REALTY INFORMATION GROUP INC
424B4, 1999-05-05
COMPUTER PROCESSING & DATA PREPARATION
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<PAGE>   1
                                            Filed Pursuant to Rule 424(b)(4)
                                            Registration Statement No. 333-74953
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PROSPECTUS
MAY 5, 1999             [REALTY INFORMATION GROUP LOGO]            [COSTAR LOGO]
 
                        3,350,000 SHARES OF COMMON STOCK
 
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REALTY INFORMATION GROUP, INC.:
 
- - Through the CoStar(TM) group of services, we are the largest digital provider
  of commercial real estate information and analysis.
 
- - We are creating a digital marketplace for the commercial real estate and
  related business community to exchange information, evaluate opportunities
  using national standardized data, and interact with each other on a continuous
  basis.
 
- - Realty Information Group, Inc.
  7475 Wisconsin Avenue
  Bethesda, Maryland 20814
  (301) 215-8300
 
- - NASDAQ SYMBOL: RIGX
 
THE OFFERING:
 
- - We are offering 2,750,000 of the shares, and existing stockholders are
  offering 600,000 of the shares.
 
- - The underwriters have an option to purchase an additional 502,500 shares from
  us and from existing stockholders to cover over-allotments.
 
- - There is an existing trading market for these shares. The reported last sales
  price on May 4, 1999 was $34 5/8 per share.
 
- - We plan to use the proceeds from this offering 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.
 
- - Closing: May 10, 1999.
 
<TABLE>
<CAPTION>
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                                                              PER SHARE      TOTAL
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<S>                                                           <C>         <C>
Public offering price:                                         $34.50     $115,575,000
Underwriting fees:                                               1.90        6,365,000
Proceeds to Realty Information Group:                           32.60       89,650,000
Proceeds to selling stockholders:                               32.60       19,560,000
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</TABLE>
 
  THIS INVESTMENT INVOLVES RISK. SEE "RISK FACTORS" BEGINNING ON PAGE 5.
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Neither the Securities and Exchange Commission nor any state securities
commission has approved or disapproved of these securities or determined if this
prospectus is truthful or complete. Any representation to the contrary is a
criminal offense.
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DONALDSON, LUFKIN & JENRETTE                                      BT ALEX. BROWN
                                ALLEN & COMPANY
                                  INCORPORATED
 
             The undersigned is facilitating Internet distribution.
                                 DLJDIRECT INC.
<PAGE>   2
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                              PAGE
                                                              ----
<S>                                                           <C>
Prospectus Summary..........................................    1
Risk Factors................................................    5
Use of Proceeds.............................................   11
Price Range of Common Stock.................................   11
Dividend Policy.............................................   12
Corporate Information.......................................   12
Capitalization..............................................   13
Dilution....................................................   14
Selected Consolidated Financial and Operating Data..........   15
Management's Discussion and Analysis of Financial Condition
  and Results of Operations.................................   16
Business....................................................   25
Management..................................................   38
Principal and Selling Stockholders..........................   45
Certain Transactions........................................   46
Description of Capital Stock................................   47
Underwriting................................................   49
Legal Matters...............................................   51
Experts.....................................................   51
Additional Information......................................   51
Index to Consolidated Financial Statements..................  F-1
</TABLE>
 
                                        i
<PAGE>   3
 
                               PROSPECTUS SUMMARY
 
     The following summary highlights the key information contained in this
prospectus. It does not contain all the information that may be important to
you. You should read the entire prospectus, especially the discussion of "Risk
Factors" and the Consolidated Financial Statements and Notes, before deciding to
invest in shares of our common stock.
 
                                  OUR BUSINESS
 
     Realty Information Group, Inc. is the nation's largest digital provider of
commercial real estate information and analysis. 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, including, in 1998:
 
     - leasing transactions with an aggregate value of more than $200 billion;
 
     - sales transactions with an aggregate value of more than $250 billion; and
 
     - commercial construction starts with an aggregate value of more than $50
       billion.
 
     To facilitate transactions, industry participants must have daily access to
current data such as rental rates, vacancy rates, and space availability to
carry out their businesses effectively. Historically, such data collection has
been time-consuming and inefficient. Therefore, there is a need to develop an
efficient marketplace, where members of the commercial real estate and related
business community can exchange information, evaluate opportunities using
national standardized data, and interact with each other on a continuous basis.
 
     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. In 1998 we helped to facilitate 100,000 commercial lease and sales
transactions aggregating over $100 billion in value, according to our estimates.
We have three assets that we believe provide a unique foundation for this
marketplace:
 
     - the only comprehensive, proprietary, national database in the industry;
 
     - the largest research department in the industry; and
 
     - the largest number of participating organizations.
 
     We have spent over a decade constructing our database. Our research
department now makes over 1.8 million updates to the database each year. We also
have obtained and assimilated over 50 proprietary databases from other
companies. The database:
 
     - covers 35 of the top 40 commercial real estate markets in the United
       States;
 
     - tracks over 13 billion square feet in over 272,000 properties, including
       more than $25 billion in properties for sale, and over 310,000 tenants;
 
     - allows approximately 36,000 participating companies to distribute
       information on their properties; and
 
     - services our approximately 2,800 clients, representing 20,000 end-users.
                                        1
<PAGE>   4
 
     We deliver substantially all our current services digitally, and about 65%
of our clients currently receive daily service updates via the Internet. We are
in the process of making substantially all our services accessible through a
standard Web-browser format. We currently offer or are developing the following
CoStar group of services:
 
     - CoStar (Office and Industrial) provides the tools to research leasing
       options, analyze market conditions and competitive property positions,
       market properties, and produce multimedia client presentations.
 
     - CoStar Tenant delivers detailed information profiling the tenants
       occupying commercial buildings by tracking over 310,000 tenants in 23
       U.S. markets.
 
     - CoStar Advertising provides digital marketing opportunities to reach the
       CoStar marketplace through premium high-exposure banner ads on CoStar and
       our Website.
 
     - CoStar News dispatches late-breaking commercial real estate news such as
       major deals signed, acquisitions, ground breakings, and other features.
 
     - CoStar Analytic will be an enhanced Web-based analytic tool providing
       sophisticated market analysis. Jamison Advisory, CoStar, and CoStar
       Tenant already provide a full line of detailed analytical tools and
       reports.
 
     - CoStar Exchange will distribute information on over 25,000 commercial
       properties for sale with a combined asset value in excess of $25 billion
       through a secure Web service.
 
     - CoStar Comparables will be an enhanced Web-based service providing
       confirmed commercial real estate sales information on properties which
       have been sold in the major U.S. markets.
 
     Our objective is to complete the development of the CoStar digital
marketplace for the commercial real estate and related business community across
the United States and in select international markets. The principal components
of our strategy to accomplish this are to:
 
     - introduce new and upgraded services;
 
     - increase penetration in current markets;
 
     - enter new U.S. markets and develop national accounts;
 
     - expand internationally;
 
     - improve and enhance the CoStar marketplace; and
 
     - pursue strategic acquisitions.
                                        2
<PAGE>   5
 
                                  THE OFFERING
 
     The following information about shares outstanding is as of April 1, 1999.
The following information does not include:
 
     - up to 502,500 shares of common stock (which consists of 269,495 shares
       issuable by us and 233,005 shares to be sold by existing stockholders) if
       the underwriters exercise their option to cover over-allotments;
 
     - approximately 2,056,000 shares reserved for issuance under our stock
       plans, of which 1,042,494 are subject to outstanding options; or
 
     - 45,450 shares reserved for issuance upon exercise of warrants at an
       exercise price of $8.10.
 
Common stock offered:
 
  By us..........................     2,750,000 shares
 
  By selling stockholders........       600,000 shares
 
     Total.......................     3,350,000 shares
 
Common stock to be outstanding
after this offering..............    12,535,729 shares
 
Use of proceeds..................    We intend to use the net proceeds of
                                     approximately $88.7 million that we will
                                     receive from this offering 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.
 
Nasdaq National Market symbol....    RIGX
                                        3
<PAGE>   6
 
               SUMMARY CONSOLIDATED FINANCIAL AND OPERATING DATA
         (IN THOUSANDS, EXCEPT PER SHARE DATA AND OTHER OPERATING DATA)
 
     You should read the following summary consolidated financial data together
with "Management's Discussion and Analysis of Financial Condition and Results of
Operations" and the Consolidated Financial Statements and accompanying Notes
that appear later in this prospectus. As explained in the Notes to the
Consolidated Financial Statements, we derive the financial data for 1994 through
1998 from audited financial statements of us and of our predecessor companies
for those years. The pro forma 1998 data reflects our January 1999 acquisitions
of LeaseTrend, Inc. and Jamison Research, Inc. The pro forma as adjusted balance
sheet data further reflects the application of the net proceeds from the sale of
2,750,000 shares of common stock in this offering at the offering price of
$34 1/2 per share. See "Capitalization" and "Use of Proceeds."
 
<TABLE>
<CAPTION>
                                                           YEARS ENDED DECEMBER 31,
                                          -----------------------------------------------------------
                                                                                           PRO FORMA
                                           1994     1995     1996      1997      1998        1998
                                          ------   ------   -------   -------   -------   -----------
                                                                                          (UNAUDITED)
<S>                                       <C>      <C>      <C>       <C>       <C>       <C>
STATEMENT OF OPERATIONS DATA:
  Revenues..............................  $1,420   $2,062   $ 4,336   $ 7,900   $13,900     $21,923
  Cost of revenues......................     591      931     2,188     3,413     4,562       8,210
                                          ------   ------   -------   -------   -------     -------
  Gross margin..........................     829    1,131     2,148     4,487     9,338      13,713
  Operating expenses....................     990    1,994     4,829     7,786    12,864      20,465
                                          ------   ------   -------   -------   -------     -------
  Loss from operations..................    (161)    (863)   (2,681)   (3,299)   (3,526)     (6,752)
  Other income (expense), net...........     (76)      79        49        33       341          96
                                          ------   ------   -------   -------   -------     -------
  Net loss..............................  $ (237)  $ (784)  $(2,632)  $(3,266)  $(3,185)    $(6,656)
                                          ======   ======   =======   =======   =======     =======
  Net loss per share - basic and
     diluted............................  $(0.09)  $(0.22)  $ (0.60)  $ (0.57)  $ (0.44)    $ (0.76)
                                          ======   ======   =======   =======   =======     =======
  Weighted average shares outstanding...   2,609    3,635     4,388     5,722     7,213       8,771
                                          ======   ======   =======   =======   =======     =======
</TABLE>
 
<TABLE>
<CAPTION>
                                                                    AS OF DECEMBER 31, 1998
                                                              -----------------------------------
                                                                                       PRO FORMA
                                                              ACTUAL     PRO FORMA    AS ADJUSTED
                                                              -------   -----------   -----------
                                                                        (UNAUDITED)   (UNAUDITED)
<S>                                                           <C>       <C>           <C>
BALANCE SHEET DATA:
  Cash......................................................  $19,667     $ 9,664      $ 98,314
  Working capital...........................................   16,900       5,561        94,211
  Total assets..............................................   27,541      38,439       127,089
  Total liabilities.........................................    4,338       5,726         5,726
  Stockholders' equity......................................   23,203      32,713       121,363
</TABLE>
 
<TABLE>
<CAPTION>
                                                             AS OF DECEMBER 31,
                                         ----------------------------------------------------------
                                                                                         PRO FORMA
                                          1994     1995     1996     1997      1998        1998
                                         ------   ------   ------   -------   -------   -----------
<S>                                      <C>      <C>      <C>      <C>       <C>       <C>
OTHER OPERATING DATA:
  Markets Covered by Database..........       3        4        9        14        19          40
  Counties Covered by Database.........      16       42       56       120       136         302
  Number of Clients....................      88      204      542     1,123     1,731       2,441
  Billions of Square Feet in
     Database..........................     1.3      2.2      3.3       6.5       9.1        12.7
  Buildings in Database................  12,775   24,822   43,520   112,335   175,471     261,108
  Images in Database...................  15,459   24,926   47,308    90,545   178,827     227,598
</TABLE>
 
                                        4
<PAGE>   7
 
                                  RISK FACTORS
 
     A purchase of our common stock involves risks. We list below some risks
that could harm our business, financial condition, operating results, and stock
price. Other risks that we cannot now foresee might also hurt us. You should
carefully consider these factors and the other information in this prospectus in
evaluating Realty Information Group, Inc. and deciding whether to purchase our
common stock.
 
     This prospectus contains statements about the future regarding business
strategies, market potential, future financial performance, and other matters.
We also use in this prospectus the words "intends to", "anticipates", "expects",
and similar expressions to identify these types of "forward-looking" statements.
Many risks and uncertainties, including those described below, could cause our
actual results to differ materially from our forward-looking statements.
 
OUR FUTURE PROFITABILITY IS UNCERTAIN DUE TO CONTINUING OPERATING LOSSES
 
     We have never recorded an overall operating profit because our investment
in geographic expansion and new services has exceeded the profits generated in
our established markets. Our accumulated deficit was $14.6 million as of
December 31, 1998. We intend to continue to invest in expansion and new services
and will therefore sustain substantial losses for the next several years. Our
ability to earn an overall profit will largely depend on our ability to generate
profits from services that exceed our investment in geographic expansion and new
services. 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:
 
     - our investments in geographic expansion;
 
     - the timing of new service introductions and enhancements;
 
     - the timing of investing the net proceeds from this offering;
 
     - acquisitions of other companies or assets;
 
     - sales and marketing promotional activities;
 
     - loss of clients or revenues due to consolidation in the real estate
       industry;
 
     - changes in client budgets; or
 
     - our investments in other corporate resources.
 
WE MAY NOT BE ABLE TO COMPLETE SUCCESSFULLY OUR PLANNED EXPANSION
 
     Our future business and financial success will depend on our ability to
continue to expand the services we offer and the areas where we do business.
These expansion efforts must occur while information technology is rapidly
changing. These efforts impose additional burdens on our research, systems
development, sales, and general managerial resources. We may not be able to
manage this
 
                                        5
<PAGE>   8
 
growth successfully. The continued expansion efforts on which our future growth
depends have inherent risks, such as the following:
 
     - Any new or enhanced services we develop might not meet the increasingly
       sophisticated needs of our current or potential clients.
 
     - We might not succeed in developing new or enhanced services at all.
 
     - We might not succeed in entering new geographical markets.
 
     For example, our planned CoStar Exchange service may not be commercially
viable if we are unable to obtain key data on net operating income of buildings
in the database.
 
OUR BUSINESS COULD BE HARMED IF WE ARE UNABLE TO MAINTAIN THE INTEGRITY AND
RELIABILITY OF OUR DATA
 
     Our success greatly depends on our clients' confidence in the
comprehensiveness, accuracy, and reliability of the data we provide. We believe
that we take adequate precautions to safeguard the completeness and accuracy of
our data and that the information is generally current, comprehensive, and
accurate. But the task of establishing and maintaining such quality while we
grow is challenging. We cannot guarantee that we can sustain those efforts. If
we cannot maintain the quality of our data, we could experience reduced demand
for our services and could be exposed to lawsuits claiming damages resulting
from inaccurate data.
 
OUR INCREASING USE OF THE INTERNET AND THE WORLD WIDE WEB EXPOSES US TO
REGULATORY AND OTHER UNCERTAINTIES
 
     About 65% of our clients currently receive their CoStar data via the
Internet. We are in the process of making substantially all our services
accessible through a standard Web-browser format. 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 Website or in our Internet communications.
 
UNSATISFACTORY INTERNET PERFORMANCE, INTERRUPTION, OR FAILURE COULD ADVERSELY
AFFECT OUR BUSINESS
 
     Our business increasingly depends upon the satisfactory performance,
reliability, and availability of our Website, the Internet, and the World Wide
Web. Problems with the Internet or Web may impede the development of our
business for a number of reasons. If the number of Internet users or their use
of Internet resources continues to grow, it may overwhelm the existing Internet
infrastructure. 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.
 
                                        6
<PAGE>   9
 
TEMPORARY OR PERMANENT OUTAGES OF OUR COMPUTERS AND SOFTWARE OR
TELECOMMUNICATIONS EQUIPMENT COULD ADVERSELY AFFECT 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, and telecommunications failures. Any
temporary or permanent loss of one or more of these systems or facilities from
an accident, an equipment malfunction, or some other cause could harm our
business. Our core computer services and networking equipment are located in a
climate-controlled, fire and security-protected central location. We keep
off-site backup copies of all data contained in our database, maintain a back-up
power supply and equipment, and stockpile spare parts. Such measures may not,
however, adequately protect us.
 
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 and copyright laws, nondisclosure and other
contractual provisions, and technical measures to protect our intellectual
property rights. We believe we have succeeded to date in protecting our
intellectual property, but we cannot guarantee that we will continue to succeed
in that effort. Our business could be significantly harmed if we do not succeed
in protecting our 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 might become involved,
either as a plaintiff or as a defendant, could cost us much time and money.
 
INTERNATIONAL EXPANSION MAY RESULT IN NEW BUSINESS RISKS
 
     Our planned international operations could subject us to new business
risks, including:
 
     - adapting to the differing business practices 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.
 
WE MAY NOT SUCCEED IN INTEGRATING ACQUISITIONS
 
     We intend to continue to make strategic acquisitions as part of expansion
of our markets and service lines. Acquisitions involve many risks beyond the
inherent risks in entering new markets. For example:
 
     - We may lose key employees or clients of the acquired companies.
 
     - We may experience problems in integrating the employees of the acquired
       companies.
 
     - We may have difficulty in integrating the acquired companies' services.
 
                                        7
<PAGE>   10
 
     Any future acquisitions could also dilute the equity interests of our
stockholders, require us to borrow money, require us to write off assets for
accounting purposes, or create other undesirable accounting issues such as
significant expenses for amortization of goodwill or other intangible assets.
 
     We recently completed two major acquisitions. We cannot guarantee that we
will be able to profitably manage or successfully integrate these acquired
businesses.
 
OUR BUSINESS DEPENDS ON RETAINING AND ATTRACTING HIGHLY CAPABLE MANAGEMENT AND
OPERATING PERSONNEL
 
     Our success depends in large part on whether we can retain and attract
management and operating personnel, including our President and Chief Executive
Officer, Andrew C. Florance. We require highly skilled technical, sales,
management, Web-development, marketing, and research personnel, who are in high
demand and are often subject to competing offers. Because we plan to expand
rapidly, we will continue to need an increased number of management and support
personnel. To retain and attract key personnel, we use various measures,
including multi-year employment agreements containing confidentiality and
non-competition agreements, a stock option plan, and incentive bonuses for key
executive officers. We are the beneficiary of a $1.0 million key person life
insurance policy on Mr. Florance. 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 employees.
 
COMPETITION COULD RENDER OUR SERVICES UNCOMPETITIVE
 
     The market for information systems and services in general is highly
competitive and rapidly changing. We believe we do not currently face any
national competitor in providing our services to the commercial real estate and
related business community, although we do face such competition on a local and
regional basis. The new services we are developing will bring us into further
competition with various companies. Additional competitors may also enter the
market and competition may intensify. Although we believe our services are
better than those offered by our competitors, they may be able to narrow or
eliminate the differences.
 
CYCLICAL DOWNTURNS AND CONSOLIDATION IN THE COMMERCIAL REAL ESTATE INDUSTRY
COULD ADVERSELY AFFECT OUR BUSINESS
 
     Our business depends on conditions in the commercial real estate industry,
including businesses that supply or invest in that industry. Changes in the
commercial real estate market may affect demand for our services. The
traditional economic downturns in the commercial real estate industry could harm
our business. These changes could decrease our 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. Each of these factors could
adversely affect our business.
 
ADDITIONAL REQUIRED CAPITAL MAY NOT BE AVAILABLE
 
     To date, we have financed our operations through cash from profitable
operations in our established markets, the sale of our stock, and by 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 more money, we will have to pay interest and may also
have to agree to
 
                                        8
<PAGE>   11
 
restrictions that 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 them only
on unattractive terms.
 
PROBLEMS WITH OUR SOFTWARE COULD IMPAIR USE OF OUR SERVICES
 
     The software underlying our services is complex and may contain undetected
errors. We have previously discovered errors in the software that we have
developed. 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 BE ADVERSELY AFFECTED BY THE YEAR 2000 PROBLEM
 
     We have identified certain Year 2000 risks with respect to our LeaseTrend,
Inc. and Jamison Research, Inc. subsidiaries, but believe efforts now underway
will resolve those issues. In addition, we expect to complete in the next
several months upgrades and replacements of various internal software
applications, operation systems, and hardware devices, which will provide
greater assurance of Year 2000 compliance. However, if any of our systems are
not Year 2000 compliant or if our clients, suppliers, or other persons with whom
we deal fail to achieve Year 2000 compliance, we may experience various adverse
consequences, such as the following:
 
     - We may be unable to maintain and update the database on which our
       services depend.
 
     - We may experience difficulties in marketing our services to clients and
       potential clients.
 
     - Our clients may experience delays or outages in receiving our services.
 
For a description of our Year 2000 compliance efforts, you should read
"Management's Discussion and Analysis of Financial Condition and Results of
Operations -- Impact of the Year 2000."
 
OUR STOCK PRICE MAY BE ADVERSELY AFFECTED BY MARKET VOLATILITY
 
     The trading price of our common stock has fluctuated widely in the past
and, 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. Such 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.
 
                                        9
<PAGE>   12
 
THE NUMBER OF SHARES AVAILABLE FOR SALE AFTER THIS OFFERING COULD CAUSE OUR
STOCK PRICE TO DECLINE
 
     Sales of substantial amounts of our common stock after this offering by
persons who previously invested in us could cause the market price of our common
stock to decline. A total of 6,310,729 shares of common stock owned by our
directors, officers, and other stockholders will become potentially available
for sale in the public market when certain agreements between those stockholders
and the underwriters expire. Those sales would be subject to certain limits
under the federal securities laws. We have granted some of our stockholders
rights concerning the registration of their shares under the Securities Act.
Holders with these rights could cause a large number of shares to be registered
and to become freely tradeable.
 
STOCK OWNERSHIP BY EXECUTIVE OFFICERS AND DIRECTORS PROVIDES SUBSTANTIAL
INFLUENCE OVER MATTERS REQUIRING A VOTE OF STOCKHOLDERS
 
     Immediately after this offering is completed, our executive officers and
directors, and entities affiliated with them, will, in the aggregate,
beneficially own approximately 30.7% of our outstanding common stock. As a
result, these stockholders, if they act together, could 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.
 
OUR CHARTER DOCUMENTS CONTAIN PROVISIONS THAT COULD IMPEDE THIRD PARTY
ACQUISITIONS
 
     Our governing corporate documents contain provisions that could discourage
potential takeover attempts and make attempts by our stockholders to change
management more difficult. These provisions include:
 
     - a requirement that our stockholders give us advance notice of certain
       nominations for our Board of Directors and of new business for any
       stockholder meeting;
 
     - a prohibition on stockholders' calling special meetings; and
 
     - a prohibition on stockholder action by written consent.
 
     Our certificate of incorporation also allows the Board to issue up to
2,000,000 shares of preferred stock and to fix the rights of those shares
without a vote by the stockholders. The rights of holders of common stock may be
harmed by the rights of the holders of any such "blank check" preferred stock.
We do not, at present, intend to issue any preferred stock but, if we do, an
outside party may find it more difficult to acquire a majority of our
outstanding voting stock. In addition, we are subject to the anti-takeover
provisions of Section 203 of the Delaware General Corporation Law. Applying
these provisions could delay or prevent a change in control of us, which could
adversely affect the market price of our common stock.
 
YOU WILL EXPERIENCE IMMEDIATE AND SUBSTANTIAL DILUTION
 
     The price of our common stock in the offering is substantially higher than
the book value per share of our outstanding common stock. As a result,
purchasers of common stock in the offering will experience immediate and
substantial dilution of $26.40 per share (at the offering price of $34.50 per
share). Those purchasers will incur additional dilution if outstanding options
and warrants allowing purchase of common stock at prices below the offering
price are exercised.
 
                                       10
<PAGE>   13
 
                                USE OF PROCEEDS
 
     The net proceeds we will receive from the sale of the 2,750,000 shares of
common stock we are offering, at the offering price of $34 1/2 per share, will
be approximately $88.7 million ($97.4 million if the underwriters'
over-allotment option is exercised in full), after deducting estimated
underwriting discounts and commissions and our estimated offering expenses. We
expect to use these 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.
 
We will not receive any proceeds from the sale of common stock by existing
stockholders. The amounts actually spent by us for any specific purpose may vary
significantly and will depend on a number of factors, including our future
revenues and the various uncertainties about our business described under "Risk
Factors." Accordingly, our management has broad discretion in the allocation of
the net proceeds. Pending such uses, the net proceeds of this offering will be
invested in short-term, interest-bearing investment-grade securities.
 
                          PRICE RANGE OF COMMON STOCK
 
     Our common stock is traded on the Nasdaq National Market under the symbol
"RIGX." Public trading of our common stock began on July 1, 1998. Prior to that,
there was no public market for the common stock. The following table sets forth,
for the periods indicated, the high and low sale price per share of our common
stock on the Nasdaq National Market.
 
<TABLE>
<CAPTION>
                                                                   HIGH       LOW
                                                                   ----       ---
<S>                                                                <C>        <C>
YEAR ENDED DECEMBER 31, 1998
  Third Quarter (from July 1, 1998).........................       $10 7/8    $ 5 1/2
  Fourth Quarter............................................       $14        $ 6
YEAR ENDED DECEMBER 31, 1999
  First Quarter.............................................       $29 1/4    $12 5/8
  Second Quarter (through May 4, 1999)......................       $48 5/8    $28 1/2
</TABLE>
 
     As of April 1, 1999, there were 84 holders of record of our common stock.
On May 4, 1999, the last sale price reported on the Nasdaq National Market for
our common stock was $34 5/8 per share.
 
                                       11
<PAGE>   14
 
                                DIVIDEND POLICY
 
     We have never declared or paid any dividends on our common stock. We do not
plan to do so for the foreseeable future. Instead, we intend to invest any
earnings in our business. The holders of our common stock are entitled to
receive ratably any dividends that the Board of Directors declares. The Board
will determine the payment of future dividends on the common stock and the rate
of dividends, if any, in light of:
 
     - any applicable contractual restrictions limiting our ability to pay
       dividends;
 
     - our earnings;
 
     - our financial condition;
 
     - our capital requirements; and
 
     - other factors that the Board deems relevant.
 
                             CORPORATE INFORMATION
 
     Our headquarters is located at 7475 Wisconsin Avenue, Bethesda, Maryland
20814. Our telephone number is (301) 215-8300. Our Website is www.rig.com.
Information contained in our Website is not a part of this prospectus. We have
filed applications to register the CoStar mark. LeaseTrend and LeaseTrend, Inc.
are registered trademarks. We also claim CoStar Office, CoStar Industrial,
CoStar Tenant, CoStar Exchange, CoStar Analytic, CoStar Comparables, CoStar
Advertising, CoStar News, E-Brochure, Real-E News, and CrosTrac as our marks.
Other persons own other trademarks and trade names mentioned in this prospectus.
 
                                       12
<PAGE>   15
 
                                 CAPITALIZATION
 
     The following table sets forth our capitalization as of December 31, 1998:
 
     - on an actual basis;
 
     - on a pro forma basis reflecting our January 1999 acquisitions of Jamison
       Research, Inc. and LeaseTrend, Inc.; and
 
     - on a pro forma basis as adjusted to give effect to our receipt of the net
       proceeds from our sale of the 2,750,000 shares of common stock we offer
       in this prospectus at the offering price of $34 1/2 per share.
 
You should read this table together with the Consolidated Financial Statements
and accompanying Notes that we include later in this prospectus.
 
<TABLE>
<CAPTION>
                                                               AS OF DECEMBER 31, 1998
                                                          ----------------------------------
                                                                                  PRO FORMA
                                                           ACTUAL    PRO FORMA   AS ADJUSTED
                                                          --------   ---------   -----------
                                                                    (IN THOUSANDS)
<S>                                                       <C>        <C>         <C>
Stockholders' equity:
  Common stock, $.01 par value; 30,000,000 shares
     authorized; 8,771,027, 9,785,729, and 12,535,729
     issued and outstanding on actual, pro forma, and
     pro forma as adjusted basis, respectively..........  $     88   $     98     $    125
Additional paid-in capital..............................    37,727     47,227      135,850
Retained earnings (deficit).............................   (14,612)   (14,612)     (14,612)
                                                          --------   --------     --------
Total stockholders' equity..............................    23,203     32,713      121,363
                                                          --------   --------     --------
Total capitalization....................................  $ 23,203   $ 32,713     $121,363
                                                          ========   ========     ========
</TABLE>
 
                                       13
<PAGE>   16
 
                                    DILUTION
 
     Our pro forma net tangible book value as of December 31, 1998 was $12.9
million or approximately $1.32 per share. "As adjusted pro forma net tangible
book value" per share represents the amount of our total pro forma tangible
assets less total pro forma liabilities, divided by the number of pro forma
shares of our common stock outstanding upon completion of our offering.
 
     Our as adjusted pro forma net tangible book value as of December 31, 1998
would have been approximately $101.6 million, or $8.10 per share, after taking
into account the sale of 2,750,000 shares of common stock we are offering in
this prospectus at the public offering price of $34.50 per share and including
the estimated net proceeds we will receive.
 
     This represents an immediate increase in the as adjusted pro forma net
tangible book value of $6.78 per share to existing stockholders and an immediate
dilution of $26.40 per share to you if you purchase shares in this offering. The
following table illustrates this per share dilution:
 
<TABLE>
<S>                                                           <C>   <C>
Public offering price.......................................        $34.50
          Pro forma net tangible book value as of December
           31, 1998.........................................  1.32
          Increase attributable to new investors............  6.78
                                                              ----
Adjusted pro forma net tangible book value as of December
  31, 1998..................................................          8.10
                                                                    ------
Dilution to new investors...................................        $26.40
                                                                    ======
</TABLE>
 
     The following table summarizes, on an as adjusted pro forma basis as of
December 31, 1998, the difference between the number of shares of common stock
purchased from us, the total consideration paid, and the average price per share
paid by existing stockholders and by the new stockholders. This calculation is
made before deducting the estimated underwriting discounts and commissions and
estimated offering expenses we will pay from the public offering price of $34.50
per share.
 
     The table excludes 877,494 shares subject to outstanding options as of
December 31, 1998 at a weighted average exercise price of $6.77 per share and
approximately 2,056,000 shares we have reserved for issuance under our stock
option plans. If option holders exercise their options, there will be further
dilution to new investors. See "Management -- Employee Benefit Plans" and Note
11 of the Notes to Consolidated Financial Statements.
 
     In addition, sales by the existing stockholders in this offering will
reduce the number of shares held by existing stockholders to 9,185,729 or 73.3%
(8,952,724 shares or 69.9% if the underwriters' over-allotment option is
exercised in full), and will increase the number of shares held by new investors
to 3,350,000, or 26.7% (3,852,500, or 30.1%, if the underwriters' over-allotment
option is exercised in full), of the total number of shares of common stock
outstanding after this offering. See "Principal and Selling Stockholders."
 
<TABLE>
<CAPTION>
                                  SHARES PURCHASED          TOTAL CONSIDERATION
                                --------------------       ----------------------         PER SHARE
                                  NUMBER     PERCENT          AMOUNT      PERCENT       AVERAGE PRICE
                                ----------   -------       ------------   -------       -------------
<S>                             <C>          <C>           <C>            <C>           <C>
Existing stockholders.........   9,785,729     78.1%       $ 47,325,000     33.3%          $ 4.84
New stockholders..............   2,750,000     21.9          94,875,000     66.7           $34.50
                                ----------    -----        ------------    -----
          Totals..............  12,535,729    100.0%       $142,200,000    100.0%          $11.34
                                ==========    =====        ============    =====
</TABLE>
 
                                       14
<PAGE>   17
 
               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, 1998 and certain pro forma financial data for the year ended
December 31, 1998. We derive the Statement of Operations Data and Balance Sheet
Data we show below for 1996 through 1998 from audited financial statements that
we include later in this prospectus. We derive the financial data for 1994 and
1995 from audited financial statements for those years, which do not appear in
this prospectus. As explained in the Notes to the Consolidated Financial
Statements that appear later in this prospectus, we derive the financial data
for 1994 through 1998 from the audited financial statements of us and of our
predecessor companies for those years. The 1998 pro forma data reflects our
January 1999 Jamison and LeaseTrend acquisitions. The pro forma 1998 as adjusted
data further reflects the application of net proceeds from the sale of 2,750,000
shares of common stock in this offering at the offering price of $34 1/2 per
share.
 
<TABLE>
<CAPTION>
                                                        YEARS ENDED DECEMBER 31,
                                       -----------------------------------------------------------
                                                                                        PRO FORMA
                                        1994     1995     1996      1997      1998        1998
                                       ------   ------   -------   -------   -------   -----------
                                                                                       (UNAUDITED)
<S>                                    <C>      <C>      <C>       <C>       <C>       <C>
STATEMENT OF OPERATIONS DATA:
  Revenues...........................  $1,420   $2,062   $ 4,336   $ 7,900   $13,900     $21,923
  Cost of revenues...................     591      931     2,188     3,413     4,562       8,210
                                       ------   ------   -------   -------   -------     -------
  Gross margin.......................     829    1,131     2,148     4,487     9,338      13,713
  Operating expenses.................     990    1,994     4,829     7,786    12,864      20,465
                                       ------   ------   -------   -------   -------     -------
  Loss from operations...............    (161)    (863)   (2,681)   (3,299)   (3,526)     (6,752)
  Other income (expense), net........     (76)      79        49        33       341          96
                                       ------   ------   -------   -------   -------     -------
  Net loss...........................  $ (237)  $ (784)  $(2,632)  $(3,266)  $(3,185)    $(6,656)
                                       ======   ======   =======   =======   =======     =======
  Net loss per share - basic and
     diluted.........................  $(0.09)  $(0.22)  $ (0.60)  $ (0.57)  $ (0.44)    $ (0.76)
                                       ======   ======   =======   =======   =======     =======
  Weighted average shares
     outstanding.....................   2,609    3,635     4,388     5,722     7,213       8,771
                                       ======   ======   =======   =======   =======     =======
</TABLE>
 
<TABLE>
<CAPTION>
                                                     AS OF DECEMBER 31,
                         --------------------------------------------------------------------------
                                                                        PRO FORMA    PRO FORMA 1998
                         1994     1995     1996     1997      1998        1998        AS ADJUSTED
                         -----   ------   ------   -------   -------   -----------   --------------
                                                                       (UNAUDITED)    (UNAUDITED)
<S>                      <C>     <C>      <C>      <C>       <C>       <C>           <C>
BALANCE SHEET DATA:
  Cash.................  $ 132   $1,328   $3,326   $ 1,069   $19,667     $ 9,664        $ 98,314
  Working capital......   (332)   1,017    2,248    (1,547)   16,900       5,561          94,211
  Total assets.........    790    3,015    7,670     6,581    27,541      38,439         127,089
  Total liabilities....    727      688    2,000     3,664     4,338       5,726           5,726
  Stockholders'
     equity............     63    2,327    5,670     2,917    23,203      32,713         121,363
</TABLE>
 
<TABLE>
<CAPTION>
                                                            AS OF DECEMBER 31,
                                         --------------------------------------------------------
                                                                                        PRO FORMA
                                          1994     1995     1996     1997      1998       1998
                                         ------   ------   ------   -------   -------   ---------
<S>                                      <C>      <C>      <C>      <C>       <C>       <C>
OTHER OPERATING DATA:
  Markets Covered by Database..........       3        4        9        14        19         40
  Counties Covered by Database.........      16       42       56       120       136        302
  Number of Clients....................      88      204      542     1,123     1,731      2,441
  Billions of Square Feet in
     Database..........................     1.3      2.2      3.3       6.5       9.1       12.7
  Buildings in Database................  12,775   24,822   43,520   112,335   175,471    261,108
  Images in Database...................  15,459   24,926   47,308    90,545   178,827    227,598
</TABLE>
 
                                       15
<PAGE>   18
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     This and other sections of this prospectus contain statements about the
future regarding business strategies, market potential, future financial
performance, and other matters. We also use in this prospectus the words
"intends", "anticipates", "expects", and similar expressions to identify these
types of "forward-looking" statements. Many risks and uncertainties, including
those described below, could cause our actual results to differ materially from
our forward-looking statements.
 
OVERVIEW
 
     Realty Information Group is the nation's largest digital provider of
commercial real estate information and analysis. 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,
decision support, tenant information, property marketing, and industry news.
Substantially all our current services are digitally delivered and a majority of
our clients receive daily service updates 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.
 
     From 1994 through 1998, 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 of 1998,
we expanded into the Houston region through the acquisition of Houston-based
real estate information provider C Data Services, Inc. In January of 1999, we
expanded further by acquiring LeaseTrend, Inc. and Jamison Research, Inc., as
discussed in detail 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 each established region. As of December 31, 1998, the following
regions are those that have been in operation for more than 18 months and that
we consider to be established: Washington (includes Baltimore), Chicago, New
York (includes Northern New Jersey, Long Island, Westchester, and Connecticut),
Los Angeles (includes Orange County), San Francisco, and Philadelphia. These
regions provide us with substantial cash flow which we reinvest into the
business. Since its 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 to use a significant portion of the proceeds of this offering
for development and distribution of new services, expansion of all existing
services across current markets, and geographic expansion in the U.S. and
international markets. Therefore, while we expect operations in existing
established regions to remain profitable and provide substantial funding, we
expect our overall expansion plans to generate significant losses and negative
cash flow from operations for at least the next two years.
 
     Although our services are expanding rapidly, our CoStar service currently
generates the largest portion of our revenue. The CoStar 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
 
                                       16
<PAGE>   19
 
regularly, we charge fixed amounts rather than fees based on actual system
usage. We charge our clients based on the number of sites, organization size,
and the number of services to which a client subscribes. Our contract renewal
rate currently exceeds 90% on an annual basis. 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 prospectus, the financial data for 1996 through 1998 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,
                                           --------------------------------------------------
                                                1996              1997              1998
                                           --------------    --------------    --------------
<S>                                        <C>       <C>     <C>       <C>     <C>       <C>
Revenues.................................  $ 4,336   100%    $ 7,900   100%    $13,900   100%
Cost of revenues.........................    2,188    50       3,413    43       4,562    33
                                           -------   ---     -------   ---     -------   ---
Gross margin.............................    2,148    50       4,487    57       9,338    67
Operating expenses
     Selling and marketing...............    2,712    63       4,374    55       7,240    52
     Software development................      254     6         395     5         704     5
     General and administrative..........    1,863    43       3,017    38       4,920    35
                                           -------   ---     -------   ---     -------   ---
          Total operating expenses.......    4,829   112       7,786    98      12,864    92
                                           -------   ---     -------   ---     -------   ---
Loss from operations.....................   (2,681)  (62)     (3,299)  (41)     (3,526)  (25)
Other income (expense), net..............       49     1          33     0         341     2
                                           -------   ---     -------   ---     -------   ---
Net loss.................................  $(2,632)  (61)%   $(3,266)  (41)%   $(3,185)   (23)%
                                           =======   ===     =======   ===     =======   ===
</TABLE>
 
COMPARISON OF 1998 AND 1997
 
     Revenues.  Revenues grew 76% from $7.9 million in 1997 to $13.9 million in
1998. 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, 1998 grew from $7.9 million in 1997 to $13.1 million in 1998, an increase of
66%. During 1998, we also expanded into Houston, Sacramento, Phoenix, and San
Diego. Our advertising revenues, which we generated primarily in our established
regions, increased 139% from $405,000 in 1997 to $969,000 in 1998.
 
     Gross Margin.  Gross margin increased from $4.5 million in 1997 to $9.3
million in 1998. This increase represented an improvement from 57% to 67% of
revenues. The increase resulted principally in established regions, where
revenue growth exceeded the growth of cost of revenues, which remained
relatively constant.
 
     Selling and Marketing Expenses.  Selling and marketing expenses increased
66% from $4.4 million in 1997 to $7.2 million in 1998, but decreased as a
percentage of revenues from 55% in 1997 to 52% in 1998. Selling and marketing
expenses increased as we expanded our sales organization into new regions and
began to enhance our selling and marketing capabilities on a national basis.
 
                                       17
<PAGE>   20
 
Selling expenses declined as a percent of revenues due to sales growth during
the year and the growing renewable contract base.
 
     General and Administrative Expenses.  General and administrative expenses
increased 63% from $3.0 million in 1997 to $4.9 million in 1998, but decreased
as a percentage of revenues from 38% in 1997 to 35% in 1998. General and
administrative expenses increased because we hired new employees to support our
expanding organization and client base, and also in response to increases in our
occupancy and communication costs. General and administrative expenses decreased
as a percentage of revenues due to the continued leveraging of corporate
overhead costs over a larger organization with an expanding client base.
 
     Other Income.  Other income increased from $33,000 in 1997 to $341,000 in
1998. This increase resulted from an increase in interest income due to our
higher average cash balances in 1998, reflecting the net proceeds from our
initial public offering in July 1998.
 
COMPARISON OF 1997 AND 1996
 
     Revenues.  Revenues grew 82% from $4.3 million in 1996 to $7.9 million in
1997. This increase in revenues resulted principally from growth in our client
base in all regions of the country, expansion into new regions, and expansion of
services into existing regions. Revenues from regions we considered established
as of December 31, 1997 grew from $4.3 million in 1996 to $7.3 million in 1997,
an increase of 70%. A portion of this growth resulted from a full year of
operation in the Chicago region in 1997, which we entered on April 1, 1996, by
acquiring Chicago Resource, Inc. In 1997, we entered San Francisco through the
purchase of 99.3% of the capital stock of NMS, Inc. We also entered Philadelphia
in the first quarter of the year and Boston in the fourth quarter. Our
advertising revenues, which we generated primarily in our established regions,
increased 232% from $122,000 in 1996 to $405,000 in 1997.
 
     Gross Margin.  Gross margin increased from $2.1 million in 1996 to $4.5
million in 1997, improving from 50% to 57% of revenues. This increase resulted
principally from the expanding revenues and profitability of established
regions, including Washington, D.C., New York, Los Angeles, and Chicago.
 
     Selling and Marketing Expenses.  Selling and marketing expenses increased
61% from $2.7 million in 1996 to $4.4 million in 1997, but decreased as a
percentage of revenues from 63% in 1996 to 55% in 1997. Selling and marketing
expenses increased as we expanded our sales organization into new markets and we
invested in the development of advertising sales. Selling expenses declined as a
percentage of revenues due to sales growth during the year and the growing
renewable contract base.
 
     General and Administrative Expenses.  General and administrative expenses
increased 62% from $1.9 million in 1996 to $3.0 million in 1997, but decreased
as a percentage of revenues from 43% in 1996 to 38% in 1997. General and
administrative expenses increased as we hired new employees to support our
expanding organization and client base, and as our occupancy and communication
costs increased. General and administrative expenses decreased as a percentage
of revenues due to the continued leveraging of corporate overhead costs over a
larger organization with an expanding client base.
 
                                       18
<PAGE>   21
 
CONSOLIDATED QUARTERLY RESULTS OF OPERATIONS
 
     The following tables summarize our consolidated results of operations on a
quarterly basis for the indicated periods:
 
<TABLE>
<CAPTION>
                                                            1997                                     1998
                                           --------------------------------------   --------------------------------------
                                           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.................................  $1,555    $ 1,858    $2,074    $2,413    $2,839    $3,254    $ 3,659    $ 4,148
Cost of revenues.........................     717        937       890       869       904       968      1,248      1,442
                                           ------    -------    ------    ------    ------    ------    -------    -------
Gross margin.............................     838        921     1,184     1,544     1,935     2,286      2,411      2,706
Operating expenses.......................   1,638      1,966     1,998     2,184     2,281     2,492      3,650      4,442
                                           ------    -------    ------    ------    ------    ------    -------    -------
Loss from operations.....................    (800)    (1,045)     (814)     (640)     (346)     (206)    (1,239)    (1,736)
Other income (expense), net..............      31         17         3       (18)      (38)      (40)       202        218
                                           ------    -------    ------    ------    ------    ------    -------    -------
Net loss.................................  $ (769)   $(1,028)   $ (811)   $ (658)   $ (384)   $ (246)   $(1,037)   $(1,518)
                                           ======    =======    ======    ======    ======    ======    =======    =======
</TABLE>
 
<TABLE>
<CAPTION>
                                                               1997                                     1998
                                              --------------------------------------   --------------------------------------
                                              MAR. 31   JUNE 30   SEPT. 30   DEC. 31   MAR. 31   JUNE 30   SEPT. 30   DEC. 31
                                              -------   -------   --------   -------   -------   -------   --------   -------
                                                                    (AS A PERCENTAGE OF TOTAL REVENUES)
<S>                                           <C>       <C>       <C>        <C>       <C>       <C>       <C>        <C>
Revenues.................................       100%      100%      100%       100%      100%      100%      100%       100%
Cost of revenues.........................        46        50        43         36        32        30        34         35
                                                ---       ---       ---        ---       ---       ---       ---        ---
Gross margin.............................        54        50        57         64        68        70        66         65
Operating expenses.......................       105       106        96         91        81        77       100        107
                                                ---       ---       ---        ---       ---       ---       ---        ---
Loss from operations.....................       (51)      (56)      (39)       (27)      (13)       (7)      (34)       (42)
Other income (expense), net..............         2         1         0         (1)       (1)       (0)        6          5
                                                ---       ---       ---        ---       ---       ---       ---        ---
Net loss.................................       (49)%     (55)%     (39)%      (28)%     (14)%      (7)%     (28)%      (37)%
                                                ===       ===       ===        ===       ===       ===       ===        ===
</TABLE>
 
LEASETREND, INC. ACQUISITION
 
     On January 8, 1999, we acquired LeaseTrend, Inc., a Cincinnati-based
provider of commercial real estate information, in exchange for $4.5 million in
cash and 566,671 shares of our common stock. LeaseTrend provides information in
18 markets throughout the West, Midwest, and Florida. At the time we acquired
it, LeaseTrend served approximately 300 client firms and 3,000 users. Two
members of LeaseTrend's senior management have now joined us as Senior Vice
President and Vice President. The audited financial statements of LeaseTrend
appear later in this prospectus. For the year ended December 31, 1998,
LeaseTrend generated cash from operating activities of $211,000.
 
     As a result of acquiring LeaseTrend, we will allocate $9.8 million of the
LeaseTrend purchase price to capitalized product development costs and
intangible assets, which we will amortize using estimated useful lives of two to
ten years. The estimated charges for amortization of the LeaseTrend capitalized
product development and intangible assets are approximately $1.3 million for
each of the first two years. We expect them to decline to approximately $1.0
million or less in subsequent years. Approximately $300,000 of the amortization
in each of the first two years relates to capitalized product development, and
we will charge this to cost of sales, reducing gross margins.
 
                                       19
<PAGE>   22
 
     We will incur costs, including Year 2000 compliance costs, to integrate
LeaseTrend into our organization, including costs to:
 
     - upgrade computer systems;
 
     - establish network connections;
 
     - convert database structures;
 
     - train personnel; and
 
     - migrate LeaseTrend clients to our services.
 
Results of LeaseTrend Operations
 
     The following table provides LeaseTrend's selected results of operations
(in thousands of dollars and as a percentage of total revenue) for the indicated
periods:
 
<TABLE>
<CAPTION>
                                                                       YEARS ENDED DECEMBER 31,
                                                              ------------------------------------------
                                                                     1997                   1998
                                                              -------------------    -------------------
<S>                                                           <C>        <C>         <C>        <C>
Revenues....................................................   $2,549      100%       $3,445      100%
Cost of revenues............................................      908       36         1,311       38
                                                               ------      ---        ------      ---
Gross margin................................................    1,641       64         2,134       62
Operating expenses
     Selling, general and administrative....................    1,750       69         2,433       71
                                                               ------      ---        ------      ---
          Total operating expenses..........................    1,750       69         2,433       71
                                                               ------      ---        ------      ---
Loss from operations........................................     (109)      (5)         (299)      (9)
Other income (expense), net.................................     (369)     (14)         (433)     (12)
                                                               ------      ---        ------      ---
Net loss....................................................   $ (478)     (19)%      $ (732)     (21)%
                                                               ======      ===        ======      ===
</TABLE>
 
Comparison of 1998 and 1997 -- LeaseTrend
 
     Revenues.  LeaseTrend's revenues grew 35% from $2.5 million in 1997 to $3.4
million in 1998. This increase in revenues resulted principally from growth in
LeaseTrend's client base and expansion into new regions, including Denver,
Florida, and Raleigh.
 
     Gross Margin.  Gross margin increased from $1.6 million in 1997 to $2.1
million in 1998 due to substantial revenue growth, but declined from 64% to 62%
of revenues as a result of additional research costs for new markets.
 
     Selling, General, and Administrative.  Selling, general, and administrative
expenses increased 39% from $1.8 million in 1997 to $2.4 million in 1998, and
increased from 69% to 71% of revenues. Selling and marketing expenses increased
as LeaseTrend expanded its sales organization into new markets.
 
JAMISON RESEARCH, INC. ACQUISITION
 
     On January 22, 1999, we acquired Jamison Research, Inc., an Atlanta-based
provider of commercial real estate information, for $5.3 million in cash and
448,031 shares of our common stock. Jamison provides commercial real estate
information in the Atlanta and Dallas/Fort Worth areas.
 
                                       20
<PAGE>   23
 
Jamison's audited financial statements appear later in this prospectus. In 1998,
Jamison generated cash from operating activities of $1.2 million before
compensation to stockholders.
 
     As a result of acquiring Jamison, we will allocate the purchase price of
$10.7 million to capitalized product development costs and intangible assets,
which we will amortize using estimated useful lives of two to ten years. The
estimated charges for amortization of the Jamison capitalized product
development and intangible assets are approximately $1.4 million for each of the
first two years. We expect them to decline to approximately $1.1 million or less
in subsequent years. Approximately $400,000 of the amortization in each of the
first two years relates to capitalized product development, and we will charge
this to cost of sales, reducing gross margins.
 
     We will incur costs, including Year 2000 compliance costs, to integrate
Jamison into our organization, including costs to:
 
     - upgrade computer systems;
 
     - establish network connections;
 
     - convert database structures;
 
     - train personnel; and
 
     - migrate Jamison clients to our services.
 
We anticipate that during this period, the positive cash flow we expect from the
Jamison operations will partially offset the costs of this conversion process.
 
Results of Jamison Operations
 
     The following table provides Jamison's selected results of operations (in
thousands of dollars and as a percentage of total revenues) for the indicated
periods:
 
<TABLE>
<CAPTION>
                                                                        YEARS ENDED DECEMBER 31,
                                                              --------------------------------------------
                                                                     1997                     1998
                                                              -------------------      -------------------
<S>                                                           <C>        <C>           <C>        <C>
Revenues....................................................   $3,664     100%          $4,578      100%
Cost of revenues............................................    1,379       38           1,658       36
                                                               ------      ---          ------      ---
Gross margin................................................    2,285       62           2,920       64
Operating expenses
     Compensation to stockholders...........................      570       15           1,190       26
     Selling, general and administrative....................    1,682       46           1,887       41
                                                               ------      ---          ------      ---
          Total operating expenses..........................    2,252       61           3,077       67
                                                               ------      ---          ------      ---
Income (loss) from operations...............................       33        1            (157)      (3)
Other income (expense), net.................................      (35)      (1)            (10)      (0)
Provision for income taxes..................................       (3)      (0)             48        0
                                                               ------      ---          ------      ---
Net loss....................................................   $   (5)      (0)%        $ (119)      (3)%
                                                               ======      ===          ======      ===
</TABLE>
 
Comparison of 1998 and 1997 -- Jamison Research, Inc.
 
     Revenues.  Revenues grew 25% from $3.7 million in 1997 to $4.6 million in
1998. This increase in revenues resulted principally from growth in Jamison's
client base, primarily in the Dallas region.
 
                                       21
<PAGE>   24
 
     Gross Margin.  Gross margin increased from $2.3 million in 1997 to $2.9
million in 1998, improving from 62% to 64% of revenues. This increase resulted
principally from the expanding revenues in Dallas, where revenue growth exceeded
the growth of costs, which are primarily fixed.
 
     Selling, General, and Administrative.  Selling, general, and administrative
expenses increased 12% from $1.7 million in 1997 to $1.9 million in 1998, but
decreased as a percentage of revenues from 46% in 1997 to 41% in 1998. Selling,
general, and administrative expenses increased as Jamison completed its
expansion into Dallas, and added sales and supporting staff to the market. Due
to the expanding revenues, this declined as a percentage of sales.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Our cash balance was $19.7 million as of December 31, 1998. This
represented an increase of $18.6 million over our cash balance of $1.1 million
as of December 31, 1997. Our increased cash balance resulted principally from
the net proceeds of our initial public offering in July 1998. During 1998, we
financed our operations and growth through cash flow from operating activities,
primarily from the established regions, short-term credit lines, and the
proceeds of our initial public offering. Net cash used in operations for 1998
was $293,000, compared to net cash used in operations of $2.2 million for 1997.
This change resulted from significant increases in revenues and profitability in
our established markets as of December 31, 1998. Additionally, we received
advance payments from clients on a number of contracts, resulting in the
generation of cash as reflected in deferred revenue balances of $903,000, and
$1.6 million as of December 31, 1997 and December 31, 1998, respectively. We
continue to experience overall operating losses as a result of our recent
expansion into new regions, while our established regions continue to generate
substantial cash flow from operations.
 
     Net cash used in investing activities amounted to $2.3 million for 1998,
including capitalized product development costs, consisting principally of
building photography, and fixed-asset purchases, consisting principally of
computer and office equipment. We currently have no material commitments for
capital expenditures. During the third quarter of 1998, we acquired
Houston-based C Data Services, Inc. in exchange for 93,530 shares of our common
stock and $9,000 in cash. Also, as we described above, in January 1999, we
acquired LeaseTrend, Inc. and Jamison Research, Inc. for a total of $9.8 million
in cash and 1,014,702 shares of our common stock.
 
     On July 8, 1998, we repaid the amount we owed on our line of credit and on
subordinated debt to a stockholder, for a total of $1.7 million out of the
proceeds of our initial public offering. Effective October 5, 1998, we renewed
our line of credit and increased it from $1.0 million to $5.0 million. The line
of credit contains certain restrictive and financial covenants, including
minimum net worth and current ratio requirements. As of December 31, 1998, we
had no borrowings outstanding against the line of credit.
 
     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.
 
     We expect to incur significantly higher costs, particularly as we introduce
new and upgraded services, expand geographically, and develop the infrastructure
to support the expanding organization and client base. Based on our current
plans, the proceeds of this offering combined with available cash and positive
cash flow from our established regions should be sufficient to fund our planned
operations and expansion 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
 
                                       22
<PAGE>   25
 
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. 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.
 
IMPACT OF THE YEAR 2000
 
     We believe that we may be affected by computer problems associated with the
Year 2000. The Year 2000 issue arises because some computer hardware and
software will not work properly after 1999. That failure occurs because many
older systems express dates in a two-digit format. For example, under this
format the year 1999 is expressed as 99. As a result, these older systems may be
unable to distinguish between the year 1900 and the year 2000. That inability
may cause hardware system failures, software miscalculations, and disruptions of
data transmissions.
 
     Our plans to resolve the Year 2000 issue involve the following steps:
assessment, remediation, and confirmation through testing. To date, we have
completed our preliminary assessment of the issue and approximately 60% of the
remediation phase. We have undertaken testing as particular aspects of the
remediation phase are completed.
 
Assessment
 
     Our Year 2000 assessment has included:
 
     - cataloging and evaluating internal hardware and software systems obtained
       from third parties;
 
     - testing the software we have developed ourselves; and
 
     - contacting our clients, suppliers, and service providers.
 
Remediation and Testing Efforts
 
     We have identified three areas that require evaluation and remediation:
internal infrastructure, our proprietary software, and impacts from systems of
vendors and our clients.
 
     Internal Infrastructure.  We are currently cataloging and evaluating our
hardware to determine its Year 2000 compliance. Our workstation supplier has
informed us that all workstations we have obtained from it are compliant. We
have successfully completed testing on 20% of those workstations. We have
purchased new, compliant servers to replace older hardware and expect those
servers to be operational by June 1999. We have scheduled our laptops for
compliance testing by June 1999.
 
     We are also in the process of making the software used in our internal
infrastructure Year 2000 compliant. We have already installed a new, compliant
enterprise accounting system. We expect to convert all of our network server
operating systems to compliant software and to replace our non-compliant phone
and voice mail systems with compliant systems by August 1999.
 
     Proprietary Software and Databases.  Our commercial real estate information
systems use extensive proprietary software and databases. We performed Year 2000
compliance measures for much of this software in prior years since various
fields, like tenant lease expirations, required compliance in the early 1990's
to accommodate post-2000 dates. Since that time, we have assessed all our
proprietary commercial real estate information software to identify areas
vulnerable to these problems. This led us to recode common date routines,
functions, and methods so they would interpret both entered and stored dates
with a compliant approach. We believe that our proprietary
 
                                       23
<PAGE>   26
 
systems are now compliant, but we might still encounter additional Year 2000
defects. In addition, we are upgrading our older internal software applications
with newer systems to provide greater assurance of Year 2000 compliance.
 
     We have identified additional potential Year 2000 risks with respect to our
recently-acquired LeaseTrend and Jamison subsidiaries. We believe that a
significant percentage of their hardware and internal proprietary software are
non-compliant. We are currently upgrading these computer systems and are
converting the acquired databases into our centralized system to replace the
non-compliant products we acquired used by those subsidiaries. We plan to
complete this process in the next several months in the normal course of
business.
 
     Client and Vendor Issues.  Our assessment has also revealed that some of
our clients use hardware and software that is not Year 2000 compliant. As a
result, our clients' systems may not support the use of our software. We have
notified our clients of this potential issue. Where we have uncovered such
problems, we have attempted to ensure compatibility by coding our own
alternatives or replacements. Despite these efforts, our clients' success in
continuing to install and use our services depends significantly on their own
compliance efforts, which we do not control. If necessary, we will develop in
the next several months a contingency plan to address problems arising from our
clients' failure to have compliant computer equipment and software.
 
     Third party Year 2000 compliance problems may also affect us by
interrupting services which we need to conduct our business. For example, most
of our data updates are delivered via the Internet. If Year 2000 problems result
in disruption of the Internet as a delivery system, we believe we could use
alternative delivery systems, which would mitigate to some extent the impact of
this disruption. We also rely on telecommunications providers for communication
services and distribution of our product data updates. Any compliance problems
by these providers could lead to extended loss of their services and significant
unanticipated expenses to remedy the situation.
 
Compliance Costs
 
     Our incremental costs expended to date in connection with Year 2000
compliance have not been significant, as we have undertaken most of our
activities in the normal course of business. We estimate, however, that during
the remainder of 1999 we will spend $1,000,000 in connection with Year 2000
compliance. A large part of this cost will result from upgrading LeaseTrend and
Jamison equipment and software, much of which was planned independently of the
Year 2000 issue.
 
                                       24
<PAGE>   27
 
                                    BUSINESS
 
     Realty Information Group is the nation's largest digital provider of
commercial real estate information and analysis. 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. According to our estimates, in
1998, we facilitated 100,000 commercial lease and sales transactions aggregating
over $100 billion in value. Our wide array of digital service offerings includes
a leasing marketplace, a selling marketplace, decision support, tenant
information, property marketing, and industry news. Substantially all our
current services are digitally delivered and a majority of our clients receive
daily service updates over the Internet.
 
     We have three assets that we believe provide a unique foundation for this
marketplace: the only comprehensive, proprietary, national database in the
industry; the largest research department in the industry; and, the largest
number of participating organizations. Our database has been constructed over
more than a decade by a research department that now makes over 1.8 million
updates each year to the database. In addition to our internal efforts, we have
obtained and assimilated over 50 proprietary databases. The database now covers
35 of the top 40 commercial real estate markets in the United States. It tracks
over 13 billion square feet in over 272,000 properties, including more than $25
billion in properties for sale, and over 310,000 tenants. We estimate that
36,000 participating companies use our marketplace to distribute information on
their properties. Of these participating companies, approximately 2,800 are
clients, representing 20,000 end-users, who subscribe to our services to
facilitate transactions, market services and properties, and conduct market
research.
 
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. We believe that in 1998, the U.S. commercial real estate market had
hundreds of thousands of leasing transactions, with an aggregate value of more
than $200 billion, and had tens of thousands of sales transactions, with an
aggregate value of $285 billion. In the same year, lenders provided tens of
thousands of commercial real estate loans, with an aggregate net value of more
than $110 billion, according to the Federal Reserve Board. F.W. Dodge reports
that during 1998, construction commenced on 766 million square feet of
commercial properties in the U.S. with an aggregate value of $52 billion.
Finally, last year, vendors made $10 billion in sales to tenants who were moving
to new facilities, according to the Corporate Realty Design and Management
Institute.
 
     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.
Therefore, there is a need to develop an efficient marketplace, where members of
the commercial real estate and related business community can exchange
information, evaluate opportunities using national standardized data, and
interact with each other on a continuous basis.
 
                                       25
<PAGE>   28
 
     A large number of parties involved in the commercial real estate and
related business community require extensive information, including:
 
<TABLE>
    <S>                                              <C>
    - Sales and leasing brokers                      - Government agencies
    - Property owners                                - Mortgage-backed security issuers
    - Property management firms                      - Appraisers
    - Design and construction firms                  - Media
    - Real estate developers                         - Tenant vendors
    - Real estate investment trusts                  - Building services vendors
    - Investment banks                               - Communications providers
    - Commercial banks                               - Insurance companies
    - Investors and asset managers                   - Institutional advisors
</TABLE>
 
     The commercial real estate and related business community has yet to
develop an efficient 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 territories and to develop
software to analyze the information they had independently gathered. This
fragmented approach resulted in duplication of effort in the collection and
analysis of information, excessive internal cost, non-standardized data with
varying degrees of accuracy and comprehensiveness, and a large information gap.
 
     The creation of an efficient digital marketplace for commercial real estate
will require an infrastructure of a national, standardized database, accurate
and comprehensive research capabilities, and intensive, real-time participant
interaction. The Internet can help maximize interaction among participants in a
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. International Data Corporation projects that the number of
Internet users will grow from 100 million in 1998 to 320 million in 2002. In
addition to its emergence as a mass communications medium, the Internet has
features and functions that are unavailable in traditional media, which enable
users to:
 
     - communicate or access 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
       entire groups of individuals.
 
     Along with the impressive overall growth of the Internet,
business-to-business usage is also growing rapidly, as businesses are
increasingly leveraging the Internet's ability to reach clients globally,
deliver personalized content, and open new distribution channels.
Business-to-business electronic commerce, according to Forrester Research, is
projected to grow from $17 billion in 1998 to $327 billion in 2002.
 
                                       26
<PAGE>   29
 
THE REALTY INFORMATION GROUP SOLUTION
 
     The CoStar Marketplace.  We are creating a digital commercial real estate
marketplace through CoStar, our Website, and our other related services. We
estimate that 36,000 participating companies use our marketplace to distribute
information on their properties. Of these participating companies, approximately
2,800 are clients, representing 20,000 end-users, who subscribe to CoStar and
our related services to facilitate transactions, market services and properties,
and conduct market research. We, our clients, and other members of the
commercial real estate and related business community continuously update the
marketplace data. Each business day approximately 7,200 updates to the
marketplace database are made. Each night, the resulting information is
distributed via the Internet, creating a more dynamic and efficient market for
transactions involving the commercial real estate and related business
community.
 
     Comprehensive Service Offering.  We have been able to capitalize on the
information accumulated in the CoStar marketplace to create a high value-added,
full-service solution for our clients. We have been able to package the
knowledge and resources of a nationwide commercial real estate and related
business community in a way that is accessible, interactive, standardized, and
comprehensive. As a result, we believe we are the only entity now capable of
providing the depth and breadth of the following services:
 
     - Digital leasing marketplace -- provides the information required to
       efficiently conduct commercial real estate leasing transactions, both
       between brokers and between owners and brokers. We deliver this service
       through CoStar and CoStar Tenant, which benefit our clients by providing
       a more comprehensive solution with much higher data quality, at
       substantially less time and cost than otherwise available.
 
     - Digital selling marketplace -- provides the information required to
       efficiently and securely conduct commercial real estate buy and sell
       transactions. We currently deliver this service through CoStar and intend
       to enhance this service through CoStar Exchange. This service benefits
       our clients by allowing purchasers to make more-informed investments and
       sellers to maximize realized property values.
 
     - On-line decision support services -- allow members of the community to
       perform analysis of underlying market conditions and trends when making
       investment, leasing, purchase, sale, build, and marketing decisions
       involving commercial real estate. We currently deliver these services
       through Jamison Advisory, CoStar, and CoStar Tenant and intend to enhance
       these services through CoStar Analytic and CoStar Comparables. These
       services benefit our clients by providing powerful, flexible,
       time-efficient, and accurate analytic capabilities.
 
     - Tenant information services -- enable members of the commercial real
       estate and related business community to identify and market to the
       tenants who are the most likely prospects for their goods and services.
       We deliver these services primarily through CoStar Tenant. These services
       benefit our clients by more precisely identifying and capturing viable
       prospects at a lower cost.
 
     - On-line property marketing -- provides a targeted 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 CoStar and via our Website and intend to enhance this
       offering through a new service, E-Brochure. This service benefits our
       clients by providing them increased distribution, higher visibility, and
       a more cost-effective way to reach their targeted audience than otherwise
       available.
 
                                       27
<PAGE>   30
 
     - On-line industry news -- allows members of the commercial real estate and
       related business community to remain current with developments in the
       industry. We deliver these services through CoStar, www.rig.com, and
       Real-E News, which benefit our clients by providing more timely and
       in-depth news.
 
     Internet and Web Access to CoStar Services.  Substantially all our current
services are digitally delivered. About 65% of our clients currently receive
their CoStar data via the Internet. We are in the process of making our services
accessible through a standard Web-browser format. As a result, we expect to
generate an increasing portion of our revenues from Web-based services. The
increased availability of our services from a Web-based platform will allow the
commercial real estate and related business community real-time access to the
CoStar marketplace data and provide the opportunity for increased interaction
among community members. We believe this will lead to the development of a more
efficient commercial real estate marketplace.
 
     Leveraging Leading Edge Technology.  We use the latest technology to
continuously improve our data collection, enhance our sales efforts and our
service capabilities, and control costs as we build upon the CoStar marketplace
framework. For example:
 
     - We use global satellite positioning and the Internet to coordinate remote
       field research vehicles equipped with GPS transponders, laptop computers,
       cellular communications, and laser measurement devices, to provide the
       most precise and timely inventory of available buildings.
 
     - We are integrating a proprietary enterprise-wide client and property
       information management system with our telecommunications system and our
       database, to allow the sales force, research staff, client-service staff,
       and accounting department to develop a coordinated sales, research, and
       account management effort. This enterprise-wide system is also designed
       to assist management in improving quality control and training.
 
     - We now collect our architectural photographs digitally so that we can
       move the images into our database substantially faster and at lower cost.
 
     National, Standardized Presence.  We are creating the first national and
standardized source for commercial real estate metrics that are comparable
between geographic territories. For example, the definitions of vacancy rates
and building classifications have varied among the different providers of real
estate information. Our national presence and the uniformity of our services and
data across all of our markets provides a foundation for members of the
commercial real estate and related business community to do business on a
national basis. Leading firms within the community conduct business efficiently
in multiple local markets by standardizing their internal systems on our
proprietary database. Currently 20% of our clients subscribe to services in
multiple markets.
 
THE COSTAR STRATEGY
 
     Our objective is to complete the development of the CoStar digital
marketplace for the commercial real estate and related business community across
the United States and to introduce it in select international markets. The
principal components of our strategy to accomplish this are:
 
     - Introduce New and Upgraded Services.  We believe the CoStar marketplace
       contains a wealth of information that we can enhance and package into an
       array of new services. We intend to introduce the following new and
       upgraded services over the course of the next 18 months:
 
          - CoStar Exchange will be a Web-based marketplace to more efficiently
            and securely facilitate the buying and selling of commercial
            properties.
 
                                       28
<PAGE>   31
 
          - CoStar Comparables will be a Web-based service enabling our clients
            to track and analyze sales comparables in a more timely and
            comprehensive manner than is currently possible.
 
          - E-Brochure will provide members of the commercial real estate and
            related business community with more cost-effective Web-based and
            CD/ROM-based brochures, intended to replace the millions of paper
            brochures currently used to advertise buildings.
 
          - CoStar Analytic will provide a Web-based analytic tool that will
            assist the commercial real estate and related business community in
            analyzing the important changing trends in market metrics such as
            vacancy rates, rental rates, tenant demographics, new construction,
            and absorption rates.
 
          - Real-E News will be a free customized Internet-delivered and
            Web-based service that will provide the subscriber's pre-selected
            preference categories via spot news and analytical articles about
            the commercial real estate industry. We plan to generate advertising
            revenue from banner ads, mostly about available properties, that are
            placed around the news stories.
 
     The introduction of these new services, along with the expansion of our
     CoStar Tenant service, will allow us to cross-sell a comprehensive suite of
     services to our existing clients across the country. By contrast, to date,
     we have primarily offered only one or two of our services in each of our
     markets.
 
     - Increase Penetration in Current Markets.  We believe that we can
       significantly expand our client base and increase revenues in our
       established markets. Initially upon penetrating a new market, we
       typically sign up leading commercial real estate brokerage firms within
       six months of entry, which allows us to gain a strategic position in that
       market's information flow. From there, we significantly expand our sales
       and marketing efforts in these markets so that we can further penetrate
       the broader client base. In 1998, for example, we doubled our sales force
       in our established markets, which helped to increase revenues in those
       markets by 66%. We intend to continue to significantly expand our sales
       force and open new field sales offices to further penetrate established
       markets.
 
     - Enter New U.S. Markets and Develop National Accounts.  We intend to
       broaden our potential client base by entering new U.S. markets. Many of
       our existing clients have offices in these targeted markets which will
       enable us to accelerate our rate of market acceptance in these new
       regions. This geographic expansion should also broaden our base of
       national accounts. Currently, we have 30 national accounts, which we
       believe constitute a small portion of the potential market. By completing
       our geographic expansion within the U.S., we believe our services will be
       more attractive to a much larger number of national accounts who require
       comprehensive coverage of the major U.S. commercial real estate markets.
 
     - Expand Internationally.  We plan to enter select international markets,
       including Canada, the United Kingdom and Europe. Either independently or
       in connection with strategic acquisitions, we intend to gain a foothold
       in each new target market with one of our services developed for the
       local market. Then, over time, we plan to develop all of our services for
       that market. We also believe that there is significant demand in these
       international markets for U.S. commercial real estate information.
 
     - Improve and Enhance the CoStar Marketplace.  We believe that CoStar is
       the most comprehensive marketplace of information about the commercial
       real estate and related business community. We intend to maintain that
       leading position by continuously improving
 
                                       29
<PAGE>   32
 
       CoStar's comprehensiveness and quality. Our efforts will include adding
       additional buildings to our database and improving our model for
       collecting the data underlying CoStar. We also intend to continue our
       technological leadership by continuing to move the distribution of our
       services to the Internet and the Web, by increasing the interactivity of
       our services with our clients, by continuing our evolution as the digital
       marketplace for real estate transactions, and by increasing our community
       presence via our Website.
 
     - Pursue Strategic Acquisitions.  We intend to continue making strategic
       acquisitions to broaden our service offerings and to further expand our
       geographic coverage. We actively search for services that complement our
       existing suite of services. Additionally, we intend to actively explore
       acquisitions abroad to help penetrate international markets.
 
SERVICES
 
     The following table illustrates what we believe to be the relative need for
our current and proposed services by some of the members of the commercial real
estate and related business community, based upon our experience with demand for
our existing services as well as discussions with our clients and other industry
participants.

                           [INDUSTRY SEGMENT CHART]

     Our various services are described in detail in the following paragraphs.
 
     CoStar.  CoStar has fostered the development of the digital leasing
marketplace. Clients use CoStar 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 extensively to market their
properties. The subscriber can query CoStar with any combination of pertinent
criteria, combining any of approximately one hundred data fields from categories
such as building size, location, building characteristics, space
 
                                       30
<PAGE>   33
 
availability, ownership, or sales comparables. CoStar'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. The user can
select from over 50 customizable reports, presenting space availability,
comparable sales, tenant activity, market statistics, photographs, and floor
plans. The user can export and edit reports, photos, and floor plans to help
determine feasibility of a specific space. Our clients also use CoStar to
analyze market conditions by calculating current vacancy rates, absorption
rates, or average rental rates. About 65% of our clients currently receive daily
service updates via the Internet.
 
     CoStar Tenant.  CoStar Tenant delivers detailed information profiling the
tenants occupying commercial buildings by tracking over 310,000 tenants in 23
U.S. markets. We expect to expand that coverage to more than 1 million tenants
over the next two years. A key service feature is accurate lease expiration
information. Clients use CoStar Tenant to:
 
     - find information about particular tenants;
 
     - identify and target the most likely tenants to lease space;
 
     - identify all tenants in a particular building;
 
     - understand trends and the underlying demand for commercial real estate;
 
     - identify and target the tenants most likely to need representation for
       their real estate requirements; and
 
     - identify and target the tenants most likely to buy a particular vendor's
       goods and services.
 
     CoStar Exchange.  We have developed a database of over 25,000 commercial
properties for sale with a combined asset value in excess of $25 billion. We
intend to distribute that information through a secure Web service, to be known
as CoStar Exchange. Sellers of properties will be able to list extensive
information about their properties for sale on the site at no cost. The site
will afford an efficient means for these sellers to reach a large universe of
potential buyers. Potential buyers will pay a subscription fee to access the
system. Sellers of investment-grade properties will have the additional option
of selecting limited, secure distribution of their properties in order to
address confidentiality requirements.
 
     CoStar Analytic.  We currently provide a full line of detailed analytical
tools and reports through Jamison Advisory, CoStar, and CoStar Tenant. These
tools provide strategic insight into the changing trends in vacancy rates,
tenant movements, supply, new construction, absorption rates, and other
important market metrics. We intend to enhance these services through CoStar
Analytic. CoStar Analytic will provide a Web-based analytic tool that will allow
users to perform more sophisticated analyses of underlying market conditions and
trends when making investment, leasing, purchase, sale, construction, and
marketing decisions involving commercial real estate. We may also provide
fee-based customized reports and advisory services.
 
     CoStar Comparables.  We currently track tens of thousands of commercial
real estate sales. CoStar Comparables will be an enhanced Web-based service
providing confirmed commercial real estate sales information on properties which
have recently sold. We believe that CoStar currently contains more major office
and industrial properties for sale than any other single information source. As
transactions involving these properties in CoStar are consummated, frequently we
can obtain details of the transaction weeks before most traditional comparable
sale providers have access to the information. In addition, we believe we are
uniquely positioned to provide other valuable information beyond the basic
confirmed comparable sale price, such as comprehensive leasing information,
detailed tenant rent rolls, and local market conditions.
 
                                       31
<PAGE>   34
 
     CoStar Advertising.  We estimate that the participants in the CoStar
marketplace will directly influence approximately $100 billion in leasing and
sales each year. We currently provide digital marketing opportunities to reach
this audience through premium high-exposure banner ads on CoStar and on our
Website. In addition, our new E-Brochure service will allow commercial real
estate professionals to replace the millions of costly print fliers produced
each year to direct market their properties with a cost-effective digital
version. We will distribute these E-Brochures via the Web, CoStar, and CD/ROM.
 
     CoStar News.  Our Website, CoStar, and our e-mail news dispatches have
become an accepted source of reliable industry news. In 1998, we authored over
3,000 news stories. Our articles have been cited by numerous major news
organizations. Our newswire feature keeps clients informed of late-breaking
commercial real estate news such as deals signed, acquisitions, ground breakings
and other features. Web banner ads are prominently displayed on the site,
generating additional revenues. We plan to develop and deliver a free e-mail
news-dispatch system built around customized client profiles, with
highly-targeted banner advertising attached.
 
THE DATABASE BEHIND COSTAR
 
     We believe that our proprietary database, actively tracking over 13 billion
square feet of U.S. commercial properties, is one of the largest in existence.
On an annual basis, over 270 researchers make 1.8 million updates to the
database. This complex database is comprised of hundreds of data fields,
tracking such categories as:
 
<TABLE>
<S>                                                  <C>
- - Location                                           - Mortgage and deed information
- - Site and zoning information                        - For-sale information
- - Building characteristics                           - Income and expense histories
- - Space availability                                 - Tenant names
- - Tax assessments                                    - Lease expirations
- - Ownership                                          - Contact information
- - Sales comparables                                  - Historical trends
</TABLE>
 
     The database includes over 262,000 high-resolution digital images,
including building photographs, aerial photographs, and floor plans. The
database tracks approximately 310,000 tenants occupying office and industrial
space in 23 U.S. markets. We expect to expand coverage to more than 1 million
tenants over the next two years, which we believe will generate additional
revenues and heighten barriers to entry.
 
CLIENTS
 
     We draw clients from across the commercial real estate and related business
community. Commercial real estate brokers have traditionally been the largest
portion of our clients, but recently,
 
                                       32
<PAGE>   35
 
the fastest growing segments have been owners, lenders, and vendors. The
following chart provides representative clients in various categories.
 
<TABLE>
<CAPTION>
BROKERAGE                               OWNERS, DEVELOPERS                    PROPERTY MANAGERS
- ---------                               ------------------                    -----------------
<S>                                     <C>                                   <C>
CB Richard Ellis                        Gale & Wentworth                      Kennedy-Wilson Properties
Grubb & Ellis                           Hines                                 Leggat McCall Properties
Insignia/ESG                            Manulife Financial                    Lincoln Property Company
Julien J. Studley                       Trammell Crow Company                 PM Realty Group
The Staubach Company                    TrizecHahn Corporation                U.S. Equities Realty
 
REITS                                   LENDERS, INVESTMENT BANKERS           VENDORS
- ------------------------------------    ----------------------------------    ----------------------------------
Boston Properties                       Bankers Trust                         IntelliSpace
CarrAmerica                             Donaldson, Lufkin & Jenrette          Kastle Systems
Cornerstone Properties                  GMAC Commercial Mortgage              RCN Corporation
Equity Office Properties                Merrill Lynch                         Teligent
Prentiss Properties                     NationsBank                           WinStar Communications
 
                                                                              INSTITUTIONAL ADVISORS,
GOVERNMENT AGENCIES                     APPRAISERS, ACCOUNTANTS               ASSET MANAGERS
- ------------------------------------    ----------------------------------    ----------------------------------
 
County of Los Angeles                   Arthur Andersen                       AEW Capital Management
Fairfax County Development Authority    E & Y Kenneth Leventhal Real          Jones Lang LaSalle
Montgomery County Office of Economic    Estate Group                          Legg Mason
  Development                           Koeppel Tener Real Estate Services    Lend Lease Real Estate
NYC Economic Development Corp.          KPMG                                  Investments
U.S. General Services Administration    PricewaterhouseCoopers                USAA Real Estate Company
</TABLE>
 
     We currently have over 2,800 clients, including the majority of the
national commercial real estate brokerage firms. These national firms have
offices in markets we are expanding into, which enables us to accelerate our
rate of market acceptance in these new regions. No single client accounts for
more than 5% of our revenues. During the past five years, our contract renewal
rate has exceeded 90%.
 
SALES AND MARKETING
 
     We have 55 sales and marketing employees, with the majority of our direct
sales force located in the field. Our sales teams are located in 14 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 field sales offices also work with our headquarters
operation to coordinate sales to our multi-market and national clients. In
addition, we have 24 client service staff members with responsibility for
installing and training our client base, ensuring high client satisfaction,
renewing existing client contracts, and identifying cross-selling opportunities.
We use a proprietary enterprise-wide client management system integrated with
our database and telecommunications system. This integrated system allows the
sales force, research staff, client service, and accounting department to
develop a coordinated sales and account management effort.
 
     Our field sales people focus in one of two areas, Information Solutions or
Marketing Solutions. The Information Solutions sales personnel focus on existing
information services such as CoStar and CoStar Tenant, as well as new
information services such as CoStar Exchange and CoStar Analytic. The majority
have significant commercial real estate experience, allowing them to take a
consultative sales approach. The Marketing Solutions sales personnel sell
on-line advertising and new services such as E-Brochure. The majority have an
advertising sales background or experience in commercial real estate.
 
                                       33
<PAGE>   36
 
     Our sales strategy is to aggressively attract new clients, while providing
ongoing incentives for existing clients to subscribe to our newer services. To
help drive rapid growth in our sales force, we have established an in-house team
that is responsible solely for seeking out and recruiting quality sales people.
 
     We seek to make our services essential to our clients' businesses. To
encourage clients to use our services regularly, we 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, and the number of services to
which a client subscribes.
 
     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. Once we have identified a prospective client, we have found
the most effective sales method is a service demonstration. Our direct marketing
efforts include direct mail, e-mail, and telemarketing, and make extensive use
of our unique, proprietary database. Our advertising includes Internet banners,
private network banners, and traditional print advertising. This form of
advertising is used for brand identity, message reinforcement, and potential
client identification.
 
DATA COLLECTION
 
     We have developed a sophisticated data collection organization, made up of
a combination of researchers, management systems, computer and communications
hardware, and software systems.
 
     Research.  We employ over 270 researchers to collect and analyze office and
industrial real estate information through over 400,000 phone calls and faxes a
year, in addition to e-mails, field inspections, news monitoring, and direct
mail. Every new research employee undergoes an extensive training program to
maintain a consistent research process. Because of the importance commercial
real estate professionals place on our data and our prominent position in the
industry, they frequently take the initiative to report transactions to our
researchers.
 
     Management and Quality Control Systems.  We use both automated and
non-automated controls in an effort to ensure the integrity of the data
collection process. Automated data quality tests check for potential errors
including occupancy date conflicts, available square footage greater than
building area, typical floor 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; and
 
     - performing field checks to determine if we correctly canvassed all
       buildings.
 
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 frequently.
 
     Computer and Communications Hardware.  We maintain Novell and 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.
 
                                       34
<PAGE>   37
 
     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:
 
     - collecting building-specific data;
 
     - tracking of commercial real estate companies and individuals;
 
     - facilitating our operations; and
 
     - distributing data.
 
COMPETITION
 
     The market for information systems and services generally is competitive
and rapidly changing. The principal competitive factors for commercial real
estate information are:
 
     - the quality, depth, and timeliness of the underlying databases;
 
     - the ease of use, flexibility, and functionality of the software;
 
     - the perception that the service offered is the industry standard;
 
     - the proprietary nature of methodologies and databases;
 
     - the effectiveness of marketing and sales efforts;
 
     - client service and support;
 
     - breadth of geographic coverage and services offered;
 
     - technical resources;
 
     - capital resources; and
 
     - price.
 
     We do not believe that we presently face competition from any other company
on a national basis for our existing services. We do face competition on a
regional basis. For example, ReLocate, Inc. provides a product that competes
with us in New York City, Philadelphia, Dallas, and Boston. In a few
jurisdictions, third-party databases or print publications compete with us on a
purely local basis. Our primary competition comes indirectly, however, from the
in-house research departments still operated by some commercial real estate
brokers.
 
     The new services that we are developing may bring us into competition from
various sources. For example, our E-Brochure and our other enhanced CoStar
Advertising services will compete for property marketing revenues with Web-based
bulletin boards such as Loopnet Venture, Inc. Our CoStar Comparables service
will compete with services from companies like Comps.com, Inc., which provide
enhanced versions of generally-available public record data.
 
     As a digital real estate marketplace develops, additional competitors
(including companies having greater 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.
 
                                       35
<PAGE>   38
 
PROPRIETARY RIGHTS
 
     To protect our proprietary rights in our methodologies, database, and
software, we depend upon a combination of:
 
     - trade secret and copyright laws;
 
     - nondisclosure and other contractual provisions; and
 
     - technical measures.
 
We have not filed any patent applications covering our methodologies and
software.
 
     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 CoStar software and user manuals. We have also filed for copyright
registration of the CoStar database. 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 they would find it
very time-consuming and costly to create a competing database. We also intend to
take appropriate measures to protect our intellectual property rights in the
data and software obtained through our recent acquisitions of LeaseTrend, Inc.
and Jamison Research, Inc.
 
     We distribute our software and services under agreements that grant our
clients non-exclusive licenses. These agreements restrict the disclosure and use
of our data and software. They prohibit the unauthorized reproduction or
transfer of the information and software we provide. In addition, we attempt to
protect the secrecy of our proprietary database and other trade secrets and
proprietary information through agreements with our employees and consultants.
Our services also include technical measures to discourage unauthorized copying.
 
     In April 1999, we entered into separate licensing agreements with
Acxiom/DataQuick Products Group and Transamerica Intellitech, Inc., which are
two of the three major national companies that obtain and distribute
publicly-filed information about property sales prices and assessed property
values. In connection with CoStar Comparables and some of our other services, we
intend to use the data we have licensed to supplement the information already
maintained in our proprietary database. Both agreements have two-year terms that
we may, at our option, extend for an additional year. Both agreements also have
certain exclusivity provisions applying to a majority of the jurisdictions for
which these providers offer information. These provisions, which do not apply to
these providers' current licensing agreements, generally require that the
provider not license its data for use in products or services that are
substantially similar to CoStar Comparables.
 
     We have filed applications to register the "CoStar" mark in the United
States, Canada, and the United Kingdom. We believe that we have developed
substantial goodwill in connection with this mark as an indicator of the quality
of our services.
 
EMPLOYEES
 
     As of March 15, 1999, we employed 419 employees, including 272 researchers
and 55 sales and marketing employees. None of our employees is represented by a
labor union. We have experienced no work stoppages. We believe that our employee
relations are good.
 
FACILITIES
 
     Our corporate offices occupy approximately 48,000 square feet in Bethesda,
Maryland, under leases and subleases expiring June 30, 2000. We also lease
office space in the following cities: New
 
                                       36
<PAGE>   39
 
York; Los Angeles; Elmhurst, Illinois; San Francisco; Boston; Newport Beach;
Philadelphia; Houston; Cincinnati; Atlanta; Phoenix; San Diego and Dallas. Our
aggregate lease payments for 1998, adjusted to include on a pro forma basis the
lease payments made by LeaseTrend and Jamison Research, were approximately $1.4
million.
 
LEGAL PROCEEDINGS
 
     From time to time, we have been involved in lawsuits incidental to our
business. We are not currently subject to, and none of our properties is subject
to, any material legal proceedings.
 
                                       37
<PAGE>   40
 
                                   MANAGEMENT
 
EXECUTIVE OFFICERS, KEY EMPLOYEES AND DIRECTORS
 
     Our executive officers, key employees, and directors are as follows:
 
<TABLE>
<CAPTION>
                                            YEARS
               NAME                 AGE   OF SERVICE                      POSITION
               ----                 ---   ----------                      --------
<S>                                 <C>   <C>          <C>
Michael R. Klein..................  57        12       Chairman of the Board of Directors
Andrew C. Florance*...............  35        12       Chief Executive Officer, President, and
                                                       Director
Frank A. Carchedi*................  41         2       Chief Financial Officer
Curtis M. Ricketts*...............  36         4       Senior Vice President of Sales and Marketing
David M. Schaffel*................  38        10       Vice President of Product Development
Fred A. Heitzman III*.............  49        10**     Senior Vice President
Henry D. Jamison IV...............  42        18**     President of Jamison Research, Inc.***
Dean Violagis.....................  32         9       Vice President of Research
Robert J. Caulfield, Jr. .........  43         1       Vice President of Sales
Gregory Benkert...................  43        10**     Vice President
David Bonderman...................  56        12       Director
Warren H. Haber...................  58         4       Director
John Simon........................  56         3       Director
Lanning Macfarland III............  46         3       Director
</TABLE>
 
- -------------------------
*   Executive Officer
**  Includes years of service with acquired companies.
*** Jamison Research, Inc. is one of our wholly-owned subsidiaries.
 
     Michael R. Klein is one of our founders and has been Chairman of our Board
of Directors since 1987. He has been, since 1974, a partner of the law firm
Wilmer, Cutler & Pickering, based in Washington, D.C., and was a member of its
five-person management committee until July 1998. Over the past five years Mr.
Klein has served as a member of the board of directors (and Audit Committee
Chairman) of both National Education Corporation and Steck-Vaughn Publishing
Corporation, and as a director (and member of the Executive Committee) of Perini
Corporation. He is also a director of SRA International, Inc. In 1990 to 1991,
on leave from his law firm, he served as the Chief Administrative Officer and
Vice Chairman of the Board of Directors of Republic Waste Industries, Inc. (now
known as Republic Industries, Inc.).
 
     Andrew C. Florance is also one of our founders and has served as our
President and as a Director since 1987 and as our Chief Executive Officer since
1995. Prior to founding Realty Information Group, Inc., Mr. Florance was
President of a predecessor company, Real Estate Infonet, a real estate public
records publishing operation, from 1985 to 1987. Mr. Florance held primary
responsibility for developing the first generation software products for Federal
Filings, a SEC form 13-D tracking service, which was later acquired by Dow
Jones. Mr. Florance was a co-founder of a commercial real estate information
trade association (REI-NEX) and served on its board from 1993-96. Mr. Florance
served on the focus group responsible for developing the concepts related to the
Federal government's use of real estate in Vice President Gore's National
Performance Review. He received a B.A. in economics from Princeton University.
 
     Frank A. Carchedi, our Chief Financial Officer, joined us in May 1997 from
ITC Learning Corporation, a publicly held publisher and distributor of
multi-media training products, where he had been Vice President, Treasurer and
Chief Financial Officer since 1995. Prior to that, Mr. Carchedi was with Ernst &
Young, LLP for ten years, most recently as a consultant in the firm's New York
 
                                       38
<PAGE>   41
 
Merger and Acquisitions Group and its Entrepreneurial Services Group in
Washington, D.C. He received a B.S. in accounting from Wake Forest University.
 
     Curtis M. Ricketts, our Senior Vice President of Sales and Marketing,
joined us as the Vice President of Sales and Marketing in December 1994. Prior
to joining us, Mr. Ricketts spent six years as an officer of the Carey Winston
Company, the largest office and industrial real estate services firm in the
Washington-Baltimore region. Mr. Ricketts served as a broker and as the chief
financial analyst for the firm's office and industrial brokerage and advisory
divisions, but was also responsible for new technology. Mr. Ricketts majored in
business at the University of Maryland.
 
     David M. Schaffel, our Vice President of Product Development, has been with
us since 1989. Mr. Schaffel is responsible for the design, development, and
maintenance of our software services and products as well as any new services.
From 1987 until joining us, Mr. Schaffel was president of Biscayne Technical
Services, Inc., where he developed a logistics tracking application for the
United States Air Force. Mr. Schaffel received a M.S. - Operations
Research/Statistics from the University of Miami and a B.S. in business from the
University of Florida.
 
     Fred A. Heitzman III, Senior Vice President, joined us upon the acquisition
of LeaseTrend, Inc. in January 1999, where he had served as President since he
founded the company in 1988. Prior to that, he was the President of Ameristate,
Inc., a real estate information company providing ownership and comparable sales
information, which he founded in 1978. Mr. Heitzman is a member of the
Cincinnati Real Estate Roundtable, REEAC, CEO Roundtable, and a director of
Enerfab, Inc. Mr. Heitzman received a B.A. in economics from Denison University.
 
     Henry D. Jamison IV, President of our Jamison Research, Inc. subsidiary,
joined us in January 1999 when we acquired Jamison Research, Inc., where he had
been Chairman since founding the firm in 1981. Prior to that, Mr. Jamison was
employed as a national accounts manager with his family's Nashville-based
manufacturing firm, Jamison Bedding and Furniture, Inc. Mr. Jamison majored in
business at the University of Colorado.
 
     Dean Violagis, our Vice President of Research, is responsible for our
research department, of which he has been a manager since 1989. Mr. Violagis
received a B.A. in real estate finance from the American University in
Washington, D.C.
 
     Robert J. Caulfield, Jr. serves as Vice President of Sales. Prior to
joining us in 1998, Mr. Caulfield was Director of Sales and Business Manager of
the Southeast District of Reuters America, Inc. from 1988 to 1998, where he
managed a media sales unit. Prior to joining Reuters, he was a marketing manager
of Southern California Technology Executives Network. Mr. Caulfield received a
B.S. in marketing from Villanova University and his M.B.A. in international
marketing from The George Washington University.
 
     Gregory Benkert, who serves as Vice President, joined us upon the
acquisition of LeaseTrend, Inc. in January 1999, where he had been Vice
President since 1991. Prior to that, he was Vice President and Chief Financial
Officer of Ameristate, Inc. for five years, and prior to that an Audit Manager
with Arthur Andersen & Co. Mr. Benkert is a Certified Public Accountant and
received a B.A. and an M.B.A from Xavier University.
 
     David Bonderman is principal of Texas Pacific Group and an indirect general
partner of TPG Partners I, L.P. and TPG Partners II, L.P. Prior to forming Texas
Pacific Group, Inc., Mr. Bonderman served as Vice President and Chief Operating
Officer of Keystone, Inc. (formerly the Robert M. Bass Group, Inc.) from July
1983 to August 1992. Mr. Bonderman was a partner in the law firm of Arnold &
Porter from 1971 to 1983. Mr. Bonderman currently serves on the boards of
directors of Continental Airlines, Inc., Bell and Howell Company, Ducati
Motorcycles S.p.A.,
 
                                       39
<PAGE>   42
 
Beringer Wine Estates, Denbury Resources, Inc., Ryanair, P.L.C., Washington
Mutual, Inc., Oxford Health Plans, Inc., and Virgin Entertainment, Ltd. He has
been one of our Directors since 1987.
 
     Warren H. Haber has been, for more than twenty-five years, Chairman of the
Board and Chief Executive of Founders Equity, Inc. and its affiliates, private
investment concerns engaged in the business of identifying businesses for
acquisition in principal transactions and managing such businesses for their own
accounts. Mr. Haber currently serves on the boards of directors of Beverly Glen
Medical Systems, American Lifecare, Grand Charter, Ltd. and Warnex Pharma. He
has served as one of our Directors since 1995.
 
     John Simon is a Managing Director of the investment banking firm Allen &
Company Incorporated, with which he has been associated for over 20 years. Mr.
Simon currently serves on the board of directors of The Immune Response
Corporation, Neurogen Corporation, and Advanced Technical Products, Inc. Mr.
Simon has sat on our Board of Directors since 1996.
 
     Lanning Macfarland III has been associated with the Law Bulletin Publishing
Company of Chicago since 1983, from which we acquired ReSource in March 1996. He
is currently the General Operations Officer of LBPC and is its publisher for all
real estate trade publications and is responsible for all new product
development and on-line legal services. Prior to his association with LBPC, Mr.
Macfarland held sales and publishing positions with The New Yorker, Time, Inc.
and Bradley Printing. He has served as one of our Directors since 1996.
 
ELECTION OF DIRECTORS
 
     All of our current directors serve for one-year terms or until their
successors are elected and qualified. Stockholders' agreements that included
provisions governing the composition, power, and election of the Board of
Directors terminated following our initial public offering in July 1998.
 
COMMITTEES OF THE BOARD OF DIRECTORS
 
     Our Board of Directors has an Audit Committee that reviews the results and
scope of the annual audit and other services provided by our independent public
accountants. It also has a Compensation Committee that makes recommendations
concerning salaries and incentive compensation for our employees. The Board of
Directors has designated the Compensation Committee as the administrator of the
Stock Option Plan described below.
 
DIRECTOR COMPENSATION
 
     Those members of our Board of Directors who do not also serve as an officer
or employee with us are entitled to their expenses for attending each meeting of
the Board of Directors and each meeting of any committee. Until May 1998,
Founders Equity Inc. received a monthly fee of $10,000 and Mr. Klein a monthly
fee of $6,667, but those fee arrangements have terminated. Since our initial
public offering last year, our non-employee directors have been entitled to
$15,000 annually payable in shares of our common stock.
 
                                       40
<PAGE>   43
 
EXECUTIVE COMPENSATION
 
     The following table provides the annual salary, bonuses, and all other
compensation awards and payouts to our Chief Executive Officer and President and
to our most highly compensated executive officers who earned more than $100,000
in salary and bonus in 1998 (collectively, the "Named Executive Officers") for
1996 through 1998.
 
                           SUMMARY COMPENSATION TABLE
 
<TABLE>
<CAPTION>
                                                                                               LONG-TERM          ALL OTHER
                                 ANNUAL COMPENSATION                                      COMPENSATION AWARDS    COMPENSATION
- --------------------------------------------------------------------------------------   ---------------------   ------------
                                        FISCAL                            OTHER ANNUAL   SECURITIES UNDERLYING
NAME AND PRINCIPAL POSITION              YEAR     SALARY        BONUS     COMPENSATION          OPTIONS
- ---------------------------             ------   --------      --------   ------------   ---------------------
<S>                                     <C>      <C>           <C>        <C>            <C>                     <C>
Andrew C. Florance....................   1998    $166,346            --           --             65,000            $ 2,309
  Chief Executive Officer & President    1997     150,000      $100,000     $150,000(1)              --              2,122
                                         1996     150,000       100,000      150,000(1)              --                 --
Frank A. Carchedi.....................   1998     117,096        27,029           --             40,000                865
  Chief Financial Officer                1997      70,654(2)     20,000           --             15,150                 --
                                         1996          --            --           --                 --                 --
Curtis M. Ricketts....................   1998     104,362        47,126           --             25,000              2,108
  Senior Vice President                  1997      83,077        46,166           --                 --              1,700
  of Sales and Marketing                 1996      64,481        37,012           --                 --                 --
David M. Schaffel.....................   1998     136,871         3,044           --             40,000             19,097
  Vice President of                      1997     117,898         3,000           --                 --              9,478
  Product Development                    1996      96,941         3,000           --                 --                 --
</TABLE>
 
- -------------------------
(1) In 1997, we paid Mr. Florance additional compensation in the form of shares
    of a predecessor company valued at the equivalent of $4.62 per share for our
    common stock.
(2) Mr. Carchedi joined us as Chief Financial Officer in May 1997. On an
    annualized basis, his base salary was $110,000 per year in 1997.
 
EMPLOYMENT AGREEMENTS
 
     We have employment agreements with Messrs. Florance, Carchedi, Ricketts,
and Schaffel. Each of these agreements is effective as of January 1, 1998. Each
entitles the executive to a specified base salary, a bonus award up to a
specified percentage of base compensation based upon achievement of performance
objectives, and an award of stock options vesting over time. The executive also
may participate in any insurance, medical, disability or pension plan generally
made available to our senior executive officers.
 
     The agreements are for initial terms of two years (three in the case of Mr.
Florance) and are automatically renewable for successive one-year terms unless
we or the executive terminate the agreement. Each agreement contains a covenant
not to compete with us for the two years immediately following termination, but
applicable law may limit the term or scope of this covenant. The agreements
generally provide that, if we terminate the executive's employment without good
cause, the executive is entitled to his base salary for the greater of six
months or whatever period remains under the agreement, to a prorated share of
his bonus for the year in which termination occurred, and to the immediate
vesting of all stock options due to vest within the following 12 months.
 
     The termination provisions of Mr. Florance's agreement differ in that they
also apply if he terminates the agreement for good cause; in that his
termination payments will be for the greater of 12 months or the remaining
period under the agreement; that he will receive a gross-up payment to cover any
taxes assessed under Section 4999 of the Internal Revenue Code; and in that all
his unvested stock options will vest.
 
                                       41
<PAGE>   44
 
     The following table gives specific economic terms of these agreements.
 
<TABLE>
<CAPTION>
                                                                              MAXIMUM BONUS        NUMBER AND
                                                                            AS PERCENTAGE OF    EXERCISE PRICE OF
                        NAME                          INITIAL BASE SALARY   BASE COMPENSATION     STOCK OPTIONS
                        ----                          --------------------  -----------------   -----------------
<S>                                                   <C>                   <C>                 <C>
Andrew C. Florance..................................        $175,000               100%              65,000
                                                                                                      at $9
Frank A. Carchedi...................................        125,000                 75               40,000
                                                      (as of July 1, 1998)                            at $9
Curtis M. Ricketts..................................        110,000                100               25,000
                                                      (as of July 1, 1998)                            at $9
David M. Schaffel...................................        120,000                 50               40,000
                                                      (as of July 1, 1998)                            at $9
</TABLE>
 
- ------------------
25% of the options vest on each of the following dates: July 1, 1998, and
December 31, 1998, 1999, and 2000.
 
OPTION GRANTS
 
     The following table provides certain information regarding grants of stock
options to the Named Executive Officers during 1998.
 
                     OPTION/SAR GRANTS IN LAST FISCAL YEAR
 
<TABLE>
<CAPTION>
                                                                        INDIVIDUAL GRANTS
                                      --------------------------------------------------------------------------------------
                                      NUMBER OF         PERCENT OF
                                      SECURITIES       TOTAL OPTIONS       EXERCISE
                                      UNDERLYING        GRANTED TO          OR BASE
                                        OPTION         EMPLOYEES IN          PRICE         EXPIRATION          GRANT DATE
               NAME                    GRANTED          FISCAL YEAR        ($/SHARE)          DATE          PRESENT VALUE(1)
               ----                   ----------       -------------       ---------       ----------       ----------------
<S>                                   <C>              <C>                 <C>             <C>              <C>
Andrew C. Florance................      65,000             12.0%              $9           6/30/2008            $433,550
Frank A. Carchedi.................      40,000              7.4                9           6/30/2008             266,800
Curtis M. Ricketts................      25,000              4.6                9           6/30/2008             166,750
David A. Schaffel.................      40,000              7.4                9           6/30/2008             266,800
</TABLE>
 
- ------------------
(1) The grant date present value is computed using the Black-Scholes
    option-pricing model with the following assumptions: expected volatility of
    94%, dividend yield of 0%, risk-free interest rate of 5%, and expected life
    of 5 years.
 
                                       42
<PAGE>   45
 
OPTION EXERCISES AND FISCAL YEAR-END VALUES
 
     The following table provides certain information regarding fiscal 1998
stock option exercises by, and unexercised options held as of December 31, 1998
by, the Named Executive Officers.
 
AGGREGATED OPTION EXERCISES IN LAST FISCAL YEAR AND YEAR-END 1998 OPTION VALUES
 
<TABLE>
<CAPTION>
                                                                       NUMBER OF SECURITIES                VALUE OF
                                                                      UNDERLYING UNEXERCISED       UNEXERCISED IN THE MONEY
                                               SHARES                      OPTIONS HELD             OPTIONS AT FISCAL YEAR-
                                              ACQUIRED                 AT DECEMBER 31, 1998                 END(2)
                                                 ON       VALUE     ---------------------------   ---------------------------
                    NAME                      EXERCISE   REALIZED   EXERCISABLE   UNEXERCISABLE   EXERCISABLE   UNEXERCISABLE
                    ----                      --------   --------   -----------   -------------   -----------   -------------
<S>                                           <C>        <C>        <C>           <C>             <C>           <C>
Andrew C. Florance..........................       --          --     200,604         32,500       1,660,361       117,813
Frank A. Carchedi...........................       --          --      25,050         30,100         118,840       165,179
Curtis M. Ricketts..........................   48,480(1) $136,800(1)    24,620        12,500         156,528        45,313
David M. Schaffel...........................       --          --      32,120         20,000         183,715        72,500
</TABLE>
 
- ---------------
(1) In June 1998, Mr. Ricketts exercised unit options of one of our predecessors
    equivalent to 48,480 shares of our common stock. The value realized by this
    exercise is computed by subtracting the exercise price per equivalent share
    of our common stock from our estimate of the fair value.
 
(2) Calculated based on the amount by which the fair market value of the
    underlying security (assumed to be equal to its year-end closing price of
   $12 5/8 per share) exceeds the option exercise price.
 
STOCK OPTION PLAN
 
     Our Board of Directors adopted our 1998 Stock Option Plan prior to our
initial public offering. Our stockholders approved the plan at a specially
called meeting in June 1998. We have reserved 1,450,000 shares of our common
stock for issuance under the Stock Option Plan. Unless terminated sooner by the
Board of Directors, the Stock Option Plan will terminate in 2008.
 
     Our Board of Directors' Compensation Committee administers the Stock Option
Plan. Subject to provisions of the Stock Option Plan the Committee can:
 
          - select to whom to grant the options;
 
          - designate the number of shares to be covered by options;
 
          - specify the type of consideration someone exercising an option must
            pay us; and
 
          - establish all other terms and conditions of each option.
 
     The Stock Option Plan provides for the grant of stock options to our
officers and employees including those of subsidiaries. Options granted under
the Plan may be incentive or non-qualified stock options. The exercise price for
an option may not be less than the fair market value of our common stock on the
date of grant. Options granted under the plan may not be transferred other than
by will or by the laws of descent and distribution. If a "change of control" as
defined in the Stock Option Plan occurs (essentially, if our ownership changes
in a certain way), all outstanding unexercisable options under the Stock Option
Plan immediately become exercisable.
 
COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION
 
     The members of the Compensation Committee of the Board of Directors during
1998 were David Bonderman, Warren H. Haber, and Michael R. Klein, each of whom
serves as one of our non-employee directors.
 
                                       43
<PAGE>   46
 
     From time to time, these directors, or entities with which they are
affiliated, have engaged in certain transactions with us and our predecessors,
OLD RIG, Inc. and a partnership, Realty Information Group, L.P., to provide
additional equity or debt financing to fund our growth. OLD RIG operated our
business until November 1994. At that point, the partnership was organized to
hold and operate our business. Pursuant to a contribution agreement consummated
following our initial public offering in July 1998, the limited partners of the
partnership (other than OLD RIG) and all the stockholders of OLD RIG received
our common stock in exchange for their limited partnership units or OLD RIG
shares.
 
     Mr. Haber is chairman and chief executive officer of Founders Equity, Inc.
("Founders"). On May 15, 1995, Founders/RIG, LLC ("FR LLC"), an affiliate of
Founders, acquired units of the limited partnership for a total purchase price
of $3.1 million, equivalent to 898,856 shares of our common stock at an
effective price per share of $3.45. As part of the contractual arrangements that
accompanied this investment, Mr. Haber became a director and we agreed to
register the securities FR LLC received for resale upon its demand at a future
date. On December 3, 1996, FR LLC and certain of its affiliates acquired
additional units of the partnership for an aggregate purchase price of $1.06
million, equivalent to 259,521 shares of our common stock at an effective price
per share of $4.08. In addition, pursuant to the contribution agreement, FR
LLC's registration rights were amended. See "Description of Capital
Stock -- Registration Rights." FR LLC's right to designate a director terminated
upon consummation of the contribution agreement.
 
     At the time of the Founders' investment in OLD RIG and the partnership in
May 1995, those entities were indebted to Mr. Klein for loans he had extended
with a then balance of $751,961. In connection with Founders' investment,
$426,693 was repaid and the remaining balance of $325,268 was converted into
units of the partnership equivalent to 94,312 shares of our common stock at an
effective price per share of $3.45, the same effective price at which FR LLC
purchased its interest in that transaction. In connection with that same
transaction, our predecessors agreed to pay monthly fees to Founders of $10,000
and to Mr. Klein of $6,667. Both of those fee arrangements terminated in May
1998. During 1997, Mr. Klein committed to extend up to $1.0 million of credit to
OLD RIG, which in turn agreed to loan such amounts to the partnership to support
a $1.0 million credit facility the partnership secured with Silicon Valley Bank.
The OLD RIG loan to the partnership was contractually subordinated, and Mr.
Klein's loans to OLD RIG were structurally subordinated, to the bank loan,
interest on the balance was payable to OLD RIG and Mr. Klein at the same rate
(2% over prime) as the bank loan, and no principal could be repaid until the
bank loan was paid. This bank loan and the OLD RIG/Klein loan were repaid with
part of the proceeds of our initial public offering. As consideration for Mr.
Klein's commitment, a committee of three independent directors authorized the
issuance to Mr. Klein of warrants to purchase units of the partnership
equivalent to 45,450 shares of our stock at a price 10% less than the price at
which shares were offered in our initial public offering, exercisable during the
two years following the closing of that offering. We have, in the past, paid
legal fees to the law firm of which Mr. Klein is a partner. Under the policies
of his firm, Mr. Klein was not the partner responsible for supervising or
billing for the services provided to us.
 
     Effective as of March 5, 1998, all of the limited and general partners of
the partnership and all of the stockholders of OLD RIG entered into the
contribution agreement. Pursuant to this agreement, each limited partner of the
partnership (other than OLD RIG) agreed to contribute all of its limited
partnership units to us, and all of the stockholders of OLD RIG agreed to
contribute all of their shares of OLD RIG to us, all in exchange for 3.03 shares
of our common stock for each limited partnership unit or share of common stock.
Consummation of the contribution agreement occurred in July, 1998, following our
initial public offering.
 
                                       44
<PAGE>   47
 
                       PRINCIPAL AND SELLING STOCKHOLDERS
 
     The following table provides certain information regarding the beneficial
ownership of our shares as of April 1, 1999, and as adjusted to reflect the sale
of shares of common stock in this offering by:
 
        - each person we know to be the beneficial owner of more than 5% of the
          outstanding common stock;
 
        - each of our directors;
 
        - each Named Executive Officer;
 
        - all of our executive officers and directors as a group; and
 
        - all stockholders selling shares in this offering.
 
Except as indicated in the footnotes to the table, we believe that the persons
named in the table have sole voting and investment power with respect to the
indicated shares of stock:
 
<TABLE>
<CAPTION>
                                          SHARES BENEFICIALLY                  SHARES BENEFICIALLY
                                         OWNED BEFORE OFFERING    NUMBER OF    OWNED AFTER OFFERING
                                         ----------------------     SHARES     --------------------
           NAME & ADDRESS(1)               NUMBER      PERCENT    OFFERED(2)     NUMBER     PERCENT
           -----------------             -----------   --------   ----------   ----------   -------
<S>                                      <C>           <C>        <C>          <C>          <C>
Michael R. Klein(3)....................   2,123,385       21.6%     106,197     2,017,188     16.0%
Andrew C. Florance(4)..................     516,762        5.2       40,000       476,762      3.7
Frank A. Carchedi(5)...................      34,100          *           --        34,100        *
Curtis M. Ricketts(6)..................      73,100          *        5,000        68,100        *
David M. Schaffel(7)...................      62,420          *           --        62,420        *
David Bonderman........................     444,704        4.5           --       444,704      3.5
Warren Haber(8)........................     143,068        1.5           --       143,068      1.1
John Simon(9)..........................      92,248          *           --        92,248        *
Lanning Macfarland III(10).............     413,365        4.2           --       413,365      3.3
All Ten Executive Officers and
  Directors as a group(11).............   4,103,905       40.5      151,197     3,952,708     30.7
Other selling shareholders(12).........   1,576,678       16.1      448,803     1,127,875      9.0
</TABLE>
 
- ---------------
 *  Less than one percent.
 
(1)  Unless otherwise noted, each listed person's address is c/o Realty
     Information Group, Inc., 7475 Wisconsin Avenue, Bethesda, Maryland 20814.
 
(2)  The figures in this table are based on the assumption that the underwriters
     do not exercise their over-allotment option. If the underwriters exercise
     their over-allotment option in full, then the following shareholders will
     sell the indicated additional shares: Michael R. Klein (193,803), Andrew C.
     Florance (20,000), David M. Schaffel (5,000), and Warren Haber (14,202).
 
(3)  Includes 14,496 shares held as trustee for his nieces and 14,496 shares
     held by others as trustee for his children. Also includes warrants for the
     purchase of 45,450 shares of common stock. See "Certain Transactions."
 
(4)  Includes 200,604 shares issuable upon options exercisable within 60 days.
     Excludes 32,500 shares issuable upon options not exercisable within 60
     days.
 
(5)  Includes 30,100 shares issuable upon options exercisable within 60 days.
     Excludes 25,050 shares issuable upon options not exercisable within 60
     days.
 
(6)  Includes 24,620 shares issuable upon options exercisable within 60 days.
     Excludes 12,500 shares issuable upon options not exercisable within 60
     days.
 
(7)  Includes 32,120 shares issuable upon options exercisable within 60 days.
     Excludes 20,000 shares issuable upon options not exercisable within 60
     days.
 
(8)  Includes 18,846 held by Mr. Haber's spouse and excludes 46,128 shares held
     by Mr. Haber's adult children for which Mr. Haber disclaims personal
     beneficial ownership.
 
(9)  Excludes 152,752 shares held by Allen & Company Incorporated (of which Mr.
     Simon is a Managing Director) and certain of its other officers and
     affiliates; Mr. Simon disclaims personal beneficial ownership of such
     shares. See "Certain Transactions." Mr. Simon's address is c/o Allen &
     Company Incorporated, 711 Fifth Avenue, New York, New York 10022.
 
(10) Includes 410,335 shares held by Law Bulletin Publishing Company.
 
(11) Includes 308,644 shares issuable upon options exercisable within 60 days.
     Excludes 173,700 shares issuable upon options not exercisable within 60
     days.
 
(12) Includes the following stockholders and, for each, the shares to be sold in
     the offering: BRAC Associates LLC (50,000), Brown University Third Century
     Fund (45,970), Donald Carlin (101,197), Enterprise RIG Associates (40,000),
     Horowitz Brothers 1975 Trust (43,000), John Teeger (23,196), Roderick
     Turner (27,787), and others who, in the aggregate, own fewer than 1% of
     outstanding shares. None of the shares beneficially owned prior to the
     offering by anyone in the prior list are issuable upon exercise of options
     or warrants.
 
                                       45
<PAGE>   48
 
                              CERTAIN TRANSACTIONS
 
     Since January 1, 1996, some of our executive officers or directors have
engaged in the following transactions with us in addition to those described
above under "Management -- Compensation Committee Interlocks and Insider
Participation."
 
     John Simon is a managing director of Allen & Company Incorporated (one of
the underwriters of this offering) and is one of our directors. On December 3,
1996, RIG Holdings, LLC ("RH LLC") acquired units of Realty Information Group
L.P. (the predecessor partnership that previously operated our business), for an
aggregate purchase price of $2.9 million, equivalent to 710,388 shares of our
common stock at an effective price per share of $4.08. RH LLC was granted the
right to designate one member of the board of directors of OLD RIG (a partner in
RIG LP), as well as certain registration rights in regards to the units it
purchased. Pursuant to the contribution agreement, RH LLC's registration rights
were amended. See "Description of Capital Stock -- Registration Rights." Prior
to our initial public offering, Allen & Company Incorporated was the Member-
Manager of RH LLC and, together with certain of its officers and affiliates, was
the owner of approximately 26% of RH LLC; as Member-Manager, Allen & Company
Incorporated was entitled to exercise voting power over all of the limited
partnership units of the partnership then held by RH LLC. For these reasons, RH
LLC may be deemed to have been an affiliate of Allen & Company Incorporated. RH
LLC's (and its members') right to designate a director of OLD RIG terminated
upon consummation of the contribution agreement, at which time RH LLC was
dissolved and its ownership interests (and the associated registration rights)
distributed pro rata to its members. At that time, Allen & Company Incorporated,
together with certain of its officers and affiliates, became the beneficial
owner of 183,721 shares of our stock. Prior to making this investment, on
November 5, 1996, Allen & Company Incorporated had loaned the partnership
$250,000, bearing interest at a rate of 8.5% per year. This loan was paid off in
connection with RH LLC's investment.
 
     Lanning Macfarland III is head of real estate publications at Law Bulletin
Publishing Company ("LBPC") and one of our directors. On March 29, 1996, the
partnership acquired all of the assets of Chicago ReSource from LBPC for units
of the partnership valued nominally at a price equivalent to 347,361 shares of
our common stock at an effective price per share of $3.45. Chicago ReSource was
a real estate information provider in the Chicago, Illinois area. On December 3,
1996, LBPC and certain of its affiliates acquired additional units of the
partnership for an aggregate purchase price of $288,000, equivalent to 70,548
shares of our common stock at an effective price per share of $4.08. In
addition, pursuant to the contribution agreement, LBPC's registration rights
were amended. See "Description of Capital Stock -- Registration Rights." LBPC's
right to designate a director of OLD RIG have terminated.
 
     Fred A. Heitzman III was an officer, director, and beneficial stockholder
of LeaseTrend, Inc., which merged, effective January 8, 1999, with a subsidiary
we formed for that purpose. The total consideration we paid to LeaseTrend
stockholders in connection with the merger was $4.5 million in cash and 566,671
shares of our common stock. Of this consideration, a trust of which Mr. Heitzman
was the sole beneficiary received $1,684,074 in cash and 174,503 shares of our
common stock.
 
                                       46
<PAGE>   49
 
                          DESCRIPTION OF CAPITAL STOCK
 
     Our authorized capital stock consists of 30,000,000 shares of common stock,
par value $.01 per share, and 2,000,000 shares of preferred stock, par value
$.01 per share.
 
COMMON STOCK
 
     We are authorized to issue 30,000,000 shares of common stock. As of April
1, 1999, we had outstanding 9,785,729 shares of common stock held of record by a
total of 84 holders. Upon the completion of this offering, we will have
12,535,729 shares of common stock outstanding. Each stockholder of record is
entitled to one vote for each outstanding share of common stock he or she owns.
The holders of common stock are entitled to receive ratably any dividends that
our Board of Directors declares. In the event of our liquidation, dissolution,
or winding up, holders of common stock will have the right to a ratable portion
of assets remaining after payment of liabilities. Holders of our common stock
have neither preemptive rights nor rights to convert their common stock into any
other securities. They are not subject to future calls or assessments by us.
There are no redemption or sinking fund provisions applicable to the common
stock. All outstanding shares of common stock are, and the shares offered in
this prospectus will be upon issuance and sale, fully paid and non-assessable.
 
PREFERRED STOCK
 
     We are authorized to issue 2,000,000 shares of preferred stock in one or
more series. As of April 1, 1999, we had no outstanding shares of preferred
stock. The rights, preferences, privileges, and restrictions, including dividend
rights, voting rights, terms of redemption, retirement, sinking fund provisions,
liquidation preferences, conversion rights, and exchange rights, if any, of the
preferred stock of each series will be fixed by our Board of Directors or its
duly authorized committee.
 
REGISTRATION RIGHTS
 
     We have granted some of our stockholders rights concerning the registration
of their shares under the Securities Act. Holders of a total of 3,169,948 shares
have "piggyback" registration rights to request that we register any of their
shares if we propose to register any of our securities under the Securities Act
(other than a registration effected solely to implement an employee benefit plan
or a transaction to which Rule 145 of the Securities and Exchange Commission
applies). However, if these piggyback rights are exercised in connection with an
underwritten public offering of our common stock, the managing underwriter of
the offering has the right to exclude or otherwise limit the number of these
type of shares to be included. The former shareholders of Jamison Research,
Inc., which we acquired in January 1999, have rights that require us to register
their 448,031 shares in two registrations beginning in July 2000. Additionally,
the successors to Founders/RIG LLC and RIG Holdings, LLC share a "demand"
registration right to require us to prepare and file a registration statement to
permit a public offering and sale of their shares of common stock, if at least
20% of the shares covered by the registration rights demand that registration.
 
DELAWARE LAW AND CERTAIN CHARTER AND BY-LAW PROVISIONS
 
     Section 203 of Delaware General Corporation Law.  We are subject to certain
provisions of Delaware law that may discourage a third party from acquiring us.
Section 203 of the Delaware General Corporation Law ("DGCL") prohibits certain
transactions between a Delaware corporation and an "interested stockholder."
This term is defined as a person who, together with certain provisions of
Delaware law that may discourage a third party from acquiring us. Section 203
prohibits
 
                                       47
<PAGE>   50
 
certain transactions between a Delaware corporation and an "interested
stockholder." This term is defined as a person who, together with any affiliates
or associates of that person, beneficially owns, directly or indirectly, 15% or
more of the outstanding voting shares of a Delaware corporation. This provision
prohibits certain business combinations between an interested stockholder and a
corporation for three years after the date the interested stockholder becomes an
interested stockholder, unless:
 
     - the business combination is approved by the corporation's board of
       directors before the interested stockholder becomes an interested
       stockholder;
 
     - the interested stockholder acquired at least 85% of the voting stock of
       the corporation in the transaction in which it became an interested
       stockholder; or
 
     - the business combination is approved by a majority of the board of
       directors and by the affirmative vote of 66 2/3% of the outstanding
       voting stock that is not owned by the interested stockholder.
 
     Anti-takeover Provisions.  Our Certificate of Incorporation also contains
provisions that may discourage a third party from proposing to acquire us. Among
other things, it permits our Board of Directors, but not our stockholders, to
fill vacancies and newly-created directorships. It also provides that any action
to be taken by our stockholders must be taken at a meeting of stockholders and
not by any written stockholder consent. Only our Board of Directors may call
special meetings of stockholders. These provisions would make the removal of
incumbent directors more difficult and time-consuming. They may discourage a
tender offer or other takeover attempt not approved by our Board of Directors.
 
     Indemnification and Limitation of Liability.  Our Certificate of
Incorporation provides that we shall, subject to certain limitations, indemnify
our directors and officers against expenses (including attorneys' fees,
judgments, fines and certain settlements) reasonably incurred by them as a party
to any suit or proceeding involving their actions as our directors or officers.
They must have acted in good faith and in a manner they reasonably believed to
be in or not opposed to our best interests. If a criminal action or proceeding
is involved, they also must have had no reasonable cause to believe their
conduct to have been unlawful.
 
     Section 102 of the DGCL permits a Delaware corporation to include in its
certificate of incorporation a provision eliminating or limiting a director's
liability to a corporation or its stockholders for damages for breaches of
fiduciary duty. DGCL Section 102 provides, however, that liability for breaches
of the duty of loyalty, acts or omissions not in good faith or involving
intentional misconduct, or knowing violation of the law, and the unlawful
purchase or redemption of stock or payment of unlawful dividends or the receipt
of improper personal benefits cannot be eliminated or limited in this manner.
Our Certificate of Incorporation includes a provision which eliminates, to the
fullest extent permitted, director liability for damages for breaches of
fiduciary duty.
 
     Preferred Stock.  We have the authority to issue up to 2,000,000 shares of
so-called "blank-check" preferred stock. The Board of Directors could give this
preferred stock voting or conversion rights that could adversely affect the
voting power of the holders of common stock and delay or prevent a change of
control of us. No shares of preferred stock are currently outstanding. We have
no current intention to issue any shares of preferred stock.
 
TRANSFER AGENT AND REGISTRAR
 
     The transfer agent and registrar for our common stock is American Stock
Transfer & Trust Company.
 
                                       48
<PAGE>   51
 
                                  UNDERWRITING
 
     Subject to the terms and conditions of an Underwriting Agreement, dated as
of May 5, 1999, the underwriters named below, who are represented by Donaldson,
Lufkin & Jenrette Securities Corporation, BT Alex. Brown Incorporated, and Allen
& Company Incorporated, have severally agreed to purchase from Realty
Information Group, Inc. and the selling stockholders the respective number of
shares of common stock set forth opposite their names below.
 
<TABLE>
<CAPTION>
                                                                NUMBER
                        UNDERWRITERS                          OF SHARES
                        ------------                          ----------
<S>                                                           <C>
Donaldson, Lufkin & Jenrette Securities Corporation.........   1,099,488
BT Alex. Brown Incorporated.................................   1,099,487
Allen & Company Incorporated................................   1,099,487
Needham & Company, Inc......................................      51,538
                                                              ----------
          Total.............................................   3,350,000
                                                              ==========
</TABLE>
 
     The underwriting agreement provides that the obligations of the several
underwriters to purchase and accept delivery of the shares of common stock
offered in this prospectus are subject to approval by their counsel of certain
legal matters and to certain other conditions. The underwriters are obligated to
purchase and accept delivery of all the shares of common stock offered in this
prospectus (other than those shares covered by the over-allotment option
described below) if any are purchased.
 
     The underwriters initially propose to offer the shares of common stock in
part directly to the public at the public offering price set forth on the cover
page of this prospectus and in part to certain dealers (including the
underwriters) at such price less a concession not in excess of $1.10 per share.
The underwriters may allow, and such dealers may re-allow, to certain other
dealers a concession not in excess of $0.10 per share. After the initial
offering of the common stock, the public offering price and other selling terms
may be changed by the representatives of the underwriters at any time without
notice.
 
     Realty Information Group and some of the selling stockholders have granted
to the underwriters an option, exercisable within 30 days after the date of this
prospectus, to purchase, from time to time, in whole or in part, up to an
aggregate of 502,500 additional shares of common stock at the public offering
price less underwriting discounts and commissions. The underwriters may exercise
such option solely to cover overallotments, if any, made in connection with the
offering. To the extent that the underwriters exercise that option, each
underwriter will become obligated, subject to certain conditions, to purchase
its pro rata portion of the additional shares based on that underwriter's
percentage underwriting commitment as indicated in the preceding table.
 
     Realty Information Group and the selling stockholders have agreed to
indemnify the underwriters against certain liabilities, including liabilities
under the Securities Act, or to contribute to payments that the underwriters may
be required to make in respect thereof.
 
     Each of Realty Information Group, its executive officers and directors, and
certain stockholders of Realty Information Group, including the selling
stockholders, has agreed, subject to certain exceptions, not to:
 
          - offer, pledge, sell, contract to sell, sell any option or contract
            to purchase, purchase any option or contract to sell, grant any
            option, right or warrant to purchase or otherwise transfer or
            dispose of, directly or indirectly, any shares of common stock or
            any securities convertible into or exercisable or exchangeable for
            common stock; or
 
                                       49
<PAGE>   52
 
          - enter into any swap or other arrangement that transfers all or a
            portion of the economic consequences associated with the ownership
            of any common stock for a period of 90 days after the date of this
            prospectus without the prior written consent of Donaldson, Lufkin &
            Jenrette Securities Corporation.
 
     In addition, subject to certain exceptions, during the 90 days after the
date of this prospectus, Realty Information Group has also agreed not to file
any registration statement with respect to, and each of its executive officers,
directors and certain stockholders of Realty Information Group, including the
selling stockholders, has agreed not to make any demand for, or exercise any
right with respect to, the registration of any shares of common stock or any
securities convertible into or exercisable or exchangeable for common stock
without Donaldson, Lufkin & Jenrette Securities Corporation's prior written
consent.
 
     Other than in the United States, no action has been taken by Realty
Information Group, the selling stockholders or the underwriters that would
permit a public offering of the shares of common stock offered in this
prospectus in any jurisdiction where action for that purpose is required. The
shares of common stock offered in this prospectus may not be offered or sold,
directly or indirectly, nor may this prospectus or any other offering material
or advertisements in connection with the offer and sale of any of these shares
of common stock be distributed or published in any jurisdiction, except under
circumstances that will result in compliance with the applicable rules and
regulations of such jurisdiction. You should inform yourself about and observe
any restrictions relating to the offering of the common stock and the
distribution of this prospectus. This prospectus does not constitute an offer to
sell or a solicitation of an offer to buy any shares of common stock offered in
this prospectus in any jurisdiction in which such an offer or a solicitation is
unlawful.
 
     The underwriters and dealers may engage in passive market making
transactions in the common stock in accordance with Rule 103 of Regulation M
promulgated by the Securities and Exchange Commission. In general, a passive
market maker may not bid for or purchase shares of common stock at a price that
exceeds the highest independent bid. In addition, the net daily purchases made
by any passive market maker generally may not exceed 30% of its average daily
trading volume in the common stock during a specified two month prior period, or
200 shares, whichever is greater. A passive market maker must identify passive
market making bids as such on the Nasdaq electronic inter-dealer reporting
system. Passive market making may stabilize or maintain the market price of the
common stock above independent market levels. Underwriters and dealers are not
required to engage in passive market making and may end passive market making
activities at any time.
 
     In connection with the offering, the underwriters may engage in
transactions that stabilize, maintain or otherwise affect the price of the
common stock. Specifically, the underwriters may overallot the offering,
creating a syndicate short position. The underwriters may bid for and purchase
shares of common stock in the open market to cover such syndicate short position
or to stabilize the price of the common stock. These activities may stabilize or
maintain the market price of the common stock above independent market levels.
The underwriters are not required to engage in these activities, and may end any
of these activities at any time.
 
     Allen & Company Incorporated, together with certain of its officers and
affiliates, beneficially owns an aggregate of 152,752 shares of common stock.
See "Certain Transactions." In addition, John Simon, a director of Realty
Information Group and a Managing Director of Allen & Company Incorporated,
together with his wife and trusts for the benefit of his children, beneficially
owns an aggregate of 92,248 shares of common stock. See "Principal and Selling
Stockholders." Because of his position as a Managing Director, Mr. Simon may be
deemed to be a beneficial owner of the shares of common stock owned by Allen &
Company Incorporated.
 
                                       50
<PAGE>   53
 
     An officer of Donaldson, Lufkin & Jenrette Securities Corporation is the
beneficial owner of 54,620 shares of common stock.
 
                                 LEGAL MATTERS
 
     The validity of the common stock we are offering in this prospectus will be
passed upon for us by Shea & Gardner, Washington, D.C. Certain legal matters in
connection with the offering will be passed upon for the underwriters by Akin,
Gump, Strauss, Hauer & Feld, L.L.P.
 
                                    EXPERTS
 
     Ernst & Young LLP, independent auditors, have audited our consolidated
financial statements and the financial statements of LeaseTrend, Inc. and
Jamison Research, Inc. included in this prospectus and registration statement
for the years ended December 31, 1998, as set forth in their reports, which
appear elsewhere in this prospectus. Our consolidated financial statements and
the financial statements of LeaseTrend, Inc. and Jamison Research, Inc. are
included in reliance of their reports, given on their authority as experts in
accounting and auditing.
 
                             ADDITIONAL INFORMATION
 
     We have filed with the Securities and Exchange Commission, Washington, D.C.
20549, a registration statement on Form S-1 under the Securities Act with
respect to shares of common stock offered in this prospectus. This prospectus
does not contain all of the information set forth in the registration statement,
certain portions of which we have omitted as permitted by the rules and
regulations of the SEC. For further information about us and the common stock
offered in this prospectus, you may refer to that registration statement and to
the exhibits and schedules we filed with it. Statements contained in this
prospectus regarding the contents of any contract or other documents referred to
are not necessarily complete, and in each instance reference is made to the copy
of the contract or other document filed as an exhibit to the registration
statement, and each such statement is qualified in its entirety by that
reference.
 
     You may inspect the registration statement, including all exhibits and
schedules to it, without charge at the Public Reference Room at the principal
office of the SEC, 450 Fifth Street, N.W., Washington, D.C. 20549, and at the
regional offices of the SEC located at Citicorp Center, 500 West Madison Street,
Suite 1400, Chicago, Illinois 60661-2511 and at Seven World Trade Center, Suite
1300, New York, New York 10048, and you may obtain copies of all or any part of
the registration statement from those offices upon the payment of the prescribed
fees. You may obtain information on the operation of the Public Reference Room
by calling the SEC at 1-800-SEC-0330. In addition, electronically filed
documents, including reports and other information about us, can be obtained
from the SEC's Website at: http://www.sec.gov. Our common stock is quoted on the
Nasdaq National Market. You may inspect reports and other information about us
at the offices of Nasdaq Operations, 1735 K Street, N.W., Washington, D.C.
20006.
 
     We are subject to the reporting requirements of the Securities Exchange Act
of 1934 and, in accordance with that Act, we file reports, proxy statements, and
other information with the SEC. We intend to furnish our stockholders with
annual reports containing financial statements audited by independent
accountants, quarterly reports containing unaudited financial statements for the
first three quarters of each fiscal year, and other periodic reports as we may
deem appropriate or as we may be required by law.
 
                                       51
<PAGE>   54
 
                         REALTY INFORMATION GROUP, INC.
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<S>                                                           <C>
REALTY INFORMATION GROUP, INC. UNAUDITED PRO FORMA CONDENSED
CONSOLIDATED FINANCIAL STATEMENTS
Introduction to Unaudited Pro Forma Condensed Consolidated
  Financial Statements......................................   F-2
Unaudited Pro Forma Condensed Consolidated Statement of
  Operations................................................   F-3
Unaudited Pro Forma Condensed Consolidated Balance Sheet....   F-4
Notes to Unaudited Pro Forma Condensed Consolidated
  Financial Statements......................................   F-5
REALTY INFORMATION GROUP, INC.
Report of Independent Auditors..............................   F-7
Consolidated Statements of Operations.......................   F-8
Consolidated Balance Sheets.................................   F-9
Consolidated Statements of Stockholders' Equity.............  F-10
Consolidated Statements of Cash Flows.......................  F-11
Notes to Consolidated Financial Statements..................  F-12
LEASETREND, INC.
Report of Independent Auditors..............................  F-23
Statements of Operations....................................  F-24
Balance Sheets..............................................  F-25
Statements of Stockholders' Deficit.........................  F-26
Statements of Cash Flows....................................  F-27
Notes to Financial Statements...............................  F-28
JAMISON RESEARCH, INC.
Report of Independent Auditors..............................  F-32
Statements of Operations....................................  F-33
Balance Sheets..............................................  F-34
Statements of Stockholders' Deficit.........................  F-35
Statements of Cash Flows....................................  F-36
Notes to Financial Statements...............................  F-37
</TABLE>
 
                                       F-1
<PAGE>   55
 
                         REALTY INFORMATION GROUP, INC.
 
                      INTRODUCTION TO UNAUDITED PRO FORMA
                  CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
 
     The following unaudited pro forma condensed consolidated financial
statements give effect to the acquisitions subsequent to December 31, 1998 by
Realty Information Group, Inc. (the "Company") of the common stock of
LeaseTrend, Inc. ("LTI") and Jamison Research, Inc. ("JRI") in exchange for cash
raised by the Company in its initial public offering on July 1, 1998 and common
stock of the Company.
 
     The unaudited pro forma condensed consolidated balance sheet gives effect
to the acquisitions as if they had occurred on December 31, 1998. The unaudited
pro forma condensed consolidated statement of operations gives effect to the
acquisitions as if they had occurred on January 1, 1998.
 
     The pro forma adjustments are based on estimates, available information and
certain assumptions and may be revised, as additional information becomes
available. The pro forma financial information does not necessarily represent
what the Company's financial position or results of operations would actually
have been if such transactions in fact had occurred on those dates or the
results of operations for any future period. The unaudited pro forma condensed
consolidated financial statements should be read in conjunction with
Management's Discussion and Analysis of Financial Condition and Results of
Operations and the other financial statements and notes thereto included
elsewhere in this Prospectus.
 
                                       F-2
<PAGE>   56
 
                         REALTY INFORMATION GROUP, INC.
 
       UNAUDITED PRO FORMA CONDENSED CONSOLIDATED STATEMENT OF OPERATIONS
                            AS OF DECEMBER 31, 1998
 
<TABLE>
<CAPTION>
                                           REALTY                                      PRO FORMA
                                         INFORMATION   LEASETREND,      JAMISON       ADJUSTMENTS       PRO FORMA
                                         GROUP, INC.      INC.       RESEARCH, INC.   (SEE NOTE 3)     CONSOLIDATED
                                         -----------   -----------   --------------   ------------     ------------
<S>                                      <C>           <C>           <C>              <C>              <C>
Revenues...............................  $13,900,165   $3,444,969      $4,577,927              --      $21,923,061
Cost of revenues.......................    4,561,619    1,310,994       1,658,072     $   680,000(a)     8,210,685
                                         -----------   ----------      ----------     -----------      -----------
  Gross margin.........................    9,338,546    2,133,975       2,919,855        (680,000)      13,712,376
Operating expenses.....................   12,864,612    2,432,767       3,077,494       2,090,000(a)    20,464,873
                                         -----------   ----------      ----------     -----------      -----------
  Income (loss) from operations........   (3,526,066)    (298,792)       (157,639)     (2,770,000)      (6,752,497)
Other income (expense).................      340,653     (433,689)         (9,263)        198,622(b)        96,323
Benefit from income taxes..............           --           --          47,700         (47,700)(c)           --
                                         -----------   ----------      ----------     -----------      -----------
  Net loss.............................  $(3,185,413)  $ (732,481)     $ (119,202)    $(2,619,078)     $(6,656,174)
                                         ===========   ==========      ==========     ===========      ===========
Net loss per share -- basic and
  diluted..............................  $     (0.44)                                                  $     (0.76)
                                         ===========                                                   ===========
Weighted average shares outstanding....    7,213,037                                                     8,771,072
                                         ===========                                                   ===========
</TABLE>
 
See accompanying notes.
 
                                       F-3
<PAGE>   57
 
                         REALTY INFORMATION GROUP, INC.
            UNAUDITED PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                            AS OF DECEMBER 31, 1998
 
<TABLE>
<CAPTION>
                                 REALTY                       JAMISON        PRO FORMA
                               INFORMATION   LEASETREND,     RESEARCH,      ADJUSTMENTS       PRO FORMA
                               GROUP, INC.      INC.            INC.        (SEE NOTE 3)     CONSOLIDATED
                               -----------   -----------   --------------   ------------     ------------
<S>                            <C>           <C>           <C>              <C>              <C>
ASSETS
Cash and cash equivalents....  $19,666,887   $    18,266      $ 50,548      $(10,071,409)(d) $ 9,664,292
Accounts receivable, net.....    1,245,579        12,316        32,426                --       1,290,321
Prepaid expenses and other
  current assets.............      325,629         6,786       173,900          (173,800)(d)     332,515
                               -----------   -----------      --------      ------------     -----------
          Total current
            assets...........   21,238,095        37,368       256,874       (10,245,209)     11,287,128
Property and equipment,
  net........................    2,156,928       142,967       201,617                --       2,501,512
Capitalized product
  development costs, net.....    1,856,873       157,867        59,484         2,582,649(d)    4,656,873
Other assets, net............    2,097,656       117,615            --        17,582,385(d)   19,797,656
Deposits.....................      192,060         2,805           474                --         195,339
                               -----------   -----------      --------      ------------     -----------
          Total assets.......  $27,541,612   $   458,622      $518,449      $  9,919,825     $38,438,508
                               ===========   ===========      ========      ============     ===========
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable and accrued
  expenses...................  $ 2,691,143   $   291,958      $130,319                --     $ 3,113,420
Deferred revenue.............    1,647,165       560,463       404,741                --       2,612,369
Accrued fees and
  interest-related parties...           --     1,229,861            --      $ (1,229,861)(d)          --
Line of credit...............           --            --       114,912          (114,912)(d)          --
Subordinated debt to
  partner....................           --            --            --                                --
Advances from stockholders...           --     1,428,521            --        (1,428,521)(d)          --
Current portion of long-term
  debt.......................           --        66,401        26,114           (92,515)(d)          --
                               -----------   -----------      --------      ------------     -----------
          Total current
            liabilities......    4,338,308     3,577,204       676,086        (2,865,809)      5,725,789
Long-term debt, net of
  current portion............           --            --        10,603           (10,603)(d)          --
                                                                               3,286,822(d)
Stockholders' equity.........   23,203,304    (3,118,582)     (168,240)        9,509,415(d)   32,712,719
                               -----------   -----------      --------      ------------     -----------
          Total liabilities
            and stockholders'
            equity...........  $27,541,612   $   458,622      $518,449      $  9,919,825     $38,438,508
                               ===========   ===========      ========      ============     ===========
</TABLE>
 
See accompanying notes.
 
                                       F-4
<PAGE>   58
 
                         REALTY INFORMATION GROUP, INC.
 
                          NOTES TO UNAUDITED PRO FORMA
                  CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
 
1. GENERAL
 
     The historical financial statements included in the unaudited pro forma
condensed consolidated balance sheet and statement of operations were derived
from the separate financial statements of the Company and its subsidiaries LTI
and JRI as of December 31, 1998 and for the year then ended. The related audited
historical financial statements are included elsewhere herein and should be read
in conjunction with these unaudited pro forma condensed consolidated financial
statements.
 
2. ACQUISITION OF LTI AND JRI
 
     On January 8, 1999, the Company acquired all of the common stock of LTI, 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 common stock of JRI, an Atlanta based
provider of commercial real estate information, for $5,284,000 in cash and
448,031 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.
 
     The Company will adjust the historical carrying value of the acquired
assets and liabilities of LTI and JRI to fair market value as discussed below.
The allocation amounts and classifications are estimates, based on the current
operations of LTI and JRI and the recorded book values of assets and liabilities
at December 31, 1998. The actual allocations may vary based on the carrying
value of the acquired assets and liabilities at the respective closing dates.
Working capital and property and equipment accounts of LTI and JRI are recorded
at book value, and represent an increase in amounts allocated to the accounts
shown below of approximately $600,000 and $400,000, respectively. The
approximate allocation of purchase price to capitalized product development
costs and intangible assets (including amounts previously capitalized by LTI and
JRI) is as follows:
 
<TABLE>
<CAPTION>
                                                      ESTIMATED VALUE
                                           --------------------------------------    ESTIMATED
                                              LTI           JRI         TOTALS         LIFE
                                           ----------   -----------   -----------    ---------
<S>                                        <C>          <C>           <C>            <C>
Capitalized product development
     Developed software products.........  $  200,000   $   200,000   $   400,000     2 years
     Proprietary databases...............   1,100,000     1,300,000     2,400,000     5 years
Customer base............................   8,100,000     8,800,000    16,900,000    10 years
Other intangible assets..................     400,000       400,000       800,000     2 years
                                           ----------   -----------   -----------
          Total..........................  $9,800,000   $10,700,000   $20,500,000
                                           ==========   ===========   ===========
</TABLE>
 
     Capitalized product development includes those developed software products
and proprietary databases which are expected to produce revenues currently,
until their conversion by the Company into products with a format consistent
with the Company's products. This effort is expected to take up to 2 years. The
underlying proprietary databases are expected to continue in use beyond the
conversion period.
 
                                       F-5
<PAGE>   59
                         REALTY INFORMATION GROUP, INC.
 
                          NOTES TO UNAUDITED PRO FORMA
           CONDENSED CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
3. PRO FORMA ADJUSTMENTS
 
     The pro forma adjustments reflect the consolidation of the Company and its
subsidiaries, LTI and JRI. The adjustments are as follows:
 
     Pro forma condensed consolidated statement of operations:
 
          (a) Estimated charges for amortization of the assets noted above,
     amounting to $680,000 to cost of sales for product amortization and
     $2,090,000 to operating expenses for the year ended December 31, 1998.
 
          (b) Interest expense on borrowings of the subsidiaries of $448,622 is
     eliminated as a result of the repayment of all current and long term debt.
     Interest income of $250,000 is eliminated as a result of the cash used to
     purchase LTI and JRI from the initial public offering proceeds on July 1,
     1997.
 
          (c) Tax benefits of JRI are eliminated due to ongoing operating losses
     of the Company.
 
     Pro forma condensed combined balance sheet:
 
          (d) - Cash and cash equivalents.  Reduction of cash for a total of
                $10,071,409 comprised of amounts paid in cash for LTI and JRI
                totalling $9,784,000, expenses of $135,780 and repayment of JRI
                debt totalling $151,629;
 
              - Prepaid expenses and other current assets.  Deferred tax assets
                totalling $173,800 are eliminated;
 
              - Capitalized product development costs, net.  Allocation of
                $2,800,000 of capitalized product development, less amounts
                recorded on LTI and JRI of $157,867 and $59,484;
 
              - Other assets, net.  Allocation of $17,700,000 for customer base
                and other intangible assets of LTI and JRI, less amounts
                recorded on LTI of $117,615.
 
              - Accrued fees and interest and short and long term debt.  Accrued
                fees and interest, advances from stockholders, and current
                portion of long term debt of LTI are repaid by the former
                shareholders of LTI from the consideration of the acquisition.
                Line of credit, current portion of long term debt and long term
                debt of JRI are repaid by the Company at closing.
 
              - Stockholders' equity.  The deficits of LTI and JRI, totalling
                $3,118,582 and $168,240, respectively, are eliminated for a
                total increase in stockholders' equity of $3,286,822. The stock
                portion of the consideration totalling $9,509,415 for both LTI
                and JRI is recorded.
 
4. PRO FORMA WEIGHTED AVERAGE SHARES OUTSTANDING
 
     Pro forma weighted average shares include 1,014,702 shares assumed
outstanding for the full year in connection with the LTI and JRI acquisitions
and 543,333 weighted average shares which reflects the assumed effect of using
cash raised in the initial public offering to acquire these entities on January
1, 1998. Stock options and warrants outstanding have been excluded from the
calculation because their effect is anti-dilutive.
 
                                       F-6
<PAGE>   60
 
                         REPORT OF INDEPENDENT AUDITORS
 
Board of Directors
Realty Information Group, Inc.
 
We have audited the accompanying consolidated balance sheets of Realty
Information Group. Inc. as of December 31, 1997 and 1998, and the related
consolidated statements of operations, stockholders' equity and cash flows for
each of the three years in the period ended December 31, 1998. 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 generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the financial statements referred to above present fairly, in
all material respects, the consolidated financial position of Realty Information
Group, Inc. at December 31, 1997 and 1998, and the consolidated results of their
operations and their cash flows for each of the three years in the period ended
December 31, 1998, in conformity with generally accepted accounting principles.
 
                                          /s/ ERNST & YOUNG LLP
 
Washington, D.C.
February 12, 1999
 
                                       F-7
<PAGE>   61
 
                         REALTY INFORMATION GROUP, INC.
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                             YEAR ENDED DECEMBER 31,
                                                     ---------------------------------------
                                                        1996          1997          1998
                                                     -----------   -----------   -----------
<S>                                                  <C>           <C>           <C>
Revenues...........................................  $ 4,335,966   $ 7,899,940   $13,900,165
Cost of revenues...................................    2,188,136     3,412,593     4,561,619
                                                     -----------   -----------   -----------
Gross margin.......................................    2,147,830     4,487,347     9,338,546
Operating expenses:
Selling and marketing..............................    2,711,823     4,373,914     7,240,442
Software development...............................      254,177       395,077       704,194
General and administrative.........................    1,863,236     3,017,439     4,919,976
                                                     -----------   -----------   -----------
                                                       4,829,236     7,786,430    12,864,612
                                                     -----------   -----------   -----------
Loss from operations...............................   (2,681,406)   (3,299,083)   (3,526,066)
Other income (expense):
Interest expense...................................       (2,323)      (26,421)     (119,716)
Interest income....................................       29,642        48,743       460,369
Other income.......................................       21,858        11,215            --
                                                     -----------   -----------   -----------
Loss before income taxes...........................   (2,632,229)   (3,265,546)   (3,185,413)
Provision for income taxes.........................           --            --            --
                                                     -----------   -----------   -----------
Net loss...........................................  $(2,632,229)  $(3,265,546)  $(3,185,413)
                                                     ===========   ===========   ===========
Net loss per share -- basic and diluted............  $     (0.60)  $     (0.57)  $     (0.44)
                                                     ===========   ===========   ===========
Weighted average common shares.....................    4,387,590     5,722,432     7,213,037
                                                     ===========   ===========   ===========
</TABLE>
 
See accompanying notes.
 
                                       F-8
<PAGE>   62
 
                         REALTY INFORMATION GROUP, INC.
 
                          CONSOLIDATED BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                     DECEMBER 31,
                                                              ---------------------------
                                                                  1997           1998
                                                              ------------   ------------
<S>                                                           <C>            <C>
ASSETS
Current assets:
  Cash and cash equivalents.................................  $  1,068,835   $ 19,666,887
  Accounts receivable, less allowance for doubtful accounts
     of $151,000 and $326,000 as of December 31, 1997 and
     1998...................................................     1,021,345      1,245,579
  Prepaid expenses and other current assets.................        26,601        325,629
                                                              ------------   ------------
Total current assets........................................     2,116,781     21,238,095
Property and equipment:
  Leasehold improvements....................................       111,623        125,895
  Furniture and equipment...................................       623,417      1,031,332
  Computer hardware and software............................     1,366,687      2,228,166
                                                              ------------   ------------
                                                                 2,101,727      3,385,393
Accumulated depreciation....................................      (799,763)    (1,228,465)
                                                              ------------   ------------
                                                                 1,301,964      2,156,928
Capitalized product development costs, net of accumulated
  amortization of $514,000 and $990,000 as of December 31,
  1997 and 1998.............................................     1,261,974      1,856,873
Other assets................................................     1,796,356      2,097,656
Deposits....................................................       104,510        192,060
                                                              ------------   ------------
Total assets................................................  $  6,581,585   $ 27,541,612
                                                              ============   ============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable..........................................  $    355,416   $    800,941
  Accrued wages and commissions.............................       368,667      1,077,952
  Accrued expenses..........................................       387,428        812,250
  Deferred revenue..........................................       902,575      1,647,165
  Line of credit............................................     1,000,000             --
  Subordinated debt to stockholder..........................       650,000             --
                                                              ------------   ------------
Total current liabilities...................................     3,664,086      4,338,308
Stockholders' equity:
  Preferred stock, $.01 par value, 2,000,000 shares
     authorized, none outstanding...........................            --             --
  Common stock, $.01 par value; 30,000,000 shares
     authorized; 5,754,017 and 8,771,027 issued and
     outstanding as of December 31, 1997 and 1998...........        57,540         87,710
  Additional paid-in capital................................    14,286,297     37,727,345
  Retained earnings (deficit)...............................   (11,426,338)   (14,611,751)
                                                              ------------   ------------
Total stockholders' equity..................................     2,917,499     23,203,304
                                                              ------------   ------------
Total liabilities and stockholders' equity..................  $  6,581,585   $ 27,541,612
                                                              ============   ============
</TABLE>
 
See accompanying notes.
 
                                       F-9
<PAGE>   63
 
                         REALTY INFORMATION GROUP, INC.
 
                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
 
<TABLE>
<CAPTION>
                                     COMMON STOCK       ADDITIONAL      RETAINED         TOTAL
                                  -------------------     PAID-IN       EARNINGS     STOCKHOLDERS'
                                   SHARES     AMOUNT      CAPITAL      (DEFICIT)        EQUITY
                                  ---------   -------   -----------   ------------   -------------
<S>                               <C>         <C>       <C>           <C>            <C>
Balance at December 31, 1995....  4,031,657   $40,317   $ 7,814,987   $ (5,528,563)   $ 2,326,741
  Stock issued for
     acquisition................    347,361     3,473     1,196,527                     1,200,000
  Exercise of stock options for
     note receivable............     30,300       303       (45,974)                      (45,671)
  Shares issued.................  1,235,201    12,352     4,808,454                     4,820,806
  Net loss......................         --        --            --     (2,632,229)    (2,632,229)
                                  ---------   -------   -----------   ------------    -----------
Balance at December 31, 1996....  5,644,519    56,445    13,773,994     (8,160,792)     5,669,647
  Stock issued for
     acquisition................     44,571       446       205,494                       205,940
  Stock issued for
     compensation...............     64,927       649       299,351             --        300,000
  Reduction of note receivable
     from stockholder...........         --        --         7,458             --          7,458
  Net loss......................         --        --            --     (3,265,546)    (3,265,546)
                                  ---------   -------   -----------   ------------    -----------
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
                                  =========   =======   ===========   ============    ===========
</TABLE>
 
See accompanying notes.
 
                                      F-10
<PAGE>   64
 
                         REALTY INFORMATION GROUP, INC.
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                             YEAR ENDED DECEMBER 31,
                                                     ---------------------------------------
                                                        1996          1997          1998
                                                     -----------   -----------   -----------
<S>                                                  <C>           <C>           <C>
Operating activities:
Net loss...........................................  $(2,632,229)  $(3,265,546)  $(3,185,413)
Adjustments to reconcile net loss to net cash
  provided by (used in) in operating activities:
  Depreciation.....................................      212,030       353,333       428,702
  Amortization.....................................      266,986       487,144       705,806
  Provision for losses on accounts receivable......       30,000        61,343       174,720
  Non cash compensation charges....................           --       157,459        68,446
Changes in operating assets and liabilities:
  Accounts receivable..............................     (470,117)     (217,153)     (398,955)
  Prepaid expenses and other current assets........      (22,942)       29,838      (323,405)
  Deposits.........................................      (33,152)       (6,691)      (87,550)
  Accounts payable and accrued expenses............      667,649       230,530     1,579,633
  Deferred revenue.................................      157,410       (66,668)      744,590
                                                     -----------   -----------   -----------
  Net cash used in operating activities............   (1,824,365)   (2,236,411)     (293,426)
Investing activities:
Purchases of property and equipment, net...........     (631,385)     (522,592)   (1,283,666)
Capitalization of product development costs........     (347,065)     (600,670)     (985,262)
Acquisitions, net of acquired cash.................       25,924      (547,859)       (7,033)
                                                     -----------   -----------   -----------
  Net cash used in investing activities............     (952,526)   (1,671,121)   (2,275,961)
Financing activities:
Net proceeds from capital contributions............    4,775,135            --            --
Proceeds from (payment of) line of credit..........           --     1,000,000    (1,000,000)
Proceeds from (payment of) subordinated debt to
  stockholder......................................           --       650,000      (650,000)
Net proceeds from initial public offering..........           --            --    22,737,439
Net proceeds from exercise of stock options........           --            --        80,000
                                                     -----------   -----------   -----------
  Net cash provided by financing activities........    4,775,135     1,650,000    21,167,439
Net increase (decrease) in cash and cash
  equivalents......................................    1,998,244    (2,257,532)   18,598,052
Cash and cash equivalents at beginning of year.....    1,328,123     3,326,367     1,068,835
                                                     -----------   -----------   -----------
Cash and cash equivalents at end of year...........  $ 3,326,367   $ 1,068,835   $19,666,887
                                                     ===========   ===========   ===========
</TABLE>
 
See accompanying notes.
 
                                      F-11
<PAGE>   65
 
                         REALTY INFORMATION GROUP, INC.
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
1. ORGANIZATION
 
     Realty Information 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
 
     Realty Information Group, Inc. ("the Company") 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 is an
operating entity, while RIGINC is a shell holding entity. 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 owns (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 maintains their exact same ownership of the operating
entity, RIGLP, as before the merger. The transfer of assets and liabilities of
RIGLP and RIGINC have 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. a wholly owned subsidiary of the
Company.
 
     Additionally, the consolidated financial statements of the Company include
the accounts of New Market Systems, Inc. ("NMS") acquired on March 1, 1997 (Note
3) and C Data Services, Inc. ("CDS") acquired on August 14, 1998 (Note 3). CDS
was merged into Costar Realty Information, Inc. on January 1, 1999.
 
  Use of Estimates
 
     The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities at the
date of the financial statements and the associated amounts of revenues and
expenses during the reporting period. Actual results could differ from the
estimates.
 
  Revenue Recognition
 
     Revenue from the sale of licenses for information is recognized on a
straight-line basis over the term of the license, which is typically from one to
three years.
 
                                      F-12
<PAGE>   66
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
  Cash and Cash Equivalents
 
     The Company's cash and cash equivalents include highly liquid instruments
purchased with an original maturity of less than three months. The cash is held
in several large financial institutions. At December 31, 1998, cash of $100,000
and $500,000 was held in escrow accounts under the conditions of a certain data
licensing agreement and the LeaseTrend, Inc. acquisition agreement (Note 12),
respectively. Both amounts were paid out of escrow subsequent to December 31,
1998.
 
  Property and Equipment
 
     Property and equipment, including leasehold improvements, are stated at
cost and depreciated using the straight-line method over estimated useful lives
of three to seven years. Leasehold improvements are amortized over the lesser of
the related lease term or the useful life.
 
  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 product 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 $181,000, $287,000
and $476,000 of expense related to the capitalized product development costs for
the years ended December 31, 1996, 1997 and 1998, respectively.
 
  Intangible Assets
 
     The value assigned to the customer base acquired through the purchase of
CDS, NMS and Chicago ReSource, Inc., and goodwill, resulting from the purchase
of Space Datagraphics Systems, Inc., in December 1994, are being amortized on a
straight-line basis over ten years. The Company continuously evaluates and
adjusts, if necessary, the net realizable value of these assets.
 
  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. Upon the effectiveness of the Registration Statement on Form S-1 in
connection with the Company's initial public offering, the partnership became
part of the Company and its taxable income (loss) flowed through to the Company.
Had the Company operated as a C-Corporation for the years ended December 31,
1996, 1997 and 1998, there would be no income taxes recorded as a result of the
losses for the periods. NMS and CDS are corporations, which provide for income
taxes under the provisions of Statement of Financial Accounting Standards No.
109. As of December 31, 1998, the Company, including NMS and CDS had net loss
carryforwards totaling approximately $2,200,000. A valuation allowance has been
established against the related net deferred tax assets in their entirety.
 
                                      F-13
<PAGE>   67
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
  Stock-Based Compensation
 
     In October 1995, the Financial Accounting Standards Board issued Statement
of Financial Accounting Standards ("SFAS") No. 123, "Accounting for Stock-Based
Compensation" which is effective for the Company's financial statements after
1995. SFAS No. 123 allows companies to account for stock-based compensation
under the provisions of either SFAS No. 123 or Accounting Principles Board
("APB") Opinion No. 25, "Accounting for Stock Issued to Employees", with pro
forma disclosure as if the measurement provision of SFAS No. 123 had been
adopted. The Company applies these principles and accounts for its unit-based
compensation in accordance with the provisions of APB No. 25. As such, the
adoption of SFAS No. 123 does not impact the financial position or results of
operations of the Company.
 
  Advertising Costs
 
     Advertising costs are expensed as incurred. Such costs included in selling
and marketing expense totaled approximately $203,700, $398,000, and $904,600 for
the years ended December 31, 1996, 1997, and 1998, respectively.
 
  Concentration of Credit Risk
 
     The Company performs ongoing credit evaluations of its customers' financial
condition and generally does not require collateral. The Company maintains
reserves for credit losses, and such losses have been within management's
expectations. The credit risk in accounts receivable is mitigated by the large
and widespread customer base and lack of dependence on individual customers. The
carrying amount of the accounts receivable approximates their net realizable
value.
 
  Recent Pronouncements
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130 ("SFAS 130"), "Comprehensive Income",
which is required to be adopted for the year ended December 31, 1998. SFAS 130
requires that an enterprise (a) classify items of other comprehensive income by
their nature in the financial statements and (b) display the accumulated balance
of other comprehensive income separately from retained earnings and additional
paid-in capital in the Statements of Stockholders' Equity. For all periods
presented, the Company had no items of comprehensive income and, accordingly,
the Statement has no effect on the Company.
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 131 ("SFAS 131"), "Disclosures about Segments
of an Enterprise and Related Information", which is required to be adopted for
the year ended December 31, 1998. SFAS 131 changes the way public companies
report segment information in annual financial statements and also require those
companies to report selected segment information in interim financial reports to
stockholders. The adoption of SFAS 131 did not have any impact on the Company's
financial statements as the Company has determined that it has only one
reportable segment.
 
     In October 1997, the AICPA issued SOP 97-2, Software Revenue Recognition,
which changes the requirements for revenue recognition effective for
transactions that the Company will enter into beginning January 1, 1998. The
implementation of SOP 97-2 is not expected to have a material effect on the
financial statements of the Company. As of January 1, 1998 the Company adopted
AICPA SOP 97-2, Software Revenue Recognition, which was effective for
transactions that the Company
 
                                      F-14
<PAGE>   68
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
entered into in 1998. Prior years were not restated. The effect of adopting SOP
97-2 was not material in the financial statements of the Company. In March 1998,
AcSEC issued SOP 98-4, which defers for one year the implementation of certain
provision of SOP 97-2. The issuance of SOP 98-4 had no effect on the Company. In
December 1998, the AICPA issued SOP 98-9, which extends the deferral date of
implementation of certain provisions of SOP 97-2 to 2000 for the Company and
amends the method of revenue recognition in some circumstances. The Company does
not anticipate the adoption of this SOP will have a significant effect on its
results of operations or financial position.
 
  Loss Per Share
 
     Loss per share information is presented as if the Company had operated as a
C-Corporation for all periods presented. In February 1997, the Financial
Accounting Standards Board issued Statement No. 128, "Earnings Per Share". All
earnings per share amounts for all periods have been presented to conform to the
Statement 128 requirements.
 
3. ACQUISITIONS
 
     On April 1, 1996, the Company expanded to the Chicago area by purchasing
substantially all of the assets and liabilities of Chicago ReSource, Inc.
("CRI"), through the issuance of 347,361 shares of Common Stock valued at
$1,200,000. On March 1, 1997 the Company expanded to the San Francisco area
through a purchase of 99.3% of the outstanding shares of New Market Systems,
Inc. ("NMS"), a California corporation, through the exchange of 44,571 shares of
Common Stock valued at $206,000 and payment of $550,000 in cash. On August 14,
1998, the Company expanded to the Houston area by purchasing the stock of C Data
Services, Inc. ("CDS") through the exchange of 93,530 shares of unregistered
Common Stock and approximately $9,000 in cash. The accompanying statements of
operations reflect the operating results of CRI, NMS and CDS since the effective
date of the acquisition. Except for cash acquired, these transactions have been
excluded from the statements of cash flows and have been accounted for using
purchase accounting.
 
     The pro forma unaudited results of operations for the years ended December
31, 1997 and 1998, assuming the purchase of NMS and CDS had been consummated as
of January 1 of each year, respectively, are as follows:
 
<TABLE>
<CAPTION>
                                                          1997           1998
                                                       -----------    -----------
<S>                                                    <C>            <C>
Revenues.............................................  $ 7,960,000    $13,972,000
                                                       ===========    ===========
Net loss.............................................  $(3,386,000)   $(3,248,000)
                                                       ===========    ===========
Net loss per share...................................  $     (0.58)   $     (0.45)
                                                       ===========    ===========
</TABLE>
 
                                      F-15
<PAGE>   69
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
4. OTHER ASSETS
 
     Other assets consists of intangible assets as follows:
 
<TABLE>
<CAPTION>
                                                          1997            1998
                                                       ----------      ----------
<S>                                                    <C>             <C>
Acquired contracts...................................  $2,041,289      $2,545,717
Accumulated amortization.............................     301,912         498,406
                                                       ----------      ----------
                                                        1,739,377       2,047,311
                                                       ----------      ----------
Goodwill.............................................      79,979          79,979
Accumulated amortization.............................      23,000          29,634
                                                       ----------      ----------
                                                           56,979          50,345
                                                       ----------      ----------
                                                       $1,796,356      $2,097,656
                                                       ==========      ==========
</TABLE>
 
5. LINE OF CREDIT
 
     In October 1997, the Company entered into a line of credit agreement with
Silicon Valley East (a Division of Silicon Valley Bank), and renewed the line in
October 1998. The new line provides for a total of $5,000,000 in borrowing
bearing an interest rate at the bank's prime rate plus 1%, and has a one-year
term. Borrowings of up to 50% of the cash portion of acquisitions may be
converted to long term borrowings with terms of 30 months. The assets of the
Company and its subsidiaries secure borrowings under the line. The Company is in
compliance at December 31, 1998, with the terms of the line of credit agreement,
which includes covenants requiring minimum working capital and equity amounts.
At December 31, 1998, no borrowings were outstanding under the line. Interest
paid in 1997 and 1998 totaled $17,760 and $63,263, respectively.
 
6. 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 a rate equal to that of the line of credit. In connection with the
commitment, the individual contributing partner has received warrants for the
purchase of 45,450 shares of Common Stock. The warrants have a two-year term
beyond the Company's initial public offering and provide 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. At December 31, 1998, no borrowings were
outstanding under the commitment. Interest paid in 1997 and 1998 totaled $8,055
and $28,235, respectively.
 
     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 1996, 1997 and 1998, the Company incurred fees of approximately $200,000,
$200,000 and $82,912, respectively, related to such consulting services. These
agreements were terminated in connection with the Company's initial public
offering.
 
7. 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 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
 
                                      F-16
<PAGE>   70
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
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 1997 or 1998.
 
<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                                      1998
                                                                  ------------
    <S>                                                           <C>
    Deferred tax assets:
         Reserve for bad debts..................................   $  125,000
         Accrued compensation...................................      414,000
         Net operating losses...................................      927,000
         Other liabilities......................................       51,000
                                                                   ----------
              Total deferred tax assets.........................    1,517,000
                                                                   ----------
    Deferred tax liabilities:
         Depreciation...........................................     (299,000)
         Product development costs..............................     (260,000)
                                                                   ----------
              Total deferred tax liabilities....................     (559,000)
                                                                   ----------
         Net deferred tax asset.................................      958,000
         Valuation allowance....................................     (958,000)
                                                                   ----------
    Net deferred tax assets.....................................   $       --
                                                                   ==========
</TABLE>
 
     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,
                                                                      1998
                                                                  ------------
    <S>                                                           <C>
    Expected federal income tax provision (benefit) at 34%......  $ (1,083,000)
    State income taxes, net of federal benefit..................      (147,000)
    Change in valuation allowance...............................       958,000
    Expenses not deductible for tax purposes....................       277,000
    Other.......................................................        (5,000)
                                                                  ------------
                                                                  $         --
                                                                  ============
</TABLE>
 
8. COMMITMENTS
 
     The Company leases office space and equipment under operating lease
agreements that expire at various dates through the year 2003. Lease agreements
provide for various renewal terms and reimbursement of taxes, maintenance,
insurance and other occupancy expenses applicable to the leased premises or
property.
 
                                      F-17
<PAGE>   71
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     At December 31, 1998, future minimum lease payments under operating leases
are as follows:
 
<TABLE>
<S>                                                           <C>
1999........................................................  $  830,302
2000........................................................     546,964
2001........................................................     180,906
2002........................................................     124,541
2003 and thereafter.........................................      52,285
                                                              ----------
                                                              $1,734,998
                                                              ==========
</TABLE>
 
     Rent expense was approximately $525,000, $766,000 and $1,031,000 for the
years ended December 31, 1996, 1997 and 1998, respectively.
 
9. SALES OF COMMON STOCK
 
     On December 3, 1996, the Company completed a private placement (the
"Private Placement") in which the Company raised approximately $5.0 million
through the sale of 1,235,000 shares of Common Stock. The proceeds of the
transaction were used to fund Company's working capital needs and the NMS
acquisitions.
 
     In May 1997, the Company issued 65,000 shares of common stock valued at
$300,000 to provide compensation to an officer, $150,000 of which had been
accrued at December 31, 1996.
 
     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 "Offering"). Total
proceeds of the Offering 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 subordinated debt to stockholder, for a total
$1,650,000, out of the proceeds of the Offering.
 
10. NET LOSS PER SHARE
 
     The following tables sets forth the computation of basic and diluted net
loss per share:
 
<TABLE>
<CAPTION>
                                                         YEARS ENDED DECEMBER 31,
                                                 -----------------------------------------
                                                    1996           1997           1998
                                                 -----------    -----------    -----------
    <S>                                          <C>            <C>            <C>
    Numerator:
         Net loss..............................  $(2,632,229)   $(3,265,546)   $(3,185,413)
                                                 ===========    ===========    ===========
    Denominator:
         Denominator for basic earnings per
           share -- weighted-average shares....    4,387,590      5,722,432      7,213,037
    Effect of dilutive securities:
         Dilutive potential common shares......           --             --             --
                                                 -----------    -----------    -----------
         Denominator for diluted earnings per
           share -- adjusted weighted-average
           shares..............................    4,387,590      5,722,432      7,213,037
                                                 ===========    ===========    ===========
         Basic and diluted net loss per
           share...............................  $     (0.60)   $     (0.57)   $     (0.44)
                                                 ===========    ===========    ===========
</TABLE>
 
                                      F-18
<PAGE>   72
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The weighted average number of shares does not include stock options and
warrants outstanding of 343,844, 398,384 and 922,944 as of December 1996, 1997
and 1998, respectively, as their effect would be anti-dilutive for the periods
presented.
 
11. EMPLOYEE BENEFIT PLANS
 
  Option Plan
 
     In March 1996 the Company 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. The Board of Directors of the Company administers the option
plan. Options are granted at prices, which the Board of believes approximate the
fair market value of its shares of Common Stock. Individual grants become
exercisable over a period of three years from the date of grant. The contractual
term of the options range from three to ten years from the date of grant.
 
     In June 1998 the Company's Board of Directors adopted the Stock Option Plan
(the "1998 Plan") prior to consummation of the Offering. The 1998 Plan provides
for the grant of stock options to officers and employees of the Company or 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 1,450,000 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.
 
                                      F-19
<PAGE>   73
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     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, 1995...............      246,884                               $2.87
  Granted......................................      127,260                $3.45          $3.45
  Exercised....................................      (30,300)               $1.65          $1.65
  Canceled or expired..........................           --
                                                     -------
Outstanding at December 31, 1996...............      343,844                               $3.19
  Granted......................................       69,690         $4.07-$ 4.62          $4.38
  Exercised....................................           --
  Canceled or expired..........................      (15,150)               $3.45          $3.45
                                                     -------
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
                                                     =======
Exercisable at December 31, 1998...............      425,944
                                                     =======
Exercisable at December 31, 1997...............      249,299
                                                     =======
Exercisable at December 31, 1996...............      174,952
                                                     =======
</TABLE>
 
     During 1996 the Company adopted 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
$2,690,009, $3,337,420 and $3,912,472, and $0.61, $0.58 and $0.54 as of December
31, 1996, 1997 and 1998, respectively. Such pro forma results are not
representative of the effects on operations for future years.
 
     The fair value of the options granted during 1996 are estimated on the date
of grant using the minimum value option-pricing model with the following
assumptions: dividend yield 0%, risk-free interest rate of 6.00%, and expected
life of four years. The fair value of the options granted during 1997 are
estimated on the date of grant using the minimum value option-pricing model with
the following assumptions: dividend yield 0%, risk-free interest rate of 6.00%,
expected life of five years. The fair value of the options granted during 1998
are estimated on the date of grant using the Black-Scholes option-pricing model
with the following assumptions: expected volatility of 94%; dividend yield 0%,
risk-free interest rate of 5.7%, and expected life of five years.
 
                                      F-20
<PAGE>   74
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The following table summarizes information regarding options outstanding at
December 31, 1998:
 
<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 - $ 4.62............    349,904        4.9              $ 3.61        303,444        $3.52
$ 5.63 - $ 7.44............     16,000        9.7                6.46             --           --
$ 8.13 - $ 9.00............    508,090        9.6                8.91        122,500         8.92
$10.06 - $13.75............      3,500        9.8               12.17             --           --
                             ---------                                      --------
                               877,494        7.7              $ 6.77        425,944        $5.07
                             =========                                      ========
</TABLE>
 
  Employee 401(k) Plan
 
     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 l% and 15% of employees'
salaries, limited to a maximum annual amount as established by the Internal
Revenue Service. The Company matches 25% (50% after January 1, 1999) 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 were $27,808 and
$39,354 in 1997 and 1998, respectively.
 
12. SUBSEQUENT EVENTS
 
     On January 8, 1999, the Company acquired all of the common 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 purchase has been accounted for using purchase accounting and has
been valued at $9,200,000 for accounting purposes. The purchase price was
allocated primarily to capitalized product development costs and intangibles and
is being amortized over 2 - 10 years.
 
     On January 22, 1999, the Company acquired all of the common stock of
Jamison Research, Inc., an Atlanta based provider of commercial real estate
information, for $5,284,000 in cash and 448,031 shares of the Company's Common
Stock. The purchase has been accounted for using purchase accounting and has
been valued at $10,300,000 for accounting purposes. The purchase price was
allocated primarily to capitalized product development costs and intangibles and
is being amortized over 2 - 10 years. Such purchase price is subject to
adjustment based on the final audit of the net worth.
 
     The pro forma unaudited results of operations for the year ended December
31, 1998 assuming the purchase of LeaseTrend and Jamison had been consummated as
of January 1, 1998 and as
 
                                      F-21
<PAGE>   75
                         REALTY INFORMATION GROUP, INC.
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
adjusted for the amortization of intangibles and the elimination of interest
charges, would be as follows:
 
<TABLE>
<CAPTION>
                                                1998
                                             -----------
<S>                                          <C>
Revenues...................................  $21,923,061
                                             ===========
Net loss...................................  $(6,656,174)
                                             ===========
Net loss per share.........................  $     (0.76)
                                             ===========
</TABLE>
 
                                      F-22
<PAGE>   76
 
                         REPORT OF INDEPENDENT AUDITORS
 
Board of Directors
Realty Information Group, Inc.
 
We have audited the accompanying balance sheets of LeaseTrend, Inc. as of
December 31, 1997 and 1998, and the related statements of operations,
stockholders' deficit and cash flows for the years then ended. 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 generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the financial statements referred to above present fairly, in
all material respects, the financial position of LeaseTrend, Inc., at December
31, 1997 and 1998, and the results of its operations and its cash flows for the
years then ended, in conformity with generally accepted accounting principles.
 
                                          /s/ ERNST & YOUNG LLP
 
Washington, DC
February 5, 1999
 
                                      F-23
<PAGE>   77
 
                                LEASETREND, INC.
 
                            STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                              YEAR ENDED DECEMBER 31,
                                                              ------------------------
                                                                 1997          1998
                                                              ----------    ----------
<S>                                                           <C>           <C>
Revenues....................................................  $2,548,576    $3,444,969
Cost of revenues............................................     908,258     1,310,994
                                                              ----------    ----------
Gross margin................................................   1,640,318     2,133,975
Selling, general and administrative expenses................   1,749,372     2,432,767
                                                              ----------    ----------
Loss from operations........................................    (109,054)     (298,792)
Other income (expense):
  Interest expense..........................................    (369,794)     (435,385)
  Other income..............................................       1,303         1,696
                                                              ----------    ----------
Net loss....................................................  $ (477,545)   $ (732,481)
                                                              ==========    ==========
Net loss per share -- basic and diluted.....................  $  (562.68)   $  (863.06)
                                                              ==========    ==========
Weighted average common shares..............................       848.7         848.7
                                                              ==========    ==========
</TABLE>
 
See accompanying notes.
 
                                      F-24
<PAGE>   78
 
                                LEASETREND, INC.
 
                                 BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                     DECEMBER 31,
                                                              --------------------------
                                                                 1997           1998
                                                              -----------    -----------
<S>                                                           <C>            <C>
ASSETS
Current assets:
Cash........................................................  $        --    $    18,266
Accounts receivable, less allowance for doubtful accounts of
  $23,100 and $16,900 as of December 31, 1997 and 1998,
  respectively..............................................       20,914         12,316
Prepaid expenses and other current assets...................        7,681          6,786
                                                              -----------    -----------
  Total current assets......................................       28,595         37,368
Property and equipment:
  Furniture and equipment...................................      121,046        152,499
  Computer hardware and software............................      175,500        234,369
                                                              -----------    -----------
                                                                  296,546        386,868
Accumulated depreciation....................................     (172,826)      (243,901)
                                                              -----------    -----------
                                                                  123,720        142,967
Capitalized product development cost, net of accumulated
  amortization of $141,230 and $207,960 as of December 31,
  1997 and 1998, respectively...............................      177,137        157,867
Goodwill, net of accumulated amortization of $26,730 and
  $42,768 as of December 31, 1997 and 1998, respectively....      133,653        117,615
Deposits and other assets...................................        1,680          2,805
                                                              -----------    -----------
  Total assets..............................................  $   464,785    $   458,622
                                                              ===========    ===========
LIABILITIES AND STOCKHOLDERS' DEFICIT
Current liabilities:
Bank overdraft..............................................  $     4,786    $        --
Accounts payable and accrued expenses.......................      259,028        291,958
Deferred revenue............................................      297,635        560,463
Accrued consulting fees -- related parties..................      215,007        295,011
Accrued interest -- related parties.........................      616,241        934,850
Notes payable, in default -- related parties................    1,336,766      1,428,521
Note payable................................................      121,423         66,401
                                                              -----------    -----------
  Total current liabilities.................................    2,850,886      3,577,204
Stockholders' deficit:
Common stock, no par value; 1,500 shares authorized; 848.7
  issued and outstanding as of December 31, 1997 and 1998...           --             --
Paid-in capital.............................................      581,862        581,862
Accumulated deficit.........................................   (2,967,963)    (3,700,444)
                                                              -----------    -----------
  Total stockholders' deficit...............................   (2,386,101)    (3,118,582)
                                                              -----------    -----------
  Total liabilities and stockholders' deficit...............  $   464,785    $   458,622
                                                              ===========    ===========
</TABLE>
 
See accompanying notes.
 
                                      F-25
<PAGE>   79
 
                                LEASETREND, INC.
 
                      STATEMENTS OF STOCKHOLDERS' DEFICIT
 
<TABLE>
<CAPTION>
                                         COMMON                                   TOTAL
                                         STOCK     PAID-IN     ACCUMULATED    STOCKHOLDERS'
                                         SHARES    CAPITAL       DEFICIT         DEFICIT
                                         ------    --------    -----------    -------------
<S>                                      <C>       <C>         <C>            <C>
Balance at December 31, 1996...........   848.7    $581,862    $(2,490,418)    $(1,908,556)
Net loss...............................      --          --       (477,545)       (477,545)
                                         ------    --------    -----------     -----------
Balance at December 31, 1997...........   848.7     581,862     (2,967,963)     (2,386,101)
Net loss...............................      --          --       (732,481)       (732,481)
                                         ------    --------    -----------     -----------
Balance at December 31, 1998...........   848.7    $581,862    $(3,700,444)    $(3,118,582)
                                         ======    ========    ===========     ===========
</TABLE>
 
See accompanying notes.
 
                                      F-26
<PAGE>   80
 
                                LEASETREND, INC.
 
                            STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                              YEAR ENDED DECEMBER 31,
                                                              ------------------------
                                                                 1997          1998
                                                              ----------    ----------
<S>                                                           <C>           <C>
Operating activities:
Net loss....................................................  $(477,545)    $(732,481)
Adjustments to reconcile net loss to net cash provided by
  operating activities:
  Depreciation..............................................     60,940        71,075
  Amortization..............................................     73,331        82,767
  Provision for losses on accounts receivable...............     16,084        (6,224)
  Amortization of debt discount.............................     91,756        91,756
Changes in operating assets and liabilities:
  Accounts receivable.......................................    (11,640)       14,822
  Prepaid expenses and other current assets.................      1,629           895
  Other assets..............................................       (121)       (1,125)
  Bank overdraft............................................      4,786        (4,786)
  Accounts payable and accrued expenses.....................     50,138        32,931
  Accrued consulting fees -- related parties................     80,004        80,004
  Accrued interest -- related parties.......................    257,163       318,609
  Deferred revenue..........................................     (4,635)      262,828
                                                              ---------     ---------
     Net cash provided by operating activities..............    141,890       211,071
Investing activities:
Purchase of property and equipment..........................    (78,387)      (90,323)
Capitalized product development cost........................    (55,090)      (47,460)
                                                              ---------     ---------
     Net cash used in investing activities..................   (133,477)     (137,783)
Financing activities:
Payments on note payable....................................    (13,037)      (55,022)
                                                              ---------     ---------
     Net cash used in financing activities..................    (13,037)      (55,022)
                                                              ---------     ---------
Net increase (decrease) in cash.............................     (4,624)       18,266
Cash at beginning of year...................................      4,624            --
                                                              ---------     ---------
Cash at end of year.........................................  $      --     $  18,266
                                                              =========     =========
</TABLE>
 
See accompanying notes.
 
                                      F-27
<PAGE>   81
 
                                LEASETREND, INC.
 
                         NOTES TO FINANCIAL STATEMENTS
 
1. ORGANIZATION
 
     LEASETREND, INC. (the "Company"), incorporated in the state of Ohio on
August 17, 1988, develops and maintains a proprietary database of comprehensive
office, industrial and retail real estate information in eighteen metropolitan
areas primarily in the Midwestern United States and Florida. In addition, the
Company has developed multimedia software products that allow clients to access
the database. The database and software products are distributed to its clients
under license agreements which are typically one year in duration.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
USE OF ESTIMATES
 
     The preparation of the financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities at the
date of the financial statements and the associated amounts of revenues and
expenses during the reporting period. Actual results could differ from those
estimates.
 
REVENUE RECOGNITION
 
     The Company recognizes revenue from the sale of licenses to the proprietary
software and database on a straight-line basis over the term of the license
agreement which is typically one year or less.
 
PROPERTY AND EQUIPMENT
 
     Property and equipment, including leasehold improvements, are stated at
cost and depreciated using the straight-line method over estimated useful lives
of three to seven years. Leasehold improvements are amortized over the lesser of
the related lease term or the useful life.
 
CAPITALIZED PRODUCT DEVELOPMENT COSTS
 
     Initial costs to develop and produce proprietary software and database
products, including direct labor, contractors, and applicable overhead are
capitalized from the time technological feasibility is determined until product
release. Prior to technological feasibility, such costs are expensed as
incurred. 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 future gross revenues for a product, or (b) the
straight-line method over the remaining estimated economic life of the product,
typically five years, after product release.
 
GOODWILL
 
     The excess of the $150,000 purchase price over the fair value of net assets
acquired resulting from a purchase in 1996 is being amortized on a straight-line
basis over ten years. The Company continuously evaluates and adjusts, if
necessary, the net realizable value of these assets. (See Note 4).
 
CONCENTRATION OF CREDIT RISK
 
     The Company performs ongoing credit evaluations of its customers' financial
condition and generally does not require collateral. The Company maintains
reserves for credit losses, and such
 
                                      F-28
<PAGE>   82
                                LEASETREND, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
losses have been within management's expectations. The credit risk in accounts
receivable is mitigated by the large customer base and lack of dependence on
individual customers. The carrying amount of the accounts receivable
approximates their fair value.
 
INCOME TAXES
 
     The Company is an S corporation for federal income tax purposes under which
income, losses, deductions and credits are allocated to and reported by the
shareholders on their individual income tax returns. Accordingly, no provision
for income tax has been recorded in the financial statements.
 
LOSS PER SHARE
 
     In February 1997, the Financial Accounting Standards Board issued Statement
No. 128, "Earnings Per Share." All earnings per share amounts for all periods
have been presented to conform to the Statement 128 requirements. The effect of
the options outstanding are not included as their effect would be anti-dilutive
for all the periods presented.
 
ADVERTISING COSTS
 
     Advertising costs are expensed as incurred. Such costs included in selling
and marketing expense totaled approximately $21,200 and $48,900 for the years
ended December 31, 1997 and 1998, respectively.
 
RECENT PRONOUNCEMENTS
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130 ("SFAS 130"), "Comprehensive Income",
which is required to be adopted for the year ended December 31, 1998. SFAS 130
requires that an enterprise (a) classify items of other comprehensive income by
their nature in the financial statements and (b) display the accumulated balance
of other comprehensive income separately from retained earnings and additional
paid-in capital in the Statements of Stockholders' Deficit. For all periods
presented, the Company had no items of comprehensive income and, accordingly,
the Statement has no effect on the Company.
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 131 ("SFAS 131"), "Disclosures about Segments
of an Enterprise and Related Information", which is required to be adopted for
the year ended December 31, 1998. SFAS 131 changes the way public companies
report segment information in annual financial statements and also require those
companies to report selected segment information in interim financial reports to
stockholders. The adoption of SFAS 131 did not have any impact on the Company's
financial statements as the Company has determined that it has only one
reportable segment.
 
     In October 1997, the AICPA issued SOP 97-2, Software Revenue Recognition,
which changes the requirements for revenue recognition effective for
transactions that the Company will enter into beginning January 1, 1998. The
implementation of SOP 97-2 is not expected to have a material effect on the
financial statements of the Company. As of January 1, 1998 the Company adopted
AICPA SOP 97-2, Software Revenue Recognition, which was effective for
transactions that the Company entered into in 1998. Prior years were not
restated. The effect of adopting SOP 97-2 was not material in the financial
statements of the Company. In March 1998, AcSEC issued SOP 98-4, which defers
 
                                      F-29
<PAGE>   83
                                LEASETREND, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
for one year the implementation of certain provision of SOP 97-2. The issuance
of SOP 98-4 had no effect on the Company. In December 1998, the AICPA issued SOP
98-9, which extends the deferral date of implementation of certain provisions of
SOP 97-2 to 2000 for the Company and amends the method of revenue recognition in
some circumstances. The Company does not anticipate the adoption of this SOP
will have a significant effect on its results of operations or financial
position.
 
3. COMMITMENTS
 
     The Company leases office space in various locations under non-cancelable
operating lease agreements. The leases generally provide for renewal terms and
the Company is required to pay a portion of common area expenses including
maintenance, real estate taxes and other expenses. Rent expense for the years
ended December 31, 1997 and 1998 was $94,716 and $109,914, respectively. As of
December 31, 1998, payments due under non-cancelable operating leases are as
follows:
 
<TABLE>
<S>                                                           <C>
1999........................................................  $ 98,400
2000........................................................    98,400
2001........................................................    98,400
2002........................................................    98,400
2003 and thereafter.........................................    20,500
                                                              --------
                                                              $414,100
                                                              ========
</TABLE>
 
4. RELATED PARTY TRANSACTIONS
 
     At December 31, 1997 and 1998, the Company had notes payable to a venture
capital fund (the "Venture Fund") of $1,094,765 and $1,186,521, respectively.
The notes bear interest at 15.15% per annum, 17.15% per annum in the event of
default as defined in the notes. The notes were in default during 1998 and
accrued interest at 17.15%. The notes called for payments of principal and
interest beginning in 1997 through December 1999. During 1997 and 1998, no such
payments of principal or interest were made. As part of this transaction, the
Company entered into a consulting agreement with an affiliate of the Venture
Fund that called for the Company to pay a quarterly fee for consulting services
which has been accrued since the beginning of the agreement. All notes and
accrued consulting fees were paid January 8, 1999. (Note 5)
 
     At the time of the Venture Fund financing, the stockholders of the Company
personally entered into an option agreement with the Venture Fund whereby they
agreed to grant an option to the Venture Fund to purchase an aggregate of 300.27
shares of their personal shares in the Company at $1.00 per share, for total of
$290,000 paid to the stockholders. Seventy-two thousand dollars of this amount
was then loaned by the shareholders back to the Company. The Company recorded a
discount to the debt financing of approximately $459,000 (representing the fair
value allocated to the options) to be amortized as interest expense over the
term of the debt, with a corresponding entry to additional paid-in capital.
 
     The Company had notes payable to stockholders totaling $242,000 as of
December 31, 1997 and 1998. The notes are subordinated in right of payment to
the Venture Fund notes and bear interest at prime plus 1.5%, or 9.25% at
December 31, 1998.
 
     The Company had a note payable to a former partner in a joint venture that
started the Company's Florida operations. The note arose from the purchase by
the Company of the partner's
 
                                      F-30
<PAGE>   84
                                LEASETREND, INC.
 
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
50% interest in the venture. The note bears interest at 8%. As of December 31,
1997 and 1998, the unpaid principal balance on this note was $121,423 and
$66,401, respectively.
 
5. SUBSEQUENT EVENTS
 
     On January 8, 1999, the Company was acquired by Realty Information Group,
Inc. in exchange for $4.5 million in cash and 566,671 shares of Realty
Information Group, Inc. common stock. All notes payable and related interest of
the Company were repaid from the proceeds on January 8, 1999.
 
                                      F-31
<PAGE>   85
 
                         REPORT OF INDEPENDENT AUDITORS
 
Board of Directors
Realty Information Group, Inc.
 
We have audited the accompanying balance sheets of Jamison Research, Inc. as of
December 31, 1997 and 1998, and the related statements of operations,
stockholders' deficit and cash flows for the years then ended. 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 generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the financial statements referred to above present fairly, in
all material respects, the financial position of Jamison Research, Inc., at
December 31, 1997 and 1998, and the results of its operations and its cash flows
for the years then ended, in conformity with generally accepted accounting
principles.
 
                                          /s/ ERNST & YOUNG LLP
 
Washington, D.C.
February 5, 1999
 
                                      F-32
<PAGE>   86
 
                             JAMISON RESEARCH, INC.
                            STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                              YEAR ENDED DECEMBER 31,
                                                              ------------------------
                                                                 1997          1998
                                                              ----------    ----------
<S>                                                           <C>           <C>
Revenues....................................................  $3,664,198    $4,577,927
Cost of revenues............................................   1,378,946     1,658,072
                                                              ----------    ----------
Gross margin................................................   2,285,252     2,919,855
Operating expenses:
Compensation to shareholders................................     570,476     1,190,384
Selling, general and administrative.........................   1,681,687     1,887,110
                                                              ----------    ----------
                                                               2,252,163     3,077,494
                                                              ----------    ----------
Income (loss) from operations...............................      33,089      (157,639)
Other income (expense):
Interest income.............................................       1,755            --
Other income................................................       5,883         3,974
Interest expenses...........................................     (23,758)      (13,237)
Other expense...............................................     (18,670)           --
                                                              ----------    ----------
Loss before income taxes....................................      (1,701)     (166,902)
Benefit (provision) for income taxes........................      (3,700)       47,700
                                                              ----------    ----------
  Net loss..................................................  $   (5,401)   $ (119,202)
                                                              ==========    ==========
Net loss per share -- basic and diluted.....................  $    (0.60)   $   (13.24)
                                                              ==========    ==========
Weighted average common shares..............................       9,000         9,000
                                                              ==========    ==========
</TABLE>
 
                                      F-33
<PAGE>   87
 
                             JAMISON RESEARCH, INC.
                                 BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                              ---------------------
                                                                1997        1998
                                                              --------    ---------
<S>                                                           <C>         <C>
ASSETS
Current assets:
Cash........................................................  $118,550    $  50,548
Accounts receivable, less allowance for doubtful accounts of
  $9,700 and $4,000 as of December 31, 1997 and 1998,
  respectively..............................................    84,730       32,426
Refundable income taxes.....................................     5,600        2,800
Prepaid expenses and other current assets...................    19,205          100
Deferred tax asset..........................................   126,500      171,000
                                                              --------    ---------
  Total current assets......................................   354,585      256,874
Property and equipment:
Furniture and equipment.....................................   239,889      271,881
Computer hardware and software..............................   265,494      302,063
                                                              --------    ---------
                                                               505,383      573,944
Accumulated depreciation....................................  (280,949)    (372,327)
                                                              --------    ---------
                                                               224,434      201,617
Capitalized product development cost, net of accumulated
  amortization of $61,580 and $91,846 as of December 31,
  1997 and 1998, respectively...............................    89,750       59,484
Deposits....................................................       474          474
                                                              --------    ---------
  Total assets..............................................  $669,243    $ 518,449
                                                              ========    =========
 
                       LIABILITIES AND STOCKHOLDERS' DEFICIT
Current liabilities:
Accounts payable and accrued expenses.......................  $217,133    $ 130,319
Accrued income taxes payable................................     3,200           --
Deferred revenue............................................   320,385      404,741
Advances from stockholders..................................   110,672           --
Bank line of credit.........................................        --      114,912
Current portion of long-term debt...........................    29,442       26,114
                                                              --------    ---------
  Total current liabilities.................................   680,832      676,086
Long-term debt, net of current portion......................    37,449       10,603
Stockholders' deficit:
Common stock, $0.10 par value; 500,000 shares authorized;
  9,000 issued and outstanding as of December 31, 1997 and
  1998......................................................       900          900
Retained deficit............................................   (49,938)    (169,140)
                                                              --------    ---------
  Total stockholders' deficit...............................   (49,038)    (168,240)
                                                              --------    ---------
  Total liabilities and stockholders' deficit...............  $669,243    $ 518,449
                                                              ========    =========
</TABLE>
 
See accompanying notes.
 
                                      F-34
<PAGE>   88
 
                             JAMISON RESEARCH, INC.
                      STATEMENTS OF STOCKHOLDERS' DEFICIT
 
<TABLE>
<CAPTION>
                                                   COMMON STOCK                       TOTAL
                                                 ----------------    RETAINED     STOCKHOLDERS'
                                                 SHARES    AMOUNT     DEFICIT        DEFICIT
                                                 ------    ------    ---------    -------------
<S>                                              <C>       <C>       <C>          <C>
Balance at December 31, 1996...................  9,000      $900     $ (44,537)     $ (43,637)
  Net loss.....................................     --        --        (5,401)        (5,401)
                                                 -----      ----     ---------      ---------
Balance at December 31, 1997...................  9,000       900       (49,938)       (49,038)
  Net loss.....................................     --        --      (119,202)      (119,202)
                                                 -----      ----     ---------      ---------
Balance at December 31, 1998...................  9,000      $900     $(169,140)     $(168,240)
                                                 =====      ====     =========      =========
</TABLE>
 
See accompanying notes.
 
                                      F-35
<PAGE>   89
 
                             JAMISON RESEARCH, INC.
                            STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                              YEAR ENDED DECEMBER 31,
                                                              ------------------------
                                                                 1997          1998
                                                              ----------    ----------
<S>                                                           <C>           <C>
Operating Activities:
Net loss....................................................  $  (5,401)    $(119,202)
Adjustments to reconcile net loss to net cash provided by
  operating activities:
  Depreciation..............................................    113,681        93,991
  Amortization..............................................     30,266        30,266
  Gain on sale of asset.....................................         --        (2,709)
  Provision for losses on accounts receivable...............      9,686            --
  Deferred income taxes.....................................        500       (44,500)
  Non-cash compensation to stockholders.....................     27,036            --
Changes in operating assets and liabilities:
  Accounts receivable.......................................    (10,237)       52,304
  Prepaid expenses and other current assets.................    (19,205)       19,105
  Refundable income taxes...................................      3,200          (400)
  Accounts payable and accrued expenses.....................     72,274       (86,815)
  Deferred revenue..........................................     44,518        84,356
                                                              ---------     ---------
     Net cash provided by operating activities..............    266,318        26,396
 
Investing Activities:
Purchase of property and equipment..........................    (76,772)      (71,919)
Proceeds from disposal of property..........................         --         3,455
                                                              ---------     ---------
     Net cash used in investing activities..................    (76,772)      (68,464)
 
Financing Activities:
Re-payments of advances from stockholders...................    (69,418)     (110,672)
Proceeds from bank line of credit...........................         --       114,912
Re-payments of long-term debt...............................    (64,864)      (30,174)
                                                              ---------     ---------
     Net cash used in financing activities..................   (134,282)      (25,934)
                                                              ---------     ---------
Net increase (decrease) in cash and cash equivalents........     55,264       (68,002)
Cash at beginning of year...................................     63,286       118,550
                                                              ---------     ---------
Cash at end of year.........................................  $ 118,550     $  50,548
                                                              =========     =========
</TABLE>
 
See accompanying notes.
 
                                      F-36
<PAGE>   90
 
                             JAMISON RESEARCH, INC.
                         NOTES TO FINANCIAL STATEMENTS
 
1. ORGANIZATION
 
     Jamison Research, Inc. (the "Company") was incorporated in the state of
Georgia on January 19, 1984. The Company develops and maintains a proprietary
database of commercial real estate information in the Atlanta and Dallas
metropolitan areas using proprietary software that permits access to its
database in the form of a multiple listing directory with sorting and reporting
capabilities. The database and software are distributed to its clients
principally under annual license agreements. The Company also provides various
market specific reports using its database of information which are sold on an
individual and subscription basis.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
  Use of Estimates
 
     The preparation of the financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities at the
date of the financial statements and the associated amounts of revenues and
expenses during the reporting period. Actual results could differ from those
estimates.
 
  Revenue Recognition
 
     The Company recognizes revenue from the sale of licenses to the database on
a straight line basis over the term of the license agreement which is typically
one year or less. Revenue from market specific reports are recognized when
delivered to the customer.
 
  Property and Equipment
 
     Property and equipment, including leasehold improvements, are stated at
cost and depreciated using the straight-line method over estimated useful lives
of three to seven years. Leasehold improvements are amortized over the lesser of
the related lease term or the useful life.
 
  Capitalized Product Development Costs
 
     Initial costs to develop and produce proprietary software and database
products, including direct labor, contractors, and applicable overhead are
capitalized from the time technological feasibility is determined until product
release. Prior to technological feasibility, such costs are classified as
software development and expensed as incurred. Amortization of capitalized costs
is based on the greater of (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
product release.
 
  Concentration of Credit Risk
 
     The Company performs ongoing credit evaluations of its customers' financial
condition and generally does not require collateral. The Company maintains
reserves for credit losses, and such losses have been within management's
expectations. The credit risk in accounts receivable is mitigated by the large
customer base and lack of dependence on individual customers. The carrying
amount of the accounts receivable approximates their fair value.
 
                                      F-37
<PAGE>   91
                             JAMISON RESEARCH, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
  Income Taxes
 
     The company provides for income taxes under the provisions of Statement of
Financial Accounting Standards No. 109, "Accounting for Income Taxes," which
requires recognition of deferred tax assets and liabilities for expected future
tax consequences of events that have been included in the financial statements
or income tax returns. Under this method, deferred tax assets and liabilities
are determined based upon the difference between the financial statement and tax
bases of assets and liabilities using enacted tax rates in effect for the year
in which the differences are expected to reverse. The company recognizes revenue
and expenses on a cash basis purpose for tax purposes while using the accrual
method for book purposes.
 
  Loss Per Share
 
     In February 1997, the Financial Accounting Standards Board issued Statement
No. 128, "Earnings Per Share." Jamison has no dilutive options, warrants or
convertible securities. All earnings per share amounts for all periods have been
presented to conform to the Statement 128 requirements.
 
  Recent Pronouncements
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 130 ("SFAS 130"), "Comprehensive Income",
which is required to be adopted for the year ended December 31, 1998. SFAS 130
requires that an enterprise (a) classify items of other comprehensive income by
their nature in the financial statements and (b) display the accumulated balance
of other comprehensive income separately from retained earnings and additional
paid-in capital in the Statements of Stockholders' Deficit. For all periods
presented, the Company had no items of comprehensive income and, accordingly,
the Statement has no effect on the Company.
 
     In June 1997, the Financial Accounting Standards Board issued Statement of
Financial Accounting Standards No. 131 ("SFAS 131"), "Disclosures about Segments
of an Enterprise and Related Information", which is required to be adopted for
the year ended December 31, 1998. SFAS 131 changes the way public companies
report segment information in annual financial statements and also require those
companies to report selected segment information in interim financial reports to
stockholders. The adoption of SFAS 131 did not have any impact on the Company's
financial statements as the Company has determined that it has only one
reportable segment.
 
     In October 1997, the AICPA issued SOP 97-2, Software Revenue Recognition,
which changes the requirements for revenue recognition effective for
transactions that the Company will enter into beginning January 1, 1998. The
implementation of SOP 97-2 is not expected to have a material effect on the
financial statements of the Company. As of January 1, 1998 the Company adopted
AICPA SOP 97-2, Software Revenue Recognition, which was effective for
transactions that the Company entered into in 1998. Prior years were not
restated. The effect of adopting SOP 97-2 was not material in the financial
statements of the Company. In March 1998, AcSEC issued SOP 98-4, which defers
for one year the implementation of certain provision of SOP 97-2. The issuance
of SOP 98-4 had no effect on the Company. In December 1998, the AICPA issued SOP
98-9, which extends the deferral date of implementation of certain provisions of
SOP 97-2 to 2000 for the Company and amends the method of revenue recognition in
some circumstances. The Company does not anticipate the adoption of this SOP
will have a significant effect on its results of operations or financial
position.
 
                                      F-38
<PAGE>   92
                             JAMISON RESEARCH, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
3. COMMITMENTS
 
  Operating Leases
 
     The Company leases equipment and office space in Atlanta, Georgia and
Dallas, Texas under non-cancelable operating lease agreements. The leases
generally provide for renewal terms and the Company is required to pay a portion
of common area expenses including maintenance, real estate taxes and other
expense. Rent expense for the years ended December 31, 1997 and 1998 was
$128,529 and $235,014, respectively. As of December 31, 1998, payments due under
non-cancelable operating leases are as follows:
 
<TABLE>
<S>                                                             <C>
1999........................................................    $235,809
2000........................................................     166,981
2001........................................................     142,416
2002........................................................       3,081
2003 and thereafter.........................................       3,081
                                                                --------
                                                                $551,368
                                                                ========
</TABLE>
 
  Employment Agreements
 
     During 1991 the Company entered in an employment service termination
agreement with a former employee of the Company whereby the Company is required
to pay the former employee up to $25,000 upon a change in ownership of the
Company. As of December 31, 1998, no amount has been recorded in the financial
statements for this contingency.
 
     In December 1997, the Company entered into a one year employment agreement
with an employee of the Company. Pursuant to this agreement, upon the sale of a
majority of the Company's outstanding shares to a third party, the Company is
required to pay the employee 5.25 % of the amount of the sales price exceeding
$7,500,000 less certain expenses. As of December 31, 1998, no amount has been
recorded in the financial statements for this contingency.
 
4. RELATED PARTY TRANSACTIONS
 
     During 1996 the Company's two stockholders entered into a personal line of
credit agreement with a bank. During 1996 and 1997 the stockholders used the
proceeds from the line of credit agreement to advance the Company cash to
support operations and expansion. As of December 31, 1997 outstanding advances
due to the stockholders were approximately $111,000. The Company repays
principal and interest (approximately 8.25% annually), directly to the bank on
behalf of the stockholders. In December 1998, the Company repaid the advances
with proceeds from the line of credit (Note 5).
 
     In December 1997, the Company transferred title of two vehicles with a net
book value of approximately $27,000 to the stockholders and recorded non-cash
compensation.
 
     The Company paid interest of approximately $23,800 and $13,237 in 1997 and
1998, respectively.
 
5. LINE OF CREDIT
 
     In December 1998, the Company entered into a $462,000 line of credit
agreement with a financial institution. The line of credit bears interest at the
bank's prime rate plus 1% (8.75% at
 
                                      F-39
<PAGE>   93
                             JAMISON RESEARCH, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
December 31, 1998) and has a maturity date of November 30, 1999. Borrowings
under the line are secured by the personal assets and guarantee of the Company's
stockholder's and all business assets of the Company. At December 31, 1998, the
Company is in compliance with the terms and covenants of the line of credit
agreement. At December 31, 1998, approximately $115,000 was outstanding under
the line of credit.
 
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 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. These differences relate principally to reporting on
the cash basis for tax purposes. The Company paid no income taxes in 1997 or
1998.
 
<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                              --------------------
                                                                1997        1998
                                                              --------    --------
<S>                                                           <C>         <C>
     Deferred tax assets:
          Accrual to cash adjustments.......................  $154,000    $176,000
          Capitalized product development cost..............   (33,500)    (24,000)
          Other liabilities.................................     6,000      19,000
                                                              --------    --------
               Net deferred tax assets......................  $126,500    $171,000
                                                              ========    ========
</TABLE>
 
     The provision for income taxes at December 31 consisted of the following:
 
<TABLE>
<CAPTION>
                                                               1997       1998
                                                              ------    --------
<S>                                                           <C>       <C>
     Current................................................  $3,200    $ (3,200)
     Deferred...............................................     500     (44,500)
                                                              ------    --------
          Total.............................................  $3,700    $(47,700)
                                                              ======    ========
</TABLE>
 
     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>
                                                               1997        1998
                                                              -------    --------
<S>                                                           <C>        <C>
     Expected federal income tax benefit at 34%.............  $  (600)   $(56,800)
     State income taxes, net of federal benefit.............     (100)     (7,600)
     Expenses not deductible for tax purposes...............    7,100      16,700
     Graduated tax rate difference..........................   (2,700)         --
                                                              -------    --------
                                                              $ 3,700    $(47,700)
                                                              =======    ========
</TABLE>
 
7. NON CASH TRANSACTIONS
 
     The Company enters into arrangements with various vendors and service
providers whereby they provide various office equipment, office space and
services in exchange for licenses to access the Company's commercial real estate
database. As a result of these transactions, the Company recorded property and
equipment of approximately $52,000 and $25,500 in 1997 and 1998, with a
 
                                      F-40
<PAGE>   94
                             JAMISON RESEARCH, INC.
                  NOTES TO FINANCIAL STATEMENTS -- (CONTINUED)
 
corresponding credit to deferred revenue to be recognized in accordance with the
Company's revenue recognition policies. Further, the Company recognized service
revenues and expenses of approximately $53,000 and $117,064 in 1997 and 1998.
The value of the licenses has been determined to equal the fair value of the
equipment or services received and office space used.
 
8. SUBSEQUENT EVENTS
 
     On January 22, 1999, the Company was acquired by Realty Information Group,
Inc., in exchange for $5.28 million in cash and 448,031 shares of Realty
Information Group, Inc. Common Stock.
 
                                      F-41
<PAGE>   95
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
May 5, 1999
 
                        [Realty Information Group Logo]
 
                        3,350,000 SHARES OF COMMON STOCK
 
                            ------------------------
 
                                   PROSPECTUS
                            ------------------------
 
                          DONALDSON, LUFKIN & JENRETTE

                                 BT ALEX. BROWN

                                ALLEN & COMPANY
                                  INCORPORATED

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

                                 DLJDIRECT INC.
- --------------------------------------------------------------------------------
 
WE HAVE NOT AUTHORIZED ANY DEALER, SALES PERSON OR OTHER PERSON TO GIVE YOU
WRITTEN INFORMATION OTHER THAN THIS PROSPECTUS OR TO MAKE REPRESENTATIONS AS TO
MATTERS NOT STATED IN THIS PROSPECTUS. YOU MUST NOT RELY ON UNAUTHORIZED
INFORMATION. THIS PROSPECTUS IS NOT AN OFFER TO SELL THESE SECURITIES OR OUR
SOLICITATION OF YOUR OFFER TO BUY THE SECURITIES IN ANY JURISDICTION WHERE THAT
WOULD NOT BE PERMITTED OR LEGAL. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY
SALES MADE HEREUNDER AFTER THE DATE OF THIS PROSPECTUS SHALL IMPLY THAT THE
INFORMATION CONTAINED IN THIS PROSPECTUS OR THE AFFAIRS OF REALTY INFORMATION
GROUP, INC. HAVE NOT CHANGED SINCE THAT DATE.
- --------------------------------------------------------------------------------


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