OFFERING(2)
                                                -----------------   COVERED BY THIS   -----------------
             SELLING STOCKHOLDERS               NUMBER    PERCENT     PROSPECTUS      NUMBER    PERCENT
             --------------------               -------   -------   ---------------   -------   -------
<S>                                             <C>       <C>       <C>               <C>       <C>
Abbott Capital Private Equity Fund II, L.P.
  (3).........................................      604     *               604             0     *
Agarwal, Puneet Rishi (3).....................       38     *                38             0     *
Alaska State Pension Investment Board (3).....      927     *               927             0     *
Baghdasarian, Zarch (3).......................       81     *                81             0     *
Banatao, Diosdado P. (3)......................    1,064     *             1,064             0     *
Battat, Randall S. (3)........................       32     *                32             0     *
Beck, James T. (3)............................      343     *               343             0     *
Beebe, Andrew (3).............................       33     *                33             0     *
Bell Atlantic -- North (3)....................   10,073     *            10,073             0     *
Bolsa VI, LLC (3).............................      403     *               403             0     *
Brenner Family Revocable Trust (3)............       81     *                81             0     *
Brooks, Todd A. (3)...........................    1,064     *             1,064             0     *
Burness, Patrica Gail (3).....................       24     *                24             0     *
Carlson, Curtis (3)...........................       33     *                33             0     *
Cash, James I., Jr. (3).......................       81     *                81             0     *
CCI Partners I (3)............................       49     *                49             0     *
Cerf, Vinton G. (3)...........................       32     *                32             0     *
Champion Ventures 1999, L.P. (3)..............    2,014     *             2,014             0     *
Champion, Rohan (3)...........................       33     *                33             0     *
Ciabatta, LLC (3).............................       49     *                49             0     *
CJG Trust (3).................................       32     *                32             0     *
Clapp, Mari Mineta (3)........................       17     *                17             0     *
CNA Trust, TTEE for Standling, Yocca, Carlson
  & Rauth, P.S.P. FBO William R. Rauth III
  (3).........................................       81     *                81             0     *
Coleman, Caretha (3)..........................       16     *                16             0     *
Community Foundation Silicon Valley (3).......      403     *               403             0     *
Cooney, C. Michael, IRA Rollover (3)..........       81     *                81             0     *
Couch, John D. (3)............................       81     *                81             0     *
Couch, Richard G. & Julie Norris (3)..........       32     *                32             0     *
Dalal Revocable Trust (3).....................    2,659     *             2,659             0     *
Dartmouth College, Trustees of (3)............    2,418     *             2,418             0     *
Davis, Rebecca Carol (3)......................       19     *                19             0     *
De Gheest, Anne (3)...........................       33     *                33             0     *
Devan, Sundar Vasu (3)........................       81     *                81             0     *
DiMarco/Harleen Revocable Trust (3)...........       81     *                81             0     *
Diner, Fahri (3)..............................       81     *                81             0     *
</TABLE>

                                       16
<PAGE>   16

<TABLE>
<CAPTION>
                                                  OWNERSHIP OF         SHARES OF        OWNERSHIP OF
                                                SHARES BEFORE THE       COMMON        SHARES AFTER THE
                                                   OFFERING(1)           STOCK           OFFERING(2)
                                                -----------------   COVERED BY THIS   -----------------
             SELLING STOCKHOLDERS               NUMBER    PERCENT     PROSPECTUS      NUMBER    PERCENT
             --------------------               -------   -------   ---------------   -------   -------
<S>                                             <C>       <C>       <C>               <C>       <C>
Dolce, James A., Jr. (3)......................       81     *                81             0     *
Donohue, William R. (3).......................       32     *                32             0     *
Duke University, Employees' Retirement Plan of
  (3).........................................      806     *               806             0     *
Emory University (3)..........................    5,037     *             5,037             0     *
Employee Holdings (3).........................      305     *               305             0     *
Endowment Venture Partners IV (3).............    8,059     *             8,059             0     *
Excelsior Private Equity Investors Fund II,
  Inc. (3)....................................    2,015     *             2,015             0     *
Fallen Oak Partners (3).......................    1,064     *             1,064             0     *
Fena, Lori K. (3).............................       33     *                33             0     *
Fisher, Ora Tova (3)..........................       48     *                48             0     *
FLAG Venture Partners III, L.P. (3)...........    7,253     *             7,253             0     *
Fong, Kevin A.& Sally J. Fong Trust, The
  (3).........................................    2,659     *             2,659             0     *
Ford Foundation (3)...........................    8,059     *             8,059             0     *
Frantz, L. Scott (3)..........................      101     *               101             0     *
Fujimura Family Trust (3).....................       32     *                32             0     *
Gallo Family Partnership (3)..................       49     *                49             0     *
Garrett, Todd A. (3)..........................       16     *                16             0     *
GCWF Investment Partners II (3)...............       32     *                32             0     *
Gibbons, Fred M., Separate Property Trust
  (3).........................................       33     *                33             0     *
Gothic Corporation (3)........................    2,014     *             2,014             0     *
Greenhouse Associates (3).....................      403     *               403             0     *
Haber, Scott R. (3)...........................       47     *                47             0     *
HarbourVest Partners VI (3)...................    3,626     *             3,626             0     *
Harmony Investment Limited (3)................      604     *               604             0     *
Harris, John F. Revocable Trust (3)...........       32     *                32             0     *
Harvard -- Yenching Institute (3).............      403     *               403             0     *
Harvard Management Private Equity Corporation
  (3).........................................    3,626     *             3,626             0     *
Harvard Master Trust (3)......................      806     *               806             0     *
Hawaii, State of, Employees' Retirement System
  (3).........................................      806     *               806             0     *
HB-PGGM Fund III, LP (3)......................    2,821     *             2,821             0     *
Heidrich, A. Grant III & Jeanette Yvonne,
  Community Property (3)......................    2,659     *             2,659             0     *
Herzig, Alan (3)..............................       81     *                81             0     *
Hewlett-Packard and Agilent Technologies
  Retirement Plans (3)........................    3,022     *             3,022             0     *
Hirsch, Russell C. (3)........................    1,064     *             1,064             0     *
Holman Group Inc. Money Purchase Pension Trust
  (3).........................................       17     *                17             0     *
Horsley Bridge Fund VI, L.P. (3)..............   19,341     *            19,341             0     *
Hutton Living Trust (3).......................    1,064     *             1,064             0     *
IGSB EVP III, L.P. (3)........................    1,295     *             1,295             0     *
IGSB External Venture Fund III, L.P. (3)......      599     *               599             0     *
J.P. Morgan (3)...............................   10,073     *            10,073             0     *
Jones, Jennifer V. (3)........................       82     *                82             0     *
Kailath Revocable Trust, Thomas & Sarah (3)...       33     *                33             0     *
Kapoor, Rajil (3).............................       49     *                49             0     *
Karlgaard, Richard Patric (3).................       16     *                16             0     *
</TABLE>

                                       17
<PAGE>   17

<TABLE>
<CAPTION>
                                                  OWNERSHIP OF         SHARES OF        OWNERSHIP OF
                                                SHARES BEFORE THE       COMMON        SHARES AFTER THE
                                                   OFFERING(1)           STOCK           OFFERING(2)
                                                -----------------   COVERED BY THIS   -----------------
             SELLING STOCKHOLDERS               NUMBER    PERCENT     PROSPECTUS      NUMBER    PERCENT
             --------------------               -------   -------   ---------------   -------   -------
<S>                                             <C>       <C>       <C>               <C>       <C>
Kauffman, Ewing Marion Foundation (3).........      806     *               806             0     *
Kaufman Trust, Christopher L. (3).............       81     *                81             0     *
Kawasaki Family Trust, Guy T. Kawasaki,
  Trustee (3).................................       32     *                32             0     *
Kennedy, Joseph S. (3)........................       81     *                81             0     *
Kerman Family Trust (3).......................       95     *                95             0     *
Klein, Arthur (3).............................       32     *                32             0     *
Knightsbridge Netherlands II L. P. (3)........      806     *               806             0     *
Knightsbridge Venture Capital III (3).........      806     *               806             0     *
Knightsbridge Venture Capital IV, L.P. (3)....    2,015     *             2,015             0     *
Kucherlapati, Raju (3)........................      403     *               403             0     *
Kuhn, Eric Jonathan (3).......................       33     *                33             0     *
Ladd, David J. (3)............................    1,064     *             1,064             0     *
Latham & Watkins (3)..........................      286     *               286             0     *
Lefteroff, Tracy (3)..........................       81     *                81             0     *
Levin, Mark & Becky (3).......................      403     *               403             0     *
Levinthal/Schlein Family Trust, The (3).......    5,318     *             5,318             0     *
Levy, Alan (3)................................       48     *                48             0     *
Mandato Family Trust (3)......................       81     *                81             0     *
Massachusetts Institute of Technology (3).....   11,282     *            11,282             0     *
Massachusetts Institute of Technology
  Retirement Plan (3).........................    3,224     *             3,224             0     *
Mayfield X Management LLC (3).................   55,356     *            55,356             0     *
Merrick, Phillip (3)..........................       81     *                81             0     *
Moldow Family Trust, Charles Moldow, Trustee
  (3).........................................       81     *                81             0     *
Moll, Frederic H. (3).........................       81     *                81             0     *
Morgan, Allen L. (3)..........................    1,064     *             1,064             0     *
MSD Portfolio LP -- Investments (3)...........    2,015     *             2,015             0     *
Mueller, Nancy S. Revocable Trust I (3).......    1,289     *             1,289             0     *
Myers, Frank G., Jr. & Susan F., Ttees, Trust
  (3).........................................    1,064     *             1,064             0     *
Nassau Capital Funds L.P. (3).................    6,044     *             6,044             0     *
Naumann, Alan P. & Masami F. Trust (3)........       81     *                81             0     *
Newton, A. Richard (3)........................       65     *                65             0     *
Odyssey Capital II, LLC (3)...................       81     *                81             0     *
Olson Family Trust (3)........................       16     *                16             0     *
Peninsula Community Foundation (3)............      403     *               403             0     *
Red Rock Partners, Ltd. (3)...................       81     *                81             0     *
Rensselaer Polytechnic Institute (3)..........    1,813     *             1,813             0     *
Reynolds Trust, The (3).......................       81     *                81             0     *
S&P Investment Partners (3)...................       81     *                81             0     *
Sawhney, Mohanbir S. (3)......................       32     *                32             0     *
Scinet Development & Holdings, Inc. (3).......      161     *               161             0     *
Settle, Dana (3)..............................      419     *               419             0     *
Shah, Nimish (3)..............................       81     *                81             0     *
Shing Kwan Investment Co. Ltd. (3)............      403     *               403             0     *
Silicon Valley Bancshares (3).................       81     *                81             0     *
Silverman Family Trust Agreement (3)..........       81     *                81             0     *
Smith, Lonnie M. (3)..........................       33     *                33             0     *
Sprague, Robert R., Trust, The (3)............      201     *               201             0     *
</TABLE>

                                       18
<PAGE>   18

<TABLE>
<CAPTION>
                                                  OWNERSHIP OF         SHARES OF        OWNERSHIP OF
                                                SHARES BEFORE THE       COMMON        SHARES AFTER THE
                                                   OFFERING(1)           STOCK           OFFERING(2)
                                                -----------------   COVERED BY THIS   -----------------
             SELLING STOCKHOLDERS               NUMBER    PERCENT     PROSPECTUS      NUMBER    PERCENT
             --------------------               -------   -------   ---------------   -------   -------
<S>                                             <C>       <C>       <C>               <C>       <C>
H}Stanford, Leland Junior University (3)......   12,088     *            12,088             0     *
Stone, R. Gregg Trust (3).....................      101     *               101             0     *
Superior Partners, Ltd. (3)...................      604     *               604             0     *
Swanson Family Fund, Ltd. (3).................      403     *               403             0     *
T.H. eVenture Fund (3)........................    2,015     *             2,015             0     *
Ting, Annsheng C & Dennis W. (3)..............       32     *                32             0     *
Uhlman, Thomas M. (3).........................       81     *                81             0     *
Unger-Luchsinger Family Trust, The (3)........    1,064     *             1,064             0     *
University of Notre Dame (3)..................    3,223     *             3,223             0     *
Utah Retirement Systems (3)...................      484     *               484             0     *
Valley Partners III (3).......................    1,144     *             1,144             0     *
Van Auken, Wendell G. & Ethel S. Trust, The
  (3).........................................    1,064     *             1,064             0     *
Vasan, Robin T. Trust (3)(4)..................    1,064     *             1,064             0     *
Vertex International Partners Inc. (3)........      403     *               403             0     *
Vertex Venture Holdings (3)...................      537     *               537             0     *
Vidal, Ronald J. (3)..........................       81     *                81             0     *
Wallman, Steven M. H. (3).....................       81     *                81             0     *
WS Investment Company 2000A (3)...............      513     *               513             0     *
Yale University (3)...........................   12,088     *            12,088             0     *
Yale University Retirement Plan for Staff
  Employees (3)...............................    1,209     *             1,209             0     *
Noblestar Systems Corp. ......................  596,781    1.5 %        561,268        35,513     *
David Rensin (5)..............................  204,780     *           192,594        12,186     *
Steve Roth....................................   25,928     *            24,345         1,583     *
Douglas E. Morrison (6).......................   21,972     *            20,507         1,465     *
Gregory C. Visalli (6)........................   20,622     *            19,157         1,465     *
Joe Nardone (6)...............................   24,622     *            23,157         1,465     *
Michael P. Thompson...........................   20,622     *            19,157         1,465     *
Kate June Opalack.............................    5,432     *             5,100           332     *
Matthew Paul Opalack..........................    5,432     *             5,100           332     *
Nancy W. Opalack..............................    5,432     *             5,100           332     *
Elizabeth Ruth Rensin Irrevocable Trust.......    2,898     *             2,721           177     *
Paul Pocialik.................................    2,066     *             1,943           123     *
Ann J. and Robert E. Replogle.................    1,449     *             1,361            88     *
Beulah E. and Thomas R. Lam...................    1,449     *             1,361            88     *
Cynthia L. Jackson (7)........................  159,219     *             2,721       156,321     *
Joan H. and E. Wayne Jackson, Jr. (8).........    1,449     *             1,361            88     *
The Adam Wayne Jackson Irrevocable Trust
  (9).........................................    1,449     *             1,361            88     *
The Audrey Louise Jackson Irrevocable Trust
  (9).........................................    1,449     *             1,361            88     *
The Nicholas Wayne Jackson Irrevocable Trust
  (9).........................................    1,448     *             1,360            88     *
Dolores S. Gaudrey............................    1,449     *             1,361            88     *
Timothy M. Lam................................    1,448     *             1,360            88     *
Jay Altizer...................................      211     *               198            13     *
</TABLE>

---------------
 *  Less than 1%.

(1) Includes shares of common stock which are being held in escrow in connection
    with the Riverbed acquisition but which are beneficially owned by such
    stockholder.

(2) Assuming all of the shares covered by this prospectus are sold.

                                       19
<PAGE>   19

(3) Since the time we registered on Form S-1 (Registration No. 333-45656) the
    shares of common stock held by Mayfield X L.P., Mayfield Associates Fund V,
    L.P. and Mayfield Principals Fund, L.L.C., one of these entities distributed
    a portion of its registered shares to this selling stockholder. Mayfield X
    L.P. continues to beneficially own 649,891 shares of our common stock, none
    of which is registered. Mayfield Associates Fund V, L.P. continues to
    beneficially own 22,409 shares of our common stock, none of which is
    registered. Mayfield Principals Fund, L.L.C. continues to beneficially own
    74,700 shares of our common stock, none of which is registered.

(4) Mr. Vasan, who is the beneficial owner of this trust, is a director of
    Aether.

(5) Is an employee of OmniSky, in which Aether has an equity interest.

(6) Is an employee of Aether.

(7) Includes 156,321 shares and options owned by her husband E. Wayne Jackson
    III, who is a director and executive officer of Aether.

(8) Are the parents of E. Wayne Jackson III, who is a director and executive
    officer of Aether.

(9) The trust is established for the benefit of a child of E. Wayne Jackson III,
    who is a director and executive officer of Aether.

                                       20
<PAGE>   20

                              PLAN OF DISTRIBUTION

     We have been advised that the selling stockholders (and their pledgees,
donees, transferees and other successors in interest) may offer shares of common
stock from time to time depending on market conditions and other factors, in one
or more transactions on the Nasdaq National Market, or any other national
securities exchanges or over-the-counter markets on which the shares may be
traded, or in negotiated transactions, at market prices prevailing at the time
of sale, at prices related to those market prices, at negotiated prices or at
fixed prices.

     Sales of shares of common stock by the selling stockholders may involve (i)
block transactions in which the broker or dealer so engaged will attempt to sell
the shares as agent but may position and resell a portion of the block as
principal to facilitate the transaction, (ii) purchases by a broker-dealer as
principal and resale by such broker-dealer for its own account pursuant to this
prospectus, (iii) ordinary brokerage transactions and transactions in which a
broker solicits purchasers and (iv) privately negotiated transactions. To the
extent required, this prospectus may be amended and supplemented from time to
time to describe a specific plan of distribution. In connection with the
distribution of the shares of common stock or otherwise, the selling
stockholders may enter into hedging transactions with broker-dealers. In
connection with such transactions, broker-dealers may engage in short sales of
the common stock in the course of hedging the position they assume with the
selling stockholders. The selling stockholders may also sell the common stock
short and redeliver the shares to close out such short positions.

     The selling stockholders may also enter into option transactions (including
call or put option transactions) or other transactions with broker-dealers which
require delivery to such broker-dealer of shares offered hereby, which shares
such broker-dealer may resell pursuant to this prospectus (as supplemented or
amended to reflect such transaction, if necessary). The selling stockholders may
also pledge shares to a broker-dealer and, upon a default, such broker-dealer
may effect sales of the pledged shares pursuant to this prospectus (as
supplemented or amended to reflect such transaction, if necessary). The selling
stockholders may also sell the common stock through one or more underwriters on
a firm commitment or best-efforts basis (with a supplement or amendment to this
prospectus, if necessary). In addition, any shares that qualify for sale
pursuant to Rule 144 may be sold under Rule 144 rather than pursuant to this
prospectus.

     Brokers and dealers may receive compensation in the form of concessions or
commissions from the selling stockholders and/or purchasers of shares for whom
they may act as agent and/or to whom they may sell as principal (which
compensation may be in excess of customary commissions). The selling
stockholders and any broker or dealer that participates in the distribution of
shares may be deemed to be underwriters and any commissions received by them and
any profit on the resale of shares positioned by a broker or dealer may be
deemed to be underwriting discounts and commissions under the Securities Act. We
have agreed to indemnify the selling stockholders, the officers, directors,
partners, agents and employees of the selling stockholders, any underwriter (as
defined in the Securities Act) for such selling stockholder, and each person, if
any, who controls such selling stockholder or underwriter within the meaning of
the Securities Act or the Exchange Act against certain liabilities, including
liabilities arising under the Securities Act or the Exchange Act. The selling
stockholders may agree to indemnify any agent or broker-dealer that participates
in transactions involving sales of the shares of common stock against certain
liabilities, including liabilities arising under the Securities Act.

     We have advised the selling stockholders that Regulation M under the
Exchange Act may apply to sales of shares and to the activities of the selling
stockholders or broker-dealers in connection therewith. We will bear all costs,
expenses and fees in connection with the registration of the shares of common
stock covered by this prospectus. The selling stockholders will bear any
brokerage commissions and similar selling expenses, if any, attributable to the
sale of the shares.

     The selling stockholders may also sell shares under Rule 144 under the
Securities Act, if available, rather than under this prospectus.

                                       21
<PAGE>   21

                                 LEGAL MATTERS

     The validity of the common stock offered hereby will be passed upon for
Aether by Wilmer, Cutler & Pickering, Washington, D.C. George P. Stamas, a
consultant to Wilmer, Cutler & Pickering, is a director of Aether. Mr. Stamas
owns options to purchase 16,250 shares of common stock, and he holds a non-
voting interest in Telcom-ATI Investors, which owns 6,851,274 shares of common
stock.

                                    EXPERTS

     The consolidated financial statements and schedule of Aether Systems, Inc.
as of December 31, 1998 and 1999, and for each of the years in the three-year
period ended December 31, 1999 have been incorporated by reference in this
prospectus and elsewhere in the registration statement in reliance upon the
report of KPMG LLP, independent certified public accountants, incorporated by
reference herein, and upon the authority of said firm as experts in accounting
and auditing.

     The financial statements of Mobeo, Inc. as of December 31, 1997 and 1998
and for each of the three years in the period ended December 31, 1998 have been
incorporated by reference in this prospectus and elsewhere in the registration
statement in reliance on the report of PricewaterhouseCoopers LLP, independent
accountants, given on the authority of said firm as experts in auditing and
accounting.

     The financial statements of LocusOne Communications, Inc. as of December
31, 1998 and 1999, and for each of the years then ended have been incorporated
by reference in this prospectus and elsewhere in the registration statement in
reliance upon the reports of KPMG LLP, independent certified public accountants,
incorporated by reference herein, and upon the authority of said firm as experts
in accounting and auditing.

     The financial statements of Riverbed Technologies, Inc. as of December 31,
1998 and 1999, and for the period from October 21, 1998 (date of inception) to
December 31, 1998 and for the year ended December 31, 1999, have been
incorporated by reference in this prospectus and elsewhere in the registration
statement in reliance upon the report of KPMG LLP, independent certified public
accountants, incorporated by reference herein, and upon the authority of said
firm as experts in accounting and auditing.

                      WHERE YOU CAN FIND MORE INFORMATION

     We are subject to the informational requirements of the Securities Exchange
Act and we file reports, proxy and information statements and other information
with the SEC. You may read and copy all or any portion of the reports, proxy and
information statements or other information we file at the SEC's principal
office in Washington, D.C., and copies of all or any part thereof may be
obtained from the Public Reference Section of the SEC, 450 Fifth Street, N.W.,
Washington, D.C. 20549, and at the SEC's regional offices located at Citicorp
Center, 500 West Madison Street, Suite 1400, Chicago, Illinois 60661 and at 7
World Trade Center, 13th Floor, New York, New York 10048 after payment of fees
prescribed by the SEC. Please call the SEC at 1-800-SEC-0330 for further
information on operation of the public reference rooms. The SEC also maintains a
Web site which provides online access to reports, proxy and information
statements and other information regarding registrants that file electronically
with the SEC at the address http://www.sec.gov.

     We have filed with the SEC a Registration Statement on Form S-3 under the
Securities Act with respect to the common stock to be sold in this offering.
This prospectus does not contain all of the information set forth in the
Registration Statement and the exhibits to the Registration Statement. For
further information with respect to Aether and our common stock offered hereby,
reference is made to the Registration Statement and the exhibits filed as a part
of the Registration Statement. Statements contained in this prospectus
concerning the contents of any contract or any other document are not
necessarily complete; reference is made in each instance to the copy of such
contract or any other document filed as an exhibit to the Registration
Statement. Each such statement is qualified in all respects by such reference to
such exhibit. The Registration Statement, including exhibits thereto, may be
inspected without charge at the locations described above, or obtained upon
payment of fees prescribed by the SEC.

                                       22
<PAGE>   22

     The Securities and Exchange Commission also allows Aether to "incorporate
by reference" information into this prospectus. This means that Aether can
disclose important information to you by referring you to another document filed
separately with the Securities and Exchange Commission. The information
incorporated by reference is considered to be part of this prospectus, except
for any information that is superseded by information that is included directly
in this document, or any future filings with the Securities and Exchange
Commission made under Sections 13(a), 13(c), 14 or 15(d) of the Securities
Exchange Act of 1934.

     This prospectus incorporates by reference the documents listed below:

     - Aether's Annual Report on Form 10-K for the fiscal year ended December
       31, 1999.

     - Aether's Quarterly Reports on Form 10-Q for the quarters ended September
       30, 1999, March 31, 2000 and June 30, 2000.

     - Aether's Current Reports on Form 8-K dated February 3, 2000, March 6,
       2000, April 6, 2000 and September 14, 2000, including any amendments.

     - The Description of Capital Stock contained in Aether's Registration
       Statement on Form S-1 (Registration No. 333-45656) dated September 27,
       2000, including any amendments or reports filed for the purpose of
       updating such description.

     - In addition, all documents subsequently filed by Aether pursuant to
       Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act prior to the
       termination of the offering shall be deemed to be incorporated by
       reference herein from their respective dates of filing.

     You may request a copy of any filings incorporated by reference in this
prospectus from Aether by contacting:

                                Kevin Connelly
                                Controller
                                Aether Systems, Inc.
                                11460 Cronridge Drive
                                Owings Mills, Maryland 21117
                                Telephone: (410) 654-6400

     You should rely only on the information incorporated by reference or
provided in this prospectus. Aether has not authorized anyone else to provide
you with different or additional information. You should not assume that the
information in this prospectus is accurate as of any date other than the date
set forth on the front cover.

                                       23
<PAGE>   23

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------

                                1,143,949 SHARES

                                 [AETHER LOGO]

                                  COMMON STOCK

                             ----------------------
                                   PROSPECTUS
                             ----------------------

                               NOVEMBER 13, 2000

--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission