LIGHTBRIDGE INC
10-Q, 1998-05-01
RADIOTELEPHONE COMMUNICATIONS
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<PAGE>
 
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                                   FORM 10-Q

(Mark One)

[X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE
     ACT OF 1934
     For the quarterly period ended March 31, 1998

OR

[_]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
     EXCHANGE ACT OF 1934
     For the transition period from _______________ to _______________

                      Commission File Number:  000-21319

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

          Delaware                                    04-3065140
(State or other jurisdiction of          (I.R.S employer identification number)
 incorporation or jurisdiction)


                            67 South Bedford Street
                        Burlington, Massachusetts 01803
         (Address of principal executive offices, including Zip Code)

                                (781) 359-4000
             (Registrant's telephone number, including area code)

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the preceding 12 months (or for such shorter period that the registrant was
required to file such reports), and (2) has been subject to such filing
requirements for the past 90 days:

  Yes      X        No 
         -----         -----     


As of April 1, 1998, there were 15,794,675 shares of the registrant's common
stock, $.01 par value, outstanding.
<PAGE>
 
                               LIGHTBRIDGE, INC.

                 Form 10-Q for the Quarter Ended March 31, 1998

                               Table of Contents

<TABLE> 
<CAPTION> 

                                                                                                       Page No.
                                                                                                       --------

<S>         <C>                                                                                       <C>
PART I.     FINANCIAL INFORMATION

Item 1.     Unaudited Condensed Consolidated Financial Statements:
            Balance Sheets as of March 31, 1998 and December 31, 1997...........................            3
            Income Statements for the three months ended March 31, 1998 and
              March 31, 1997....................................................................            4
            Statements of Cash Flow for the three months ended March 31, 1998
              and March 31, 1997................................................................            5
            Notes to Unaudited Condensed Consolidated Financial Statements......................            6
 
Item 2.     Management's Discussion and Analysis of Financial Condition and
            Results of Operations...............................................................            7
 
PART II.  OTHER INFORMATION
 
Item 6.     Exhibits and Reports on Form 8-K....................................................           12
Signature. .....................................................................................           13
</TABLE> 
<PAGE>
 
PART I.   FINANCIAL INFORMATION

ITEM 1.  UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

                       LIGHTBRIDGE, INC. AND SUBSIDIARIES
                UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                                              March 31, 1998         December 31, 1997
                                                                              --------------         -----------------
<S>                                                                           <C>                     <C>
                               ASSETS
                               ------
Current assets:
   Cash and cash equivalents                                                    $ 12,762,060             $ 15,715,726
   Accounts receivable - net                                                      14,700,335               13,213,052
   Other current assets                                                            2,917,004                2,885,583
                                                                                ------------             ------------ 
      Total current assets                                                        30,379,399               31,814,361
Property and equipment - net                                                      11,791,647               11,763,013
Goodwill - net                                                                     5,734,510                6,286,931
Other assets                                                                       1,866,414                2,087,676
                                                                                ------------             ------------ 
      Total assets                                                              $ 49,771,970             $ 51,951,981
                                                                                ============             ============ 
                LIABILITIES AND STOCKHOLDERS' EQUITY
                ------------------------------------
Current liabilities:
   Accounts payable and accrued liabilities                                     $  5,230,359             $  8,164,817
   Short-term borrowings and current portion of notes payable                        805,205                  805,205
   Deferred revenues                                                               2,139,526                1,658,406
                                                                                ------------             ------------ 
      Total current liabilities                                                    8,175,090               10,628,428
Other long-term liabilities                                                        1,128,712                  823,346
Notes payable                                                                      1,080,219                1,397,614
                                                                                ------------             ------------ 
      Total liabilities                                                           10,384,021               12,849,388
                                                                                ------------             ------------ 
 
Commitments and contingencies
 
Stockholders' equity:
   Preferred stock, $.01 par value; 5,000,000 shares authorized; 
     no shares issued or outstanding at March 31, 1998 and 
     December 31, 1997, respectively                                                      --                       --
 
   Common stock, $.01 par value; 60,000,000 shares authorized;
     16,621,967 and 16,492,954 shares issued; 15,794,675 and
     15,665,662 shares outstanding at March 31, 1998 and 
     December 31, 1997, respectively                                                 166,219                  164,929
   Additional paid-in capital                                                     53,852,248               53,660,991
   Warrants                                                                          598,875                  598,875
   Accumulated deficit                                                           (13,604,430)             (13,697,239)
                                                                                ------------             ------------ 
      Total                                                                       41,012,912               40,727,556
   Less treasury stock, at cost                                                   (1,624,963)              (1,624,963)
                                                                                ------------             ------------ 
      Total stockholders' equity                                                  39,387,949               39,102,593
                                                                                ------------             ------------ 
          Total liabilities and stockholders' equity                            $ 49,771,970             $ 51,951,981
                                                                                ============             ============
</TABLE>



       See notes to unaudited condensed consolidated financial statements

                                       3
<PAGE>
 
                       LIGHTBRIDGE, INC. AND SUBSIDIARIES
               UNAUDITED CONDENSED CONSOLIDATED INCOME STATEMENTS


<TABLE>
<CAPTION>
                                                    Three months ended March 31,
                                            --------------------------------------------
                                                    1998                     1997
                                            -------------------       ------------------
<S>                                         <C>                            <C>
Revenues                                            $13,302,816               $8,822,838
Cost of revenues                                      6,299,709                4,168,670
                                            -------------------       ------------------
Gross profit                                          7,003,107                4,654,168
                                            -------------------       ------------------
Operating expenses:                         
   Development                                        2,292,097                1,330,919
   Sales and marketing                                1,955,937                1,256,417
   General and administrative                         2,807,512                1,145,626
                                            -------------------       ------------------
Total operating expenses                              7,055,546                3,732,962
                                            -------------------       ------------------
                                            
Income (loss) from operations                           (52,439)                 921,206
Other income (expense):                     
   Interest income                                      228,967                  319,816
   Interest expense                                     (65,840)                (107,855)
   Other non-operating income (expense)                  39,022                   (9,280)
                                            -------------------       ------------------
                                            
Income before provision for income taxes                149,710                1,123,887
Provision for (benefit from) income taxes                56,900                 (643,939)
                                            -------------------       ------------------
Net income                                          $    92,810               $1,767,826
                                            ===================       ==================
Basic earnings per common share                           $0.01                    $0.12
                                            ===================       ==================
Diluted earnings per common share                         $0.01                    $0.11
                                            ===================       ==================
</TABLE>



       See notes to unaudited condensed consolidated financial statements

                                       4
<PAGE>
 
                       LIGHTBRIDGE, INC. AND SUBSIDIARIES
            UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW

<TABLE>
<CAPTION>
                                                                                Three months ended March 31,
                                                                        ---------------------------------------------
                                                                                 1998                     1997
                                                                        -----------------------   -------------------
<S>                                                                      <C>                      <C>
Cash Flows From Operating Activities:
   Net income                                                                    $    92,810              $ 1,767,826
   Adjustments to reconcile net income to net cash (used in)
     provided by operating activities:
   Depreciation and amortization                                                   2,124,086                  986,904
   Amortization of discount on notes                                                   8,906                    9,016
   Deferred tax assets                                                                    --                 (795,100)
   Changes in assets and liabilities:
   Accounts receivable and other current assets                                   (1,518,705)              (1,134,203)
   Other assets                                                                     (122,699)                  35,719
   Accounts payable and accrued liabilities                                       (2,899,019)                (418,828)
   Deferred revenues                                                                 481,120                  411,077
   Other liabilities                                                                 373,859                       --
                                                                        -----------------------   -------------------
   Net cash (used in) provided by operating activities                            (1,459,642)                 862,411
                                                                        -----------------------   -------------------
Cash Flows From Investing Activities:
   Purchases of property and equipment                                            (1,256,338)              (1,175,294)
   Purchase of investments                                                                --               (2,069,323)
                                                                        -----------------------   -------------------
   Net cash used in investing activities                                          (1,256,338)              (3,244,617)
                                                                        -----------------------   -------------------
Cash Flows From Financing Activities:
   Payments on notes payable                                                        (326,301)                (176,301)
   Principal payments under capital lease obligations                               (103,932)                (476,895)
   Proceeds from issuance of common stock                                            192,547                   17,862
                                                                        -----------------------   -------------------
   Net cash used in financing activities                                            (237,686)                (635,334)
                                                                        -----------------------   -------------------
Net decrease in cash and cash equivalents                                         (2,953,666)              (3,017,540)
Cash and cash equivalents, beginning of period                                    15,715,726               27,900,802
                                                                        -----------------------   -------------------
Cash and cash equivalents, end of period                                         $12,762,060              $24,883,262
                                                                        =======================   ===================
</TABLE>



       See notes to unaudited condensed consolidated financial statements

                                       5
<PAGE>
 
                       LIGHTBRIDGE, INC. AND SUBSIDIARIES
         NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

1. Basis of Presentation:

   The condensed consolidated financial statements included herein have been
prepared by Lightbridge, Inc. (the "Company"), without audit, pursuant to the
rules and regulations of the Securities and Exchange Commission.  Although
certain information and footnote disclosures normally included in the Company's
annual financial statements have been omitted, the Company believes that the
disclosures are adequate to make the information presented not misleading and
reflect all adjustments (consisting only of normal recurring adjustments) which
are necessary for a fair presentation of results of operations for such periods.
Results of interim periods may not be indicative of results for the full year.
These financial statements should be read in conjunction with the consolidated
financial statements and notes thereto included in the Company's Annual Report
on Form 10-K for the year ended December 31, 1997.

2. Significant Accounting Policies:

Software Revenue Recognition

   During the first quarter of 1998, the Company adopted the provisions of
Statement of Position 97-2, "Software Revenue Recognition" ("SOP 97-2").  SOP
97-2 provides guidance on applying generally accepted accounting principles in
recognizing revenue on software transactions and supersedes Statement of
Position 91-1, "Software Revenue Recognition."  The adoption of SOP 97-2 had no
effect on the Company's reported revenues for the quarter ended March 31, 1998.
However, there can be no assurance that the provisions of SOP 97-2 will not
affect revenues from future software transactions entered into by the Company.

Earnings Per Share

   During the fourth quarter of 1997, the Company adopted Statement of Financial
Accounting Standards No. 128, "Earnings per Share."  The Statement simplifies
the standards for computing earnings per share ("EPS") and makes them comparable
to international EPS standards.  The Statement replaces primary EPS with basic
EPS.  Basic EPS is computed by dividing income available to common stockholders
by the weighted-average number of common shares outstanding for the period.
Diluted EPS reflects the potential dilution that could occur if securities or
other contracts to issue common stock were exercised or converted into common
stock or resulted in the issuance of common stock.  Diluted EPS is computed
similarly to fully diluted EPS previously presented.  In accordance with the
standard, all prior period EPS data have been restated.

                                       6
<PAGE>
 
   A reconciliation of the numerators and denominators of the basic and diluted
EPS computations for income (loss) from continuing operations is shown below:

<TABLE>
<CAPTION>
                                                                        Income           Shares      Earnings (Loss)
                                                                      (Numerator)     (Denominator)     per Share
                                                                      -----------     ------------   ---------------
<S>                                                                   <C>             <C>            <C> 
Three Months Ended March 31, 1998                                                                    
Basic EPS:                                                                                            
   Income available to common shareholders.....................        $   92,810       15,707,303          $0.01
                                                                                                     
Effect of dilutive securities                                                                        
   Options and warrants........................................                          2,097,814   
                                                                                      ------------  
                                                                                                     
Diluted EPS:                                                                                          
   Income available to common shareholders.....................        $   92,810       17,805,117          $0.01
                                                                                      ============                   
                                                                                                                         
                                                                                                     
Three Months Ended March 31, 1997                                                                    
Basic EPS:                                                                                            
   Income available to common shareholders.....................        $1,767,826       14,611,646          $0.12
                                                                                                     
Effect of dilutive securities                                                                        
   Options and warrants........................................                          1,810,305   
                                                                                      ------------     
                                                                                                      
Diluted EPS:
   Income available to common shareholders.....................        $1,767,826       16,421,951          $0.11
                                                                                      ============ 
</TABLE>

Reclassifications

   Certain reclassifications have been made to the 1997 financial statements to
conform with the 1998 presentation.

                                       7
<PAGE>
 
ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS 
        OF OPERATIONS


   THE DISCUSSION IN THIS FORM 10-Q CONTAINS FORWARD-LOOKING STATEMENTS WITHIN
THE MEANING OF SECTION 27A OF THE SECURITIES ACT OF 1933 AND SECTION 21E OF THE
SECURITIES EXCHANGE ACT OF 1934.  THE COMPANY'S ACTUAL RESULTS COULD DIFFER
MATERIALLY FROM THE RESULTS CONTEMPLATED IN THE FORWARD-LOOKING STATEMENTS AS A
RESULT OF A NUMBER OF FACTORS, INCLUDING (A) CONTINUING RAPID CHANGE IN THE
TELECOMMUNICATIONS INDUSTRY THAT MAY AFFECT BOTH LIGHTBRIDGE AND ITS CUSTOMERS,
(B) CUSTOMER CONCENTRATION, (C) UNCERTAINTIES ASSOCIATED WITH LIGHTBRIDGE'S
ABILITY TO DEVELOP NEW PRODUCTS AND TECHNOLOGIES, (D) MARKET ACCEPTANCE OF
LIGHTBRIDGE'S NEW PRODUCTS AND CONTINUING DEMAND FOR LIGHTBRIDGE'S PRODUCTS BY
TELECOMMUNICATIONS COMPANIES, (E) THE IMPACT OF COMPETITIVE PRODUCTS AND PRICING
ON BOTH LIGHTBRIDGE AND ITS CUSTOMERS, (F) MANAGEMENT OF GROWTH, AND (G) THE
OTHER FACTORS SET FORTH UNDER "ITEM 1A. Risk Factors" IN THE COMPANY'S ANNUAL
REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 1997.  Information set forth
under the heading "ITEM 1A.  Risk Factors" in the Company's Annual Report on
Form 10-K for the year ended December 31, 1997 is incorporated as an exhibit to
this Quarterly Report.

   CHURNALERT, FRAUDBUSTER and PROFILE are registered trademarks of the Company,
and LIGHTBRIDGE, POPS and SAMS are trademarks of the Company.  All other
trademarks or trade names referred to in this Form 10-Q are the property of
their respective owners.

RESULTS OF OPERATIONS

   OVERVIEW

   Lightbridge develops, markets and supports a network of integrated products
and services that enable telecommunications carriers to improve their customer
acquisition and retention processes.

   In November 1997, the Company acquired all of the outstanding stock of Coral
Systems, Inc. ("Coral"), pursuant to an Agreement and Plan of Reorganization
dated as of September 9, 1997 (the "Reorganization Agreement"). The acquisition
was effected through a reverse triangular merger (the "Merger") in which a newly
formed subsidiary of Lightbridge was merged with and into Coral and the
surviving corporation became a wholly owned subsidiary of the Company. Pursuant
to the Merger, each of the outstanding shares of Coral's stock was converted
into a fraction of a share of Lightbridge's common stock, determined as set
forth in the Reorganization Agreement. In addition, as a result of the Merger,
all options and warrants to purchase shares of Coral's stock became exercisable,
when vested, to purchase shares of Lightbridge's common stock. As a result of
the Merger, Lightbridge issued 892,073 shares of its common stock for all of the
outstanding shares of Coral's common stock and reserved 114,399 shares of its
common stock for Coral's options and warrants. The merger has been accounted for
using the purchase method, which combines the results of Coral from the date of
acquisition with those of the Company.  As a result, the Company's results of
operation include Coral's results for the three months ended March 31, 1998, but
not for the three months ended March 31, 1997.

   Coral provides client-server software products for the wireless
telecommunications industry to enable carriers to reduce fraud and customer
turnover, or "churn," and increase operating efficiencies. Coral's products are
based upon its core technology, which is designed to provide several advantages,
including rapid product development, portability, technology independence and
enhanced scalability. Coral's fraud management software, FraudBuster,
incorporates a fraud profiler and subscription fraud monitoring functionality
and is designed to combat most currently identified types of wireless fraud.
FraudBuster detects multiple types of existing and emerging fraud,

                                       8
<PAGE>
 
including cloning, subscription fraud, tumbling fraud and cellular telephone
theft. Coral's churn prevent product, ChurnAlert, allows carriers to analyze and
identify potential churn candidates before they seek customer service assistance
or deactivate service.

   Lightbridge's transaction revenues are derived primarily from the processing
of applications of subscribers for wireless telecommunications services and the
activation of service for those subscribers. Over time, the Company has expanded
its offerings from credit evaluation services to include screening for
subscriber fraud, evaluating carriers' existing accounts, interfacing with
carrier and third-party systems and providing teleservices call center services.
These services are provided pursuant to contracts with carriers which specify
the services to be utilized and the markets to be served. Generally, the
Company's clients are charged on a per transaction or, to a lesser extent, on a
per minute basis.  Pricing varies depending primarily on the volume of
transactions, the type and number of other products and services selected for
integration with the services and the term of the contract under which services
are provided. The volume of processed transactions varies depending on seasonal
and retail trends, the success of the carriers utilizing the Company's services
in attracting subscribers and the markets served by the Company for its clients.
Revenues are recognized in the period when the services are performed.

   The Company's software and services revenues have been derived primarily
from developing customized software and providing consulting services. The
Company also began licensing its Channel Solutions software with the
introduction of its POPS product in fiscal 1995 and its SAMS software in 1996.
Lightbridge's Channel Solutions products and services are designed to assist
customers in interfacing with the Company's systems and are being marketed
primarily to wireless telecommunications carriers that utilize the Company's
transaction processing services. The Company's Customer Management products are
being designed to help carriers analyze their marketplace to improve their
business operations. While its Channel Solutions and Fraud Management products
are, and its Customer Management and ChurnAlert products are currently expected
to be, licensed as packaged software products, each of these products requires
customization and integration with other products and systems to varying
degrees. Revenues derived from consulting and other projects are recognized
throughout the performance period of the contracts. Revenues from licensing
software are recognized at the later of delivery of the licensed product or
satisfaction of acceptance criteria. Lightbridge's software and services
revenues depend primarily on the continuing need for integration of diverse
systems and acceptance of the Company's software products by the Company's
existing and new clients.

   Lightbridge is seeking to broaden and strengthen its management team.  First,
the Company expects to engage a new head of worldwide sales and marketing in
late April 1998.  Second, during the three months ending June 30, 1998,
Lightbridge expects to consolidate its consulting services group and to name a
vice president to head the new group.  Third, the Company is seeking to hire a
new chief financial officer who will have responsibility for matters such as the
Company's financial reporting systems, business measures and analysis, and
relationships with public market analysts and investors.

                                       9
<PAGE>
 
   RESULTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                       Three Months Ended March 31,
                                                              ---------------------------------------------
                                                                      1998                      1997
                                                              --------------------      -------------------
<S>                                                            <C>                      <C>
Revenues:
   Transaction............................................                   58.7%                     68.3%
   Software and services..................................                   41.3                      31.7
                                                              --------------------      -------------------
                                                                            100.0                     100.0
Cost of revenues..........................................                   47.4                      47.3
                                                              --------------------      -------------------
Gross profit..............................................                   52.6                      52.7
                                                              --------------------      -------------------
 
Operating expenses:
   Development............................................                   17.2                      15.1
   Sales and marketing....................................                   14.7                      14.2
   General and administrative.............................                   21.1                      13.0
                                                              --------------------      -------------------
      Total operating expenses............................                   53.0                      42.3
                                                              --------------------      -------------------
Income (loss) from operations.............................                   (0.4)                     10.4
Other income (expense), net...............................                    1.5                       2.3
                                                              --------------------      -------------------
Income before income taxes................................                    1.1                      12.7
Provision for (benefit from) income taxes.................                    0.4                      (7.3)
                                                              --------------------      -------------------
Net income................................................                    0.7%                     20.0%
                                                              ====================      ===================
</TABLE>

   Revenues. Revenues increased by 50.8% to $13.3 million in the three months
   --------                                                                  
ended March 31, 1998 from $8.8 million in the three months ended March 31, 1997.

   Transaction revenues increased by 29.7% to $7.8 million in the three months
ended March 31, 1998 from $6.0 million in the three months ended March 31, 1997.
The increase in transaction revenues for the three months ended March 31, 1998
was primarily due to increased volume of qualification and activation
transactions processed for carrier clients.

   Software and services revenues increased by 96.3% to $5.5 million in the
three months ended March 31, 1998 from $2.8 million in the three months ended
March 31, 1997. The increase in software and services revenues for the three
months ended March 31, 1998 was principally a result of the increase in revenues
attributable to the Company's Channel Solutions and Fraud Management products
and services.  Increased revenues from Fraud Management products resulted in
part from the inclusion of sales of Coral products in the three months ended
March 31, 1998.  Software and services revenues for the three months ended March
31, 1998 were adversely affected by (i) a lower-than-expected level of
consulting projects from the Company's largest client and (ii) the Company's
inability, under governing revenue recognition policies, to recognize revenue
from Fraud Management software that was installed for a new international client
but which had not been fully accepted by the client as of March 31, 1998 under
the terms of the client's contract with the Company.  Lightbridge expects to
recognize the revenue from this Fraud Management software during the three
months ending June 30, 1998, although there can be no assurance that the
required contractual acceptance will be received by this time or at any time.

   Cost of Revenues.  Cost of revenues consists primarily of personnel costs,
   ----------------                                                          
costs of maintaining systems and networks used in processing qualification and
activation transactions (including depreciation and amortization of those
systems and networks) and amortization of capitalized software. Cost of revenues
may vary as a percentage of total revenues in the future as a result of a number
of factors, including changes in the mix of transaction revenues between
revenues from on-line transaction processing and revenues from processing
transactions through the Company's Teleservices Group and changes in the mix of
total revenues between transaction revenues and software and services revenues.

   Cost of revenues increased by 51.1% to $6.3 million in the three months ended
March 31, 1998 from $4.2 million in the three months ended March 31, 1997, while
increasing slightly as a percentage of total revenues to 47.4% from 47.3%. The
dollar increase in costs for the three months ended March 31, 1998 resulted
principally 

                                       10
<PAGE>
 
from increases in transaction volume and costs attributable to expansion of the
Company's staff and systems capacity through the Company's acquisition of Coral
and through internal growth.

   Development.  Development expenses consist primarily of personnel and outside
   -----------                                                                  
technical services costs related to developing new products and services,
enhancing existing products and services, and implementing and maintaining new
and existing products and services.  Development expenses also include software
development costs incurred prior to the establishment of technological
feasibility.

   Development expenses increased by 72.2% to $2.3 million in the three months
ended March 31, 1998 from $1.3 million in the three months ended March 31, 1997,
while increasing as a percentage of total revenues to 17.2% from 15.1%. The
dollar increase in costs for the three months ended March 31, 1998 resulted
primarily from the addition of engineering personnel necessary to support the
Company's product development plans, including personnel employed by Coral.  The
Company expects to continue to increase its engineering and development efforts
in order to continue enhancing its existing products and services, including its
Channel Solutions and Fraud Management products and services, as well as to
develop new products and services.

   Sales and Marketing.  Sales and marketing expenses consist primarily of
   -------------------                                                    
salaries, commissions and travel expenses of direct sales and marketing
personnel, as well as costs associated with advertising, trade shows and
conferences. Sales and marketing expenses increased by 55.7% to $2.0 million in
the three months ended March 31, 1998 from $1.3 million in the three months
ended March 31, 1997, and increased as a percentage of total revenues to 14.7%
from 14.2%.  Both the dollar increase and the increase as a percentage of total
revenues for the three months ended March 31, 1998 were due to the addition of
direct sales and product marketing personnel, increased commissions resulting
from the higher level of revenues and increased use of marketing programs,
including trade shows. The dollar increase also reflected costs of Coral's sales
and marketing personnel and activities.  The Company continues to invest in
sales and marketing efforts in order to increase its penetration of existing
accounts and to add new clients and markets.

   General and Administrative.  General and administrative expenses consist
   --------------------------                                              
principally of salaries of administrative, executive, finance and human
resources personnel, fees for outside professional services, and amortization of
goodwill incurred pursuant to the acquisition of Coral.  General and
administrative expenses increased by 145.1% to $2.8 million in the three months
ended March 31, 1998 from $1.1 million in the three months ended March 31, 1997,
and increased as a percentage of total revenues to 21.1% from 13.0%.  Both the
dollar increase and the increase as a percentage of total revenues resulted
primarily from amortization of $0.7 million of goodwill and acquired technology,
certain costs associated with the integration of Coral, and the addition of
finance and human resource personnel.  The Company believes that the remaining
costs associated with the integration of Coral will be incurred in the three
months ending June 30, 1998 and will not exceed $100,000.

   Other Income (Expense) Net.  Other income (expense) in the three months ended
   --------------------------                                                   
March 31, 1998 consists predominantly of interest income and expense.  Interest
expense consists of interest, commitment fees and other similar fees payable
with respect to the Company's bank lines of credit, subordinated notes and
capital leases. Interest expense remained the same at $0.1 million in the three
months ended March 31, 1998 and 1997.  Interest income decreased to $0.2 million
in the three months ended March 31, 1998 from $0.3 million in the three months
ended March 31, 1997 as a result of lower cash balances due to the investment
made in the service delivery infrastructure and computer equipment for
development activities of the business during 1997.

   Provision for (Benefit from) Income Taxes.  During the three months ended
   -----------------------------------------                                
March 31, 1998, the Company recorded a net income tax provision of $0.1 million.
During the three months ended March 31, 1997, the Company recorded a net income
tax benefit of $0.6 million, which was derived from the reversal of its deferred
tax valuation allowance and  the utilization of certain tax credits, net of a
provision of $0.5 million.

                                       11
<PAGE>
 
LIQUIDITY AND CAPITAL RESOURCES

   Prior to its initial public offering, the Company funded its operations
primarily through private placements of equity and debt securities, cash
generated from operations, bank borrowings and equipment financings.

   In October 1996, the Company consummated an initial public offering in which
4,370,000 shares of the Company's common stock, $.01 par value, were sold at an
initial public offering price of $10.00 per share.  The total shares consisted
of 3,021,868 shares sold by the Company and 1,348,132 shares sold by selling
shareholders.  Proceeds to the Company, net of underwriters' discount and
associated costs, were approximately $27.1 million.  These proceeds were used to
repay certain debt obligations of the Company, to repurchase certain shares of
the common stock of the Company and to fund working capital and other general
corporate purposes.

   The Company has a $4.0 million working capital line of credit and a $2.0
million equipment line of credit with Silicon Valley Bank (the "Bank").  The
working capital line of credit is secured by a pledge of the Company's accounts
receivable, equipment and intangible assets, and borrowing availability is based
on the amount of qualifying accounts receivable. Advances under the working
capital line of credit and equipment line of credit bear interest at the Bank's
prime rate (8.5% at March 31, 1998).  The working line of credit also provides
for the issuance of letters of credit, which reduce the amount Lightbridge may
borrow under the line of credit and are limited to $1,250,000 in the aggregate.
At March 31, 1998, there were no borrowings outstanding under the working
capital line of credit and borrowings of $0.4 million were outstanding under the
equipment line of credit. The agreements contain covenants that, among other
things, prohibit the declaration or payment of dividends and require the Company
to maintain certain financial ratios which the Company believes are not
restrictive to the business operations. The working capital line of credit
expires in June 1998, and the equipment line of credit expires in June 1999.
The Company expects to renew the working capital line of credit with
substantially the same terms that currently exist.  On March 24, 1998, the
Company and the Bank entered into a commitment letter that contemplates (i) an
extension of the working capital line of credit until June 1999 and (ii) an
increase in the equipment line of credit to $3.0 million and an extension in the
equipment line of credit to six years from the date of closing.  The Company
anticipates that the definitive documentation for the changes contemplated by
the commitment letter will be entered into during the quarter ending June 30,
1998.

   The Company's capital expenditures in the three months ended March 31, 1998
and 1997 aggregated $1.3 million and $1.2 million, respectively. The capital
expenditures consisted of purchases of fixed assets, principally for the
Company's services delivery infrastructure and computer equipment for
development activities. The Company expects capital expenditures for the
remainder of 1998 to approximate $3.0 million, including capital expenditures
related to the relocation of Coral's offices.  The Company leases its facilities
and certain equipment under non-cancelable capital and operating lease
agreements that expire at various dates through December 2002.

   Further expansion of the Company's business, including the acquisition of
additional computer and network equipment and the relocation of the offices of
Coral in Colorado, will require the Company to make significant capital
expenditures. The Company may also be required to make significant expenditures
in connection with the on-going design and testing of its software-based
services and products for Year 2000 compatibility, and any related modifications
or other developmental work that may be required to cause those services and
products to be Year 2000 compatible. Because the Company has not completed a
significant portion of its Year 2000 testing, the Company currently is unable to
estimate accurately the amount of these expenditures.

   As of March 31, 1998, the Company had cash and cash equivalents of $12.8
million and working capital of $22.2 million.  The Company believes that the
current cash balances and funds available under existing lines of credit, will
be sufficient to finance the Company's operations and capital expenditures for
at least the next twelve months.

                                       12
<PAGE>
 
INFLATION

   Although certain of the Company's expenses increase with general inflation in
the economy, inflation has not had a material impact on the Company's financial
results to date.

RECENT ACCOUNTING PRONOUNCEMENTS

   In June 1997, the FASB released Statement of Financial Accounting Standards
No. 130, "Reporting Comprehensive Income" ("SFAS No. 130"), which is effective
for fiscal 1998.  SFAS No. 130 requires that all items that are required to be
recognized under accounting standards as components of comprehensive income be
reported in a financial statement that is displayed with the same prominence as
other financial statements. While the Company is in the process of evaluating
the impact of SFAS No. 130, it does not expect that the adoption will have an
impact on the Company's future consolidated results of operations, financial
position or cash flows.

   In June 1997, the FASB released Statement of Financial Accounting Standards
No. 131, "Disclosures about Segments of an Enterprise and Related Information"
("SFAS No. 131"), which is effective for fiscal 1998.  SFAS No. 131 establishes
standards for the way that public business enterprises report information about
operating segments in annual financial statements and requires that those
enterprises report selected information about operating segments in interim
financial reports issued to shareholders.  While the Company is in the process
of evaluating the impact of SFAS No. 131, it does not expect that the adoption
will have a material impact on the Company's financial position or results of
operations.

                                       13
<PAGE>
 
PART II.  OTHER INFORMATION


ITEM 6.   EXHIBITS AND REPORTS ON FORM 8-K

(a)  Exhibits

    10.1  Office Building Lease dated March 12, 1998, between 8900 Grantline 
          Road Investors and Lightbridge, Inc.
    27.1  Financial Data Schedule for the three months ended March 31, 1998
    99.1  Information set forth under the heading "ITEM 1A. Risk Factors" in the
          Company's Annual Report on Form 10-K for the year ended December 31,
          1997 is incorporated herein by reference.
- --------------

(b)   Reports on Form 8-K filed in the first quarter of 1998

   On January 21, 1998, the Company filed a Current Report on Form 8-K/A
amending financial statements, exhibits or other portions of its Current Report
on Form 8-K dated November 7, 1997.

                                       14
<PAGE>
 
                                   SIGNATURE

   Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.


                                  LIGHTBRIDGE, INC.
 
 
Dated:  April 24, 1998            By:  /s/ William G. Brown
                                       ---------------------------------------
                                       William G. Brown
                                       Chief Financial Officer, Vice President
                                       of Finance and Administration, and
                                       Treasurer (Authorized Officer and
                                       Principal Financial and Accounting
                                       Officer)

                                       15

<PAGE>

                                                                   Exhibit 10.1

================================================================================

                             OFFICE BUILDING LEASE
                      (FOR USE IN THE STATE OF COLORADO)

================================================================================


     --------
1.    PARTIES
     --------

     This Office Building Lease ("LEASE"), dated for reference purposes only
     March 12, 1998 ("LEASE DATE"), is entered into between 8900 GRANTLINE ROAD
     INVESTORS, a California general partnership, PANATTONI, JOHNSON & LOORZ, a
     California general partnership, and BENJAMIN S. CATLIN, as tenants-in-
     common (herein called "LANDLORD"), and LIGHTBRIDGE INC., a Delaware
     corporation (herein called "TENANT").

     ----------
2.    PREMISES
     ----------

     (a)  Landlord does hereby lease to Tenant and Tenant hereby leases from
     Landlord that certain space (herein called "PREMISES"), consisting of
     approximately thirty thousand six hundred sixty-seven (30,667) rentable
     square feet, known as "SUITE ________," at the building ("BUILDING"),
     consisting of approximately forty thousand two hundred twelve (40,212)
     rentable square feet located at 320 Interlocken Parkway, Broomfield,
     Colorado, shown on Exhibit A attached hereto and hereby made a part hereof,
                        --------- 
     including the Tenant Improvements ("TENANT IMPROVEMENTS") to be constructed
     in accordance with the "WORK LETTER AGREEMENT" attached as Exhibit B
                                                                --------- 
     hereto. Said Lease is subject to the terms, covenants and conditions herein
     set forth and the Tenant covenants as a material part of the consideration
     for this Lease to keep and perform each and all of said terms, covenants
     and conditions by it to be kept and performed and that this Lease is made
     upon the condition of said performance.

     (b)  The demise of the Premises contained herein shall include a non-
     exclusive right for Tenant to use all portions of the Building and the
     common areas thereof designated by Landlord for the common use of all
     tenants including, without limitation, hallways, restrooms, stairs,
     entrances, lobby areas, elevators, parking spaces, driveways and loading
     areas. Landlord shall not alter or reduce the common areas or the Premises
     in a manner which interferes with Tenant's use or enjoyment of the
     Premises.

     (c)  Tenant acknowledges that, as of the Lease Date, Landlord has commenced
     construction of the Building. In this regard, Landlord intends to complete
     construction of the Building and Tenant Improvements in accordance with the
     provisions of the Work Letter Agreement on or before the Expected Occupancy
     Date (as hereinafter defined) in compliance with all applicable laws,
     statutes and ordinances and completed in a good workmanlike order. Prior to
     the Commencement Date, Landlord shall cause the Building to be measured to
     determine the rentable and usable square footage of the Building, and the
     Premises, which measurement shall be approved by Tenant and Tenant's
     representatives. Such usable measurement shall be in compliance with the
     Building Owners and Managers Association Standard Method for Measuring
     Floor Area within Office Buildings (ANSI Z65.1-1996). With regard to
     determining the rentable area of the Premises, such determination shall be
     reasonably made by Landlord taking all relevant factors into consideration;
     provided, however in no event shall the resulting load factor be greater
     than twelve and one-half percent (12.50%). Landlord shall provide Tenant
     with a written summary setting forth the determination of the usable and
     rentable square footage of the Premises and of "Tenant's Share" as such
     term is applied to Tenant's obligation to pay a portion of Direct Expenses
     (as defined below) prior to the Commencement Date. Such measurements shall
     be confirmed in the First Amendment to Lease and Acknowledgment (as
     hereinafter defined) and if such measurement is different than the square
     footage set forth in Section 2(a) above, Base Rent shall be correspondingly
     adjusted.

     ------
3.    TERM 
     ------

     This Lease is effective between Landlord and Tenant as of the Lease Date.
     The term of this Lease shall commence upon the earlier of the following
     dates ("COMMENCEMENT DATE"): (i) the date on which the Premises are
     Substantially Completed (as defined below), which is expected to be on
     August 1, 1998 ("EXPECTED OCCUPANCY DATE"): (ii) the date on which the
     Premises would have been Substantially Completed had there been no delays
     caused by or attributable to Tenant; or (iii) the date upon which Tenant
     takes possession of the Premises with Landlord's written consent. Within
     thirty (30) days after the Commencement Date, Landlord and Tenant shall
     execute and amend an amendment to this Lease ("FIRST AMENDMENT TO LEASE AND
     ACKNOWLEDGEMENT") setting forth the Commencement Date, and the expiration
     date of the term of the Lease, the rentable area of the Premises and
     adjustments to the Base Rent as a result of an increase or decrease in the
     rentable area of the Premises which shall be in the form attached hereto as
     Exhibit C. The Premises shall be deemed to be "SUBSTANTIALLY COMPLETE" when
     ---------
     (i) Tenant has direct access to the Premises with building services ready
     to be furnished to Premises and all construction to be performed by
     Landlord, as set forth in the Work Letter Agreement has been completed,
     with the exception of the Punch List Items (as hereinafter defined) that do
     not materially adversely affect Tenant's use of the Premises as reasonably
     determined by Landlord and Tenant, and (ii) a certificate of occupancy has
     been issued for the Premises. The term of this Lease shall be for a period
     of five (5) years following the Commencement Date.

     ------------
4.    POSSESSION
     ------------

     (a)  If the Landlord, for any reason whatsoever, cannot deliver possession
     of the said Premises to the Tenant by the Expected Occupancy Date, this
     Lease shall not be void or voidable, nor shall the expiration date of the
     above term in any way be extended, but in that event, all rent shall be
     abated during the period between the commencement of said term and the time
     when Landlord delivers

                                      -1-
<PAGE>
 
     possession. In the event that Landlord fails to give possession of the
     Premises to Tenant prior to the one hundred twentieth (120th) day following
     the Expected Occupancy Date (the"DELAY DATE"), Tenant, for a period of
     twenty (20) days thereafter, may, in Tenant's sole determination, terminate
     this Lease upon written notice to Landlord and Landlord shall return any
     payments made by Tenant to Landlord within five (5) business days of such
     termination. Notwithstanding the foregoing, the Delay Date shall be
     extended by the number of days resulting from (i) any delays beyond the
     reasonable control of Landlord, such as acts of God, fire, earthquake, acts
     of a public enemy, riot, insurrection, unavailability of materials,
     governmental restrictions on the sale of materials or supplies or on the
     transportation of such materials or supplies, strike directly affecting
     construction or transportation of materials or supplies, shortages of
     materials or labor resulting from governmental controls, weather
     conditions, or any other cause or events beyond the reasonable control of
     Landlord (collectively, "FORCE MAJEURE EVENT"), which delays shall not
     exceed a maximum of fifteen (15) days, or (ii) delays caused by or
     attributable to Tenant.

     (b)  In the event that Landlord shall permit Tenant to occupy the Premises
     prior to the Commencement Date of the term, such occupancy shall be subject
     to all the provisions of this Lease. Said early possession shall not
     advance the termination date hereinabove provided.

     (c)  Tenant's taking possession of the Premises shall constitute Tenant's
     acknowledgment that the Premises are in good condition, and that Tenant
     agrees to accept the same in its condition existing as of the date of such
     entry and subject to all applicable municipal, county, state and federal
     statutes, laws, ordinances, including zoning ordinances, and regulations
     governing and relating to the use, occupancy or possession of the Premises.
     Notwithstanding the foregoing, within sixty (60) days after the Tenant
     takes possession of the Premises, Tenant shall deliver to Landlord a list
     of items ("PUNCH LIST ITEMS") that Tenant reasonably deems that Landlord
     complete or correct in order for the Premises to be reasonably acceptable.
     Landlord shall complete and/or correct such items set forth on the Punch
     List Items using its good faith efforts and due diligence; provided,
     however, that with respect to those items that Landlord reasonably contends
     do not require completion and/or correction, Landlord and Tenant shall
     negotiate in good faith for a resolution of such item. If Tenant does not
     deliver the Punch List Items to Landlord within such time period, Tenant
     shall be deemed to have accepted the condition of the Premises.
     Notwithstanding the provisions of this subsection (c), Tenant shall not be
     responsible for any latent defect within the Premises concerning any
     improvements constructed by Landlord, its agents, employees, contractors,
     and/or subcontractors, which could not reasonably been discovered during
     such sixty (60) day period, the correction of which shall be Landlord's
     responsibility.

     ------
5.    RENT 
     ------

     (a)  Tenant agrees to pay to Landlord as "BASE RENT," (annual rent divided
     by twelve (12)), without offset, prior notice or demand, for the Premises,
     on or before the first day of the first full calendar month of the term
     hereof and a like sum on or before the first day of each and every
     successive calendar month thereafter during the term hereof. Base Rent for
     any period during the term hereof which is for less than one (1) month
     shall be a prorated portion of the monthly installment herein, based upon a
     thirty (30)-day month. Said rental shall be paid to Landlord, without
     deduction or offset in lawful money of the United States of America, which
     shall be legal tender at the time of payment at the Office of the Building,
     or to such other person or at such other place as Landlord may from time to
     time designate in writing.

     (b)  The Base Rent during the term of this Lease shall be as follows;
     provided, however, Tenant shall be entitled to Base Rent-free possession of
     the Premises for full calendar month following the Commencement Date;

<TABLE> 
<CAPTION> 
     Term of this Lease                 Annual Base Rent              Monthly Base Rent              
     (from Commencement Date)           (per rentable square foot)    (per rentable square foot)    
     ------------------------           --------------------------    --------------------------    
     <S>                                <C>                           <C>                           
           Year 1                            $16.00                        $1.333                   
           Year 2                            $16.00                        $1.333                   
           Year 3                            $16.00                        $1.333                   
           Year 4                            $16.00                        $1.375                   
           Year 5                            $16.00                        $1.375                    
</TABLE> 

     (c)  Any and all amounts due and payable by Tenant and Landlord pursuant to
     this Lease, including, but not limited to Base Rent, shall be referred to
     as "RENT."

     ------------------
6.    SECURITY DEPOSIT
     ------------------

     [Intentionally Deleted]

     -------------------------------
      OPERATING EXPENSE ADJUSTMENTS
7.   -------------------------------

     (a)  For the purpose of this Lease, "DIRECT EXPENSES" shall mean all direct
     costs of every kind or nature which Landlord shall pay or become obligated
     to pay because of or in connection with management, ownership, maintenance,
     repair, replacement, preservation and operation of the Building and the
     common areas thereof, as determined by standard accounting practices,
     calculated assuming the Building is ninety-five percent (95%) occupied, and
     shall include the following costs by way of illustration, but not to be
     limited to: any and all real property taxes and assessments (collectively,
     "REAL ESTATE TAXES"), rent taxes, gross receipt taxes (whether assessed
     against the Landlord or assessed against the Tenant and collected by the
     Landlord, or both); water and sewer charges; insurance premiums for any
     insurance obtained by Landlord (collectively, "INSURANCE EXPENSE"); any and
     all utilities for the Building (collectively, "UTILITIES EXPENSE");
     janitorial services; labor, costs incurred in the management of the
     building, if any (which shall not exceed four percent (4.00%) of gross
     revenues generated from the Building); air conditioning and heating;
     elevator maintenance; supplies; materials; equipment and tools; including
     maintenance, costs, and upkeep of all parking and common areas (Direct
     Expenses shall not include depreciation on the Building of which the
     Premises are a part or equipment therein; loan

                                      -2-
<PAGE>
 
     payments; executive salaries or real estate brokers' commissions, or cost
     of tenant improvements installed by Landlord; or attorneys' fees incurred
     by Landlord resulting from disputes or lease transactions with existing
     tenants of the Building; provided that attorneys' fees incurred by Landlord
     which are for the general benefit of all tenants of the Building shall be
     included in Direct Expenses).

     (b)  For the first twelve (12) months following the Commencement Date,
     simultaneous with payment of Base Rent, Tenant shall pay its proportionate
     share of such estimated Direct Expenses, as determined by comparing the
     rentable square footage of the Premises to the rentable square footage of
     the Building ("TENANT'S SHARE"), which percentage shall be confirmed in the
     First Amendment to Lease and Acknowledgment. Landlord shall give to Tenant
     on or before the first day of March of each subsequent year ("COMPARISON
     YEAR") a statement ("EXPENSE STATEMENT") of the actual amount of Direct
     Expenses for the previous year, but failure by Landlord to give such
     statement by said date shall not constitute a waiver by Landlord of its
     right to collect any amount payable hereunder. Landlord shall, in each
     Expense Statement, estimate Direct Expenses for the then current year and
     such estimate shall be used as an estimate for calculation of the current
     year's Direct Expenses. Such amount shall be divided into twelve (12) equal
     monthly installments and Tenant shall pay to Landlord, concurrently with
     the regular monthly rent payment next due following the receipt of such
     statement one-twelfth (1/12th) of the estimated Direct Expenses. Subsequent
     installments shall be payable concurrently with the regular monthly rent
     payment for the balance of that calendar year and shall continue until the
     next Expense Statement is rendered. If any Expense Statement establishes
     that Tenant underpaid Tenant's Share of Direct Expenses for the previous
     calendar year, then upon receipt of an Expense Statement from Landlord,
     Tenant shall pay, within thirty (30) days following receipt of such
     statement, a lump sum equal to Tenant's Share of such actual Direct
     Expenses, less the total of the monthly installments of Direct Expenses
     paid in the previous calendar year. If an Expense Statement established
     that Tenant overpaid Tenant's Share of Direct Expenses for the previous
     calendar year, then upon receipt of the Expense Statement such overpayment
     made by Tenant shall be credited towards the next monthly rent falling due
     and the estimated monthly installment of Direct Expenses to be paid shall
     be adjusted to reflect such lower Direct Expenses. Direct Expenses for any
     calendar year in which this Lease commences or terminates shall be
     apportioned based on the number of months or partial months of the term
     included in the calendar year. Variable expenses for less than a fully
     occupied Building shall be "grossed up" assuming a ninety-five percent
     (95%) occupancy. If the rentable square footage of the Building increases
     at any time during the term of this Lease, Tenant's Share shall be reduced
     using the formula set forth in this subsection (b). Landlord estimates that
     the cost of Direct Expenses for the Premises, will be Six and 25/100ths
     dollars ($6.25) per rentable square foot in 1998, however actual expenses
     may vary.

     (c)  For the purpose of determining Tenant's Share for any given Comparison
     Year, Direct Expense (excepting Real Estate Taxes, Insurance Expense and
     Utilities Expense) shall not increase by more than five percent (5.00%) of
     Direct Expenses (excepting Real Estate Taxes, Insurance Expense, and
     Utilities Expense) from the previous Comparison Year. Real Estate Taxes,
     Insurance Expense and Utilities Expense shall not be subject to the above-
     mentioned limitation.

     (d)  Operating Expense Adjustments. Notwithstanding the definition of 
          -----------------------------  
     "DIRECT EXPENSE," such cost shall not include the following expenditures:

          (1)  Real Estate Taxes shall exclude (a) federal, state or local
     income, franchise or estate taxes, and (b) interest and penalties assessed
     by reason of Landlord's failure to pay such real estate taxes when due.
     Landlord agrees, that if any special taxes or assessment shall be levied
     against the Building, to elect to pay such assessment over the longest
     period of time permitted by law.

          (2)  Insurance Expense shall exclude premiums to the extent any
     unusual tenant activity (other than that caused by Tenant) causes
     Landlord's existing insurance premiums to increase or requires Landlord to
     purchase additional insurance, but only to the extent such additional cost
     can be identified by the insurer.

          (3)  Direct Expenses shall exclude:

               (i)    The cost of capital improvements, repairs or replacements
     to the Building except for those that (a) reduce operating expenses of the
     Building, but only to the extent of such cost saving, or (b) are required
     by law; provided, however, such capital improvements, repairs and
     replacements shall be amortized over a reasonable period of time in
     accordance with generally accepted accounting principles;

               (ii)   Payments for rented equipment, the cost of which equipment
     would constitute a capital expenditure if the equipment were purchased;

               (iii)  The cost of correcting defects in the initial construction
     of the Building;

               (iv)   Expenses incurred by Landlord in connection with services
     or other benefits of a type which are not building standard services or
     benefits provided to tenants generally, but which are provided only to
     specific tenants;

               (v)    Any items to the extent such items are reimbursable to
     Landlord by Tenant (other than as Tenant's Share of Direct Expenses), by
     other tenants or occupants of the Building, or by any third parties;

               (vi)   All costs related to the preparation of any portion of the
     Building for occupancy by a tenant or other occupant;

               (vii)  Any cost incurred by the negligent acts or omissions of 
     Landlord, its agents and employees;

               (viii) Advertising and promotional expenses associated with the 
     marketing of vacant space in the Building;

                                      -3-

<PAGE>
 
               (ix) Costs and expenses incurred by Landlord in connection with
     the repair of damage to the Building or Property caused by fire or other
     casualty, insured or required to be insured against hereunder;

               (x)  The cost of any item for which Landlord is reimbursed 
     through condemnation awards; and

               (xi) Costs incurred due to violation by Landlord or any other
     tenant of the Building of any lease or any laws, rules, regulations or
     ordinances applicable to the Building.

     (e)  Even though the term has expired and Tenant has vacated the Premises,
     when the final determination is made of Tenant's share of Direct Expenses
     for the year in which this Lease terminates, Tenant shall, within thirty
     (30) days following such determination, pay any increase due over the
     estimated expenses paid and conversely any overpayment made in the event
     said expenses decrease shall be immediately rebated by Landlord to Tenant.

     (f)  For a period of ninety (90) days after receipt of the Expenses
     Statement, Tenant shall be entitled, upon thirty (30) days prior written
     notice and during normal business hours, at the office of the Building's
     property manager or such other place as Landlord shall designate, to
     inspect and examine those books and records of Landlord relating to the
     determination of Direct Expenses for the immediately preceding Comparison
     Year. Failure of Tenant to request such inspection within such ninety (90)-
     day period shall render such Expenses Statement conclusive and binding on
     Tenant. If, after inspection and examination of such books and records,
     Tenant disputes the amounts of the Direct Expenses charged by Landlord,
     Tenant may, by written notice to Landlord, request an independent audit of
     such books and records. The independent audit of the books and records
     shall be conducted by a certified public accountant ("CPA") acceptable to
     both Landlord and Tenant (the CPA shall be paid on an hourly basis and no
     contingent fee payments shall be permitted). The audit shall be limited to
     the determination of the amount of Direct Expenses for the subject
     Comparison Year. If the audit discloses that the amount of Direct Expenses
     billed to Tenant was incorrect, the appropriate party shall pay to the
     other party the deficiency or overpayment, as applicable. All costs and
     expenses of the audit shall be paid by Tenant unless the audit shows that
     Landlord overstated Direct Expenses for the subject Comparison Year by more
     than five percent (5%), in which case Landlord shall pay all costs and
     expenses of the audit. Tenant and the CPA shall keep any information
     gained from such audit confidential and shall not disclose it to any other
     party. The exercise by Tenant of the audit rights hereunder shall not
     relieve Tenant of its obligation to timely pay all sums due hereunder,
     including, without limitation, the disputed portion of Direct Expenses.

8.  -----
     USE
    -----

     (a)  Tenant shall use the Premises for general office purposes and related
     uses, and shall not use or permit the Premises to be used for any other
     purpose.

     (b)  Except for permissible use of the Premises as set forth in this Lease,
     Tenant shall not do or permit anything to be done in or about the Premises
     nor bring or keep anything therein which will in any way increase the
     existing rate of or affect any fire or other insurance upon the building or
     any of its contents, or cause cancellation of any insurance policy covering
     said Building or any part thereof or any of its contents. Tenant shall not
     do or permit anything to be done in or about the Premises which will in any
     way obstruct or interfere with the rights of other tenants or occupants of
     the Building or injure or annoy them or use or allow the Premises to be
     used for any improper, immoral, unlawful or objectionable purpose, nor
     shall Tenant cause, maintain or permit any nuisance in, on or about the
     Premises. Tenant shall not commit or suffer to be committed any waste in or
     upon the Premises.

     (c)  Neither Tenant, nor any assignee, sublessee or occupier of any portion
     of the Premises, shall permit the introduction, placement, use, generation,
     manufacture, storage, disposal or transportation in or around the Premises
     of any hazardous, poisonous or toxic substance, material or waste of any
     kind that may be hazardous to health and/or the environment, including,
     without limitation, substances from time to time identified as such by
     federal and/or state laws and regulations, without the prior written
     consent of Landlord; provided, however, Tenant shall be entitled to possess
     and maintain within the Premises reasonable amounts of such hazardous
     materials which are customarily used in connection with general office
     uses.

9.  ---------------------
     COMPLIANCE WITH LAW
    ---------------------

     Tenant shall, at its sole cost and expense, promptly comply with all laws,
     statutes, ordinances and governmental rules, regulations or requirements
     now in force or which may hereafter be in force, which includes, but is not
     limited to access laws for individuals with disabilities (commonly referred
     to as "ADA"), and with the requirements of any board of fire insurance
     underwriters or other similar bodies now or hereafter constituted, relating
     to, or affecting the condition, use or occupancy of the Premises, excluding
     structural changes of general application to office space and specifically
     not related to or affected by Tenant's improvements or acts. In the event
     additions, alterations or other accommodations to the Premises, the
     Building, or any other property owned by Landlord are required as a result
     of Tenant's specific occupancy or actions, Tenant shall be solely
     responsible for and shall indemnify, defend and hold harmless Landlord, its
     successors and assigns, for, from and against any loss, damage, cost,
     claim, expense, or liability directly or indirectly arising out or
     attributable to such occupancy or action. Notwithstanding the foregoing,
     Landlord, following the Commencement Date, shall be responsible for
     compliance with all laws, statutes, ordinances and governmental rules,
     regulations or requirements affecting the Building to the extent that such
     compliance is required for general office use and not related to Tenant's
     specific use of the Premises. The judgment of any court of competent
     jurisdiction or the admission of Tenant in any action against Tenant,
     whether Landlord be a party thereto or not, that Tenant has violated any
     law, statute, ordinance or governmental rule, regulation or requirement,
     shall be conclusive of the fact as between the Landlord and Tenant.

                                      -4-

<PAGE>
 
     ---------------------------
10.   ALTERATIONS AND ADDITIONS
     ---------------------------

      Tenant shall not make or suffer to be made any alterations, additions or
      improvements to or of the Premises or any part thereof without the written
      consent of Landlord, which shall not be unreasonably withheld or delayed.
      Notwithstanding the foregoing, Tenant shall be entitled to make non-
      structural alterations, additions and improvements, which do not effect
      the electrical or mechanical systems of the Building, to the Premises
      having a value of less than Twenty-Five Thousand and No/100ths Dollars
      ($25,000.00) ("MINOR ALTERATIONS") without Landlord's consent, but with
      not less than ten (10) days prior written notice. Landlord shall approve
      or disapprove any request for alterations, additions or improvements to
      the Premises made by Tenant within fifteen (15) days of its receipt of
      Tenant's request accompanied by the plans and specifications for the
      proposed alterations, additions or improvements. If Landlord disapproves
      the request, Landlord shall provide Tenant with a written explanation of
      the reasons for the denial. If Landlord fails to respond to Tenant's
      request within the fifteen (15)-day period specified in this Section 10,
      Landlord will be deemed to have approved the alterations, additions or
      improvements. Any alterations, additions or improvements to or of said
      Premises, including, but not limited to, wall covering, paneling and 
      build-in cabinet work, but excepting movable furniture and trade fixtures,
      shall on the expiration of the term become a part of the realty and belong
      to the Landlord and shall be surrendered with the Premises. In the event
      Landlord consents to the making of any alterations, additions or
      improvements to the Premises by Tenant, the same shall be made by Tenant
      at Tenant's sole cost and expense, and any contractor or person selected
      by Tenant to make the same must first be approved of in writing by the
      Landlord. Tenant shall not be required to remove any improvements shown on
      the Tenant Working Drawings (as defined in the Work Letter Agreement) or
      improvements made to the Premises by Tenant with the Refurbishment
      Allowance. In the event Tenant seeks to make other alterations, additions
      or improvements to the Premises (in addition to those described in the
      preceding sentence) and Landlord, at the time it grants its approval for
      such alterations, additions or improvements, indicates in writing that all
      or a portion of such improvements must be removed by Tenant upon the
      expiration or sooner termination of the Lease, Tenant shall remove such
      improvements at its sole cost and expense upon the expiration or earlier
      termination of this Lease and shall, forthwith and with all due diligence
      at its sole cost and expense, repair any damage to the Premises caused by
      such removal. Any and all alterations, additions and improvements shall
      comply with applicable law, statutes and ordinances. Subject to the
      procedure set forth in this Section 10, Landlord shall not unreasonably
      disapprove any request of Tenant to install within the Building stairwell
      leading to the second floor a security access card reader.

     ---------
11.   REPAIRS
     ---------

      (a)  Tenant shall, when and if needed or whenever requested by Landlord to
      do so, at Tenant's sole cost and expense, maintain and make all repairs to
      the Premises and every part thereof, including all interior windows and
      doors, but excluding all Landlord Services (as defined below), to keep,
      maintain and preserve the Premises in good condition and repair. Tenant
      shall upon the expiration or sooner termination of the term hereof
      surrender the Premises to Landlord in the same condition as when received,
      less reasonable wear and tear and subject to any damages which are not the
      obligation of Tenant to repair pursuant to the provisions of this Lease.
      Tenant acknowledges that Landlord shall have no obligation to maintain,
      repair or replace any telecommunications or computer cabling or wiring
      which is located in the Premises or which exclusively serves the Premises
      (collectively, "CABLING"). Tenant shall, at Tenant's expense, contract
      with reputable contractor to maintain the Cabling. Landlord shall have no
      obligation to alter, remodel, improve, repair, decorate or paint the
      Premises or any part thereof and the parties hereto affirm that Landlord
      has made no representations to Tenant respecting the condition of the
      Premises or the Building, except as specifically herein set forth. Tenant
      shall not commit or allow any waste or damage to be committed in any
      portion of the Premises or Building.

      (b)  Notwithstanding Subparagraph 11(a) above, Landlord shall repair and
      maintain in good condition the structural portions of the Building,
      including the roof, foundation, floor slab, basic plumbing, heating,
      ventilating, air conditioning, exterior windows, exterior walls of the
      Building, exterior doors to the Building, all plumbing in bathrooms,
      landscaping of the common areas of the Building, the parking facilities of
      the Building, and electrical systems installed or furnished by Landlord
      (collectively, "LANDLORD REPAIRS"), unless such maintenance and repairs
      are caused in part or in whole by the act, neglect, fault of or omission
      of any duty by Tenant, its agents, servants, employees or invitees, in
      which case Tenant shall pay to Landlord, as additional rent, the
      reasonable cost of such maintenance and repairs. Landlord shall not be
      liable for any such failure to make any such repairs or to perform any
      maintenance, unless such failure shall persist for an unreasonable time
      after written notice of the need of such repairs or maintenance is given
      to Landlord by Tenant. Following Landlord's receipt of written notice from
      Tenant that a repair contemplated by this Section is required, Landlord
      shall use its reasonable efforts to complete such repair in a timely basis
      as soon as possible. Except as provided in paragraph 22 hereof, there
      shall be no abatement of rent and no liability of Landlord by reason of
      any injury to or interference with Tenant's business arising from the
      making of any repairs, alterations or improvements in or to any portion of
      the Building or the Premises or in or to fixtures, appurtenances and
      equipment therein. Tenant waives the right to make repairs at Landlord's
      expense under any law, statute or ordinance now or hereafter in effect.

      (c)  Notwithstanding anything to the contrary contained in subparagraphs
      (a) and (b) of this paragraph 11, Tenant shall maintain and repair, at its
      sole cost and expense, all non-base Building facilities exclusively
      serving the Premises, if any, including kitchen facilities and heating and
      air conditioning systems, and all plumbing connected to said facilities or
      systems, installed by Tenant or on behalf of Tenant or existing in the
      Premises at the time of delivery of possession of the Premises to Tenant
      by Landlord. The provisions of this paragraph shall not apply to the basic
      heating and air conditioning system provided by Landlord to all tenants of
      the Building.

      (d)  Notwithstanding any other provisions of this Lease to the contrary,
      upon receipt of written notice (the "FIRST REPAIR NOTICE") from Tenant
      that Landlord Repairs are required. Landlord shall cause such repair to be
      made within a reasonable period of time given the circumstances but in no
      event later than thirty (30) days after it receives the First Repair
      Notice; provided, however, that if the repair is of such a nature that it
      cannot be completed within thirty (30) days, then such longer time as
      reasonably necessary. If Landlord fails to make the repair within the said
      time period, Tenant may give an additional notice (the

                                      -5-

<PAGE>
 
     "SECOND REPAIR NOTICE") to Landlord. If Landlord fails to commence
     thereafter such repair with five (5) days after receipt of the Second
     Repair Notice and thereafter diligently pursues said repair to completion,
     Tenant may perform such repair. All repairs performed by Tenant pursuant to
     this Section shall be made by a qualified licensed contractor(s) with
     sufficient expertise in such matters and in accordance with all applicable
     laws, statutes and ordinances. Landlord shall reimburse Tenant for Tenant's
     actual costs incurred within ten (10) days after Landlord's receipt of a
     written demand from Tenant, which demand shall include supporting invoices.
     If Landlord disputes the need for such repair, Landlord shall deliver
     written notice of such disagreement to Tenant within ten (10) days after
     its receipt of the First Repair Notice. Notwithstanding such dispute,
     Tenant may cause such repair to be completed pending resolution of such
     dispute. The dispute shall be resolved by a mutually acceptance third party
     engineer, which determination shall be binding upon Landlord and Tenant;
     provided, however, that if the parties cannot agree on an engineer, then
     the dispute shall be resolved by arbitration pursuant to the commercial
     arbitration rules then in effect for the American Arbitration Association
     ("ARBITRATION"). The losing party shall pay the costs of the engineer or
     arbitrator, whichever is applicable. If Landlord is obligated to reimburse
     Tenant for the actual cost of repair and fails to do so as provided in this
     Section, such amount shall accrue interest at the rate of fifteen percent
     (15.00%) per annum until paid in full.

     (e)  Landlord acknowledges that certain of the Landlord Repairs may have to
     be made on an expedited basis due to a material disruption of Tenant's
     business operations caused by such condition, which condition shall be
     referred to as an "EMERGENCY CONDITION." In this regard, in the event an
     Emergency Condition relating to a Landlord Repair exists, Tenant shall
     deliver to Landlord, by facsimile, a written notice ("EMERGENCY NOTICE")
     describing such Emergency Condition. The Emergency Notice shall, in ten
     (10) point bold typed across the top, stating "AN EMERGENCY SITUATION
     EXISTS AT THE PREMISES REQUIRING YOUR IMMEDIATE ATTENTION." In the event
     that Landlord fails to commence repair of the Emergency Condition within
     forty-eight (48) hours (if such situation occurs during non-business hours,
     Tenant shall utilize Landlord's paging system, the procedure for which
     shall be provided to Tenant prior to the Commencement Date), Tenant, using
     licensed contractors which are qualified to perform such tasks in
     compliance with applicable laws, shall have the right to make the Landlord
     Repairs; provided, however, such repairs shall be limited to the temporary
     remediation of such Emergency Condition and Landlord shall thereafter be
     responsible for the full repair of such condition. Landlord shall reimburse
     Tenant's actual expenses incurred in making such temporary remediation
     repairs within fifteen (15) days following Landlord's receipt of written
     demand and supporting invoices. If such repayment is not made within such
     fifteen (15) day period, such amount shall accrue interest at the rate of
     fifteen percent (15.00%) per annum until paid in full.

     -------
12.   LIENS
     -------
     
     Tenant will not cause or permit any lien to be imposed upon the Premises of
     the Building and will pay all taxes and license fees imposed by reason of
     any improvements made by Tenant to the Premises or imposed upon any
     personal property located in the Premises. Tenant agrees to give Landlord
     not less than five (5) days notice prior to commencement of any alteration
     or repair permitted under the terms of the Lease so that Landlord may post
     a notice of non-responsibility. In the event that the amount of the
     estimated cost of any improvements, additions or alterations in the
     Premises is in excess of Twenty-Five Thousand and No/100ths Dollars
     ($25,000.00), Landlord may require, at Tenant's sole cost and expense, a
     lien and completion bond in an amount equal to one and one-half (1-1/2)
     times all estimated cost of any improvements, additions or alterations in
     the Premises, to insure Landlord against any liability for mechanics' and
     materialmen's liens and to insure completion of the work.

     ---------------------------
13.   ASSIGNMENT AND SUBLETTING
     ---------------------------

     (a)  Tenant shall not, without the prior written consent of Landlord, which
     shall not be unreasonably withheld as provided in this Section 13: (a)
     assign, mortgage, pledge, encumber or otherwise transfer this Lease, the
     term or estate hereby granted, or any interest hereunder; or (b) permit the
     Premises or any part thereof to be utilized by anyone other than Tenant
     (whether as concessionaire, franchisee, licensee, permittee or otherwise).
     Any assignment, mortgage, pledge, encumbrance, transfer or sublease without
     Landlord's consent shall be voidable and, at Landlord's election, shall
     constitute a default. Notwithstanding the foregoing and Subsection (b)
     below, Tenant may assign this Lease or sublet the Premises or a portion
     thereof, without Landlord's consent, but with prior written notice, to any
     corporation, partnership, individual or other entity which controls, is
     controlled by or is under common control with Tenant; or to any
     corporation, partnership, individual or other entity, resulting from the
     merger or consolidation with Tenant; or to any person or entity which
     acquires all of the assets of Tenant's business going concern, provided
     that (i) the assignee or subtenant assumes, in full, the obligations of
     Tenant under this Lease, (ii) Tenant remains fully remains liable under
     this Lease, (iii) the use of the Premises remains unchanged, and (iv) the
     assignee has a net worth which is not less than Tenant's as of the Lease
     Date. Provided that Tenant is a corporation, and (i) the stock of Tenant is
     traded on a national exchange, the transfer of stock in Tenant shall not be
     considered an assignment, sublease or transfer under the Lease, or (ii) the
     stock of Tenant is not traded on a national exchange, the collective
     transfer of thirty percent (30.00%) or less of such stock shall not be
     considered an assignment, sublease or transfer under this Lease.

     (b)  If at any time or from time to time during the Term of this Lease,
     Tenant desires to assign this Lease with respect to, or to sublet, all or
     any part of the Premises, then at least thirty (30) days prior to the date
     when Tenant desires the assignment or subletting to be effective (the
     "TRANSFER DATE"), Tenant shall give Landlord a notice (the "TRANSFER
     NOTICE") which shall set forth the name, address and business of the
     proposed assignee or subtenant, information (including financial statements
     and references) concerning the character of the proposed assignee or
     subtenant, in the case of a proposed sublease, a detailed description of
     the space proposed to be sublet, which must be a single, self-contained
     unit (the "SPACE"), any rights of the proposed assignee or subtenant to use
     Tenant's improvements and the like, the Transfer Date, and the fixed rent
     and/or other consideration and all other material terms and conditions of
     the proposed assignment or subletting, all in such detail as Landlord may
     reasonably require, if Landlord promptly requests additional detail, the
     Transfer Notice shall not be deemed to have received until Landlord
     receives such additional detail.

                                      -6-
<PAGE>
 
(c)  Landlord shall be permitted to consider any reasonable factor in 
determining whether or not to withhold its consent to a proposed assignment or 
sublease and Landlord shall make such determination within thirty (30) days 
following Landlord's receipt of the Transfer Notice. The failure of Landlord to 
deliver written notice of such determination within such time period shall be 
deemed Landlord's disapproval thereof. Without limiting the other instances in 
which it may be reasonable for Landlord to withhold its consent to an assignment
or sublease, it shall be reasonable for Landlord to withhold its consent if any 
of the following conditions are not satisfied:

     (1)  The proposed transferee shall have a net worth which is not less than 
Tenant's as of the Lease Date (the provisions of this Section 13(c)(1) shall not
be applicable to subleases of less than a total maximum of ten thousand (10,000)
rentable square feet of the Premises: provided that such sublessee(s) shall 
nevertheless be subject to Landlord's then existing financial requirements for 
the leasing of any space within the Building);

     (2)  The proposed use by the transferee shall (i) comply with Tenant's 
permitted use, (ii) be consistent with the general character of businesses 
carried on by tenants of a first-class office building, (iii) not increase the 
likelihood of damage or destruction, (iv) unless agreed to be paid by such 
proposed transferee, not be likely to cause an increase in insurance premiums 
for insurance policies applicable to the Building, (v) not require new tenant 
improvements incompatible with then-existing Building systems and components, 
(vi) unless paid by Tenant, not require Landlord to make modifications to the 
Building outside of the Premises (in order, for example, to comply with laws 
such as the ADA), (vii) unless agreed to be paid by such proposed transferee, 
not increase the electrical or HVAC usage in the Premises, and (viii) not 
otherwise have or cause a material adverse impact on the Premises, the Building,
the Project, or Landlord's interest therein;

     (3)  The proposed transferee shall not be a labor union;

     (4)  If Landlord has vacant space at the Building suitable for such 
proposed transferee, the proposed transferee shall not be an existing tenant or 
occupant of the Building or a person or entity with whom Landlord is then 
dealing, or with whom Landlord has had any dealings within the previous four (4)
months, with respect to the leasing of space in the Building;

     (5)  Any ground lessor or mortgagee whose consent to such tranfer is 
required fails to consent thereto; and

     (6)  Any proposed subletting shall not result in more than four (4) 
subleases of portions of the Premises being in effect at any one time during the
Term. Tenant shall have the burden of demonstrating that each of the foregoing 
conditions has been satisfied.

(d)  Provided Landlord has consented to such assignment or subletting, Tenant 
shall be entitled to enter into such Assignment or Sublease with the third party
identified in the Transfer Notice subject to the following conditions:

     (1)  At the time of the transfer, no event of default under this Lease, or 
under any other lease between Tenant and Landlord or any affiliate of Landlord, 
shall have occurred and be continuing;

     (2)  The assignment or sublease shall be on substantially the same terms
set forth in the Transfer Notice given to Landlord;

     (3)  No assignment or sublease shall be valid and no assignee or sublessee 
shall take possession until an executed counterpart of the assignment or 
sublease has been delivered to Landlord;

     (4)  No assignee or sublessee shall have a right further to assign or 
sublet without Landlord's and Tenant's consent thereto in each instance, which 
consent in the case of a future assignment should not be unreasonably withheld;

     (5)  Any assignee shall have assumed in writing the obligations of Tenant 
under this Lease;

     (6)  Any subtenant shall have agreed in writing to comply with all 
applicable terms and conditions of this Lease with respect to the Space;

     (7)  In the event Tenant sublets the entire Premises or any part thereof,
Tenant shall deliver to Landlord fifty percent (50.00%) of any excess rent 
within thirty (30) days of Tenant's receipt thereof pursuant to such subletting.
As used herein, "EXCESS RENT" shall mean any sums or economic consideration per 
square foot of the Premises received by Tenant pursuant to such subletting in 
excess of the amount of the rent per square foot of the Premises payable by 
Tenant under this Lease applicable to the part or parts of the Premises so 
sublet; provided, however, that no excess payment shall be payable until Tenant 
shall have recovered therefrom all of the costs incurred by Tenant for brokerage
commissions, tenant improvement work approved by Landlord, reasonable attorneys 
fees, and reasonable marketing fees, in conjunction with such sublease; and

     (8)  In the event Tenant assigns this Lease, Tenant shall deliver to 
Landlord fifty percent (50.00%) of any excess payment within thirty (30) days of
Tenant's receipt thereof pursuant to such assignment. As used herein, "EXCESS 
PAYMENT" shall mean the amount of payment received for such assignment of this 
Lease in excess of the rent payable by Tenant under this Lease; provided, 
however, that no excess payment shall be payable until Tenant shall have 
recovered therefrom all of the costs incurred by Tenant for brokerage 
commissions, tenant improvement work approved by Landlord, reasonable attorneys 
fees, and reasonable marketing fees, in conjunction with such assignment.

(e)  No subletting or assignment shall release Tenant of Tenant's obligations 
under this Lease or alter the liability of Tenant to pay the rent and to perform
all other obligations to be performed by Tenant hereunder. The acceptance of 
rent by Landlord from any other person shall not be deemed to be a waiver by 
Landlord of any provision hereof. Consent to one assignment or subletting shall 
not be deemed

                                      -7-

<PAGE>
 
     consent to any subsequent assignment or subletting. In the event of default
     by an assignee or subtenant of Tenant or any successor of Tenant in the
     performance of any of the terms hereof, Landlord may proceed directly
     against Tenant without the necessity of exhausting remedies against such
     assignee, subtenant or successor. Landlord may consent to subsequent
     assignments of the Lease or sublettings or amendments or modifications to
     the Lease with assignees of Tenant; provided, however, Landlord shall
     deliver prior written notice of such proposed assignment or sublease to
     Tenant, or any successor of Tenant, and any such actions shall not relieve
     Tenant of liability under this Lease.

     (f) If Tenant assigns the Lease or sublets the Premises or requests the
     consent of Landlord to any assignment or subletting or if Tenant requests
     the consent of Landlord for any act that Tenant proposes to do, then Tenant
     shall, upon demand, pay Landlord an administrative fee of Seven Hundred
     Fifty and No/100ths Dollars ($750.00) for attorneys' fees reasonably
     incurred by Landlord in connection with such act or request.

14.  ---------------
      HOLD HARMLESS
     ---------------

     Tenant shall indemnify, defend, protect and hold Landlord any partner, co-
     venturer, co-tenant, officer, director employee, agent or representative of
     Landlord (collectively, "AFFILIATES") and the Project harmless against and
     from all claims, damages and liabilities, arising from Tenant's use of the
     Premises or the conduct of Tenant's business or from any activity, work, or
     other thing done, permitted or suffered by Tenant in or about the Building,
     and shall further indemnify and hold Landlord, any partner, co-venturer,
     co-tenant, officer, director, employee, agent, or representative of
     Landlord and the Project harmless against and from any and all claims,
     damages and liabilities, directly arising from any breach or default in the
     performance of any obligation on Tenant's part to be performed under the
     terms of this Lease, or arising from any act or negligence of the Tenant or
     any officer, agent, employee, guest or invitee of Tenant, and from all and
     against all costs attorneys' fees, expenses, and liabilities incurred in or
     about any such claim or any action or proceeding brought thereon, and, in
     any case, action, or proceeding brought against Landlord by reason of any
     such claim. Tenant as a material part of the consideration to Landlord
     under this Lease, hereby assumes all risk of damage to property or injury
     to persons in, upon or about the Premises, except that Tenant shall not
     assume any risk for damage nor indemnify or hold harmless Landlord or
     Landlord's Affiliates from any claims, damages, liabilities, costs or
     expenses, resulting from the gross negligence or willful misconduct of
     Landlord or its authorized representatives.

     Landlord shall not be liable to Tenant and Tenant hereby waives all claims
     against Landlord or its Affiliates for any injury or damage to any person
     or property occurring or incurred in connection with or in any way relating
     to the Premises, the Building or the Property from any cause, unless caused
     by the gross negligence or willful misconduct of Landlord, its agents,
     employees, contractors and/or subcontractors. Without limiting the
     foregoing, neither Landlord nor any of its Affiliates shall be liable for
     and there shall be no abatement of rent for (i) any damage to Tenant's
     property stored with or entrusted to Affiliates of Landlord, (ii) loss of
     or damage to any property by theft or any other wrongful or illegal act, or
     (iii) an injury or damage to persons or property resulting from fire,
     explosion, falling plaster, steam, gas, electricity, water or rain which
     may leak from any part of the Building or the Project or from the pipes,
     appliances, appurtenances or plumbing works therein or from the roof,
     street or sub-surface or from any other place or resulting from dampness or
     any other cause whatsoever of from the acts or omissions of other tenants,
     occupants or other visitors to the Building or the Project or from any
     other cause whatsoever, or (iv) any diminution or shutting off of light,
     air or view by any structure which may be erected on lands adjacent to the
     Building, whether within or outside of the Property. Tenant agrees that in
     no case shall Landlord ever be responsible or liable on any theory for any
     injury to Tenant's business, loss of profits, loss income or any other form
     of consequential damage. Tenant shall give prompt notice to Landlord in the
     event of (a) the occurrence of a fire or accident in the Premises or in the
     Building, or (b) the discovery of any defect therein or in the fixtures or
     equipment thereof. Notwithstanding any other provision of this Lease to the
     contrary, Tenant waives any claims based on damage or injury resulting from
     Landlord's failure to police or provide security for the property.

15.  -------------
      SUBROGATION
     -------------

     Landlord and Tenant hereby mutually waive their respective rights of
     recovery against each other for any loss or damage that is or would be
     insured by fire, extended coverage and other property insurance policies
     existing for the benefits of the respective parties or required to be
     obtained by the releasing party pursuant to the provisions of the Lease.
     Each party shall obtain any special endorsements, if required by their
     insurer to evidence compliance with the aforementioned waiver.

16.  ---------------------
      LIABILITY INSURANCE
     ---------------------

     Tenant shall, at Tenant's expense, obtain and keep in force, during the
     term of this Lease, a policy of commercial general liability insurance
     (including, without limitation, contractual liability coverage) insuring
     Tenant against any liability arising out of the ownership, use, occupancy
     or maintenance of the Premises and all areas appurtenant thereto. Such
     policy should provide coverage in minimum amounts of One Million and
     No/100ths Dollars ($1,000,000.00) for any one (1) occurrence, and a Three
     Million and No/100ths Dollars ($3,000,000.00) combined annual aggregate per
     location with respect to bodily injury and property damage liability
     coverage, combined single limits for this location only. The limit of said
     insurance shall not, however, limit the liability of the Tenant hereunder.
     Tenant may carry said insurance under a blanket policy, providing; however
     said insurance by Tenant shall have a Landlord's protective endorsement
     attached thereto. If Tenant shall fail to procure and maintain said
     insurance, Landlord may, but shall not be required to, procure and maintain
     same, but at the expense of Tenant. Insurance required hereunder shall be
     in companies rated A/V or better in "Best Insurance Guide" and licensed in
     the State of Colorado. Tenant shall deliver to Landlord, prior to
     occupancy of the Premises, copy of the policy of liability insurance
     required herein or a certificate evidencing the existence and amounts of
     such insurance, naming Landlord and any other party indicated by Landlord
     as an additional insured thereunder. No policy shall be cancelable or
     subject to reduction of coverage, except after thirty (30) days prior
     written notice to Landlord. During the term of this Lease, Landlord shall
     maintain an equivalent level of commercial general liability insurance. Any
     liability insurance carried or to be carried by Tenant hereunder shall be
     primary over any liability insurance that is carried by Landlord.

                                      -8-
<PAGE>
 
     Landlord shall carry at all times during the term of the Lease with respect
     to the Building, insurance against loss or damage from fire and other
     casualties ordinarily included in a standard extended coverage of "all
     risks" endorsement. Such insurance shall be in an amount equal to at least
     the replacement value of said property, issued by companies qualified to do
     business in the State of Colorado.

17.  ------------------------
      SERVICES AND UTILITIES
     ------------------------

     Provided that Tenant is not in default beyond any applicable cure periods
     hereunder, Landlord agrees to furnish to the Premises during reasonable
     hours of generally recognized business days which are 7:00 a.m. until 10:00
     p.m., Monday through Friday, excepting state recognized holidays, and 7:00
     a.m. until 7:00 p.m on Saturdays (collectively "BUSINESS HOURS"), subject
     to the rules and regulations of the Building of which the Premises are a
     part, electricity for normal lighting and fractional horsepower office
     machines, heat and air conditioning required in Landlord's reasonable
     judgment for the comfortable use and occupation of the Premises and
     janitorial service, which services shall be consistent with the level of
     services reasonably maintained by landlords of similar buildings in the
     vicinity of the Building, given the terms and conditions of this Lease
     (collectively, "LANDLORD SERVICES"). Subject to the preceding sentence,
     Tenant shall be entitled to access to the Premises twenty four (24) hours a
     day, seven (7) days a week. Landlord shall also maintain and keep lighted
     the common stairs, common entries and toilet rooms in the Building of which
     the Premises are a part. Landlord shall not be liable for, and Tenant shall
     not be entitled to, any reduction of rental by reason of Landlord's failure
     to furnish any of the foregoing when such failure is caused by accident,
     breakage, repairs, strikes, lockouts or other labor disturbances or labor
     disputes of any character, or by any other cause similar or dissimilar,
     beyond the reasonable control of Landlord. Landlord shall not be liable
     under any circumstances for a loss of or injury to property; person or
     Tenant's business occurring through or in connection with or incidental to
     failure to furnish any of the foregoing. Wherever heat generating machines
     or equipment are used in the Premises which affect the temperature
     otherwise maintained by the air conditioning system. Landlord reserves the
     right to install supplementary air conditioning units in the Premises and
     the cost thereof, including the cost of installation, and the cost of
     operation and maintenance thereof, shall be paid by Tenant to Landlord upon
     demand by Landlord.

     Tenant will not, without written consent of Landlord, use any apparatus or
     device in the Premises, including, but without limitation thereto,
     electronic data processing machines, punch card machines and machines using
     in excess of 120 volts, which will in any way increase the amount of
     electricity usually furnished or supplied for the use of the Premises as
     general office space; nor connect with electric current except through
     existing electrical outlets in the Premises, any apparatus or device for
     the purpose of using electric current.

     Tenant acknowledges and agrees that Tenant's use of the Premises during 
     non-Business Hours imposes additional burden on the Building's janitorial
     services, florescent lights, HVAC and electrical systems. Accordingly, non-
     Business Hours use of services will be made available to Tenant through an
     access override switch accessible to Tenant for the Premises and will be
     billed as an after hour rent assessment. After hours use will be metered
     and such cost will be payable upon demand. Such billed amount shall be
     equal to the total costs incurred by Landlord for such services, which
     includes, administrative costs and increased maintenance/replacement cost;
     provided, however, in no event shall Landlord be paid a profit relating to
     such expenditure.

     In the event heating, air conditioning, water, electrical or other utility
     service to the Premises (collectively "UTILITIES") is interrupted for a
     period of six (6) consecutive business days or longer, and as a result
     thereof Tenant does not use the Premises, (i) if such interruption was
     caused by the negligence or willful misconduct of Landlord, its agents,
     employees, contractors or subcontractors. Based Rent payable by Tenant
     pursuant to the Lease shall abate retroactive to the date of the
     interruption and continue until service is repaired, or (ii) if such
     interruption was caused by an event beyond the reasonable control of
     Landlord and such event is covered and funded by business/rental insurance
     maintained by Landlord, if any, Base Rent shall be abated retroactive to
     the date of the interruption and control until service is repaired;
     provided, however, such abatement shall not be in excess of insurance
     proceeds paid to Landlord. Notwithstanding the foregoing, if such
     interruption in Utilities was caused by Tenant, its agents, employees,
     contractors and/or subcontractors, there shall be no abatement of Base
     Rent.

     ----------------
18.   PROPERTY TAXES
     ----------------

     Tenant shall pay all taxes and assessments against any personal property
     trade fixtures, or other improvements on the Premises belonging to Tenant.
     Tenant shall also pay any sales, use or rental tax related to Tenant's
     property or business which may be assessed by any governmental body during
     the term of this LeaseTenant shall pay such taxes and assessments billed
     separately to Tenant prior to delinquency. In the event such taxes and
     assessments are billed to Landlord, Tenant shall pay to Landlord its share
     of same within thirty (30) days after delivery to Tenant by Landlord of a
     statement in writing, setting forth the amount of such taxes or assessments
     applicable to Tenant's property. Tenant shall have the right to dispute
     such taxes with the taxing authorities provided that adequate assurances,
     as reasonably determined by Landlord, to pay such amount are made by
     Tenant.
     
     -----------------------
19.   RULES AND REGULATIONS
     -----------------------

     Tenant shall faithfully observe and comply with the rules and regulations 
     of uniform application that Landlord shall from time to time promulgate.
     Landlord reserves the right from time to time to make all reasonable
     modifications to said rules. The additions and modifications to those rules
     shall be binding upon tenant upon delivery of a copy of them to Tenant.
     Landlord shall not be responsible to Tenant for the nonperformance of any
     said rules by any other tenants or occupants. Landlord is not obligated to
     provide security services to the Premises; provided, however, if such
     services are deemed prudent by Landlord, at any time during the Term, the
     expense for such services, notwithstanding any other provision of this
     Lease to the contrary, shall be included within Direct Expenses.

                                      -9-

<PAGE>
 
     --------------
20.   HOLDING OVER
     --------------

      If Tenant remains in possession of the Premises or any part thereof after
      expiration of the term hereof, without the expressed written consent of
      Landlord, such occupancy shall be a tenancy from month-to-month at a
      rental in the amount of one hundred fifty percent (150%) multiplied by the
      last monthly rental, plus all other charges payable hereunder, and upon
      all the terms hereof applicable to a month-to-month tenancy.

     -------------------
21.   ENTRY BY LANDLORD
     -------------------

      Landlord shall at any and all reasonable times, upon reasonable prior
      notice to Tenant (except in the case of an emergency), have the right to
      enter the Premises, inspect the same, supply janitorial service and any
      other service to be provided by Landlord to Tenant hereunder, to submit
      said Premises to prospective purchasers or tenants (no sooner than nine
      (9) months prior to the expiration date of the term of this Lease), to
      post notices of non-responsibility, and to improve or repair the Premises
      and any portion of the Building of which the Premises are a part that
      Landlord may deem necessary or desirable, without abatement of rent and
      may for that purpose erect scaffolding and other necessary structures
      where reasonably required by the character of the work to be performed,
      always providing that the entrance to the Premises shall not be blocked
      thereby, and further providing that the business of the Tenant shall not
      be interfered with unreasonably. Tenant hereby waives any claim for
      damages or for any injury or inconvenience to or interference with
      Tenant's business, any loss of occupancy or quiet enjoyment of the
      Premises, and any other loss occasioned thereby, provided that Landlord's
      activities have been reasonable. For each of the aforesaid purposes,
      Landlord shall at all times have and retain a key with which to unlock all
      of the doors in, upon and about the Premises, excluding Tenant's vaults,
      safes and files, and Landlord shall have the right to use any and all
      means which Landlord may deem proper to open said doors in an emergency,
      in order to obtain entry to the Premises without liability to Tenant,
      except for any failure to exercise due care for Tenant's property. Any
      entry to the Premises obtained by Landlord by any of said means, or
      otherwise shall not under any circumstances be construed or deemed to be a
      forcible or unlawful entry into, or a detainer of the Premises, or an
      eviction of Tenant from the Premises or any portion therof.

     ----------------
22.   RECONSTRUCTION
     ----------------

      In the event the Premises or the Building of which the Premises are a part
      are damaged by fire or other perils covered by extended coverage
      insurance, Landlord agrees to forthwith repair the same; and this Lease
      shall remain in full force and effect, except that Tenant shall be
      entitled to a proportionate reduction of the rent while such repairs are
      being made, such proportionate reduction to be based upon the extent to
      which the making of such repairs shall materially interfere with the
      business carried on by the Tenant in the Premises which is not mitigated
      by any business interruption insurance carried by Tenant. If the damage is
      due to the fault or neglect of Tenant or its employees, there shall be no
      abatement of rent.

      In the event the Premises or the Building are a part are damaged by fire
      or other perils not covered by extended coverage insurance, then Landlord
      shall forthwith repair the same, provided the extent of the destruction be
      less than ten percent (10%) of the then full replacement cost of the
      Premises or the Building of which the Premises are a part. In the event
      the destruction of the Premises or the Building is to an extent greater
      than ten percent (10%) of the full replacement cost, the Landlord shall
      have the option: (1) to repair or restore such damage, this Lease
      continuing in full force and effect, but the rent to be propotionately
      reduced as hereinabove in this Article provided; or (2) give notice to
      Tenant at any time within sixty (60) days after such damage terminating
      this Lease as of the date specified in such notice, which date shall be no
      less than thirty (30) days and no more than sixty (60) days after the
      giving of such notice. In the event of giving such notice, this
      Lease shall expire and all interest of the Tenant in the Premises shall
      terminate on the date so specified in such notice and the rent,
      reduced by a proportionate amount based upon the extent, if any, to which
      such damage materially interfered with the business carried on by the
      Tenant in the Premises, shall be paid up to date of said such termination.

      Notwithstanding anything to the contrary contained in this Article,
      Landlord shall not have any obligation whatsoever to repair, reconstruct
      or restore the Premises when the damage, in excess of fifteen percent
      (15%) of the replacement cost of the Building, resulting from any casualty
      covered under this Article occurs during the last twelve (12) months of
      the term of this Lease or any extension thereof. If Landlord elects not to
      repair, reconstruct or restore the Premises during such twelve (12) month
      period, this Lease shall be deemed terminated on the date of such damage.

      Landlord shall not be required to repair any damage caused by fire or
      other cause, or to make any repairs or replacements of any panels,
      decoration, office fixtures, railings, floor covering, partitions, or any
      other property installed in the Premises by Tenant.

      The Tenant shall not be entitled to any compensation or damages from
      Landlord for loss of the use of the whole or any part of the Premises,
      Tenant's personal property or any inconvenience or annoyance occasioned by
      such damage, repair, reconstruction or restoration.

      Notwithstanding anything contained in this Section 22 to the contrary, in
      the event of a fire or other casualty that renders the Premises (or a
      portion thereof) inaccessible or unusable, in Tenant's and Landlord's
      reasonable judgment, for the Tenant's purposes, provided such damage was
      not caused by Tenant, its agents, employees, contractors and/or invitees,
      and (i) if the same cannot, in Landlord's reasonable judgment (which
      determination shall be made within thirty (30) days after the occurrence
      of such damage), be fully repaired or restored within two hundred twenty
      (220) days after Tenant's receipt of such notice, or (ii) if the same is
      not fully repaired or restored within two hundred seventy (270) days after
      Tenant's receipt of such notice, or (iii) the fire or casualty occurs
      during the last year of the term of this Lease and is not fully repaired
      or restored within thirty (30) days after the occurrence of such damage,
      then Tenant shall have the option, upon written notice to Landlord, for a
      period of ten (10) days

                                     -10-
<PAGE>
 
      thereafter, to terminate the Lease. The failure of Tenant to provide such
      notice within such period shall be deemed Tenant's waiver of its right to
      terminate this Lease as provided in this Section 22.

     ---------
23.   DEFAULT
     ---------

      The occurrence of any one or more of the following events shall constitute
      a default and breach of this Lease by Tenant:

      (a) The abandonment of the Premises by Tenant with non-payment of rent 
      (must be in excess of ten (10) business days).

      (b) The failure by Tenant to make any payment of rent or any other payment
      required to be made by Tenant hereunder, within five (5) days following
      the date when due.

      (c) The failure by Tenant to observe or perform any of the covenants,
      conditions or provisions of this Lease to be observed or performed by the
      Tenant, other than described in Article 23(a) above, where such failure
      shall continue for a period of thirty (30) days after written notice
      thereof by Landlord to Tenant; provided, however, that if the nature of
      Tenant's default is such that more than thirty (30) days are reasonably
      required for its cure, then Tenant shall not be deemed to be in default if
      Tenant commences such cure within said thirty (30)-day period and
      thereafter diligently prosecutes such cure to completion.

      (d) The making by Tenant of any general assignment or general arrangement
      for the benefit of creditors; or the filing by or against Tenant of a
      petition to have Tenant adjudged bankrupt, or a petition or reorganization
      or arrangement under any law relating to bankruptcy (unless, in the case
      of a petition filed against Tenant, the same is dismissed within sixty
      (60) days); or the appointment of a trustee or a receiver to take
      possession of substantially all of Tenant's assets located at the Premises
      or of Tenant's interest in this Lease, where possession is not restored to
      Tenant within thirty (30) days; or the attachment, execution or other
      judicial seizure of substantially all of Tenant's assets located at the
      Premises or of Tenant's interest in this Lease where such seizure is not
      discharged in thirty (30) days.

     ---------------------
24.   REMEDIES IN DEFAULT
     ---------------------

      In the event of Tenant's default Landlord may:

      (a) Terminate Tenant's right to possession of the Premises by any lawful
      means, in which case this Lease shall terminate and Tenant shall
      immediately surrender possession of the Premises to Landlord. In such
      event, Landlord shall be entitled to recover from Tenant:

          (1)  the worth at the time of the award of any unpaid rent which had 
      been earned at the time of such termination; plus

          (2)  the worth at the time of the award of the amount by which the
      unpaid rent which would have been earned after termination until the time
      of award exceeds the amount of such rental loss which Tenant proves could
      have been reasonably avoided; plus

          (3)  the worth at the time of the award of the amount by which the
      unpaid rent for the balance of the term after the time of award exceeds
      the amount of such rental loss which Tenant proves could be reasonably
      avoided; plus

          (4)  any other amount necessary to compensate Landlord for all the
      detriment proximately caused by Tenant's failure to perform its
      obligations under this Lease or which in the ordinary course of things
      would be likely to result therefrom (including, without limitation, the
      cost of recovering possession of the Premises, expenses of reletting
      including necessary renovation and alteration of the Premises, reasonable
      attorneys' fees, and real estate commissions actually paid and that
      portion of the leasing commission paid by Landlord and applicable to the
      unexpired portion of this Lease); plus

          (5)  such other amounts in addition to or in lieu of the foregoing as 
      may be permitted from time to time by applicable Colorado law.

          As used in Subsections (1) and (2) above, the "WORTH AT THE TIME OF
      THE AWARD" shall be computed by allowing interest at the lesser of ten
      percent (10%) per annum, or the maximum rate permitted by law per annum.
      As used in Subsection (3) above, the "WORTH AT THE TIME OF AWARD" shall be
      computed by discounting such amount at the discount rate of the Federal
      Reserve Bank of San Francisco at the time of award plus one percent (1%).

      (b) Continue this Lease in full force and effect, and the Lease will
      continue in effect, as long as Landlord does not terminate Tenant's right
      to possession, and Landlord shall have the right to collect rent when due.
      During the period Tenant is in default, Landlord may enter the Premises
      and relet them, or any part of them, to third parties for Tenant's
      account. Tenant shall be liable immediately to Landlord for all costs
      Landlord reasonably incurs in reletting the Premises, including, without
      limitation, brokers' commissions, expenses of remodeling the Premises
      required by the reletting, and like costs. Reletting can be for a period
      shorter or longer than the remaining term of this Lease. Tenant shall pay
      to Landlord the rent due under this Lease on the dates the rent is due,
      less the rent Landlord receives from any reletting. In no event shall
      Tenant be entitled to any excess rent received by Landlord. No act by
      Landlord allowed by this paragraph shall terminate this Lease unless
      Landlord notifies Tenant in writing that Landlord elects to terminate this
      Lease. After Tenant's default and for as long as Landlord does not
      terminate Tenant's right to possession of the Premises, if Tenant obtains
      Landlord's consent, Tenant shall have the right to assign or sublet its
      interest in this Lease, but Tenant shall not be released from liability.

      (c) Cause a receiver to be appointed to collect rent. Neither the filing
      of a petition for the appointment of a receiver nor the appointment itself
      shall constitute an election by Landlord to terminate the Lease.

                                     -11-

<PAGE>
 
     (d)  Cure the default at Tenant's cost. If Landlord at any time, by reason
     of Tenant's default, reasonably pays any sum or does any act that requires
     the payment of any sum, the sum paid by Landlord shall be due immediately
     from Tenant to Landlord at the time the sum is paid, and if paid at a later
     date shall bear interest at the lesser of ten percent (10%) per annum, or
     the maximum rate an individual is permitted by law to charge from the date
     the sum is paid by Landlord until Landlord is reimbursed by Tenant. The
     sum, together with interest on it, shall be additional rent.

     (c)  The foregoing remedies are not exclusive; they are cumulative, in
     addition to any remedies now or later allowed by law, to any equitable
     remedies Landlord may have, and to any remedies Landlord may have under
     bankruptcy laws or laws affecting creditors' rights generally. The waiver
     by Landlord of any breach of any term, covenant or condition of this Lease
     shall not be deemed a waiver of such term, covenant or condition or of any
     subsequent breach of the same or any other term, covenant or condition.
     Acceptance of rent by Landlord subsequent to any breach hereof shall not be
     deemed a waiver of any proceeding breach other than a failure to pay the
     particular rent so accepted, regardless of Landlord's knowledge of any
     breach at the time of such acceptance of rent. Landlord shall not be
     deemed to have waived any term, covenant or condition unless Landlord gives
     Tenant written notice of such waiver.

     (f) Nowithstanding anything to the contrary contained elsewhere in this
     Lease, Landlord shall use reasonable efforts to relet the Premises to
     mitigate its damages under this Section 24; provide, however, that so long
     as Landlord uses such reasonable efforts, Landlord shall in no way be
     responsible or liable for any failure to relet the Premises, or any part
     thereof, or any failure to collect any rent due upon such reletting; and
     Landlord shall not be required to spend its own funds, to give the Premises
     priority over or equal priority with any other facilities owned by Landlord
     or its affiliates or other space available for rent in the Building or to
     compromise in any way the terms, uses or creditworthiness of a Tenant upon
     or to which it would customarily lease space such as the Premises; and
     Landlord shall be entitled, in its sole discretion, to seek a single tenant
     for the portion of the Premises. Located on the second floor and up to 3
     tenants for the portion of the premises located on the first floor.

     ----------------
25.   EMINENT DOMAIN
     ----------------

     If more than twenty-five percent (25%) of the Premises shall be taken or
     appropriated by any public or quasi-public authority under the power of
     eminent domain, either party hereto shall have the right, at its option to
     terminate this Lease, and Landlord shall be entitled to any and all income,
     rent award, or any interest therein whatsoever which may be paid or made in
     connection with such public or quasi-public use or purpose, and Tenant
     shall have no claim against Landlord for the value of any unexpired term of
     this Lease. If either less than or more than twenty-five percent (25%) of
     the Premises is taken, and neither party elects to terminate as herein
     provided, the rental thereafter to be paid shall be equitably reduced. If
     twenty-five percent (25%) or more of the Building other than the Premises
     may be so taken or appropriated, Landlord shall have the right at its
     option to terminate this Lease and shall be entitled to the entire award as
     above provided. Notwithstanding the foregoing, Tenant may seek payment from
     the condemning authority for reimbursement for unamortized tenant
     improvements installed by Tenant, at its cost, goodwill, and relocation
     expenses, provided such recovery does not adversely affect Landlord's
     ability to recover amounts from such condemning authority.
 
     ----------------------
26.   ESTOPPEL CERTIFICATE
     ---------------------- 

     (a) Within ten (10) days following any written request which Landlord may
     make from time to time, Tenant shall execute and deliver to Landlord a
     statement certifying: (i) the date of commencement of this Lease; (ii) the
     fact that this Lease is unmodified and in full force and effect (or if
     there have been modifications hereto, that this Lease is in full force and
     effect, as modified, and stating the date and nature of such
     modifications); (iii) the date to which the rental and other sums payable
     under this Lease have been paid; (iv) the fact that there are no current
     defaults under this Lease by either Landlord or Tenant, except as specified
     in Tenant's statement; and (v) such other matters reasonably requested by
     Landlord. Landlord and Tenant intend that any statement delivered pursuant
     to this paragraph 26 may be relied upon by any mortgagee, beneficiary,
     purchaser or prospective purchaser of the Building or any interest therein.

     (b) Tenant's failure to deliver such statement within such time shall be
     conclusive upon Tenant (I) that this Lease is in full force and effect,
     without modification, except as may be represented by Landlord; (II) that
     there are no incurred defaults in Landlord's performance; and (III) that
     not more than one (1) month's rent has been paid in advance.

     ----------
27.   PARKING
     ----------

     Tenant shall have the nonexclusive right to use in common with other
     tenants or occupants of the Building, at a ratio of four and one-half (4.5)
     parking spaces per each one thousand (1,000) rentable square feet of the
     Premises, without change, the parking facilities of the Building, subject
     to rules and regulations of uniform application of Landlord for such
     parking facilities which may be established or altered by Landlord at any
     time or from time to time during the term hereof.

     ----------------------
28.   AUTHORITY OF PARTIES
     ---------------------- 

     If Tenant is a corporation or partnership, each individual executing this
     Lease on behalf of said corporation or partnership represents and warrants
     that he is duly authorized to execute and deliver this Lease on behalf of
     said corporation or partnership, in accordance with a duly adopted
     resolution or other document, and that this Lease is binding upon said
     corporation or partnership, as appropriate in accordance with its terms.
     The individuals signing on behalf of a corporate entity are executing this
     Lease in their respective corporate capacities and there shall be no
     individual liability imposed upon such signatories in such case.

                                     -12-
<PAGE>
 
29.  ---------------------
      DEFAULT BY LANDLORD
     ---------------------

     (a) Landlord shall not be deemed to be in default in the performance of any
     obligation required to be performed by it hereunder unless and until it has
     failed to perform such obligations within thirty (30) days after written
     notice by Tenant to Landlord specifying wherein Landlord has failed to
     perform such obligation; provided, however, that if the nature of
     Landlord's obligation is such that more than thirty (30) days are required
     for its performance, then Landlord shall not be deemed to be in default if
     it shall commence such performance within such thirty (30)-day period and
     thereafter diligently prosecute the same to completion. In no event shall
     Landlord be liable to Tenant for loss of profits, business interruption, or
     consequential damages if Landlord performs its obligations within the time
     periods specified in this paragraph.

     (b) Tenant agrees to give any mortgagee and/or trust deed holders, by
     registered mail, a copy of any Notice of Default served upon the Landlord,
     provided that prior to such notice Tenant has been notified in writing (by
     way of Notice of Assignment of Rents and Leases, or otherwise) of the
     address of such mortgagee and/or trust deed holder. Tenant further agrees
     that if Landlord shall have failed to cure such default within the time
     provided for in this Lease, then the mortgagees and/or trust deed holders
     shall have an additional thirty (30) days within which to cure such
     default, or if such default cannot be cured within that time, then such
     additional time as may be necessary if within thirty (30) days mortgagee
     and/or trust deed holder has commenced and is diligently pursuing the
     remedies necessary to cure such default (including, but not limited to,
     commencement of foreclosure proceedings, if necessary to effect such cure),
     in which event this Lease shall not be terminated while remedies are being
     so diligently pursued.

     (c) Notwithstanding any other provisions of this Lease to the contrary, but
     subject to the provisions of Section 20(a) and 20(b) above, upon receipt of
     written notice (the "FIRST DEFAULT NOTICE") from Tenant that Landlord has
     failed to perform any of its obligations as expressly set forth in this
     Lease (collectively, "LANDLORD OBLIGATIONS"). Landlord shall perform such
     obligation within a reasonable period of time given the circumstances but
     in no event later than thirty (30) days after it receives the First Default
     Notice; provided, however, that if the completion of such obligation is of
     such a nature that it cannot be completed within thirty (30) days, then
     such longer time as reasonably necessary. If Landlord fails to complete
     such obligation within the said time period, Tenant may give an additional
     notice (the "SECOND DEFAULT NOTICE") to Landlord. If Landlord fails to
     commence to complete such obligation within five (5) days after receipt of
     the Second Default Notice and thereafter diligently pursues the completion
     of such obligation, Tenant may complete such obligation. All obligations of
     Landlord performed by Tenant pursuant to this Section shall be made by a
     qualified licensed contractor(s) and/or qualified persons with sufficient
     expertise in such matters and in accordance with all applicable laws,
     statutes and ordinances. Landlord shall reimburse Tenant for Tenant's
     actual costs incurred within ten (10) days after Landlord's receipt of a
     written demand from Tenant, which demand shall include supporting invoices.
     If Landlord disputes the need for the completion of such obligation,
     Landlord shall deliver written notice of such disagreement to Tenant within
     ten (10) days after its receipt of the First Default Notice. The dispute
     shall be resolved by a mutually acceptable third party, which determination
     shall be binding upon Landlord and Tenant; provided, however, that if the
     parties cannot agree on such third party, then the dispute shall be
     resolved by arbitration pursuant to the commercial arbitration rules then
     in effect for the American Arbitration Association ("ARBITRATION"). The
     losing party shall pay the costs of the third party or arbitrator,
     whichever is applicable. If Landlord is obligated to reimburse Tenant for
     the actual cost and fails to do so as provided in this subsection, such
     amount shall accrue interest at the rate of fifteen percent (15.00%) per
     annum until paid in full.

     (d) Landlord acknowledges that certain of the Landlord Obligations may have
     to be made on an expedited basis due to a material disruption of Tenant's
     business operations caused by such condition, which condition shall be
     referred to as an "EMERGENCY CONDITION." In this regard, in the event an
     Emergency Condition relating to a Landlord Obligation exists, Tenant shall
     deliver to Landlord, by facsimile, a written notice ("EMERGENCY NOTICE")
     describing such Emergency Condition. The Emergency Notice shall, in ten
     (10) point bold typed across the top, stating "AN EMERGENCY SITUATION
     EXISTS AT THE PREMISES REQUIRING YOUR IMMEDIATE ATTENTION." In the event
     that Landlord fails to commence repair of the Emergency Condition within
     forty-eight (48) hours (if such situation occurs during non-business hours,
     Tenant shall utilize Landlord's paging system, the procedure for which
     shall be provided to Tenant prior to the Commencement Date), Tenant, using
     licensed contractors and/or persons which are qualified to perform such 
     tasks in compliance with applicable laws, shall have the right to perform
     the Landlord Obligation; provided, however, such repairs shall be limited
     to the temporary remediation of such Emergency Condition and Landlord shall
     thereafter be responsible for the full repair of such condition. Landlord
     shall reimburse Tenant's actual expenses incurred in making such temporary
     remediation repairs within fifteen (15) days following Landlord's receipt
     of written demand and supporting invoices. If such repayment is not made
     within such fifteen (15) day period, such amount shall accrue interest at
     the rate of fifteen (15.00%) per annum until paid in full.

     (e)  If Tenant has provided Landlord with the notice described in Section 
11(d) and/or (e) of this Lease, Tenant may not thereafter utilize the provisions
of Sections 29(c) and 29(d) for the same event.

30.  ---------------------
      HAZARDOUS MATERIALS
     ---------------------

     (a)  For the purpose of this Section 30(a) and this Lease, the following 
terms are defined as follows:

          (i)  "HAZARDOUS MATERIALS" shall mean any substance: (A) that now or 
     in the future is regulated or governed by, requires investigation or
     remediation under, or is defined as a hazardous waste, hazardous substance,
     pollutant or contaminant under any governmental statue, code, ordinance,
     regulation, rule or order, and any amendment thereto, including for example
     only and without limitation, the Comprehensive Environmental Response
     Compensation and Liability Act, 42 U.S.C. (S) 9601 et seq.. and the
                                                        -- ---
     Resource Conservation and Recovery Act, 42 U.S.C. (S) 6901 et seq., or (B)
                                                                -- --- 
     that is toxic, explosive, corrosive, flammable, radioactive, carcinogenic,
     dangerous or otherwise hazardous, including for example

                                     -13-



<PAGE>
 
      only and without limitation, gasoline, diesel, petroleum hydrocarbons,
      polychlorinated biphenyls (PCBs), asbestos, radon and urea formaldehyde
      foam insulation.

          (ii)  "ENVIRONMENTAL REQUIREMENTS" shall mean all present and future
      governmental statutes, codes, ordinances, regulations, rules, orders,
      permits, licenses, approvals, authorizations and other requirements of any
      kind applicable to Hazardous Materials.

          (iii) "HANDLE," "HANDLED," or "HANDLING" shall mean any installation,
      handling, generation, storing, treatment, use, disposal, discharge,
      release, manufacture, refinement, presence, migration, emission,
      abatement, removal, transportation, or any other activity of any type in
      connection with or involving Hazardous Materials by Tenant or its
      officers, employees, contractors, assignees, sublessees, agents or
      invitees. The word "contractors" which is contained in the preceding
      sentence shall not include any contractor which installs the Tenant
      Improvements or improvements constructed for the Expansion Space (as
      defined below).

          (iv)  "ENVIRONMENTAL LOSSES" shall mean all costs and expenses of any
      kind, damages, foreseeable and unforeseeable consequential damages, fines
      and penalties incurred in connection with any violation of and compliance
      with Environmental Requirements and all losses of any kind attributable to
      the diminution of value, loss of use or adverse effects on marketability
      or use of any portion of the Premises, Building or Project. As used herein
      the word "PROJECT" shall mean the Building and the land adjacent thereto
      depicted on Exhibit A to the Lease.
                  ---------

      (b)  Tenant covenants and warrants that it shall, at its own expense,
      promptly take all actions required by any governmental agency or entity in
      connection with the Handling of Hazardous Materials by Tenant at or about
      the Premises, Building or Project, including without limitation,
      inspection and testing, performing all cleanup, removal and remediation
      work required with respect to those Hazardous Materials introduced,
      released, or deposited by Tenant, complying with all closure requirements
      and post-closure monitoring, and filing all required reports or plans. All
      of the foregoing work and all Handling of all Hazardous Materials shall be
      performed in a good, safe and workmanlike manner by consultants qualified
      and licensed to undertake such work and in a manner that will not
      interfere with Landlord's use, operation, leasing and sale of the Project
      and other tenants' quiet enjoyment of their premises in the Property.
      Tenant shall deliver to Landlord prior to delivery to any governmental
      agency, or promptly after receipt from any such agency, copies of all
      permits, manifests, closure or remedial action plans, notices, and all
      other documents relating to the Handling of Hazardous Materials at or
      about the Premises, Building or Project by Tenant. Tenant shall remove at
      its own expense, by bond or otherwise, all liens or charges, of any kind
      filed or recorded against the Premises, Building or Project in connection
      with the Handling by Tenant, its agents, employees, contractors and/or
      subcontractors, of Hazardous Materials, within ten (10) days after the
      filing or recording of such lien or charge, and if Tenant fails to do so,
      Landlord shall have the right, but not the obligation, to remove the lien
      or charge at Tenant's expense in any manner Landlord deems expedient.

      (c)  Landlord shall have the right, but not the obligation, to enter the
      Premises at any reasonable time, upon prior notice (except in the case of
      emergency), (i) to confirm Tenant's compliance with the provisions of this
      Section, and (ii) to perform Tenant's obligations under this Section if
      Tenant has failed to do so. Landlord shall also have the right to engage
      qualified Hazardous Materials consultants to inspect the Premises and
      review the Handling of Hazardous Materials, including review of all
      permits, reports, plans, and other documents regarding same. If Landlord
      engages a consultant upon the reasonable good faith belief that Tenant is
      in violation of its obligations under Section 30, Tenant shall pay the
      costs of Landlord's consultant's fees and all costs incurred by Landlord
      in performing Tenant's obligations under this Section. Landlord shall use
      reasonable efforts to minimize any interference with Tenant's business
      caused by Landlord's entry into the Premises, but Landlord shall not be
      responsible for any interference caused thereby.

     -------------------
31.   OPTION TO EXTEND           
     -------------------

      At the expiration of the original Term hereof, Tenant may extend this
      Lease ("OPTION TO EXTEND") for two (2) successive terms of five (5) years
      each ("EXTENDED TERMS") by giving Landlord written notice of its intention
      to do so at least nine (9) months ("OPTION TO EXTEND NOTICE PERIOD") prior
      to the expiration of the original Term or First Extended Term, as
      applicable; provided, however, that Tenant is not in material default
      beyond any applicable cure period under the Lease on the date of giving
      such notice or on the date of commencement of such Extended Term. Upon the
      written request of Tenant, at any time during the six (6) month period
      prior to the Option to Extend Notice Period, Landlord shall provide Tenant
      with a written summary of its then existing terms and conditions upon
      which Landlord is willing to lease vacant space within the Building, which
      notice Landlord acknowledges shall be used in conjunction with Tenant's
      determination to exercise its Option to Extend; provided, however such
      summary shall not effect or be utilized by the appraisers in their
      respective determination of "FAIR MARKET RENTAL" as provided herein. Such
      Extended Term shall be upon all of the terms and conditions of this Lease,
      except that the following rights of Tenant during the original Term of
      this Lease shall not apply during such option period: (a) any right to
      rent-free possession, (b) any right to further extension of the term of
      the Lease beyond the Extended Terms set forth hereinabove, and (c) any
      right to continue to pay the same Base Rent. Landlord and Tenant hereby
      acknowledge and agree that the Base Rent during such Extended Term shall
      be the "FAIR MARKET RENTAL" for the Premises, as determined in accordance
      with this Section. The parties shall have until the date that is seven (7)
      months prior to the date that the original Term or first Extended Term, as
      applicable, will expire in order to agree on Base Rent during the Extended
      Term. If the parties agree on the Base Rent for the Extended Term during
      that period, they shall immediately execute an amendment to this Lease
      stating the Base Rent. If the parties are unable to agree on Base Rent for
      the Extended Term during that period, then the Fair Market Rental shall be
      established by appraisal. Landlord and Tenant shall each appoint one
      appraiser at least four (4) months prior to the expiration of the original
      term, or Extended Term, as applicable; provided, however, that if either
      party fails to designate an appraiser within the time period specified,
      then the appraiser who is designated shall conclusively determine the Fair
      Market Rental. If two (2) appraisers are designated, then they shall
      submit within thirty (30) days after the second thereof has been
      designated their appraisals of the Fair Market Rental. Landlord and Tenant
      intend that the "Fair Market Rental" shall be deemed to be the rent per
      square foot of Rentable Area of office space that is then being charged
      for office space located in office buildings in the Broomfield, Colorado
      vicinity that are comparable in quality and offer similar

                                     -14-

<PAGE>
 
     amenities to the Building and involving leases with similar terms and
     conditions, and involving the use of the premises for general office
     purposes. The office spaces used for comparison shall be comparable in
     size, age, quality and design to the Premises, and such office spaces used
     for comparison shall be comparable to the Premises with respect to their
     location within such buildings, the quality and quantity of tenant
     improvements installed at each landlord's expense, and the services
     provided by each landlord to such tenant, the financial strength of Tenant,
     and market provisions for improvement allowances, tenant improvement costs,
     free rent, or other lease concessions, lease term, base year, lease rate
     escalations and operating expenses and taxes. Should the two appraisers be
     unable to agree within said thirty (30) days, the two appraisers shall each
     submit an independent written appraisal and together they shall designate
     one (1) additional person as appraiser within five (5) days following the
     expiration of said thirty (30)-day period: provided, however, that if the
     difference between the two appraisals is five percent (5%) or less of the
     lowest appraisal, then an additional appraiser shall not be designated and
     the Fair Market Rental shall equal the average of the two (2) appraisals
     that are submitted. The third appraiser shall submit an independent written
     appraisal within thirty (30) days following his or her appointment. If the
     two appraisers cannot agree upon a third appraiser, then either party
     hereunder may request that any District Court Judge of the County District
     Court appoint such third appraiser. The Fair Market Rental shall be equal
     to the average of the two (2) written appraisals which are closest, and the
     third (3rd) appraisal shall be disregarded. Each party shall bear the cost
     of the appraiser appointed by it. If three (3) appraisers are appointed,
     each party shall bear the cost of the appraiser appointed by it and the
     parties shall share equally in the cost of the third appraiser. No person
     shall be appointed or designated an appraiser unless he or she is (i) an
     independent appraiser who is a currently certified member of the American
     Institute of Real Estate Appraisers (with MAI designation) and unless he or
     she has at least five (5) years' experience as an appraiser in Boulder
     County, Colorado, or (ii) a real estate broker with a minimum of at least
     ten (10) years' experience in leasing of commercial office space in the
     vicinity of the Project. The third appraiser shall not have ever been
     employed (full-time or part-time or on a consulting basis) by Landlord or
     Tenant. In the event that the Fair Market Rental is not established before
     the commencement of the extended term, Tenant shall continue to pay the
     Base Rent in effect as of the end of the original term; when the Fair
     Market Rental has been established, the new Base Rent shall be
     retroactively effective as of the beginning of the extended term, and
     Tenant shall pay Landlord any deficiency within thirty (30) days after the
     establishment of the new Base Rent. If Tenant has overpaid Base Rent during
     such period, such overpayment shall be offset against Rent thereafter
     coming due.

     ------------------
32.   RIGHT OF REFUSAL
     ------------------

     Tenant desires to have certain expansion rights with regard to any vacant
     space within the Building, which expansion space is hereinafter referred to
     as the "EXPANSION SPACE." Landlord is willing to grant such expansion
     rights in accordance with the terms and conditions of this Section.

     (a)  Landlord shall notify Tenant in writing ("INTERESTED PARTY NOTICE") of
     any third party ("INTERESTED PARTY") who expresses a bona fide interest in
     leasing the Expansion Space, or any portion thereof, as evidenced by a
     proposed letter of intent, or similar document, submitted to Landlord by
     the Interested Party, which Landlord is willing to accept. For a period of
     five (5) business days following Tenant's receipt of the Interested Party
     Notice, but subject to any rights granted by Landlord to other tenants of
     the Building prior to the Lease Date, Tenant shall have the right ("RIGHT
     OF REFUSAL") to lease the space described in the Interested party Notice by
     providing Landlord with written notice of such election ("ELECTION
     NOTICE"). The failure of Tenant to deliver the Election Notice to Landlord
     within such time period shall be deemed Tenant's waiver of the Right of
     Refusal and Landlord shall be free to lease the Expansion Space, or a
     larger space within the Building which includes the Expansion Space to the
     Interested Party.

     (b)  If Tenant elects to exercise its Right of Refusal, within fifteen (15)
     days thereafter, Landlord and Tenant shall enter into lease documentation
     of the exact terms and conditions set forth in the Interested Party Notice.

     (c)  As a condition to Tenant's right to exercise its Right of Refusal,
     Tenant shall continue, both before and after such exercise, to occupy the
     Premises originally demised under this Lease, and furthermore, as of the
     time of the exercise of the option, and at the time Tenant takes possession
     of such space, there shall not be an uncured default by Tenant under this
     Lease.

     (d)  In the event that Tenant elects or is deemed to have elected to not
     exercise its Right of Refusal, and Landlord and the Interested Party have
     not entered into a lease agreement within ninety (90) days following the
     date of such election by Tenant, the space described in the Interested
     Party Notice shall remain subject to Tenant's Right of Refusal.

     --------------------
33.   GENERAL PROVISIONS
     --------------------

     (i)   Plats and Exhibits.  Clauses, plats and exhibits, if any, signed by
           ------------------
     the Landlord and the Tenant endorsed on or affixed to this Lease are a part
     hereof.

     (ii)  Waiver.  The waiver by Landlord or Tenant of any term, covenant or
           ------
     condition herein contained shall not be deemed to be a waiver of such term,
     covenant or condition on any subsequent breach of the same or any other
     term, covenant or condition herein contained. The subsequent acceptance of
     rent hereunder by Landlord shall not be deemed to be a waiver of any
     preceding breach by Tenant of any term, covenant or condition of this
     Lease, other than the failure of the Tenant to pay the particular rental so
     accepted, regardless of Landlord's knowledge of such preceding breach at
     the time of the acceptance of such rent.

     (iii) Notices. All notices and demands which may or are to be required or
           -------
     permitted to be given by either party to the other hereunder shall be in
     writing. All notices and demands by the landlord to the Tenant shall be
     sent by United States Mail, postage prepaid addressed to the Tenant at the
     Premises, and 777 Campus Commons Road, Suite 200, Sacramento, California
     95825, or to such other place as Tenant may from time to time designate in
     a notice to the Landlord. All notices and demands by the Tenant to the

                                      -15-
<PAGE>
 
     Landlord shall be sent by United States Mail, postage prepaid, addressed to
     the Landlord at the office of the Building, or to such other person or
     place as the Landlord may from time to time designate in a notice to the
     Tenant.

     (iv)    Joint Obligation. If there be more than one (1) Tenant, the 
             ----------------
     obligations hereunder imposed upon Tenants shall be joint and several.

     (v)     Marginal Headings. The marginal headings and Article titles to the 
             -----------------
     Articles of this Lease are not a part of this Lease and shall have no
     effect upon the construction or interpretation of any part hereof.

     (vi)    Time. Time is of the essence of this Lease and each and all of its 
             ----
     provisions in which performance is a factor.

     (vii)   Successors and Assigns. The covenants and conditions herein
             ----------------------
     contained, subject to the provisions as to assignment, apply to and bind
     the heirs, successors, executors, administrators and assigns of the parties
     hereto.

     (viii)  Recordation. Neither Landlord nor Tenant shall record this Lease or
             ----------- 
     a short form memorandum hereof without the prior written consent of the
     other party.

     (xi)    Quiet Possession. Upon Tenant paying the rent reserved hereunder 
             ----------------
     and observing and performing all of the covenants, conditions and
     provisions on Tenant's part to be observed and performed hereunder, Tenant
     shall have quiet possession of the Premises for the entire term hereof,
     subject to all the provisions of this Lease.

     (x)     Limitation on Liability. In consideration of the benefits accruing 
             -----------------------
     hereunder, Tenant and all successors and assigns covenant and agree that,
     in the event of any actual or alleged failure, breach or default hereunder
     by Landlord: (1) Tenant's sole and exclusive recourse shall be against
     Landlord's interest in the Building and Tenant shall not have any right to
     satisfy any judgement which it may have against Landlord from any other
     assets of Landlord, (2) No partner, stockholder, director, officer,
     employee, beneficiary or trustee (collectively, "PARTNER") of Landlord
     shall be sued or named as a party in any suit or action (except as may be
     necessary to secure jurisdiction over Landlord); (3) No service of process
     shall be made against any Partner of Landlord (except as may be necessary
     to secure jurisdiction over Landlord); (4) No Partner of Landlord shall be
     required to answer or otherwise plead to any service of process; and (5) No
     judgement will be taken against any Partner of Landlord.

     (xi)    Late Charges. Tenant hereby acknowledges that late payment by 
             ------------
     Tenant to Landlord of rent or other sums due hereunder will cause Landlord
     to incur costs not contemplated by this Lease, the exact amount of which
     will be extremely difficult to ascertain. Such costs include, but are not
     limited to, processing and accounting charges, and late charges which may
     be imposed upon Landlord by terms of any mortgage or trust deed covering
     the Premises. Accordingly, if any installment or rent or of a sum due from
     Tenant shall not be received by Landlord or Landlord's designee within ten
     (10) days after the date such amount is past due, then Tenant shall pay to
     Landlord a late charge equal to five percent (5%) of such overdue amount.
     The parties hereby agree that such late charges represent a fair and
     reasonable estimate of the cost that Landlord will incur by reason of the
     late payment by Tenant. Acceptance of such late charges by the Landlord
     shall in no event constitute a waiver of Tenant's default with respect to
     such overdue amount, nor prevent Landlord from exercising any of the other
     rights and remedies granted hereunder.

     (xii)   Prior Agreements. This Lease contains all of the agreements of the 
             ----------------
     parties hereto with respect to any matter covered or mentioned in this
     Lease, and no prior agreements or understanding pertaining to any such
     matters shall be effective for any purpose. No provision of this Lease may
     be amended or added to, except by an agreement in writing signed by the
     parties hereto or their respective successors in interest. This Lease shall
     not be effective or binding on any party until fully executed by both
     parties hereto.

     (xiii)  Attorneys' Fees. If any action for breach of or to enforce the 
             ---------------
     provisions of this Lease is commenced, the court in such action shall award
     to the party in whose favor a judgement is entered, a reasonable sum as
     attorneys' fees and costs. The losing party in such action shall pay such
     attorneys' fees and costs. Tenant shall also indemnify Landlord against and
     hold Landlord harmless from all costs, expenses, demands and liability
     Landlord may incur if Landlord becomes or is made a party to any claim or
     action (a) instituted by Tenant against any third party, or by any third
     party against Tenant, or by or against any person holding any interest
     under or using the Project by license of or agreement with Tenant; (b) for
     foreclosure of any lien for labor or material furnished to or for Tenant or
     such other person; (c) otherwise arising out of or resulting from any act
     or transaction of Tenant or such other person; or (d) necessary to protect
     Landlord's interest under this Lease in a bankruptcy proceeding, or other
     proceeding involving Tenant under Title 11 of the United States Code, as
     amended. Tenant shall defend Landlord against any such claim or action at
     Tenant's expense with counsel reasonably acceptable to Landlord, or at
     Landlord's election, Tenant shall reimburse Landlord for any reasonable
     legal fees or costs Landlord incurs in any such claim or action.

     (xiv)   Inability to Perform. This Lease and the obligations of Tenant 
             --------------------
     hereunder shall not be affected or impaired because the Landlord is unable
     to fulfill any of its obligations or furnish services and utilities
     hereunder or is delayed in doing so, if such inability or delay is caused
     by reason of acts of God, strikes, lockouts, labor troubles, inability to
     procure materials, governmental laws or regulations, governmental requests
     for the general public welfare, or other causes beyond the reasonable
     control of Landlord.

     (xv)    Modification For Lender. If, in connection with obtaining 
             -----------------------
     construction, interim or permanent financing for the Building, the lender
     shall request reasonable modifications to this Lease as a condition to such
     financing, Tenant will not unreasonably withhold, delay or defer its
     consent thereto, provided that such modifications do not increase the
     obligations of Tenant hereunder or materially adversely affect the
     leasehold interest hereby created or Tenant's rights hereunder.

     (xvi)   Sale of Premises by Landlord. In the event of any sale of the 
             ----------------------------
     Building, Landlord shall be and is hereby entirely freed and relieved of
     all liability under any and all of its covenants and obligations contained
     in or derived from this Lease arising out of any act, occurrence or
     omission occurring after the consummation of sale; and the purchaser, at
     such sale or any subsequent sale of the Premises shall be

                                     -16-


<PAGE>
 
deemed, without any further agreement between the parties or their successors in
interest or between the parties and any such purchaser, to have assumed and 
agreed to carry out any and all of the covenants and obligations of the Landlord
under this Lease.

(xvii)  Subordination, Attornment.
        ------------------------- 

          (1)  This Lease is and shall be subordinate to any encumbrance now of 
record or recorded after the date of this Lease affecting the Building, other 
improvements, and land of which the Premises are a part. Such subordination is 
effective without any further act of Tenant. If any mortgagee, trustee, or 
ground lessor shall elect to have this Lease and any options granted hereby 
prior to the lien of its mortgage, deed of trust, or ground lease, and shall 
give written notice thereof to Tenant, this Lease and such options shall be 
deemed prior to such mortgage, deed of trust, or ground lease, whether this 
Lease or such options are deeded prior or subsequent to the date of said 
mortgage, deed of trust, or ground lease, or the date of recording thereof.

          (2)  In the event any proceedings are brought for foreclosure, or in 
the event of a sale or exchange of the real property on which the Building is 
located, or in the event of the exercise of the power of sale under any mortgage
or deed of trust made by Landlord covering the Premises, Tenant shall attorn to
the purchaser upon any such foreclosure and sale and recognize such purchaser as
the Landlord under this Lease.

          (3)  Tenant agrees to execute any documents required to effectuate an 
attornment or to make this Lease or any options granted herein prior to the lien
of any mortgage, deed of trust, or ground lease, as the case may be.

          (4)  Landlord agrees that Tenant's obligations to subordinate under 
this Section 33 (xvii) to any future ground lease, mortgage, or deed of trust 
shall be conditioned upon Tenant's receipt of a non-disturbance agreement from 
the party requiring such subordination (which party is referred to for the 
purposes of this Section as the "SUPERIOR LIENOR"). Such non-disturbance 
agreement shall provide, at a minimum, that Tenant's possession of the Premises 
shall not be interfered with following a foreclosure, provided Tenant is not in 
default beyond any applicable cure periods. Landlord's obligation with respect 
to such a non-disturbance agreement shall be limited to obtaining the 
non-disturbance agreement in such form as the Superior Lienor generally provides
in connection with its standard commercial loans, however, Tenant shall have the
right to negotiate, and Landlord shall use its good faith efforts and due 
diligence in assisting Tenant in the negotiation of, revisions to that 
non-disturbance directly with the Superior Lienor. Tenant agrees to use its good
faith efforts to reach agreement with the Superior Lienor upon acceptable terms 
and conditions of a non-disturbance agreement.

(xviii) Name.  Tenant shall not use the name of the Building or of the 
        ----
development in which the Building is situated for any purpose other than as an 
address of the business to be conducted by the Tenant in the Premises, except 
that Tenant may use the Building's name in any of Tenant's promotional material.

(xix)   Separability.  Any provision of this Lease, which shall prove to be 
        ------------
invalid, void or illegal, shall in no way affect, impair or invalidate any 
other provision hereof and such other provision shall remain in full force and 
effect.

(xx)    Cumulative Remedies.  No remedy or election hereunder shall be deemed 
        ------------------- 
exclusive, but shall, wherever possible, be cumulative with all other remedies 
at law or in equity.

(xxi)   Choice of Law.  This Lease shall be governed by the laws of the state, 
        -------------
in which the Premises are located.

(xxii)  Signage.  Subject to compliance with applicable laws, statutes and 
        -------
ordinances, and any covenants, conditions or restrictions encumbering the 
Building, Tenant shall be entitled to non-exclusive monument signage at the 
Building (such monument signage shall be located at the top space on such 
monument). Additionally, Tenant shall be entitled to Building directory signage 
and suite entry signage. All signage shall be subject to the prior approval of 
Landlord.

(xxiii) Environmental Condition.  To the best of Landlord's actual current 
        -----------------------
knowledge, excluding constructive knowledge or duty of inquiry, as of the 
Commencement Date, the Premises does not contain any Hazardous Materials in 
violation of any applicable law, statute or ordinance.

(xxix)  State Law Waiver.  To the maximum extent permitted under the laws of the
        ----------------
State of Colorado, Tenant waives any and all statutory rights provided to
tenants in general and Tenant agrees that the provisions of this Lease shall
govern its relationship with Landlord with regard to the Premises.

                                     -17-
<PAGE>
 
 
The parties hereto have executed this Lease at the place an on the dates
specified immediately adjacent to their respective signatures. If this Lease
has been filled in, it has been prepared for submission to your attorney for his
approval. No representation or recommendation is made by the real estate broker
or its agents or employees as to the legal sufficiency, legal effect, or tax
consequences of this Lease or the transaction relating thereto.

LANDLORD:                                 TENANT:                             
                                          
8990 GRANTLINE RENO INVESTORS,            LIGHTBRIDGE, INC.,                  
a California general partnership          a Delaware corporation 
                                                                              
By: /s/ Benjamin S. Catlin                By: /s/ Pamela D.A. Reeve           
   -------------------------------               -------------------------    
   Benjamin S. Catlin                            Pamela D.A. Reeve            
                                          Its:   President and Chief Executive
Date: 4/3/98                                     Officer                      
     -----------------------------                                            
                                          Date: 3/12/98                       
PANATTONI, JOHNSON & LOORZ,                     ---------------------          
a California general partnership       
                                          Address:   67 South Bedford 
By: /s/ Carl D. Panattoni                            Burlington, Massachusetts 
   -------------------------------
   Carl D. Panattoni                   
                                       
Date: 4/3/98                           
     -----------------------------     

/s/ Benjamin S. Catlin               
- ----------------------------------
Benjamin S. Catlin                   

Date: 4/3/98                           
     -----------------------------     
                                      
Address: 3620 Fair Oaks Boulevard     
         Sacramento, California 95864 

 
 
                                     -18-



<PAGE>
 
=====================================
     RULES AND REGULATIONS
=====================================

1.   Except as provided in the Lease, no sign, placard, picture, advertisement,
     name or notice shall be inscribed, displayed or printed or affixed on or to
     any part of the outside or inside of the Building without the written
     consent of Landlord first had and obtained and Landlord shall have the
     right to remove any such sign, placard, picture, advertisement, name or
     notice without notice to and at the expense of Tenant.

     All approved signs or lettering on doors shall be printed, painted, 
     affixed or inscribed at the expense of Tenant by a person approved of by 
     Landlord.

     Tenant shall not place anything or allow anything to be placed near the
     glass of any window, door, partition or wall which may appear unsightly
     from outside the Premises, however, that Landlord may furnish and install a
     building standard window covering at all exterior windows. Tenant shall not
     without prior written consent of Landlord cause or otherwise sunscreen any
     window.

2.   The sidewalks, halls, passages, exits, entrances, elevators and stairways
     shall not be obstructed by any of the tenants or used by them for any
     purpose other than for ingress and egress from their respective Premises.

3.   Tenant shall not alter any lock or install any new or additional locks or
     any bolts on any doors or windows of the Premises. In the event of the loss
     of any keys furnished by the Landlord, Tenant shall pay to the Landlord the
     cost thereof. Tenant is furnished with _________ (____) keys to the
     Building and ______ (_____) keys in the Premises. Tenant shall be
     responsible for any lock changes due to employee turnover.

4.   The toilet rooms, urinals, wash bowls and other apparatus shall not be used
     for any purpose other than that for which they were constructed and no
     foreign substance of any kind whatsoever shall be thrown therein and the
     expense of any breakage, stoppage or damage resulting from the violation of
     this rule shall be borne by the Tenant who or whose employees or invitees
     shall have caused it.

5.   Tenant shall not overload the floor of the Premises or in any way deface 
     the Premises or any part thereof.

6.   Tenant may move furniture, freight or equipment into the Building without
     the prior notice to Landlord and all moving of the same into or out of the
     Building shall be done in a way to not unreasonably interfere with the
     other tenants of the Building. Landlord shall have the right to prescribe
     the weight, size and position of all safes and other heavy equipment
     brought into the Building and also the times and manner of moving the same
     in and out of the Building. Safes or other heavy objects shall, if
     considered necessary by Landlord, stand on supports of such thickness as is
     necessary to properly distribute the weight. Landlord will not be
     responsible for loss of or damage to any such safe or property from any
     cause and all damage done to the Building by moving or maintaining any such
     safe or other property shall be repaired at the expense of Tenant.

7.   Tenant shall not use, keep, or permit to be used or kept any foul or
     noxious gas or substance in the Premises, or permit to suffer the Premises
     to be occupied or used in a manner offensive or objectionable to the
     Landlord or other occupants of the Building by reason of noise, odors
     and/or vibrations, or interfere in any way with other tenants or those
     having business therein, nor shall any animals or birds be brought in or
     kept in or about the Premises or the Building.

8.   Excepting microwave cooking and incidental cooking for employees and/or
     subtenants of Tenant, no cooking shall be done or permitted by any Tenant
     on the Premises, nor shall the Premises be used for the storage of
     merchandise, for washing clothes, for lodging, or for any improper,
     objectionable or immoral purposes. Tenant shall, in no event, allow cooking
     which emits a strong odor throughout the Building.

9.   Tenant shall not use or keep in the Premises or the Building any kerosene,
     gasoline or inflammable or combustible fluid or material, or use any method
     of heating or air conditioning other than that supplied by Landlord.

10.  Landlord will direct electricians as to where and how telephone and
     communication wires are to be introduced. No boring or cutting for wires
     will be allowed without the consent of the Landlord. The location of
     telephones, call boxes and other office equipment affixed to the Premises
     shall be subject to the approval of Landlord, not to be unreasonably
     withheld or delayed.

11.  On Saturdays, Sundays and legal holidays, and during non-Building hours set
     forth in the Lease, access to the Building or to the halls, corridors,
     elevators or stairways in the Building, or the Premises may be refused
     unless the person seeking access is known to the person or employee of the
     Building in charge and has a pass or is properly identified. The Landlord
     shall in no case be liable for damages for any error with regard to the
     admission to or exclusion from the Building of any person. In case of
     invasion, mob, riot, public excitement, or other commotion, the Landlord
     reserves the right to prevent access to the building during the continuance
     of the same by closing of the doors or otherwise, for the safety of the
     tenants and protection of property in the Building and the Building.

12.  Landlord reserves the right to exclude or expel from the Building any
     person who, in the judgment of the Landlord, is intoxicated or under the
     influence of liquor or drugs, or who shall in any manner do any act in
     violation of any of the rules and regulations of the Building.

13.  No vending machine or machines of any description shall be installed,
     maintained or operated upon the Premises without the written consent of the
     Landlord.

14.  Tenant shall not disturb, solicit, or canvass any occupant of the Building
     and shall cooperate to prevent same; provided, however, Tenant shall be
     entitled to market the business operations of Tenant at the Premises, in a
     professional manner, to other tenants within the Building.

                                     -19-
<PAGE>
 
15.  Landlord shall have the right to control and operate the public portions of
     the Building and the public facilities, and heating and air conditioning,
     as well as facilities furnished for the common use of the tenants, in such
     manner as it deems best for the benefit of the tenants generally.

16.  All entrance doors in the Premises shall be left locked when the Premises
     are not in use, and all doors opening to public corridors shall be kept
     closed except for normal ingress and egress from the Premises.

17.  No person shall be permitted to smoke within fifty (50) feet of the main
     and secondary entrance to the Building

                                     -20-
<PAGE>
 
                                  EXHIBIT A


                                 [FLOOR PLAN]

<PAGE>
 
                                   EXHIBIT B

                             WORK LETTER AGREEMENT
                                  (ALLOWANCE)

Ladies and Gentlemen:

          You (hereinafter called "Tenant") and we (hereinafter called 
"Landlord") are executing simultaneously with this Work Letter Agreement 
("Agreement"), a written Lease Agreement (the "Lease") covering those certain 
premises more particularly described in Exhibit A to the Lease (the "Premises") 
                                        ---------
in the building addressed at Broomfield, Colarado.

          To induce Tenant to enter into the Lease (which is hereby incorporated
by reference to the extent that the provisions of this agreement may apply
thereto) and in consideration of the mutual covenants hereinafter contained,
Landlord and Tenant mutually agree as follows:

     1.   DEFINITIONS.  Unless otherwise  defined  in this Agreement, the 
          -----------  
capitalized terms used herein shall have the meaning assigned to them in the 
Lease.

     2.   REPRESENTATIVES. Landlord hereby appoints Peter Llorenie as Landlord's
          ---------------
representative to act for Landlord in all matters covered by this Agreement. 
Tenant hereby appoints Deborah Rosson as Tenant's representative to act for 
Tenant in all matters covered by this Agreement. All inquires, requests, 
instructions, authorizations and other communications with respect to the 
matters covered by this Agreement shall be related to Landlord's representative 
or Tenant's representative as the case may be. Tenant will not make any 
inquiries of or request to and will not give any instructions or authorizations 
to any other employee or agent of Landlord, including Landlord's architects, 
engineers, and contractors or any of their agents or employees, with regard to 
matters covered by this Agreement. Either Landlord or Tenant may change its 
representative at any time by written notice to the other.
     
     3.   TENANT SPACE PLAN. On or before April 17, 1998. Tenant, through an  
          -----------------
architect or space planner reasonably acceptable to Landlord ("ARCHITECT"), 
shall prepare and deliver to Landlord a preliminary space plan and improvement 
plan for the Premises ("TENANT SPACE PLAN"). Such document shall be acceptable 
to Landlord, which approval shall not be unreasonably withheld.

     4.   TENANT WORKING DRAWINGS. Based upon the approved Tenant Space Plan,
          -----------------------
Tenant will, through the Architect, cause working drawings for the improvements
to the Premises (the "TENANT WORKING DRAWINGS") to be prepared and delivered to
Landlord on or before April 17, 1998. The Tenant Working Drawings will include
all architectural, mechanical and electrical engineering plans required for the
issuance of permits and the completion of the Tenant Improvements including
complete detailed plans and specifications for Tenant's partition layout,
reflected ceiling, heating and air conditioning, electrical outlets and
switches, telephone outlets, plumbing, fire sprinklers and finish
specifications. It is further agreed that all plans and specifications referred
to in this Paragraph 4 above are subject to Landlord's approval, which Landlord
agrees shall not be unreasonably withheld or delayed. Landlord's approval of the
Tenant Working Drawings, the Tenant Space Plan and any other plans or
specifications shall not constitute any representation as to the adequacy,
efficiency, performance or desirability of any space plan or improvements.
Tenant shall be entitled to an allowance of One and 50/100ths Dollars ($1.50)
per rentable foot of the Premises ("SPACE PLAN ALLOWANCE") to reimburse Tenant
for its actual cost in completing the Tenant Space Plan and Tenant Working
Drawings, which amount shall be paid to Tenant on the Commencement Date of the
Lease.

     5.   GENERAL CONTRACTOR. The construction of the Tenant Improvements shall
          ------------------
be done by Landlord's general contractor Saunders Construction ("GENERAL
CONTRACTOR"), in accordance with a construction contract ("CONSTRUCTION
CONTRACT") entered into between Landlord and the General Contractor, which shall
be upon terms and conditions reasonably acceptable to Tenant. The failure Tenant
to disapprove in writing of the proposed Construction Contract within five (5)
days following Tenant's receipt thereof shall be deemed Tenant's approval of
such document.

     6.   COST OF CONSTRUCTION AND PLANS. In connection with the Tenant
          ------------------------------  
Improvements to be constructed by Landlord, Landlord shall contribute an amount
equal to Twenty-Two Dollars ($22.00) ("ALLOWANCE") per rentable square foot of 
the Premises for the cost of construction, installation, obtaining of requisite 
materials and the completion of the Premises in accordance with this Work Letter
Agreement. The balance, if any, of the cost in completing the Tenant
Improvements (the "ABOVE-ALLOWANCE WORK"), including but not limited, the
reasonable and customary cost of overhead, supervision and profit, shall be paid
to Landlord in accordance with Paragraph 10 below. If the total cost of
completing the Tenant Improvements is less than the Allowance, any savings inure
to the benefit of Landlord. Tenant shall have the right to use tenant 
improvement allowance to complete the data center [Illegible].

     7.   FINAL TENANT COST PROPOSAL.  Within seven (7) days following 
          --------------------------
Landlord's approval of Tenant Working Drawings, Landlord will provide Tenant a 
final cost proposal for constructing the improvements to the Premises in 
accordance with the Tenant Working Drawings (the "FINAL TENANT COST PROPOSAL"). 
The Final Tenant Cost Proposal will be based on actual bids received  by the 
General Contractor in accordance with the provisions of the Construction 
Contract and shall set forth the cost to Tenant of constructing the Tenant 
Improvements, including the cost of the Above-Allowance Work. Landlord and 
Tenant shall confirm in writing, within five (5) business days following 
agreement thereon, the amount of the Final Tenant Cost Proposal.

     8.   APPROVAL OF FINAL TENANT COST PROPOSAL. Tenant will deliver to
          --------------------------------------   
Landlord written approval of the Final Tenant Cost Proposal or required 
modifications within five (5) business days after Tenant received such item.
Landlord shall use reasonable care in preparing the Final Tenant Cost Proposal;
provided, however, that the Final Tenant Cost Proposal shall not limit Tenant's
obligation to pay the actual cost of the Above-Allowance Work if such cost is
attributable to: (i) any changes in the Tenant Working Drawings required by the
governmental authority issuing the building permits for the Tenant Improvements;
or (ii) any changes, modifications, or change orders requested by Tenant; or
(iii) any delay by Tenant enumerated in Paragraph 11 below that increases the
cost of construction.

     9.   EFFECT OF APPROVAL. Tenant's preparation of Tenant Working Drawings
          ------------------
(initial or revised) will constitute Tenant's acknowledgement that such drawings
correctly depict the proper layout and design for any and all improvements to
the Premises desired by Tenant. Tenant's execution of a Final Tenant Cost

                                      -1-

 

<PAGE>
 
Proposal will constitute authorization to Landlord to proceed with and complete 
construction of the Tenant Improvements in the Premises. All of the work called 
for by the Tenant Working Drawings will be performed by the General Contractor 
and subcontractors retained in accordance with the Construction Contract. 
Following approval of the Tenant Working Drawings, Landlord will submit the 
Tenant Working Drawings to the appropriate governmental authorities for 
necessary approvals and buildings permits.

     10.  PAYMENT FOR ABOVE-ALLOWANCE WORK.  Tenant shall be responsible for the
          --------------------------------
payment of any Above-Allowance Work, and shall pay Landlord such amount prior to
the commencement of construction of the Tenant Improvements. Landlord shall 
thereafter furnish reasonable evidence of the cost of such Above-Allowance Work,
including requisitions from the General Contractor.

     11.  COMPLETION AND RENTAL COMMENCEMENT DATE.  Each of the following shall 
          --------------------------------------- 
be deemed a Tenant delay for the purposes of establishing the Commencement Date 
of the Lease:

               (a)  Tenant's failure to timely complete the Tenant Space Plan 
and/or Tenant Working Drawings (or revisions to such drawings); or

               (b)  Tenant's request for new work involving Above-Allowance 
Work; or

               (c)  modifications, revisions and changes to the Tenant Space
Plan or Tenant Working Drawings requested by or on behalf of Tenant; or

               (d)  changes in the work requested by or on behalf of Tenant or 
orders to halt or delay the work given by or on behalf of Tenant; or

               (e)  any delay in the completion of the work caused by Tenant's 
contractors or materials suppliers; or

               (f)  any other delay of any kind or nature caused by Tenant or 
its contractors architects, space planners or other agents or employees.

     12.  CHANGE ORDERS.  Tenant may authorize changes in the final Tenant 
          -------------
Working Drawing or work during construction only by written instructions to
Landlord's representative on a form approved by Landlord. Also, such changes
will be subject to Landlord's prior written approval. Before commencing any
change, Landlord will prepare and deliver to Tenant, for Tenant's approval, the
change order setting forth the cost of such change, which will include
associated architectural, engineering and construction fees, if any, and the
cost of such change for Landlord's contractor's overhead. If Tenant fails to
approve such change order within three (3) days, Tenant will be deemed to have
withdrawn the proposed change and Landlord will not proceed to perform that
change. If Tenant timely approves such change order, Tenant will within ten (10)
days of Substantial Completion of the Tenant Improvements pay to Landlord any
amounts payable by Tenant in connection with the change orders provided for in
this Paragraph.

     13.  NO ROOF ACCESS.  Tenant agrees that neither this Agreement nor the 
          --------------
Lease grants Tenant any right to access to the roof of the Building. Should 
Landlord, in connection with this Agreement or the Lease, agree to mount 
equipment of any nature on the Building roof, such equipment shall, at 
Landlord's option, either be maintained and installed by Landlord, or maintained
and installed under Landlord's direction, unless this Agreement expressly 
provides otherwise, all at Tenant's expense. Should this Agreement or the Lease
permit Tenant to install any equipment on the roof, any modifications to the 
roof or the roof's structure to accommodate that equipment shall be made at 
Tenant's sole cost and expense.

     14.  EXCESSIVE LOADS.  Tenant agrees that should the nature of its layout 
          ---------------
or any of its equipment, fixtures or furnishings to be placed in the Premises 
place a burden in excess of the Building's designed load, Tenant agrees to pay 
Landlord the cost of any modifications to the Building necessary to accommodate 
Tenant's furniture, furnishings or layout, as well as any design, engineering 
or other professional fees incurred by Landlord in connection with such 
modifications.

     15.  ALTERATIONS.  Any alterations or improvements described by Tenant 
          ------------
after Landlord's delivery of the Premises shall be subject to the provisions of 
the Lease.

     If the foregoing correctly sets forth our understanding, please sign this 
Agreement where indicated below.


LANDLORD:                                   TENANT:
                                            
8990 GRANTLINE RENO INVESTORS,              LIGHTBRIDGE, INC.,
a California general partnership            a Delaware corporation
                                            
                                            
By:___________________________              By: /s/ Pamela D. A. Reeve
       Benjamin S. Catlin                      ---------------------------------
                                                   Pamela D. A. Reeve
                                            Its:   President and Chief Executive
                                                   Officer
Date: ________________________            
                                          
                                            Date:   3/12/98
                                                 -------------------------------
                                          
                                            Address:   67 South Beadford
                                                       Burlington, Massachusetts

                                      -2-
<PAGE>
                                   EXHIBIT C

                 FIRST AMENDMENT TO LEASE AND ACKNOWLEDGEMENT

     This First Amendment to Lease and Acknowledgement ("FIRST AMENDMENT") is
made as of ____________, 19 __, with reference to that certain Lease Agreement
("LEASE") by and between 8900 GRANTLINE ROAD INVESTORS, a California general 
partnership, PANATTONI, JOHNSON & LOORZ, a California general partnership and
BENJAMIN S. CATLIN, as tenants-in-common (herein called "Landlord"), and
LIGHTBRIDGE INC., a Delaware corporation, (herein called "Tenant"), regarding
that certain premises ("PREMISES") located at ______________________________,
and which is more particularly described in the Lease.

     The undersigned hereby confirms the following and the provisions of the 
Lease are hereby amended by the following:

     1.   That Tenant accepted possession of the Premises from Landlord on 
__________, 19__, and acknowledges that the Premises are as represented by 
Landlord, in good condition and repair, and that the improvements, if any, 
required to be constructed for Tenant by Landlord pursuant to the Lease, have 
been so constructed and are satisfactory completed in all respects, excepting 
___________.

     2.   The usable square footage of the Premises is ______________ and the 
rentable square footing of the Premises is __________________.

     3.   Tenant's proportionate share of increases in Direct Expenses, as 
described in Section 8 of the Lease is ___________ percent (____%).

     4.   That all conditions which are to be satisfied prior to the full 
effectiveness of the Lease have been satisfied and that landlord has fulfilled 
all of its duties of an inducement nature.

     5.   That in accordance with Section 3 of the Lease, the Commencement Date 
is ______________, 19__, and that, unless sooner terminated, the expiration date
is ______________.

     6.   That the Lease is in full force and effect and that the same 
represents the entire agreement between Landlord and Tenant concerning Tenant's 
lease of the Premises.

     7.   That there are no existing defenses which Tenant has against the 
enforcement of the Lease by Landlord, and no offsets or credits against any 
amounts owed by Tenant pursuant to the Lease.

     8.   That Tenant's obligations to pay the Base Rent is presently in effect 
and that all rentals, charges and other obligations on the part of Tenant under 
the Lease commences to accrue on __________________, 19__.

     9.   That Tenant has not made any prior assignment, hypothecation or pledge
of the Lease or of the rents thereunder.

     10.  Except as modified herein, the Lease remains in full force and effect.

     IN WITNESS WHEREOF, the parties have executed this First Amendment as of 
the date set forth below.

LANDLORD:                                 TENANT:                             
                                          
8990 GRANTLINE RENO INVESTORS,            LIGHTBRIDGE, INC.,                  
a California general partnership          a Delaware corporation 
                                                                              
By:                                       By:                                 
   -------------------------------           -------------------------    
   Benjamin S. Catlin                            Pamela D.A. Reeve            
                                          Its:   President and Chief Executive
                                                 Officer                      
                                                                              
Date:                                     Date:                               
     -----------------------------             -----------------------          
                                       
                                          Address:   67 South Bedford 
                                                     Burlington, Massachusetts 
PANATTONI, JOHNSON & LOORZ,            
a California general partnership       

By:                                     
   -------------------------------     
   Carl D. Panattoni                   
                                       
                                       
Date:                                    
     -----------------------------             

                                
- ----------------------------------
Benjamin S. Catlin              

Date:                                    
     -----------------------------             
                                      
Address: 3620 Fair Oaks Boulevard      
         Sacramento, California 95864  

                                      -1-

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 5
       
<S>                                       <C>
<PERIOD-TYPE>                                    3-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               MAR-31-1998
<CASH>                                      12,762,060
<SECURITIES>                                         0
<RECEIVABLES>                               14,919,208
<ALLOWANCES>                                   218,873
<INVENTORY>                                          0
<CURRENT-ASSETS>                             2,917,004
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<DEPRECIATION>                               9,731,766
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<CURRENT-LIABILITIES>                        8,175,090
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                                0
                                          0
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<TOTAL-LIABILITY-AND-EQUITY>                49,771,970
<SALES>                                     13,302,816
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<CGS>                                        6,299,709
<TOTAL-COSTS>                                7,055,546
<OTHER-EXPENSES>                                     0
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<INTEREST-EXPENSE>                              65,840
<INCOME-PRETAX>                                149,710
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</TABLE>


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