CoStar Group
CSGP
#1868
Rank
$11.02 B
Marketcap
$27.21
Share price
-1.84%
Change (1 day)
-67.41%
Change (1 year)
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1


SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C.
20549

FORM 10-K

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF
THE SECURITIES EXCHANGE ACT OF 1934

FOR THE FISCAL YEAR ENDED DECEMBER 31, 2000

COMMISSION FILE NUMBER 0-24531

COSTAR GROUP, INC.
(EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

DELAWARE 52-2091509
(STATE OR OTHER JURISDICTION OF (I.R.S. EMPLOYER
INCORPORATION OR ORGANIZATION) IDENTIFICATION NO.)

2 BETHESDA METRO CENTER, 10TH FLOOR
BETHESDA, MARYLAND 20814
(ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (ZIP CODE)

REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE (301) 215-8300

SECURITIES REGISTERED PURSUANT TO SECTION 12(b) OF THE ACT: NONE
SECURITIES REGISTERED PURSUANT TO SECTION 12(g) OF THE ACT: COMMON STOCK
($.01 PAR VALUE)

Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 of 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements of the past 90 days. Yes [X] No [ ]

Indicate by check mark if disclosure of delinquent filers pursuant to
Item 405 of Regulation S-K is not contained herein, and will not be contained,
to the best of registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
statement to this Form 10-K. [X]

Based on the closing price of the common stock on March 15, 2001 on the
NASDAQ Stock Market, the aggregate market value of registrant's common stock
held by non-affiliates of the registrant was approximately $220.6 million.

As of March 15, 2001, there were 15,583,505 shares of registrant's
common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrant's definitive proxy statement, which is expected to be
filed with the Securities and Exchange Commission within 120 days after the end
of the registrant's fiscal year, are incorporated by reference into Part III of
this Report.
2


TABLE OF CONTENTS
<TABLE>
<S> <C> <C>
PART I
Item 1 Business...............................................................................................3

Item 2 Properties ............................................................................................10

Item 3 Legal Proceedings .....................................................................................10

Item 4 Submission of Matters to a Vote of Security Holders ...................................................10

PART II

Item 5 Market for the Registrant's Common Stock and Related Stockholder Matters ..............................11

Item 6 Selected Consolidated Financial and Operating Data ....................................................12

Item 7 Management's Discussion and Analysis of Financial Condition and
Results of Operations..................................................................................13

Item 7A Quantitative and Qualitative Disclosures about Market Risk ............................................23

Item 8 Financial Statements and Supplementary Data ...........................................................23

Item 9 Changes in and Disagreements with Accountants, on Accounting
and Financial Disclosure...............................................................................23

PART III

Item 10 Directors and Executive Officers of the Registrant ....................................................23

Item 11 Executive Compensation ................................................................................23

Item 12 Security Ownership of Certain Beneficial Owners and Management ........................................23

Item 13 Certain Relationships and Related Transactions ........................................................24

PART IV

Item 14 Exhibits, Financial Statement Schedules and Reports on Form 8-K .......................................24


Index To Consolidated Financial Statements .......................................................................F-1
</TABLE>
3


ITEM 1 BUSINESS

(In this report, the words "we", "our", "us", "CoStar" or the "Company"
refer to CoStar Group, Inc. and its subsidiaries. This report also refers to our
Web site, but information contained on that site is not part of this report.)

CoStar Group, Inc. is the leading provider of information services to
the U.S. commercial real estate industry. CoStar's suite of products offers
customers access via the Internet to the most comprehensive, verified database
of commercial real estate information in over 50 U.S. markets.

Since its founding in 1987 and its subsequent incorporation in Delaware
in 1998 to succeed its predecessor companies, CoStar's strategy has been to
provide commercial real estate professionals with critical knowledge to complete
transactions, by offering the most up-to-date, consolidated, and standardized
information on U.S. commercial real estate. CoStar delivers its content to
customers through ten distinct products and services. Our wide array of digital
service offerings includes a leasing marketplace, a selling marketplace, sales
comparable information, data hosting for clients' web sites, decision support,
contact management, tenant information, property data integration, property
marketing, and industry news. Today, we are creating a centralized digital
marketplace where the commercial real estate industry and related businesses can
continuously interact and easily facilitate transactions over the Internet due
to efficient exchange of accurate and standardized information supplied by
CoStar.

We have five assets that provide a unique foundation for this
marketplace: the most comprehensive, proprietary, national database in the
industry; the largest research department in the industry; proprietary
technology including in-house product development; a broad suite of digital
products and services; and what we believe is the largest number of
participating organizations. Our database has been constructed over more than a
decade by a research department that makes updates daily to our database
throughout the year. In addition to our internal efforts to grow the database,
we have obtained and assimilated over 50 proprietary databases. The database now
contains information on more than 20 billion square feet of commercial real
estate, over one million tenants, and covers more than $70.6 billion in
properties for sale.

INDUSTRY OVERVIEW

We believe that the market for commercial real estate information is
vast based on the variety, volume, and value of transactions related to
commercial real estate. Each transaction has multiple information requirements,
and in order to facilitate transactions, industry participants must have
extensive, accurate, and current information. Members of the commercial real
estate and related business community require daily access to current data such
as rental rates, vacancy rates, tenant movements, supply, new construction,
absorption rates, and other important market developments to carry out their
businesses effectively. Such data collection is time-consuming, as shown by a
1996 study we commissioned, which found that commercial real estate
professionals spent 40% of their workday collecting and analyzing information on
the real estate market. There is a strong need for an efficient marketplace,
where commercial real estate professionals can exchange information, evaluate
opportunities using national standardized data, and interact with each other on
a continuous basis.

A large number of parties involved in the commercial real estate and
related business community require extensive information, including:

- Sales and leasing brokers
- Property owners
- Property managers
- Design and construction professionals
- Real estate developers
- Real estate investment trust managers
- Investment bankers
- Commercial bankers
- Investors and asset managers
- Government agencies' staff members
- Mortgage-backed security issuers
- Appraisers
- Reporters
- Tenant vendors
- Building services vendors
- Communications providers
- Insurance companies' managers
- Institutional advisors

The commercial real estate and related business community generally
operates in an inefficient marketplace because of the fragmented approach to
gathering and exchanging information within the marketplace. Various
organizations, including hundreds of brokerage firms, directory publishers, and
local research companies, have attempted to collect data on specific markets and
develop software to analyze the information they have independently gathered.
This highly fragmented methodology has resulted in duplication of effort in the
collection and analysis of information, excessive internal cost and the creation
of non-standardized data containing varying degrees of accuracy and
comprehensiveness, thus spawning a formidable information gap.



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The creation of an efficient digital marketplace for commercial real
estate requires an infrastructure of a national, standardized database, accurate
and comprehensive research capabilities, and intensive, real-time participant
interaction. By combining its extensive database, approximately 700 experienced
researchers, technological expertise and broad customer base, CoStar believes
that it has created the platform for this national exchange. Our infrastructure
combined with Internet technology has allowed CoStar to develop a truly
centralized and interactive marketplace.

The Internet has emerged as a mass communications and commerce medium
enabling millions of people worldwide to share information, create community
among individuals with similar interests, and conduct business electronically.
In addition to its emergence as a mass communications medium, the Internet has
features and functions that are unavailable in traditional media. These features
enable users to:

- retrieve enormous amounts of information at low cost and without
geographic limitation;
- access dynamic and interactive content on a real-time basis; and
- communicate and interact instantaneously with a single individual or
with large groups of users.

COSTAR'S COMPREHENSIVE, NATIONAL DATABASE

CoStar has spent 14 years building and acquiring a proprietary database
of commercial real estate information, which includes leasing, sales, comparable
sales, tenants, demand statistics and digital images.

As of December 31, 2000, our proprietary database contained:

- more than 20 billion square feet of U.S. commercial real estate;
- over 800,000 properties;
- over 2.3 billion square feet of space available;
- approximately 59,000 properties for sale;
- over 1 million tenants occupying commercial real estate space;
- more than 583,000 sales transactions valued at over $750 billion; and
- over 968,000 high-resolution digital images, including building
photographs, aerial photographs, plat maps and floor plans.

This highly complex database is comprised of hundreds of data fields, tracking
such categories as:

- Location
- Site and zoning information
- Building characteristics
- Space availability
- Tax assessments
- Ownership
- Sales comparables
- Mortgage and deed information
- For-sale information
- Income and expense histories
- Tenant names
- Lease expirations
- Contact information
- Historical trends

COSTAR RESEARCH

We have developed a sophisticated data collection organization utilizing
a multi-faceted research process. In 2000, our researchers drove approximately
one million miles, conducted hundreds of thousands of on-site building
inspections, examined more than 60 million public records, and interviewed
approximately one million tenants, owners and brokers.

Research Department. As of December 31, 2000, approximately 700
commercial real estate research professionals conducted research for CoStar.
Every research employee undergoes an extensive training program to maintain
consistent research methods and processes. Our researchers collect and analyze
commercial real estate information through millions of phone calls, e-mails,
Internet updates and faxes each year, in addition to field inspections, public
records review, news monitoring, and direct mail. Each researcher is responsible
for maintaining the accuracy and reliability of the database. As part of their
update process, researchers develop cooperative relationships with industry
professionals that allow them to gather useful information. Because of the
importance commercial real estate professionals place on our data and our
prominent position in the industry, these professionals frequently take the
initiative and report transactions to our researchers.



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CoStar has an extensive field research effort that permits physical
inspection of properties in order to find additional inventory, photograph
properties and verify existing information. Some of these researchers use CoStar
trucks equipped with Global Positioning Systems, which use satellites to keep
track of the trucks' location and pinpoint building locations. Each CoStar truck
uses wireless technology to track and transmit field data. A dispatch center in
the Company's Bethesda office manages the entire day-to-day field operations
while using tracking software to monitor each researcher's progress. As of
December 31, 2000, CoStar had 39 trucks used by field researchers in markets
throughout the United States. The site inspection consists of photographing the
building, measuring the building (if necessary), counting parking spaces,
assessing property condition and construction, and gathering tenant information.
Certain researchers canvass properties, interviewing tenants suite by suite.
Other researchers conduct fieldwork in county courthouses and public records
offices. In addition, many of our field researchers are photographers who take
photographs of commercial real estate properties for CoStar to add to the
collection of CoStar's digital images in our database.

License Agreements. We license a small portion of our data from public
record providers, and licensing agreements with these entities provide for our
use of a portion of their national property ownership information in the
enhancement and development of various CoStar services.

Management and Quality Control Systems. In 2000, we enhanced both our
automated and non-automated controls to ensure the integrity of the data
collection process. A large number of automated data quality tests check for
potential errors including occupancy date conflicts, available square footage
greater than building area, typical floor space greater than land area, and
expired leases. Our non-automated quality control procedures include:

- calling our information sources on recently-updated properties to
re-verify information;
- reviewing commercial real estate periodicals for transactions to
cross-check our research;
- performing periodic research audits and field checks to determine if
we correctly canvassed all buildings;
- providing training and retraining to our research professionals to
ensure accurate data compilation; and
- compiling measurable performance metrics for research teams and
managers for feedback on data quality.

Finally, one of the most important and effective quality control measures is
feedback, garnered through regular client surveys taken from the commercial real
estate professionals using our data every day.

PROPRIETARY TECHNOLOGY

In-House Product Development and Information Technology Team. As of
December 31, 2000, CoStar had a staff of approximately 65 product development
and information technology professionals who focused on developing and creating
enhanced products, designing systems to ensure continuous improvement in data
quality, improving the speed of data delivery, and building infrastructure
capable of supporting CoStar's comprehensive database and image library. In
2000, this team completed the development of several new Web products and
enhanced other Web enabled software products that use the Internet for delivery
of content and digital images. On an ongoing basis, these professionals make
modifications to internal applications to implement efficiencies and controls
that ultimately produce quality improvements to the database. They regularly
implement product enhancements, including expanded features and new graphic
design. To increase the speed of data collection, quality control review and
data delivery, the product development and information technology team makes
regular adjustments to internal systems. In addition, this team is responsible
for developing the infrastructure to appropriately support a database with the
size and complexity of CoStar's database.

Computer and Communications Hardware. We maintain Windows NT servers in
support of the database and a national internal frame relay network to allow
remote researchers real-time access to the database. We store full data back-ups
off site.

Software Systems. We use client-server software to manage our internal
data collection. In addition, over the past decade we have developed and refined
our own software systems. This software has four primary functions:

- collection of building-specific data;
- tracking of commercial real estate companies and individuals;
- facilitation of our operations; and
- distribution of data.

PRODUCTS AND SERVICES

Our various current and planned products and services are described in
detail in the following paragraphs.



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CoStar Property(TM). CoStar Property delivers to subscribers a complete
inventory of office and industrial properties and has fostered the development
of our digital leasing marketplace. Subscribers use CoStar Property to research
leasing options, analyze market conditions and competitive property positions,
and produce multimedia client presentations. Members of the broader commercial
real estate community, including non-CoStar subscribers, utilize CoStar Property
extensively to market their properties. Subscribers can query CoStar Property
with any combination of pertinent criteria, combining any of approximately one
hundred data fields from categories such as building size, location, building
characteristics, space availability, ownership, or sales comparables. CoStar
Property's search engine scans through hundreds of millions of square feet of
space in a specified market in seconds to find all the properties meeting the
search criteria. Our subscribers can select from over 50 customizable reports,
presenting space availability, comparable sales, tenant activity, market
statistics, photographs, and floor plans. Users can export and edit reports,
photos, and floor plans to help determine the feasibility of a specific space
for the user's needs. Our clients also use CoStar Property to analyze market
conditions by calculating current vacancy rates, absorption rates, or average
rental rates.

CoStar Tenant(TM). CoStar Tenant is a detailed business-to-business
prospecting and analytical tool for commercial real estate professionals. CoStar
Tenant delivers detailed information profiling the tenants occupying commercial
buildings by tracking tenants throughout the United States. A key service
feature is lease expiration information. Subscribers use CoStar Tenant to gather
information about particular tenants, identify and target the most likely
tenants to lease space, ascertain all tenants in a particular building,
understand trends and the underlying demand for commercial real estate, locate
and target the tenants most likely to need representation for their real estate
requirements, and pinpoint the tenants most likely to buy a particular vendor's
goods and services.

CoStar COMPS(R). CoStar COMPS is a tool for lenders, brokers,
appraisers, investors and corporate real estate executives who need to research
property comparables, identify market trends, expedite the appraisal process,
support property valuations, and prospect customers using the database of
buyers, sellers and brokers. CoStar COMPS provides comprehensive, national
information on comparable sales information in the commercial real estate
industry. This service is provided through a Web-based system and includes
information on sale prices, income and expenses, capitalization rates, loan data
and other key details. Customers may search the proprietary database of
comparable sale information using multiple search parameters, including
location, property type, square footage, price range and number of units.
Customers receive a report of all relevant properties in the database matching
their search criteria, including photographs.

CoStar Exchange(TM). CoStar Exchange is an on-line marketplace for the
buying and selling of commercial properties. As of December 31, 2000, the
database contained approximately 59,000 commercial properties for sale with a
combined asset value in excess of $70.6 billion. In the second quarter of 2000,
we began distributing that information in a broker-centric model through a
secure Web-based browser where sellers and brokers of properties are able to
list extensive information about their properties for sale on the site at no
cost. The site affords an efficient means for these sellers to reach a large
universe of potential buyers. Sellers of investment-grade properties have the
additional option of selecting limited, secure distribution of their properties
in order to address confidentiality requirements. The CoStar Exchange service
integrates the content developed through years of research under the CoStar
Property, CoStar Tenant, CoStar COMPS and other CoStar services.

CoStar Connect(TM). CoStar Connect was released during the first quarter
of 2001 and allows commercial real estate firms to license CoStar's technology
and content to market property listings on their corporate web sites. This
service offers clients access to CoStar's content and digital images in a
service that seamlessly updates and manages the client's online property
information. It enables commercial real estate professionals to enhance the
quality and depth of their listing information by incorporating data fields from
CoStar's national database. CoStar Connect also adds new technology capabilities
to company web sites such as search engines, tailored space queries, space
calculators, sophisticated mapping and 360(Degree) virtual tours.

CoStar Marketplace(TM). CoStar Marketplace provides an on-line means for
the commercial real estate and related business community to direct advertising
to the appropriate decision-makers. We currently deliver this service through
our CoStar services and via our Website. This service benefits our clients by
providing them increased distribution, higher visibility, and a more
cost-effective way to reach their targeted audience for their advertising
materials.

CoStar News(TM). Our Website, our CoStar services, and our e-mail news
dispatches have become an accepted source of reliable industry news. In 2000, we
published over 9,200 news stories. Our newswire feature keeps clients informed
of late-breaking commercial real estate news such as deals signed, acquisitions,
ground breakings and other features.

CoStar Advisory(TM). CoStar Advisory is an electronic report that
provides in-depth analyses of changing trends in vacancy rates, tenant
movements, supply, new construction, absorption rates, and other important
market metrics at the metropolitan,



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market and sub-market levels. CoStar Advisory is currently available for the
Atlanta and Dallas markets. Certain of the analytic tools within CoStar Advisory
are also available within CoStar Property, which allow users to perform
sophisticated analyses of underlying market conditions and trends when making
decisions involving commercial real estate.

Metropolis(TM). As a result of our November 2000 acquisition of First
Image Technologies, Inc., we now offer the Metropolis software system, a single
interface that combines commercial real estate data from multiple information
providers into a comprehensive resource. The metropolis software allows a user
to input a property address and then view detailed information on that property
from multiple information providers, including CoStar products. This technology
offers commercial real estate professionals a simple and convenient solution for
integrating a wealth of third-party information and proprietary data, and is
currently available for the Southern California market.

CoStar ARES 2000(TM). CoStar ARES 2000 is a leading contact management
and business tool for commercial real estate professionals. CoStar ARES 2000
works in conjunction with ACT! 2000 and turns ACT! into a real estate
productivity system by providing commercial real estate elements that are not
provided by ACT!. Users of CoStar ARES 2000 can import data from other CoStar
services into CoStar ARES 2000.

CLIENTS

We draw clients from across the commercial real estate and related
business community. Commercial real estate brokers have traditionally formed the
largest portion of CoStar clients, however, we also provide services to owners,
landlords, vendors, appraisers, investment banks and other parties involved in
commercial real estate. The following chart lists representative clients in
various categories.

<TABLE>
<CAPTION>
BROKERAGE LENDERS, INVESTMENT BANKERS APPRAISERS, ACCOUNTANTS
- --------- --------------------------- ------------------------
<S> <C> <C>

Cushman & Wakefield Bankers Trust Company Arthur Andersen
CB Richard Ellis Credit Suisse First Boston KPMG
Grubb & Ellis GMAC Commercial Mortgage PriceWaterhouseCoopers
Jones Lang LaSalle Merrill Lynch Deloitte and Touche
Insignia/ESG Bank of America
Julien J. Studley Wells Fargo
The Staubach Company Washington Mutual
Carter & Associates World Savings
Colliers First Nationwide
Binswanger
Marcus & Millichap
Equis
Transwestern
</TABLE>

<TABLE>
<CAPTION>
REITs OWNERS AND DEVELOPERS VENDORS
- ----- --------------------- -------
<S> <C> <C>

Boston Properties Hines IntelliSpace
CarrAmerica Trammell Crow Company Kastle Systems
Cornerstone Properties, Inc. TrizecHahn Corporation RCN Corporation
Equity Office Properties Gale & Wentworth
Prentiss Properties Manulife Financial
</TABLE>


<TABLE>
<CAPTION>
INSTITUTIONAL ADVISORS,
GOVERNMENT AGENCIES PROPERTY MANAGERS ASSET MANAGERS
- ------------------- ----------------- -----------------------
<S> <C> <C>

County of Los Angeles Kennedy-Wilson Properties AEW Capital Management
Fairfax County Dev. Authority Leggat McCall Properties Jones Lang LaSalle
Montgomery County Dept. Lincoln Property Company Legg Mason
of Public Works PMRealty Group LendLease Real
NYC Economic Development U.S. Equities Realty Estate Investments
U.S. General Services Administration USAA Real Estate
Company
</TABLE>



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As of December 31, 2000, no single client accounted for more than 5% of
our revenues. We do not have a significant backlog and do not believe that
backlog is a meaningful indicator of our future results.

SALES AND MARKETING

As of December 31, 2000, we had over 170 sales, marketing and customer
support employees, with the majority of our direct sales force located in field
sales offices. Our sales teams are primarily geographically focused and located
in over 20 field sales offices in our largest U.S. markets. Our offices
typically serve as the platform for our in-market sales, client service, and
field research operations for their respective regions. The sales force is
responsible for selling to new prospects, renewing existing client contracts,
and identifying cross-selling opportunities.

Our field sales people primarily focus in Information Solutions or
eMedia. The Information Solutions sales personnel focus on selling information
services such as CoStar Exchange, CoStar Property, CoStar Tenant, CoStar COMPS
and Metropolis. Many of these salespeople have significant commercial real
estate experience, allowing them to take a consultative sales approach. Within
this group we have a major accounts team, which focuses solely on the Company's
largest clients. The eMedia sales personnel sell CoStar Connect, on-line
advertising on our website and advertising space in the CoStar Property and
CoStar Tenant regional newswires. Many of these sales people have an advertising
sales background or experience in commercial real estate. Our sales strategy is
to aggressively attract new clients, while providing ongoing incentives for
existing clients to subscribe to more of our newer services.

We seek to make our services essential to our clients' businesses. To
encourage clients to use our services regularly, we generally charge fixed
monthly amounts rather than fees based on actual system usage. Our clients'
monthly charges are based on the number of sites, organization size, the
company's business focus, and the number of services to which a client
subscribes.

Our customer service and support staff is charged with installing and
training our client base as well as ensuring high client satisfaction by
providing on-going support. The customer service and support staff handles all
facets of customer relations including billing questions, research questions and
routine technical issues, and has primary, front-line responsibility for
customer care.

Our primary marketing methods include: service demonstrations, direct
marketing, trade show and industry events, print advertising, and client
referrals. Direct marketing is the most cost effective means for us to find
prospective clients. Our direct marketing efforts include direct mail, e-mail,
and telemarketing, and make extensive use of our unique, proprietary database.
Once we have identified a prospective client, we have found the most effective
sales method is a service demonstration. Our advertising includes traditional
print advertising, Internet banners and private network banners. We use various
forms of advertising for brand identity, message reinforcement, and potential
client identification. We also attend industry tradeshows and seminars to
reinforce our relationships with our core user groups.

COMPETITION

The market for information systems and services generally is competitive
and rapidly changing. The market for Internet services and providers is
intensely competitive and rapidly changing. In the commercial real estate
industry, the principal competitive factors for commercial real estate
information are:

- quality and depth of the underlying databases;
- price;
- ease of use, flexibility, and functionality of the software;
- timeliness of the data;
- breadth of geographic coverage and services offered;
- perception that the service offered is the industry standard;
- proprietary nature of methodologies, databases and technical
resources;
- effectiveness of marketing and sales efforts;
- client service and support;
- vendor reputation;
- brand loyalty among customers; and
- capital resources.

We compete directly and indirectly for customers with the following
categories of companies:


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- online services or Web sites targeted to commercial real estate
brokers, buyers and sellers of commercial real estate properties,
insurance companies, mortgage brokers and lenders, such as
Propertyfirst.com, LoopNet, Inc. and RealtyIQ.com;
- publishers and distributors of information services, including
regional providers and smaller local providers, and national print
publications such as Black's Guide;
- consortiums of real estate companies formed to explore opportunities
in technology;
- locally based real estate boards or associations sponsoring property
listing services;
- in-house research departments operated by some commercial real estate
brokers; and
- public record providers.

As the digital real estate marketplace develops, additional competitors
(including companies which could have greater access to data, financial, product
development, technical, and marketing resources than we do) may enter the market
and competition may intensify. While we believe that we have successfully
differentiated ourselves from existing or potential competitors, competition
could materially harm our business.

PROPRIETARY RIGHTS

To protect our proprietary rights in our methodologies, database,
software, trademarks and other intellectual property, we depend upon a
combination of:

- trade secret, copyright, trademark and other laws;
- nondisclosure, noncompetetion and other contractual provisions with
employees and consultants;
- license agreements with customers;
- patent protection; and
- technical measures.

We seek to protect our software's source code and our database as trade
secrets and under copyright law. Although copyright registration is not a
prerequisite for copyright protection, we have filed for copyright registration
for our databases, software and other materials. Under current law, the
arrangement and selection of data may be protected, but the actual data itself
may not be. Moreover, other people are free to try to independently create
databases that perform the same function as ours. We believe, however, that it
would be very time-consuming and costly to create a competing database. We
license our database, software and services under license agreements that grant
our clients non-exclusive, non-transferable licenses. These agreements restrict
the disclosure and use of our content, images and software. In addition, the
license agreements prohibit the unauthorized reproduction or transfer of the
information and software we license.

We also attempt to protect the secrecy of our proprietary database, our
trade secrets and our proprietary information through confidentiality and
noncompetition agreements with our employees and consultants. Our services also
include technical measures to discourage and detect unauthorized copying.

We have filed trademark applications to register trademarks for a
variety of names for the CoStar products and other marks, and have obtained
registered trademarks for "CoStar" and "COMPS." In addition, we have filed a
patent application covering certain of our methodologies and software.

On September 30, 1999, CoStar filed suit against LoopNet, Inc. in the
U.S. District Court for the District of Maryland. The complaint asserts, among
other things, that LoopNet infringed CoStar's copyrights by unlawfully
displaying and distributing CoStar's copyrighted photographs on LoopNet's web
site. On March 14, 2000, the judge issued a preliminary injunction ordering
LoopNet, Inc. to remove CoStar photographs from the LoopNet website once CoStar
notifies it of any possible infringement. The injunction also requires that
LoopNet notify users whenever it removes CoStar photographs submitted for
posting on LoopNet's Web site. It also mandates that LoopNet require certain
repeat offenders to produce evidence of copyright ownership before posting any
photograph to the LoopNet Web site. In its suit, CoStar is seeking monetary
damages for past infringements, attorney's fees and a permanent injunction
against LoopNet.

EMPLOYEES

As of December 31, 2000, we employed 974 employees. None of our
employees is represented by a labor union. We have experienced no work
stoppages. We believe that our employee relations are excellent.



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ITEM 2 PROPERTIES

Our corporate headquarters in Bethesda, Maryland occupies approximately
60,000 square feet under a lease that expires on March 14, 2010. We believe that
our Bethesda, Maryland facility will be adequate to meet our requirements for
our headquarters for the foreseeable future.

In addition to our Bethesda, Maryland facility, our research operations
are headquartered in San Diego, California and Mason, Ohio. Additionally, we
lease office space in a variety of other locations, which are generally field
sales offices. These locations include, without limitation, the following: New
York; Los Angeles; Chicago; San Francisco; Boston; Newport Beach; Philadelphia;
Houston; Atlanta; Phoenix; Southfield, Michigan; Cranford, New Jersey;
Charlotte, North Carolina; Ft. Lauderdale, Florida; Seattle; Denver; Austin;
Dallas; Sacramento, California; and Tampa, Florida.

ITEM 3 LEGAL PROCEEDINGS

We are currently and from time to time are involved in litigation
incidental to the conduct of our business. We are not a party to any lawsuit or
proceeding that, in the opinion of our management, is likely to have a material
adverse effect on our financial position or results of operations.

ITEM 4 SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

We did not submit any matters to a vote of our security holders during
the quarter ended December 31, 2000.



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ITEM 5 MARKET FOR THE REGISTRANT'S COMMON STOCK AND RELATED STOCKHOLDER
MATTERS

Price Range of Common Stock. Our common stock is traded on the Nasdaq
Stock Market under the symbol "CSGP." The following table sets forth, for the
periods indicated, the high and low sale price per share of our common stock on
the Nasdaq Stock Market.

<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31, 1999 HIGH LOW
- ---------------------------- ---- ---
<S> <C> <C>

First Quarter..........................................$29 1/4 $12 5/8
Second Quarter.........................................$48 5/8 $28 1/2
Third Quarter..........................................$48 $22 3/16
Fourth Quarter.........................................$35 7/8 $14 5/16

YEAR ENDED DECEMBER 31, 2000
- ----------------------------

First Quarter..........................................$53 11/16 $30 3/8
Second Quarter.........................................$39 9/16 $20 3/8
Third Quarter..........................................$40 3/4 $24 1/2
Fourth Quarter.........................................$36 11/16 $18 17/64
</TABLE>

As of March 15, 2001, there were approximately 147 holders of record of
our common stock. On March 15, 2001, the last sale price reported on the Nasdaq
Stock Market for our common stock was $16 13/16 per share.

Dividend Policy. We have never declared or paid any dividends on our
common stock. We do not plan to do so in the foreseeable future.

Recent Issues of Unregistered Securities. In connection with the
acquisition of ARES, the Company issued to the two members of ARES, an aggregate
of 2,140 shares of our common stock on February 28, 2000 and an aggregate of
2,196 shares of common stock on October 10, 2000. Such shares comprised part of
the consideration for the acquisition for ARES and were issued in reliance on
the exemption from registration under Section 4(2) of the Securities Act of
1933, as amended (the "Securities Act"). In connection with the acquisition of
First Image Technologies, Inc., we issued to the sole stockholder of First Image
Technologies 9,424 shares of our common stock on November 9, 2000. These shares
comprised part of the consideration for the acquisition for First Image
Technologies and were issued in reliance on the exemption from registration
under Section 4(2) of the Securities Act. On February 23, 2000, we issued to
Michael Klein, our Chairman, 35,294 shares of our common stock in connection
with the net exercise of a warrant held by Mr. Klein. The shares were issued in
reliance on the exemption from registration under Section 4(2) of the Securities
Act.



11
12


ITEM 6 SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA

SELECTED CONSOLIDATED FINANCIAL AND OPERATING DATA
(IN THOUSANDS, EXCEPT PER SHARE DATA AND OTHER OPERATING DATA)

The following table provides selected financial data for the five years
ended December 31, 2000. The Statement of Operations Data we show below for 1998
through 2000 and the Balance Sheet Data for 1999 and 2000 is derived from
audited financial statements that we include later in this report. The Statement
of Operations Data for 1996 and 1997 and the Balance Sheet Data for 1996 through
1998 we show below is derived from audited financial statements for those years,
which do not appear in this report. As explained in the Notes to the
Consolidated Financial Statements that appear later in this report, the
financial data for 1996 through 2000 is derived from the audited financial
statements of us and of our predecessor companies for those years.

<TABLE>
<CAPTION>
YEARS ENDED DECEMBER 31,
----------------------------------------------------------------
1996 1997 1998 1999 2000
-------- -------- -------- -------- --------
<S> <C> <C> <C> <C> <C>

STATEMENT OF OPERATIONS DATA:
Revenues ........................... $ 4,336 $ 7,900 $ 13,900 $ 30,234 $ 58,502
Cost of revenues ................... 2,188 3,413 4,562 13,244 30,202
-------- -------- -------- -------- --------
Gross margin ....................... 2,148 4,487 9,338 16,990 28,300
Operating expenses ................. 4,829 7,786 12,864 32,373 83,335
-------- -------- -------- -------- --------
Loss from operations ............... (2,681) (3,299) (3,526) (15,383) (55,035)
Other income, net .................. 49 33 341 3,106 3,335
Income tax benefit ................. 0 0 0 0 2,045
-------- -------- -------- -------- --------
Net loss ........................... $ (2,632) $ (3,266) $ (3,185) $(12,277) $(49,655)
======== ======== ======== ======== ========
Net loss per share - basic and
diluted ......................... $ (0.60) $ (0.57) $ (0.44) $ (1.05) $ (3.28)
======== ======== ======== ======== ========
Weighted average shares
outstanding ..................... 4,388 5,722 7,213 11,727 15,137
======== ======== ======== ======== ========
</TABLE>


<TABLE>
<CAPTION>
AS OF DECEMBER 31,
------------------------------------------------------------
1996 1997 1998 1999 2000
------- ------- ------- ------- -------
<S> <C> <C> <C> <C> <C>

BALANCE SHEET DATA:
Cash and cash equivalents ....... $ 3,326 $ 1,069 $19,667 $94,074 $47,101
Working capital ................. 2,248 (1,547) 16,900 89,153 35,601
Total assets .................... 7,670 6,581 27,541 136,905 145,871
Total liabilities ............... 2,000 3,664 4,338 17,208 19,497
Stockholders' equity ............ 5,670 2,917 23,203 119,697 126,374
</TABLE>


<TABLE>
<CAPTION>
AS OF DECEMBER 31,
------------------------------------------------------
1996 1997 1998 1999 2000
------ ------ ------- ------- -------
<S> <C> <C> <C> <C> <C>

OTHER OPERATING DATA:
Markets Covered by Database ..... 9 14 19 41 51
Number of Subscription Clients... 542 1,123 1,731 3,612 5,407
Billions of Square Feet in
Database ..................... 3.3 6.5 9.1 15.6 21.7
Buildings in Database ........... 43,520 112,335 175,471 334,917 864,920
Images in Database .............. 47,308 90,545 178,827 349,526 968,316
</TABLE>



12
13



ITEM 7 MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION
AND RESULTS OF OPERATIONS

The following Management's Discussion and Analysis of Financial
Condition and Results of Operations contains "forward-looking statements", which
involve many risks and uncertainties that could cause actual results to differ
materially from these statements. Factors that could cause or contribute to such
differences include, but are not limited to, successful adoption of our
products, competition, general economic conditions, changes in the commercial
real estate industry, managerial execution, customer retention, development of
our sales force, employee retention, and our ability to adapt to technological
changes. More information about potential factors that could cause actual
results to differ materially include, but are not limited to, those stated below
under the heading "Risk Factors". All forward-looking statements are based on
information available to us on the date of this filing, and we assume no
obligation to update such statements. The following discussion should be read in
conjunction with our filings with the Securities and Exchange Commission and the
consolidated financial statements included herein.

OVERVIEW

CoStar is the leading provider of information services to the U.S.
commercial real estate industry. We are creating a digital marketplace where the
members of the commercial real estate and related business community can
continuously interact and facilitate transactions by efficiently exchanging
accurate and standardized information. Our wide array of digital service
offerings includes a leasing marketplace, a selling marketplace, comparable
sales information, decision support, tenant information, property marketing,
data hosting for clients' web sites, contact management, property data
integration, and industry news. Substantially all of our current services are
digitally delivered over the Internet.

We completed our initial public offering in July 1998 and received net
proceeds of approximately $22.7 million. We primarily used those net proceeds to
fund the geographic and service expansion of our business, including three
strategic acquisitions, and to expand our sales and marketing organization. In
May 1999, we completed a follow-on public offering and received net proceeds of
approximately $97.4 million. We used a portion of those net proceeds to fund the
acquisition of COMPS.COM, Inc. ("Comps") and we expect to use the remainder of
the proceeds primarily for development and distribution of new services,
expansion of all existing services across our current markets, geographic
expansion in the U.S. and international markets, strategic acquisitions and
working capital and general corporate purposes.

From 1994 through 2000, we expanded the geographical coverage of our
existing services and developed new services. In addition to internal growth,
this expansion included the acquisitions of Chicago ReSource, Inc. in Chicago in
1996 and New Market Systems, Inc. in San Francisco in 1997. In August 1998, we
expanded into the Houston region through the acquisition of Houston-based real
estate information provider C Data Services, Inc. In January 1999, we expanded
further into the Midwest and Florida by acquiring LeaseTrend, and into Atlanta
and Dallas/Fort Worth by acquiring Jamison Research, Inc. In September 1999, we
acquired ARES, a Los Angeles based developer and distributor of ARES for ACT!.
In February 2000, we acquired Comps. In November 2000, we acquired First Image
Technologies. The more recent acquisitions are discussed later in this section.

We consider regions that have had ongoing operations for at least 18
months to be established, and we currently generate positive cash flow from our
operations in established regions. As of December 31, 2000, the following
regions are those that have been in operation for more than 18 months and that
we consider to be established: Washington, New York, Los Angeles, Chicago, San
Francisco, Philadelphia, Boston, Houston, San Diego, Phoenix, Denver and
Florida. These regions provide us with substantial cash flow, which we reinvest
into the business. Emerging regions are those in the process of becoming
established, and require substantial investment until such time that the
revenue for the region exceeds the operating costs for the region. Since our
inception, the development of our business has required substantial investments
for the expansion of services and the establishment of operating regions, which
has resulted in substantial net losses on an overall basis.

The incremental cost of introducing new services in an established
region in the future may reduce the profitability of a region or cause it to
incur losses. We expect continued development and distribution of new services
and expansion of existing services across current markets and we may have
geographic expansion in the United States and international markets in the
future. Therefore, while we expect operations in existing established regions to
remain profitable and provide substantial funding, we expect our overall
expansion plans to generate losses and negative cash flow from operations during
the next year.



13
14

Although our services continue to expand, our CoStar Property, CoStar
Tenant and CoStar COMPS services currently generate the largest portion of our
revenue. The CoStar Property, CoStar Tenant and CoStar COMPS contracts range
from terms of one to three years and generally renew automatically. Upon
renewal, many of the contract rates increase automatically in accordance with
contract provisions or as a result of renegotiations. To encourage clients to
use our services regularly, we generally charge fixed amounts rather than fees
based on actual system usage. We charge our clients based on the number of
sites, organization size, the company's business focus, and the number of
services to which a client subscribes.

Our contract renewal rate generally exceeds 90% on an annual basis.
However, recently many telecommunications companies (which represented
approximately 6% of our revenues at their peak) have discontinued or curtailed
their operations. This has resulted in an increased number of cancellations of
our services by these telecommunications companies. These cancellations,
together with other factors, could result in a lower renewal rate for our
services over the next twelve months.

Our clients pay contract fees on an annual, quarterly, or monthly basis.
We recognize this revenue over the life of the contract on a straight-line basis
beginning with the installation or renewal date. Annual and quarterly advance
payments result in deferred revenue, substantially reducing the working capital
requirements generated by the growth in our accounts receivable.

As explained in the Notes to the Consolidated Financial Statements that
appear later in this report, the financial data for 1998 through 2000 is derived
from the audited financial statements of us and of our predecessor companies for
those years.

CONSOLIDATED RESULTS OF OPERATIONS

The following table provides our selected consolidated results of
operations (in thousands of dollars and as a percentage of total revenue) for
the indicated periods:

<TABLE>
<CAPTION>
YEARS ENDED DECEMBER 31,
----------------------------------------------------
1998 1999 2000
-------------- -------------- -----------------
<S> <C> <C> <C> <C> <C> <C>
Revenues................................. $13,900 100% $ 30,234 100% $ 58,502 100%
Cost of revenues......................... 4,562 33 13,244 44 30,202 52
------- --- ------- --- -------- ---
Gross margin............................. 9,338 67 16,990 56 28,300 48
Operating expenses
Selling and marketing............... 6,935 50 17,965 59 37,644 64
Software development................ 704 5 1,108 4 3,865 7
General and administrative.......... 4,920 35 11,054 37 27,086 46
Purchase amortization............... 305 2 2,246 7 8,928 15
Acquired in-process development..... 0 0 0 0 5,812 10
------- --- ------- --- -------- ---
Total operating expenses....... 12,864 92 32,373 107 83,335 142
------- --- ------- --- -------- ---
Loss from operations..................... (3,526) (25) (15,383) (51) (55,035) (94)
Other income, net........................ 341 2 3,106 10 3,335 6
Income tax benefit....................... 0 0 0 0 2,045 3
------- --- ------- --- -------- ---
Net loss................................. $(3,185) (23)% $(12,277) (41)% $(49,655) (85)%
======= === ======= === ======== ===
</TABLE>



14
15


COMPARISON OF YEAR ENDED DECEMBER 31, 2000 AND YEAR ENDED DECEMBER 31, 1999

Revenues. Revenues grew 93% from $30.2 million in 1999 to $58.5 million
in 2000. This increase resulted principally from growth in our client base for
the regions we served, expansion of our services in existing regions and the
acquisition of Comps. Revenues from regions we considered established as of
December 31, 2000 grew from approximately $22.5 million in 1999 to approximately
$31.6 million in 2000, an increase of 40%. Comps contributed $15.5 million to
revenues for 2000. Comps revenue grew approximately 30% in 2000 after the
acquisition.

Gross Margin. Gross margin increased from $17.0 million in 1999 to $28.3
million in 2000. While gross margin increased in total, as a percentage of
revenues it decreased from 56% to 48%. The increase in gross margin amounts
resulted principally from significant revenue growth from established regions
and the acquisition of Comps. The decline in gross margin percentages resulted
from lower gross margin percentages in Comps products and an increase in
purchase price amortization from the LeaseTrend, Jamison, ARES, Comps and First
Image Technologies acquisitions. This amortization increased from $777,000 in
1999 to $4.8 million in 2000.

Selling and Marketing Expenses. Selling and marketing expenses increased
from $18.0 million in 1999 to $37.6 million in 2000 and increased as a
percentage of revenues from 59% in 1999 to 64% in 2000. Selling and marketing
expenses increased as a result of continued expansion of the sales organization
and marketing efforts required for growth, particularly in emerging and acquired
regions. In addition, these expenses increased as a result of the non-recurring
marketing costs surrounding the launch of our CoStar Exchange product, which
began to decline after the second quarter of 2000, and ended during the fourth
quarter of 2000.

Software Development Expenses. Software development expenses increased
from $1.1 million in 1999 to $3.9 million in 2000 and increased as a
percentage of revenues from 4% in 1999 to 7% in 2000. The increase in expenses
reflects development costs for the increased number of products we now support
including CoStar COMPS and Costar Exchange.

General and Administrative Expenses. General and administrative expenses
increased from $11.1 million in 1999 to $27.1 million in 2000 and increased as a
percentage of revenues from 37% in 1999 to 46% in 2000. General and
administrative expenses increased due to the hiring of new employees to support
our expanded operations and client base and also the increase in employees due
to the acquisition of Comps. During 2000, we recruited and hired four senior
level executives.

Purchase Amortization. Purchase amortization increased from $2.2 million
in 1999 to $8.9 million in 2000. Purchase amortization increased primarily due
to the acquisition of Comps.

Acquired In-Process Development. Acquired in-process development costs
of $5.8 million in 2000 consist of in-process development costs written off as
part of the Comps acquisition.

Other Income, Net. Interest and other income increased from $3.1 million
in 1999 to $3.3 million in 2000. This increase was primarily a result of a full
year of interest earned on the proceeds from the follow-on public offering.

Income Tax Benefit. An income tax benefit of $2.0 million in 2000 is a
result of the reversal of the deferred tax liability in connection with the
amortization of identified intangible assets established during recent
acquisitions.



15
16


COMPARISON OF YEAR ENDED DECEMBER 31, 1999 AND YEAR ENDED DECEMBER 31, 1998

Revenues. Revenues grew 118% from $13.9 million in 1998 to $30.2 million
in 1999. This increase resulted principally from growth in our client base in
all regions we served, expansion into new regions, and expansion of our services
in existing regions. Revenues from regions we considered established as of
December 31, 1999 grew from $13.1 million in 1998 to $19.8 million in 1999, an
increase of 51%. During 1999, we expanded into Seattle and acquired and
converted over twenty regions, including Atlanta, Dallas, Denver, Florida and
the Midwest.

Gross Margin. Gross margin increased from $9.3 million in 1998 to $17.0
million in 1999. While gross margin increased in total, as a percentage of
revenues it decreased from 67% to 56%. The increase in gross margin amounts
resulted principally from significant revenue growth from established regions.
The decline in gross margin percentages resulted from costs related to the
expansion of services in established regions, an increase in the number of
emerging regions and lower gross margins in the newly acquired regions.
Furthermore, our cost of revenues for the year ended December 31, 1999 includes
purchase price amortization from the LeaseTrend, Jamison and ARES acquisitions
of $777,000.

Selling and Marketing Expenses. Selling and marketing expenses increased
from $6.9 million in 1998 to $18.0 million in 1999 and increased as a percentage
of revenues from 50% in 1998 to 59% in 1999. Selling and marketing expenses
increased as a result of the cost of the acquired sales organizations and
continued expansion of the sales organization and marketing efforts required for
growth, particularly in emerging and acquired regions, including Phoenix,
Houston, Denver, Florida and the Midwest.

Software Development Expenses. Software development expenses increased
from $704,000 in 1998 to $1.1 million in 1999, but decreased as a percentage of
revenues from 5% in 1998 to 4% in 1999. The increase in expenses reflects
development costs for the expansion of services for emerging and established
regions and new service initiatives.

General and Administrative Expenses. General and administrative expenses
increased from $4.9 million in 1998 to $11.1 million in 1999 and increased as a
percentage of revenues from 35% in 1998 to 37% in 1999. General and
administrative expenses increased due to the hiring of new employees to support
our expanded operations and client base, as well as the increased administrative
costs in a public company.

Purchase Amortization. Purchase amortization increased from $305,000 in
1998 to $2.2 million in 1999. Purchase amortization increased primarily due to
the acquisition of Jamison, LeaseTrend and ARES.

Other Income, Net. Other income increased from $341,000 in 1998 to $3.1
million in 1999. This increase resulted from an increase in interest income due
to our higher average cash balances in 1999, reflecting the net proceeds from
our follow-on public offering in May 1999.



16
17


CONSOLIDATED QUARTERLY RESULTS OF OPERATIONS

The following tables summarize our consolidated results of operations
on a quarterly basis for the indicated periods:

<TABLE>
<CAPTION>
1999 2000
-------------------------------------- ---------------------------------------
MAR. 31 JUNE 30 SEPT. 30 DEC. 31 MAR. 31 JUNE 30 SEPT. 30 DEC. 31
------- ------- -------- ------- -------- ------- -------- -------
(IN THOUSANDS)
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Revenues................................. $ 6,127 $ 7,178 $ 8,021 $ 8,908 $ 11,372 $ 14,572 $ 15,717 $ 16,841
Cost of revenues......................... 2,594 3,068 3,616 3,965 5,977 7,730 8,356 8,139
------ ------- ------- ------- -------- -------- -------- --------
Gross margin............................. 3,533 4,110 4,405 4,943 5,395 6,842 7,361 8,702
Operating expenses....................... 5,759 7,352 8,898 10,364 22,090 21,571 20,261 19,413
------ ------- ------- ------- -------- -------- -------- --------
Loss from operations..................... (2,226) (3,242) (4,493) (5,421) (16,695) (14,729) (12,900) (10,711)
Other income (expense), net.............. 62 616 1,234 1,193 1,026 751 807 751
Income tax benefit....................... 0 0 0 0 565 845 523 112
------ ------- ------- ------- -------- -------- -------- --------
Net loss................................. $(2,164) $(2,626) $(3,259) $(4,228) $(15,104) $(13,133) $(11,570) $ (9,848)
====== ======= ======= ======= ======== ======== ======== ========
</TABLE>


<TABLE>
<CAPTION>
1999 2000
-------------------------------------- --------------------------------------
MAR. 31 JUNE 30 SEPT. 30 DEC. 31 MAR. 31 JUNE 30 SEPT. 30 DEC. 31
------- ------- -------- ------- ------- ------- -------- -------
(AS A PERCENTAGE OF TOTAL REVENUE)
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Revenues................................. 100% 100% 100% 100% 100% 100% 100% 100%
Cost of revenues......................... 42 43 45 45 53 53 53 48
--- --- --- --- ---- --- --- ---
Gross margin............................. 58 57 55 55 47 47 47 52
Operating expenses....................... 94 102 111 116 194 148 129 115
--- --- --- --- ---- --- --- ---
Loss from operations..................... (36) (45) (56) (61) (147) (101) (82) (64)
Other income (expense), net.............. 1 9 15 13 9 5 5 4
Income tax benefit....................... 0 0 0 0 5 6 3 1
--- --- --- --- ---- --- --- ---
Net loss................................. (35)% (36)% (41)% (48)% (133)% (90)% (74)% (58)%
=== === === === ==== === === ===
</TABLE>


ACQUISITIONS

LeaseTrend. On January 8, 1999, we acquired all of the outstanding
capital stock of LeaseTrend, Inc., a Cincinnati based provider of commercial
real estate information, for approximately $4.5 million in cash and 566,671
shares of our common stock. The transaction was accounted for as a purchase and
the consideration was valued for accounting purposes at approximately $9.2
million including acquisition expenses.

Jamison Research. On January 22, 1999, we acquired all of the
outstanding capital stock of Jamison Research, Inc., an Atlanta based provider
of commercial real estate information, for approximately $5.3 million in cash
and 446,637 shares of our common stock. The transaction was accounted for as a
purchase and the consideration was valued for accounting purposes at
approximately $10.3 million including acquisition expenses.

ARES Development Group, LLC. On September 15, 1999, we acquired all of
the membership interests of ARES Development Group, LLC, Los Angeles based
developers and distributors of ARES for ACT!, for $250,000 in cash and 33,208
shares of our common stock. The transaction was accounted for as a purchase and
the initial consideration was valued for accounting purposes at approximately
$1,265,000 including acquisition expenses. In addition, the acquisition
agreement provided for $1,000,000 of additional consideration (in a combination
of cash and stock) to be paid by CoStar upon the achievement of certain
operating goals by the members of ARES. In February 2000, we issued 2,140 shares
of our common stock and paid $437,500 in cash to the members of ARES for the
achievement of the first of the operating goals by the members of ARES. In
October 2000, we issued an additional 2,196 shares of our common stock and paid
an additional $437,500 in cash to the members of ARES for the achievement of the
second (and final) of the operating goals by the members of ARES.



17
18


Comps. On February 10, 2000, we acquired all of the outstanding
capital stock of Comps, a San Diego based provider of commercial real estate
information, for $49,015,905 in cash and 2,259,034 shares of the Company's
common stock. The acquisition has been accounted for using purchase accounting
and has been valued at approximately $101,379,000 for accounting purposes. The
purchase price was allocated primarily to cash, acquired database technology and
other intangibles, which will be amortized over a period of 2 to 10 years. In
connection with the purchase of Comps, $5,812,000 of the purchase price was
allocated to purchased in-process development, and expensed upon acquisition
because the technological feasibility of products under development had not been
established and no future alternative use existed. The acquired in-process
development was analyzed through an independent third-party valuation using the
expected cash flow approach.

Comps reported a cash and short term investment balance of approximately
$49.5 million at September 30, 1999, which resulted from its initial public
offering in May 1999. Comps also reported long term debt of approximately $3.8
million at September 30, 1999. Although Comps was experiencing operating losses
and negative cash flow from operations, the remaining cash and short term
investments at the closing date significantly offset the overall cash
consideration for the purchase of Comps by CoStar. The cash portion of the
purchase price was obtained by CoStar from the proceeds from the sale of its
common stock in a follow-on public offering in May 1999. We have made
significant investments to integrate Comps into our organization, including
costs to:

- upgrade computer systems;
- establish network connections;
- convert database structures;
- train personnel; and
- migrate Comps clients to our services.

During the fourth quarter of 2000, Comps reached the cash flow breakeven
point as a result of the steps we have taken to eliminate operating losses and
negative cash flow, and we expect to have positive cash flow in 2001 from Comps.
CoStar will continue to experience significant charges to operations for the
amortization of intangible assets resulting from the acquisition.

First Image Technologies. On November 9, 2000, CoStar completed the
acquisition of First Image Technologies, Inc. The primary asset of First Image
is the Metropolis software system, a single interface that combines commercial
real estate data from multiple information providers into a comprehensive
resource. We acquired all of the outstanding capital stock of First Image
Technologies, Inc. for approximately $665,000 in cash and 9,424 shares of our
common stock. The transaction was accounted for as a purchase and the initial
consideration was valued for accounting purposes at approximately $950,000
including acquisition expenses. In addition, the acquisition agreement provides
for $950,000 of additional consideration (in a combination of cash and stock) to
be paid by CoStar upon the achievement of certain operating goals by the sole
stockholder of First Image.

LIQUIDITY AND CAPITAL RESOURCES

Our cash and cash equivalents balance was $47,101,242 at December 31,
2000, a decrease of $46,972,885 from $94,074,127 at December 31, 1999. This
decrease was due principally to the cash used for the acquisition of Comps in
February of 2000, cash used in operating activities, $11,493,570 in purchases of
property and equipment, $1,349,236 in purchased building photography, and debt
repayments of $4,531,000. During the year ended December 31, 2000, we financed
our operations and growth through cash flow from the established regions and the
proceeds of the follow-on offering. Net cash used in operations for the year
ended December 31, 2000 was $26,846,265 compared to net cash used in operating
activities of $7,476,662 for the year ended December 31, 1999. This was a direct
result of expenditures required for the expansion in emerging and acquired
regions, the development and launch of new services, and the acquisition of
Comps. We continue to experience overall operating losses as a result of our
recent expansion into emerging and acquired regions, while established regions
continue to generate positive cash flow from operations.

Net cash used in investing activities amounted to $17,697,603 for the
year ended December 31, 2000, including $3,071,000 (net of acquired cash) for
the acquisition of Comps and First Image Technologies. Additional investing
activities included capitalized product development costs, purchased building
photography, and purchased property and equipment, consisting principally of
leasehold improvements, computers, and office equipment. As a result of our
expansion, we have entered into numerous operating leases for office space
throughout the country, including CoStar's headquarters, and have commitments
for rent payments ranging from approximately $2,688,000 to $3,989,000 annually
over the next ten years. We currently have no material commitments for capital
expenditures.



18
19


To date, we have grown in part by acquiring other companies, and we may
continue to make acquisitions. Our acquisitions may vary in size and could be
material to our current operations. We expect to use cash, stock, or other means
of funding to make these acquisitions.

During the year ended December 31, 2000, we experienced significant
losses and negative operating cash flow as a result of the expansion in emerging
regions, expansion of services in established regions, costs for the
introduction of new products and the acquisition of Comps. Some of these costs
are non-recurring, and the remainder are generally fixed operating costs, which
are not expected to directly increase as a result of growth in revenue. As the
Company emerges from a period of rapid product and geographical expansion, in
2001 we expect continued sequential quarterly growth in revenue and a fixed or
declining overall operating cost structure. As a result, we expect reductions in
the level of operating losses and negative operating cash flow during 2001.

Based on current plans, we believe that our available cash combined with
positive cash flow from our established regions should be sufficient to fund our
operations for at least the next two years.

Through June 30, 1998, we operated as either a Subchapter S corporation
or a limited partnership, and we were not subject to corporate income taxes.
After June 30, 1998, we became a taxable entity. Although we have experienced
losses to date, future profits, to the extent not offset by the benefits of loss
carryforwards, would result in income tax liabilities. In addition, we have
recorded a valuation allowance for the portion of the deferred tax assets
related to tax loss carryfowards. We do not expect to benefit substantially from
tax loss carryforwards generated prior to July 1998.

We do not believe the impact of inflation has significantly affected our
operations.

CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS

We have made forward-looking statements in this Report that are subject
to risks and uncertainties. Forward-looking statements include information that
is not purely historic fact, including statements concerning the financial
outlook for 2001 and estimates for the future, our possible or assumed future
results of operations generally, new products and services that we expect to
release, and other statements and information regarding assumptions about our
earnings per share, capital and other expenditures, financing plans, cash flow,
capital structure, pending legal proceedings and claims, future economic
performance, operating income, management's plans, goals and objectives for
future operations and growth and markets for stock. The sections of this Report,
which contain forward-looking statements, include "Business", "Properties",
"Legal Proceedings" and "Management's Discussion and Analysis of Financial
Condition and Results of Operations."

Our forward-looking statements are also identified by words such as
"believes," "expects," "anticipates," "intends," "estimates" or similar
expressions. You should understand that these forward-looking statements are
necessarily estimates reflecting our judgment, not guarantees of future
performance. They are subject to a number of assumptions, risks and
uncertainties that could cause actual results to differ materially from those
expressed or implied in the forward-looking statements. You should understand
that the following important factors, in addition to those discussed in "Risk
Factors", could affect our future results and could cause those results or other
outcomes to differ materially from those expressed or implied in our
forward-looking statements: competition; technological innovation by
competitors; general economic conditions; events that affect commercial real
estate; customer retention; business combinations and strategic alliances by
other industry participants; managerial execution; development of our sales
force; growth in commerce conducted over the Internet; changes in relationships
with real estate brokers and other strategic partners; and legal and regulatory
issues.

Accordingly, you should not place undue reliance on forward-looking
statements, which speak only as of the date of this Report. All subsequent
written and oral forward-looking statements attributable to us or any person
acting on our behalf are expressly qualified in their entirety by the cautionary
statements contained or referred to in this section. We do not undertake any
obligation to release publicly any revisions to these forward-looking statements
to reflect events or circumstances after the date of this Report or to reflect
the occurrence of unanticipated events.

RISK FACTORS

Our future profitability is uncertain due to our continuing operating
losses. We have never recorded an overall operating profit because the
investment required for geographic expansion and new services has exceeded the
profits generated in our



19
20


established markets. We intend to continue investing in expanding our operations
and new services and therefore expect to sustain substantial losses during
the next twelve months. Our ability to earn a profit will largely depend on our
ability to manage our growth, and to generate profits from services that exceed
our investment in geographic expansion and new services. In addition, our
ability to earn a profit or to increase revenues could be affected by the
factors set forth below. We may not be able to generate revenues sufficient to
earn a profit, to maintain profits on a quarterly or annual basis, or to sustain
or increase our future revenue growth.

Our operating results may fluctuate significantly. Our revenues and
operating results may fluctuate with general economic conditions and also for
many other reasons, such as: competition; our investments in geographic
expansion; the timing of new service introductions and enhancements; the success
of new products; the timing of investing the net proceeds from our offerings;
acquisitions of other companies or assets; sales, brand enhancement and
marketing promotional activities; managerial execution; client training and
support activities; the development of our sales force; loss of clients or
revenues; consolidation in the real estate industry; changes in client budgets;
or our investments in other corporate resources.

We may not be able to attract and retain clients. Our success and
revenues depend on attracting and retaining subscribers to our services. The
CoStar Property, CoStar Tenant and CoStar COMPS subscription contracts, which
generate the largest portion of our revenue, range from terms of one to three
years. At the end of the term of each agreement our clients may decide not to
renew their agreements as a result of several factors, including alternative
products, consolidation in the real estate industry, or economic or competitive
pressures. If clients decide not to renew their agreements, then our revenues
will be adversely affected.

Competition could render our services uncompetitive. The market for
information systems and services in general is highly competitive and rapidly
changing. The barriers to entry for web-based services and businesses are low,
making it possible for the number of competitors to proliferate rapidly. Many of
our existing competitors, or a number of potential new competitors, may have
longer operating histories in the Internet market, greater name recognition,
larger customer bases, lower prices, easier access to data, greater user traffic
and greater financial, technical and marketing resources than us. Our
competitors may be able to undertake more extensive marketing campaigns, adopt
more aggressive pricing policies, make more attractive offers to potential
employees, subscribers, distribution partners and content providers and may be
able to respond more quickly to new or emerging technologies and changes in
Internet user requirements. Increased competition could result in lower revenues
and higher expenses, which would reduce our profitability.

If our data is not accurate, comprehensive or reliable, our business
could be harmed. Our success depends on our clients' confidence in the
comprehensiveness, accuracy, and reliability of the data we provide. The task of
establishing and maintaining accurate and reliable data is challenging. If our
data is not current, accurate, comprehensive or reliable, we could experience
reduced demand for our services or legal claims by our customers, which could
result in lower revenues and higher expenses.

Cyclical downturns and consolidation in the commercial real estate
industry could have an adverse effect on our business. Our business may be
affected by conditions in the commercial real estate industry, including
conditions affecting businesses that supply or invest in that industry. A
decrease in the level of commercial real estate activities could adversely
affect demand for our services. The traditional economic downturns in the
commercial real estate industry could also harm our business. These changes
could decrease renewal rates, which could have a material adverse impact on our
operating results. Also, companies in this industry are consolidating, often in
order to reduce expenses. Consolidation could reduce the number of our existing
clients, reduce the size of our target market and increase our clients'
bargaining power. Any of these factors could adversely affect our business.

General economic conditions could have an adverse effect on our
business. Our business and the commercial real estate industry is particularly
affected by negative trends in the general economy. The success of our business
depends on a number of factors relating to general global, national, regional
and local economic conditions, including inflation, interest rates, perceived
and actual economic conditions, taxation policies, availability of credit,
employment levels, and wage and salary levels. A negative trend in any of these
general economic conditions could adversely affect our business. For example, a
recent downturn in telecom related businesses has forced many of our telecom
company clients to discontinue or curtail their operations, which has resulted
in an increased number of cancellations of our services. If other clients choose
to cancel our services as a result of economic conditions, our financial
position could be adversely affected.

If we are unable to hire, retain and continue to develop our sales
force, it could have a material adverse effect on our business. In order to
support revenue growth, we need to continue to develop, train and retain our
sales force. Our ability to build and develop a strong sales force involves a
number of risks, including: the competition we face from other companies in
hiring and retaining sales personnel; our ability to integrate and motivate
sales personnel; our ability to effectively train our sales force; the



20
21
ability of our sales force to sell an increased number of products; our ability
to manage a multi-location sales organization; and the length of time it takes
new sales personnel to become productive. If we are unable to hire, develop or
retain the members of our sales force, it could have a material adverse effect
on our revenues.

We may not be able to successfully introduce new products. Our future
business and financial success will depend on our ability to continue to
introduce new products into the marketplace. Developing new products imposes
heavy burdens on our systems development department, product managers,
management and researchers. In addition, successfully launching and selling a
new product, such as CoStar Connect or CoStar Exchange, puts pressure on our
sales and marketing resources. If we are unable to develop new products, then
our customers may choose a competitive service over ours and our business may be
adversely affected. In addition, if we incur significant costs in developing new
products, or are not successful in marketing and selling these new products, it
could have a material adverse effect on our results of operations.

We may not be able to adapt to the rapid technological changes to the
Internet and Internet products. To be successful, we must adapt to the rapid
technological changes to the Internet and Internet products by continually
enhancing our products and services, and introducing and integrating new
services and products to capitalize on the technological advances in the
Internet. This process is costly and we cannot assure you that we will be able
to successfully integrate our services and products with the Internet's
technological advances. The collection, storage, management and dissemination of
commercial real estate information from a centralized database on the Internet
is a recent and evolving development. Our market is characterized by rapidly
changing technologies, evolving industry standards, increasingly sophisticated
customer needs and frequent new product introductions. These factors are
exacerbated by the rapid technological change experienced in the computer and
software industries. Our business increasingly depends on our ability to
anticipate and adapt to all of these changes, as well as our customers' ability
to adapt to the use of our existing and future services and products on the
Internet. We could incur substantial costs if we need to modify our services or
infrastructure in order to adapt to these changes, and our customers' failure to
accept these changes could have a material adverse effect on our revenues. If we
incurred significant costs without adequate results or we are unable to adapt to
rapid technological changes, it could have a material adverse effect on our
business.

Unsatisfactory Internet performance, interruption or failure could have
an adverse effect on our business. Our business increasingly depends upon the
satisfactory performance, reliability and availability of our Web site, the
Internet and the World Wide Web. Problems with our Web site, the Internet or the
Web may impede the development of our business for a number of reasons. As the
number of Internet users or their use of Internet resources continues to grow,
and as companies deliver increasingly larger amounts of data over the Internet,
the Internet's infrastructure must also grow. Growth in Internet usage that is
not matched by comparable growth of the infrastructure supporting the Internet
could result in slower response time, cause outright failure of the Internet, or
otherwise adversely affect usage. In addition, if we experience technical
problems in distributing our products over the Web, including without limitation
interruption or failure of services provided by our local exchange carriers or
internet service providers, we could experience reduced demand for our products.

Temporary or permanent outages of our computers, software or
telecommunications equipment could have an adverse effect on our business. Our
operations depend on our ability to protect our database, computers and
software, telecommunications equipment and facilities against damage from
potential dangers such as fire, power loss, security breaches, and
telecommunications failures. Any temporary or permanent loss of one or more of
these systems or facilities from an accident, equipment malfunction or some
other cause could harm our business. If we experience a failure that results in
us not being able to deliver our products to clients, or to update our products,
we could experience reduced demand for our products.

We may be subject to legal liability for displaying or distributing
information. Because the content in our database is distributed to others, we
may be subject to claims for defamation, negligence or copyright or trademark
infringement or claims based on other theories. These types of claims have been
brought, sometimes successfully, against Internet services in the past. We could
also be subject to claims based upon the content that is accessible from our Web
site through links to other Web sites or information on our Web site supplied by
third parties. Even to the extent these claims do not result in liability to us,
we could incur significant costs in investigating and defending against any
claims. Our potential liability for information distributed by us to others
could require us to implement measures to reduce our exposure to liability,
which may require the expenditure of substantial resources and limit the
attractiveness of our service to users.

We may be unable to enforce or defend our ownership and use of
intellectual property. The success of our business depends in large part on the
intellectual property involved in our methodologies, database and software. We
rely on a combination of trade secret, patent, copyright and other laws,
nondisclosure and noncompetition provisions, license agreements and other
contractual provisions and technical measures to protect our intellectual
property rights. However, current law may not provide for adequate protection of
databases and the actual data. In addition, legal standards relating to the
validity, enforceability and scope of protection of proprietary rights in
Internet-related businesses are uncertain and evolving, and we cannot assure you
of the future viability or value of any of our proprietary rights. Our business
could be significantly harmed if we do not succeed in protecting

21
22


our content and our other intellectual property. The same would be true if a
court should find that our services infringe other persons' intellectual
property rights. Any intellectual property lawsuits in which we are involved,
either as a plaintiff or as a defendant, could cost us a significant amount of
time and money. In addition, if any intellectual property claims are adversely
determined, this could result in a material adverse result on our financial
position.

Litigation in which we become involved may adversely affect our
business. We currently and from time to time are involved in litigation
incidental to the conduct of our business. We cannot assure you that we will
have insurance to cover our pending claims or our future claims. Any lawsuits in
which we are involved could cost us a significant amount of time and money. If
any pending claims or future claims are adversely determined, they could have a
material adverse effect on our financial position or results of operations.

Our business depends on retaining and attracting highly capable
management and operating personnel. Our success depends in large part on our
ability to retain and attract management and operating personnel, including our
President and Chief Executive Officer, Andrew Florance, our officers, and other
key employees. Our business requires highly skilled technical, sales,
management, Web-development, marketing and research personnel, who are in high
demand and are often subject to competing offers. To retain and attract key
personnel, we use various measures, including employment agreements, a stock
option plan, and incentive bonuses for key executive officers. These measures
may not be enough to retain and attract the personnel we need or to offset the
impact on our business of a loss of Mr. Florance or other key officers or
employees.

Our business depends on our management team's ability to execute our
business plan. In 2000, we added several key officers to our management team.
Our business depends on the successful integration of these new officers, and
the ability of our assembled management team to successfully execute our
business plan. The inability of our management team to successfully integrate
our new officers or execute our business plan could have an adverse effect on
our operations.

If we do not generate sufficient cash flows from operations, we may need
additional capital. To date, we have financed our operations through cash from
profitable operations in our established markets, the sale of our stock and
borrowing money. If we do not generate enough cash from operations to finance
our business in the future, we will need to raise additional funds through
public or private financing. Selling additional stock could dilute the equity
interests of our stockholders. If we borrow money, we will have to pay interest
and agree to restrictions that may limit our operating flexibility. We may not
be able to obtain funds needed to finance our operations at all or may be able
to obtain funds only on unattractive terms. If we require additional funds and
are not able to obtain such funds, it would have a material adverse effect on
our operations.

Problems with our software could impair the use of our services. The
software underlying our services is complex and may contain undetected errors.
We have previously discovered errors in our proprietary software. Despite
testing, we cannot be certain that errors will not be found in current versions,
new versions or enhancements of that software. Any errors could result in
adverse publicity, impaired use of our services, loss of revenues, cost
increases and legal claims by customers. All these factors could seriously
damage our business, operating results and financial condition.

We may not be able to manage successfully our geographic expansion. Our
future business and financial success will depend on our ability to manage our
geographic expansion. Our efforts to manage expanded growth must occur while
information technology is rapidly changing. These efforts impose additional
burdens on our research, systems development, sales, and general managerial
resources. If we are not able to manage our expanded growth successfully, it
would have a material adverse effect on our profitability.

If we are unable to provide our clients with training and technical
support, our business could be harmed. Since many of our clients are not
sophisticated computer users, it is important that they find our products easy
to use. To meet these needs, we provide client training and have developed a
client support network that seeks to respond to client inquiries as soon as
possible. If we do not maintain adequate training and support levels, we could
experience reduced demand for our services.

Our increasing use of the Internet and the World Wide Web exposes us to
regulatory and other uncertainties. Most of our clients currently receive their
CoStar data via the Internet. This exposes us to various uncertainties arising
from the future course of development of the Internet and the World Wide Web.
Governments in the United States and abroad might adopt laws or regulations
applicable to Internet commerce that could harm our business by, for example,
regulating our transmissions over the Internet or exposing our business to new
taxes in various jurisdictions. User concerns about the privacy and security of
Internet-distributed communications might impede the growth of our business. We
may need to expend substantial resources to protect against security breaches on
our Web site or in our Internet communications.

We have risks associated with legislation in the real estate industry.
Real estate is a regulated industry in the United



22
23


States. These laws and related regulations, and any newly adopted regulations,
may limit or restrict our activities or could require us to expend significant
resources to comply. As the real estate industry evolves in the Internet
environment, legislators, regulators and industry participants may advocate
additional legislative or regulatory initiatives. Should existing laws or
regulations be amended or new laws or regulations be adopted, we may need to
comply with additional legal requirements and incur resulting costs, or we may
be precluded from certain activities. In addition, if we are found to be in
violation of these regulations, we may incur penalties and legal costs or we may
be precluded from certain activities.

International expansion may result in new business risks. If we expand
internationally, this expansion could subject us to new business risks,
including: adapting to the differing business practices and laws in foreign
commercial real estate markets; difficulties in managing foreign operations;
limited protection for intellectual property rights in some countries;
difficulty in accounts receivable collection and longer collection periods; cost
of enforcement of contractual obligations; impact of recessions in economies
outside the United States; currency exchange rate fluctuations; and potentially
adverse tax consequences.

Market volatility may have an adverse effect on our stock price. The
trading price of our common stock has fluctuated widely in the past and, we
expect that like most stocks, it will continue to fluctuate in the future. The
price could fluctuate widely based on numerous factors, including:
quarter-to-quarter variations in our operating results; changes in analysts'
estimates of our earnings; announcements by us or our competitors of
technological innovations or new services; general conditions in the commercial
real estate industry; developments or disputes concerning copyrights or
proprietary rights; regulatory developments; and economic or other factors. In
addition, in recent years, the stock market in general, and the shares of
Internet-related and other technology companies in particular, have experienced
extreme price fluctuations. This volatility has had a substantial effect on the
market prices of securities issued by many companies for reasons unrelated to
the operating performance of the specific companies.

Stock ownership by executive officers and directors provides substantial
influence over matters requiring a vote of stockholders. Our executive officers
and directors, and entities affiliated with them, beneficially own a sufficient
number of shares of our outstanding common stock to exercise substantial
influence over the election of directors and other matters requiring a vote of
stockholders. This concentrated ownership might delay or prevent a change in
control and may impede or prevent transactions in which stockholders might
otherwise receive a premium for their shares.

ITEM 7A QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We do not have significant exposure to market risks associated with
changes in interest rates related to cash equivalent securities held as of
December 31, 2000.

ITEM 8 FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Financial Statements meeting the requirements of Regulation S-X are set
forth beginning at page F-1.

ITEM 9 CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS, ON ACCOUNTING AND
FINANCIAL DISCLOSURE

Not applicable.

ITEM 10 DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

The information required by this Item is incorporated by reference to
our Proxy Statement.

ITEM 11 EXECUTIVE COMPENSATION

The information required by this Item is incorporated by reference to
our Proxy Statement.

ITEM 12 SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

The information required by this Item is incorporated by reference to
our Proxy Statement.



23
24


ITEM 13 CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

The information required by this Item is incorporated by reference to
our Proxy Statement.

ITEM 14 EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

(a)(1) The following financial statements are filed as a part of this
report:

CoStar Group, Inc. Consolidated Financial Statements

(a)(2) All schedules are omitted because they are not applicable or not
required or because the required information is incorporated
here by reference or included in the financial statements or
related notes included elsewhere in this report.

(a)(3) The documents required to be filed as exhibits to this Report
under Item 601 of Regulation S-K are listed in the Exhibit Index
included elsewhere in this report, which list is incorporated
herein by reference.

(b) A current report on Form 8-K was filed on October 26, 2000
relating to a press release announcing our third quarter 2000
earnings results.




24
25


SIGNATURES

Pursuant to the requirements of Section 13 of the Securities Exchange
Act of 1934, as amended, the Registrant has duly caused this report to be signed
on its behalf by the undersigned, thereunto duly authorized, in the City of
Bethesda, State of Maryland, on the 27th day of March, 2001.


COSTAR GROUP, INC.



By: /s/
-------------------------------------
Andrew C. Florance
Chief Executive Officer and President

KNOW ALL PERSONS BY THESE PRESENTS, that each individual whose signature
appears below constitutes and appoints Andrew C. Florance and Frank A. Carchedi
power of substitution, for him and in his name, place and stead, in any and all
capacities, to sign any and all amendments to this report, and to file the same,
with all exhibits thereto and to all documents in connection therewith, with the
Securities and Exchange Commission, granting unto said attorneys-in-fact and
agents, 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 and about the
premises, as fully to confirming all that said attorneys-in-fact and agents or
any of them, or his or their substitute or substitutes, may lawfully do or cause
to be done by virtue hereof.

Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, this report has been signed by the following persons in the capacities
indicated on the dates indicate.

<TABLE>
<CAPTION>
SIGNATURE CAPACITY DATE
---------- -------- ----
<S> <C> <C>

/s/ Chairman of the Board March 27, 2001
- ------------------------------------------
Michael R. Klein

/s/ Chief Executive Officer and March 27, 2001
- ------------------------------------------ President, and a Director
Andrew C. Florance (Principal Executive Officer)


/s/ Chief Financial Officer March 27, 2001
- ------------------------------------------ (Chief Financial and Accounting Officer)
Frank A. Carchedi

/s/ Director March 27, 2001
- ------------------------------------------
David Bonderman

/s/ Director March 27, 2001
- ------------------------------------------
Warren H. Haber

/s/ Director March 27, 2001
- ------------------------------------------
Josiah O. Low, III

/s/ Director March 27, 2001
- ------------------------------------------
John Simon
</TABLE>



25
26


COSTAR GROUP, INC.
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS


COSTAR GROUP, INC.

<TABLE>
<S> <C>
Report of Independent Auditors ................... F-2

Consolidated Statements of Operations ............ F-3

Consolidated Balance Sheets ...................... F-4

Consolidated Statements of Stockholders' Equity .. F-5

Consolidated Statements of Cash Flows ............ F-6

Notes to Consolidated Financial Statements ....... F-7
</TABLE>


F-1
27


REPORT OF INDEPENDENT AUDITORS

Board of Directors and Stockholders
CoStar Group, Inc.

We have audited the accompanying consolidated balance sheets of CoStar Group,
Inc. as of December 31, 1999 and 2000, and the related consolidated statements
of operations, stockholders' equity and cash flows for each of the three years
in the period ended December 31, 2000. These 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 auditing standards generally accepted
in the United States. 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 financial statements referred to above present fairly, in
all material respects, the consolidated financial position of CoStar Group, Inc.
at December 31, 1999 and 2000, and the consolidated results of its operations
and its cash flows for each of the three years in the period ended December
31, 2000, in conformity with accounting principles generally accepted in the
United States.

/s/ Ernst & Young LLP

McLean, Virginia
February 13, 2001


F-2
28


COSTAR GROUP, INC.
CONSOLIDATED STATEMENTS OF OPERATIONS


<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
-------------------------------------------
1998 1999 2000
----------- ----------- ------------
<S> <C> <C> <C>
Revenues........................................... $13,900,165 $ 30,234,213 $ 58,502,302
Cost of revenues................................... 4,561,619 13,243,813 30,202,464
----------- ------------ ------------
Gross margin....................................... 9,338,546 16,990,400 28,299,838

Operating expenses:

Selling and marketing.............................. 6,935,768 17,964,829 37,644,107
Software development............................... 704,194 1,108,197 3,864,380
General and administrative......................... 4,919,976 11,054,402 27,085,784
Purchase amortization.............................. 304,674 2,245,835 8,928,298
Acquired in-process development.................... -- -- 5,812,000
----------- ------------ ------------
12,864,612 32,373,263 83,334,569
----------- ------------ ------------
Loss from operations............................... (3,526,066) (15,382,863) (55,034,731)
Other income (expense):
Loss on disposal of assets......................... -- -- (180,721)
Interest expense................................... (119,716) -- (295,880)
Interest income.................................... 460,369 3,106,190 3,866,133
Other expense...................................... -- -- (54,764)
----------- ------------ ------------
Net loss before income taxes....................... (3,185,413) (12,276,673) (51,699,963)
Income tax benefit................................. -- -- 2,045,014
----------- ------------ ------------
Net loss........................................... $(3,185,413) $(12,276,673) $(49,654,949)
=========== ============ ============
Net loss per share - basic and diluted............. $ (0.44) $ (1.05) $ (3.28)
=========== ============ ============
Weighted average common shares..................... 7,213,037 11,726,589 15,136,976
=========== ============ ============
</TABLE>


See accompanying notes.



F-3
29


COSTAR GROUP, INC.
CONSOLIDATED BALANCE SHEETS


<TABLE>
<CAPTION>
DECEMBER 31,
---------------------------
1999 2000
------------ ------------
<S> <C> <C>
ASSETS
Current assets:
Cash and cash equivalents................................. $ 94,074,127 $ 47,101,242
Accounts receivable, less allowance for doubtful accounts
of approximately $756,000 and $2,890,000 as of
December 31, 1999 and 2000............................. 2,840,912 6,148,399
Prepaid expenses and other current assets................. 2,458,092 861,613
------------ ------------
Total current assets........................................ 99,373,131 54,111,254
Property and equipment:
Leasehold improvements.................................... 326,147 2,074,122
Furniture, office equipment and research vehicles......... 3,386,947 7,054,810
Computer hardware and software............................ 4,545,714 12,038,698
------------ ------------
8,258,808 21,167,630

Accumulated depreciation and amortization................... (2,376,996) (6,474,886)
------------ ------------
5,881,812 14,692,744

Goodwill, intangibles and other assets...................... 31,222,190 76,658,067
Deposits.................................................... 427,649 408,561
------------ ------------
Total assets................................................ $136,904,782 $145,870,626
============ ============

LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:

Accounts payable.......................................... $ 1,842,442 $ 1,417,199
Accrued wages and commissions............................. 2,555,639 5,093,220
Accrued expenses.......................................... 3,186,141 7,049,886
Deferred revenue.......................................... 2,635,311 4,949,289
------------ ------------
Total current liabilities................................... 10,219,533 18,509,594

Deferred taxes.............................................. 6,988,446 987,262

Stockholders' equity:
Preferred stock, $.01 par value, 2,000,000 shares
authorized, none outstanding........................... -- --
Common stock, $.01 par value; 30,000,000 shares
authorized; 12,967,275 and 15,545,139 issued and
outstanding as of December 31, 1999 and 2000........... 129,673 155,451
Additional paid-in capital................................ 146,455,554 202,761,692
Retained deficit.......................................... (26,888,424) (76,543,373)
------------ ------------
Total stockholders' equity.................................. 119,696,803 126,373,770
------------ ------------
Total liabilities and stockholders' equity.................. $136,904,782 $145,870,626
============ ============
</TABLE>

See accompanying notes.



F-4
30



COSTAR GROUP, INC.
CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY


<TABLE>
<CAPTION>
COMMON STOCK ADDITIONAL TOTAL
-------------------- PAID-IN RETAINED STOCKHOLDERS'
SHARES AMOUNT CAPITAL DEFICIT EQUITY
---------- -------- ------------ ------------ -------------
<S> <C> <C> <C> <C> <C>
Balance at December 31, 1997.... 5,754,017 $57,540 $ 14,286,297 $(11,426,338) $ 2,917,499
Exercise of stock options..... 48,480 485 79,515 -- 80,000
Stock issued for initial
public offering............ 2,875,000 28,750 22,708,689 -- 22,737,439
Stock issued for
acquisition................ 93,530 935 584,398 -- 585,333
Warrants...................... -- -- 50,000 -- 50,000
Reduction of note receivable
from stockholder........... -- -- 18,446 -- 18,446
Net loss...................... -- -- -- (3,185,413) (3,185,413)
---------- -------- ------------ ------------ ------------
Balance at December 31, 1998.... 8,771,027 87,710 37,727,345 (14,611,751) 23,203,304
Exercise of stock options..... 121,907 1,219 927,447 -- 928,666
Stock issued for follow-on
public offering............ 3,019,495 30,195 97,381,198 -- 97,411,393
Stock issued for
acquisitions............... 1,046,516 10,466 10,325,271 -- 10,335,737
Stock issued for compensation. 8,330 83 74,887 -- 74,970
Reduction of note receivable
from stockholder........... -- -- 19,406 -- 19,406
Net loss...................... -- -- -- (12,276,673) (12,276,673)
--------- -------- ------------ ------------ ------------
Balance at December 31, 1999.... 12,967,275 129,673 146,455,554 (26,888,424) 119,696,803
Exercise of stock options..... 269,776 2,698 2,099,285 -- 2,101,983
Stock issued for
acquisitions............... 2,272,794 22,728 54,207,205 -- 54,229,933
Exercise of warrants.......... 35,294 352 (352) -- --
Net loss...................... -- -- -- (49,654,949) (49,654,949)
--------- -------- ------------ ------------ ------------
Balance at December 31, 2000.... 15,545,139 $155,451 $202,761,692 $(76,543,373) $126,373,770
========== ======== ============ ============ ============
</TABLE>

See accompanying notes.



F-5
31



COSTAR GROUP, INC.
CONSOLIDATED STATEMENTS OF CASH FLOWS


<TABLE>
<CAPTION>
YEAR ENDED DECEMBER 31,
-------------------------------------------
1998 1999 2000
----------- ------------ ------------
<S> <C> <C> <C>
Operating activities:
Net loss........................................... $(3,185,413) $(12,276,673) $(49,654,949)
Adjustments to reconcile net loss to net cash
used in operating activities:
Depreciation..................................... 428,702 1,148,531 4,261,468
Amortization..................................... 705,806 3,705,238 14,547,368
Acquired in-process development.................. -- -- 5,812,000
Loss on disposal of assets....................... -- -- 180,721
Income tax benefit............................... -- -- (2,045,014)
Provision for losses on accounts receivable...... 414,903 974,578 2,312,089
Non-cash compensation charges.................... 68,446 19,406 --
Changes in operating assets and liabilities:
Accounts receivable.............................. (639,138) (2,494,232) (1,329,576)
Prepaid expenses and other current assets........ (323,405) (2,057,418) 3,081,479
Deposits......................................... (87,550) (230,493) 1,188,088
Accounts payable and accrued expenses............ 1,579,633 3,773,811 (1,661,917)
Deferred revenue................................. 744,590 (39,410) (3,538,022)
----------- ----------- -----------
Net cash used in operating activities............ (293,426) (7,476,662) (26,846,265)
Investing activities:
Purchases of property and equipment, net........... (1,283,666) (4,520,375) (11,493,570)
Other assets....................................... (985,262) (2,198,832) (3,133,033)
Acquisitions, net of acquired cash................. (7,033) (9,736,950) (3,071,000)
----------- ----------- -----------
Net cash used in investing activities............ (2,275,961) (16,456,157) (17,697,603)
Financing activities:
Payment of line of credit.......................... (1,000,000) -- --
Payment of subordinated debt to stockholder........ (650,000) -- --
Payment of long-term liability..................... -- -- (4,531,000)
Net proceeds from public offerings................. 22,737,439 97,411,393 --
Net proceeds from exercise of stock options........ 80,000 928,666 2,101,983
----------- ----------- -----------
Net cash provided by (used in)
investing activities............................. 21,167,439 98,340,059 (2,429,017)
Net increase (decrease) in cash and cash
equivalents...................................... 18,598,052 74,407,240 (46,972,885)
Cash and cash equivalents at beginning of year..... 1,068,835 19,666,887 94,074,127
----------- ----------- -----------
Cash and cash equivalents at end of year........... $19,666,887 $94,074,127 $47,101,242
=========== =========== ===========
</TABLE>


See accompanying notes.



F-6
32


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1. ORGANIZATION

CoStar Group, Inc. (the "Company") has created a comprehensive,
proprietary, national database of commercial real estate information for
metropolitan areas throughout the United States. Based on its unique database,
the Company provides information to the commercial real estate and related
business community and operates within one reportable business segment. The
information is distributed to its clients under license agreements, which are
typically one to three years in duration.

2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION

CoStar Group, Inc. is a Delaware corporation and was incorporated in
February 1998 to succeed its predecessors, Realty Information Group L.P.
("RIGLP") and OLD RIG, Inc. ("RIGINC"). RIGLP was an operating entity, while
RIGINC was a holding company. In connection with the Company's initial public
offering on July 1, 1998 ("the Offering"), RIGLP and RIGINC merged with the
Company pursuant to the RIG Contribution Agreement dated March 5, 1998. The
limited partners of RIGLP (other than RIGINC) and all of the stockholders of
RIGINC received 3.03 shares of Common Stock of the Company per each limited
partnership unit or share of common stock exchanged, for a total of 5,754,017
shares. As a result of the reorganization of these entities, the Company owned
(directly or indirectly) all of the capital stock of RIGINC and all the equity
of RIGLP.

The merger has been accounted for as a reorganization of entities under
common control similar to a pooling of interests. Following the merger, each
shareholder of the Company maintained their exact same ownership of the
operating entity, RIGLP, as before the merger. The transfer of assets and
liabilities of RIGLP and RIGINC has been recorded at the historical carrying
values. The financial statements are presented as if the Company was in
existence throughout all periods presented, as one operating entity. All share
amounts have been restated to reflect the conversion of partnership units to
common stock of the Company. On January 1, 1999, RIGLP and RIGINC were merged
into a newly formed corporation, CoStar Realty Information, Inc. ("CoStar
Realty"), a wholly owned subsidiary of the Company.

Additionally, the consolidated financial statements of the Company
include the accounts of LeaseTrend, Inc. ("LeaseTrend") acquired on January 8,
1999, Jamison Research, Inc. ("Jamison") acquired on January 22, 1999, ARES
Development Group, LLC ("ARES") acquired on September 15, 1999, COMPS.COM, Inc.
("Comps") acquired on February 10, 2000 and First Image Technologies, Inc.
("First Image") acquired and merged into Comps on November 9, 2000. LeaseTrend
and Jamison were merged into CoStar Realty on December 31, 1999 and ARES was
merged into CoStar Realty on December 31, 2000.

CONSOLIDATION

The consolidated financial statements include the accounts of the
Company and its subsidiaries after elimination of all significant intercompany
transactions.

USE OF ESTIMATES

The preparation of financial statements in conformity with accounting
principles generally accepted in the United States requires management to make
estimates and assumptions that affect the amounts reported in the financial
statements and accompanying notes. Actual results could differ from those
estimates.

RECLASSIFICATIONS

Certain previously reported amounts have been reclassified to conform to
the Company's current presentation.



F-7
33


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

REVENUE RECOGNITION

Revenue from the sale of licenses is recognized on a straight-line basis
over the term of the license, which is typically from one to three years.
Deferred revenue results from advance cash receipts from the sales of licenses
and is recognized over the term of the licenses.

SIGNIFICANT CUSTOMERS

No single customer accounted for more than 5% of our revenues as of
December 31, 2000. The Company operates solely within one business segment.

COMPREHENSIVE INCOME (LOSS)

For the years ended December 31, 1998, 1999 and 2000, the Company's net
income (loss) reflects comprehensive income (loss) and accordingly, no
additional disclosure is presented.

ADVERTISING COSTS

The Company expenses advertising costs as incurred. Advertising expense
was $904,600, $1,332,000, and $4,028,000 for the years ended December 31, 1998,
1999, and 2000, respectively.

INCOME TAXES

Through June 30, 1998, the Company operated as a partnership for federal
income tax purposes under which income, losses, deductions and credits were
allocated to and reported by the partners on their individual income tax
returns. Accordingly, no provision for income tax was recorded in the financial
statements. In connection with the offering, the partnership became part of the
Company and its taxable income (loss) flowed through to the Company. Commencing
in 1998, the Company provides for income taxes under the provisions of Statement
of Financial Accounting Standards No. 109 ("FAS 109"). Deferred income taxes
result from temporary differences between the tax basis of assets and
liabilities and the basis reported in the consolidated financial statements.

STOCK-BASED COMPENSATION

The Company accounts for its stock-based compensation in accordance with
APB No. 25, "Accounting for Stock Issued to Employees" ("APB 25") using the
intrinsic value method. Stock-based compensation related to options granted to
non-employees is accounted for using the fair value method in accordance with
the Statement of Financial Accounting Standard No. 123 "Accounting for
Stock-Based Compensation" ("FAS 123"). The Company has made pro forma
disclosures required by FAS 123 for all options granted.

CASH AND CASH EQUIVALENTS

The Company considers all highly liquid investments purchased with an
original maturity of three months or less to be cash equivalents. Cash
equivalents consist of money market fund investments and United States
Government Securities, substantially all of which are held with two
institutions. At December 31, 2000, cash of $180,000 and $100,000 was held in
accounts to support letters of credit securing lease obligations at the
Company's Bethesda, Maryland headquarters and the on-line e-commerce portion of
the Comps business, respectively.




F-8
34


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

CONCENTRATION OF CREDIT RISK AND FINANCIAL INSTRUMENTS

The Company performs ongoing credit evaluations of its customers'
financial condition and generally does not require that its customers'
obligations to the Company be secured. The Company maintains reserves for credit
losses, and such losses have been within management's expectations. The risk of
nonpayment of the Company's accounts receivable is mitigated by the large size
and widespread nature of the Company's customer base and lack of dependence on
individual customers. The carrying amount of the accounts receivable
approximates their net realizable value. The carrying value of the Company's
financial instruments including cash and cash equivalents, accounts receivable,
accounts payable, accrued expenses and notes payable approximates fair value.

PROPERTY AND EQUIPMENT

Property and equipment are stated at cost. Depreciation and amortization
are calculated on the straight-line method over the following estimated useful
lives of the assets:

Leasehold improvements Shorter of lease term or useful life
Furniture and office equipment Seven years
Research vehicles Three years
Computer hardware and software Three to five years

CAPITALIZED PRODUCT DEVELOPMENT COSTS

Initial costs to develop and produce the Company's database and software
products, including direct labor, contractors and applicable overhead are
capitalized from the time technological feasibility is determined until initial
product release. Prior to technological feasibility, such costs are classified
as software development and expensed as incurred. Ongoing significant
enhancements of the products are capitalized subsequent to initial product
release. Amortization of capitalized costs is based on the greater of the amount
computed using (a) the ratio of current gross revenues to the sum of current and
anticipated gross revenues, or (b) the straight-line method over the remaining
estimated economic life of the product, typically five years after initial
product release. Included in amortization is approximately $160,000, $219,000
and $318,000 of expense related to the capitalized product development costs for
the years ended December 31, 1998, 1999 and 2000, respectively.

GOODWILL, INTANGIBLES AND OTHER ASSETS

Goodwill and other intangibles represent the unamortized excess of the
cost of acquiring companies over the fair value of such companies' net tangible
assets at the dates of acquisition. Goodwill, acquired database technology, and
customer base, which are related to the Company's acquisitions as described in
Note 3, are being amortized on a straight-line basis over periods ranging from
two to ten years. The cost of photography is amortized on a straight-line basis
over five years.

LONG-LIVED ASSETS

In accordance with Statement of Financial Accounting Standards ("SFAS")
No. 121, "Accounting for the Impairment of Long-Lived Assets and for Long-Lived
Assets to be disposed of", management periodically reviews, if impairment
indicators exist, the carrying value and lives of long-lived assets. For
long-lived assets to be held and used, the Company bases its evaluation on such
impairment indicators as the nature of the assets, the future economic benefit
of the assets, as well as other external market conditions or factors that may
be present. If such impairment indicators are present or other factors exist
that indicate that the carrying amount of the asset may not be recoverable, the
Company determines whether an impairment has occurred through the use of an
undiscounted cash flows analysis of assets at the lowest level for which
identifiable cash flows exist. If impairment has occurred, the Company
recognizes a loss for the difference between the carrying amount and the
estimated value of the asset. The fair value of the asset is measured using
discounted cash flow analysis or other valuation techniques. In addition, the
Company evaluates the recoverability of enterprise goodwill by assessing whether
the book value can be recovered through expected and undiscounted cash flows.



F-9
35

COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

NET LOSS PER SHARE

Basic loss per share is based on the weighted average shares outstanding
during the period. The calculation of diluted loss per share reflects the
dilutive effects of outstanding stock and other dilutive common stock
equivalents if any. Diluted loss per share is equal to the basic loss per share
as the effect on the calculation of basic loss per share assuming the exercise
of common stock equivalents is antidilutive.

NEW ACCOUNTING PRONOUNCEMENTS

In June 2000, the Financial Accounting Standards Board ("FASB") issued
Statement of Financial Accounting Standards ("SFAS") No. 138, "Accounting for
Certain Derivative Instruments and Certain Hedging Activities," which amends
SFAS No. 133, "Accounting for Derivative Instruments and Hedging Activities."
SFAS No. 133 was previously amended by SFAS No. 137 "Accounting for Derivative
Instruments and Hedging Activities - Deferral of the Effective Date of FASB
Statement 133," which deferred the effective date of SFAS No. 133 to fiscal
years beginning after June 15, 2000. The Company expects to adopt SFAS No. 138
and SFAS No. 133 effective January 1, 2001. SFAS No. 133 and SFAS No. 138 will
require the Company to recognize all derivatives on the balance sheet at fair
value. Derivatives that are not hedges must be adjusted to fair value through
income. If the derivative is a hedge, depending on the nature of the hedge,
changes in the fair value of derivatives will either be offset against the
change in fair value of the hedged assets, liabilities, or firm commitments
through earnings or recognized in other comprehensive income until the hedged
item is recognized in earnings. The ineffective portion of a derivative's change
in fair value will be recognized immediately in earnings. The adoption of these
new standards is not expected to materially effect the Company's financial
position or results of operations.


In December 1999, the Securities and Exchange Commission ("the
Commission") issued Staff Accounting Bulletin ("SAB") No. 101, "Revenue
Recognition in Financial Statements." SAB 101 summarizes certain of the
Commission's views in applying generally accepted accounting principles to
revenue recognition in financial statements. In June 2000, the Commission issued
SAB 101B to defer the effective date of implementation of SAB 101 to the fourth
quarter of 2000. The Company's adoption of SAB 101 did not have an effect on its
results of operations and financial position.

3. ACQUISITIONS

On January 8, 1999, the Company acquired all of the outstanding capital
stock of LeaseTrend, Inc., a Cincinnati based provider of commercial real estate
information, for $4,500,000 in cash and 566,671 shares of the Company's common
stock. The transaction was accounted for as a purchase and the consideration was
valued for accounting purposes at approximately $9,200,000 including acquisition
expenses.

On January 22, 1999, the Company acquired all of the outstanding capital
stock of Jamison Research, Inc., an Atlanta based provider of commercial real
estate information, for $5,284,000 in cash and 446,637 shares of the Company's
common stock. The transaction was accounted for as a purchase and the
consideration was valued for accounting purposes at approximately $10,300,000
including acquisition expenses.

On September 15, 1999, the Company acquired all of the membership
interests of ARES Development Group, LLC, Los Angeles based developers and
distributors of ARES for ACT!, for $250,000 in cash and 33,208 shares of the
Company's common stock. The transaction was accounted for as a purchase and the
consideration was valued for accounting purposes at approximately $1,265,000
including acquisition expenses. In addition, the acquisition agreement provided
for $1,000,000 of additional consideration (in a combination of cash and stock)
to be paid by the Company upon the achievement of certain operating goals by the
members of ARES. In February 2000, the Company issued 2,140 shares of its common
stock and paid $437,500 in cash to the members of ARES for the achievement of
the first operating goal by the members of ARES. As a result, the Company
adjusted goodwill by approximately $515,000. In October 2000, the Company issued
an additional 2,196 shares of its common stock and paid an additional $437,500
in cash to the members of ARES for the achievement of the final operating goal
by the members of ARES. As a result, the Company adjusted goodwill by
approximately $512,000.

On February 10, 2000, the Company acquired all of the outstanding
capital stock of COMPS.COM, Inc., a San Diego based provider of commercial real
estate information, for $49,015,905 in cash and 2,259,034 shares of the
Company's common stock. The acquisition has been accounted for using purchase
accounting and has been valued at approximately $101,379,000 for accounting
purposes. The purchase price was allocated primarily to cash, acquired database
technology and other intangibles, which will be amortized over a period of 2 to
10 years. In connection with the acquisition, $5,812,000 of the purchase price
was allocated to purchased in-process development, and expensed upon acquisition
because the technological feasibility of products under development had not been
established and no future alternative use existed. The acquired in-process
development was analyzed through an independent third-party valuation using the
expected cash flow approach.

On November 9, 2000, CoStar completed the acquisition of First Image
Technologies, Inc. The primary asset of First Image is the Metropolis software
system, a single interface that combines commercial real estate data from
multiple information providers into a comprehensive resource. The Company
acquired all of the outstanding capital stock of First Image Technologies, Inc.
for approximately $665,000 in cash and 9,424 shares of the Company's common
stock. The transaction was accounted for as a purchase and the initial
consideration was valued for accounting purposes at approximately $950,000
including acquisition expenses. In addition, the acquisition agreement provides
for $950,000 of additional consideration (in a combination of cash and stock) to
be paid by the Company upon the achievement of certain operating goals by the
sole stockholder of First Image.

F-10
36


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

3. ACQUISITIONS (CONTINUED)

The operations of all acquired businesses were included in the Company's
statement of operations after the respective date of acquisitions. Except for
the portion of the purchase price of acquisitions acquired with cash, these
transactions have been excluded from the statements of cash flows.

The Company's unaudited pro forma condensed consolidated statements of
operations for the year ended December 31, 1999 and 2000, assuming the
acquisition of LeaseTrend, Jamison, ARES, Comps and First Image had been
consummated as of January 1 of each period, is summarized as follows:


<TABLE>
<CAPTION>
For the Year
Ended December 31,
1999 2000
--------------------------------
<S> <C> <C>
Revenues $ 30,989,000 $ 60,632,000
------------ ------------
Net loss $(12,694,000) $(55,458,000)
============ ============
Weighted average shares 11,787,000 15,398,089
============ ============
Net loss per share - basic and diluted $ (1.08) $ (3.60)
============ ============
</TABLE>

4. GOODWILL, INTANGIBLES AND OTHER ASSETS

Goodwill, intangibles and other assets consists of the following:


<TABLE>
<CAPTION>
December 31, December 31,
1999 2000
------------- ------------
<S> <C> <C>
Capitalized product development costs $ 1,435,116 $ 1,801,146
Accumulated amortization (616,641) (934,767)
------------ ------------
818,475 866,379
------------ ------------
Building photography 3,117,738 4,466,974
Acquired database technology 3,552,000 17,649,324
Customer base 19,347,326 31,645,487
Tradename -- 4,198,000
Goodwill 9,893,421 37,567,915
Accumulated amortization (5,506,770) (19,736,012)
------------ ------------
30,403,715 75,791,688
------------ ------------
Goodwill, intangibles and other assets $ 31,222,190 $ 76,658,067
============ ============
</TABLE>



F-11
37


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

5. RELATED PARTY TRANSACTIONS

During 1997, the general partner of RIGLP obtained a commitment from a
partner for an additional $1,000,000 of subordinated, unsecured credit, bearing
interest at the prime interest rate plus 1%. In connection with the commitment,
the individual contributing partner received warrants for the purchase of 45,450
shares of Common Stock. The warrants had a two-year term beyond the Company's
initial public offering and provided for the purchase of an equivalent number of
shares at a price of 10% less than the price of the stock sold in the initial
public offering ($9.00 per share). During February 2000, the partner exercised
warrants for the purchase of 45,450 shares by a net exercise and received 35,294
shares.

Commencing in May 1995 the Company agreed to pay an investor $10,000 per
month and the Chairman of the Company $6,667 per month for consulting services.
During 1998, the Company incurred fees of approximately $82,912 related to such
consulting services. These agreements were terminated in connection with the
Company's initial public offering.

6. INCOME TAXES

The Company accounts for taxes under Statement of Financial Accounting
Standards No. 109, Accounting for Income Taxes (SFAS 109). Under SFAS 109,
deferred tax liabilities and assets are determined based on the difference
between the financial statement and tax basis of assets and liabilities using
enacted rates expected to be in effect during the year in which the differences
reverse. Deferred taxes reflect the net tax effects of temporary differences
between the carrying amounts of assets and liabilities for financial reporting
purposes and tax purposes. Through June 30, 1998 the Company operated as a
partnership for federal income tax purposes. The Company paid no income taxes in
1998, 1999 or 2000.

<TABLE>
<CAPTION>
DECEMBER 31, DECEMBER 31,
1999 2000
------------ ------------
<S> <C> <C>
Deferred tax assets:
Reserve for bad debts.................................. $ 292,000 $ 1,116,139
Accrued compensation................................... 486,600 736,056
Net operating losses................................... 5,658,500 32,483,747
Other assets........................................... 561,000 3,553,488
----------- -----------
Total deferred tax assets......................... 6,998,100 37,889,430
----------- -----------
Deferred tax liabilities:
Depreciation........................................... (291,000) (756,039)
Product development costs.............................. (337,000) (334,596)
Identified intangibles associated with purchase
accounting......................................... (6,988,000) (18,092,461)
----------- -----------
Total deferred tax liabilities.................... (7,616,000) (19,183,096)
----------- -----------
Net deferred tax (liability) asset..................... (617,900) 18,706,334
Valuation allowance.................................... (6,370,100) (19,693,596)
----------- -----------
Net deferred taxes.......................................... $(6,988,000) $ (987,262)
=========== ===========
</TABLE>

A valuation allowance has been established against the related net
deferred tax assets due to the uncertainty of realization. The Company's change
in valuation allowance amounted to approximately $5,277,000 and $13,323,000
during the years ended December 31, 1999 and 2000. The increase in the valuation
allowance relates to current period operating losses and in 2000 was offset by
the recognition of deferred tax assets associated with net operating losses
utilized as a result of acquisitions made during the period.

The Company's provision for income taxes resulted in effective tax rates
that varied from the statutory federal income tax rate as follows:

<TABLE>
<CAPTION>
DECEMBER 31, DECEMBER 31, DECEMBER 31,
1998 1999 2000
------------ ------------ ------------
<S> <C> <C> <C>
Expected federal income tax provision (benefit) at 34%........ $ (1,083,000) $ (4,174,000) $(17,577,988)
State income taxes, net of federal benefit.................... (147,000) (567,200) (2,388,538)
Increase in valuation allowance............................... 958,000 5,277,100 19,405,316
Expenses not deductible for tax purposes...................... 277,000 (535,900) (1,483,804)
Other......................................................... (5,000) - -
------------- ------------ ------------
Deferred income tax benefit $ -- $ -- $ (2,045,014)
============= ============ =============
</TABLE>

At December 31, 2000, the Company had net operating loss carryforwards
for federal income tax purposes of approximately $62,984,000, which expire, if
unused, from the year 2010 through the year 2020. The tax benefit of
approximately $9,700,000 of net operating losses related to stock options will
be credited to equity when the benefit is realized through utilization of the
net operating loss carryforwards. Additionally, during 2000 the Company made an
acquisition which had net operating loss carryforwards of approximately
$19,359,000, which expire, if unused, through the year 2019. The use of these
acquired net operating losses is subject to limitation imposed by the Internal
Revenue Code and is also restricted to the taxable income of the subsidiaries
generating the losses.

During 1999 and 2000, the Company made acquisitions reported using the
purchase method of accounting. These acquisitions included identified intangible
assets, which in accordance with SFAS 109, required deferred taxes and related
goodwill to be recorded. At December 31, 1999 and 2000, the amount of the
deferred taxes related to these items was approximately $6,988,000 and
$18,092,000, respectively. The deferred taxes will reverse over the life of the
identified intangible assets. Additionally, net operating losses from the
acquired company and net operating losses from CoStar prior to the acquisition,
totaling approximately $39,600,000, were valued in connection with the
acquisition. The reversal of these deferred taxes in future periods may result
in additions to the valuation allowance and the recording of additional tax
expense in accordance with the provisions of SFAS 109, requiring evaluation
regarding future realization.

F-12
38


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

7. COMMITMENTS

The Company leases office facilities and office equipment under various
noncancelable operating leases. The leases contain various renewal options. Rent
expense for the years ended December 31, 1998, 1999 and 2000 was approximately
$1,031,000, $2,440,000 and $5,595,000, respectively.

Future minimum lease payments as of December 31, 2000 are as follows:

<TABLE>
<S> <C>
2001 3,989,000
2002 3,567,000
2003 3,140,000
2004 2,970,000
2005 and thereafter 14,906,000
--------------------
$28,572,000
====================
</TABLE>




F-13
39


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

8. SALES OF COMMON STOCK

On July 1, 1998, the Company completed an initial public offering of
2,500,000 shares of common stock for $9.00 per share, and on August 9, 1998, the
Company's underwriter exercised its over-allotment option to purchase an
additional 375,000 shares of common stock (together, the "IPO"). Total proceeds
of the IPO including shares issued pursuant to the over-allotment option were
$22,737,000, after deducting underwriting discounts and commissions of
$1,811,000 and offering expenses of $1,326,000. The Company repaid the amount
owed on its line of credit and the subordinated debt to a stockholder, for a
total $1,650,000, out of the proceeds of the IPO.


On May 10, 1999, the Company completed a follow-on public offering of
3,019,495 shares of common stock (including the over-allotment option) (the
"Follow-On Offering") for $34.50 per share. Total proceeds of the Follow-On
Offering were $97,411,000, after deducting underwriting discounts and
commissions and offering expenses of $1,024,000.

9. NET LOSS PER SHARE

The following table sets forth the computation of basic and diluted net
loss per share:


<TABLE>
<CAPTION>
YEARS ENDED DECEMBER 31,
-----------------------------------------
1998 1999 2000
----------- ----------- ------------
<S> <C> <C> <C>
Numerator:
Net loss.............................. $(3,185,413) $(12,276,673) $(49,654,949)
=========== ============ ============
Denominator:
Denominator for basic earnings per
share -- weighted-average shares.... 7,213,037 11,726,589 15,136,976
Effect of dilutive securities:
Dilutive potential common shares...... -- -- --
----------- ------------ ------------
Denominator for diluted earnings per
share -- adjusted weighted-average
shares.............................. 7,213,037 11,726,589 15,136,976
=========== ============ ============
Basic and diluted net loss per
share............................... $ (0.44) $ (1.05) $ (3.28)
=========== ============ ============
</TABLE>

The weighted average number of shares does not include stock options and
warrants outstanding of 922,944, 1,352,142 and 1,716,957 as of December 1998,
1999 and 2000, respectively, as their effect would be anti-dilutive for the
periods presented.



F-14
40


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

10. EMPLOYEE BENEFIT PLANS

Option Plan

In March 1996 RIGLP adopted the 1996 Option and Purchase Plan (the "1996
Plan"), under which 606,000 shares of Common Stock were reserved for issuance
upon the exercise of options granted to officers, executive personnel, directors
and key employees. Certain options previously granted were included in the 1996
Plan. In connection with the IPO, all of the options granted under the 1996 Plan
were replaced with options under the 1998 Plan (as defined below).

In June 1998 the Company's Board of Directors adopted the Stock
Incentive Plan (the "1998 Plan") prior to consummation of the IPO. The 1998 Plan
provides for the grant of stock options to officers, directors and employees of
the Company and its subsidiaries. Options granted under the 1998 Plan may be
incentive or non-qualified stock options. The exercise price for a stock option
may not be less than the fair market value of the Company's Common Stock on the
date of grant. Stock options granted under the 1998 Plan may not be transferred
other than by will or by the laws of descent and distribution. Upon the
occurrence of a Change of Control, as defined in the 1998 Plan, all outstanding
unexercisable options under the 1998 Plan immediately become exercisable. The
Company has reserved 3,000,000 shares of Common Stock for issuance under the
1998 Plan. Unless terminated sooner by the Board of Directors, the 1998 Plan
will terminate in 2008.

Option activity was as follows:


<TABLE>
<CAPTION>
WEIGHTED-
NUMBER OF PRICE PER AVERAGE
SHARES SHARE EXERCISE PRICE
---------------- --------------- ----------------
<S> <C> <C> <C>
Outstanding at December 31, 1997............... 398,384 $3.39
Granted...................................... 540,900 $5.63-$13.75 $8.70
Exercised.................................... (48,480) $1.65 $1.65
Canceled or expired.......................... (13,310) $9.00 $9.00
-------
Outstanding at December 31, 1998............... 877,494 $ 6.77
Granted...................................... 635,945 $9.00-$48.00 $27.17
Exercised.................................... (121,907) $5.63-$34.95 $ 7.62
Canceled or expired.......................... (39,390) $4.07-$48.00 $18.25
-------
Outstanding at December 31, 1999.............. 1,352,142 $15.95
Granted...................................... 840,950 $20.13-$52.13 $28.43
Exercised.................................... (269,776) $3.45-$30.00 $ 8.26
Canceled or expired.......................... (206,359) $5.63-$49.50 $26.15
-------
Outstanding at December 31, 2000.............. 1,716,957 $22.05
=======
Exercisable at December 31, 2000.............. 686,887 $14.59
=======
Exercisable at December 31, 1999............... 531,530 $ 8.89
=======
Exercisable at December 31, 1998............... 425,944 $ 6.77
=======
</TABLE>


The Company follows the disclosure provisions of SFAS No. 123.
Accordingly, no compensation cost has been recognized for the Plan. Had
compensation expense related to the Plan been determined based on the fair value
at the grant date for options granted consistent with the provisions of SFAS No.
123, Company's pro forma net loss and net loss per share would have been
approximately $3,912,000, $16,824,000 and $57,597,000, and $0.54, $1.43 and
$3.81 for the years ended December 31, 1998, 1999 and 2000, respectively. Such
pro forma results are not representative of the effects on operations for
future years.



F-15
41


COSTAR GROUP, INC.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)

10. EMPLOYEE BENEFIT PLANS (CONTINUED)

The weighted average fair value of options granted during 1998 was $6.63
using the Black-Scholes option-pricing model with the following assumptions:
dividend yield 0%, expected volatility of 94%, risk-free interest rate of 5.7%,
and expected life of five years. The weighted average fair value of options
granted during 1999 was $19.60 using the Black-Scholes option-pricing model with
the following assumptions: dividend yield 0%, expected volatility of 90%,
risk-free interest rate of 5.0%, and expected life of five years. The weighted
average fair value of options granted during 2000 was $20.44 using the
Black-Scholes option-pricing model with the following assumptions: dividend
yield 0%, expected volatility of 87%, risk-free interest rate of 6.3%, and
expected life of five years.

The following table summarizes information regarding options outstanding
at December 31, 2000:


<TABLE>
<CAPTION>
OPTIONS OUTSTANDING OPTIONS EXERCISABLE
-------------------------------------------- --------------------------
WEIGHTED-
AVERAGE
REMAINING WEIGHTED- WEIGHTED-
NUMBER OF CONTRACTUAL LIFE AVERAGE NUMBER OF AVERAGE
EXERCISE PRICE SHARES (IN YEARS) EXERCISE PRICE SHARES EXERCISE PRICE
-------------- --------- ---------------- -------------- --------- --------------
<S> <C> <C> <C> <C> <C>
$ 3.45 - $ 3.45............ 193,254 3.9 $ 3.45 193,254 $ 3.45
$ 4.07 - $ 8.75............ 68,791 5.9 7.13 65,790 7.08
$ 8.88 - $ 9.00............ 209,636 7.5 9.00 166,960 9.00
$12.63 - $22.63............ 214,307 8.5 19.62 38,350 18.14
$22.75 - $24.88............ 277,735 9.3 23.95 34,479 23.54
$25.00 - $29.63............ 121,250 8.9 27.84 8,064 28.92
$30.00 - $30.00............ 215,834 8.3 30.00 140,832 30.00
$30.38 - $32.44............ 199,750 9.0 31.19 13,998 31.47
$32.50 - $52.13............ 216,400 9.2 36.29 25,160 39.02
--------- --------
1,716,957 8.0 22.05 686,887 14.59
========= ========
</TABLE>

Employee 401(k) Plan

The Company maintains a defined contribution retirement plan for all
eligible employees. Effective January 1, 1997, the Company established a 401(k)
Plan (the "401(k)") to provide retirement benefits for eligible employees. The
401(k) provides for tax deferred contributions of between 1% and 15% of
employees' salaries, limited to a maximum annual amount as established by the
Internal Revenue Service. The Company matched 25% in 1998, and 100% in 1999 and
2000 of employee contributions up to a maximum of 6% of total compensation.
Amounts contributed to the 401(k) by the Company to match employee contributions
for the years ended December 31, 1998, 1999, and 2000 were approximately
$39,000, $364,000 and $698,000, respectively.



11. QUARTERLY FINANCIAL DATA (UNAUDITED)

The following table has been prepared from the financial records of the
Company, without audit, and reflects all adjustments that are, in the opinion of
management, necessary for a fair presentation of the results of operations for
the interim periods presented (in thousands, except per share amounts). The sum
of the per share amounts do not equal the annual amounts presented in the
audited financial statements because of the changes in the weighted-average
number of shares outstanding during the year.


<TABLE>
<CAPTION>

1999 2000
--------------------------------------------------------------------------------
MAR. 31 JUNE 30 SEPT. 30 DEC. 31 MAR.31 JUNE 30 SEPT. 30 DEC. 31
------- -------- -------- ------ ------- ------- -------- --------
(IN THOUSANDS)
<S> <C> <C> <C> <C> <C> <C> <C> <C>
Revenues................................ $ 6,127 $ 7,178 $ 8,021 $ 8,908 $11,372 $14,572 $ 15,717 $16,841
Cost of revenues........................ 2,594 3,068 3,616 3,965 5,977 7,730 8,356 8,139
------- ------- ------- ------- ------- ------- ------- --------
Gross margin............................ 3,533 4,110 4,405 4,943 5,395 6,842 7,361 8,702
Operating expense....................... 5,759 7,352 8,898 10,364 22,090 21,571 20,261 19,413
------- ------- ------- ------- ------- ------- ------- --------
Loss from operations.................... (2,226) (3,242) (4,493) (5,421) (16,695) (14,729) (12,900) (10,711)
Other income (expense), net............. 62 616 1,234 1,193 1,026 751 807 751
Income tax benefit...................... -- -- -- -- 565 845 523 112
------- ------- ------- ------- ------- ------- ------- --------
Net loss................................ $(2,164) $(2,626) $(3,259) $(4,228) $(15,104) $(13,133) $(11,570) $( 9,848)
======= ======= ======= ======= ======= ======= ======= ========
Net loss per share - basic and diluted.. $( 0.22) $( 0.23) $( 0.25) $( 0.33) $( 1.06) $( 0.85) $( 0.75) $ ( 0.64)
======= ======= ======= ======= ======= ======= ======= ========

</TABLE>


F-16
42


INDEX TO EXHIBITS

<TABLE>
<CAPTION>
EXHIBIT NO. DESCRIPTION
- ----------- -----------
<S> <C>

2.1 Agreement and Plan of Merger by and among CoStar Group, Inc., COMPS.COM,
Inc., and Acq Sub, Inc., dated as of November 3, 1999 (Incorporated by
reference to Exhibit 2.1 to the Current Report of the Registrant on Form
8-K (File No. 0-24531) filed with the Commission on November 17, 1999).

2.2 Side Letter, dated February 10, 2000, by and between CoStar Group, Inc.
and Christopher Crane (Incorporated by reference to Exhibit 2.2 to the
Registrant's Report on Form 10-Q dated March 31, 2000).

3.1 Restated Certificate of Incorporation (Incorporated by reference to
Exhibit 3.1 to Amendment No. 4 to the Registration Statement on Form S-1
of the Registrant (Reg. No. 333-47953) filed with the Commission on June
30, 1998 (the "1998 Form S-1")).

3.2 Certificate of Amendment of Restated Certificate of Incorporation
(Incorporated by reference to Exhibit 3.1 to the Registrant's Report on
Form 10-Q dated June 30, 1999).

3.3 Amended and Restated By-Laws (Incorporated by reference to Exhibit 3.2
to the 1998 Form S-1).

4.1 Specimen Common Stock Certificate (Incorporated by reference to Exhibit
4.1 to the Registrant's Report on Form 10-K for the year ended December
31, 1999 (the "1999 10-K")).

*10.1 CoStar Group, Inc. 1998 Stock Incentive Plan, as amended (Incorporated
by reference to Exhibit 10.1 to the Registrant's Report on Form 10-Q
dated June 30, 2000).

*10.2 Employment Agreement for Andrew C. Florance (Incorporated by reference
to Exhibit 10.2 to the 1998 Form S-1).

*10.3 Employment Agreement for Frank A. Carchedi (Incorporated by reference to
Exhibit 10.3 to the 1998 Form S-1).

*10.4 Employment Agreement for David M. Schaffel (Incorporated by reference to
Exhibit 10.4 to the 1998 Form S-1).

*10.5 Employment Agreement for John Place (Incorporated by reference to
Exhibit 10.2 to the Registrant's Report on Form 10-Q dated June 30,
2000).

*10.6 Employment Agreement for Larry Dressel (Incorporated by reference to
Exhibit 10.1 to the Registrant's Report on Form 10-Q dated September 30,
2000).

*10.7 Employment Terms for Craig Farrington (filed herewith).

10.8 Registration Rights Agreement (Incorporated by reference to Exhibit 10.7
to the 1998 Form S-1).

10.9 Office Lease dated August 12, 1999 between CoStar Realty Information,
Inc. and Newlands Building Ventures, LLC (Incorporated by reference to
Exhibit 10.2 to the Registrant's Report on Form 10-Q dated September 30,
1999).

10.10 Office Building Lease, dated January 31, 1999, between Comps, Inc. and
Comps Plaza Associates, L.P. (Incorporated by reference to Exhibit 10.14
to the Registration Statement of Comps on Form S-1 (Reg. No. 333-72901)
filed with the Commission on April 5, 1999 (the "Comps Form S-1")).

10.11 First Amendment to Lease, dated March 22, 1999, between Comps, Inc. and
Comps Plaza Associates, L.P. (Incorporated by reference to Exhibit
10.14.1 to the Comps Form S-1).

10.12 Sublease Agreement, dated June 28, 1999, between Comps, Inc. and Pulse
Engineering, Inc. (Incorporated by reference to Exhibit 10.11 to the
1999 10-K).

21.1 Subsidiaries of the Registrant (filed herewith).
</TABLE>
43


<TABLE>
<S> <C>
23.1 Consent of Independent Auditors (filed herewith).

24.1 Powers of Attorney (Included in the Signature Pages to the Report).

</TABLE>

* Management Contract or Compensatory Plan or Arrangement