CARRAMERICA REALTY CORP
10-Q, 2000-05-12
REAL ESTATE INVESTMENT TRUSTS
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<PAGE>

                      SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20543


                                   FORM 10-Q


               QUARTERLY REPORT UNDER SECTION 13 OR 15(d) OF THE
                        SECURITIES EXCHANGE ACT OF 1934


                       FOR QUARTER ENDED March 31, 2000
                                         --------------

                          COMMISSION FILE NO. 1-11706
                                              -------

                        CARRAMERICA REALTY CORPORATION
- --------------------------------------------------------------------------------
            (Exact name of registrant as specified in its charter)


              Maryland                                  52-1796339
- ------------------------------------           -------------------------------
    (State or other jurisdiction of            (I.R.S. Employer Identification
    incorporation or organization)              Number)


                  1850 K Street, N.W., Washington, D.C. 20006
- --------------------------------------------------------------------------------
              (Address or principal executive office) (Zip code)


       Registrant's telephone number, including area code (202) 729-1000
                                                          --------------


                                      N/A
- --------------------------------------------------------------------------------
  (Former name, former address and former fiscal year, if changed since last
                                    report)


           Number of shares outstanding of each of the registrant's
                 classes of common stock, as of May 10, 2000:

           Common Stock, par value $.01 per share: 67,027,109 shares
- --------------------------------------------------------------------------------

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 twelve (12) months (or such shorter period that the Registrant was
required to file such report) and (2) has been subject to such filing
requirements for the past ninety (90) days.

                           YES   X      NO
                                ---        -----
<PAGE>

                                     Index
                                     -----
<TABLE>
<CAPTION>
                                                                                                                        Page
                                                                                                                        ----
<S>                                                                                                                     <C>
Part I: Financial Information
- -----------------------------

Item 1.  Financial Statements

         Consolidated balance sheets of CarrAmerica Realty Corporation and subsidiaries as of March
         31, 2000 (unaudited) and December 31, 1999................................................................        4

         Consolidated statements of operations of CarrAmerica Realty Corporation and subsidiaries
         for the three months ended  March 31, 2000 and 1999 (unaudited)...........................................        5

         Consolidated statements of cash flows of CarrAmerica Realty Corporation and subsidiaries
         for the three months ended  March 31, 2000 and 1999 (unaudited)...........................................        6

         Notes to consolidated financial statements (unaudited)....................................................  7 to 11

Item 2.  Management's Discussion and Analysis of Financial Condition and Results of Operations..................... 12 to 16

Item 3.  Quantitative and Qualitative Disclosures About Market Risk................................................       17


Part II: Other Information
- --------------------------

Item 4.   Submission of Matters to a Vote of Security Holders.....................................................        18

Item 6.  Exhibits and Reports on Form 8-K.........................................................................        18
</TABLE>
                                       2

<PAGE>

                                    Part I


Item 1.  Financial Information
         ---------------------

         The information furnished in the accompanying consolidated balance
sheets, consolidated statements of operations and consolidated statements of
cash flows of CarrAmerica Realty Corporation and subsidiaries (the Company)
reflect all adjustments which are, in the opinion of management, necessary for a
fair presentation of the aforementioned financial statements for the interim
periods.

         The aforementioned financial statements should be read in conjunction
with the notes to the financial statements and Management's Discussion and
Analysis of Financial Condition and Results of Operations.

                                       3

<PAGE>

               CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES
             Consolidated Balance Sheets As Of March 31, 2000 and
                               December 31, 1999
- --------------------------------------------------------------------------------

(In thousands, except per share and share amounts)

<TABLE>
<CAPTION>
                                                                                     March 31,          December 31,
                                                                                       2000                1999
                                                                                       ----                ----
                                                                                  (Unaudited)
<S>                                                                               <C>               <C>
Assets
- ------
Rental property:
     Land                                                                         $    680,882         $    674,390
     Buildings                                                                       2,120,928            2,082,533
     Tenant improvements                                                               325,324              304,983
     Furniture, fixtures and equipment                                                   5,997                5,916
                                                                                  ------------         ------------
                                                                                     3,133,131            3,067,822
     Less - accumulated depreciation                                                  (348,860)            (323,455)
                                                                                  ------------         ------------
         Total rental property                                                       2,784,271            2,744,367

Land held for development                                                              103,859              104,050
Construction in progress                                                                75,315              116,013

Cash and cash equivalents                                                               44,344               51,886
Restricted cash and cash equivalents                                                    13,054               12,475
Accounts and notes receivable                                                           29,113               34,734
Investments                                                                             68,579               67,143
Accrued straight-line rents                                                             50,438               47,764
Tenant leasing costs, net                                                               60,205               58,848
Deferred financing costs, net                                                           14,419               15,621
Prepaid expenses and other assets, net                                                  22,792               18,503
Net assets of discontinued operations                                                  210,645              207,668
                                                                                  ------------         ------------
                                                                                  $  3,477,034         $  3,479,072
                                                                                  ============         ============
Liabilities, Minority Interest, and Stockholders' Equity
- --------------------------------------------------------

Liabilities:
     Mortgages and notes payable                                                  $  1,609,911         $  1,603,371
     Accounts payable and accrued expenses                                              67,142               68,643
     Rent received in advance and security deposits                                     28,344               27,757
                                                                                  ------------         ------------
         Total liabilities                                                           1,705,397            1,699,771

Minority interest                                                                       92,405               92,586

Stockholders' equity:
     Preferred Stock, $.01 par value, authorized 35,000,000 shares:
         Series A Cumulative Convertible Redeemable Preferred Stock, $.01 par
              value, 480,000 shares issued and outstanding at March 31, 2000 and
              680,000 shares issued and outstanding at December 31, 1999 with an
              aggregate liquidation preference of $12.0 million and
              $17.0 million, respectively.                                                   5                    7
         Series B, C and D Cumulative Redeemable Preferred Stock,
              8,800,000 shares issued and outstanding with an aggregate
              liquidation preference of $400.0 million.                                     88                   88
     Common Stock, $.01 par value, authorized 180,000,000 shares, issued and
        outstanding 67,027,108 shares at March 31, 2000 and 66, 826,288 shares
        at December 31, 1999                                                               671                  668
     Additional paid in capital                                                      1,817,502            1,816,990
     Cumulative dividends in excess of net income                                     (139,034)            (131,038)
                                                                                  ------------         ------------
         Total stockholders' equity                                                  1,679,232            1,686,715
                                                                                  ------------         ------------

                                                                                  $  3,477,034         $  3,479,072
                                                                                  ============         ============
</TABLE>

See accompanying notes to consolidated financial statements

                                       4

<PAGE>

                CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES
                     Consolidated Statements of Operations
              For the Three Months Ended March 31, 2000 and 1999
- --------------------------------------------------------------------------------

(Unaudited and in thousands, except per share amounts)

<TABLE>
<CAPTION>
                                                                                     2000                  1999
                                                                                     ----                  ----
<S>                                                                               <C>                  <C>
Revenues:
   Rental income:
     Minimum base rent                                                            $   113,880          $   103,140
     Recoveries from tenants                                                           16,834               14,133
     Parking and other tenant charges                                                   5,911                4,185
                                                                                  -----------          -----------
         Total rental revenue                                                         136,625              121,458
   Real estate service revenue                                                          4,941                3,900
                                                                                  -----------          -----------
         Total operating revenues                                                     141,566              125,358
                                                                                  -----------          -----------

Operating expenses:
   Property expenses:
     Operating expenses                                                                32,282               29,304
     Real estate taxes                                                                 11,946               11,041
   Interest expense                                                                    26,890               21,318
   General and administrative                                                           9,772                9,309
   Depreciation and amortization                                                       32,149               26,155
                                                                                  -----------          -----------
         Total operating expenses                                                     113,039               97,127
                                                                                  -----------          -----------
Real estate operating income                                                           28,527               28,231
                                                                                  -----------          -----------

Other operating income:
   Interest Income                                                                        877                  912
   Equity in earnings of unconsolidated partnerships                                    1,449                1,495
   Gain on settlement of treasury locks                                                    --                4,489
                                                                                  -----------          -----------
              Total other operating income                                              2,326                6,896
                                                                                  -----------          -----------

         Income from continuing operations before gain on sale of assets
                  and minority interest                                                30,853               35,127
Minority Interest                                                                      (3,055)              (5,736)
                                                                                  -----------          -----------
         Income from continuing operations before gain on sale of assets               27,798               29,391

Discontinued operations - Loss from Executive Suites operations (less
   applicable income tax expense of $218 and $252, respectively).                      (1,380)              (1,271)
                                                                                  -----------          -----------
         Income before gain on sale of assets                                          26,418               28,120

Gain on sale of assets, net of income taxes                                             5,354               18,055
                                                                                  -----------          -----------
         Net income                                                               $    31,772               46,175
                                                                                  ===========          ===========

         Basic net income per common share:
              Income from continuing operations                                   $      0.36          $      0.55
              Discontinued operations                                                   (0.02)               (0.02)
                                                                                  -----------          -----------
                  Net income                                                      $      0.34          $      0.53
                                                                                  ===========          ===========
         Diluted net income per share:
              Income from continuing operations                                   $      0.36          $      0.54
              Discontinued operations                                                   (0.02)               (0.02)
                                                                                  -----------          -----------
                  Net income                                                      $      0.34          $      0.52
                                                                                  ===========          ===========
</TABLE>

See accompanying notes to consolidated financial statements

                                       5

<PAGE>

                CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES
                     Consolidated Statements of Cash Flows
              For the Three Months Ended March 31, 2000 and 1999
- -------------------------------------------------------------------------------

(Unaudited and in thousands)

<TABLE>
<CAPTION>
                                                                                      2000                1999
                                                                                      ----                ----
<S>                                                                               <C>                 <C>
Cash flows from operating activities:
   Net income                                                                     $     31,772         $   46,175
                                                                                  ------------         ----------
   Adjustments to reconcile net income to net cash provided by operating
    activities:
     Depreciation and amortization                                                      38,550             30,402
     Minority interest in income                                                         2,999              5,719
     Stock and units issued in connection with compensation plans                          643                378
     Equity in earnings of unconsolidated partnerships                                  (1,449)            (1,495)
     Gain on sale of assets                                                             (5,354)           (18,055)
     Other                                                                                 254              1,236
    Change in assets and liabilities, net of acquisitions and dispositions:
     Increase in accounts and notes receivable                                          (3,073)            (4,821)
     (Increase) decrease in accrued straight-line rents                                 (3,001)               640
     Additions to tenant leasing costs                                                  (2,396)            (2,120)
     Decrease (increase) in prepaid expenses and other assets                              279             (4,436)
     Decrease in accounts payable and accrued expenses                                  (1,691)           (10,381)
     Increase (decrease) in rent received in advance and security deposits               3,349             (4,550)
                                                                                  ------------         ----------
         Total adjustments                                                              29,110             (7,483)
                                                                                  ------------         ----------
         Net cash provided by operating activities                                      60,882             38,692
                                                                                  ------------         ----------
Cash flows from investing activities:
     Acquisition and development of rental property                                    (32,601)           (12,751)
     Acquisition and development of executive suites assets                             (8,640)           (19,760)
     Additions to land held for development                                             (5,489)           (10,061)
     Additions to construction in progress                                              (5,092)           (65,048)
     Distributions from unconsolidated partnerships                                      1,402             21,440
     Investments in unconsolidated partnerships                                         (2,673)            (1,409)
     Acquisition of minority interest                                                     (229)                --
     Decrease (increase) in restricted cash and cash equivalents                            63            (20,852)
     Proceeds from sales of rental property                                             32,719            253,771
                                                                                  ------------         ----------
         Net cash provided (used) by investing activities                              (20,540)           145,330
                                                                                  ------------         ----------
Cash flows from financing activities:
     Repurchase of common stock                                                             --           (109,693)
     Net borrowings (repayments) on unsecured credit facility                           10,000            (65,000)
     Proceeds from refinance of existing mortgages                                          --             41,220
     Repayment of mortgages payable                                                     (3,460)            (3,711)
     Dividends and distributions to minority interests                                 (42,913)           (44,816)
     Contributions from minority interests                                                  --              5,888
     Additions to deferred financing costs                                                  --             (1,052)
                                                                                  ------------         ----------
         Net cash used by financing activities                                         (36,373)          (177,164)
                                                                                  ------------         ----------
         Foreign currency translation adjustment                                          (854)            (1,733)
                                                                                  ------------         ----------
         Increase in unrestricted cash and cash equivalents                              3,115              5,125
Unrestricted cash and cash equivalents, beginning of the period                         55,332             36,499
                                                                                  ------------         ----------
Unrestricted cash and cash equivalents, end of the period                         $     58,447         $   41,624
                                                                                  ============         ==========

Supplemental disclosure of cash flow information:
   Cash paid for interest (net of capitalized interest of $3,218 and $8,055
     for the three months ended March 31, 2000 and 1999, respectively)            $     31,997         $   18,257
                                                                                  ============         ==========
</TABLE>

See accompanying notes to consolidated financial statements

                                       6
<PAGE>

                CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES
                  Notes to Consolidated Financial Statements
                                  (Unaudited)
- --------------------------------------------------------------------------------

(1)  Description of Business and Summary of Significant Accounting Policies

     (a)  Business

          CarrAmerica Realty Corporation (the "Company") is a self-administered
          and self-managed equity real estate investment trust ("REIT"),
          organized under the laws of Maryland, which owns, develops, acquires
          and operates office properties. The Company's office properties
          primarily are located in 14 suburban markets across the United States.

     (b)  Basis of Presentation

          The accounts of the Company and its majority-owned/controlled
          subsidiaries and affiliates are consolidated in the accompanying
          financial statements. The Company uses the equity method of accounting
          for its investments in and earnings and losses of unconsolidated
          partnerships not controlled by the Company. Management of the Company
          has made a number of estimates and assumptions relating to the
          reporting of assets and liabilities, revenues and expenses, and the
          disclosure of contingent assets and liabilities to prepare these
          financial statements in conformity with generally accepted accounting
          principles. Actual results could differ from those estimates.

     (c)  Interim Financial Statements

          The information furnished reflects all adjustments, which are, in the
          opinion of management, necessary to reflect a fair presentation of the
          results for the interim periods, and all such adjustments are of a
          normal, recurring nature.

     (d)  New Accounting Pronouncements

          In June 1998, the FASB issued SFAS No. 133 "Accounting for Derivative
          Instruments and Hedging Activities", which requires that an entity
          recognize all derivatives as either assets or liabilities in the
          statement of financial position and measure those instruments at fair
          value. This statement, as amended, is effective for all fiscal
          quarters of fiscal years beginning after June 15, 2000. The Company is
          evaluating and has not yet determined the impact of this
          pronouncement.

     (e)  Per Share Data and Dividends

          The following is a reconciliation of the numerators and denominators
          of the basic and diluted EPS computations for income from continuing
          operations before extraordinary item:

<TABLE>
<CAPTION>
                                                    Three Months                           Three Months
                                                 Ended March 31, 2000                   Ended March 31, 1999
                                       -----------------------------------------------------------------------------
                                           Income                       Per        Income                       Per
                                           (000's)       Shares        Share       (000's)        Shares       Share
                                         (Numerator)  (Denominator)    Amount    (Numerator)  (Denominator)   Amount
                                       -----------------------------------------------------------------------------
          <S>                          <C>            <C>              <C>       <C>           <C>            <C>
          Basic EPS                    $ 24,375           66,967       $ 0.36     $ 38,701        71,099      $ 0.54
          Effect of Dilutive
            Stock Options                    --              248           --           --           293          --
            Series A Preferred               --               --           --          315           680          --
            Units in Carr Realty, LP         --               --           --          873         1,778          --
                                       --------           ------       ------     --------        ------      ------
          Diluted  EPS                 $ 24,375           67,215       $ 0.36     $ 39,889        73,850      $ 0.54
                                       ========           ======       ======     ========        ======      ======
</TABLE>

          Income from continuing operations before extraordinary item has been
          reduced by preferred stock dividends of $8,777 and $8,745 for the
          three month periods ended March 31, 2000 and 1999, respectively.

          The effects of stock options, units and Series A Preferred Stock are
          not included in the computation of diluted EPS for a given period if
          their effect is antidilutive.

                                       7
<PAGE>

                CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES
           Notes to Consolidated Financial Statements (Continued)
                                  (Unaudited)
- --------------------------------------------------------------------------------

     (f)  Reclassifications

          Certain reclassifications of prior period amounts have been made to
          conform to the current period's presentation.

(2)  Hedging Transactions

     In 1998, the Company entered into forward treasury agreements in order to
     hedge against the impact that interest rate fluctuations would have on debt
     instruments the Company planned to issue in the future. At December 31,
     1998, the Company determined that these agreements no longer represented
     effective hedges and recorded a loss of $13.7 million in anticipation of
     terminating the agreements. In February 1999, the Company settled these
     contracts for $9.2 million in cash and recorded a gain of $4.5 million.

(3)  Common Stock

     In April 1998, the Company sold 5,000,000 shares of common stock to Merrill
     Lynch, Pierce, Fenner & Smith Incorporated ("Merrill Lynch"), resulting in
     net proceeds to the Company of approximately $147 million, in what is
     commonly know as a "forward equity sale" transaction. In 1998, the Company
     paid Merrill Lynch $39.3 million and in March 1999 the Company settled this
     agreement with a final payment of $109.7 million, at which time the
     5,000,000 shares were repurchased by the Company and cancelled.

(4)  Discontinued Operations

     On January 20, 2000, the Company, HQ Global, VANTAS and FrontLine Capital
     Group entered into several agreements pursuant to which a series of
     transactions will occur, including (i) the merger of VANTAS with and into
     HQ Global, (ii) the acquisition by FrontLine Capital Group of certain
     shares of common stock of HQ Global from the Company and other stockholders
     of HQ Global, and (iii) the acquisition by VANTAS of the Company's debt and
     equity interests in OmniOffices (UK) Limited and OmniOffices (Lux) 1929
     Holding Company S.A. Following the completion of these transactions,
     FrontLine Capital Group will own a substantial majority of the outstanding
     stock of HQ Global, with the Company retaining a minority interest in HQ
     Global.

     HQ Global has $140.5 million outstanding under a $200.0 million credit
     facility with Morgan Guaranty Trust Company ("Morgan") as lead agent. The
     Company unconditionally guarantees this credit facility, and the terms of
     the HQ Global credit facility with respect to interest rate and maturity
     are the same as the terms of the Company's unsecured credit facility with
     Morgan as lead agent. The borrowings outstanding under the HQ Global
     unsecured credit facility are included within net assets of discontinued
     operations in the accompanying balance sheets.


                                       8
<PAGE>

                CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES
            Notes to Consolidated Financial Statements (Continued)
                                  (Unaudited)
- --------------------------------------------------------------------------------

       The assets and liabilities of the executive suites businesses at March
       31, 2000 and December 31, 1999 are as follows (in thousands):

<TABLE>
<CAPTION>
                                                                March 31, 2000        December 31, 1999
                                                                --------------        -----------------
          <S>                                                   <C>                   <C>
          Assets:
             Rental property, net                                    $ 103,313               $ 98,880
             Goodwill, net of accumulated amortization                 250,274                253,050
             Other assets                                               90,558                 87,000
                                                                     ---------               --------
               Total assets                                            444,145                438,930

          Liabilities and other:
             Unsecured credit facility                                 140,500                140,500
             Other liabilities                                          84,412                 81,256
                                                                     ---------               --------
                                                                       224,912                221,756

             Minority interest                                          10,496                 10,560
             Foreign currency translation adjustment                    (1,908)                (1,054)
                                                                     ---------               --------
          Net assets of discontinued operations                      $ 210,645               $207,668
                                                                     =========               ========
</TABLE>


     Executive Suites revenue (included in discontinued operations in the
     statement of operations) represents rental income from executive suites
     customers and income from various services provided to these customers,
     such as, telephone and administrative support. Such revenue is recognized
     as earned. Total revenues for the executive suites operations were $72.1
     million for the three months ended March 31, 2000 compared with $49.1
     million for the three months ended March 31, 1999. The $23.0 million
     revenue increase resulted from an increase in owned centers from 113 at
     March 31, 1999 to 193 at March 31, 2000. The increase in revenue was offset
     by corresponding increases in operating expense, interest expense and
     depreciation and amortization.

     The Company does not expect a loss from disposal of the executive suites
     businesses. The merger is scheduled to close on or before May 31, 2000. The
     proposed transaction is subject to satisfaction of a number of conditions.
     There can be no assurance that the proposed transaction will be
     consummated.

(5)  Gain on Sale of Assets

     The Company has disposed of certain assets that are inconsistent with its
     long-term strategic or return objectives or where market conditions for
     sale are favorable. During the three months March 31, 2000, the Company
     disposed of four operating office properties recognizing gains totaling
     $5.4 million, net of $0.3 million in income taxes. During the three months
     ended March 31, 1999, the Company disposed of 24 operating office
     properties recognizing gains totaling $18.1 million, net of $8.4 million in
     income taxes.

                                       9

<PAGE>

                CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES
            Notes to Consolidated Financial Statements (Continued)
                                  (Unaudited)

(6)  Segment Information

     The Company's reportable operating segments are real estate property
     operations and development operations. Other business activities and
     operating segments that are not reportable are included in other
     operations.

     The Company's operating segments' performances are measured using funds
     from operations. Funds from operations represent net operating income
     before minority interest and extraordinary items, excluding depreciation
     and amortization on real estate assets and discontinued operations, gains
     on treasury locks and gain on sale of assets.

<TABLE>
<CAPTION>
(In millions)                                           For the three months ended
                                                             March 31, 2000
                                       ---------------------------------------------------------
                                       Real Estate
                                        Property      Development         Other
                                       Operations      Operations      Operations       Total
                                       -----------     ----------      ----------     ----------
       <S>                             <C>             <C>             <C>            <C>
       Operating revenue                  $  136.6           1.9            3.1         $  141.6
       Segment expense                        44.2           1.0            8.8             54.0
                                          --------         -----         ------         --------
       Net segment revenue (expense)          92.4            .9           (5.7)            87.6
       Interest expense                       12.8            --           14.1             26.9
       Other income (expense), net             1.2            --             .1              1.3
                                          --------         -----         ------         --------
       Funds from operations              $   80.8            .9          (19.7)            62.0
                                          ========         =====         ======

       Adjustments:

         Depreciation and amortization                                                     (31.1)
                                                                                        --------

       Income from continuing operations
         before gain on sale of assets and
         minority interest                                                                  30.9
       Income taxes,  minority interest and
         gain on sale of assets                                                              2.3
       Discontinued  operations - loss,
         net of income tax                                                                  (1.4)
                                                                                        --------
         Net income                                                                     $   31.8
                                                                                        ========
</TABLE>

                                      10
<PAGE>

                CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES
            Notes to Consolidated Financial Statements (Continued)
                                  (Unaudited)
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
(In millions)                                            For the three months ended
                                                             March 31, 1999
                                             ------------------------------------------------------------
                                              Real Estate
                                               Property      Development        Other
                                              Operations      Operations     Operations      Total
                                              ----------     -----------     ----------     -------
     <S>                                      <C>            <C>             <C>            <C>
     Operating revenue                          $ 121.5          1.4             2.5        $ 125.4
     Segment expense                               40.4           .9             8.4           49.7
                                                -------        -----          ------        -------
     Net segment revenue (expense)                 81.1           .5            (5.9)          75.7
     Interest expense                              12.2           --             9.1           21.3
     Other income (expense), net                    1.3           --              .3            1.6
                                                -------        -----          ------        -------
     Funds from operations                      $  70.2           .5           (14.7)          56.0
                                                =======        =====          ======

     Adjustments:

       Depreciation and amortization                                                          (25.3)
       Gain on treasury locks                                                                   4.5
                                                                                            -------

     Income  from  continuing   operations
       before  gain on sale of assets  and
       minority interest                                                                       35.2
     Income taxes,  minority  interest and                                                     12.3
     Discontinued  operations - loss,  net
       of income tax                                                                           (1.3)
                                                                                            -------
            Net income                                                                      $  46.2
                                                                                            =======
</TABLE>

                                      11

<PAGE>

          Management's Discussion and Analysis of Financial Condition
                   and Results of Operations of the Company
- --------------------------------------------------------------------------------

Item 2.     Management's Discussion and Analysis of Financial Condition and
Results of Operations

     The following discussion is primarily based on the Consolidated Financial
Statements of CarrAmerica Realty Corporation and its subsidiaries (the
"Company") as of March 31, 2000 and December 31, 1999, and for the three months
ended March 31, 2000 and 1999. The comparability of the periods is impacted by
acquisitions completed, development properties placed in service and
dispositions made during 2000 and 1999. As of March 31, 1999, the Company owned
273 properties. This number increased to 282 at March 31, 2000.

     The Company's reportable operating segments are real estate property
operations and development operations. Development operations are primarily
third-party development fee income and associated expenses. Other business
activities and operating segments that are not reportable are included in other
operations. Executive office suites are presented as discontinued operations.

     This information should be read in conjunction with the accompanying
consolidated financial statements and notes thereto. These consolidated
financial statements include all adjustments, which are, in the opinion of
management, necessary to reflect a fair statement of the periods presented, and
all such adjustments are of a normal, recurring nature.

RESULTS OF OPERATIONS - Three Months Ended  March 31, 2000 and 1999

Real Estate Property Operations

     Total real estate property operating revenue increased $15.1 million, or
12.4%, to $136.6 million for the three months ended March 31, 2000, compared to
$121.5 million for the three months ended March 31, 1999. This increase resulted
from development properties placed in service and same store rental growth which
exceeded the loss of rental revenue due to dispositions. Same store net
operating income in 2000 grew by 11.3% or $7.1 million over the same period in
1999, as a result of a 8.1% increase in rental revenue. This increase was driven
by an increase in average rental rates primarily in San Francisco Bay area
properties. The occupancy rate for same store properties increased to 97.0% for
the first quarter of 2000 from 96.6% for the first quarter of 1999.

     Real estate property operating expenses increased $3.8 million primarily as
a result of development properties placed in service. Same store operating
expenses in 2000 decreased by $0.4 million or 1.4% over the first quarter of
1999. Interest expense increased by $0.6 million over the three months ended
March 31, 1999 primarily as a result of an increase in borrowings offset
partially by lower interest rates on refinanced mortgages.

Development Operations

          Development fee income increased $0.5 million to $1.9 million and
development operating expenses increased $0.1 million to $1.0 million for the
first quarter of 2000. These increases are the result of an increase in the
number of development fee projects the Company manages.

Other Operations

     Operating revenues increased $0.6 million for the three months ended March
31, 2000 compared to the same period in 1999 primarily from increases in leasing
fees and other service income.

     Other operations expenses increased $0.4 million primarily as a result of
professional fees associated with the Company's Project Excellence program. The
project's mission is primarily to examine the Company's current finance,
technology and business processes in order to identify and implement changes
needed to improve these processes to the level of best practice.

                                      12
<PAGE>

          Management's Discussion and Analysis of Financial Condition
                   and Results of Operations of the Company
- --------------------------------------------------------------------------------

     Interest expense increased $5.0 million or 55% to $14.1 million compared to
$9.1 million in 1999. This was primarily due to a $4.8 million decrease in
capitalizable interest for the three months ended March 31, 2000 as compared to
1999.

Discontinued Operations

Loss from operations of discontinued executive suites businesses was $1.4
million for 2000 versus $1.3 million reported for the three months ended March
31, 1999.

LIQUIDITY AND CAPITAL RESOURCES

     The Company seeks to create and maintain a capital structure that will
enable it to diversify its capital sources and thereby allow the Company to
obtain additional capital from a number of different sources, including
additional equity offerings of common and/or preferred stock, public and private
debt financings, and, where appropriate, asset dispositions. Management believes
that the Company will have access to the capital resources necessary to expand
and develop its business, to fund its operating and administrative expenses, to
continue debt service obligations, to pay dividends in accordance with REIT
requirements, to acquire additional properties and land as market conditions
permit, and to pay for construction in progress in both the short and long term.

     The Company's debt and preferred stock offerings have been rated by three
rating agencies. Duff & Phelps Credit Rating Co. (DCR) and Standard & Poors
(S&P) have each assigned their BBB rating to senior unsecured debt offerings of
the Company and their BBB- rating to cumulative preferred stock offerings of the
Company. Moody's Investor Service (Moody's) has assigned its Baa3 rating to
senior unsecured debt offerings of the Company and its Ba2 rating to cumulative
preferred stock offerings of the Company.

     The Company's total indebtedness, excluding discontinued operations, at
March 31, 2000 was approximately $1.6 billion, of which $353 million, or 22%,
bore a LIBOR-based floating interest rate. The Company's mortgages payable fixed
rate indebtedness bore an effective weighted average interest rate of 8.0% at
March 31, 2000 and had a weighted average term to maturity of 6.7 years. Based
upon the Company's total market capitalization at March 31, 2000 of $3.6 billion
(the common stock price was $21.25 per share; the total shares of common stock,
convertible preferred stock and Units outstanding was approximately 73,987,000
and the aggregate liquidation value of the cumulative redeemable preferred stock
was $400 million), the Company's debt represented 45% of its total market
capitalization. The Company has a $450.0 million unsecured credit facility, of
which $353.0 million had been advanced, letters of credit totaling $3.7 million
were issued, and $93.3 million was available for draw. HQ Global has a $200.0
million unsecured credit facility, which is guaranteed by the Company. As of
March 31, 2000, $140.5 million had been advanced, letters of credit totaling
$10.8 million were issued, and $48.7 million was available for draw. It is
contemplated that the HQ Global facility will be repaid and terminated in
connection with the proposed HQ Global/VANTAS transaction.

     Rental revenue and real estate service revenue have been the principal
sources of cash to fund the Company's operating expenses, debt service and
routine capital expenditures. The Company and its affiliates also require
capital to invest in their existing portfolio of operating assets for major
capital projects such as large-scale renovations and tenant related capital
expenditures, such as tenant improvements and allowances and leasing
commissions. The Company believes that these sources of revenue will continue to
provide the funds necessary for these expenditures.

     Additionally, the Company and its affiliates (including CarrAmerica
Development, Inc.) will require a substantial amount of capital for development
projects currently underway and planned for the future. As of March 31, 2000,
the Company had approximately 954,000 square feet of office space in 16
development projects under construction which are expected to require a total
investment by the Company of approximately $166 million. As of March 31, 2000,
the Company had expended $75.3 million, or 45 percent of the total expected
investment. In addition, CarrAmerica Development has made commitments of $170.0
million for new development projects that will commence construction in 2000.

                                      13

<PAGE>

          Management's Discussion and Analysis of Financial Condition
                   and Results of Operations of the Company
- --------------------------------------------------------------------------------

     Prior to the second quarter of 1998, the Company met its capital
requirements primarily by accessing the public equity and debt capital markets.
As a general matter, conditions in the public equity and debt capital markets
for most REITs have not been favorable since that time. In response to these
unfavorable conditions, the Company has curtailed its acquisition program and
satisfied its cash needs through the disposition of selected assets, the
refinancing of selected assets, prudent use of joint ventures that reduce the
Company's investment requirement and utilization of the Company's existing
credit facilities.

     During the first quarter of 2000, the Company disposed of four operating
properties, generating net proceeds of $32.7 million. As of May 10, 2000, the
Company has three projects under contract for sale which are projected to
produce net proceeds of $36.8 million of which $27.6 million is projected for
the second quarter 2000. Due to uncertainties in the disposition process, there
can be no assurance that these sales will close or that they will achieve the
expected net proceeds.

     As a result of the Company's disposition and refinancing efforts, the
Company believes that funding is available for all capital requirements through
the end of 2000, including firm commitments for development projects. The
Company expects to continue to rely on cash flow from operations, asset
dispositions, asset refinancings, joint ventures and access to its credit
facilities to fund capital requirements for the foreseeable future.

     Net cash provided by operating activities was $60.9 million for the three
months ended March 31, 2000, compared to $38.7 million for the three months
ended March 31, 1999. The increase of $22.2 million in net cash provided by
operating activities resulted primarily from the timing of payments for accounts
payable and rents received in advance. The Company's investing activities used
$20.5 million for the three months ended March 31, 2000 compared to the
Company's investing activities providing $145.3 million for the three months
ended March 31, 1999. The Company's investment activities included sales of
office buildings and land acquired for future development and additions to
construction in progress. Net proceeds from the sales of rental property was
$32.7 million for the three months ended March 31, 2000, compared to $253.8
million for the three months ended March 31, 1999. The Company invested
approximately $51.8 million in acquisitions and improvements to existing real
estate assets, acquisition and development of executive suites assets and
additions to land held for development and construction in progress for the
three months ended March 31, 2000 compared to $107.6 million for the comparable
period of 1999.

     Net of dividends paid and distributions to minority interests, the
Company's financing activities provided net cash of $6.5 million for the three
months ended March 31, 2000 compared to net cash used of $132.3 million for the
three months ended March 31, 1999. During the three months ended March 31, 1999,
the Company repurchased 5,000,000 common shares issued in its forward equity
sale transaction for $109.7 million. Proceeds from the sale of rental properties
were used to fund this transaction and to repay amounts on the unsecured credit
facility. For the three months ended March 31, 2000, the Company's net
borrowings on its unsecured credit facility were $10.0 million as compared to
net repayments of $65.0 million for the comparable period of 1999.

     The Company's dividends are paid quarterly. Amounts accumulated for
distribution are primarily invested by the Company in short-term investments
that are collateralized by securities of the United States Government or certain
of its agencies.

                                      14

<PAGE>

          Management's Discussion and Analysis of Financial Condition
                   and Results of Operations of the Company
- --------------------------------------------------------------------------------

Funds From Operations

     The Company believes that funds from operations (FFO) is helpful to
investors as a measure of the performance of an equity REIT because, along with
cash flow from operating activities, financing activities and investing
activities, it provides investors with an indication of the ability of the
Company to incur and service debt, to make capital expenditures and to fund
other cash needs. In accordance with the National Association of Real Estate
Investment Trusts (NAREIT) White Paper on funds from operations as approved by
the Board of Governors of NAREIT, funds from operations represents net income
(loss) (computed in accordance with generally accepted accounting principles),
excluding gains (or losses) from debt restructuring or sales of property, plus
depreciation and amortization of assets uniquely significant to the real estate
industry and after adjustments for unconsolidated partnerships and joint
ventures. Adjustments for unconsolidated partnerships and joint ventures are
calculated to reflect funds from operations on the same basis. The Company's
funds from operations may not be comparable to funds from operations reported by
other REITs that do not define the term in accordance with the current NAREIT
definition or that interpret the current NAREIT definition differently than the
Company. NAREIT's definition for FFO excludes discontinued operations, however,
the Company has elected to calculate FFO from discontinued operations of the
Company's executive suites businesses. FFO for discontinued operations includes
executive suites earnings before depreciation, amortization and deferred taxes
("EBDADT"). The Company has restated the prior year to conform with the current
year presentation which excludes the add back of development losses associated
with the Company's executive suites business. The Company continues to exclude
the gain on settlement of treasury locks for the restated 1999 FFO. Funds from
operations does not represent net income or cash flow generated from operating
activities in accordance with generally accepted accounting principles and, as
such, should not be considered an alternative to net income as an indication of
the Company's performance or to cash flow as a measure of liquidity or the
Company's ability to make distributions.

The following table provides the calculation of the Company's funds from
operations for the period presented:

<TABLE>
<CAPTION>
  (In thousands)                                                                Three Months Ended
                                                                                     March 31,
                                                                             ------------------------
                                                                               2000            1999
                                                                               ----            ----
  <S>                                                                        <C>            <C>
  Net income from continuing operations before minority interest             $   36,207     $   53,182

  Adjustments to derive funds from continuing operations:
      Add depreciation and amortization                                          31,442         25,366
      Deduct:
        Minority interests' (non Unitholders) share of depreciation,
         Amortization and net income                                               (255)           (49)
        Gain on settlement of treasury locks                                        ---         (4,489)
        Gain on sale of assets                                                   (5,354)       (18,055)
                                                                             ----------     ----------
  Funds from continuing operations before allocations to the minority
      Unitholders                                                                62,040         55,955

  Less funds from continuing operations allocable to the minority
      Unitholders                                                                (4,437)        (4,166)
                                                                             ----------     ----------

  Funds from continuing operations allocable to CarrAmerica Realty
    Corporation                                                                  57,603         51,789

  Less preferred stock dividends                                                 (8,777)        (8,745)
                                                                             ----------     ----------
  Funds from continuing operations attributable to common shareholders           48,826         43,044
                                                                             ----------     ----------
  Discontinued operations                                                         4,895          3,086
                                                                             ----------     ----------
  Funds from operations attributable to common shareholders                  $   53,721     $   46,130
                                                                             ==========     ==========
</TABLE>

                                      15

<PAGE>

          Management's Discussion and Analysis of Financial Condition
                   and Results of Operations of the Company
- --------------------------------------------------------------------------------

FORWARD-LOOKING STATEMENTS

     Certain statements contained herein constitute "forward-looking statements"
within the meaning of the Private Securities Litigation Reform Act of 1995 (the
"Reform Act"). Such forward-looking statements involve known and unknown risks,
uncertainties and other factors that may cause the actual results, performance
or achievements of the Company and its affiliates or industry results to be
materially different from any future results, performance or achievements
expressed or implied by such forward-looking statements. Such factors include,
among others, the following: national and local economic, business and real
estate conditions that will, among other things, affect demand for office
properties, availability and creditworthiness of tenants, the level of lease
rents and the availability of financing for both tenants and the Company,
adverse changes in the real estate markets, including, among other things,
competition with other companies, risks of real estate acquisition and
development (including the failure of pending acquisitions to close and pending
developments to be completed on time and within budget), actions, strategies and
performance of affiliates that the Company may not control, governmental actions
and initiatives, and environmental/safety requirements.

                                      16

<PAGE>

          Management's Discussion and Analysis of Financial Condition
                   and Results of Operations of the Company
- --------------------------------------------------------------------------------

Item 3.  Quantitative and Qualitative Disclosures About Market Risk

     No material changes in the Company's market risk have occurred since the
filing of the Company's Annual Report on Form 10-K for the year ended December
31, 1999.

                                      17

<PAGE>

                                    Part II

OTHER INFORMATION
- -----------------

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

          None

Item 6. Exhibits and Reports on Form 8-K

        (a.)   Exhibits

               10.1   Agreement and Plan of Merger by and among HQ Global
                      Workplaces, Inc., the Company, VANTAS Incorporated and
                      Reckson Service Industries, Inc., dated as of January 20,
                      2000 (incorporated by reference to Exhibit 10.1 to the
                      Company's Current Report on Form 8-K filed on February 3,
                      2000) (the "Merger Agreement").

               10.2   Form of Stockholders Agreement among Reckson Service
                      Industries, Inc., HQ Global Workplaces, Inc., the Company
                      and the other parties named therein (incorporated by
                      reference to Exhibit 10.2 to the Company's Current Report
                      on Form 8-K filed on February 3, 2000).

               10.3   Stock Purchase Agreement between the Company and Reckson
                      Service Industries, Inc., dated as of January 20, 2000
                      (incorporated by reference to Exhibit 10.3 to the
                      Company's Current Report on Form 8-K filed on February 3,
                      2000) (the "Stock Purchase Agreement").

               10.4   Stock Purchase Agreement among the Company, OmniOffices
                      (UK) Limited, OmniOffices (Lux) 1929 Holding Company S.A.,
                      VANTAS Incorporated and Reckson Service Industries, Inc.,
                      dated as of January 20, 2000 (incorporated by reference to
                      Exhibit 10.4 to the Company's Current Report on Form 8-K
                      filed on February 3, 2000) (the "UK Agreement").

               10.5   Form of Indemnification and Escrow Agreement by and among
                      Reckson Service Industries, Inc., the Company and the
                      other parties named therein (incorporated by reference to
                      Exhibit 10.5 to the Company's Current Report on Form 8-K
                      filed on February 3, 2000).

               10.6   First Amendment to Merger Agreement, dated as of April
                      29, 2000.

               10.7   First Amendment to Stock Purchase Agreement, dated as of
                      April 29, 2000.

               10.8   First Amendment to UK Agreement, dated as of April 29,
                      2000.

                 27   Financial Data Schedule - Three Months Ended March 31,
                      2000.

        (b.)   Reports on Form 8-K

               a.  Current Report on Form 8-K filed on February 3, 2000
                   regarding a proposed transaction involving the Company's
                   executive suites affiliates HQ Global Workplaces, Inc.,
                   OmniOffices (UK) Limited and OmniOffices (Lux) 1929 Holding
                   Company S.A.

               b.  Current Report on Form 8-K filed on February 14, 2000, as
                   amended by a Current Report on Form 8-K/A filed on February
                   17, 2000 and a Current Report on Form 8-K/A filed on February
                   23, 2000, regarding certain supplemental data included in the
                   Company's press release dated February 4, 2000.

                                      18

<PAGE>

                                  SIGNATURES

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.


CARRAMERICA REALTY CORPORATION


/s/ Thomas A. Carr
_______________________________________________________
Thomas A. Carr, President and Chief Executive Officer


/s/ Richard F. Katchuk
_______________________________________________________
Richard F. Katchuk, Chief Financial Officer


/s/ Stephen E. Riffee
_______________________________________________________
Stephen E. Riffee, Senior Vice President, Controller and Treasurer
(Principal Accounting Officer)


Date: May 12, 2000

                                      19
<PAGE>

                                  Exhibit Index
                                  -------------

Exhibit    Description                                                      Page
- -------    -----------                                                      ----

10.6       First Amendment to Merger Agreement, dated as of April 29, 2000

10.7       First Amendment to Stock Purchase Agreement, dated as of April
           29, 2000

10.8       First Amendment to UK Agreement, dated as of April 29, 2000

  27       Financial Data Schedule - Three Months Ended March 31, 2000.

                                      20


<PAGE>

                                                                    Exhibit 10.6

                FIRST AMENDMENT TO AGREEMENT AND PLAN OF MERGER

          THIS FIRST AMENDMENT TO AGREEMENT AND PLAN OF MERGER (this
"Amendment") is entered into as of April 29, 2000 by and among VANTAS
Incorporated, a Nevada corporation ("VANTAS"), and FrontLine Capital Group, a
Delaware corporation (formerly known as Reckson Services Industries, Inc.)
("RSI"), on the one hand, and HQ Global Workplaces, Inc., a Delaware corporation
(the "Company"), and CarrAmerica Realty Corporation, a Maryland corporation
("CarrAmerica"), on the other hand.

                              W I T N E S S E T H
                              - - - - - - - - - -

          WHEREAS, VANTAS and RSI, on the one hand, and the Company and
CarrAmerica, on the other hand, have executed the Agreement and Plan of Merger
dated as of January 20, 2000 (such agreement, as heretofore, hereby or
hereinafter amended, the "Merger Agreement") pursuant to which VANTAS is to
merge with and into the Company, with the Company being the Surviving
Corporation;

          WHEREAS, VANTAS, RSI, the Company and CarrAmerica have executed an
Agreement dated as of March 13, 2000, as amended, pursuant to which such parties
agreed to authorize certain actions governed by the Merger Agreement;

          WHEREAS, the parties hereto wish to amend the Merger Agreement as
provided herein; and

          WHEREAS, capitalized terms used herein but not defined herein shall
have the meanings ascribed to such terms in the Merger Agreement.

          NOW, THEREFORE, in consideration of the aforesaid and the respective
representations, warranties, covenants and agreements hereinafter set forth, the
parties, intending to be legally bound, agree as follows:

A.        AMENDMENTS TO MERGER AGREEMENT

          The Merger Agreement is hereby amended as follows:

          1.   The fifth WHEREAS clause of the Merger Agreement is hereby
deleted in its entirety and replaced by the following:

          "WHEREAS, immediately following the consummation of the HQ Merger and
          the transactions contemplated by the Stock Purchase Agreement and the
          UK Agreement, the Company (being sometimes
<PAGE>

          referred to as the "HQ Surviving Corporation" following the HQ Merger)
          will merge (the "Second Step Merger") with and into a to-be formed
          Delaware corporation ("M Sub") that will be a wholly-owned subsidiary
          of another to-be formed Delaware corporation ("Holdco"), which will be
          wholly-owned by the Company, pursuant to the terms and conditions of
          an Agreement and Plan of Merger (the "Second Step Plan of Merger"),
          substantially in the form of Exhibit A to this Agreement, with M Sub
                                       ---------
          being the surviving corporation (being sometimes referred to as the
          "Second Step Surviving Corporation") in the Second Step Merger."

          2.     The reference to "Holdco" in the first sentence of Section 4(c)
of the Merger Agreement is hereby deleted and replaced with "Holdco or M Sub."

          3.     The second sentence of Section 4(d) of the Merger Agreement is
hereby deleted in its entirety and replaced by the following:

          "Except as set forth on Schedule 4(d), upon the filing of the
          Recapitalization Amendments and immediately prior to the Effective
          Time, the authorized capital stock of the Company shall consist of
          75,000,000 shares of Voting Common Stock, 25,000,000 shares of Non-
          Voting Common Stock and 7,800,00 shares of preferred stock (the
          "Company Preferred Stock"), of which an aggregate of 7,359,526 shares
          of Voting Common Stock and Non-Voting Common Stock will be duly
          authorized and validly issued and outstanding, fully paid and
          nonassessable."

          4.     Section 4(bb) of the Merger Agreement is hereby deleted in its
entirety and replaced by the following:

          "(bb)  Immediately prior to the Effective Time, each of M Sub and
          Holdco will be a corporation duly organized, validly existing and in
          good standing under the laws of Delaware. The authorized capital stock
          of M Sub will consist of 1,000 shares of voting common stock, par
          value $.01 per share (the "M Sub Voting Common Stock"), of which 1,000
          shares of M Sub Voting Common Stock will be duly authorized for
          issuance, and upon such issuance will be validly issued and
          outstanding, fully paid and nonassessable. All such issued and
          outstanding shares of M Sub Voting Common Stock will be owned as of
          record by Holdco. The authorized capital stock of Holdco will consist
          of 75,000,000 shares of voting common stock, par value $.01 per share
          ("Holdco Voting Common Stock"), 25,000,000 shares of Class C

                                      -2-
<PAGE>

          convertible non-voting common stock, par value $.01 per share ("Holdco
          Non-Voting Common Stock") and 7,800,000 shares of preferred stock, par
          value $.01 per share ("Holdco Preferred Stock"), and the shares of
          Holdco capital stock issued pursuant to the Second Step Merger will be
          validly issued and outstanding, fully paid and nonassessable. Prior to
          the effective time of the Second Step Merger, only Holdco Voting
          Common Stock will be issued and outstanding and all of such
          outstanding shares will be owned of record by the Company."

          5.    Section 6(i) of the Merger Agreement is hereby deleted in its
entirety and replaced by the following:

          "(ii) M Sub and Holdco.  The Company shall cause the formation of
                ----------------
          each of Holdco and M Sub by filing with the Secretary of State of the
          State of Delaware a certificate of incorporation in substantially the
          form of Exhibit K-1 to this Agreement for Holdco (the "Holdco
                  -----------
          Charter") and a certificate of incorporation for M Sub (the "M Sub
          Charter") in substantially the form of Exhibit K-2 to this Agreement,
                                                 -----------
          and shall cause each of M Sub and Holdco to adopt by-laws, in
          substantially the form of Exhibits K-3 and K-4, respectively, to this
                                    --------------------
          Agreement.  The Company shall cause M Sub and Holdco to have a
          sufficient number of shares of M Sub Voting Common Stock, Holdco
          Voting Common Stock and Holdco Non-Voting Common Stock to be
          authorized and unissued to effectuate the terms and conditions of the
          Second Step Merger.  The Company shall cause Holdco to have a
          sufficient number of shares of the Holdco Preferred Stock (the terms
          and conditions of such Holdco Preferred Stock being set forth in the
          Holdco Charter) authorized and unissued to effectuate the terms and
          conditions of the exchange contemplated by the term sheet contained in
          the Financing Exhibits (as defined herein).  Other than (i) the shares
          of M Sub Voting Common Stock issued to Holdco, (ii) the shares of
          Holdco Voting Common Stock issued to the Company, and (iii) the shares
          of Holdco Voting Common Stock and Holdco Non-Voting Common Stock to be
          issued in the Second Step Merger, the Company shall cause no
          additional shares of M Sub Voting Common Stock, Holdco Voting Common
          Stock, Holdco Non-Voting Common Stock or Holdco Preferred Stock to be
          issued by M Sub or Holdco prior to Closing."

          6.    Section 7(k) of the Merger Agreement is hereby deleted in its
entirety and replaced by the following:

                                      -3-
<PAGE>

          "Upon consummation of the HQ Merger, the UK Agreement and the Stock
          Purchase Agreement, the HQ Surviving Company shall make the necessary
          filings with the Secretary of State of the State of Delaware as
          contemplated by Section 251(g) of the Delaware General Corporation Law
          to effect the merger of HQ Global with and into M Sub."

          7.    Section 9(b)(iv) of the Merger Agreement is hereby deleted in
its entirety and replaced by the following:

                "The Indemnification and Escrow Agreement, by and among certain
          stockholders, warrantholders and optionees who are electing to sell at
          least 4,000 options to purchase shares of common stock of the Company
          who hold their shares, warrants or options in the Company immediately
          prior to Closing, RSI and such escrow agent as shall be mutually
          agreed to by the parties (the "Indemnification Escrow Agent"),
          substantially in the form of Exhibit E hereto (the "Indemnification
                                       ---------
          Escrow Agreement"), shall have been duly executed and delivered by
          such stockholders, warrantholders and optionees, RSI and the
          Indemnification Escrow Agent and the shares required to be delivered
          by RSI pursuant thereto shall have been delivered to the
          Indemnification Escrow Agent pursuant thereto."

          8.    Section 9(b)(vii) of the Merger Agreement is hereby deleted in
its entirety and replaced by the following:

          "The Registration Rights Agreement by and among RSI and certain
          holders of shares in Holdco, substantially in the form of Exhibit H
                                                                    ---------
          hereto (the "RSI Registration Rights Agreement"), shall have been
          executed at the Closing."

          9.    Section 9(b)(xi) of the Merger Agreement is hereby deleted in
its entirety and replaced by the following:

          "(xi) Reckson Associates Realty Corp. ("RA"), or an affiliate
          thereof, and RSI, as the case may be, shall have executed and
          delivered the RA/RSI Intercompany Agreements, substantially in the
          form of Exhibits J-1, J-2, and J-3, respectively, to this Agreement
                  --------------------------
          (collectively, the "RSI Intercompany Agreements")."

          10.   The number "3,000,000" in Section 9(c)(xiv) of the Merger
Agreement is hereby deleted and replaced with the number "5,100,000."

                                      -4-
<PAGE>

          11.  All references to "April 30, 2000" in Sections 14(a)(ii),
14(a)(v) and 14(a)(vi) of the Merger Agreement are hereby replaced with "May 31,
2000."

          12.  All references to "May 1, 2000" in Section 14(a)(ii) of the
Merger Agreement are hereby replaced with "June 1, 2000."

          13.  All references to "May 15, 2000" in Section 14(d) of the Merger
Agreement are hereby replaced with "June 15, 2000."

B.        AMENDMENTS TO FORM EXHIBITS AND DISCLOSURE SCHEDULES

          The forms of agreements attached as exhibits to the Merger Agreement
and the Disclosure Schedules attached to the Merger Agreement hereby are amended
as follows:

          1.   Exhibit A to the Merger Agreement is hereby deleted in its
               ---------
entirety and replaced by Exhibit A attached to this Amendment.
                         ---------

          2.   Exhibit C to the Merger Agreement is hereby deleted in its
               ---------
entirety.

          3.   The preamble of the form of Stockholders Agreement attached to
the Merger Agreement as Exhibit D (the "Stockholders Agreement") is hereby
                        ---------
deleted in its entirety and replaced by the following:

          "THIS STOCKHOLDERS AGREEMENT (this "Agreement"), dated as of
          _________, 2000, is made by and among FrontLine Capital Group
          (formerly known as Reckson Services Industries, Inc.) ("RSI"), HQ
          Global Holdings, Inc. (the "Company"), CarrAmerica Realty Corporation
          ("CarrAmerica" or the "Designated Holder") and the undersigned holders
          of common stock of the Company (the "Common Stock") (together with
          CarrAmerica, the "Holders")."

          4.   The first WHEREAS clause of the Stockholders Agreement is hereby
deleted in its entirety and replaced by the following:

          "WHEREAS, RSI and [the/certain] Holders have entered into that certain
          Stock Purchase Agreement dated as of January 20, 2000 pursuant to
          which RSI is acquiring on the date hereof certain shares of common
          stock of HQ Global Workplaces, Inc. ("HQ Global") owned by such
          Holders (the "Transaction");"

                                      -5-
<PAGE>

          5.   Clause 7.1(a)(iii) of the Stockholders Agreement is hereby
deleted in its entirety and replaced by the following:

          "the highest price per share of Common Stock (or the implied value of
          the Common Stock in connection with the issuance of any convertible
          security of the Company) (subject to future adjustment in the event of
          stock splits, stock dividends and other similar events) received by
          RSI or the Company in any sale or issuance thereof (i) in connection
          with the Transaction or (ii) from and after the date hereof through
          the last day of the 2000 Put Period."

          6.   The preamble of the form of Indemnification and Escrow Agreement
attached to the Merger Agreement as Exhibit E (the "Indemnification Agreement')
                                    ---------
is hereby deleted in its entirety and replaced by the following:

          "THIS INDEMNIFICATION AND ESCROW AGREEMENT (this "Agreement") is
          entered into as of the _______ day of _________ by and among FrontLine
          Capital Group (formerly known as Reckson Services Industries, Inc.), a
          Delaware corporation ("RSI"), CarrAmerica Realty Corporation, a
          Maryland corporation ("CarrAmerica"), and [other shareholders,
          warrantholders and optionees of HQ Global Workplaces, Inc. to be added
          per CarrAmerica' instructions, collectively the "Shareholders" and
          individually a "Shareholder")] and ___________, a ______ corporation,
          as escrow agent (the "Escrow Agent") hereunder."

          7.   The second, third and fourth WHEREAS clauses of the
Indemnification Agreement are hereby deleted in their entirety and replaced by
the following:

          "WHEREAS, on the date hereof, pursuant to an agreement among
          [the/certain] Shareholders and RSI dated as of January __, 2000 (the
          "Stock Purchase Agreement"), [certain/each] of the Shareholders are
          selling to RSI, and RSI is purchasing from such Shareholders, that
          number of the shares of voting common stock, par value $.01 per share,
          and non-voting common stock, par value $.01 per share, of HQGW as set
          forth in, and subject to the terms and conditions of, the Stock
          Purchase Agreement for $____ per share in cash for an aggregate
          purchase price of $______ (the "Share Consideration");

          WHEREAS, on the date hereof, pursuant to the Merger Agreement, each
          issued and outstanding share of (A) common stock, par value $.01 per
          share ("VANTAS Common Stock"), of VANTAS shall be converted into the
          right to receive $_____ per share in cash and (B) (i) Series A

                                      -6-
<PAGE>

          Convertible Preferred Stock, par value $.01 per share, of VANTAS (the
          "Series A Stock"), (ii) Series B Convertible Preferred Stock, par
          value $.01 per share, of VANTAS (the "Series B Stock"), (iii) Series C
          Convertible Preferred Stock, par value $.01 per share, of VANTAS (the
          "Series C Stock"), (iv) Series D Convertible Preferred Stock, par
          value  $.01 per share, of VANTAS (the "Series D Stock"), and (v)
          Series E Convertible Preferred Stock, par value $.01 per share of
          VANTAS (the "Series E Stock"), other than shares of Series A Stock,
          Series B Stock, Series C Stock, Series D Stock and Series E Stock held
          in the treasury of VANTAS, are, by virtue of the Merger and without
          any  action on the part of the holder thereof, being converted into
          the right to receive ______ shares of voting common stock of HQGW
          ("VANTAS' Share Consideration");

          WHEREAS, as a condition to the consummation by VANTAS and/or RSI, as
          applicable, of the transactions contemplated by the Merger Agreement,
          the Stock Purchase Agreement, and that certain Stock Purchase
          Agreement by and among VANTAS, RSI, CarrAmerica, OmniOffices (UK)
          Limited ("Omni UK") and OmniOffices (Lux) 1929 Holding Company S.A.
          ("LuxCo") (the "UK Agreement"), (i) the Shareholders have hereby
          agreed to indemnify and hold harmless RSI from and against certain
          losses related to the Merger Agreement and the Stock Purchase
          Agreement, and (ii) CarrAmerica has hereby agreed to indemnify and
          hold harmless RSI from and against certain losses related to the UK
          Agreement, upon the terms and conditions provided herein;"

          8.   The sixth and seventh WHEREAS clauses of the Indemnification
Agreement are hereby deleted in their entirety and replaced by the following:

          "WHEREAS, in connection with the Shareholders' indemnification
          obligations, the parties have agreed that the Shareholders are
          depositing an aggregate of ___ shares of voting common stock of Holdco
          (the "Voting Common Stock") and ____ shares of non-voting common stock
          of Holdco (the "Non-Voting Common Stock") (collectively, the
          "Shareholder Indemnification Shares") and $____________ in cash (the
          "Shareholder Cash Collateral") with the Escrow Agent to be held and
          disbursed by the Escrow Agent in accordance with this Agreement, with
          such Shareholder Indemnification Shares and Shareholder Cash
          Collateral having an aggregate initial value of $30,000,000 as of the
          Closing;

                                      -7-
<PAGE>

          WHEREAS, in connection with RSI's indemnification obligations, the
          parties have agreed that RSI is depositing an aggregate of ___ shares
          of Voting Common Stock (the "RSI Indemnification Shares," and together
          with the Shareholder Indemnification Shares, the "Indemnification
          Shares") with the Escrow Agent to be held and disbursed by the Escrow
          Agent in accordance with this Agreement, with the RSI Indemnification
          Shares having an aggregate initial value of $30,000,000 as of the
          Closing;"

          9.   All references to "Surviving Corporation" in the definition of
"Direct Loss" set forth in Section 1 and in Section 2(a) of the Indemnification
Agreement are hereby changed to "Holdco."

          10.  All references to "Surviving Corporation" or "Surviving Company"
set forth in Sections 5(a), 6(a), 6(b), 6(c), 6(d) and 7(b) of the
Indemnification Agreement are hereby changed to "Second Step Surviving
Corporation."

          11.  All references to "HQGW" in Section 2(a) of the Indemnification
Agreement are hereby changed to "Holdco."

          12.  Section 3 of the Indemnification Agreement is hereby amended by
adding the following subparagraph (d):

          "RSI shall indemnify each of the Shareholder Indemnitees for any Extra
          Tax Costs incurred by such Shareholder Indemnitees in connection with
          the HQ Merger, the Second Step Merger, and/or the sale of shares by
          such Shareholder Indemnitee pursuant to the Stock Purchase Agreement.
          For purposes of this Section 3(d), "Extra Tax Costs" shall be defined
          as (i) all interest, penalties, and similar charges actually payable
          by a Shareholder Indemnitee to any applicable taxing authority with
          respect to Extra Taxes attributable to the period ending on the
          earlier of January 1, 2003 or the date all of such Shareholder
          Indemnitee's shares of stock in HQGW not sold pursuant to the Stock
          Purchase Agreement actually are sold (in either case, the "Deemed Sale
          Date"), plus (ii) in the event that such interest, penalties, and
          similar charges have not been paid on or prior to the Deemed Sale
          Date, all interest, penalties and similar charges accruing with
          respect to such interest, penalties and similar charges until the
          earlier of the actual date on which the interest, penalties, and
          similar charges described in clause (i) are paid or thirty (30) days
          following a "final determination" within the meaning of Section 1313
          of the Code that the Shareholder Indemnitee is required to pay Extra
          Taxes, plus (iii) if

                                      -8-
<PAGE>

          and to the extent that a Shareholder Indemnitee is required to pay any
          Extra Taxes prior to the applicable Deemed Sale Date, interest on such
          Extra Taxes from the date the Shareholder Indemnitee makes such
          payment of Extra Taxes to and including the applicable Deemed Sale
          Date, computed at a rate equal to the rate applicable under Section
          6621 of the Code with respect to underpayments of federal income tax,
          plus (iv) an amount equal to all federal, state and local income taxes
          (net of the federal income tax benefit, if any, resulting to the
          Shareholder Indemnitee from any deduction allowed to such Shareholder
          Indemnitee for any such state and local income taxes) required to be
          paid by such Shareholder Indemnitee with respect to the payment
          received pursuant to this Section 3(d). For purposes of this Section
          3(d), "Extra Taxes" shall be defined as the excess of (i) the amount
          of all Taxes (other than stock transfer Taxes) payable (determined as
          described below) by a Shareholder Indemnitee by reason of the Second
          Step Merger and/or the sale of shares of stock by the Shareholder
          Indemnitee pursuant to the Stock Purchase Agreement over (ii) the
          amount of Taxes (other than stock transfer Taxes) that would have been
          payable by such Shareholder Indemnitee by such reason if (a) the
          exchange into Holdco Preferred Stock described on the Financing
          Exhibits were not to have taken place and (b) the surviving
          corporation in the Second Step Merger were the HQ Surviving
          Corporation rather than M Sub. The amount of Extra Taxes and the Extra
          Tax Costs for purposes of this Section 3(d) shall be determined and
          certified to by an independent accountant selected by the applicable
          Shareholder Indemnitee, as may be reasonably acceptable to RSI. Extra
          Taxes and Extra Tax Costs shall be considered payable for the purposes
          hereof on the earlier of (i) the date on which the Shareholder
          Indemnitee notifies RSI in writing of any assertion by the Internal
          Revenue Service, formal or informal, of a position to the effect that
          such amounts might be required to be paid, or (ii) the date on which
          the Shareholder Indemnitee delivers to RSI a copy of an opinion of the
          tax advisor to such Indemnitee providing that it is more likely than
          not that the Shareholder Indemnitee is liable for such Extra Taxes and
          Extra Tax Costs (in either case, a "Potential Adverse Determination
          Date"), unless in either event RSI notifies such Shareholder
          Indemnitee in writing within ten days of the Potential Adverse
          Determination Date that, pursuant to the provisions of this section,
          it will indemnify the Shareholder Indemnitee for (a) all interest,
          penalties, and similar charges accruing with respect to such Extra
          Taxes and Extra Tax Costs from the Potential Adverse Determination
          Date until the earlier of thirty (30) days following a

                                      -9-
<PAGE>

          "final determination" within the meaning of Section 1313 of the Code
          that the Shareholder is required to pay Extra Taxes and/or Extra Tax
          Costs or ten (10) days following written notice from RSI to such
          Shareholder Indemnitee to pay all such Extra Taxes and Extra Tax Costs
          as to which a Potential Adverse Determination Date has occurred (in
          either case, the "Delayed Payment Date"), and (b) all legal and
          accounting costs and expenses incurred in connection with any
          challenge or assertion by the Internal Revenue Service (it being
          understood that the Shareholder Indemnitee shall not in any event have
          any duty to contest any such challenge except, and only to the extent
          that, RSI bears any and all costs associated therewith), in which
          event Extra Taxes and Extra Tax Costs shall be considered payable for
          purposes hereof on the Delayed Payment Date. The obligations of RSI
          pursuant to this Section 3(d) are in addition to, and not in lieu of,
          the obligations of HQ Surviving Corporation and HQGW under Section
          7(j) of the Merger Agreement. The provisions of Section 5(a), 5(b),
          5(c) and 5(d) shall not apply with respect to this Section 3(d)."

          13.  Section 4(a)(X) of the Indemnification Agreement is hereby
amended by deleting clause (i) therein in its entirety.

          14.  Clause 4(b)(Z) of the Indemnification Agreement is hereby amended
by adding the following language at the end of such clause:

          ", or (iii) arising from, relating to, or otherwise in respect of the
          offer or sale of equity securities of HQGW or Holdco to any third
          party in connection with the transactions contemplated by the Merger
          Agreement, the Stock Purchase Agreement or the UK Agreement; provided
          that any recovery under the foregoing shall be reduced by the amount
          of any claim of the RSI Indemnitees under Section 4(a) above."

          15.  The preamble of the form of Registration Rights Agreement
attached to the Merger Agreement as Exhibit G (the "Holdco Registration Rights
                                    ---------
Agreement") is hereby deleted in its entirety and replaced with the following:

          "THIS REGISTRATION RIGHTS AGREEMENT (the "Agreement") is made and
          entered into as of ________, 2000 by and among HQ Global Holdings,
          Inc., a Delaware corporation (the "Company") [the Company will be
          formed as  a wholly owned subsidiary of HQ Global immediately prior to
          the closing under the Merger Agreement and will become the parent
          company of M Sub in connection with the second

                                      -10-
<PAGE>

          step merger], and CarrAmerica Realty Corporation, a Maryland
          corporation ("Carr") and _____________________ (each, a "Seller" and
          collectively, including Carr, the "Sellers")."

          16.  The second paragraph of the Holdco Registration Rights Agreement
is hereby deleted in its entirety and replaced with the following:

          "This Agreement is in connection with (i) the Stockholders Agreement
          of even date herewith (the "Stockholders Agreement") between the
          Company, as issuer of the common stock, par value $[.01] per share
          (the "Securities"), FrontLine Capital Group (formerly known as Reckson
          Services Industries, Inc.) ("RSI"), Carr and certain other
          stockholders of the Company, (ii) the Agreement and Plan of Merger
          among RSI, VANTAS Incorporated, a Nevada corporation ("VANTAS"), Carr
          and HQ Global Workplaces, Inc., a Delaware corporation ("HQ Global"),
          (iii) the Stock Purchase Agreement dated as of January 20, 2000 by and
          between RSI and Carr, and (iv) the Stock Purchase Agreement dated as
          of January 20, 2000 by and among RSI, VANTAS, Carr, OmniOffices (UK)
          Limited and OmniOffices (Lux) 1929 Holding Company S.A..  In order to
          induce the Sellers to consummate the transactions contemplated by the
          foregoing agreements, the Company has agreed to provide to the Sellers
          the registration rights set forth in this Agreement."

          17.  The first recital of the form of Registration Rights Agreement
attached to the Merger Agreement as Exhibit H is hereby deleted in its entirety
                                    ---------
and replaced with the following:

          "This Agreement is in connection with (i) the Stockholders Agreement
          of even date herewith (the "Stockholders Agreement") between FrontLine
          Capital Group (formerly known as Reckson Services Industries, Inc.)
          (the "Company"), as issuer of the common stock, par value $[.01] per
          share (the "Securities") pursuant to the put rights set forth in
          Section 7.1, 7.2 and 7.3 of the Stockholders Agreement among HQ Global
          Holdings, Inc. ("HQ"), Carr and certain other stockholders of HQ, (ii)
          the Agreement and Plan of Merger among the Company, VANTAS
          Incorporated, a Nevada corporation ("VANTAS"), Carr and HQ Global,
          (iii) the Stock Purchase Agreement dated as of January 20, 2000 by and
          between the Company and Carr, and (iv) the Stock Purchase Agreement
          dated as of January 20, 2000 by and among VANTAS, the Company, Carr,
          OmniOffices (UK) Limited and OmniOffices (Lux) 1929 Holding Company
          S.A..  In order to induce the Sellers to consummation the transactions
          contemplated by the

                                      -11-
<PAGE>

          foregoing agreements, the Company has agreed to provide to the Sellers
          the registration rights set forth in this Agreement."

          18.  The Merger Agreement is hereby amended by adding Exhibits K-1, K-
                                                                ---------------
2, K-3 and K-4 to the Merger Agreement in the forms attached to this Amendment.
- --------------

          19.  Schedule 1(e) to the Merger Agreement is hereby amended by
deleting such Schedule in its entirety and replacing it with Schedule 1(e)
attached to this Amendment.

          20.  Schedule 4(c) to the Merger Agreement is hereby amended by
deleting such Schedule in its entirety and replacing it with Schedule 4(c)
attached to this Amendment.

          21.  Schedule 4(a) to the Merger Agreement is hereby amended by
deleing such Schedule in its entirety and replacing it with Schedule 4(a)
attached to this Amendment.

          22.  Schedule 4(o) to the Merger Agreement is hereby amended by
deleting such Schedule in its entirety and replacing it with Schedule 4(o)
attached to this Amendment.

          23.  Schedule 4(p) to the Merger Agreement is hereby amended by
deleting such Schedule in its entirety and replacing it with Schedule 4(p)
attached to this Amendment.

C.        OTHER AGREEMENTS

          The Merger Agreement is hereby amended to add the following
provisions:

          1.   Simultaneously with the execution of this Amendment, VANTAS shall
deliver to the Company immediately available funds in the aggregate amount of
$12,500,000 as an additional initial deposit under the Merger Agreement. VANTAS
shall have the right to deliver to the Company a replacement letter of credit in
the face amount of $47,500,000 (the "Replacement LOC"). The Replacement LOC
shall replace the additional $12,500,000 initial deposit hereunder and the
existing letter of credit previously delivered to the Company by VANTAS, which
additional initial deposit and existing letter of credit shall be returned to
VANTAS upon the Company's receipt of the Replacement LOC. Any references to
"Letter of Credit" in the Merger Agreement shall be deemed to refer to the
Replacement LOC, and any reference to "Initial Deposit" shall be deemed to refer
to

                                      -12-
<PAGE>

$47,500,000 and to include the additional initial deposit hereunder from and
after the date hereof.

          2.   Simultaneously with the execution of this Amendment, RSI shall
contribute an aggregate of $250,000 to VANTAS, and VANTAS shall pay the Company
$125,000 and CarrAmerica $125,000 (the "Legal Fees Allowance") as an allowance
for certain additional legal costs and expenses incurred by such parties as a
result of the extension of the outside Closing Date from April 30, 2000 to May
31, 2000. The Legal Fees Allowance is nonrefundable and will not be used to
adjust the consideration otherwise payable in connection with the Merger
Transactions.

          3.   At Closing, the Second Step Surviving Corporation shall pay to
CarrAmerica, as agent for all of the stockholders of the Company immediately
prior to the effective time of the HQ Merger, an amount in cash equal to the
amount of all tenant improvement costs ("TI Costs") paid by the Company on or
prior to April 30, 2000 that are reimbursable by the landlords but which have
not been reimbursed prior to Closing and are not the subject of dispute with the
relevant landlord (the "TI Reimbursement"), which TI Reimbursement shall be
distributed to such stockholders based on each such stockholder's proportionate
interest in the Company immediately prior to the effective time of the HQ
Merger.  Any such TI Costs paid to the Second Step Surviving Corporation
following the resolution of any dispute with a landlord shall be paid by the
Second Step Surviving Corporation to CarrAmerica, as agent for all of the
stockholders of the Company immediately prior to the effective time of the HQ
Merger, within five business days after receipt of such amounts by the Second
Step Surviving Corporation.  The Company will provide the Second Step Surviving
Corporation with a schedule of the TI Costs (including the identification of any
TI Cost that is the subject of dispute with the relevant landlord) prior to the
Closing.  With respect to projects of the Company for which TI Costs are paid by
the Company both on or before April 30, 2000 and after April 30, 2000 (the
"Straddle Projects"), the amount of the TI Reimbursement with respect to such
Straddle Projects shall be calculated as the total reimbursable amount
multiplied by a fraction, the numerator of which is the TI Costs paid by the
Company on or before April 30, 2000, and the denominator of which is the total
TI Costs.

          4.   At Closing, the Second Step Surviving Corporation shall pay to
CarrAmerica, as agent for all of the stockholders of the Company immediately
prior to the effective time of the HQ Merger, an amount in cash equal to the
amount of all capital expenditures and development costs (including TI Costs,
whether or not reimbursable by landlords) paid by the Company after April 30,
2000 and prior to Closing (net of any amounts the Company actually receives from
landlords prior to Closing as reimbursements of such TI Costs); provided that
the Second Step

                                      -13-
<PAGE>

Surviving Corporation is provided with a schedule of such amounts at or prior to
the Closing.

          5.   RSI and VANTAS hereby represent, warrant, acknowledge and agree
that (a) neither RSI nor VANTAS is aware of any failure on the part of the
Company, CarrAmerica, Omni UK or LuxCo to perform any of their respective
obligations under the Merger Agreement, the Stock Purchase Agreement or the UK
Agreement, (ii) RSI and VANTAS hereby waive any and all rights and claims, fixed
or contingent, with respect to circumstances existing on the date of this
Amendment, relating to any failure by the Company, CarrAmerica, Omni UK or LuxCo
to perform any obligations under the Merger Agreement, the Stock Purchase
Agreement or the UK Agreement, and (iii) neither RSI or VANTAS is aware of any
current right of RSI or VANTAS to terminate (or give notice of its intent to
terminate) the Merger Agreement, the Stock Purchase Agreement or the UK
Agreement.  Notwithstanding anything to the contrary contained in this paragraph
5, nothing in this paragraph 5 shall modify, supplement or amend the
Indemnification Agreement or otherwise affect any of the parties' rights
thereunder from and after the Closing.

          6.   RSI and VANTAS jointly and severally shall indemnify and defend
the Company, CarrAmerica, Omni UK, LuxCo and the respective stockholders,
officers and directors of such entities against all losses, liabilities, claims,
damages and expenses that arise from any claims made by any stockholders,
employees, officers or directors of RSI or VANTAS to the extent relating to (i)
any failure of the parties to consummate any of the Merger Transactions for any
reason other than as a result of a breach by the Company, CarrAmerica, Omni UK
or LuxCo of the Merger Agreement, the Stock Purchase Agreement or the UK
Agreement after the date of this Amendment, and (ii) the integration of
operations of the Company, Omni UK, LuxCo and VANTAS, including wrongful
discharge claims by any current or former employees of VANTAS.  The provisions
of this paragraph 6 shall terminate on the Closing Date; provided that the
indemnification obligations with respect to any claim covered by this paragraph
6 that is asserted by any of the foregoing indemnified parties after the date
hereof (whether or not the underlying action giving rise to the claim occurred
before or after the date hereof) and on or prior to the Closing Date shall
survive until such claim is finally resolved.

          7.   RSI and VANTAS represent and warrant that attached hereto as
Exhibits L and M are correct and complete copies of all term sheets and
- ----------------
commitment letters setting forth all material terms of all debt and equity
arrangements (including all joint venture and other ancillary arrangements)
proposed to be implemented by VANTAS to finance (or in connection with the

                                      -14-
<PAGE>

financing of) the Merger Transactions (the "Financing Exhibits"). RSI and VANTAS
shall cause the terms and conditions of any issuances of debt or equity
(including the execution of any joint venture agreement, operating agreement or
other ancillary arrangement) prior to or in connection with the Merger
Transactions to be the same in all material respects as the terms and conditions
set forth in such Financing Exhibits and shall not make or permit any material
additional term not included in the Financing Exhibits without the prior written
consent of the Company and CarrAmerica. Prior to the Closing, RSI and VANTAS
shall, and shall cause their respective Subsidiaries to, use commercially
reasonable efforts to give the Company and CarrAmerica and their respective
officers, employees, representatives, counsel and accountants and their
respective counsel, auditors and authorized representatives full access, during
normal business hours and upon reasonable notice, to the proposed financing
sources of RSI and VANTAS. RSI and VANTAS shall use commercially reasonable
efforts to ensure that their proposed financing sources are available to and
cooperate with the Company and CarrAmerica. Prior to the Closing, RSI and VANTAS
shall provide weekly reports on the first business day of each week regarding
the status of the financing arrangements. RSI and VANTAS hereby (i) authorize
the Company and CarrAmerica to discuss the terms of the proposed financing
arrangements with the proposed financing sources of RSI and VANTAS, and (ii)
agree that any such discussions by the Company, CarrAmerica and any proposed
financing sources of RSI and VANTAS shall not be deemed to constitute
interference by the Company or CarrAmerica with the proposed financing
arrangements of RSI or VANTAS.

          8.   Attached as Exhibit N is a summary term sheet containing possible
                           ---------
joint venture terms involving one of the proposed equity financing sources for
VANTAS.  Prior to the Closing and thereafter for as long as the stockholders of
the Company immediately prior to the Closing who retain an interest in Holdco
immediately following the Closing (the "Continuing Stockholders") collectively
retain a direct or indirect 10% interest in Holdco, neither RSI nor VANTAS, as
applicable, directly or indirectly shall make or permit any term or condition to
deviate in any material respect from any of the terms or conditions set forth in
the JV Term Sheet or make or permit any additional term not included in the JV
Term Sheet without the prior written consent of the Company and CarrAmerica (if
at or prior to the Closing) or Continuing Stockholders owning a majority of the
aggregate number of shares of Holdco owned by the Continuing Stockholders at the
time such approval is required (if after the Closing), which consent will not be
unreasonably withheld.

          9.   The Company and CarrAmerica represent and warrant, each as to
itself only, that each of the Company and CarrAmerica has the requisite capacity
and authority, and has taken all action necessary in order, to execute, deliver
and

                                      -15-
<PAGE>

perform its respective obligations under this Amendment. This Amendment is a
legal, valid and binding obligation of each of CarrAmerica and the Company,
enforceable in accordance with its terms, except insofar as enforcement thereof
may be limited by bankruptcy, insolvency or other laws relating to or affecting
enforcement of creditors' rights generally including such general equitable
principles as may apply in the enforcement of creditors' rights.

          10.  RSI and VANTAS represent and warrant, each as to itself only,
that each of RSI and VANTAS has the requisite capacity and authority, and has
taken all action necessary in order, to execute, deliver, and perform its
respective obligations under this Amendment.  This Amendment is a legal, valid
and binding obligation of each of RSI and VANTAS, enforceable in accordance with
its terms, except insofar as enforcement thereof may be limited by bankruptcy,
insolvency or other laws relating to or affecting enforcement of creditors'
rights generally including such general equitable principals as may apply in the
enforcement of creditors' rights.

          11.  This Amendment and the other agreements referred to herein
represent the entire understanding of the parties with respect to the subject
matter contained herein.  This Amendment may not be amended, modified or waived
except in a writing signed by the party against whom enforcement of such
amendment, modification or waiter is sought.  This Amendment shall be construed
and interpreted in accordance with the internal laws of the State of Delaware,
without reference to the conflict of laws principles contained therein.  This
Amendment may be executed in one or more counterparts, each of which shall be
deemed an original, but all of which, when taken together, shall constitute one
and the same instrument.

                                      -16-
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed as of the date first written above.


                              HQ GLOBAL WORKPLACES, INC.

                              By:   /s/ Jill B. Louis
                                 --------------------
                              Name: Jill B. Louis
                              Title: Vice President and General Counsel


                              VANTAS INCORPORATED

                              By:   /s/ Steven M. Rathkopf
                                 -------------------------
                              Name: Steven M. Rathkopf
                              Title: Secretary


                              CARRAMERICA REALTY CORPORATION

                              By:   /s/ Karen B. Dorigan
                                 -----------------------
                              Name: Karen B. Dorigan
                              Title: Managing Director


                              FRONTLINE CAPITAL GROUP

                              By:   /s/ Jason Barnett
                                 --------------------
                              Name: Jason Barnett
                              Title: Executive Vice President

                                      -17-

<PAGE>

                                                                    Exhibit 10.7

                  FIRST AMENDMENT TO STOCK PURCHASE AGREEMENT

          THIS FIRST AMENDMENT TO STOCK PURCHASE AGREEMENT (this "Amendment") is
entered into by and between CarrAmerica Realty Corporation ("Seller") and
FrontLine Capital Group (formerly known as Reckson Services Industries, Inc.)
("Buyer") as of April 29, 2000.

                                   RECITALS:

          WHEREAS, Seller and Buyer entered into a Stock Purchase Agreement
dated as of January 20, 2000 (such agreement as heretofore, hereby and
hereinafter amended, the "Stock Purchase Agreement") pursuant to which Seller
agreed to sell shares of common stock of HQ Global Workplaces, Inc. (the
"Company") owned by it to Buyer on the terms set forth therein;

          WHEREAS, the parties hereto wish to make certain amendments to the
Stock Purchase Agreement; and

          WHEREAS, capitalized terms not otherwise defined herein shall have the
meanings set forth in the Stock Purchase Agreement.

          NOW, THEREFORE, in consideration of the foregoing and the respective
covenants and agreements set forth herein, the parties, intending to be legally
bound, agree as follows:

          1.   The second sentence of Section 4(c)(ii) of the Stock Purchase
Agreement is hereby deleted in its entirety and replaced by the following:

          "Other than (i) this Agreement, (ii) the Amended and Restated
          Stockholders Agreement dated as of September 29, 1998 by and among the
          Company, Seller and certain other stockholders of the Company (the
          "Existing Stockholders Agreement"), and (iii) any stockholders
          agreement to be executed in connection with the Closing hereunder,
          none of the Shares are subject to any agreement, contract, commitment,
          understanding or arrangement, including any such agreement, contract,
          commitment, understanding or arrangement restricting or otherwise
          relating to the voting, dividend rights or disposition of the Shares."

          2.   The last sentence of Section 5(c) of the Stock Purchase Agreement
is hereby deleted in its entirety and replaced with the following:
<PAGE>

          "No consent, approval, license, permit, order or authorization of, or
          registration, declaration or filing with, any Governmental Entity is
          required to be obtained or made by or with respect to the Buyer in
          connection with the execution, delivery, performance of this Agreement
          by the Buyer or the consummation of the transactions contemplated
          hereby."

          3.   Section 5 of the Stock Purchase Agreement is hereby amended by
adding the following section:

          "(d) Investment Representation.  Each party acquiring Shares
               -------------------------
          hereunder will be receiving the Shares for his or its own account for
          investment only and not with a view towards distribution or resale.
          Each party acquiring Shares hereunder will either be an "accredited"
          investor within the meaning of Rule 501 promulgated under the
          Securities Act of 1933, as amended (the "Securities Act"), or will
          have such knowledge and experience in financial and business matters
          that such party is capable of evaluating the merits and risks of
          investment in the Shares and will be able to bear the economic risk of
          its investment in the Shares.  Each party acquiring Shares hereunder
          acknowledges that any routine sale of such Shares made in reliance
          upon Rule 144 promulgated under the Securities Act can be made only in
          accordance with the terms and conditions of such Rule and further,
          that in case such Rule is not applicable to any sale of the Shares,
          resale thereof may require compliance with some other exemption under
          the Securities Act prior to resale.  Each party acquiring Shares
          hereunder acknowledges that the certificates representing the Shares
          issued pursuant to this Agreement shall bear the following legend:

          "THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF
          1933. SUCH SECURITIES MAY NOT BE SOLD OR OFFERED FOR SALE,
          TRANSFERRED, HYPOTHECATED OR OTHERWISE ASSIGNED IN THE ABSENCE OF AN
          EFFECTIVE REGISTRATION STATEMENT WITH RESPECT THERETO UNDER SUCH ACT
          OR AN OPINION OF COUNSEL THAT AN EXEMPTION FROM REGISTRATION FOR SUCH
          SALE, OFFER, TRANSFER, HYPOTHECATION OR OTHER ASSIGNMENT IS AVAILABLE
          UNDER SUCH ACT.""

          4.   Section 12(a)(iv) is hereby deleted in its entirety and replaced
with the following:

                                       2
<PAGE>

          "by the Seller or Buyer (provided, however, in the case of Buyer, only
          if Buyer has given the Seller at least five business days' prior
          written notice of its intention to terminate pursuant to this Section
          12(a)(iv), which notice may not be given prior to June 1, 2000), if
          the Closing does not occur on or prior to May 31, 2000;"

          5.   Section 24 is hereby deleted in its entirety and replaced with
the following:

          "24. Additional Signature Parties.  At any time after the date
               ----------------------------
          hereof and at or prior to five (5) business days prior to the Closing,
          any other holder of Non-Voting Common Stock, any holder of voting
          common stock, par value $.01 per share of the Company (the "Voting
          Common Stock") and any holder of warrants to acquire shares of Non-
          Voting Common Stock (the "Warrants") as of the date hereof shall be
          permitted to execute and deliver to the Buyer an Additional Party
          Signature Page substantially in the form of Annex B hereto (each such
          party who executes and delivers to the Buyer such document, an
          "Additional Stockholder Party"), pursuant to which such Additional
          Stockholder Party shall be entitled, subject to the terms and
          conditions herein, to become a "Seller" for all purposes of this
          Agreement, and shall be entitled to sell to Buyer the number of shares
          of Non-Voting Common Stock or Voting Common Stock or the number of
          Warrants, held by such Additional Stockholder Party and set forth on
          such Additional Party Signature Page on the same terms set forth in
          this Agreement; provided that each holder of Warrants that elects to
          sell Warrants hereunder shall be entitled to receive a price per
          Warrant, equal to the Per Share Purchase Price, as adjusted hereunder,
          minus the exercise price of such Warrant.  Each Additional Stockholder
          Party shall be deemed to have made the representations and warranties
          of Seller herein and be bound by the other agreements of Seller
          herein, and the shares of Non-Voting Common Stock and Voting Common
          Stock and the Warrants sold by each such party shall be deemed
          "Shares" for all purposes hereunder.  To the extent that any
          Additional Stockholder Party elects to sell shares of Non-Voting
          Common Stock, shares of Voting Common Stock or Warrants, the number of
          shares of Non-Voting Common Stock to be sold by CarrAmerica pursuant
          to this Agreement shall be decreased by the number of shares of Non-
          Voting Common Stock, shares of Voting Common Stock or Warrants, as
          applicable, to be sold by such Additional Stockholder Party, it being
          intended that the Buyer shall be entitled to and required to purchase
          only the number of shares of Non-Voting Common Stock, shares of Voting
          Common Stock and Warrants, in the aggregate from

                                       3
<PAGE>

          CarrAmerica and all Additional Stockholder Parties, shown as being
          proposed to be sold by CarrAmerica on Exhibit A as delivered on
          January 20, 2000; provided that, notwithstanding anything to the
          contrary contained herein, in the event any Additional Stockholder
          Party shall breach any representation or warranty or otherwise fail to
          perform any of its obligations under this Agreement, CarrAmerica shall
          have the right to make such representation or warranty and otherwise
          perform such obligations on behalf of such Additional Stockholder
          Party. If Warrants are sold to Buyer pursuant to this Section 24,
          Buyer will immediately exercise such Warrants and pay the exercise
          price therefor to the Company (or its successors)."

          6.   Simultaneously with the execution of this Amendment, RSI shall
contribute $1,350,000 to VANTAS and VANTAS shall pay $1,350,000 in cash (the
"Company Stockholder Extension Payment") to the Company, as agent for the
stockholders of the Company who have elected to sell all or a portion of their
shares in the Company, as compensation for the extension of the Closing Date
from April 30, 2000 to May 31, 2000, which funds shall be distributed by the
Company on a pro rata basis to such stockholders based on the percentage of
shares being sold by each such stockholder divided by the total number of shares
being sold. The Company Stockholder Extension Payment is nonrefundable and will
not be used to adjust the consideration otherwise payable in connection with the
consummation of the transactions contemplated by the Stock Purchase Agreement.

          7.   Seller represents and warrants that Seller has the requisite
capacity and authority, and has taken all actions necessary in order, to
execute, deliver and perform its obligations under this Amendment.  This
Amendment is a legal, valid and binding obligation of Seller, enforceable in
accordance with its terms, except insofar as enforcement thereof may be limited
by bankruptcy, insolvency or other laws relating to or affecting enforcement of
creditors' rights generally including such general equitable principles as may
apply in the enforcement of creditors' rights.

          8.   Buyer represents and warrants that Buyer has the requisite
capacity and authority, and has taken all actions necessary in order, to
execute, deliver and perform its obligations under this Amendment.  This
Amendment is a legal, valid and binding obligation of Buyer, enforceable in
accordance with its terms, except insofar as enforcement thereof may be limited
by bankruptcy, insolvency or other laws relating to or affecting enforcement of
creditors' rights generally including such general equitable principles as may
apply in the enforcement of creditors' rights.

                                       4
<PAGE>

          9.   This Amendment and the other agreements referred to herein
represent the entire understanding of the parties with respect to the subject
matter contained herein.  This Amendment may not be amended, modified or waived
except in a writing signed by the party against whom enforcement of such
amendment, modification or waiver is sought.  This Amendment shall be construed
and interpreted in accordance with the laws of the State of Delaware, without
reference to the conflict of laws principles contained therein.  This Amendment
may be executed in one or more counterparts, each of which shall be deemed an
original, but all of which, when taken together, shall constitute one and the
same instrument.

                                       5
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed as of the date first written above.



                            CARRAMERICA REALTY CORPORATION

                            By:   /s/ Karen B. Dorigan
                               -----------------------
                            Name: Karen B. Dorigan
                            Title: Managing Director

                            FRONTLINE CAPITAL GROUP

                            By:  /s/ Jason Barnett
                               -------------------
                            Name: Jason Barnett
                            Title: Executive Vice President

                                       6

<PAGE>

                                                                    Exhibit 10.8

                  FIRST AMENDMENT TO STOCK PURCHASE AGREEMENT


          THIS FIRST AMENDMENT TO STOCK PURCHASE AGREEMENT (this "Amendment") is
entered into by and among CarrAmerica Realty Corporation ("CarrAmerica"),
OmniOffices (UK) Limited ("Omni UK"), OmniOffices (Lux) 1929 Holding Company
S.A. ("LuxCo"), VANTAS Incorporated ("VANTAS")  and FrontLine Capital Group
(formerly known as Reckson Services Industries, Inc.) ("RSI") as of April 29,
2000.

                                   RECITALS:

          WHEREAS, CarrAmerica, Omni UK, LuxCo, VANTAS and RSI entered into a
Stock Purchase Agreement dated as of January 20, 2000 (such agreement, as
heretofore, hereby and hereinafter amended, the "UK Agreement") pursuant to
which CarrAmerica agreed to sell shares of common stock of Omni UK and LuxCo
owned by it together with its interest in certain loans made by it to Omni UK
and LuxCo to VANTAS on the terms set forth therein;

          WHEREAS, VANTAS, RSI, CarrAmerica, Omni UK and LuxCo have executed an
Agreement dated as of March 13, 2000, as amended, pursuant to which such parties
agreed to authorize certain actions governed by the UK Agreement;

          WHEREAS, the parties hereto wish to make certain additional amendments
to the UK Agreement; and

          WHEREAS, capitalized terms not otherwise defined herein shall have the
meanings set forth in the UK Agreement.

          NOW, THEREFORE, in consideration of the foregoing and the respective
covenants and agreements set forth herein, the parties, intending to be legally
bound, agree as follows:

          1.   The second and third recitals of the UK Agreement are hereby
deleted in their entirety and replaced with the following:

          "WHEREAS, CarrAmerica has made certain loans to Omni UK and LuxCo as
          described on Exhibit B attached hereto, and may make additional loans
          to Omni UK and LuxCo as contemplated by Section 4.1(b)(iii) hereof
          (collectively, the "Loans"), which Loans are or will be evidenced by
          promissory notes, the date and denominations of which as of the date
          hereof are set forth on Exhibit B (the "Notes");
<PAGE>

          WHEREAS, CarrAmerica desires to sell and transfer to VANTAS and VANTAS
          desires to purchase from CarrAmerica (i) the Notes in exchange for an
          amount equal to the principal amount of, and any accrued and unpaid
          interest with respect to, the Notes outstanding as of the Closing Date
          in accordance with Section 1.2 (the "Loan Consideration"), and (ii)
          all of the shares of non-voting common stock, par value (Pounds).01
          per share, of Omni UK (which represents approximately 95% of the
          equity interest in Omni UK) (the "UK Non-Voting Common Stock") and all
          of the shares of non-voting common stock, par value $250 per share, of
          LuxCo (which represents approximately 95% of the equity interest in
          LuxCo) (the "Lux Non-Voting Common Stock"; and together with the UK
          Non-Voting Common Stock, collectively, the "Shares") owned of record
          by the Seller for total consideration equal to the "Share
          Consideration" as calculated pursuant to Annex A (the "Share
          Consideration");"

          2.   Section 2.3 of the UK Agreement is hereby amended by inserting
the following at the end of Section 2.3:

          "Notwithstanding anything to the contrary contained herein, the
          parties acknowledge that, in connection with the consummation of the
          transactions contemplated by the Merger Agreement, the consent of the
          general partner of Mercury Executive Offices, L.P. may be required
          under the Limited Partnership Agreement dated November 16, 1998 and
          the management agreements related thereto; it being understood that
          Omni UK, LuxCo, VANTAS and RSI shall use commercially reasonable
          efforts to obtain such consent."

          3.   Section 2.12(a) of the UK Agreement is hereby amended by deleting
the first sentence in its entirety and replacing it with the following:

          "Neither of the Companies nor any of their respective Subsidiaries
          owns any real property or interests in real property, other than
          OmniUK Real Property Leases (as defined below), LuxCo Real Property
          Leases (as defined below), the OmniUK Owned Property (as defined
          below) and certain interests in certain real property assets held
          directly or indirectly through the MAM Investment (as defined below)."

          4.   The provision immediately following Section 2.13(j) on page 12 of
the UK Agreement is hereby deleted in its entirety and replaced with the
following:

                                       2
<PAGE>

          "; provided, however, that notwithstanding anything to the contrary
          contained herein other than any contracts relating to office
          equipment, maintenance or service for any individual business center
          of the Companies or their respective Subsidiaries which does not
          require annual payments in excess of $25,000, the sum of the aggregate
          future liabilities and costs of termination associated with all
          contracts, arrangements, agreements or understandings to which either
          of the Companies or any of their respective Subsidiaries is a party or
          by which they or any of their respective properties or assets which
          are not set forth on Schedule 5.2, 2.13 or 2.16 is bound does not
          exceed $5,000,000."

          5.   Section 2.28 of the UK Agreement is hereby deleted in its
entirety and replaced with the following:

          "Section 2.28 MAM Investment.  OmniUK and certain of its Subsidiaries
                        --------------
          have agreed to invest up to (Pounds)20 million in Mercury Executive
          Offices, L.P. on the terms and conditions set forth in the limited
          partnership agreement, dated November 16, 1998 (the "MAM Investment"),
          of which at least (Pounds)15,594,241 has been funded. Notwithstanding
          anything to the contrary contained herein, the parties acknowledge
          that, in connection with the consummation of the transactions
          contemplated by the Merger Agreement, the consent of the general
          partner of Mercury Executive Offices, L.P. may be required under the
          Limited Partnership Agreement dated November 16, 1998 and the
          management agreements related thereto; it being understood that Omni
          UK, LuxCo, VANTAS and RSI shall use commercially reasonable efforts to
          obtain such consent."

          6.   Section 4.1(b)(iii) of the UK Agreement is hereby deleted in its
entirety and replaced with the following:

          "incur or assume any liabilities or incur any indebtedness for
          borrowed money, assume, guarantee, endorse or otherwise as an
          accommodation become responsible for the obligations of any other
          individual, corporation or entity (other than a wholly owned
          Subsidiary) except pursuant to contracts or agreements listed in
          Schedule 2.13 or except for loans and equity investments (which shall
          be deemed to be included on Exhibit A or Exhibit B, as applicable,
          attached hereto) by CarrAmerica necessary to fund the business of the
          Companies in the ordinary course or to fund committed developments;"

          7.   Section 4.1(b)(v) of the UK Agreement is hereby deleted in its
entirety and replaced with the following:

                                       3
<PAGE>

          "make any material change in any Omni UK Real Property Lease or LuxCo
          Real Property Lease, as applicable, or other contracts or enter into,
          renew, fail to renew, terminate or permit to be terminated any Omni UK
          Real Property Lease or LuxCo Real Property Lease, as applicable, any
          other contract or agreement that calls for aggregate annual payments
          of $25,000 or more and which either (i) is not terminable by either of
          the Companies or their respective Subsidiary, as applicable, at will
          on 60 days or less notice without payment of a penalty or (ii) has a
          term of more than six months, other than the operating leases and
          related letters of comfort executed by Omni UK, LuxCo or any
          Subsidiaries thereof with respect to development and refurbishment
          projects identified in the CapEx Budget, as contemplated by the
          operating budgets for those projects;"

          8.   Section 5.5 of the UK Agreement is hereby amended by inserting
the following sentence at the end of such section:

          "Not later than six months after the Closing, the Second Step
          Surviving Corporation shall reimburse CarrAmerica, as agent for itself
          and the stockholders of HQ Global Workplaces, Inc. ("HQ Global")
          immediately prior to the Closing (based on their proportionate
          indirect beneficial interests in Omni UK and LuxCo), for any
          additional lease deposits of Omni UK and LuxCo that are not identified
          on the disclosure schedules delivered in connection with the execution
          of this Agreement; provided that the Second Step Surviving Corporation
          is provided with a schedule of such additional lease deposits at or
          prior to Closing."

          9.   Article 5 of the UK Agreement is hereby amended by adding the
following sections at the end of such Article 5:

          "Section 5.6  MAM Hammersmith Center.  RSI and VANTAS hereby consent
                        ----------------------
          to the development of the MAM Hammersmith center. Immediately
          subsequent to the Closing, the Second Step Surviving Corporation shall
          reimburse CarrAmerica, as agent for itself and the stockholders of HQ
          Global immediately prior to the Closing (based on their proportionate
          indirect beneficial interests in Omni UK and LuxCo), for any costs
          that have been or will be incurred prior to Closing in connection with
          the development of the MAM Hammersmith center; provided that the
          Second Step Surviving Corporation is provided with a schedule of such
          amounts at or prior to Closing.

                                       4
<PAGE>

          Section 5.7  Prepaid Rent; Tenant Reimbursement. Immediately
                       ----------------------------------
          subsequent to the Closing, the Second Step Surviving Corporation shall
          pay to CarrAmerica, as agent for itself and the stockholders of HQ
          Global immediately prior to the Closing (based on their proportionate
          indirect beneficial interests in Omni UK and LuxCo), $576,000, which
          represents the amount of rent of Omni UK and LuxCo that was prepaid
          for the period after Closing;; provided that the Second Step Surviving
          Corporation is provided with a schedule of such amounts at or prior to
          Closing.

          Section 5.8  Capital Expenditures and Cash Fundings. Immediately
          ---------------------------------------------------
          subsequent to the Closing, the Second Step Surviving Corporation shall
          reimburse CarrAmerica, as agent for itself and the stockholders of HQ
          Global immediately prior to the Closing (based on their proportionate
          indirect beneficial interests in Omni UK and LuxCo), for all capital
          expenditures and development expenses of Omni UK or LuxCo incurred
          after April 30, 2000 and prior to Closing, including amounts funded to
          enable Omni UK to satisfy its capital commitments with respect to the
          MAM Investment; provided that the Second Step Surviving Corporation is
          provided with a schedule of such amounts at or prior to Closing.

          Section 5.9  Side Letter.  At Closing, VANTAS shall assume the
                       -----------
          obligations of CarrAmerica with respect to that certain Side Letter
          dated as of November 16, 1998 by and among HQMerc UK Management
          Limited ("HQ Merc"), P.R.A. Investments Limited ("PRA"), P.K.
          Investments Limited ("PKL"), Peter Allport ("Allport"), Peter Kershaw
          ("Kershaw"), HQ Holdings Limited ("HQ Holdings") and CarrAmerica and
          that certain Side Letter dated as of November 16, 1998 by and among HQ
          Merc UK Partnership Limited, PRA, PKL, Allport, Kershaw, HQ Holdings
          and CarrAmerica."

          10.  Section 6.2(b) of the UK Agreement is hereby deleted in its
entirety and replaced with the following:

          "CarrAmerica shall have received the cash required by Sections 1.2,
          5.3, 5.5, 5.6, 5.7 and 5.8."

          11.  All references to "April 30, 2000" in Article X(a)(iv), Article
X(a)(vi) and Article X(a)(vii) of the UK Agreement are hereby changed to "May
31, 2000."

          12.  All references to "May 1, 2000" in Article X(a)(iv) of the UK
Agreement are hereby changed to "June 1, 2000."

                                       5
<PAGE>

          13.  The amount of the Loan Notes identified in Annex A to the UK
Agreement is hereby deleted and replaced with "21,229,392 (reduced by the amount
of any payments thereto prior to Closing)."

          14.  Simultaneously with the execution of this Amendment, RSI shall
contribute $900,000 to VANTAS and VANTAS shall pay $900,000 in cash (the "UK
Stockholder Extension Payment") to CarrAmerica, as compensation for the
extension of the Closing Date from April 30, 2000 to May 31, 2000. The UK
Stockholder Extension Payment is nonrefundable and will not be used to adjust
the consideration otherwise payable in connection with the consummation of the
transactions contemplated by the UK Agreement.

          15.  CarrAmerica, Omni UK and LuxCo represent and warrant, each as to
itself only, that each of CarrAmerica, Omni, UK and LuxCo has the requisite
capacity and authority, and has taken all actions necessary in order, to
execute, deliver and perform its obligations under this Amendment.  This
Amendment is a legal, valid and binding obligation of each of CarrAmerica, Omni
UK and LuxCo, enforceable in accordance with its terms, except insofar as
enforcement thereof may be limited by bankruptcy, insolvency or other laws
relating to or affecting enforcement of creditors' rights generally including
such general equitable principles as may apply in the enforcement of creditors'
rights.

          16.  VANTAS and RSI represent and warrant that each of VANTAS and RSI
has the requisite capacity and authority, and has taken all actions necessary in
order, to execute, deliver and perform its obligations under this Amendment.
This Amendment is a legal, valid and binding obligation of each of VANTAS and
RSI, enforceable in accordance with its terms, except insofar as enforcement
thereof may be limited by bankruptcy, insolvency or other laws relating to or
affecting enforcement of creditors' rights generally including such general
equitable principles as may apply in the enforcement of creditors' rights.

          17.  This Amendment, the Merger Agreement, as amended, the Stock
Purchase Agreement, as amended, and the other agreements referred to herein and
therein represent the entire understanding of the parties with respect to the
subject matter contained herein.  This Amendment may not be amended, modified or
waived except in a writing signed by the party against whom enforcement of such
amendment, modification or waiver is sought.  This Amendment shall be construed
and interpreted in accordance with the laws of the State of Delaware, without
reference to the conflict of laws principles contained therein.  This Amendment
may be executed in one or more counterparts, each of which shall be deemed an
original, but all of which, when taken together, shall constitute one and the
same instrument.

                                       6
<PAGE>

                           [signature page follows]

                                       7
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed as of the date first written above.



                         CARRAMERICA REALTY CORPORATION

                         By:   /s/ Karen B. Dorigan
                            -----------------------
                         Name: Karen B. Dorigan
                         Title: Managing Director

                         OMNIOFFICES (UK) LIMITED

                         By:   /s/ Thomas A. Carr
                            ---------------------
                         Name: Thomas A. Carr
                         Title: Director

                         OMNIOFFICES (LUX) 1929 HOLDING COMPANY S.A.

                         By:   /s/ Thomas A. Carr
                            ---------------------
                         Name: Thomas A. Carr
                         Title: Director

                         FRONTLINE CAPITAL GROUP

                         By:   /s/ Jason Barnett
                            --------------------
                         Name: Jason Barnett
                         Title: Executive Vice President

                         VANTAS INCORPORATED

                         By:   /s/ Steven M. Rathkopf
                            -------------------------
                         Name: Steven M. Rathkopf
                         Title: Secretary

                                       8

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CARRAMERICA
REALTY CORPORATION AND SUBSIDIARIES CONSOLIDATED BALANCE SHEET AS OF MARCH 31,
2000 AND FROM CARRAMERICA REALTY CORPORATION AND SUBSIDIARIES CONSOLIDATED
STATEMENT OF OPERATIONS FOR THE THREE MONTHS ENDED MARCH 31, 2000.
</LEGEND>
<MULTIPLIER> 1,000

<S>                             <C>
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                              JAN-1-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                          57,398
<SECURITIES>                                         0
<RECEIVABLES>                                   29,113
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                     0
<PP&E>                                       3,133,131
<DEPRECIATION>                                 348,860
<TOTAL-ASSETS>                               3,477,034
<CURRENT-LIABILITIES>                                0
<BONDS>                                      1,609,911
                                0
                                         93
<COMMON>                                           671
<OTHER-SE>                                   1,678,468
<TOTAL-LIABILITY-AND-EQUITY>                 3,477,034
<SALES>                                              0
<TOTAL-REVENUES>                               141,566
<CGS>                                                0
<TOTAL-COSTS>                                  113,039
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                   0
<INCOME-PRETAX>                                 36,207
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                             33,152
<DISCONTINUED>                                 (1,380)
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    31,772
<EPS-BASIC>                                       0.34
<EPS-DILUTED>                                     0.34


</TABLE>


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