DOUBLECLICK INC
10-Q/A, 1999-10-15
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                     U.S. SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                   FORM 10-Q/A

                                 Amendment No. 1

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

                  FOR THE QUARTERLY PERIOD ENDED MARCH 31, 1999
                                       OR

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

         FOR THE TRANSITION PERIOD FROM ______________ TO ______________

                        COMMISSION FILE NUMBER: 000-23709

                                DOUBLECLICK INC.
             (Exact Name of Registrant as Specified in its Charter)

           DELAWARE                                             13-3870996
(State or other jurisdiction of                             (I.R.S. Employer
incorporation or organization)                            Identification Number)

                          41 MADISON AVENUE, 32ND FLOOR
                            NEW YORK, NEW YORK 10010
              (Address of Principal Executive Officer and Zip Code)

                                 (212) 683-0001
              (Registrant's Telephone Number, Including Area Code)

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

      As of April 30, 1999, there were 39,580,068 shares of the registrant's
common stock outstanding.

<PAGE>

                                                                          PAGE
                                                                         NUMBER
                                                                         ------

PART I FINANCIAL INFORMATION

ITEM 2:  Consolidated Financial Information:

         Consolidated Balance Sheet as of March 31, 1999 and
         December 31, 1998 (unaudited with respect to March 31, 1999) .....  3

         Unaudited Consolidated Statement of Operations for the three
         months ended March 31, 1999 and 1998......... ....................  4

         Unaudited Consolidated Statement of Cash Flows for the three
         months ended March 31, 1999 and 1998..............................  5

         Unaudited Consolidated Statement Of Stockholders' Equity for
         the three months ended March 31, 1999 and 1998....................  6

         Notes to Unaudited Consolidated Financial Statements .............  7

ITEM 2:  Management's Discussion and Analysis of Financial Condition
         and Results of Operations......................................... 13

ITEM 3:  Quantitative and Qualitative Disclosures about Market Risk........ 21

PART II  OTHER INFORMATION

ITEM 1:  Legal Proceedings......... ....................................... 32

ITEM 2:  Changes in Securities and Use of Proceeds......................... 32

ITEM 3:  Defaults Upon Senior Securities................................... 32

ITEM 4:  Submission of Matters to a Vote of Security Holders .............. 32

ITEM 5:  Other Information......... ....................................... 32

ITEM 6:  Exhibits and Reports on Form 8-K.................................. 32

ITEM 7:  Signatures ....................................................... 34

<PAGE>

                                DOUBLECLICK INC.

                           CONSOLIDATED BALANCE SHEET
                      (in thousands, except share amounts)

<TABLE>
<CAPTION>
                                                               March 31,      December 31,
                                                                 1999             1998
                                                                 ----             ----
                                                              (unaudited)
                       ASSETS
<S>                                                             <C>             <C>
Current assets:
Cash and cash equivalents ................................      $ 331,851       $ 127,171
Short-term investments ...................................         39,295           9,643
Accounts receivable, less allowances of $4,297 and $3,929.         23,085          31,342
Prepaid expenses and other current assets ................          2,199             869
                                                                ---------       ---------
     Total current assets ................................        396,430         169,025

Property and equipment, net ..............................         14,296          13,741
Investments and other assets .............................          5,925             855
                                                                ---------       ---------
     Total assets ........................................      $ 416,651       $ 183,621
                                                                =========       =========

          LIABILITIES AND STOCKHOLDERS' EQUITY

Current liabilities:
Accounts payable .........................................      $   9,059       $  20,583
Accrued expenses .........................................         11,130          12,220
Deferred revenues ........................................          3,729           1,683
Deferred license and service fees ........................            421             421
                                                                ---------       ---------
     Total current liabilities ...........................         24,339          34,907

Convertible subordinated notes ...........................        250,000              --
Other liabilities ........................................            321             375

Stockholders' equity:
Common stock, par value $0 001;
  39,465,228 and 39,135,774 shares  outstanding ..........             39              39
Additional paid-in capital ...............................        204,205         203,417
Accumulated deficit ......................................        (61,642)        (54,717)
Deferred compensation ....................................           (345)           (441)
Other accumulated comprehensive income (loss) ............           (266)             41
                                                                ---------       ---------
     Total stockholders' equity ..........................        141,991         148,339
                                                                ---------       ---------
     Total liabilities and stockholders' equity ..........      $ 416,651       $ 183,621
                                                                =========       =========
</TABLE>

              The accompanying notes are an integral part of these
                       consolidated financial statements


                                       3
<PAGE>

                                DOUBLECLICK INC.

                 UNAUDITED CONSOLIDATED STATEMENT OF OPERATIONS
                                 (in thousands)

<TABLE>
<CAPTION>
                                                            Three Months Ended March 31,
                                                            ----------------------------
                                                               1999             1998
                                                             --------         --------
<S>                                                          <C>              <C>
Revenues ............................................        $ 22,087         $ 13,004
Cost of revenues ....................................          10,098            8,845
                                                             --------         --------
   Gross profit .....................................          11,989            4,159
                                                             --------         --------
Operating expenses
   Sales and marketing ..............................          11,057            5,624
   General and administrative .......................           4,265            2,349
   Product development ..............................           3,611            1,025
   Facility relocation & other ......................           1,644               --
                                                             --------         --------
     Total operating expenses .......................          20,577            8,998
                                                             --------         --------
Loss from operations ................................          (8,588)          (4,839)

Interest income .....................................          (2,005)            (428)
Interest expense ....................................             342               16
                                                             --------         --------
Net loss ............................................        $ (6,925)        $ (4,427)
                                                             ========         ========

Basic and diluted net loss per share ................        $  (0.18)        $  (0.21)

Weighted average shares used in basic and diluted net
loss per share calculation ..........................          39,301           21,166
                                                             ========         ========
</TABLE>

              The accompanying notes are an integral part of these
                       consolidated financial statements


                                       4
<PAGE>

                                DOUBLECLICK INC.

                 UNAUDITED CONSOLIDATED STATEMENT OF CASH FLOWS
                                 (in thousands)

<TABLE>
<CAPTION>
                                                                     Three Months Ended March 31,
                                                                     ----------------------------
                                                                        1999            1998
                                                                     ---------       ---------
<S>                                                                  <C>             <C>
CASH FLOWS FROM OPERATING ACTIVITIES
   Net loss ...................................................      $  (6,925)      $  (4,427)
   Adjustments to reconcile net loss to cash used
     in operating activities:
     Depreciation and amortization ............................          1,015             205
      Facility relocation and other ...........................          1,363
     Amortization of deferred compensation ....................             96             204
     Provision for bad debt and advertisers discounts .........            368              86
     Changes in operating assets and liabilities:
       Accounts receivable ....................................          7,889          (5,133)
       Prepaid expenses and other current assets ..............         (1,168)           (125)
       Accounts payable .......................................        (11,524)          1,667
       Accrued expenses .......................................         (1,078)          2,215
       Deferred revenues ......................................          1,941           1,156
                                                                     ---------       ---------
          Net cash used in operating activities ...............         (8,023)         (4,152)
                                                                     ---------       ---------

CASH FLOWS FROM INVESTING ACTIVITIES

   Purchases of short-term investments ........................        (29,963)             --
   Proceeds from maturities of short-term investments .........            311           3,536
   Purchases of property and equipment ........................         (2,862)         (2,731)

                                                                     ---------       ---------
          Net cash (used in) provided by investing activities .        (32,514)            805
                                                                     ---------       ---------

CASH FLOWS FROM FINANCING ACTIVITIES
   Proceeds from issuance of Convertible Subordinated Notes,
       net of deferred offering costs of $5,253 ...............        244,747              --
   Proceeds from issuance of common stock .....................             --          62,506
   Proceeds from exercise of stock options ....................            936              11
   Other ......................................................           (159)            228
                                                                     ---------       ---------
          Net cash provided by financing activities ...........        245,524          62,745

Effect of cumulative translation adjustment ...................           (307)            (22)

Net increase in cash and cash equivalents .....................        204,680          59,376
Cash and cash equivalents at beginning of period ..............        127,171           2,672
                                                                     ---------       ---------
Cash and cash equivalents at end of period ....................      $ 331,851       $  62,048
                                                                     =========       =========
</TABLE>

              The accompanying notes are an integral part of these
                       consolidated financial statements


                                       5
<PAGE>

                                DOUBLECLICK INC.

            UNAUDITED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
                                 (in thousands)

                                                    Three Months Ended March 31,
                                                    ----------------------------
                                                      1999               1998

BALANCE AT BEGINNING OF PERIOD .............        $ 148,339         $   9,400

Net loss ...................................           (6,925)           (4,427)
Other comprehensive income (loss) ..........             (307)              (22)
                                                    ---------         ---------
Comprehensive income (loss) ................           (7,232)           (4,449)

Amortization of deferred compensation ......               96               204
Proceeds from exercise of stock options ....              936                11
Proceeds from issuance of common stock .....               --            62,506
Other ......................................             (148)               (5)
                                                    ---------         ---------
BALANCE AT END OF PERIOD ...................        $ 141,991         $  67,667
                                                    =========         =========

              The accompanying notes are an integral part of these
                       consolidated financial statements


                                       6
<PAGE>

                                DOUBLECLICK INC.

             NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

NOTE 1--ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

DESCRIPTION OF BUSINESS

      DoubleClick Inc., together with its subsidiaries, ("DoubleClick") is a
leading provider of comprehensive Internet advertising solutions for advertisers
and Web publishers. DoubleClick's DART technology and media expertise enable it
to dynamically deliver highly targeted, measurable and cost-effective Internet
advertising for advertisers, increase ad sales and improve ad space inventory
management for Web publishers. DoubleClick was organized as a Delaware
corporation on January 23, 1996 and commenced operations on that date.

      Inherent in DoubleClick's business are various risks and uncertainties,
including its limited operating history, recent development of the Internet
advertising market and unproven acceptance and effectiveness of Web advertising,
unproven business model, risks associated with technological change, and the
limited history of commerce on the Internet. DoubleClick's success may depend in
part upon the emergence of the Internet as a communications medium, prospective
product development efforts, and the acceptance of DoubleClick's solutions by
the marketplace.

BASIS OF PRESENTATION

      The consolidated financial statements included herein include the accounts
of DoubleClick Inc., and its wholly owned subsidiaries. All significant
intercompany transactions and balances have been eliminated. Investments in less
than 20% owned business partners, for which DoubleClick does not have the
ability to exercise significant influence and there is not a readily
determinable market value, are accounted for using the cost method of
accounting. Dividends and other distributions of earnings from investees, if
any, are included in income when declared.

      The consolidated balance sheet as of March 31, 1999, the consolidated
statement of operations for the three months ended March 31, 1999 and 1998, and
the consolidated statement of cash flows for the three months ended March 31,
1999 and 1998 have been prepared by DoubleClick and are not audited. In the
opinion of management, all adjustments (which include only normal recurring
adjustments) necessary to present fairly the financial position, results of
operations and cash flows at March 31, 1999 and for all periods presented have
been made. The consolidated balance sheet at December 31, 1998 has been derived
from the audited financial statements at that date.

      Certain reclassifications have been made to prior period financial
statements to conform to the current period presentation.

      Certain information and footnote disclosures normally included in
financial statements prepared in accordance with generally accepted accounting
principles have been condensed or omitted pursuant to the Securities and
Exchange Commission's rules and regulations.


                                       7
<PAGE>

                                DOUBLECLICK INC.

       NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

NOTE 1--ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

      The unaudited consolidated financial statements should be read in
conjunction with the audited consolidated financial statements of DoubleClick
and the notes thereto included in DoubleClick's Annual Report on Form 10-K for
the year ended December 31, 1998, filed with the Securities and Exchange
Commission on March 4, 1999, as amended on April 27, 1999. The results of
operations for the three months ended March 31, 1999 are not necessarily
indicative of the results to be expected for any subsequent quarter or the
entire year ending December 31, 1999.

      In December 1996, DoubleClick entered into a Procurement and Trafficking
Agreement with Digital Equipment Corp. (subsequently acquired by Compaq Computer
Corp. ("Compaq")) to be the exclusive third-party provider of advertising
services on specified pages within the AltaVista Web site. Effective January 1,
1999, DoubleClick changed its relationship with Compaq by entering into an
Advertising Services Agreement (the "AltaVista Advertising Services Agreement")
that superceded the Procurement and Trafficking Agreement. Under the AltaVista
Advertising Services Agreement, the manner in which DoubleClick reports its
financial results related to the services it provides to the AltaVista Web site
has changed. Through December 31, 1998, DoubleClick recognized as revenues the
gross revenues related to ads delivered by DoubleClick to the AltaVista Web
site. Beginning January 1, 1999, pursuant to the AltaVista Advertising Services
Agreement, DoubleClick recognizes DART service fees, sales commissions and
billing and collection fees as revenues derived from the sale and delivery of
ads on the AltaVista Website and associated services.

MANAGEMENT'S USE OF ESTIMATES

      The preparation of financial statements in conformity with generally
accepted accounting principles requires management to make estimates and
assumptions that affect the reported amounts of assets and liabilities,
disclosure of contingent assets and liabilities at the date of the financial
statements and the reported amounts of revenues and expenses during the
reporting period. Actual results may differ from those estimates.


CASH, CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS


      DoubleClick considers all short-term investments with a remaining
contractual maturity at date of purchase of three months or less to be cash
equivalents.




      DoubleClick classifies its short-term investments as available-for-sale.
Accordingly, these investments are carried at fair value. At March 31, 1999 and
December 31, 1998, the fair value of such securities approximated cost and the
unrealized holding gains or losses were not material. DoubleClick recognizes
gains and losses on specific identification of the securities which comprise the
short-term investment balance. For the three months ended March 31, 1999 and
1998, the Company did not realize any gains or losses as no investments
were sold prior to maturity.



                                       8
<PAGE>

                                DOUBLECLICK INC.

       NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

NOTE 1--ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

REVENUE RECOGNITION

      Revenues are derived primarily from the sale and delivery of advertising
impressions through third-party Web sites comprising DoubleClick Network (the
"Network") and fees earned from independent publishers and advertisers who use
the DART technology to deliver ad impressions. Revenues are recognized in the
period the advertising impressions are delivered provided collection of the
resulting receivable is probable.

      DoubleClick becomes obligated to make payments to third-party Web sites,
which have contracted with DoubleClick to be part of the Network, in the period
the advertising impressions are delivered. Such expenses are classified as cost
of revenues in the consolidated statement of operations.


      Revenues earned by the Company derived from sales commissions and
administrative services are recognized in the period in which the services are
provided.

      Revenues are presented net of a provision for advertiser discounts which
is estimated and established in the period in which the services are provided.


      Deferred license and service fees represent payments received in advance
from third parties or affiliated companies for use of DoubleClick's trademarks,
access to DoubleClick's proprietary technology, and certain personnel during
fixed periods of time which range from two to four years. Such fees will be
recognized as revenues ratably over the terms of the applicable agreements.
DoubleClick is obligated to provide any enhancements or upgrades it develops and
other support over the term of the applicable agreements.

PRODUCT DEVELOPMENT COSTS

      Product development costs and enhancements to existing products are
charged to operations as incurred. Software development costs are required to be
capitalized when a product's technological feasibility has been established by
completion of a working model of the product and ending when a product is
available for general release to customers. To date, completion of a working
model of DoubleClick's products and general release have substantially
coincided. As a result, DoubleClick has not capitalized any software development
costs since such costs have not been significant.


INTERNAL-USE SOFTWARE

      On January 1, 1999 the Company adopted Statement of Position (SOP) 98-1,
"Accounting for the Costs of Computer Software Developed or Obtained for
Internal Use." This standard requires certain direct development costs
associated with internal-use software to be capitalized including external
direct costs of material and services and payroll costs for employees devoting
time to the software projects. These costs are included in property and
equipment and are amortized over the useful life of the software beginning when
the asset is substantially ready for use. Costs incurred during the preliminary
project stage, as well as for maintenance and training are expensed as incurred.
Adoption of this statement did not have a material impact on the Company's
financial statements.


FINANCIAL INSTRUMENTS AND CONCENTRATIONS OF CREDIT RISK

      DoubleClick's financial instruments consist of cash and cash equivalents,
short-term investments, accounts receivable, accounts payable, and accrued
expenses. At March 31, 1999 and December 31, 1998, the fair value of these
instruments approximated their financial statement carrying amount.

      Credit is extended to customers based on an evaluation of their financial
condition, and collateral is not required. DoubleClick performs ongoing credit
evaluations of its customers and maintains an allowance for doubtful accounts.

      DoubleClick is subject to concentrations of credit risk and interest rate
risk related to its short-term investments. DoubleClick's credit risk is managed
by investing in money market funds, short term commercial paper, and A1 rated
corporate bonds with an average days to maturity of 64 days at March 31, 1999.

      Net revenues derived from advertising impressions delivered to users of
the AltaVista Web site represented 21.1% and 50.9% of DoubleClick's total
revenues for the three months ended March 31, 1999 and 1998, respectively. No
other Web site on the Network was responsible for 10% or more of DoubleClick's
total revenues during the periods presented in the consolidated statement of
operations. Likewise, for the year ended December 31, 1998 and for the three
months ended March 31, 1999, no advertising customer was responsible for 10% or
more of DoubleClick's total revenue or total accounts receivable.


                                       9
<PAGE>

                                DOUBLECLICK INC.

       NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

NOTE 1--ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

INCOME TAXES

      DoubleClick uses the asset and liability method of accounting for income
taxes. Under this method, deferred tax assets and liabilities are recognized for
the future tax consequences attributable to differences between the financial
statement carrying amounts of existing assets and liabilities and their
respective tax bases and to operating loss and tax credit carryforwards.
Deferred tax assets and liabilities are measured using enacted tax rates
expected to apply to taxable income in the years in which those temporary
differences are expected to be recovered or settled. The effect on deferred tax
assets and liabilities of a change in tax rates is recognized in results of
operations in the period that includes the enactment date.

BASIC AND DILUTED NET LOSS PER SHARE

      The presentation of basic and diluted net loss per share has been
calculated to give effect to the conversion of the Convertible Preferred Stock
from the date of conversion, which occurred simultaneous with the closing of
DoubleClick's initial public offering on February 25, 1998. Basic net loss per
share is computed by dividing the net loss by the sum of the weighted average
number of shares of common stock outstanding, including the number of common
shares issued upon the conversion of Convertible Preferred Stock, as of the date
of conversion.


      Diluted earnings per share is based on the potential dilution that would
occur on exercise or conversion of securities into common stock. At March 31,
1999 and 1998, outstanding options to purchase shares of common stock of
approximately 7.6 million and 5.8 million, respectively, with weighted average
per share exercise prices of $8.31 and $2.01, respectively, that could
potentially dilute basic earnings per share in the future were not included in
the computation of diluted net loss per share because to do so would have had an
antidilutive effect for the period presented. Similarly, DoubleClick had $250
million of convertible subordinated notes due 2006, convertible into common
stock at $82.50 per share, outstanding at March 31, 1999 that were not included
in the computation of diluted net loss per share because to do so would have had
an antidilutive effect for the period presented. As a result, the basic and
diluted per share amounts are equal for the three months periods ended March 31,
1999 and 1998.


NEW ACCOUNTING PRONOUNCEMENTS

      In June 1998, the FASB issued SFAS No. 133, Accounting for Derivative
Instruments and Hedging Activities. SFAS No. 133 is effective for fiscal years
beginning after June 15, 1999. DoubleClick does not expect that the adoption of
SFAS No. 133 will have a material impact on its consolidated financial
statements because DoubleClick does not currently hold any derivative
instruments.

NOTE 2--PROPERTY AND EQUIPMENT

      Property and equipment are stated at cost. Depreciation is provided using
the straight-line method over the estimated useful life of the assets. Leasehold
improvements are amortized over their estimated useful lives, or the term of the
leases, whichever is shorter.


                                       10
<PAGE>

                                DOUBLECLICK INC.

       NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

<TABLE>
<CAPTION>
                                                      ESTIMATED        MARCH 31,       DECEMBER 31,
(000's)                                              USEFUL LIFE         1999              1998
- -------                                              -----------         ----              ----
<S>                                                   <C>              <C>              <C>
Computer Equipment and Software ..............        1-3 years        $ 14,787         $ 12,453
Furniture and Fixtures .......................          5 years           1,294            1,247
Leasehold Improvements .......................        1-5 years           2,432            2,013
Capital Work-In-Progress                                                    808              696
                                                                       --------         --------

                                                                         19,321           16,409
Less accumulated depreciation and amortization                           (5,025)          (2,668)
                                                                       --------         --------
                                                                       $ 14,296         $ 13,741
                                                                       ========         ========
</TABLE>


      As a result of DoubleClick's planned relocation, expected to be completed
on or about November 30, 1999, DoubleClick incurred a non-recurring charge for
the write-down of fixed assets (primarily leasehold improvements), of
approximately $1.4 million on assets with a carrying value of $2.1 million.
These assets will be abandoned and not relocated to DoubleClick's new
headquarters building (see Note 3). DoubleClick's management made an assessment
of the carrying value of the assets to be disposed of and determined that their
carrying value was in excess of their estimated fair value. The estimated fair
value of the assets was determined based on an estimate of the recoverability of
the assets carrying amount over their remaining useful life to the abandonment
date using their initial cost recovery rate. The other components of the
facility relocation charge include duplicative rental amounts and moving costs
of approximately $270,000 and $11,000, respectively, for the three months ended
March 31, 1999. Duplicative rental and moving costs are expensed in the period
incurred. These charges are included as Facility relocation and other in the
Consolidated Statements Of Operations. Depreciation and amortization of $243
thousand associated with the assets to be disposed of are presented outside of
Facility relocation and other in the Consolidated Statement of Operations.


NOTE 3--LEASE AGREEMENT

      DoubleClick entered into a lease agreement dated January 26, 1999 for over
150,000 square feet of office space located at 450 West 33rd Street, New York,
New York, for a term of eleven years with an option to renew the initial term
for an additional five years. This facility will be used to consolidate
DoubleClick's present executive offices and principal operations located in New
York. In 1999, DoubleClick will make lease payments of approximately $800,000 on
this space. In addition, DoubleClick will pay monthly payments totaling $4.6
million per annum for the period from January 26, 2000 to January 25, 2004
escalating to $4.85 million for the period from January 26, 2004 to January 25,
2005 and $5.0 million per annum for the period from January 26, 2006 to the
expiration date of the initial term on January 25, 2010.

NOTE 4--CONVERTIBLE SUBORDINATED NOTES

      On March 17, 1999, DoubleClick issued 4 3/4% Convertible Subordinated
Notes due 2006 with a principal amount of $250 million (the "Convertible
Notes"). The Convertible Notes are convertible into DoubleClick's common stock
at a conversion price of $82.50 per share, subject to adjustment in certain
events and at the holders' option. Interest on the Convertible Notes is payable
semiannually in arrears on March 15 and September 15 of each year, commencing on
September 15, 1999. The Convertible Notes are unsecured and are subordinated to
all existing and future Senior Indebtedness (as defined in Convertible Notes
indenture) of DoubleClick. If certain events occur (as described in the
Convertible Notes indenture), the Convertible Notes may be redeemed at the
option of DoubleClick, in whole or in part, beginning on March 20, 2001 at the
redemption prices set forth in the Convertible Notes indenture. DoubleClick is
obligated to file by May 21, 1999, a shelf registration statement covering
resales of the Convertible Notes and the common stock issuable upon conversion
of the Convertible Notes.

      Upon occurrence of a Designated Event (as defined in the Convertible Notes
indenture) prior to the maturity of the Convertible Notes, each holder of the
Convertible Notes has the right to require DoubleClick to redeem all or any part
of the holder's Convertible Notes at a price equal to 100% of the principal
amount, plus any accrued interest, of the Convertible Notes being redeemed.


                                       11
<PAGE>

                                DOUBLECLICK INC.

       NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED) (CONTINUED)

      DoubleClick has or may use the net proceeds from the offering of the
Convertible Notes for general corporate purposes, including working capital to
fund anticipated operating losses, the expansion of DoubleClick's product
offerings, investments in new business products, technologies and markets,
capital expenditures, acquisitions or investments in complementary businesses,
products and technologies.

NOTE 5--STOCK SPLIT

      On March 11, 1999, DoubleClick's Board of Directors approved a two-for-one
Common Stock split in the form of a stock dividend for common stockholders of
record as of March 22, 1999 payable on April 2, 1999. All references to the
number of common shares and per share amounts in the financial statements and
notes thereto for all periods presented have been retroactively adjusted to
reflect the two-for-one split.


                                       12
<PAGE>

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

THE FOLLOWING DISCUSSION OF THE FINANCIAL CONDITION AND RESULTS OF OPERATIONS OF
DOUBLECLICK CONTAINS FORWARD-LOOKING STATEMENTS RELATING TO FUTURE EVENTS AND
THE FUTURE PERFORMANCE OF DOUBLECLICK WITHIN THE MEANING OF SECTION 27A OF THE
SECURITIES ACT OF 1933, AS AMENDED, AND SECTION 21E OF THE SECURITIES EXCHANGE
ACT OF 1934, AS AMENDED. STOCKHOLDERS ARE CAUTIONED THAT SUCH STATEMENTS INVOLVE
RISKS AND UNCERTAINTIES. DOUBLECLICK'S ACTUAL RESULTS AND TIMING OF CERTAIN
EVENTS COULD DIFFER MATERIALLY FROM THOSE ANTICIPATED IN THESE FORWARD-LOOKING
STATEMENTS AS A RESULT OF CERTAIN FACTORS, INCLUDING, BUT NOT LIMITED TO, THOSE
SET FORTH UNDER "RISK FACTORS THAT MAY AFFECT FUTURE RESULTS" AND ELSEWHERE IN
THIS REPORT AND IN DOUBLECLICK'S OTHER PUBLIC FILINGS MADE FROM TIME TO TIME
WITH THE SECURITIES AND EXCHANGE COMMISSION.

OVERVIEW

      References in this report to "DoubleClick", "we", "our" and "us" refer to
DoubleClick Inc., and it's subsidiaries. DoubleClick is a leading provider of
comprehensive Internet advertising solutions for advertisers and Web publishers
worldwide. DoubleClick currently has two principal service offerings.
DoubleClick Network (ad sales) provides fully-outsourced ad sales, delivery and
related services to publishers of highly-trafficked Web sites, including The
Dilbert Zone, Macromedia, Travelocity, Kelly Blue Book and U.S. News Online.
DoubleClick Network focuses on meeting the needs of Internet advertisers who
target users on a national, international and/or local basis. DoubleClick's DART
Service (ad serving), consisting of DART for Web publishers and the recently
introduced Closed Loop Marketing Solutions suite of products for advertisers and
ad agencies, provides Web publishers, advertisers and ad agencies with the
ability to control the targeting, delivery, measurement and analysis of their
online marketing campaigns on a real-time basis. DoubleClick Network and DART
Service lines of business are available to Web publishers and advertisers in
international markets. DoubleClick's proprietary DART technology, which
dynamically matches and delivers ads to the target audience within milliseconds,
is the platform for all of DoubleClick's solutions.

      DoubleClick completed its initial public offering in February 1998 and
received net proceeds of approximately $62.5 million. In December 1998,
DoubleClick received net proceeds of approximately $93.7 million from an
additional public offering. In March 1999, DoubleClick received net proceeds of
approximately $244.7 million from its issuance of $250 million principal amount
4 3/4% Convertible Subordinated Notes due in 2006. The net proceeds of these
transactions were added to DoubleClick's working capital and, pending their use,
DoubleClick has invested such funds in short-term, interest-bearing investment
grade obligations.

      DoubleClick offers advertising on DoubleClick Network to third party
advertisers with pricing generally determined on a CPM (cost per thousand ads
delivered) or cost per day basis. Discounts are offered based on a variety of
factors, including the duration and gross dollar amount of advertising
campaigns. Advertisements sold by DoubleClick are typically sold pursuant to
purchase order agreements, which are subject to cancellation.

      DoubleClick's revenues from DoubleClick Network are received from the
advertiser that orders the ad, and DoubleClick typically pays the Web publisher
(on whose Web site such advertisement is delivered) a service fee. This service
fee is calculated as a percentage of such advertising revenues, which amount is
included in cost of revenues. DoubleClick is responsible for billing and
collecting for ads delivered on DoubleClick Network, and typically assumes the
risk of non-payment from advertisers. In addition, DoubleClick earns service
fees for providing the DART Service to Web publishers and the Closed Loop
Marketing Solutions suite of products to Internet advertisers and ad agencies.


                                       13
<PAGE>

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

      Advertising revenues and DART service fees are generally recognized in the
period that the advertisement is delivered, provided that no significant
obligations remain and collection of the resulting receivable is probable.
DoubleClick also sells sponsorship advertising, which involves a greater degree
of integration among DoubleClick, the advertiser and the Web sites on
DoubleClick Network. These sponsorships are typically priced based on the length
of time that the sponsorship runs, rather than a CPM basis. Revenues relating to
sponsorship advertising are recognized ratably over the sponsorship period.

      DoubleClick expects that revenues generated from the DoubleClick Network
will continue to account for a substantial portion of DoubleClick's revenues for
the foreseeable future. Moreover, ads delivered on Web sites of the top four Web
publishers in DoubleClick Network accounted for approximately 19.0% of
DoubleClick's revenues for the three months ended March 31, 1999. DoubleClick
typically enters into short-term contracts with Web publishers for inclusion of
their Web sites in DoubleClick Network. The failure to successfully market
DoubleClick Network, the loss of one or more of the Web sites which account for
a significant portion of the Company's revenues from the DoubleClick Network, or
any reduction in traffic on such Web sites could have a material adverse effect
on DoubleClick's business, results of operations and financial condition.
Effective January 1, 1999, AltaVista, historically the largest DoubleClick
Network Publisher, became DoubleClick's largest DART customer. See "TRANSACTIONS
AFFECTING THE COMPARABILITY OF RESULTS OF OPERATIONS" below.

      To take advantage of the global reach of the Internet, DoubleClick has
established DoubleClick Networks in Europe, Asia and other international
markets. DoubleClick currently has operations in Australia, Canada, France,
Germany, United Kingdom, and Benelux (Belgium, Netherlands, and Luxembourg) and
through its business partners, in Japan, Iberoamerica, Italy and Scandinavia.
DoubleClick expects to continue to invest in building its international
operations.

      DoubleClick has incurred significant losses since its inception, and as of
March 31, 1999, had an accumulated deficit of $61.6 million, of which $36.6
million related to cumulative losses and $25.0 million related to the redemption
of shares of Common Stock from certain stockholders in connection with the
recapitalization of DoubleClick that occurred simultaneously with the completion
of a private placement of the Company's securities in June 1997. In addition,
DoubleClick recorded deferred compensation of $1.5 million, which represented
the difference between the exercise price and the fair market value of
DoubleClick's common stock issuable upon the exercise of certain stock options
granted to employees. The deferred compensation is being amortized over the
vesting periods of the related options. Of the total deferred compensation
amount, approximately $1.2 million has been amortized as of March 31, 1999.

      DoubleClick believes that quarter-to-quarter comparisons of its results of
operations should not be relied upon as an indication of future performance.
DoubleClick plans to significantly increase its operating expenses to increase
its sales and marketing operations, to continue its international expansion, to
upgrade and enhance its DART technology and to market and support its solutions.
DoubleClick may be unable to modify its planned spending quickly enough to
offset any unexpected revenue shortfall. If DoubleClick has a shortfall in
revenues in relation to its expenses, or if DoubleClick's expenses precede
increased revenues, then DoubleClick's results of operations and financial
condition may be materially and adversely affected. As a result of these
factors, there can be no assurance that DoubleClick will not incur significant
losses on a quarterly and annual basis for the foreseeable future.

TRANSACTIONS AFFECTING THE COMPARABILITY OF RESULTS OF OPERATIONS

      In December 1996, DoubleClick entered into a Procurement and Trafficking
Agreement with Digital Equipment Corporation (acquired by Compaq in June 1998)
pursuant to which DoubleClick had the exclusive right to sell and deliver all
advertising on specified pages within the AltaVista Web site. In accordance with
this agreement, DoubleClick paid AltaVista a service fee calculated as a
percentage of the revenues derived from the delivery of advertisements on or
through the AltaVista Web site.


                                       14
<PAGE>

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

      Effective January 1, 1999, DoubleClick changed its relationship with
Compaq by entering into an Advertising Services Agreement (the "AltaVista
Advertising Services Agreement") that superceded the Procurement and Trafficking
Agreement. Pursuant to the AltaVista Advertising Services Agreement, Compaq has
agreed to use DoubleClick's DART technology for ad delivery and to outsource to
DoubleClick certain ad sales functions for domestic, international, and local ad
sales. In consideration for such services performed by DoubleClick, Compaq pays
to DoubleClick (i) a DART Services fee for all advertising delivered by
DoubleClick on the AltaVista Web site, (ii) a sales commission based on the net
revenues generated from all advertisements sold by DoubleClick on behalf of
Compaq and (iii) a billing and collections fee for all billing and collections
services performed by DoubleClick on behalf of Compaq. Under the AltaVista
Advertising Services Agreement, the manner in which DoubleClick reports its
financial results related to the services it provides to the AltaVista Web site
has changed. Through December 31, 1998, DoubleClick recognized as revenues the
gross revenues related to ads delivered by DoubleClick to the AltaVista Web
site. Beginning January 1, 1999, pursuant to the AltaVista Advertising Services
Agreement, DoubleClick recognizes DART service fees, sales commissions and
billing and collection fees as revenues derived from the sale and delivery of
ads on the AltaVista Web site and associated services. As a result of this
change in relationship with AltaVista, overall gross margin percentage has
increased (no significant change in gross profit dollars) as DoubleClick is no
longer required to pay service fees to AltaVista for ads sold and delivered on
the AltaVista Web site and revenues include the fees earned for services
rendered. The AltaVista Advertising Services Agreement will expire on December
31, 2001, subject to prior termination in certain limited circumstances or
further extension in accordance with the terms of the AltaVista Advertising
Services Agreement.

RESULTS OF OPERATIONS

   Revenues
<TABLE>
<CAPTION>
                                  Three Months Ended March 31,
                                  ----------------------------
                                                                Dollar         Percentage
                                  1999           1998           Change           Change
                                  ----           ----           ------           ------
      <S>                        <C>            <C>             <C>               <C>
      System revenues (a)        $31,140        $13,004         18,136            139%
                                 =======        =======

      Revenues                   $22,087        $13,004          9,083             70%
      Cost of revenues            10,098          8,845          1,253             14%
                                 -------        -------

       Gross Profit              $11,989        $ 4,159          7,830            188%
                                 =======        =======
</TABLE>

      (a)   System revenues include revenues earned by DoubleClick with respect
            to network sales relating to publishers which are part of the
            DoubleClick Network, fees earned from independent publishers and
            advertisers which use the DART technology to deliver ad impressions,
            and amounts invoiced on behalf of Compaq Computer Corp. pursuant to
            the Procurement and Trafficking Agreement (in place from December
            1996 to December 1998). System revenues for three months ended March
            31, 1999 exclude DART service fees, sales commissions and billing
            and collection fees owed by Compaq Computer Corp. pursuant to the
            AltaVista Advertising Services Agreement (effective January 1,
            1999).

      Revenues increased to $22.1 million for the three months ended March 31,
1999, compared to $13.0 million for the three months ended March 31, 1998. The
increase in revenues was primarily due to an increase in the number of
advertisers and ads delivered on the DoubleClick Network as well as an increase
in total DART fees earned from publishers and advertisers, offset in part by
lower average price per advertisement. Revenues derived from advertising
impressions delivered to users of the AltaVista Web site represented 21.1% and
50.9% of DoubleClick's revenues and 43.4% and 50.9% of DoubleClick's


                                       15
<PAGE>


systems revenues for the three months ended March 31, 1999 and 1998,
respectively. No other Web site accounted for more than 10% revenues during the
three month's ended March 31, 1999 and 1998, and no one advertiser accounted for
10% of revenues during the same periods. Revenues derived from advertising
impressions delivered to users of the AltaVista Web site has and will continue
to represent a significant portion of DoubleClick's revenues. The provision for
advertiser discounts increased to $1.4 million for the three months ended March
31, 1999, compared to $311 thousand for the three months ended March 31, 1998.
The increase in the provision for advertiser discounts is commensurate with the
increase in revenues and the level of business activity.



                                       16
<PAGE>

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

      Cost of Revenues

      Cost of revenues consists primarily of service fees paid to Web publishers
for ads delivered to the Web sites on the DoubleClick Network. Cost of revenues
also includes other costs of delivering advertisements, including depreciation
of the ad delivery system, facilities and personnel-related costs incurred to
operate our ad delivery system and Internet access costs. Gross margin as a
percent of revenues increased to 54.3% for the three months ended March 31,
1999, compared to 32.0% for the three months ended March 31, 1998. The increase
in gross margin percent was primarily the result of an increase in revenues from
its higher margin DART services as a percentage of total revenues, including the
impact of the AltaVista Advertising Service Agreement.

      Operating Expenses

<TABLE>
<CAPTION>
                                                                  Three Months Ended March 31,
                                        ----------------------------------------------------------------------------
                                                                          Percentage of             Percentage of
                                                 Total                     Revenues(a)            System Revenues(a)
                                        ----------------------------------------------------------------------------
                                          1999           1998           1999         1998         1999         1998
                                          ----           ----           ----         ----         ----         ----
      <S>                               <C>            <C>              <C>          <C>          <C>          <C>
      Sales and Marketing ......        $11,057        $ 5,624          50.1%        43.2%        35.5%        43.2%

      General and Administrative          4,265          2,349          19.3%        18.1%        13.7%        18.1%

      Product Development ......          3,611          1,025          16.3%         7.9%        11.6%         7.9%
</TABLE>

      (a)   All references to revenues take into consideration the change in
            relationship with Compaq, as discussed above.


      Sales and Marketing. Sales and marketing expenses consist primarily of
salaries, commissions, advertising, trade show expenses, seminars and costs of
marketing materials. Sales and marketing expenses increased to $11.1 million for
the three months ended March 31, 1999, compared to $5.6 million for the three
months ended March 31, 1998. The increase was primarily attributable to the
increase in sales personnel and costs associated with the expansion of
international operations of approximately $4.6 million, commissions associated
with the increase in revenues of approximately $700 thousand and costs related
to the continued development and implementation of DoubleClick's marketing and
branding campaigns. Moreover, DoubleClick expects sales and marketing expenses
to increase on an absolute dollar basis but decrease as a percentage of revenues
as DoubleClick hires additional personnel, expands into new markets and
continues to promote DoubleClick brand.

      General and Administrative. General and administrative expenses consist
primarily of compensation and professional service fees and related supplies and
materials. General and administrative expenses increased to $4.3 million for the
three months ended March 31, 1999, compared to $2.3 million for the three months
ended March 31, 1998. The increase was primarily due to costs associated with
increased personnel of approximately $1.4 million and increased professional
fees of approximately $400 thousand. In addition, the provision for doubtful
accounts increased to $307 thousand for the three months ended March 31, 1999,
compared to $219 thousand for the three months ended March 31, 1998. The
increase in the provision for doubtful accounts is commensurate with the
increase in revenues and the level of business activity. DoubleClick expects
general and administrative expenses to increase on an absolute dollar basis but
decrease as a percentage of revenues as DoubleClick hires additional personnel
and incurs additional costs related to the growth of its business.


      Product Development. Product development expenses consist primarily of
compensation and consulting expenses and enhancements to the DART technology. To
date, all product development costs have been expensed as incurred. Product
development expenses increased to $3.6 million for the three months ended March
31, 1999, compared to $1.0 million for the three months ended March 31, 1998.
The increase was due primarily to increases


                                       17
<PAGE>

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS


in product development personnel and related expenses of approximately $2.0
million and consulting and other miscelleneous expenses. DoubleClick believes
that continued investment in product development is critical to attaining its
strategic objectives and, as a result, expects product development expenses to
increase on an absolute dollar basis but remain relatively constant as a
percentage of revenues.

      Facility Relocation and Other. During the three months ended March 31,
1999, DoubleClick recorded a charge of $1.6 million for expenses related to its
planned move to a new headquarters facility. The move, expected to be completed
on or about November 30, 1999, will consolidate two leased facilities in New
York, in which DoubleClick's executive offices and principal operations are
located, into approximately 150,000 square feet of office space located at 450
West 33rd Street, New York, New York. The charge relates primarily to the
write-down of fixed assets of approximately $1.4 million (primarily leasehold
improvements) that will be abandoned and not relocated to DoubleClick's new
headquarters building. DoubleClicks's management made an assessment of the
carrying value of the assets to be disposed of and determined that their
carrying value was in excess of their estimated fair value. The estimated fair
value of the assets was determined based on an estimate of the recoverability of
the assets carrying amount over their remaining useful life to the abandonment
date using their initial cost recovery rate. The other components of Facility
relocation and other include duplicative rental amounts and moving costs of
approximately $270,000 and $11,000, respectively, for the three months ended
March 31, 1999. Duplicative rental and moving costs are expensed in the period
incurred. Depreciation and amortization of $243 thousand associated with the
assets to be disposed of are presented outside of Facility relocation and other
in the Consolidated Statement of Operations.


      Interest Income (Expense)

      Net interest income increased to $1.7 million for the three months ended
March 31, 1999, compared to net interest income of $412,000 for the three months
ended March 31, 1998. The increase in net interest income was attributable to an
increase in cash, cash equivalents and short-term investments as a result of the
net proceeds received by DoubleClick from its additional public offering of
common stock in December 1998 and issuance of its 4 3/4% Convertible
Subordinated Notes in March 1999, offset in part by interest expense associated
with the 4 3/4% Convertible Subordinated Notes.

      Net Loss

      DoubleClick's net loss increased to $6.9 million for the three months
ended March 31, 1999, compared to $4.4 million for the three months ended March
31, 1998. The increase in the net loss was primarily due to expenses related to
DoubleClick's planned move to a new headquarters facility in addition to the
hiring of additional personnel (particularly in sales and marketing and product
development), offset in part by an increase in interest income.

FINANCIAL CONDITION AND LIQUIDITY

      Financial Condition

      As of March 31, 1999, DoubleClick had $331.9 million of cash and cash
equivalents and $39.3 million in short-term investments. As of March 31, 1999,
DoubleClick's principal commitments consist of $250 million of 4 3/4%
Convertible Subordinated Notes due 2006 and operating and capital lease
obligations.

      Management anticipates that it will experience a substantial increase in
its capital expenditures and lease commitments consistent with its anticipated
growth in operations, infrastructure and personnel, and the scheduled build-out
of its newly leased New York headquarters facilities. DoubleClick currently
anticipates that it will continue to experience significant growth in its
operating expenses for the foreseeable future and that its operating expenses
will be a material use of DoubleClick's cash resources. DoubleClick believes
that its existing cash and cash equivalents and short-term investments will be
sufficient to meet its anticipated cash needs for working capital and capital
expenditures for at least the next twelve months.


                                       18
<PAGE>

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

      Convertible Subordinated Notes

      On March 17, 1999, DoubleClick issued 4 3/4% Convertible Subordinated
Notes due 2006 with a principal amount of $250 million (the "Convertible
Notes"). The Convertible Notes are convertible into DoubleClick's common stock
at a conversion price of $165.00 per share, subject to adjustment in certain
events and at the holders' option. Interest on the Convertible Notes is payable
semiannually in arrears on March 15 and September 15 of each year, commencing on
September 15, 1999. The Convertible Notes are unsecured and are subordinated to
all existing and future Senior Indebtedness (as defined in the Convertible Notes
indenture) of DoubleClick. If certain events occur (as described in the
Convertible Notes indenture), the Convertible Notes may be redeemed at the
option of DoubleClick, in whole or in part, beginning on March 20, 2001 at the
redemption prices set forth in the Convertible Notes indenture.

      DoubleClick is obligated to file by May 21, 1999, a shelf registration
statement covering resales of the Convertible Notes and the common stock
issuable upon conversion of the Convertible Notes.

      Upon occurrence of a Designated Event (as defined in the Convertible Notes
indenture) prior to the maturity of the Convertible Notes, each holder of the
Convertible Notes has the right to require DoubleClick to redeem all or any part
of the holder's Convertible Notes at a price equal to 100% of the principal
amount, plus any accrued interest, of the Convertible Notes being redeemed.

      DoubleClick has or may use the net proceeds from the offering of the
Convertible Notes for general corporate purposes, including working capital to
fund anticipated operating losses, the expansion of DoubleClick's core business,
investments in new business segments and markets, capital expenditures,
acquisitions or investments in complementary businesses, products and
technologies.

      Cash Flows

      Net cash used in operating activities equaled $8.0 million for the three
months ended March 31, 1999, compared to $4.2 million for the three months ended
March 31, 1998. Cash used in operating activities for the three months ended
March 31, 1999 resulted from net losses, decreases in accounts payable and
accrued liabilities and an increase in prepaid expenses and other current
assets; which were partially offset by a decrease in accounts receivable and an
increase in deferred revenues.

      Net cash used in investing activities equaled $32.5 million for the three
months ended March 31, 1999, compared to net cash provided by investing
activities of $800,000 for the three months ended March 31, 1998. Cash used in
investing activities for the three months ended March 31, 1999 resulted from
purchases of property and equipment, and purchases, sales and maturities of
short-term investments.

      Net cash provided by financing activities equaled $245.5 million for the
three months ended March 31, 1999, compared to $62.7 million for the three
months ended March 31, 1998. Cash provided by financing activities for the three
months ended March 31, 1999 consisted primarily of net proceeds received by
DoubleClick in connection with the issuance of the Convertible Notes in March
1999.


                                       19
<PAGE>

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

Y2000

Overview

      Currently installed computer systems and software products are coded to
accept or recognize only two digit entries in the date code field. These systems
and software products will need to accept four digit entries to distinguish 21st
century dates from 20th century dates. As a result, computer systems and/or
software used by many companies and governmental agencies may need to be
upgraded to comply with such Year 2000 requirements or risk system failure or
miscalculations causing disruptions of normal business activities.

      STATE OF READINESS. DoubleClick has generally completed its initial
assessment of the Year 2000 readiness of its information technology ("IT")
systems, including the hardware and software that enable DoubleClick to provide
and deliver its solutions, and its non-IT systems. DoubleClick's assessment plan
consists of (i) quality assurance testing of its internally developed
proprietary software incorporated in its solutions ("Solutions Software"); (ii)
contacting third-party vendors and licensors of material hardware, software and
services that are both directly and indirectly related to the delivery of
DoubleClick's solutions to its Web publisher and advertiser customers; (iii)
contacting vendors of material non-IT systems; (iv) assessment of repair or
replacement requirements; (v) repair or replacement; (vi) implementation; and
(vii) creation of contingency plans in the event of Year 2000 failures.

      DoubleClick is conducting quality assurance testing to ensure Year 2000
compliance of all new internally developed proprietary code incorporated into
its Solutions Software. DoubleClick plans to perform a Year 2000 simulation on
its Solutions Software during the second quarter of 1999. Based on the results
of its Year 2000 simulation test, DoubleClick intends to revise the code of its
Solutions Software as necessary to improve the Year 2000 compliance of its
Solutions Software.

      DoubleClick has been informed by many of its vendors of material hardware
and software components of its IT systems that the products used by DoubleClick
are currently Year 2000 compliant. DoubleClick is continuing the process of
requiring vendors of the other material hardware and software components in its
IT systems to provide assurances of their Year 2000 compliance. DoubleClick
plans to complete this process during the first half of 1999. DoubleClick has
completed an assessment of the materiality of its non-IT systems and is
continuing the process of seeking assurances of Year 2000 compliance from
providers of its material non-IT systems. In addition, DoubleClick, like all
businesses, is dependent on the continued functioning, domestically and
internationally, of basic services such as electrical utilities, telephony, mail
delivery, and transportation in order to conduct its business. While DoubleClick
is taking steps to attempt to ensure that the third parties on which it is
reliant are Year 2000 compliant, it cannot predict the likelihood of such
compliance nor the direct or indirect costs to DoubleClick of non-compliance by
those third parties or of securing alternate services from Year 2000 compliant
parties.

      Pending completion of its planned Year 2000 simulation test of its
Solutions Software and its program of requesting Year 2000 assurances from
vendors and licensors of material IT and non-IT systems, DoubleClick has not yet
completed its Year 2000 compliance repair or replacement analysis, or of its
contingency plans.

      COSTS. To date, DoubleClick has not incurred any material expenditures in
connection with identifying or evaluating Year 2000 compliance issues. Most of
its expenses have related to, and are expected to include, the operating costs
associated with time spent by employees in the evaluation process and Year 2000
compliance matters generally. At this time, DoubleClick does not possess the
information necessary to estimate the potential costs of revisions to its
Solutions Software should such revisions be required or the replacement of
third-party software, hardware or services that are determined not to be Year
2000 compliant. Although DoubleClick does not anticipate that such expenses will
be material, such expenses, if higher than anticipated, could have a material
adverse effect on DoubleClick's business, results of operations and financial
condition.


                                       20
<PAGE>

ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

      RISKS. DoubleClick believes that it has established an effective program
to resolve material Year 2000 issues in its sole control in a timely manner. As
noted above, however, DoubleClick has not yet completed all phases of its
program and is dependent on third parties whose progress is not within its
control. The failure by such third parties to be Year 2000 compliant could
result in a systematic failure beyond the control of DoubleClick from delivering
its services to its customers, decrease the use of the Internet or prevent users
from accessing the Web sites of its Web publishers customers, which could have
material adverse effect on DoubleClick's business, results of operations and
financial condition. In addition, there can be no assurance that DoubleClick
will not discover Year 2000 compliance problems in our Solutions Software that
will require substantial revisions which could be costly and time-consuming to
remedy. In the event that DoubleClick does not complete any of its currently
planned additional remediation prior to the Year 2000, DoubleClick could
experience significant difficulty in producing and delivering solutions and
conducting its business in the Year 2000 as it has in the past, which could
result in lost revenues, increased operating costs, the loss of customers and
other business interruptions, any of which could have a material adverse effect
on DoubleClick's business, results of operations and financial condition.
Moreover, the failure to adequately address Year 2000 compliance issues could
result in claims of mismanagement, misrepresentation or breach of contract and
related litigation, which could be costly and time-consuming to defend. The
amount of potential liability and lost revenue cannot be reasonably estimated at
this time.

      CONTINGENCY PLAN. As discussed above, DoubleClick is engaged in an ongoing
Year 2000 assessment and has not yet developed any contingency plans. The
results of DoubleClick's Year 2000 simulation testing and the responses received
from third-party vendors and service providers will be taken into account in
determining the nature and extent of any contingency plans.

      FORWARD-LOOKING STATEMENTS. The foregoing Year 2000 discussion and the
information contained herein is provided as a "Year 2000 Readiness Disclosure"
as defined in the Year 2000 Information and Readiness Disclosure Act of 1998
(Public Law 105-271, 112 Stat. 2386) enacted on October 19, 1998 and contains
"forward-looking statements" within the meaning of the Private Securities
Litigation reform Act of 1995. Such statements, including without limitation,
anticipated costs and the dates by which DoubleClick expects to complete certain
actions, are based on management's best current estimates, which were derived
utilizing numerous assumptions about future events, including the continued
availability of certain resources, representations received from third parties
and other factors. However, there can be no guarantee that these estimates will
be achieved, and actual results could differ materially form those anticipated.
Specific factors that might cause such material difference include, but are not
limited to, the ability to identify and remediate all relevant systems, results
of Year 2000 testing, adequate resolution of Year 2000 issues by governmental
agencies, businesses and other third parties who are outsourcing service
providers, suppliers, and vendors of DoubleClick, unanticipated system costs,
the adequacy of and ability to implement contingency plans and uncertainties.
The "forward-looking statements" made in the foregoing Year 2000 discussion
speak only as of the date on which such statements are made, and DoubleClick
undertakes no obligation to update any forward-looking statement to reflect
events or circumstances after the date on which such statement is made or to
reflect the occurrence of unanticipated events.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

Interest Rate Risk


      The primary objective of DoubleClick's investment activities is to
preserve principal while at the same time maximizing yields without
significantly increasing risk. To achieve this objective, DoubleClick maintains
its portfolio of cash equivalents and short-term investments in a variety of
securities, including both government and corporate obligations and money market
funds. As of March 31, 1999, approximately 96% of the Company's total portfolio
matures in one year or less, with the remainder maturing in less than two years.


      The following table presents the amounts of DoubleClick's cash equivalents
and short-term investments that are subject to interest rate risk by year of
expected maturity and average interest rates as of March 31, 1999:


                                       21
<PAGE>


<TABLE>
<CAPTION>
                                        Through     Through
                                       March 31,    March 31,                     Fair
                                         2000         2001         Total         Value
                                       ---------    ---------    ---------     ---------
                                                   (Dollars in thousands)
<S>                                    <C>          <C>          <C>           <C>
Cash equivalents and short-term
  investments ...................      $347,985     $15,452      $363,437      $363,437
Average interest rates ..........         4.9%         5.3%
</TABLE>



      DoubleClick did not hold derivative financial instruments as of March 31,
1999 and has never held such instruments in the past. As of March 31, 1999,
DoubleClick had outstanding $250 million of convertible subordinated notes due
2006 with a fixed interest rate of 4.75%.


Foreign Currency Risk


      Foreign currency risk related to the Company's international sales are
derived mostly from the Company's delivery of advertising impressions through
third-party Web Sites that are a part of DoubleClick's U.S. or International
Networks and are typically denominated in the local currency of each country.
These subsidiaries also incur most of their expenses in the local currency.
Accordingly, all foreign subsidiaries use the local currency as their functional
currency.

      The Company's international business is subject to risks typical of an
international business, including, but not limited to differing economic
conditions, changes in political climate, differing tax structures, other
regulations and restrictions, and foreign exchange rate volatility. Accordingly,
the Company's future results could be materially adversely impacted by changes
in these or other factors.

      The Company is also exposed to foreign exchange rate fluctuations,
primarily with respect to the British Pound and the Euro, as the financial
results of foreign subsidiaries are translated into U.S. dollars in
consolidation. As exchange rates vary, these results, when translated, may vary
from expectations and adversely impact overall expected profitability. The
effect of foreign exchange rate fluctuations on the Company in the quarter ended
March 31, 1999 was not material.



                                       22
<PAGE>

THIS REPORT CONTAINS FORWARD-LOOKING STATEMENTS BASED ON OUR CURRENT
EXPECTATIONS, ASSUMPTIONS, ESTIMATES AND PROJECTIONS ABOUT DOUBLECLICK AND OUR
INDUSTRY. THESE FORWARD-LOOKING STATEMENTS INVOLVE RISKS AND UNCERTAINTIES.
DOUBLECLICK'S ACTUAL RESULTS COULD DIFFER MATERIALLY FROM THOSE ANTICIPATED IN
SUCH FORWARD-LOOKING STATEMENTS AS A RESULT OF CERTAIN FACTORS, AS MORE FULLY
DESCRIBED IN THIS SECTION AND ELSEWHERE IN THIS REPORT. DOUBLECLICK UNDERTAKES
NO OBLIGATION TO UPDATE PUBLICLY ANY FORWARD-LOOKING STATEMENTS FOR ANY REASON,
EVEN IF NEW INFORMATION BECOMES AVAILABLE OR OTHER EVENTS OCCUR IN THE FUTURE.

LIMITED OPERATING HISTORY

      We were incorporated in January 1996 and have a limited operating history.
An investor in our common stock must consider the risks and difficulties
frequently encountered by early stage companies in new and rapidly evolving
markets, including the Internet advertising market. These risks include our:

      -     ability to sustain historical revenue growth rates;

      -     dependence on a continuing relationship with AltaVista;

      -     reliance on the DoubleClick Network;

      -     need to manage our expanding operations;

      -     competition;

      -     ability to attract, retain and motivate qualified personnel;

      -     ability to maintain our current, and develop new, strategic
            relationships with Web publishers;

      -     ability to anticipate and adapt to the changing Internet market; and

      -     ability to attract and retain a large number of advertisers from a
            variety of industries.

      We also depend on the growing use of the Internet for advertising,
commerce and communication, and on general economic conditions. We cannot assure
you that our business strategy will be successful or that we will successfully
address these risks. Please see "Management's Discussion and Analysis of
Financial Condition and Results of Operations" for detailed information on our
limited operating history.

HISTORY OF LOSSES AND ANTICIPATION OF CONTINUED LOSSES

      We incurred net losses of $3.2 million for the period from January 23,
1996 (inception) through December 31, 1996, $8.4 million for the year ended
December 31, 1997, and $18.2 million for the year ended December 31, 1998. For
the three months ended March 31, 1999 we incurred a net loss of $6.9 million
and, as of March 31, 1999, our accumulated deficit was $61.6 million. We have
not achieved profitability and expect to continue to incur operating losses at
least into the year 2000. We expect to continue to incur significant operating
and capital expenditures and, as a result, we will need to generate significant
revenues to achieve and maintain profitability. Although our revenues have grown
in recent quarters, we cannot assure you that we will achieve sufficient
revenues for profitability. Even if we do achieve profitability, we cannot
assure you that we can sustain or increase profitability on a quarterly or
annual basis in the future. If revenues grow slower than we anticipate, or if
operating expenses exceed our expectations or cannot be adjusted accordingly,
our business, results of operations and financial condition will be materially
and adversely affected.


                                       23
<PAGE>

OUR DEPENDENCE ON ALTAVISTA

      Approximately 21.1% and 50.9% of revenues and 43.4% and 50.9% of systems
revenues for the three months ended March 31, 1999 and 1998, respectively,
resulted from advertisements delivered on or through the AltaVista Web site. On
January 20, 1999, DoubleClick agreed with Compaq to enter into an Advertising
Services Agreement to replace the existing Procurement and Trafficking
Agreement. The Advertising Services Agreement is effective as of January 1, 1999
and will expire on December 31, 2001, subject to prior termination in certain
limited circumstances or further extension in accordance with the terms of the
Advertising Services Agreement. The loss of AltaVista or any significant
reduction in traffic on or through the AltaVista Web site would materially and
adversely affect our business, results of operations and financial condition.

WEB PUBLISHER CONCENTRATION

      We derive a substantial portion of our DoubleClick Network revenues from
ads we deliver on the Web sites of a limited number of Web publishers.
Approximately 19.0% of our revenues for the three months ended March 31, 1999
and approximately 63.4% of our revenues for the three months ended March 31,
1998 resulted from ads delivered on the Web sites of the top four Web publishers
on the DoubleClick Network. Our business, results of operations and financial
condition could be materially and adversely affected by the loss of one or more
of the Web publishers which account for a significant portion of our DoubleClick
Network revenues or any significant reduction in traffic on such Web publisher's
Web sites. In addition, advertisers or Web publishers may leave the DoubleClick
Network because of such a loss, which could materially and adversely affect our
business, results of operations and financial condition. Typically we enter into
short-term contracts with Web publishers for inclusion of their Web sites in the
DoubleClick Network. Since these contracts are short-term, we will have to
negotiate new contracts or renewals in the future which may have terms that are
not as favorable to us as the terms of the existing contracts. Our business,
results of operations and financial condition could be materially and adversely
affected by such new contracts or renewals.

OUR RELIANCE ON THE DOUBLECLICK NETWORK

      Since the third quarter of 1996, we have derived substantially all of our
revenues from advertisements we deliver to Web sites on the DoubleClick Network.
We expect that the DoubleClick Network will continue to account for a
substantial portion of our revenues for the foreseeable future. The DoubleClick
Network consists of Web sites of a limited number of Web publishers with which
we have short-term contracts. We cannot assure you that such Web publishers will
remain associated with the DoubleClick Network, that any DoubleClick Network Web
site will maintain consistent or increasing levels of traffic over time, or that
we will be able to timely or effectively replace any exiting DoubleClick Network
Web site with other Web sites with comparable traffic patterns and user
demographics. Our failure to successfully market the DoubleClick Network, the
loss of one or more of the Web publishers which account for a significant
portion of our revenues from the DoubleClick Network, or the failure of the Web
sites on the DoubleClick Network to maintain consistent or increasing levels of
traffic would materially and adversely affect our business, results of
operations and financial condition

QUARTERLY OPERATING RESULTS ARE SUBJECT TO SIGNIFICANT FLUCTUATIONS

      Our revenues and operating results may vary significantly from quarter to
quarter due to a number of factors, not all of which are in our control. These
factors include:

      -     advertiser and Web publisher demand for our solutions;

      -     user traffic levels and the number of available impressions on the
            DoubleClick Network's Web sites;

      -     seasonal fluctuations in Internet usage;

      -     changes in service fees we pay to Web publishers;

      -     changes in the growth rate of Internet usage;

      -     the commitment of advertising budgets to Internet advertising;


                                       24
<PAGE>

      -     the mix of revenues from our various Internet advertising solutions;

      -     the timing and amount of costs relating to the expansion of our
            operations;

      -     changes in our pricing policies or those of our competitors;

      -     the introduction of new solutions by us or our competitors;

      -     the mix of domestic and international sales;

      -     costs related to acquisitions of technology or businesses; and

      -     general economic and market conditions.

      Our revenues for the foreseeable future will remain dependent on user
traffic levels and advertising activity on the DoubleClick Network. Such future
revenues are difficult to forecast. In addition, we plan to significantly
increase our operating expenses to increase our sales and marketing operations,
to continue our international expansion, to upgrade and enhance our DART
technology, and to market and support our solutions. We may be unable to adjust
spending quickly enough to offset any unexpected revenue shortfall. If we have a
shortfall in revenues in relation to our expenses, or if our expenses precede
increased revenues, then our business, results of operations and financial
condition would be materially and adversely affected. Such a result would likely
affect the market price of our common stock in a manner which may be unrelated
to our long-term operating performance.

      We believe that advertising sales in traditional media, such as television
and radio, generally are lower in the first calendar quarter of each year. If
our market makes the transition from an emerging to a more developed medium,
seasonal and cyclical patterns may develop in our industry. Our revenues may
also be affected by seasonal and cyclical patterns in Internet advertising
spending if they emerge.

      Due to all of the foregoing factors and the other risks discussed in this
section, you should not rely on quarter-to-quarter comparisons of our results of
operations as an indication of future performance. It is possible that in some
future periods our results of operations may be below the expectations of public
market analysts and investors. In this event, the price of our common stock may
fall.

NEED TO MANAGE GROWTH

      To successfully implement our business plan in the rapidly evolving market
for Internet advertising requires an effective planning and management process.
We continue to increase the scope of our operations both domestically and
internationally, and we have grown our workforce substantially. As of March 31,
1996, we had a total of 13 employees and, as of March 31, 1999, we had a total
of 549 employees. In addition, we plan to continue to expand our sales and
marketing and customer support organizations both domestically and
internationally. This growth has placed, and our anticipated future growth in
our operations will continue to place, a significant strain on our management
systems and resources. We expect that we will need to continue to improve our
financial and managerial controls and reporting systems and procedures, and will
need to continue to expand, train and manage our workforce. Our future
performance may also depend on the effective integration of acquired businesses.
Such integration, even if successful, may take a significant period of time and
expense, and may place a significant strain on our resources. Our business,
results of operations and financial condition will be materially and adversely
affected if we are unable to effectively manage our expanding operations or the
relocation of our data operations.

RECENT DEVELOPMENT OF THE INTERNET ADVERTISING MARKET AND UNPROVEN ACCEPTANCE
AND EFFECTIVENESS OF WEB ADVERTISING

      Our future success is highly dependent on an increase in the use of the
Internet as an advertising medium. The Internet advertising market is new and
rapidly evolving, and it cannot yet be compared with traditional advertising
media to gauge its effectiveness. As a result, demand and market acceptance for
Internet advertising solutions is uncertain. Most of our current or potential
advertising customers have little or no experience using the Internet for
advertising purposes and they have allocated only a limited portion of their
advertising budgets to Internet advertising. The adoption of Internet
advertising,


                                       25
<PAGE>

particularly by those entities that have historically relied upon traditional
media for advertising, requires the acceptance of a new way of conducting
business, exchanging information and advertising products and services. Such
customers may find Internet advertising to be less effective for promoting their
products and services relative to traditional advertising media. In addition,
most of our current and potential Web publisher customers have little or no
experience in generating revenues from the sale of advertising space on their
Web sites. We cannot assure you that the market for Internet advertising will
continue to emerge or become sustainable. If the market for Internet advertising
fails to develop or develops more slowly than we expect, then our business,
results of operations and financial condition could be materially and adversely
affected.

      There are currently no standards for the measurement of the effectiveness
of Internet advertising and standard measurements may need to be developed to
support and promote Internet advertising as a significant advertising medium.
Our advertising customers may challenge or refuse to accept our or third-party
measurements of advertisement delivery results, and our customers may not accept
any errors in such measurements. In addition, the accuracy of database
information used to target advertisements is essential to the effectiveness of
Internet advertising that may be developed in the future. The information in our
database, like any database, may contain inaccuracies which our customers may
not accept.

      Substantially all of our revenues are derived from the delivery of banner
advertisements. If advertisers determine that banner advertising is an
ineffective or unattractive advertising medium, we cannot assure you that we
will be able to effectively make the transition to any other form of Internet
advertising. Also, there are "filter" software programs that limit or prevent
advertising from being delivered to a user's computer. The commercial viability
of Internet advertising, and our business, results of operations and financial
condition, would be materially and adversely affected by Web users' widespread
adoption of such software.

PRIVACY CONCERNS

      In recent months, the U.S. federal and various state governments have
proposed limitations on the collection and use of information regarding Internet
users. In October 1998, the European Union adopted a directive that may result
in limitations on our collection and use of information regarding Internet users
in Europe. Our DART technology targets advertising to users through the use of
"cookies" and other non-personally-identifying information. The effectiveness of
our DART technology could be limited by any regulation or limitation in the
collection or use of information regarding Internet users. Since many of the
limitations are still in the proposal stage, we cannot yet determine the full
impact of these regulations on our business.

UNPROVEN BUSINESS MODEL

      Our business model is to generate revenues solely by providing Internet
advertising solutions to advertisers, ad agencies and Web publishers. The profit
potential for our business model is unproven. To be successful, both Internet
advertising and our solutions will need to achieve broad market acceptance by
advertisers, ad agencies and Web publishers. Our ability to generate significant
revenues from advertisers will depend, in part, on our ability to contract with
Web publishers that have Web sites with adequate available ad space inventory.
Further, these Web sites must generate sufficient user traffic with demographic
characteristics attractive to our advertisers. The intense competition among
Internet advertising sellers has led to the creation of a number of pricing
alternatives for Internet advertising. These alternatives make it difficult for
us to project future levels of advertising revenues and applicable gross margin
that can be sustained by us or the Internet advertising industry in general.

      Market acceptance of our new solutions, including DoubleClick Local and
the Closed Loop Marketing Solutions suite of products, will depend on the
continued emergence of Internet commerce, communication and advertising, and
market demand for our solutions. We cannot assure you that the market for our
new solutions will develop or that demand for our new solutions will emerge or
become sustainable.

YEAR 2000 RISKS

      Currently installed computer systems and software products are coded to
accept or recognize only two digit entries in the date code field. These systems
and software products will need to accept four digit entries to distinguish 21st
century dates from 20th century dates. As a result, computer systems and/or
software used by many companies and governmental agencies may need to be
upgraded to comply with such Year 2000 requirements or risk system failure or
miscalculations causing disruptions of normal business activities.


                                       26
<PAGE>

      We have generally completed our preliminary assessment of our Year 2000
readiness. We plan to perform a Year 2000 simulation on our software during the
second quarter of 1999, following the implementation of revisions to our
software contemplated in the first quarter of 1999. We are also in the process
of contacting certain third-party vendors, licensors and providers of software,
hardware and services regarding their Year 2000 readiness. Following this
testing and after contacting these vendors and licensors, we will be better able
to make a complete evaluation of our Year 2000 readiness, to determine what
costs will be necessary to be Year 2000 compliant, and to determine whether
contingency plans need to be developed.

RISK OF SYSTEM FAILURE

      The DART technology resides on a computer system located in our New York
City offices and in DoubleClick data centers in New Jersey, California,
Australia, Brazil, England, France, Germany, Netherlands and Sweden. This
system's continuing and uninterrupted performance is critical to our success.
Customers may become dissatisfied by any system failure that interrupts our
ability to provide our services to them, including failures affecting our
ability to deliver advertisements without significant delay to the viewer.
Sustained or repeated system failures would reduce the attractiveness of our
solutions to advertisers, ad agencies and Web publishers. Slower response time
or system failures may also result from straining the capacity of our deployed
software or hardware due to an increase in the volume of advertising delivered
through our servers. To the extent that we do not effectively address any
capacity constraints or system failures, our business, results of operations and
financial condition would be materially and adversely affected.

      Our operations are dependent on our ability to protect our computer
systems against damage from fire, power loss, water damage, telecommunications
failures, vandalism and other malicious acts, and similar unexpected adverse
events. In addition, interruptions in our solutions could result from the
failure of our telecommunications providers to provide the necessary data
communications capacity in the time frame we require. Despite precautions we
have taken, unanticipated problems affecting our systems have from time to time
in the past caused, and in the future could cause, interruptions in the delivery
of our solutions. DoubleClick's ad serving capabilities, operational information
and data storage are presently redundant, as well as archived. We expect all of
our back-end systems for disaster recovery to be fully redundant by the second
quarter of 1999. Our business, results of operations and financial condition
could be materially and adversely affected by any damage or failure that
interrupts or delays our operations.

OUR MARKETS ARE HIGHLY COMPETITIVE

      Our markets, namely Internet advertising and related products and
services, are intensely competitive. We expect such competition to continue to
increase because our markets pose no substantial barriers to entry. Competition
may also increase as a result of industry consolidation. We believe that our
ability to compete depends upon many factors both within and beyond our control,
including the following:

      -     the timing and market acceptance of new solutions and enhancements
            to existing solutions developed either by us or our competitors;

      -     customer service and support efforts;

      -     sales and marketing efforts; and

      -     the ease of use, performance, price and reliability of solutions
            developed either by DoubleClick or its competitors.

      We compete for Internet advertising revenues with large Web publishers and
Web search engine companies, such as America Online, Excite, Lycos, Microsoft,
Infoseek and Yahoo!. Further, our DoubleClick Network competes with a variety of
Internet advertising networks, including 24/7 Media. In marketing our
DoubleClick Network and DART Service to Web publishers, we also compete with
providers of ad servers and related services, including NetGravity and AdForce.
We also encounter competition from a number of other sources, including content
aggregation companies, companies engaged in advertising sales networks,
advertising agencies, and other companies which facilitate Internet advertising.

      Many of our existing competitors, as well as a number of potential new
competitors, have longer operating histories, greater name recognition, larger
customer bases and significantly greater financial, technical and marketing
resources than we do. These factors may allow them to respond more quickly than
we can to new or emerging technologies and changes in customer requirements. It
may also allow them to devote greater resources than we can to the development,
promotion and sale of their


                                       27
<PAGE>

products and services. Such competitors may also engage in more extensive
research and development, undertake more far-reaching marketing campaigns, adopt
more aggressive pricing policies and make more attractive offers to existing and
potential employees, strategic partners, advertisers and Web publishers. We
cannot assure you that our competitors will not develop products or services
that are equal or superior to our solutions or that achieve greater market
acceptance than our solutions. In addition, current and potential competitors
have established or may establish cooperative relationships among themselves or
with third parties to increase the ability of their products or services to
address the needs of our prospective advertising, ad agency and Web publisher
customers. As a result, it is possible that new competitors may emerge and
rapidly acquire significant market share. Increased competition is likely to
result in price reductions, reduced gross margins and loss of market share. We
cannot assure you that we will be able to compete successfully or that
competitive pressures will not materially and adversely affect our business,
results of operations or financial condition.

      Companies doing business on the Internet, including ours, must also
compete with television, radio, cable and print (traditional advertising media)
for a share of advertisers' total advertising budgets. Advertisers may be
reluctant to devote a significant portion of their advertising budget to
Internet advertising if they perceive the Internet to be a limited or
ineffective advertising medium.

RISKS ASSOCIATED WITH POTENTIAL ACQUISITIONS OR INVESTMENTS

      We may acquire or make investments in complementary businesses, products,
services or technologies. From time to time we have had discussions with
companies regarding our acquiring, or investing in, their businesses, products,
services or technologies. We cannot assure you that we will be able to identify
suitable acquisition or investment candidates. Even if we do identify suitable
candidates, we cannot assure you that we will be able to make such acquisitions
or investments on commercially acceptable terms. If we buy a company, we could
have difficulty in assimilating that company's personnel and operations. In
addition, the key personnel of the acquired company may decide not to work for
us. If we make other types of acquisitions, we could have difficulty in
assimilating the acquired products, services or technologies into our
operations. These difficulties could disrupt our ongoing business, distract our
management and employees, increase our expenses and adversely affect our results
of operations due to accounting requirements such as goodwill. Furthermore, we
may incur debt or issue equity securities to pay for any future acquisitions.
The issuance of equity securities could be dilutive to our existing
stockholders.

DEPENDENCE ON KEY PERSONNEL

      Our future success depends to a significant extent on the continued
service of our key technical, sales and senior management personnel, in
particular, Kevin J. O'Connor, our Chief Executive Officer and Chairman of the
Board of Directors, Kevin P. Ryan, our President and Chief Operating Officer,
and Dwight A. Merriman, our Chief Technical Officer. We have no employment
agreements with any of these executives. The loss of the services of Messrs.
O'Connor, Ryan or Merriman, or certain other key employees, would likely have a
material adverse effect on our business, results of operations and financial
condition. Our future success also depends on our continuing to attract, retain
and motivate highly skilled employees. Competition for employees in our industry
is intense. We may be unable to retain our key employees or attract, assimilate
or retain other highly qualified employees in the future. We have from time to
time in the past experienced, and we expect to continue to experience in the
future, difficulty in hiring and retaining highly skilled employees with
appropriate qualifications.

DEPENDENCE ON THE WEB INFRASTRUCTURE

      Our success will depend, in large part, upon the maintenance of the Web
infrastructure, such as a reliable network backbone with the necessary speed,
data capacity and security, and timely development of enabling products such as
high speed modems, for providing reliable Web access and services and improved
content. We cannot assure you that the Web infrastructure will continue to
effectively support the demands placed on it as the Web continues to experience
increased numbers of users, frequency of use or increased bandwidth requirements
of users. Even if the necessary infrastructure or technologies are developed, we
may have to spend considerable amounts to adapt our solutions accordingly.
Furthermore, the Web has experienced a variety of outages and other delays due
to damage to portions of its infrastructure. Such outages and delays could
impact the Web sites of Web publishers using our solutions and the level of user
traffic on Web sites on the DoubleClick Network.


                                       28
<PAGE>

DEPENDENCE ON PROPRIETARY RIGHTS AND RISK OF INFRINGEMENT

      Our success and ability to compete are substantially dependent on our
internally developed technologies and trademarks, which we protect through a
combination of patent, copyright, trade secret and trademark law. We have filed
three patent applications in the United States and one patent application
internationally. In addition, we apply to register our trademarks in the United
States and internationally. (We own the registration for the DoubleClick
trademark in the United States.) We cannot assure you that any of our patent
applications or trademark applications will be approved. Even if they are
approved, such patents or trademarks may be successfully challenged by others or
invalidated. If our trademark registrations are not approved because third
parties own such trademarks, our use of such trademarks will be restricted
unless we enter into arrangements with such third parties which may be
unavailable on commercially reasonable terms.

      We generally enter into confidentiality or license agreements with our
employees, consultants and corporate partners, and generally control access to
and distribution of our technologies, documentation and other proprietary
information. Despite our efforts to protect our proprietary rights from
unauthorized use or disclosure, parties may attempt to disclose, obtain or use
our solutions or technologies. We cannot assure you that the steps we have taken
will prevent misappropriation of our solutions or technologies, particularly in
foreign countries where laws or law enforcement practices may not protect our
proprietary rights as fully as in the United States.

      Our DART technology collects and utilizes data derived from user activity
on the DoubleClick Network and the Web sites of Web publishers using our
solutions. This data is used for ad targeting and predicting ad performance.
Although we believe that we have the right to use such data and the compilation
of such data in our database, we cannot assure you that any trade secret,
copyright or other protection will be available for such information. In
addition, others may claim rights to such information. Further, pursuant to our
contracts with Web publishers using our solutions, we are obligated to keep
certain information regarding each Web publisher confidential.

      We have licensed, and we may license in the future, elements of our
trademarks, trade dress and similar proprietary rights to third parties. While
we attempt to ensure that the quality of our brand is maintained by these
business partners, such partners may take actions that could materially and
adversely affect the value of our proprietary rights or our reputation.

      We cannot assure you that any of our proprietary rights will be viable or
of value in the future since the validity, enforceability and scope of
protection of certain proprietary rights in Internet-related industries is
uncertain and still evolving. Furthermore, third parties may assert infringement
claims against us. From time to time we have been, and we expect to continue to
be, subject to claims in the ordinary course of our business, including claims
of alleged infringement of the trademarks and other intellectual property rights
of third parties by us or the Web publishers with Web sites in the DoubleClick
Network. Such claims and any resultant litigation, should it occur, could
subject us to significant liability for damages and could result in the
invalidation of our proprietary rights. In addition, even if we prevail, such
litigation could be time-consuming and expensive to defend, and could result in
the diversion of our time and attention, any of which could materially and
adversely affect our business, results of operations and financial condition.
Any claims or litigation from third parties may also result in limitations on
our ability to use the trademarks and other intellectual property subject to
such claims or litigation unless we enter into arrangements with the third
parties responsible for such claims or litigation which may be unavailable on
commercially reasonable terms.

RISKS ASSOCIATED WITH TECHNOLOGICAL CHANGE

      The Internet and Internet advertising markets are characterized by rapidly
changing technologies, evolving industry standards, frequent new product and
service introductions, and changing customer demands. Our future success will
depend on our ability to adapt to rapidly changing technologies and to enhance
existing solutions and develop and introduce a variety of new solutions to
address our customers' changing demands. We may experience difficulties that
could delay or prevent the successful design, development, introduction or
marketing of our solutions. In addition, our new solutions or enhancements must
meet the requirements of our current and prospective customers and must achieve
significant market acceptance. Material delays in introducing new solutions and
enhancements may cause customers to forego purchases of our solutions and
purchase those of our competitors.

RISKS ASSOCIATED WITH INTERNATIONAL EXPANSION


                                       29
<PAGE>

      We have operations in a number of international markets. We intend to
continue to expand our international operations and international sales and
marketing efforts. To date, we have limited experience in developing localized
versions of our solutions and in marketing, selling and distributing our
solutions internationally. We have established DoubleClick Networks in
Australia, Canada, France, Germany, Benelux (Belgium, Netherlands, and
Luxembourg) and the United Kingdom. In Japan, Iberoamerica (Spain, Portugal and
Latin America), Italy and Scandinavia (Sweden, Norway, Finland, and Denmark), we
are relying on our business partners to conduct operations, establish local
networks, aggregate Web publishers and coordinate sales and marketing efforts.
Our success in such markets is directly dependent on the success of our business
partners and their dedication of sufficient resources to our relationship.

      International operations are subject to other inherent risks, including:

      -     the impact of recessions in economies outside the United States;

      -     changes in regulatory requirements;

      -     reduced protection for intellectual property rights in some
            countries;

      -     potentially adverse tax consequences;

      -     difficulties and costs of staffing and managing foreign operations;

      -     political and economic instability;

      -     fluctuations in currency exchange rates; and

      -     seasonal fluctuations in Internet usage.

      These risks may materially and adversely affect our business, results of
operations or financial condition.

GOVERNMENT REGULATION AND LEGAL UNCERTAINTIES

      Laws and regulations directly applicable to Internet communications,
commerce and advertising are becoming more prevalent. The most recent session of
the United States Congress resulted in Internet laws regarding children's
privacy, copyrights and taxation. Such legislation could dampen the growth in
use of the Web generally and decrease the acceptance of the Web as a
communications, commercial and advertising medium. The governments of other
states or foreign countries might attempt to regulate our transmissions or levy
sales or other taxes relating to our activities. The European Union recently
enacted its own privacy regulations that may result in limits on the collection
and use of certain user information. The laws governing the Internet, however,
remain largely unsettled, even in areas where there has been some legislative
action. It may take years to determine whether and how existing laws such as
those governing intellectual property, privacy, libel and taxation apply to the
Internet and Internet advertising. In addition, the growth and development of
the market for Internet commerce may prompt calls for more stringent consumer
protection laws, both in the United States and abroad, that may impose
additional burdens on companies conducting business over the Internet. Our
business, results of operations and financial condition could be adversely
affected by the adoption or modification of laws or regulations relating to the
Internet.

SUBSTANTIAL INFLUENCE BY OFFICERS AND DIRECTORS

      The executive officers, directors and entities affiliated with them
beneficially own approximately a significant percentage of our outstanding
common stock. These stockholders may be able to exercise substantial influence
over all matters requiring approval by our stockholders, including the election
of directors and approval of significant corporate transactions. This
concentration of ownership may also have the effect of delaying or preventing a
change in control of DoubleClick.

POSSIBLE VOLATILITY OF STOCK PRICE


                                       30
<PAGE>

      The market price of our common stock has fluctuated in the past and is
likely to continue to be highly volatile and could be subject to wide
fluctuations. In addition, the stock market has experienced extreme price and
volume fluctuations. The market prices of the securities of Internet-related
companies have been especially volatile. Investors may be unable to resell their
shares of our common stock at or above the offering price. In the past,
companies that have experienced volatility in the market price of their stock
have been the object of securities class action litigation. If we were the
object of securities class action litigation, it could result in substantial
costs and a diversion of management's attention and resources.


                                       31
<PAGE>

                           PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

            NONE

ITEM 2. CHANGES IN SECURITIES AND USE OF PROCEEDS

      (a)   Changes in Securities:

            NONE

      (b)   Use of Proceeds

      On February 19, 1998, the Securities and Exchange Commission declared
      effective the Company's Registration Statement on Form S-1 (File No.
      333-42323). Pursuant to this Registration Statement, and the Abbreviated
      Registration Statement filed on February 19, 1998 pursuant to Rule 462(b)
      promulgated under the Securities Act of 1933, as amended, on February 25,
      1998, DoubleClick completed the initial public offering of 4,025,000
      shares of its Common Stock at an initial public offering price of $17.00
      per share (the "Offering"). The Offering was managed by Goldman, Sachs &
      Co., BT Alex.Brown and Cowen & Company. Proceeds to DoubleClick, after
      calculation of the underwriters discount and commission, from the Offering
      totaled approximately $62.5 million net of offering costs of $1.1 million.
      None of the expenses incurred in the offering were direct or indirect
      payments to directors, officers, general partners of the issuer or their
      associates, to persons owning ten percent or more of any class of equity
      securities of the issuer or to affiliates of the issuer. During the nine
      months ended September 30, 1998, DoubleClick used $26.8 million of the
      proceeds from the Offering toward general corporate purposes, including
      working capital, and toward the expansion of DoubleClick's international
      operations and sales and marketing capabilities. None of these expenses
      were direct or indirect payments to directors, officers, general partners
      of the issuer or their associates, to persons owning ten percent or more
      of any class of equity securities of the issuer or to affiliates of the
      issuer.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

      NONE

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

      NONE

ITEM 5. OTHER INFORMATION

      NONE

ITEM 6. EXHIBITS AND REPORT ON FORM 8-K

(a)   The following Exhibits are filed as part of this report:


                                       32
<PAGE>

      6.1   Indenture, dated as of March 22, 1999, between DoubleClick Inc. and
            The Bank of New York, as trustee.

      6.2   Registration Agreement, dated as of March 22, 1999, between
            DoubleClick Inc. and the Initial Purchasers as named on Schedule I
            to the Purchase Agreement.

      27.1  Financial Data Schedule

(b)   Reports on Form 8-K

      DoubleClick filed three reports on the form 8-K during the three months
ended on March 31, 1999. One Form 8-K was filed on February 3, 1999 announcing
the Alta Vista Advertising Services Agreement. One form 8-K was filed on March
15,1999 announcing a two-for-one stock split and the issuance of the 4 3/4%
Convertible Subordinated Notes. One Form 8-K was filed on March 15, 1999 for
purposes of filing the Alta Vista Advertising Services Agreement.


                                       33
<PAGE>

ITEM 7. SIGNATURES

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

                           DOUBLECLICK INC.


Date: October 15, 1999     By: /s/ STEPHEN COLLINS

                           Stephen Collins
                           CHIEF FINANCIAL OFFICER (PRINCIPAL FINANCIAL OFFICER)


                                       34



                                DoubleClick Inc.

                                       to

                              The Bank of New York,
                                   as Trustee

                                   -----------

                                    Indenture

                           Dated as of March 22, 1999

                  4.75% Convertible Subordinated Notes due 2006

<PAGE>

                                TABLE OF CONTENTS

                                                                            Page

                                    ARTICLE I

                  DEFINITIONS AND INCORPORATION BY REFERENCE 1

Section 1.01. Definitions ............................................         1
Section 1.02. Other Definitions ......................................         7
Section 1.03. Incorporation by Reference of Trust Indenture Act ......         8
Section 1.04. Rules of Construction ..................................         8

                                   ARTICLE II

                                 THE SECURITIES

Section 2.01. Form and Dating ........................................         9
Section 2.02. Execution, Authentication and Delivery .................        10
Section 2.03. Registrar, Paying Agent and Conversion Agent ...........        11
Section 2.04. Paying Agent to Hold Money in Trust ....................        11
Section 2.05. Noteholder Lists .......................................        11
Section 2.06. Transfer and Exchange ..................................        12
Section 2.07. Replacement Securities .................................        15
Section 2.08. Outstanding Securities .................................        16
Section 2.09. Treasury Securities ....................................        16
Section 2.10. Temporary Securities; Exchange of Global
                Security for Definitive Securities ...................        16
Section 2.11. Cancellation ...........................................        17
Section 2.12. Payment of Interest: Interest Rights Preserved .........        17
Section 2.13. Computation of Interest ................................        18
Section 2.14. CUSIP Number ...........................................        19
Section 2.15. Regulation S ...........................................        19
Section 2.16. Persons Deemed Owners ..................................        19

                                   ARTICLE III
                                   REDEMPTION

Section 3.01. Notices to Trustee .....................................        19
Section 3.02. Selection of Securities to be Redeemed .................        19
Section 3.03. Notice of Redemption ...................................        20
Section 3.04. Effect of Notice of Redemption .........................        21
Section 3.05. Deposit of Redemption Price ............................        21
Section 3.06. Securities Redeemed in Part ............................        22
Section 3.07. Optional Redemption ....................................        22
Section 3.08. Designated Event Offer .................................        22
Section 3.09. Mandatory Redemption ...................................        24

                                   ARTICLE IV

                                    COVENANTS

Section 4.01. Payment of Securities ..................................        24
Section 4.02. SEC Reports ............................................        25
Section 4.03. Compliance Certificate .................................        25
Section 4.04. Stay,  Extension and Usury Law .........................        26
Section 4.05. Corporate Existence ....................................        26
Section 4.06. Taxes ..................................................        26
Section 4.07. Designated Event .......................................        27
Section 4.08. Investment Company Act .................................        27

                                    ARTICLE V

                                   CONVERSION

Section 5.01. Conversion Privilege ...................................        27
Section 5.02. Conversion Procedure ...................................        28
Section 5.03. Fractional Shares ......................................        29
Section 5.04. Taxes on Conversion ....................................        29
Section 5.05. Company to Provide Stock ...............................        29
Section 5.06. Adjustment of Conversion Price .........................        29
Section 5.07. No Adjustment ..........................................        33

<PAGE>

Section 5.08. Other Adjustments ......................................        33
Section 5.09. Adjustments for Tax Purposes ...........................        34
Section 5.10. Adjustments by the Company .............................        34
Section 5.11. Notice of Adjustment ...................................        34
Section 5.12. Notice of Certain Transactions .........................        34
Section 5.13. Effect of Reclassifications, Consolidations, Mergers,
                Continuances or Sales on Conversion Privilege ........        34
Section 5.14. Trustee's  Disclaimer ..................................        35
Section 5.15. Cancellation of Converted Securities ...................        36
Section 5.16. Restriction on Common Stock Issuable Upon Conversion ...        36

                                   ARTICLE VI

                                  SUBORDINATION

Section 6.01. Agreement to Subordinate ...............................        37
Section 6.02. No Payment on Securities if Senior Debt in Default .....        37
Section 6.03. Distribution on Acceleration of Securities; Dissolution
                and Reorganization; Subrogation of Securities.........        38
Section 6.04. Reliance by Senior Debt on Subordination  Provisions ...        41
Section 6.05. No Waiver of Subordination Provisions ..................        41
Section 6.06. Trustee's Relation to Senior Debt ......................        41
Section 6.07. Other Provisions Subject Hereto ........................        42

                                   ARTICLE VII

                                   SUCCESSORS

Section 7.01. Merger, Consolidation or Sale of Assets ................        42
Section 7.02. Successor Corporation Substituted ......................        43

                                  ARTICLE VIII

                              DEFAULTS AND REMEDIES

Section 8.01. Events of Default ......................................        44
Section 8.02. Acceleration ...........................................        45
Section 8.03. Other Remedies .........................................        46
Section 8.04. Waiver of Past Defaults ................................        46
Section 8.05. Control by Majority ....................................        46
Section 8.06. Limitation on Suits ....................................        46
Section 8.07. Rights of Noteholders to ReceivePayment ................        47
Section 8.08. Collection Suit by Trustee .............................        47
Section 8.09. Trustee May File Proofs of Claim .......................        47
Section 8.10. Priorities .............................................        48
Section 8.11. Undertaking for Costs ..................................        49
Section 8.12. Restoration of Rights and Remedies .....................        49
Section 8.13. Rights and Remedies Cumulative .........................        49
Section 8.14. Delay or Omission Not Waiver ...........................        49

                                   ARTICLE IX

                                     TRUSTEE

Section 9.01. Duties of Trustee ......................................        50
Section 9.02. Rights of Trustee ......................................        50
Section 9.03. Individual Rights of Trustee ...........................        52
Section 9.04. Trustee's Disclaimer ...................................        52
Section 9.05. Notice of Defaults .....................................        52
Section 9.06. Reports by Trustee to Noteholders ......................        52
Section 9.07. Compensation and Indemnity .............................        52
Section 9.08. Replacement of Trustee .................................        53
Section 9.09. Successor Trustee by Merger, Etc .......................        54
Section 9.10. Eligibility; Disqualification ..........................        54
Section 9.11. Preferential Collection of Claims Against Company ......        54

                                    ARTICLE X

                             DISCHARGE OF INDENTURE

Section 10.01. Termination of the Company's Obligations ..............        55
Section 10.02. Repayment to Company ..................................        56
Section 10.03. Reinstatement .........................................        56

<PAGE>

                                   ARTICLE XI

                       AMENDMENTS, SUPPLEMENTS AND WAIVERS

Section 11.01. Without Consent of Noteholders ........................        57
Section 11.02. With Consent of Noteholders ...........................        57
Section 11.03. Compliance with Trust Indenture Act ...................        59
Section 11.04. Revocation and Effect of Consents .....................        59
Section 11.05. Notation on or Exchange of Securities .................        59
Section 11.06. Trustee Protected .....................................        60
Section 11.07. Trustee to Sign Supplemental Indentures ...............        60
Section 11.08. Payment for Consent ...................................        61

                                   ARTICLE XII

                                  MISCELLANEOUS

Section 12.01. Trust Indenture Act Controls ..........................        61
Section 12.02. Notices ...............................................        61
Section 12.03. Communication by Noteholders with Other Noteholders ...        61
Section 12.04. Certificate and Opinion as to Conditions Precedent ....        62
Section 12.05. Statements Required in Certificate or Opinion .........        62
Section 12.06. Rules by Trustee and Agents ...........................        63
Section 12.07. Legal Holidays ........................................        63
Section 12.08. No Recourse Against Others ............................        63
Section 12.09. Counterparts ..........................................        63
Section 12.10. Variable Provisions ...................................        63
Section 12.11. GOVERNING LAW .........................................        64
Section 12.12. No Adverse Interpretation ofOther Agreements ..........        64
Section 12.13. Successors ............................................        64
Section 12.14. Severability ..........................................        64
Section 12.15. Table of Contents, Headings,Etc .......................        65

EXHIBIT A FORM OF CONVERTIBLE SUBORDINATED NOTE.......................       A-1
EXHIBIT B FORM OF TRANSFER CERTIFICATE................................       B-1
EXHIBIT C FORM OF ACCREDITED INVESTOR TRANSFEREE CERTIFICATE..........       C-1
EXHIBIT D FORM OF RESTRICTEDCOMMON STOCK LEGEND.......................       D-1
EXHIBIT E FORM OF TRANSFER CERTIFICATE FORTRANSFER OF RESTRICTED
            COMMON STOCK..............................................       E-1

      INDENTURE dated as of March 22, 1999 between DoubleClick Inc., a Delaware
corporation (the "Company"), and The Bank of New York, a New York banking
corporation, as trustee (the "Trustee").

      Each party agrees as follows for the benefit of the other party and for
the equal and ratable benefit of the holders of the Company's 4.75% Convertible
Subordinated Notes due 2006 (the "Securities"):

                                    ARTICLE I

                   DEFINITIONS AND INCORPORATION BY REFERENCE

      Section 1.01. Definitions

      "Affiliate" of any specified person means any other person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified person. For the purposes of this definition,
"control" (including, with correlative meanings, the terms "controlling",
"controlled by" and "under common control with"), as used with respect to any
Person, shall mean the possession, directly or indirectly, of the power to
direct or cause the direction of the management or policies of such person,
whether through the ownership of voting securities or by agreement or otherwise.

      "Agent" means any Registrar, Paying Agent or Conversion Agent.

      "Board of Directors" means the board of directors of the Company or any
authorized committee of such board of directors.

      "Board Resolution" means a copy of a resolution of the Board of Directors
certified by the Secretary or an Assistant Secretary of the Company to have been
duly adopted by the Board of Directors and to be in full force and effect on the
date of such certification and delivery to the Trustee.

<PAGE>

      "Business Day" means any day that is not a Legal Holiday.

      "Capital Stock" means any and all shares, interests, participations,
rights or other equivalents (however designated) of equity interests in any
entity, including, without limitation, corporate stock and partnership
interests.

      "Change of Control" will be deemed to have occurred when: (i) any "person"
or "group" (as such terms are used in Sections 13(d) and 14(d) of the Exchange
Act) is or becomes the "beneficial owner" (as defined in Rules 13d-3 and 13d-5
under the Exchange Act) of shares representing more than 50% of the combined
voting power of the then outstanding securities entitled to vote generally in
elections of directors of the Company ("Voting Stock"), (ii) the Company or any
subsidiary of the Company consolidates with or merges into any other person, or
any other person merges into the Company or any subsidiary of the Company,
unless the stockholders of the Company immediately before such transaction own,
directly or indirectly immediately following such transaction, at least a
majority of the combined voting power of the then outstanding voting securities
entitled to vote generally in elections of directors of the Company or the
corporation resulting from such transaction in substantially the same respective
proportions as their ownership of the Voting Stock immediately before such
transaction, (iii) the Company or the Company and its Subsidiaries, taken as a
whole, sells, assigns, conveys, transfers or leases all or substantially all
assets of the Company or of the Company and its Subsidiaries, taken as a whole,
as applicable, (other than to one or more wholly-owned Subsidiaries of the
Company) or (iv) any time the Continuing Directors do not constitute a majority
of the board of directors of the Company (or, if applicable, a successor
corporation to the Company); provided, however, that (a) a Change of Control
under clause (i), (ii) or (iii) above shall not be deemed to have occurred if
the Daily Market Price per share of Common Stock for any five Trading Days
within the period of 10 consecutive Trading Days ending immediately after the
later of the Change of Control or the public announcement of the Change of
Control (in the case of a Change of Control under clause (i) above) or the
period of 10 consecutive Trading Days ending immediately before the Change of
Control (in the case of a Change of Control under clause (ii) or (iii) above)
shall equal or exceed 105% of the Conversion Price of the Securities in effect
on the date of such Change of Control or the public announcement of such Change
of Control, as applicable, or (b) a Change of Control under clause (i), (ii) or
(iii) above shall not be deemed to have occurred if at least 90% of the
consideration in the Change of Control transaction consists of shares of capital
stock traded on a U.S. national securities exchange or quoted on the NNM, and as
a result of such transaction, the Securities become convertible solely into such
capital stock.

      "Closing Date" means March 22, 1999.

      "Common Stock" means the common stock of the Company as the same exists at
the date of this Indenture or as such stock may be constituted from time to
time.

      "Company" means the party named as such above until a successor replaces
it in accordance with Article VII and thereafter means the successor.

      "Continuing Directors" means, as of any date of determination, any member
of the board of directors of the Company who (i) was a member of such board of
directors on the date of this Indenture or (ii) was nominated for election or
elected to such board of directors with the approval of a majority of the
Continuing Directors who were members of such board of directors at the time of
such nomination or election.

      "Corporate Trust Office" means the office of the Trustee at which at any
particular time its corporate trust business shall be principally administered,
which office at the date of execution of this Indenture is located at 101
Barclay Street, Floor 21 West, New York, New York 10286, Attention: Corporate
Trust Trustee Administration.

      "Daily Market Price" means the price of a share of Common Stock on the
relevant date, determined (a) on the basis of the last reported sale price
regular way of the Common Stock as reported on the Nasdaq Stock Market's
National Market (the "NNM"), or if the Common Stock is not then listed on the
NNM, as reported on the principle national securities exchange upon which the
Common Stock is listed, or (b) if there is no such reported sale on the day in
question, on the basis of the average of the closing bid and asked quotations
regular way as so reported, or (c) if the Common Stock is not listed on the NNM
or on any national securities exchange, on the basis of the average of the high
bid and low asked quotations regular way on the day in question in the
over-the-counter market as reported by the National Association of Securities
Dealers Automated Quotation System, or if not so quoted, as reported by National
Quotation Bureau, Incorporated, or a similar organization.

<PAGE>

      "Damages Payment Date" has the meaning set forth in the Registration
Agreement.

      "Default" means any event that is or, with the passage of time or the
giving of notice or both, would be an Event of Default.

      "Depositary" means The Depository Trust Company, its nominees and their
respective successors.

      "Designated Event" means the occurrence of a Change of Control or a
Termination of Trading.

      "Designated Senior Debt" means any Senior Debt which, at the date of
determination, has an aggregate principal amount outstanding of, or commitments
to lend up to, at least $15,000,000 and is specifically designated by the
Company in the instrument evidencing or governing such Senior Debt as
"Designated Senior Debt" for purposes of this Indenture.

      "Exchange Act" means the Securities Exchange Act of 1934, as amended.

      "GAAP" means generally accepted accounting principles set forth in the
opinions and pronouncements of the Accounting Principles Board of the American
Institute of Certified Public Accountants and statements and pronouncements of
the Financial Accounting Standards Board or in such other statements by such
other entity as approved by a significant segment of the accounting profession
of the United States, which are in effect from time to time.

      "Global Securities Legend" means the legend labeled as such and that is
set forth in Exhibit A hereto.

      "Guarantee" means a guarantee (other than by endorsement of negotiable
instruments for collection in the ordinary course of business), direct or
indirect, in any manner (including, without limitation, letters of credit and
reimbursement agreements in respect thereof), of all or any part of any
Indebtedness; and such term, when used as a verb, shall have correlative
meaning.

      "Indebtedness" means, with respect to any Person, all Obligations, whether
or not contingent, of such Person (i)(a) for borrowed money (including, but not
limited to, any indebtedness secured by a security interest, mortgage or other
lien on the assets of such Person which is (1) given to secure all or part of
the purchase price of property subject thereto, whether given to the vendor of
such property or to another, or (2) existing on property at the time of
acquisition thereof), (b) evidenced by a note, debenture, bond or other written
instrument, (c) under a lease required to be capitalized on the balance sheet of
the lessee under GAAP or under any lease or related document (including a
purchase agreement) which provides that such Person is contractually obligated
to purchase or to cause a third party to purchase such leased property, (d) in
respect of letters of credit, bank guarantees or bankers' acceptances (including
reimbursement obligations with respect to any of the foregoing), (e) with
respect to Indebtedness secured by a mortgage, pledge, lien, encumbrance, charge
or adverse claim affecting title or resulting in an encumbrance to which the
property or assets of such Person are subject, whether or not the Obligation
secured thereby shall have been assumed or Guaranteed by or shall otherwise be
such Person's legal liability, (f) in respect of the balance of the deferred and
unpaid purchase price of any property or assets, and (g) under interest rate or
currency swap agreements, cap, floor and collar agreements, spot and forward
contracts and similar agreements and arrangements; (ii) with respect to any
Obligation of others of the type described in the preceding clause (i) or under
clause (iii) below assumed by or Guaranteed in any manner by such Person or in
effect Guaranteed by such Person through an agreement to purchase (including,
without limitation, "take or pay" and similar arrangements), contingent or
otherwise (and the Obligations of such Person under any such assumptions,
Guarantees or other such arrangements); and (iii) any and all deferrals,
renewals, extensions, refinancings and refundings of, or amendments,
modifications or supplements to, any of the foregoing.

      "Indenture" means this Indenture, as amended or supplemented from time to
time by one or more indentures supplemental hereto entered into pursuant to the
applicable provisions hereof, including for all purposes of this Indenture any
supplemental indenture and the provisions of the TIA that are deemed to be a
part of and govern this Indenture and any supplemental indenture.

      "Initial Purchasers" means Salomon Smith Barney Inc., BT Alex. Brown
Incorporated and Donaldson, Lufkin & Jenrette Securities Corporation.

      "interest payment date" means, when used with respect to the Securities,
each March 15 and September 15.

<PAGE>

      "Issuance Date" means March 22, 1999.

      "Junior Securities" means securities of the Company as reorganized or
readjusted or any other corporation provided for by a plan of reorganization or
readjustment the payment of which is subordinate, at least to the extent
provided for in this Indenture with respect to the Securities, to the payment in
full without diminution or modification by such plan of all Senior Debt.

      "Liquidated Damages" has the meaning specified in paragraph 11 of the form
of Security which is attached as Exhibit A hereto.

      "Material Subsidiary" means any Subsidiary of the Company which at the
date of determination is a "significant subsidiary" as defined in Rule 1-02(w)
of Regulation S-X under the Securities Act and the Exchange Act (as such
Regulation is in effect on March 22, 1999).

      "maturity date" and "final maturity date" mean, when used with respect to
the Securities, March 15, 2006.

      "NNM" has the meaning specified in the definition of "Daily Market Price".

      "Noteholder" or "holder" means a person in whose name a Security is
registered.

      "Obligations" means any principal, interest, penalties, fees,
indemnifications, reimbursements, damages and other liabilities payable under
the documentation governing any Indebtedness.

      "Offering Memorandum" means the offering memorandum relating to the
Securities dated March 17, 1999.

      "Officers' Certificate" means a certificate signed by two Officers, one of
whom must be the Chairman of the Board, the Chief Executive Officer, the
President or the Chief Financial Officer of the Company, and delivered to the
Trustee that meets the requirements of this Indenture.

      "Opinion of Counsel" means a written opinion from legal counsel who is
acceptable to the Trustee that meets the requirements of Sections 12.04 and
12.05 hereof. The counsel may be an employee of or counsel to the Company or the
Trustee unless otherwise expressly stated herein.

      "Person" and "person" means any individual, corporation, partnership,
joint venture, association, joint stock company, trust, unincorporated
organization, limited liability company or government or any agency or political
subdivision thereof.

      "Registration Agreement" means the Registration Agreement relating to the
Securities and Common Stock issuable upon conversion of such Securities dated
March 22, 1999, between the Company and the Initial Purchasers, as such
agreement may be amended, modified or supplemented from time to time.

      "Representative" means the trustee, agent or representative (if any) for
an issue of Senior Debt.

      "Restricted Common Stock Legend" means the legend labeled as such and that
is set forth in Exhibit D hereto.

      "Restricted Definitive Securities Legend" means the legend labeled as such
and that is set forth in Exhibit A hereto.

      "Restricted Global Securities Legend" means the legend labeled as such and
that is set forth in Exhibit A hereto.

      "Restricted Securities Legend" means the Restricted Definitive Securities
Legend or the Restricted Global Securities Legend or both, as the context may
require.

      "SEC" means the Securities and Exchange Commission.

      "Securities" means the Securities described in the preamble above that are
issued, authenticated and delivered under this Indenture.

<PAGE>

      "Securities Act" means the Securities Act of 1933, as amended.

      "Senior Debt" means the principal of, premium, if any, on, interest on and
other amounts due on Indebtedness of the Company, whether outstanding on the
date of this Indenture or thereafter created, incurred, assumed or Guaranteed by
the Company (including all deferrals, renewals, extensions, refinancings and
refundings of, or amendments, modifications or supplements to, any of the
foregoing), unless, in the instrument creating or evidencing such Indebtedness
or pursuant to which such Indebtedness is outstanding, it is expressly provided
that such Indebtedness is not senior in right of payment to, or ranks pari passu
in right of payment with, the Securities. Senior Debt includes, with respect to
the obligations described above, interest accruing, pursuant to the terms of
such Senior Debt, on or after the filing of any petition in bankruptcy or for
reorganization relating to the Company, whether or not post-filing interest is
allowed in such proceeding, at the rate specified in the instrument governing
the relevant obligation. Notwithstanding anything to the contrary in the
foregoing, Senior Debt shall not include: (a) Indebtedness of or amounts owed by
the Company for compensation to employees, or for goods, services or materials
purchased in the ordinary course of business; (b) Indebtedness of the Company to
a Subsidiary of the Company other than such Indebtedness that would be subject
to a prior claim by the lenders under the Company's existing credit facilities;
or (c) any liability for federal, state, local or other taxes owed or owing by
the Company.

      "Shelf Registration Statement" shall have the meaning set forth in the
Registration Agreement.

      "Stock Split" means the two-for-one Common Stock split in the form of a
stock dividend to be distributed by the Company to its stockholders on or about
April 2, 1999.

      "Subsidiary" of a Person means any corporation, association or other
business entity of which more than 50% of the total voting power of shares of
Capital Stock entitled (without regard to the occurrence of any contingency) to
vote in the election of directors, managers or trustees thereof is at the time
owned or controlled, directly or indirectly, by that Person or one or more of
the other Subsidiaries of that Person or a combination thereof.

      "Termination of Trading" will be deemed to have occurred if the Common
Stock (or other securities into which the Securities are then convertible) is
neither listed for trading on a United States national securities exchange nor
approved for trading on the NNM or other established automated over-the-counter
trading market in the United States.

      "TIA" means the Trust Indenture Act of 1939 (15 U.S. Code SS 77aaa-77bbbb)
and the rules and regulations thereunder as in effect on the date on which this
Indenture is qualified under the Trust Indenture Act of 1939 except as required
by Section 11.03 hereof, provided that if the Trust Indenture Act of 1939 or the
rules and regulations thereunder are amended after such date, "TIA" means, if so
required by such amendment, the Trust Indenture Act of 1939, as so amended.

      "Trading Day" shall mean (A) if the applicable security is listed or
admitted for trading on the New York Stock Exchange or another national
securities exchange, a day on which the New York Stock Exchange or such other
national securities exchange is open for business, (B) if the applicable
security is quoted on the NNM, a day on which trades may be made thereon or (C)
if the applicable security is not so listed, admitted for trading or quoted, any
day other than a Legal Holiday.

      "Trustee" means the party named as such above until a successor replaces
it in accordance with the applicable provisions of this Indenture and thereafter
means the successor.

      "Trust Officer" means any officer within the corporate trust department of
the Trustee, including any vice president, assistant vice president, assistant
secretary, assistant treasurer, trust officer or any other officer of the
Trustee who customarily performs functions similar to those performed by the
persons who at the time shall be such officers, respectively, and who shall have
direct responsibility for the administration of this Indenture or to whom any
corporate trust matter is referred because of such person's knowledge of and
familiarity with the particular subject.

      Section 1.02. Other Definitions

Term                                         Defined in
                                              Section

<PAGE>

"Agent Members".......................................................  2.01
"Bankruptcy Law"......................................................  8.01
"Cedel Bank"..........................................................  2.01
"Commencement Date"...................................................  3.08
"Conversion Agent"....................................................  2.03
"Conversion Date".....................................................  5.02
"Conversion Price"....................................................  5.01
"Conversion Shares"...................................................  5.06
"Current Market Price"................................................  5.06
"Custodian"...........................................................  8.01
"Default Rate"........................................................  2.13
"Defaulted Interest...................................................  2.12
"Definitive Securities"...............................................  2.01
"Designated Event Offer"..............................................  4.07
"Designated Event Payment"............................................  4.07
"Designated Event Payment Date".......................................  3.08
"Distribution Date"...................................................  5.06
"Distribution Record Date"............................................  5.06
"Excess Payment"......................................................  5.06
"Euroclear"...........................................................  2.01
"Event of Default"....................................................  8.01
"Global Security".....................................................  2.01
"Legal Holiday"....................................................... 12.07
"Non-Global Purchasers"...............................................  2.01
"Officer"............................................................. 12.10
"Paying Agent"........................................................  2.03
"Payment Blockage Notice".............................................  6.02
"Payment Blockage Period".............................................  6.02
"Payment Default".....................................................  8.01
"Purchase Agreement"..................................................  2.01
"Purchase Date".......................................................  5.06
"QIBs"................................................................  2.01
"Registrar"...........................................................  2.03
"Regulation S"........................................................  2.01
"Rights"..............................................................  5.06
"Rule 144A"...........................................................  2.01
"Tender Period".......................................................  3.08

      Section 1.03. Incorporation by Reference of Trust Indenture Act . Whenever
this Indenture refers to a provision of the TIA, the provision is incorporated
by reference in and made a part of this Indenture.

      The following TIA terms used in this Indenture have the following
meanings:

      "indenture securities" means the Securities;

      "indenture security holder" means a Noteholder;

      "indenture to be qualified" means this Indenture;

      "indenture trustee" or "institutional trustee" means the Trustee; and

      "obligor" on the Securities means the Company or any other obligor on the
Securities.

      All other terms used in this Indenture that are defined by the TIA,
defined by TIA reference to another statute or defined by SEC rule under the TIA
have the meanings so assigned to them.

      . Unless the context otherwise requires:

            (a) a term has the meaning assigned to it;

            (b) an accounting term not otherwise defined has the meaning
      assigned to it in accordance with GAAP consistently applied;

            (c) "or" is not exclusive;

            (d) words in the singular include the plural, and words in the
      plural include the singular; and

            (e) provisions apply to successive events and transactions.

<PAGE>

                                   ARTICLE II

                                 THE SECURITIES

      . The Securities and the Trustee's certificate of authentication shall be
substantially in the form of Exhibit A which is hereby incorporated in and
expressly made a part of this Indenture.

      The Securities may have notations, legends or endorsements required by
law, stock exchange rule, agreements to which the Company is subject, if any, or
usage (provided that any such notation, legend or endorsement is in a form
acceptable to the Company). The Company shall furnish any such legend not
contained in Exhibit A to the Trustee in writing. Each Security shall be dated
the date of its authentication. The terms and provisions of the Securities set
forth in Exhibit A are part of the terms of this Indenture and to the extent
applicable, the Company and the Trustee, by their execution and delivery of this
Indenture, expressly agree to such terms and provisions and to be bound thereby.

      (a) Global Securities. The Securities are being offered and sold by the
Company pursuant to a Purchase Agreement relating to the Securities, dated March
17, 1999, among the Company and the Initial Purchasers (the "Purchase
Agreement").

      Securities offered and sold (i) in reliance on Regulation S under the
Securities Act ("Regulation S") or (ii) to "qualified institutional buyers" as
defined in Rule 144A ("QIBs") in reliance on Rule 144A under the Securities Act
("Rule 144A"), each as provided in the Purchase Agreement, shall be issued in
the form of one or more permanent global Securities in definitive, fully
registered form without interest coupons with the Global Securities Legend and
Restricted Global Securities Legend set forth in Exhibit A hereto (each, a
"Global Security"). Any Global Security shall be deposited on behalf of the
purchasers of the Securities represented thereby with the Trustee, at its New
York office, as custodian for the Depositary, and registered in the name of the
Depositary or a nominee of the Depositary for the accounts of participants in
the Depositary (and, in the case of Securities held in accordance with
Regulation S, registered with the Depositary for the accounts of designated
agents holding on behalf of the Euroclear System ("Euroclear") or, when its
procedures so permit, Cedel Bank, societe anonyme ("Cedel Bank")), duly executed
by the Company and authenticated by the Trustee as hereinafter provided. The
aggregate principal amount of a Global Security may from time to time be
increased or decreased by adjustments made on the records of the Trustee and the
Depositary or its nominee as hereinafter provided.

      (b) Book-Entry Provisions. This Section 2.01(b) shall apply only to a
Global Security deposited with or on behalf of the Depositary.

      The Company shall execute and the Trustee shall, in accordance with this
Section 2.01(b) and the written order of the Company, authenticate and deliver
initially one or more Global Securities that (i) shall be registered in the name
of Cede & Co. or other nominee of such Depositary and (ii) shall be delivered by
the Trustee to such Depositary or pursuant to such Depositary's instructions or
held by the Trustee as custodian for the Depositary pursuant to a FAST Balance
Certificate Agreement between the Depositary and the Trustee.

      Members of, or participants in, the Depositary ("Agent Members") shall
have no rights under this Indenture with respect to any Global Security held on
their behalf by the Depositary or by the Trustee as the custodian of the
Depositary or under such Global Security, and the Depositary may be treated by
the Company, the Trustee and any agent of the Company or the Trustee as the
absolute owner of such Global Security for all purposes whatsoever.
Notwithstanding the foregoing, nothing herein shall prevent the Company, the
Trustee or any agent of the Company or the Trustee from giving effect to any
written certification, proxy or other authorization furnished by the Depositary
or impair, as between the Depositary and its Agent Members, the operation of
customary practices of such Depositary governing the exercise of the rights of a
holder of a beneficial interest in any Global Security.

      The provisions of the "Operating Procedures of the Euroclear System" and
"Terms and Conditions Governing Use of Euroclear" and the "Management
Regulations and Instructions to Participants" of Cedel shall be applicable to
interests in any Global Securities that are held by participants through
Euroclear or Cedel. The Trustee shall have no obligation to notify holders of
any such procedures or to monitor or enforce compliance with the same.

      (c) Definitive Securities. Except as provided in Section 2.06 and 2.10,
owners of beneficial interests in Global Securities will not be entitled to
receive physical delivery of certificated Securities in definitive form.
Purchasers of

<PAGE>

Securities who are not QIBs and did not purchase Securities sold in reliance on
Regulation S under the Securities Act (referred to herein as the "Non-Global
Purchasers") will receive certificated Securities in definitive form bearing the
Restricted Definitive Securities Legend set forth in Exhibit A hereto
("Definitive Securities"). Definitive Securities will bear the Restricted
Definitive Securities Legend set forth on Exhibit A unless removed in accordance
with Section 2.06(b).

      . One Officer shall sign the Securities for the Company by manual or
facsimile signature. The Company's seal or a facsimile thereof shall be
reproduced on the Securities.

      If an Officer whose signature is on a Security no longer holds that office
at the time the Security is authenticated, the Security shall nevertheless be
valid.

      A Security shall not be entitled to any benefits under this Indenture or
the Registration Agreement or otherwise be valid until authenticated by the
manual signature of an authorized signatory of the Trustee. The signature shall
be conclusive evidence that the Security has been authenticated under this
Indenture.

      Upon a written order of the Company signed by two Officers, the Trustee
shall authenticate the Securities for original issue up to an aggregate
principal amount of $200,000,000 (plus up to an additional $50,000,000 aggregate
principal amount which may be issued from time to time upon exercise by the
Initial Purchasers of the over-allotment option set forth in the Purchase
Agreement) and deliver such authenticated Securities as directed in such order.
The aggregate principal amount of Securities outstanding at any time shall not
exceed such amount except as provided in Section 2.07.

      The Trustee may appoint one or more authenticating agents acceptable to
the Company to authenticate Securities. An authenticating agent may authenticate
Securities whenever the Trustee may do so. Each reference in this Indenture to
authentication by the Trustee includes authentication by such agent. An
authenticating agent has the same rights as an Agent to deal with the Company or
an Affiliate of the Company.

      . The Company shall maintain in the Borough of Manhattan, The City of New
York, State of New York (i) an office or agency where Securities may be
presented for registration of transfer or for exchange (the "Registrar"), (ii)
an office or agency where Securities may be presented for payment (the "Paying
Agent"), (iii) an office or agency where Securities may be presented for
conversion (the "Conversion Agent") and (iv) an office or agency where notices
to or demands upon the Company in respect of the Securities and this Indenture
may be sent. The Registrar shall keep a register of the Securities and of their
transfer and exchange. The Company has initially appointed the Trustee (at 101
Barclay Street, Floor 21 West, New York, New York 10286) as its Registrar,
Paying Agent and Conversion Agent in New York. The Company may appoint one or
more co-registrars, one or more additional paying agents and one or more
additional conversion agents in such other locations as it shall determine. The
term "Registrar" includes any co-registrar, the term "Paying Agent" includes any
additional paying agent and the term "Conversion Agent" includes any additional
conversion agent. The Company may change any Paying Agent, Registrar or
Conversion Agent without prior notice to any Noteholder. The Company shall
notify the Trustee of the name and address of any newly-appointed Agent not a
party to this Indenture. If the Company fails to appoint or maintain another
entity as Registrar, Paying Agent or Conversion Agent, the Trustee shall act as
such.

      . The Company shall require each Paying Agent other than the Trustee to
agree in writing that the Paying Agent will hold in trust for the benefit of
Noteholders or the Trustee all money held by the Paying Agent for the payment of
principal of, premium, if any, on, interest and Liquidated Damages, if any, on,
the Securities, and will notify the Trustee of any default by the Company in
making any such payment. While any such default continues, the Trustee may
require a Paying Agent to pay all money held by it to the Trustee. The Company
at any time may require a Paying Agent to pay all money held by it to the
Trustee and to account for any money disbursed by it. Upon payment over to the
Trustee, the Paying Agent (if other than the Company or an Affiliate of the
Company) shall have no further liability for the money. If the Company or an
Affiliate of the Company acts as Paying Agent, it shall segregate and hold in a
separate trust fund for the benefit of the Noteholders all money held by it as
Paying Agent.

      . The Trustee shall preserve in as current a form as is reasonably
practicable the most recent list available to it of the names and addresses of
Noteholders and shall otherwise comply with TIA S312(a). If the Trustee is not
the Registrar, the Company shall furnish to the Trustee at least seven Business
Days before each interest payment date and at such other times as the Trustee
may request in writing a list in such form and as of such date as the Trustee
may reasonably require of the names and addresses of Noteholders, and the
Company shall otherwise comply with TIA S312(a).

<PAGE>

      . Where Securities are presented to the Registrar with a request to
register a transfer or to exchange them for an equal principal amount of
Securities of other denominations, such Registrar shall register the transfer or
make the exchange if the requirements set forth in this Indenture and as
otherwise may be reasonably required by the Registrar with respect to such
transactions are met. To permit registrations of transfers and exchanges, the
Company shall issue and the Trustee shall authenticate Securities at the
Registrar's request. No service charge shall be made for any registration of
transfer or exchange (except as otherwise expressly permitted herein), but the
Company may require payment of a sum sufficient to cover any transfer tax or
similar governmental charge payable in connection therewith (other than any such
transfer tax or similar governmental charge payable upon exchanges pursuant to
Sections 2.10, 3.06, 3.08, 5.02 or 11.05 hereof not involving any transfer of
the Securities).

      The Company shall not be required (i) to issue, register the transfer of,
or exchange Securities during a period beginning at the opening of business 15
days before the day of mailing of notice of redemption of Securities under
Section 3.03 hereof and ending at the close of business on the day of such
mailing, or (ii) to exchange or register the transfer of any Security so
selected for redemption in whole or in part, except the unredeemed portion of
any Security being redeemed in part.

      (a) Notwithstanding any provision to the contrary herein, so long as a
Global Security remains outstanding and is held by or on behalf of the
Depositary, transfers of a Global Security, in whole or in part, or of any
beneficial interest therein, shall only be made in accordance with Sections
2.01(b) and 2.10 and this Section 2.06(a); provided, however, that beneficial
interests in a Global Security may be transferred to persons who take delivery
thereof in the form of a beneficial interest in the Global Security in
accordance with the transfer restrictions set forth under the heading "Notice to
Investors" in the Offering Memorandum and, if applicable, in the Restricted
Global Securities Legend.

                  (i) Except for transfers or exchanges made in accordance with
      any of clauses (ii) through (v) of this Section 2.06(a) and Section 2.10,
      transfers of a Global Security shall be limited to transfers of such
      Global Security in whole, but not in part, to nominees of the Depositary
      or to a successor of the Depositary or such successor's nominee.

                  (ii) Global Security to Definitive Security. If an owner of a
      beneficial interest in a Global Security deposited with the Depositary or
      with the Trustee as custodian for the Depositary wishes at any time to
      transfer its interest in such Global Security to a Person who is required
      to take delivery thereof in the form of a Definitive Security, such owner
      may, subject to the rules and procedures of Euroclear or Cedel Bank, if
      applicable, and the Depositary, cause the exchange of such interest for
      one or more Definitive Securities of any authorized denomination or
      denominations and of the same aggregate principal amount. Upon receipt by
      the Registrar of (1) instructions from Euroclear or Cedel Bank, if
      applicable, and the Depositary directing the Trustee to authenticate and
      deliver one or more Definitive Securities of the same aggregate principal
      amount as the beneficial interest in the Global Security to be exchanged,
      such instructions to contain the name or names of the designated
      transferee or transferees, the authorized denomination or denominations of
      the Definitive Securities to be so issued and appropriate delivery
      instructions, (2) a certificate substantially in the form of Exhibit B
      attached hereto given by the owner of such beneficial interest, (3) a
      certificate substantially in the form of Exhibit C attached hereto given
      by the person acquiring the Definitive Securities for which such interest
      is being exchanged, to the effect set forth therein, and (4) such other
      certifications or other information and, in the

<PAGE>

      case of transfers pursuant to Rule 144 under the Securities Act, legal
      opinions as the Company may reasonably require to confirm that such
      transfer is being made pursuant to an exemption from, or in a transaction
      not subject to, the registration requirements of the Securities Act, then
      Euroclear or Cedel Bank, if applicable, or the Registrar, as the case may
      be, will instruct the Depositary to reduce or cause to be reduced such
      Global Security by the aggregate principal amount of the beneficial
      interest therein to be exchanged and to debit or cause to be debited from
      the account of the Person making such transfer the beneficial interest in
      the Global Security that is being transferred, and concurrently with such
      reduction and debit the Company shall execute, and the Trustee shall
      authenticate and deliver, one or more Definitive Securities of the same
      aggregate principal amount in accordance with the instructions referred to
      above.

                  (iii) Definitive Security to Definitive Security. If a holder
      of a Definitive Security wishes at any time to transfer such Definitive
      Security (or portion thereof) to a Person who is required to take delivery
      thereof in the form of a Definitive Security, such holder may, subject to
      the restrictions on transfer set forth herein and in such Definitive
      Security, cause the transfer of such Definitive Security (or any portion
      thereof in a principal amount equal to an authorized denomination) to such
      transferee. Upon receipt by the Registrar of (1) such Definitive Security,
      duly endorsed as provided herein, (2) instructions from such holder
      directing the Trustee to authenticate and deliver one or more Definitive
      Securities of the same aggregate principal amount as the Definitive
      Security (or portion thereof) to be transferred, such instructions to
      contain the name or names of the designated transferee or transferees, the
      authorized denomination or denominations of the Definitive Securities to
      be so issued and appropriate delivery instructions, (3) a certificate from
      the holder of the Definitive Security to be transferred in substantially
      the form of Exhibit B attached hereto, (4) a certificate substantially in
      the form of Exhibit C attached hereto given by the person acquiring the
      Definitive Securities (or portion thereof), to the effect set forth
      therein, and (5) such other certifications or other information and, in
      the case of transfers pursuant to Rule 144 under the Securities Act, legal
      opinions as the Company may reasonably require to confirm that such
      transfer is being made pursuant to an exemption from, or in a transaction
      not subject to, the registration requirements of the Securities Act, then
      the Registrar, shall cancel or cause to be canceled such Definitive
      Security and concurrently therewith, the Company shall execute, and the
      Trustee shall authenticate and deliver, one or more Definitive Securities
      in the appropriate aggregate principal amount, in accordance with the
      instructions referred to above and, if only a portion of a Definitive
      Security is transferred as aforesaid, concurrently therewith Company shall
      execute and the Trustee shall execute and deliver to

<PAGE>

      the transferor a Definitive Security in a principal amount equal to the
      principal amount which has not been transferred. A holder of a Definitive
      Security may at any time exchange such Definitive Security for one or more
      Definitive Securities of other authorized denominations and in the same
      aggregate principal amount and registered in the same name by delivering
      such Definitive Security, duly endorsed as provided herein, to the
      Registrar together with instructions directing the Trustee to authenticate
      and deliver one or more Definitive Securities in the same aggregate
      principal amount and registered in the same name as the Definitive
      Security to be exchanged, and the Registrar thereupon shall cancel or
      caused to be cancelled such Definitive Security and concurrently therewith
      the Company shall execute and Trustee shall authenticate and deliver, one
      or more Definitive Securities in the same aggregate principal amount and
      registered in the same name as the Definitive Security being exchanged.

                  (iv) Definitive Security to Global Security. If a holder of a
      Definitive Security wishes at any time to transfer such Definitive
      Security (or portion thereof) to a Person who is not required to take
      delivery thereof in the form of a Definitive Security, such holder shall,
      subject to the restrictions on transfer set forth herein and in such
      Definitive Security and the rules of the Depositary and Euroclear and
      Cedel Bank, as applicable, cause the exchange of such Definitive Security
      for a beneficial interest in the Global Security. Upon receipt by the
      Registrar of (1) such Definitive Security, duly endorsed as provided
      herein, (2) instructions from such holder directing the Trustee to
      increase the aggregate principal amount of the Global Security deposited
      with the Depository or with the Trustee as custodian for the Depository by
      the same aggregate principal amount at maturity as the Definitive Security
      to be exchanged, such instructions to contain the name or names of a
      member of, or participant in, the Depository that is designated as the
      transferee, the account of such member or participant and other
      appropriate delivery instructions, (3) the assignment form on the back of
      the Definitive Security completed in full (certifying in effect that such
      transfer complies with Rule 144A or Regulation S under the Securities Act
      or is otherwise being made to a Person who is not required to take
      delivery of such Security in the form of a Definitive Security) and (4)
      such other certifications or other information and, in the case of
      transfers pursuant to Rule 144 under the Securities Act, legal opinions as
      the Company may reasonably require to confirm that such transfer is being
      made pursuant to an exemption from, or in a transaction not subject to,
      the registration requirements of the Securities Act, then the Registrar,
      shall cancel or cause to be canceled such Definitive Security and
      concurrently therewith shall increase the aggregate principal amount of
      the Global Security by the same aggregate principal amount as the
      Definitive Security canceled.

<PAGE>

                  (v) Other Exchanges. In the event that a Global Security is
      exchanged for Securities in definitive registered form pursuant to Section
      2.10, prior to the effectiveness of a Shelf Registration Statement with
      respect to such Securities, such Securities may be exchanged only in
      accordance with such procedures as are substantially consistent with the
      provisions of clauses (ii) and (iii) above (including the certification
      requirements intended to ensure that such transfers comply with Rule 144A
      or Regulation S under the Securities Act, as the case may be) and such
      other procedures as may from time to time be adopted by the Company.

      (b) Except in connection with a Shelf Registration Statement contemplated
by and in accordance with the terms of the Registration Agreement, if Securities
are issued upon the registration of transfer, exchange or replacement of
Securities bearing a Restricted Securities Legend, or if a request is made to
remove such a Definitive Securities Legend on Securities, the Securities so
issued shall bear the Restricted Securities Legend, or a Restricted Securities
Legend shall not be removed, as the case may be, unless there is delivered to
the Company such satisfactory evidence, which, in the case of a transfer made
pursuant to Rule 144 under the Securities Act, may include an opinion of counsel
licensed to practice law in the State of New York, as may be reasonably required
by the Company, that neither the legend nor the restrictions on transfer set
forth therein are required to ensure that transfers thereof comply with the
provisions of Rule 144A, Rule 144 or Regulation S under the Securities Act or
that such Securities are not "restricted" within the meaning of Rule 144 under
the Securities Act. Upon provision to the Company of such satisfactory evidence,
the Trustee, at the written direction of the Company, shall authenticate and
deliver Securities that do not bear the legend. The Company shall not otherwise
be entitled to require the delivery of a legal opinion in connection with any
transfer or exchange of Securities.

      (c) Neither the Trustee nor any Agent shall have any responsibility for
any actions taken or not taken by the Depositary.

      (d) The Trustee shall have no obligation or duty to monitor, determine or
inquire as to compliance with any restrictions on transfer imposed under this
Indenture or under applicable law with respect to any transfer of any interest
in any Security (including any transfers between or among Depositary's
participants or beneficial owners of interests in any Global Security) other
than to require delivery of such certificates and other documentation as is
expressly required by, and to do so if and when expressly required by, the terms
of this Indenture and to examine the same to determine substantial compliance as
to form with the express requirements hereof.

      . If the holder of a Security claims that the Security has been lost,
destroyed or wrongfully taken or if such Security is mutilated and is
surrendered to the Registrar, the Company shall issue and the Trustee shall
authenticate a replacement Security if the Trustee's and the Company's
requirements (as shall have been previously communicated to the Trustee in a
written letter of standing instruction) are met. An indemnity bond must be
sufficient in the judgment of each of the foregoing to protect the Company, the
Trustee, any Agent or any authenticating agent from any loss which any of them
may suffer if a Security is replaced. The Company may charge for its expenses in
replacing a Security.

      In case any such mutilated, destroyed, lost or stolen Security has become
or is about to become due and payable, or is about to be redeemed or purchased
by the Company pursuant to Article III hereof or converted into shares of Common
Stock pursuant to Article V hereof, the Company in its discretion may, instead
of issuing a new Security, pay, redeem or convert such Security, as the case may
be.

      Every replacement Security is an additional obligation of the Company and
shall be entitled to all of the benefits of this Indenture equally and
proportionately with all other Securities duly issued hereunder. The provisions
of this Section 2.07 are exclusive and shall preclude (to the extent lawful) all
other rights and remedies with respect to the replacement of mutilated,
destroyed, lost or stolen Securities.

      . The Securities outstanding at any time are all the Securities
authenticated by the Trustee except for those canceled by it, those delivered to
it for cancellation, and those described in this Section as not outstanding.

<PAGE>

      If a Security is replaced, paid, redeemed or converted, it ceases to be
outstanding unless, in the case of a replaced Security, the Trustee receives
proof satisfactory to it that the replaced Security is held by a bona fide
purchaser.

      If Securities are considered paid under Section 4.01 hereof, they cease to
be outstanding and interest (and Liquidated Damages, if any) on them ceases to
accrue.

      Except as set forth in Section 2.09 hereof, a Security does not cease to
be outstanding because the Company or an Affiliate of the Company holds the
Security.

      . In determining whether the Noteholders of the required principal amount
of Securities have concurred in any direction, waiver or consent, Securities
owned by the Company or an Affiliate of the Company shall be considered as
though they are not outstanding, except that for the purposes of determining
whether the Trustee shall be protected in relying on any such direction, waiver
or consent, only Securities which a Trust Officer actually knows are so owned
shall be so disregarded.

      Section 2.10. Temporary Securities; Exchange of Global Security . r
Definitive Securities

      (a) Until definitive Securities are ready for delivery, the Company may
prepare and the Trustee shall authenticate temporary Securities. Temporary
Securities shall be substantially in the form of definitive Securities but may
have variations that the Company considers appropriate for temporary Securities
and shall be reasonably acceptable to the Trustee. Without unreasonable delay,
the Company shall prepare and the Trustee shall authenticate definitive
Securities in exchange for temporary Securities.

      (b) Except for transfers made in accordance with Section 2.06 (a), a
Global Security deposited with the Depositary or with the Trustee as custodian
for the Depositary pursuant to Section 2.01 shall be transferred to the
beneficial owners thereof in the form of certificated Securities in definitive
form only if such transfer complies with Section 2.06 and (i) the Depositary
notifies the Company that it is unwilling or unable to continue as Depositary
for such Global Security or if at any time such Depositary ceases to be a
"clearing agency" registered under the Exchange Act and a successor Depositary
is not appointed by the Company within 90 days of such notice, or (ii) an Event
of Default has occurred and is continuing.

      (c) Any Global Security or interest thereon that is transferable to the
beneficial owners thereof in the form of certificated Securities in definitive
form shall, if held by the Depository, be surrendered by the Depositary to the
Trustee, without charge, and the Trustee shall authenticate and deliver, upon
such transfer of each portion of such Global Security, an equal aggregate
principal amount of Securities of authorized denominations in the form of
certificated Securities in definitive form. Any portion of a Global Security
transferred pursuant to this Section shall be executed, authenticated and
delivered only in denominations of $1,000 and any integral multiple thereof and
registered in such names as the Depositary shall direct. Any Securities in the
form of certificated Securities in definitive form delivered in exchange for an
interest in the Global Security shall, except as otherwise provided by Section
2.06(b), bear the Restricted Definitive Securities Legend set forth in Exhibit A
hereto.

      (d) Prior to any transfer pursuant to Section 2.10(b), the registered
holder of a Global Security may grant proxies and otherwise authorize any
Person, including Agent Members and Persons that may hold interests through
Agent Members, to take any action which a holder is entitled to take under this
Indenture or the Securities.

      (e) The Company will make available to the Trustee a reasonable supply of
certificated Securities in definitive form without interest coupons.

      . The Company at any time may deliver Securities to the Registrar for
cancellation. The Registrar, Paying Agent and Conversion Agent shall forward to
the Trustee any Securities surrendered to them for registration of transfer,
redemption, conversion, exchange or payment. The Trustee shall promptly cancel
all Securities surrendered for registration of transfer, redemption, conversion,
exchange, payment, replacement or cancellation and shall dispose of all such
canceled Securities in accordance with its customary procedures. The Company may
not issue new Securities to replace Securities that it has paid or that have
been delivered to the Registrar for cancellation or that any holder has
converted.

      All Securities which are redeemed, purchased or otherwise acquired by the
Company or any of its Subsidiaries or Affiliates prior to the final maturity
date of the Securities shall be delivered to the Trustee for cancellation and
the Company

<PAGE>

may not hold or resell any such Securities or issue any new Securities to
replace any such Securities or any Securities that any holder has converted
pursuant to this Indenture.

      . Interest (including Liquidated Damages, if any) on any ved Security
which is payable, and is punctually paid or duly provided for on any March 15 or
September 15 shall be paid to the Person in whose name such Security (or one or
more predecessor Securities) is registered at the close of business on the
record date for such interest payment, which shall be the February 15 or August
15 (whether or not a Business Day) immediately preceding such interest payment
date.

      Any interest and Liquidated Damages, if any, on any Security which is
payable, but is not punctually paid or duly provided for, on any interest
payment date (herein collectively called "Defaulted Interest") shall forthwith
cease to be payable to the registered holder on the relevant record date, and,
except as hereinafter provided, such Defaulted Interest and any interest payable
on such Defaulted Interest may be paid by the Company, at its election, as
provided in subsection (a) or (b) below:

                (a) The Company may elect to make payment of any Defaulted
      Interest, and any interest payable on such Defaulted Interest, to the
      Persons in whose names the Securities are registered at the close of
      business on a special record date for the payment of such Defaulted
      Interest, which shall be fixed in the following manner. The Company shall
      notify the Trustee in writing of the amount of Defaulted Interest proposed
      to be paid on the Securities and the date of the proposed payment, and at
      the same time the Company shall deposit with the Trustee an amount of
      money equal to the aggregate amount proposed to be paid in respect of such
      Defaulted Interest (including Liquidated Damages, if any) or shall make
      arrangements satisfactory to the Trustee for such deposit prior to the
      date of the proposed payment, such money when deposited to be held in
      trust for the benefit of the Persons entitled to such Defaulted Interest
      as provided in this subsection (a). Thereupon, the Trustee shall fix a
      special record date for the payment of such Defaulted Interest which shall
      be not more than 15 calendar days and not less than 10 calendar days prior
      to the date of the proposed payment and not less than 10 calendar days
      after the receipt by the Trustee of the notice of the proposed payment.
      The Trustee shall promptly notify the Company of such special record date
      and, in the name and at the expense of the Company, shall cause notice of
      the proposed payment of such Defaulted Interest and the special record
      date therefor to be sent, first class mail, postage prepaid, to each
      holder at such holder's address as it appears in the register for the
      Securities, not less than 10 calendar days prior to such special record
      date. Notice of the proposed payment of such Defaulted Interest and the
      special record date therefor having been mailed as aforesaid, such
      Defaulted Interest shall be paid to the Persons in whose names the
      Securities are registered at the close of business on such special record
      date and shall no longer be payable pursuant to the following subsection
      (b).

                (b) The Company may make payment of any Defaulted Interest and
      any interest payable on such Defaulted Interest, on the Securities in any
      other lawful manner not inconsistent with the requirements of any
      securities exchange on which the Securities may be listed, and upon such
      notice as may be required by such exchange, if, after

<PAGE>

      notice given by the Company to the Trustee of the proposed payment
      pursuant to this clause, such manner of payment shall be deemed
      practicable by the Trustee.

      Subject to the foregoing provisions of this Section 2.12, each Security
delivered under this Indenture upon registration of transfer of, or in exchange
for, or in lieu of, or in substitution for, any other Security, shall carry the
rights to interest (and Liquidated Damages, if any) accrued and unpaid, and to
accrue, which were carried by such other Security.

      . Interest on the Securities shall be computed on the basis of a 360-day
year consisting of twelve 30-day months. In the event that any principal of or
premium, if any, or interest or Liquidated Damages, if any, on the Securities is
not paid when due, then except to the extent permitted by law, such overdue
principal, premium, if any, interest and Liquidated Damages, if any, shall bear
interest until paid at the Default Rate, compounded semi-annually. As used
herein, the term "Default Rate" means, as of any date and whether or not any
Securities are outstanding on such date, a rate per annum equal to (i) 5% per
annum plus (ii) if a Registration Default (as defined in the Registration
Agreement) has occurred and is continuing on such date, the per annum rate of
interest at which Liquidated Damages on the Securities are being computed on
such date or, if no Securities are outstanding on such date, the per annum rate
of interest at which Liquidated Damages on the Securities would have been
computed on such date if the Securities were outstanding.

      . The Company in issuing the Securities may use a "CUSIP" number in
notices of redemption or exchange as a convenience to holders; provided that any
such notice may state that no representation is made as to the correctness or
accuracy of the CUSIP number printed in the notice or on the Securities and that
reliance may be placed only on the other identification numbers printed on the
Securities. The Company shall promptly notify the Trustee of any change in the
CUSIP number.

      . The Company agrees that it will refuse to register any transfer of
Securities or any shares of Common Stock issued upon conversion of Securities
that is not made in accordance with the provisions of Regulation S under the
Securities Act, pursuant to a registration statement which has been declared
effective under the Securities Act or pursuant to an available exemption from
the registration requirements of the Securities Act; provided that the
provisions of this paragraph shall not be applicable to any Securities which do
not bear a Restricted Securities Legend or to any shares of Common Stock
evidenced by certificates which do not bear a Restricted Common Stock Legend.

      . Prior to due presentment of a Security for registration of transfer, the
Company, the Trustee and any Agent of the Company may treat the Person in whose
name such Security is registered as the owner of such Security for the purpose
of receiving payment of principal of and premium, if any, and (subject to
Sections 2.06 and 2.13 above) interest and Liquidated Damages, if any, on such
Security and for all other purposes whatsoever, whether or not such Security be
overdue, and neither the Company, the Trustee nor any Agent shall be affected by
notice to the contrary.

                                   ARTICLE III

                                   REDEMPTION

      . If the Company elects to redeem Securities pursuant to Section 3.07
hereof, it shall notify the Trustee in writing of the redemption date and the
principal amount of Securities to be redeemed. The Company shall give each
notice provided for in this Section 3.01 at least 45 days before the redemption
date (unless a shorter notice period shall be satisfactory to the Trustee).

      . If less than all the Securities are to be redeemed, the Trustee shall
select the Securities to be redeemed by a method that complies with the
requirements of the principal national securities exchange, if any, on which the
Securities are listed, or, if the Securities are not so listed, on a pro rata
basis, by lot or by such other method as the Trustee considers fair and
appropriate; provided, however, that no Securities of $1,000 in principal amount
or less shall be redeemed in part. The Trustee shall make the selection not more
than 60 days and not less than 30 days before the redemption date from
Securities outstanding not previously called for redemption. The Trustee may
select for redemption portions of the principal of Securities that have
denominations larger than $1,000. Securities and portions of them it selects
shall be in principal amounts of $1,000 or integral multiples of $1,000.
Provisions of this Indenture that apply to Securities called for

<PAGE>

redemption also apply to portions of Securities called for redemption. The
Trustee shall notify the Company promptly of the Securities or portions of
Securities to be called for redemption.

      If any Security selected for partial redemption is converted in part after
such selection, the converted portion of such Security shall be deemed (so far
as may be) to be the portion to be selected for redemption. The Securities (or
portions thereof) so selected shall be deemed duly selected for redemption for
all purposes hereof, notwithstanding that any such Security is converted in
whole or in part before the mailing of the notice of redemption. Upon any
redemption of less than all the Securities, the Company and the Trustee may
treat as outstanding any Securities surrendered for conversion during the period
15 days next preceding the mailing of a notice of redemption and need not treat
as outstanding any Security authenticated and delivered during such period in
exchange for the unconverted portion of any Security converted in part during
such period.

      . At least 30 days but not more than 60 days before a redemption date, the
Company shall mail a notice of redemption to each holder whose Securities are to
be redeemed at such holder's registered address.

      The notice shall identify the Securities to be redeemed (including the
CUSIP number) and shall state:

            (a) the redemption date;

            (b) the redemption price and the amount accrued and unpaid interest
      and Liquidated Damages, if any, to be paid;

            (c) if any Security is being redeemed in part, the portion of the
      principal amount of such Security to be redeemed and that, after the
      redemption date, upon cancellation of such Security, a new Security or
      Securities in principal amount equal to the unredeemed portion will be
      issued in the name of the holder thereof;

            (d) the name and address of the Paying Agent;

            (e) that Securities called for redemption must be surrendered to the
      Paying Agent to collect the redemption price plus accrued interest and
      Liquidated Damages, if any;

            (f) that, unless the Company defaults in making such redemption
      payment or the Paying Agent is prohibited from making such payment
      pursuant to the terms of this Indenture, by law or otherwise, interest and
      Liquidated Damages, if applicable, on Securities called for redemption
      cease to accrue on and after the redemption date;

            (g) the paragraph of the Securities pursuant to which the Securities
      called for redemption are being redeemed; and

            (h) any other information necessary to enable holders to comply with
      the notice of redemption.

      Such notice shall also state the current Conversion Price and the date on
which the right to convert such Securities or portions thereof into Common Stock
of the Company will expire.

      At the Company's request, the Trustee shall give notice of redemption in
the Company's name and at the Company's expense. In such event, the Company
shall provide the Trustee with the information required by this Section 3.03 in
a timely manner; provided that the Company shall give the Trustee not less than
60 days' written notice unless the Trustee consents to a shorter period.

<PAGE>

      . Once notice of redemption is mailed, Securities called for redemption
become due and payable on the redemption date at the price set forth in the
Security plus interest and Liquidated Damages, if any, accrued and unpaid to the
redemption date; provided that accrued interest and Liquidated Damages which are
due and payable on any interest payment date which is on or prior to the
redemption date shall be payable to the holders of such Securities, or one or
more predecessor Securities, registered as such at the close of business on the
relevant record date; and provided, further, that if a redemption date is not a
Business Day, payment shall be made on that next succeeding Business Day and no
interest shall accrue for the period from such redemption date to such
succeeding Business Day unless the Company shall default in the payment due on
such Business Day. Upon surrender to the Paying Agent, such Securities shall be
paid at the redemption price stated in such notice. Failure to give notice or
any defect in the notice to any holder shall not affect the validity of the
notice to any other holder.

      The notice if mailed in the manner herein provided shall be conclusively
presumed to have been given. In any case, failure to give such notice to any
holder or any defect in the notice to any holder of any Security designated for
redemption as a whole or in part shall not affect the validity of the
proceedings for the redemption of any other Securities.

      . Prior to 10:00 A.M. (New York City time) on the redemption date, the
Company shall deposit with the Trustee or the Paying Agent in immediately
available funds, money sufficient to pay the redemption price of and accrued and
unpaid interest and Liquidated Damages, if applicable, to but not including the
redemption date on all Securities to be redeemed on that date (subject to the
right of holders of record on the relevant record date to receive interest (and
Liquidated Damages, if applicable) due on an interest payment date) unless
theretofore converted into Common Stock pursuant to the provisions hereof. The
Trustee or such Paying Agent shall return to the Company any money not required
for that purpose.

      So long as the Company complies with the preceding paragraph and the other
provisions of this Article III and unless the Paying Agent is prohibited from
making such payment pursuant to the terms of this Indenture, by law or
otherwise, interest (and Liquidated Damages, if any) on the Securities to be
redeemed on the applicable redemption date shall cease to accrue from and after
such redemption date and such Securities or portions thereof shall be deemed not
to be entitled to any benefit under this Indenture except to receive payment on
the redemption date of the redemption price plus interest and Liquidated
Damages, if any, accrued and unpaid to the redemption date. If any Security
called for redemption shall not be so paid upon surrender for redemption, then,
from the redemption date until such redemption price (including, without
limitation, accrued interest and Liquidated Damages, if any) is paid in full,
the Company shall pay interest, to the extent permitted by law, on the unpaid
principal of and premium, if any, interest and Liquidated Damages, if any, on
such Security at the Default Rate, compounded semiannually.

      . Upon surrender of a Security that is redeemed in part, the Company shall
issue and the Trustee shall authenticate for the holder at the expense of the
Company a new Security equal in principal amount to the unredeemed portion of
the Security surrendered.

      . The Company may redeem all or any portion of the Securities, upon the
terms and at the redemption prices set forth in each of the Securities. Any
redemption pursuant to this Section 3.07 shall be made pursuant to the
provisions of Section 3.01 through 3.06 hereof.

      Section 3.08. Designated Event Offer

      (a) In the event that, pursuant to Section 4.07 hereof, the Company shall
commence a Designated Event Offer, the Company shall follow the procedures in
this Section 3.08.

      (b) The Designated Event Offer shall remain open for a period specified by
the Company which shall be no less than 30 days and no more than 60 days from
and including the date of the mailing of notice in accordance with Section
3.08(d) hereof (the "Commencement Date"), except to the extent that a longer
period is required by applicable law (the "Tender Period"). On the day (the
"Designated Event Payment Date") immediately following the last day of the
Tender Period, the Company shall purchase the principal amount of Securities
duly surrendered for repurchase and not withdrawn.

      (c) If a Designated Event Payment Date is after a record date and before
the related interest payment date, accrued interest and Liquidated Damages, if
any, to the related interest payment date will be paid to the persons in whose
names the Securities (or one or more predecessor Securities) are registered at
the close of business on such record date, notwithstanding the repurchase of any
such Securities on such Designated Event Payment Date, and no additional
interest or Liquidated

<PAGE>

Damages, if any, will be payable to Noteholders who tender Securities for
purchase on such Designated Event Payment Date.

      (d) The Company shall provide the Trustee with written notice of the
Designated Event Offer at least 10 Business Days before the Commencement Date.

      (e) Within 30 days following any Designated Event, unless the Company is
entitled to and has previously elected to redeem all of the outstanding
Securities at its option and has previously given holders notice of its
intention to redeem all of the outstanding Securities in accordance with Article
III of this Indenture, the Company or the Trustee (at the request and expense of
the Company) shall send, by first class mail, a notice to each of the
Noteholders, which shall govern the terms of the Designated Event Offer and
shall state:

                  (i) that the Designated Event Offer is being made pursuant to
      this Section 3.08 and Section 4.07 hereof and that all Securities validly
      tendered will be accepted for payment;

                  (ii) the purchase price (as determined in accordance with
      Section 4.07 hereof , subject to Section 3.08(c) hereof), the length of
      time the Designated Event Offer will remain open and the Designated Event
      Payment Date;

                  (iii) that any Security or portion thereof not validly
      tendered or accepted for payment will continue to accrue interest and
      Liquidated Damages, if applicable, and will continue to have conversion
      rights;

                  (iv) that, unless the Company defaults in the payment of the
      Designated Event Payment, any Security or portion thereof accepted for
      payment pursuant to the Designated Event Offer shall cease to accrue
      interest and Liquidated Damages, if applicable, from and after the
      Designated Event Payment Date and will cease to have conversion rights
      after the Designated Event Payment Date;

                  (v) that Noteholders electing to have a Security or portion
      thereof purchased pursuant to any Designated Event Offer will be required
      to surrender the Security, with the form entitled "Option of Noteholder To
      Elect Purchase" on the reverse of the Security completed, to a Paying
      Agent at the address specified in the notice (which shall include and
      address in the Borough of Manhattan, The City of New York) prior to the
      close of business on the third Business Day preceding the Designated Event
      Payment Date;

                  (vi) that Noteholders will be entitled to withdraw their
      election if a Paying Agent receives, not later than the close of business
      on the second Business Day preceding the Designated Event Payment Date, a
      letter or facsimile transmission setting forth the name of the Noteholder,
      the principal amount of the Securities or portion thereof delivered for
      purchase and a statement that such Noteholder is withdrawing his election
      to have such Securities or portions thereof purchased; and

                  (vii) that Noteholders whose Securities are

<PAGE>

      being purchased only in part will be issued new Securities equal in
      principal amount to the unpurchased portion of the Securities surrendered,
      which unpurchased portion must be equal to $1,000 in principal amount or
      an integral multiple thereof.

      In addition, the notice shall contain all instructions, other information
and materials that the Company shall reasonably deem necessary to enable such
Noteholders to tender Securities pursuant to the Designated Event Offer or to
withdraw tendered Securities. If the Company is not required to mail such notice
because, as provided above, it has previously given notice of its intention to
redeem the Securities in whole but the Company thereafter defaults in the
payment of the redemption price (including accrued interest and Liquidated
Damages, if any) on any of the Securities on the relevant redemption date, then
the Company shall be required to give notice pursuant to this Section 3.08(e) no
later than the second Business Day following such redemption date, in which case
the Tender Period shall be 30 days except to the extent that a longer period is
required by applicable law. In the event that the Company is required by
applicable law to extend the Tender Period beyond the Designated Event Payment
Date set forth in such notice, the Company will, as promptly as possible, issue
a press release and send notice to holders announcing such extension and the new
Designated Event Payment Date, which press release and notice shall state the
new deadlines for surrendering and withdrawing Securities.

      (f) Prior to 10:00 A.M. (New York City Time) on the Designated Event
Payment Date, the Company shall irrevocably deposit with the Trustee or the
Paying Agent in immediately available funds an amount equal to the Designated
Event Payment in respect of all Securities or portions thereof validly tendered
and not withdrawn, such funds to be held for payment in accordance with the
terms of this Section 3.08. On the Designated Event Payment Date, the Company
shall, to the extent lawful, (i) accept for payment the Securities or portions
thereof validly tendered pursuant to the Designated Event Offer, (ii) deliver or
cause to be delivered to the Trustee the Securities so accepted and (iii)
deliver to the Trustee an Officers' Certificate identifying the Securities or
portions thereof tendered and not withdrawn to the Company and stating that such
Securities have been accepted for payment by the Company in accordance with the
terms of this Section 3.08. The Paying Agent shall promptly (but in any case not
later than five calendar days after the Designated Event Payment Date) mail or
deliver to each holder of Notes so accepted for payment an amount equal to the
Designated Event Payment for such Securities, and the Trustee shall promptly
authenticate and mail or otherwise deliver to each such Noteholder a new
Security equal in principal amount to any unpurchased portion of the Security
surrendered; provided that each new Security shall be in a principal amount of
$1,000 or an integral multiple thereof. Any Securities not so accepted shall be
promptly mailed or otherwise delivered by or on behalf of the Company to the
holders thereof. The Company will publicly announce the results of the
Designated Event Offer on, or as soon as practicable after, the Designated Event
Payment Date.

      (g) The Designated Event Offer shall be made by the Company in compliance
with all applicable provisions of the Exchange Act and any other securities laws
and regulations (including, without limitation, Rules 13e-4 and 14e-1 under the
Exchange Act) to the extent such laws and regulations are applicable in
connection with the repurchase of the Securities in connection with a Designated
Event.

      . The Company is not required to make mandatory redemption or sinking fund
payments with respect to the Securities.

                                   ARTICLE IV

                                    COVENANTS

      . The Company shall pay the principal of, premium, if any, and interest
(and Liquidated Damages, if applicable) on the Securities on the dates and in
the manner provided in the Securities and this Indenture. Principal, premium, if
any, and interest (and Liquidated Damages, if applicable) shall be considered
paid on the date due if the Paying Agent (other than the Company or an Affiliate
of the Company) holds on that date money designated for and sufficient to pay
all principal, premium, if any and interest (and Liquidated Damages, if any)
then due and such Paying Agent is not prohibited from paying such money to the
Noteholders on that date pursuant to the terms of this Indenture. To the extent
lawful, the Company shall pay interest (including post-petition interest in any
proceeding under any Bankruptcy Law) on overdue installments of interest (and on
overdue principal, premium, if any, and Liquidated Damages, if applicable (in
each case without regard to any applicable grace period)), at the Default Rate,
 compounded semiannually.

<PAGE>

      . The Company will comply with the requirements of TIA Section 314(a). In
addition, whether or not required by the rules and regulations of the SEC, so
long as any Securities are outstanding, the Company will file with the SEC and
furnish (without exhibits) to the Trustee and to the holders of Securities all
quarterly and annual financial information required to be contained in a filing
with the SEC on Forms 10-Q and 10-K, including a "Management's Discussion and
Analysis of Financial Conditions and Results of Operations" and, with respect to
annual consolidated financial statements only, a report on the annual
consolidated financial statements by the Company's certified independent
accountants. The Company shall not be required to file any report or other
information with the SEC if the SEC does not permit such filing. Delivery of
such reports, information and documents to the Trustee is for informational
purposes only and the Trustee's receipt thereof shall not constitute
constructive notice of any information contained therein or determinable from
information contained therein, including the Company's compliance with any of
its covenants hereunder.

      In addition, if the Company at any time is not subject to either Section
13 or 15(d) of the Exchange Act, the Company will provide to each holder and
beneficial owner of Securities and shares of Common Stock issued upon conversion
of Securities, and to any prospective purchaser designated by any such holder or
beneficial owner, upon request, the information required pursuant to Rule
144A(d)(4) of the Securities Act.

      . The Company shall deliver to the Trustee, within 120 days after the end
of each fiscal year of the Company, an Officers' Certificate stating that a
review of the activities of the Company and its subsidiaries during the
preceding fiscal year has been made under the supervision of the signing
Officers with a view to determining whether the Company has kept, observed,
performed and fulfilled its obligations under, and complied with the covenants
and conditions contained in, this Indenture, and further stating, as to each
such Officer signing such certificate, that to the best of such Officer's
knowledge the Company has kept, observed, performed and fulfilled each and every
covenant, and complied with the covenants and conditions contained in this
Indenture and is not in default in the performance or observance of any of the
terms, provisions and conditions hereof (or, if a Default or Event of Default
shall have occurred, describing all such Defaults or Events of Default of which
such Officer may have knowledge) and that to the best of such Officer's
knowledge no event has occurred and remains in existence by reason of which
payments on account of the principal of, or premium, if any, interest or
Liquidated Damages, if any, on, the Securities are prohibited.

      One of the Officers signing such Officers' Certificate shall be either the
Company's principal executive officer, principal financial officer or principal
accounting officer.

      The Company will, so long as any of the Securities are outstanding,
deliver to the Trustee, forthwith upon, but in any event within five Business
Days after, becoming aware of:

            (a) any Default, Event of Default or default in the performance of
      any covenant, agreement or condition contained in this Indenture; or

            (b) any default under any other mortgage, indenture or instrument of
      the nature described in Section 8.01(e),

an Officers' Certificate specifying such Default, Event of Default or default
and what action the Company is taking or proposing to take with respect thereto.

      Immediately upon the occurrence of any event giving rise to an obligation
of the Company to pay Liquidated Damages with respect to the Securities in
accordance with paragraph 11 of the form thereof and the Registration Agreement
or the termination of any such obligation, the Company shall give the Trustee
notice of such commencement or termination, of the obligation to pay Liquidated
Damages with regard to the Securities and the amount thereof and of the event
giving rise to such commencement or termination (such notice to be contained in
an Officers' Certificate), and prior to receipt of such Officers' Certificate
the Trustee shall be entitled to assume that no such commencement or termination
has occurred, as the case may be.

      . The Company covenants (to the extent that it may lawfully do so) that it
will not at any time insist upon, plead, or in any manner whatsoever claim or
take the benefit or advantage of, any stay, extension or usury law wherever
enacted, now or at any time hereafter in force, which may affect the covenants
or the performance of this Indenture; and the Company (to the extent it may
lawfully do so) hereby expressly waives all benefit or advantage of any such
law, and covenants that it

<PAGE>

will not, by resort to any such law, hinder, delay or impede the execution of
any power herein granted to the Trustee, but will suffer and permit the
execution of every such power as though no such law has been enacted.

      . Except as provided in Article VII hereof, the Company will do or cause
to be done all things necessary to preserve and keep in full force and effect
its corporate existence and the corporate, partnership or other existence of
each Subsidiary of the Company in accordance with the respective organizational
documents of the Company and each Subsidiary and the rights (charter and
statutory), licenses and franchises of the Company and its Subsidiaries;
provided, however, that the Company shall not be required to preserve any such
right, license or franchise, or the corporate, partnership or other existence of
any Subsidiary, if the Board of Directors shall determine that the preservation
thereof is no longer desirable in the conduct of the business of the Company and
its Subsidiaries taken as a whole and that the loss thereof is not adverse in
any material respect to the Noteholders.

      . The Company shall pay, and shall cause each of its Subsidiaries to pay,
prior to delinquency, all taxes, assessments and governmental levies, except
such as are contested in good faith and by appropriate proceedings and for which
adequate reserves in accordance with GAAP or other appropriate provisions have
been made.

      . Upon the occurrence of a Designated Event, each holder of Securities
shall have the right, in accordance with this Section 4.07 and Section 3.08
hereof, to require the Company to repurchase all or any part (equal to $1,000 or
an integral multiple thereof) of such holder's Securities pursuant to the terms
of an offer made as provided in Section 3.08 (the "Designated Event Offer") at a
purchase price equal to 100% of the principal amount thereof, plus accrued and
unpaid interest and Liquidated Damages, if any, thereon to the Designated Event
Payment Date (the "Designated Event Payment").

      . As long as any Securities are outstanding, the Company will conduct its
business and operations so as not to become an "investment company" within the
meaning of the Investment Company Act of 1940, as amended (the "Investment
Company Act"), and will take all steps required in order for it to continue not
to be an "investment company" and not to be required to be registered under the
Investment Company Act, including, if necessary, redeployment of the assets of
the Company.

                                    ARTICLE V

                                   CONVERSION

      . A holder of any Security may convert the principal amount thereof (or
any portion thereof that is an integral multiple of $1,000) into fully paid and
nonassessable shares of Common Stock of the Company at any time after 90 days
following the Issuance Date and prior to the close of business on the Business
Day immediately preceding the final maturity date of the Security at the
Conversion Price then in effect, except that, with respect to any Security
called for redemption, such conversion right shall terminate at the close of
business on the Business Day immediately preceding the redemption date (unless
the Company shall default in making the redemption payment when it becomes due,
in which case the conversion right shall terminate at the close of business on
the date on which such default is cured). The number of shares of Common Stock
issuable upon conversion of a Security is determined by dividing the principal
amount of the Security converted by the Conversion Price in effect on the
Conversion Date.

      "Conversion Price" means $165.00, as the same may be adjusted from time to
time as provided in this Article V; provided that, for purposes of clarity, it
is hereby understood and agreed that, upon the occurrence of the Stock Split
(which it is currently contemplated will occur on April 2, 1999), the Conversion
Price will, pursuant to Section 5.06(a) hereof, automatically be adjusted to
$82.50 per share.

      Provisions of this Indenture that apply to conversion of all of a Security
also apply to conversion of a portion of it. A holder of Securities is not
entitled to any rights of a holder of Common Stock until such holder of
Securities has converted such Securities into Common Stock, and only to the
extent that such Securities are deemed to have been converted into Common Stock
under this Article V.

      . To convert a Security, a holder must satisfy the requirements in
paragraph 10 of the Securities. The date on which the holder satisfies all of
those requirements is the conversion date (the "Conversion Date"). As promptly
as practicable

<PAGE>

on or after the Conversion Date, the Company shall issue and deliver to the
Trustee a certificate or certificates for the number of whole shares of Common
Stock issuable upon the conversion and a check or other payment for any
fractional share in an amount determined pursuant to Section 5.03. Such
certificate or certificates will be sent by the Trustee to the Conversion Agent
for delivery to the holder. The Person in whose name the certificate is
registered shall become the stockholder of record on the Conversion Date and, as
of such date, such Person's rights as a Noteholder with respect to the converted
Security shall cease; provided, however, that, except as otherwise provided in
this Section 5.02, no surrender of a Security on any date when the stock
transfer books of the Company shall be closed shall be effective to constitute
the Person entitled to receive the shares of Common Stock upon such conversion
as the stockholder of record of such shares of Common Stock on such date, but
such surrender shall be effective to constitute the Person entitled to receive
such shares of Common Stock as the stockholder of record thereof for all
purposes at the close of business on the next succeeding day on which such stock
transfer books are open; provided, further, however, that such conversion shall
be at the Conversion Price in effect on the date that such Security shall have
been surrendered for conversion, as if the stock transfer books of the Company
had not been closed.

      No payment or adjustment will be made for accrued and unpaid interest or
Liquidated Damages on a converted Security or for dividends or distributions on,
or Liquidated Damages, if any, attributable to, shares of Common Stock issued
upon conversion of a Security, except that, if any holder surrenders a Security
for conversion after the close of business on any record date for the payment of
an installment of interest and prior to the opening of business on the next
succeeding interest payment date, then, notwithstanding such conversion, accrued
and unpaid interest and Liquidated Damages, if applicable, payable on such
Security on such interest payment date shall be paid on such interest payment
date to the person who was the holder of such Security (or one or more
predecessor Securities) at the close of business on such record date. In the
case of any Security surrendered for conversion after the close of business on a
record date for the payment of an installment of interest and prior to the
opening of business on the next succeeding interest payment date, then, unless
such Security has been called for redemption on a redemption date or is to be
repurchased on a Designated Event Payment Date after such record date and prior
to such interest payment date, such Security, when surrendered for conversion,
must be accompanied by payment in an amount equal to the interest and Liquidated
Damages, if applicable, payable on such interest payment date on the principal
amount of such Security so converted. Holders of Common Stock issued upon
conversion will not be entitled to receive any dividends payable to holders of
Common Stock as of any record time before the close of business on the
Conversion Date.

      If a holder converts more than one Security at the same time, the number
of whole shares of Common Stock issuable upon the conversion shall be based on
the total principal amount of Securities converted.

      Upon surrender of a Security that is converted in part, the Trustee shall
authenticate for the holder a new Security equal in principal amount to the
unconverted portion of the Security surrendered.

      . The Company will not issue fractional shares of Common Stock upon
conversion of a Security. In lieu thereof, the Company will pay an amount in
cash based upon the Daily Market Price of the Common Stock on the Trading Day
prior to the Conversion Date.

      . The issuance of certificates for shares of Common Stock upon the
conversion of any Security shall be made without charge to the converting
Noteholder for such certificates or for any tax in respect of the issuance of
such certificates, and such certificates shall be issued in the respective names
of, or in such names as may be directed by, the holder or holders of the
converted Security; provided, however, that in the event that certificates for
shares of Common Stock are to be issued in a name other than the name of the
holder of the Security converted, such Security, when surrendered for
conversion, shall be accompanied by an instrument of assignment or transfer, in
form satisfactory to the Company, duly executed by the registered holder thereof
or his duly authorized attorney; and provided, further, however, that the
Company shall not be required to pay any tax which may be payable in respect of
any transfer involved in the issuance and delivery of any such certificates in a
name other than that of the holder of the converted Security, and the Company
shall not be required to issue or deliver such certificates unless or until the
person or persons requesting the issuance thereof shall have paid to the Company
the amount of such tax or shall have established to the satisfaction of the
Company that such tax has been paid or is not applicable.

      . The Company shall at all times reserve and keep available, free from
preemptive rights, out of its authorized but unissued Common Stock, solely for
the purpose of issuance upon conversion of Securities as herein provided, a
sufficient number of shares of Common Stock to permit the conversion of all
outstanding Securities for shares of Common Stock.

<PAGE>

      All shares of Common Stock which may be issued upon conversion of the
Securities shall be duly authorized, validly issued, fully paid and
nonassessable when so issued. The Company shall take such action from time to
time as shall be necessary so that par value of the Common Stock shall at all
times be equal to or less than the Conversion Price then in effect.

      The Company shall from time to time take all action necessary so that the
Common Stock which may be issued upon conversion of Securities, immediately upon
their issuance (or, if such Common Stock is subject to restrictions on transfer
under the Securities Act, upon their resale pursuant to an effective Shelf
Registration Statement or in a transaction pursuant to which the certificate
evidencing such Common Stock shall no longer bear the Restricted Common Stock
Legend), will be listed on the principal securities exchanges, interdealer
quotation systems (including the NNM) and markets, if any, on which other shares
of Common Stock of the Company are then listed or quoted.

      The Conversion Price shall be subject to adjustment from time to time as
follows:

      (a) In case the Company shall (1) pay a dividend in shares of Common Stock
to holders of Common Stock, (2) make a distribution in shares of Common Stock to
holders of Common Stock, (3) subdivide its outstanding shares of Common Stock
into a greater number of shares of Common Stock or (4) combine its outstanding
shares of Common Stock into a smaller number of shares of Common Stock, the
Conversion Price in effect immediately prior to such action shall be adjusted so
that the holder of any Security thereafter surrendered for conversion shall be
entitled to receive the number of shares of Common Stock which he would have
owned immediately following such action had such Securities been converted
immediately prior thereto. Any adjustment made pursuant to this subsection (a)
shall become effective immediately after the record date in the case of a
dividend or distribution and shall become effective immediately after the
effective date in the case of a subdivision or combination.

      (b) In case the Company shall issue rights or warrants to all holders of
Common Stock entitling them to subscribe for or purchase shares of Common Stock
(or securities convertible into Common Stock) at a price per share (or having a
conversion price per share) less than the Current Market Price per share (as
determined pursuant to subsection (f) below) of the Common Stock on the record
date for determining the holders of the Common Stock entitled to receive such
rights or warrants, the Conversion Price shall be adjusted so that the same
shall equal the price determined by multiplying the Conversion Price in effect
immediately prior to such record date by a fraction of which the numerator shall
be the number of shares of Common Stock outstanding as of the close of business
on such record date plus the number of shares of Common Stock which the
aggregate offering price of the total number of shares of Common Stock so
offered for subscription or purchase (or the aggregate conversion price of the
convertible securities so offered) would purchase at such Current Market Price,
and of which the denominator shall be the number of shares of Common Stock
outstanding on such record date plus the number of additional shares of Common
Stock so offered for subscription or purchase (or into which the convertible
securities so offered are convertible). Such adjustments shall become effective
immediately after such record date. For the purposes of this subsection (b), the
number of shares of Common Stock at any time outstanding shall not include
shares held in the treasury of the Company but shall include shares issuable in
respect of scrip certificates issued in lieu of fractions of shares of such
Common Stock. The Company shall not issue any rights, options or warrants in
respect of shares of Common Stock held in the treasury of the Company.

      (c) In case the Company shall distribute to all holders of Common Stock
shares of Capital Stock of the Company (other than Common Stock), evidences of
indebtedness, cash, rights or warrants entitling the holders thereof to
subscribe for or purchase securities (other than rights or warrants described in
subsection (b) above) or other assets (including securities of Persons other
than the Company but excluding (i) dividends or distributions paid exclusively
in cash, (ii) dividends and distributions described in subsection (b) above and
(iii) distributions in connection with the consolidation, merger or transfer of
assets covered by Section 5.13), then in each such case the Conversion Price
shall be adjusted so that the same shall equal the price determined by
multiplying the Conversion Price in effect immediately prior to the date of such
distribution by a fraction of which the numerator shall be the Current Market
Price (determined as provided in subsection (f) below) of the Common Stock on
the record date mentioned below less the fair market value on such record date
(as determined by the Board of Directors, whose determination shall be
conclusive evidence of such fair market value and described in a Board
Resolution delivered to the Trustee) of the portion of the evidences of
indebtedness, shares of Capital Stock, cash, rights, warrants or other assets so
distributed applicable to one share of Common Stock (determined on the basis of
the number of shares of the Common Stock outstanding on the record date), and of
which the denominator shall be such Current Market Price of the Common Stock.
Such adjustment shall become effective immediately after the record date for the
determination of the holders of Common Stock entitled to receive such
distribution. Notwithstanding the foregoing, in case the Company

<PAGE>

shall distribute rights or warrants to subscribe for additional shares of the
Company's Capital Stock (other than rights or warrants referred to in subsection
(b) above) ("Rights") to all holders of Common Stock, the Company may, in lieu
of making any adjustment pursuant to the foregoing provisions of this Section
5.06(c), make proper provision so that each holder of a Security who converts
such Security (or any portion thereof) after the record date for such
distribution and prior to the expiration or redemption of the Rights shall be
entitled to receive upon such conversion, in addition to the shares of Common
Stock issuable upon such conversion (the "Conversion Shares"), a number of
Rights to be determined as follows: (i) if such conversion occurs on or prior to
the date for the distribution to the holders of Rights of separate certificates
evidencing such Rights (the "Distribution Date"), the same number of Rights to
which a holder of a number of shares of Common Stock equal to the number of
Conversion Shares is entitled at the time of such conversion in accordance with
the terms and provisions of and applicable to the Rights; and (ii) if such
conversion occurs after the Distribution Date, the same number of Rights to
which a holder of the number of shares of Common Stock into which the principal
amount of the Security so converted was convertible immediately prior to the
Distribution Date would have been entitled on the Distribution Date in
accordance with the terms and provisions of and applicable to the Rights.

      (d) In case the Company shall, by dividend or otherwise, at any time make
a distribution to all holders of its Common Stock exclusively in cash (including
any distributions of cash out of current or retained earnings of the Company but
excluding any cash that is distributed as part of a distribution requiring a
Conversion Price adjustment pursuant to paragraph (c) of this Section) in an
aggregate amount that, together with the sum of (x) the aggregate amount of any
other distributions made exclusively in cash to all holders of Common Stock
within the 12 months preceding the date fixed for determining the stockholders
entitled to such distribution (the "Distribution Record Date") and in respect of
which no Conversion Price adjustment pursuant to paragraph (c) or (e) of this
Section or this paragraph (d) has been made plus (y) the aggregate amount of all
Excess Payments in respect of any tender offers or other negotiated transactions
by the Company or any of its Subsidiaries for Common Stock concluded within the
12 months preceding the Distribution Record Date and in respect of which no
Conversion Price adjustment pursuant to paragraphs (c) or (e) of this Section or
this paragraph (d) has been made, exceeds 12.5% of the product of the Current
Market Price per share (determined as provided in paragraph (f) of this Section)
of the Common Stock on the Distribution Record Date multiplied by the number of
shares of Common Stock outstanding on the Distribution Record Date (excluding
shares held in the treasury of the Company), the Conversion Price shall be
reduced so that the same shall equal the price determined by multiplying such
Conversion Price in effect immediately prior to the effectiveness of the
Conversion Price reduction contemplated by this paragraph (d) by a fraction of
which the numerator shall be the Current Market Price per share (determined as
provided in paragraph (f) of this Section) of the Common Stock on the
Distribution Record Date less the sum of the aggregate amount of cash and the
aggregate Excess Payments so distributed, paid or payable within such 12 month
period (including, without limitation, the distribution in respect of which such
adjustment is being made) applicable to one share of Common Stock (which shall
be determined by dividing the sum of the aggregate amount of cash and the
aggregate Excess Payments so distributed, paid or payable within such 12 months
(including, without limitation, the distribution in respect of which such
adjustment is being made) by the number of shares of Common Stock outstanding on
the Distribution Record Date and the denominator shall be such Current Market
Price per share (determined as provided in paragraph (f) of this Section) of the
Common Stock on the Distribution Record Date, such reduction to become effective
immediately prior to the opening of business on the day following the
Distribution Record Date.

      (e) In case a tender offer or other negotiated transaction made by the
Company or any Subsidiary of the Company for all or any portion of the Common
Stock shall be consummated, if an Excess Payment is made in respect of such
tender offer or other negotiated transaction and the aggregate amount of such
Excess Payment, together with the sum of (x) the aggregate amount of any
distributions, by dividend or otherwise, to all holders of the Common Stock made
in cash (including any distributions of cash out of current or retained earnings
of the Company) within the 12 months preceding the date of payment of such
current negotiated transaction consideration or expiration of such current
tender offer, as the case may be (the "Purchase Date"), and as to which no
adjustment in the Conversion Price pursuant to paragraph (c) or paragraph (d) of
this Section or this paragraph (e) has been made plus (y) the aggregate amount
of all Excess Payments in respect of any other tender offers or other negotiated
transactions by the Company or any of its Subsidiaries for Common Stock
concluded within the 12 months preceding the Purchase Date and in respect of
which no adjustment in the Conversion Price pursuant to paragraph (c) or (d) of
this Section or this paragraph (e) has been made, exceeds 12.5% of the product
of the Current Market Price per share (determined as provided in paragraph (f)
of this Section) of the Common Stock on the Purchase Date multiplied by the
number of shares of Common Stock outstanding on the Purchase Date (including any
tendered shares but excluding any shares held in the treasury of the Company),
the Conversion Price shall be reduced so that the same shall equal the price
determined by multiplying such Conversion Price in effect immediately prior to
the effectiveness of the Conversion Price reduction contemplated by this
paragraph (e) by a fraction of which the numerator shall be the Current Market
Price per share

<PAGE>

(determined as provided in paragraph (f) of this Section) of the Common Stock on
the Purchase Date less the sum of the aggregate amount of cash and the aggregate
Excess Payments so distributed, paid or payable within such 12 month period
(including, without limitation, the Excess Payment in respect of which such
adjustment is being made) applicable to one share of Common Stock (which shall
be determined by dividing the sum of the aggregate amount of cash and the
aggregate Excess Payments so distributed, paid or payable within such 12 months
(including, without limitation, the Excess Payment in respect of which such
adjustment is being made) by the number of shares of Common Stock outstanding on
the Purchase Date and the denominator shall be such Current Market Price per
share (determined as provided in paragraph (f) of this Section) of the Common
Stock on the Purchase Date, such reduction to become effective immediately prior
to the opening of business on the day following the Purchase Date.

      (f) The "Current Market Price" per share of Common Stock on any date shall
be deemed to be the average of the Daily Market Prices for the shorter of (i) 30
consecutive Trading Days ending on the last full Trading Day on the exchange or
market referred to in determining such Daily Market Prices prior to the time of
determination or (ii) the period commencing on the date next succeeding the
first public announcement of the issuance of such rights or such warrants or
such other distribution or such tender offer or other negotiated transaction
through such last full Trading Day on the exchange or market referred to in
determining such Daily Market Prices prior to the time of determination.

      (g) "Excess Payment" means the excess of (A) the aggregate of the cash and
fair market value (as determined by the Board of Directors, whose determination
shall be conclusive evidence of such fair market value and described in a Board
Resolution delivered to the Trustee) of other consideration paid by the Company
or any of its Subsidiaries with respect to the shares acquired in a tender offer
or other negotiated transaction over (B) the Daily Market Price on the Trading
Day immediately following the completion of the tender offer or other negotiated
transaction multiplied by the number of acquired shares.

      (h) In any case in which this Section 5.06 shall require that an
adjustment be made immediately following a record date for an event, the Company
may elect to defer, until such event, issuing to the holder of any Security
converted after such record date the shares of Common Stock and other Capital
Stock of the Company issuable upon such conversion over and above the shares of
Common Stock and other Capital Stock of the Company issuable upon such
conversion on the basis of the Conversion Price prior to adjustment; and, in
lieu of the shares the issuance of which is so deferred, the Company shall issue
or cause its transfer agents to issue due bills or other appropriate evidence of
the right to receive such shares.

      Section 5.07. No Adjustment. No adjustment in the Conversion Price shall
be required until cumulative adjustments amount to 1% or more of the Conversion
Price as last adjusted; provided, however, that any adjustments which by reason
of this Section 5.07 are not required to be made shall be carried forward and
taken into account in any subsequent adjustment. All calculations under this
Article V shall be made to the nearest cent or to the nearest one-hundredth of a
share, as the case may be. No adjustment need be made for rights to purchase
Common Stock pursuant to a Company plan for reinvestment of dividends or
interest. No adjustment need be made for a change in the par value or no par
value of the Common Stock.

      Section 5.08. Other Adjustments.

      (a) In the event that, as a result of an adjustment made pursuant to
Section 5.06 above, the holder of any Security thereafter surrendered for
conversion shall become entitled to receive any shares of Capital Stock of the
Company other than shares of its Common Stock, thereafter the Conversion Price
of such other shares so receivable upon conversion of any Securities shall be
subject to adjustment from time to time in a manner and on terms as nearly
equivalent as practicable to the provisions with respect to Common Stock
contained in this Article V.

      (b) In the event that any shares of Common Stock issuable upon exercise of
any of the rights, options or warrants referred to in Section 5.06(b) and
Section 5.06(c) hereof are not delivered prior to the expiration of such rights,
options, or warrants, the Conversion Price shall be readjusted to the Conversion
Price which would otherwise have been in effect had the adjustment made upon the
issuance of such rights, options or warrants been made on the basis of delivery
of only the number of such rights, options and warrants which were actually
exercised.

      Section 5.09. Adjustments for Tax Purposes. The Company may, at its
option, make such reductions in the Conversion Price, in addition to those
required by Section 5.06 above, as the Board of Directors deems advisable to
avoid

<PAGE>

or diminish any income tax to holders of Common Stock resulting from any
dividend or distribution of stock (or rights to acquire stock) or from any event
treated as such for federal income tax purposes.

      Section 5.10. Adjustments by the Company. The Company from time to time
may, to the extent permitted by law, reduce the Conversion Price by any amount
for any period of at least 20 days, in which case the Company shall give at
least 15 days' notice of such reduction in accordance with Section 5.11, if the
Board of Directors has made a determination that such reduction would be in the
best interests of the Company, which determination shall be conclusive.

      Section 5.11. Notice of Adjustment. Whenever the Conversion Price is
adjusted, the Company shall promptly mail to Noteholders at the addresses
appearing on the Registrar's books a notice of the adjustment and file with the
Trustee an Officers' Certificate briefly stating the facts requiring the
adjustment and the manner of computing it.

      Section 5.12. Notice of Certain Transactions. In the event that:

            (a) the Company takes any action which would require an adjustment
      in the Conversion Price;

            (b) the Company takes any action that would require a supplemental
      indenture pursuant to Section 5.13; or

            (c) there is a dissolution or liquidation of the Company;

the Company shall mail to Noteholders at the addresses appearing on the
Registrar's books and the Trustee a notice stating the proposed record or
effective date, as the case may be. The Company shall mail the notice at least
15 days before such date; however, failure to mail such notice or any defect
therein shall not affect the validity of any transaction referred to in clause
(a), (b), (c), (d) or (e) of this Section 5.12.

      Section 5.13. Effect of Reclassifications, Consolidations, Mergers,
Continuances or Sales on Conversion Privilege. If any of the following shall
occur, namely: (i) any reclassification or change of outstanding shares of
Common Stock issuable upon conversion of Securities (other than a change in par
value, or from par value to no par value, or from no par value to par value, or
as a result of a subdivision or combination), (ii) any consolidation or merger
to which the Company is a party other than a merger in which the Company is the
continuing corporation and which does not result in any reclassification of, or
change (other than a change in name, or par value, or from par value to no par
value, or from no par value to par value or as a result of a subdivision or
combination) in, outstanding shares of Common Stock, (iii) any continuance in a
new jurisdiction which does not result in any reclassification of, or change
(other than a change in name, or par value, or from par value to no par value,
or from no par value to par value) in, outstanding shares of Common Stock, or
(iv) any sale or conveyance of all or substantially all of the property of the
Company (determined on a consolidated basis), then the Company, or such
successor or purchasing corporation, as the case may be, shall, as a condition
precedent to such reclassification, change, consolidation, merger, continuance,
sale or conveyance, execute and deliver to the Trustee a supplemental indenture
in form satisfactory to the Trustee providing that the holder of each Security
then outstanding shall have the right to convert such Security into the kind and
amount of shares of stock and other securities and property (including cash)
receivable upon such reclassification, change, consolidation, merger,
continuance, sale or conveyance by a holder of the number of shares of Common
Stock deliverable upon conversion of such Security immediately prior to such
reclassification, change, consolidation, merger, continuance, sale or
conveyance. Such supplemental indenture shall provide for adjustments of the
Conversion Price which shall be as nearly equivalent as may be practicable to
the adjustments of the Conversion Price provided for in this Article V. The
foregoing, however, shall not in any way affect the right a holder of a Security
may otherwise have, pursuant to clause (ii) of the last sentence of subsection
(c) of Section 5.06, to receive Rights upon conversion of a Security. If, in the
case of any such consolidation, merger, continuance, sale or conveyance, the
stock or other securities and property (including cash) receivable thereupon by
a holder of Common Stock includes shares of stock or other securities and
property of a corporation or other business entity other than the successor or
purchasing corporation, as the case may be, in such consolidation, merger,
continuance, sale or conveyance, then such supplemental indenture shall also be
executed by such other corporation or other business entity and shall contain
such additional provisions to protect the interests of the holders of the
Securities as the Board of Directors of the Company shall reasonably consider
necessary by reason of the foregoing. The provision of this Section 5.13 shall
similarly apply to successive consolidations, mergers, continuances, sales or
conveyances.

<PAGE>

      In the event the Company shall execute a supplemental indenture pursuant
to this Section 5.13, the Company shall promptly file with the Trustee (x) an
Officers' Certificate briefly stating the reasons therefor, the kind or amount
of shares of stock or securities or property (including cash) receivable by
holders of the Securities upon the conversion of their Securities after any such
reclassification, change, consolidation, merger, continuance, sale or conveyance
and any adjustment to be made with respect thereto (y) and Opinion of Counsel
stating that all conditions precedent relating to such transaction have been
complied with, and shall promptly mail notice thereof to all holders.

      Section 5.14. Trustee's Disclaimer. The Trustee has no duty to determine
when an adjustment under this Article V should be made, how it should be made or
what such adjustment should be or whether a supplemental indenture is required
by this Article V, but may accept as conclusive evidence of the correctness of
any such adjustment, and shall be protected in relying upon the Officers'
Certificate with respect thereto which the Company is obligated to file with the
Trustee pursuant to Section 5.11. The Trustee makes no representation as to the
validity or value of any securities or assets issued upon conversion of
Securities, and the Trustee shall not be responsible for the Company's failure
to comply with any provisions of this Article V.

      The Trustee shall not be under any responsibility to determine the
correctness of any provisions contained in any supplemental indenture executed
pursuant to Section 5.13, but may accept as conclusive evidence of the
correctness thereof, and shall be protected in relying upon, the Officers'
Certificate with respect thereto which the Company is obligated to file with the
Trustee pursuant to Section 5.13.

      Section 5.15. Cancellation of Converted Securities. All Securities
delivered for conversion shall be delivered to the Trustee to be canceled by or
at the direction of the Trustee, which shall dispose of the same as provided in
Section 2.11.

      Section 5.16. Restriction on Common Stock Issuable Upon Conversion. (a)
Shares of Common Stock to be issued upon conversion of Securities prior to the
effectiveness of a Shelf Registration Statement shall be physically delivered in
certificated form to the holders converting such Securities and the certificate
representing such shares of Common Stock shall bear the Restricted Common Stock
Legend unless removed in accordance with Section 5.16(c).

      (b) If (i) shares of Common Stock to be issued upon conversion of a
Security prior to the effectiveness of a Shelf Registration Statement are to be
registered in a name other than that of the holder of such Security or (ii)
shares of Common Stock represented by a certificate bearing the Restricted
Common Stock Legend are transferred subsequently by such holder, then, unless
the Shelf Registration Statement has become effective and such shares are being
transferred pursuant to the Shelf Registration Statement, the holder must
deliver to the transfer agent for the Common Stock a certificate in
substantially the form of Exhibit E as to compliance with the restrictions on
transfer applicable to such shares of Common Stock and neither the transfer
agent nor the registrar for the Common Stock shall be required to register any
transfer of such Common Stock not so accompanied by a properly completed
certificate.

      (c) Except in connection with a Shelf Registration Statement, if
certificates representing shares of Common Stock are issued upon the
registration of transfer, exchange or replacement of any other certificate
representing shares of Common Stock bearing the Restricted Common Stock Legend,
or if a request is made to remove such Restricted Common Stock Legend from
certificates representing shares of Common Stock, the certificates so issued
shall bear the Restricted Common Stock Legend, or the Restricted Common Stock
Legend shall not be removed, as the case may be, unless there is delivered to
the Company such satisfactory evidence, which, in the case of a transfer made
pursuant to Rule 144 under the Securities Act, may include an opinion of counsel
licensed to practice law in the State of New York, as may be reasonably required
by the Company, that neither the legend nor the restrictions on transfer set
forth therein are required to ensure that transfers thereof comply with the
provisions of Rule 144A, Rule 144 or Regulation S under the Securities Act or
that such shares of Common Stock are securities that are not "restricted" within
the meaning of Rule 144 under the Securities Act. Upon provision to the Company
of such reasonably satisfactory evidence, the Company shall cause the transfer
agent for the Common Stock to countersign and deliver certificates representing
shares of Common Stock that do not bear the legend.

<PAGE>

                                   ARTICLE VI

                                  SUBORDINATION

      Section 6.01. Agreement to Subordinate. The Company, for itself and its
successors, and each Noteholder, by his acceptance of Securities, agree that the
payment of the principal of and premium, if any, interest, Liquidated Damages,
if any, and any other amounts due on the Securities is subordinated in right of
payment, to the extent and in the manner stated in this Article VI, to the prior
payment in full of all existing and future Senior Debt. Anything herein to the
contrary notwithstanding, the provisions of this Article VI shall not be
applicable with respect to any Liquidated Damages payable in respect of shares
of Common Stock issued on conversion of Securities.

      Section 6.02. No Payment on Securities if Senior Debt in Default. Anything
in this Indenture to the contrary notwithstanding, no payment on account of
principal of or premium, if any, interest or Liquidated Damages, if any on or
other amounts due on the Securities (including the making of a deposit pursuant
to Section 3.05 or 3.08(f)), and no redemption, purchase, or other acquisition
of the Securities, shall be made by or on behalf of the Company unless (i) full
payment of all amounts then due for principal of and interest on, and of all
other amounts then due on, all Senior Debt has been made or duly provided for
pursuant to the terms of the instruments governing such Senior Debt and (ii) at
the time for, and immediately after giving effect to, such payment, redemption,
purchase or other acquisition, there shall not exist under any Senior Debt, or
any agreement pursuant to which any Senior Debt is issued, any default which
shall not have been cured or waived and which default shall have resulted in the
full amount of such Senior Debt being declared due and payable. In addition, if
the Trustee shall receive written notice from the holders of Designated Senior
Debt or their Representative (a "Payment Blockage Notice") that there has
occurred and is continuing under such Designated Senior Debt, or any agreement
pursuant to which such Designated Senior Debt is issued, any default, which
default shall not have been cured or waived, giving the holders of such
Designated Senior Debt the right to declare such Designated Senior Debt
immediately due and payable, then, anything in this Indenture to the contrary
notwithstanding, no payment on account of the principal of or premium, if any,
interest or Liquidated Damages, if any, on or any other amounts due on the
Securities (including, without limitation, the making of a deposit pursuant to
Section 3.05 or 3.08(f)), and no redemption, purchase or other acquisition of
the Securities, shall be made by or on behalf of the Company during the period
(the "Payment Blockage Period") commencing on the date of receipt of the Payment
Blockage Notice and ending (unless earlier terminated by notice given to the
Trustee by the holders or the Representative of the holders of such Designated
Senior Debt) on the earlier of (a) the date on which such default shall have
been cured or waived or (b) 180 days from the receipt of the Payment Blockage
Notice. Notwithstanding the provisions described in the immediately preceding
sentence (but subject to the provisions contained in Section 6.01 and the first
sentence of this Section 6.02), unless the holders of such Designated Senior
Debt or the Representative of such holders shall have accelerated the maturity
of such Designated Senior Debt, the Company may resume payments on the
Securities after the end of such Payment Blockage Period. Not more than one
Payment Blockage Notice may be given in any consecutive 365-day period,
irrespective of the number of defaults with respect to Senior Debt during such
period.

      In the event that, notwithstanding the provisions of this Section 6.02,
payments are made by or on behalf of the Company in contravention of the
provisions of this Section 6.02, such payments shall be held by the Trustee, any
Paying Agent or the holders, as applicable, in trust for the benefit of, and
shall be paid over to and delivered to, the Representative of the holders of
Senior Debt or the trustee under the indenture or other agreement (if any),
pursuant to which any instruments evidencing any Senior Debt may have been
issued for application to the payment of all Senior Debt ratably according to
the aggregate amounts remaining unpaid to the extent necessary to pay all Senior
Debt in full in accordance with the terms of such Senior Debt, after giving
effect to any concurrent payment or distribution to or for the holders of Senior
Debt.

      The Company shall give prompt written notice to the Trustee and any Paying
Agent of any default or event of default under any Senior Debt or under any
agreement pursuant to which any Senior Debt may have been issued.

      Section 6.03. Distribution on Acceleration of Securities; Dissolution and
Reorganization; Subrogation of Securities.

      (a) If the Securities are declared due and payable because of the
occurrence of an Event of Default, the Company shall give prompt written notice
to the holders of all Senior Debt or to the trustee(s) for such Senior Debt of
such acceleration. The Company may not pay the principal of, or premium, if any,
interest or Liquidated Damages, if any, on, or any other amounts due on, the
Securities until five Business Days after such holders or trustee(s) of Senior
Debt receive such notice and, thereafter, the Company may pay the principal of,
and premium, if any, interest and Liquidated Damages, if any, on, and any other
amounts due on, the Securities only if the provisions of this Article VI permit
such payment.

      (b) Upon (i) any acceleration of the principal amount due on the
Securities because of an Event of Default or (ii) any direct or indirect
distribution of assets of the Company upon any dissolution, winding up,
liquidation or reorganization of the Company (whether in bankruptcy, insolvency
or receivership proceedings or upon an assignment for the benefit of creditors
or any other dissolution, winding up, liquidation or reorganization of the
Company):

<PAGE>

            (1) the holders of all Senior Debt shall first be entitled to
      receive payment in full of the principal thereof, the interest thereon and
      any other amounts due thereon before the holders are entitled to receive
      payment on account of the principal of , or premium, if any, interest or
      Liquidated Damages, if any, on, or any other amounts due on, the
      Securities (other than payments of Junior Securities);

            (2) any payment or distribution of assets of the Company of any kind
      or character, whether in cash, property or securities (other than Junior
      Securities), to which the holders or the Trustee would be entitled (other
      than in respect of amounts payable to the Trustee pursuant to Section
      9.07) except for the provisions of this Article, shall be paid by the
      liquidating trustee or agent or other Person making such a payment or
      distribution, directly to the holders of Senior Debt (or their
      representative(s) or trustee(s) acting on their behalf), ratably according
      to the aggregate amounts remaining unpaid on account of the principal of
      and interest on and other amounts due on the Senior Debt held or
      represented by each, to the extent necessary to make payment in full of
      all Senior Debt remaining unpaid, after giving effect to any concurrent
      payment or distribution to the holders of such Senior Debt; and

            (3) in the event that, notwithstanding the foregoing, any payment or
      distribution of assets of the Company of any kind or character, whether in
      cash, property or securities (other than Junior Securities), shall be
      received by the Trustee (other than in respect of amounts payable to the
      Trustee pursuant to Section 9.07) or the holders before all Senior Debt is
      paid in full, such payment or distribution shall be held in trust for the
      benefit of, and be paid over to upon request by a holder of Senior Debt,
      to the holders of the Senior Debt remaining unpaid or their
      representatives or trustee(s) acting on their behalf, ratably as
      aforesaid, for application to the payment of such Senior Debt until all
      such Senior Debt shall have been paid in full, after giving effect to any
      concurrent payment or distribution to the holders of such Senior Debt.

      Subject to the payment in full of all Senior Debt, the holders shall be
subrogated to the rights of the holders of Senior Debt to receive payments and
distributions of cash, property or securities of the Company applicable to the
Senior Debt until the principal of, and premium, if any, interest and Liquidated
Damages, if any on, and all other amounts payable in respect of the Securities
shall be paid in full and, for purposes of such subrogation, no such payments or
distributions to the holders of Senior Debt of cash, property or securities
which otherwise would have been payable or distributable to holders shall, as
between the Company, its creditors other than the holders of Senior Debt, and
the holders, be deemed to be a payment by the Company to or on account of the
Senior Debt, it being understood that the provisions of this Article are and are
intended solely for the purpose of defining the relative rights of the holders,
on the one hand, and the holders of Senior Debt, on the other hand.

      Nothing contained in this Article or elsewhere in this Indenture or in the
Securities is intended to or shall (i) impair, as between the Company and its
creditors other than the holders of Senior Debt, the obligation of the Company,
which is absolute and unconditional, to pay to the holders the principal of,
premium, if any, on, and interest and Liquidated Damages, if any, on, the
Securities as and when the same shall become due and payable in accordance with
the terms of

<PAGE>

the Securities, (ii) affect the relative rights of the holders and creditors of
the Company other than holders of Senior Debt or, as between the Company and the
Trustee, the obligations of the Company to the Trustee, or (iii) prevent the
Trustee or the holders from exercising all remedies otherwise permitted by
applicable law upon default under this Indenture, subject to the rights, if any,
under this Article of the holders of Senior Debt in respect of cash, property
and securities of the Company received upon the exercise of any such remedy.

      Upon distribution of assets of the Company referred to in this Article,
the Trustee, subject to the provisions of Section 9.01 hereof, and the holders
shall be entitled to rely upon a certificate of the liquidating trustee or agent
or other Person making any distribution to the Trustee or to the holders for the
purpose of ascertaining the Persons entitled to participate in such
distribution, the holders of the Senior Debt and other indebtedness of the
Company, the amount thereof or payable thereon, the amount or amounts paid or
distributed thereon and all other facts pertinent thereto or to this Article.
The Trustee, however, shall not be deemed to owe any fiduciary duty to the
holders of Senior Debt. Nothing contained in this Article or elsewhere in this
Indenture, or in any of the Securities, shall prevent the good faith application
by the Trustee of any moneys which were deposited with it hereunder, prior to
its receipt of written notice of facts which would prohibit such application,
for the purpose of the payment of or on account of the principal of, premium, if
any, on, interest or Liquidated Damages, if any, on, the Securities unless,
prior to the date on which such application is made by the Trustee, the Trustee
shall be charged with actual notice under Section 6.03(d) hereof of the facts
which would prohibit the making of such application.

      (c) The provisions of this Article shall not be applicable to any cash,
properties or securities received by the Trustee or by any holder when received
as a holder of Senior Debt and nothing in Section 9.11 hereof or elsewhere in
this Indenture shall deprive the Trustee or such holder of any of its rights as
such holder.

      (d) The Company shall give prompt written notice to the Trustee of any
fact known to the Company which would prohibit the making of any payment of
money to or by the Trustee in respect of the Securities pursuant to the
provisions of this Article. The Trustee, subject to the provisions of Section
9.01 hereof, shall be entitled to assume that no such fact exists unless the
Company or any holder of Senior Debt or any trustee therefor has given actual
notice thereof to the Trustee. Notwithstanding the provisions of this Article or
any other provisions of this Indenture, the Trustee shall not be charged with
knowledge of the existence of any fact which would prohibit the making of any
payment of moneys to or by the Trustee in respect of the Securities pursuant to
the provisions in this Article, unless, and until three Business Days after, the
Trustee shall have received written notice thereof from the Company or any
holder or holders of Senior Debt or from any trustee or Representative therefor;
and, prior to the receipt of any such written notice, the Trustee, subject to
the provisions of Section 9.01 hereof, shall be entitled in all respects
conclusively to assume that no such facts exist; provided that if on a date not
less than three Business Days immediately preceding the date upon which, by the
terms hereof, any such moneys may become payable for any purpose (including,
without limitation, to pay the principal of, premium, if any, on, interest or
Liquidated Damages, if any, on, any Security), the Trustee shall not have
received with respect to such moneys the notice provided for in this Section
6.03(d), then anything herein contained to the contrary notwithstanding, the
Trustee shall have full power and authority to receive such moneys and to apply
the same to the purpose for which they were received, and shall not be affected
by any notice to the contrary which may be received by it on or after such prior
date.

      The Trustee shall be entitled to rely conclusively on the delivery to it
of a written notice by a Person representing himself to be a holder of Senior
Debt (or a trustee or Representative on behalf of such holder) to establish that
such notice has been given by a holder of Senior Debt (or a trustee or
Representative on behalf of any such holder or holders). In the event that the
Trustee determines in good faith that further evidence is required with respect
to the right of any Person as a holder of Senior Debt to participate in any
payment or distribution pursuant to this Article, the Trustee may request such
Person to furnish evidence to the reasonable satisfaction of the Trustee as to
the amount of Senior Debt held by such Person, the extent to which such person
is entitled to participate in such payment or distribution and any other facts
pertinent to the rights of such Person under this Article, and, if such evidence
is not furnished, the Trustee may defer any payment to such Person pending
judicial determination as to the right of such Person to receive such payment;
nor shall the Trustee be charged with knowledge or the curing or waiving of any
default of the character specified in Section 6.02 hereof or that any event or
any condition preventing any payment in respect of the Securities shall have
ceased to exist, unless and until the Trustee shall have received written notice
to such effect.

      (e) The provisions of this Section 6.03 applicable to the Trustee shall
(unless the context requires otherwise) also apply to any Paying Agent for the
Company.

<PAGE>

      Section 6.04. Reliance by Senior Debt on Subordination Provisions. Each
holder of any Security by his acceptance thereof acknowledges and agrees that
the foregoing subordination provisions are, and are intended to be, an
inducement and a consideration for each holder of any Senior Debt, whether such
Senior Debt was created or acquired before or after the issuance of the
Securities, to acquire and continue to hold, or to continue to hold, such Senior
Debt, and such holder of Senior Debt shall be deemed conclusively to have relied
on such subordination provisions in acquiring and continuing to hold, or in
continuing to hold, such Senior Debt. Notice of any default in the payment of
any Senior Debt, except as expressly stated in this Article, and notice of
acceptance of the provisions hereof are, to the extent permitted by law, hereby
expressly waived. Except as otherwise expressly provided herein, no waiver,
forbearance or release by any holder of Senior Debt under such Senior Debt or
under this Article shall constitute a release of any of the obligations or
liabilities of the Trustee or holders of the Securities provided in this
Article.

      Section 6.05. No Waiver of Subordination Provisions. Except as otherwise
expressly provided herein, no right of any present or future holder of any
Senior Debt to enforce subordination as herein provided shall at any time in any
way be prejudiced or impaired by any act or failure to act on the part of the
Company or by any act or failure to act, in good faith, by any such holder, or
by any noncompliance by the Company with the terms, provisions and covenants of
this Indenture, regardless of any knowledge thereof any such holder may have or
be otherwise charged with.

      Without in any way limiting the generality of the foregoing paragraph, the
holders of Senior Debt may, at any time and from time to time, without the
consent of, or notice to, the Trustee or the holders of the Securities, without
incurring responsibility to the holders of the Securities and without impairing
or releasing the subordination provided in this Article VI or the obligations
hereunder of the holders of the Securities to the holders of Senior Debt, do any
one or more of the following: (i) change the manner, place or terms of payment
of, or renew or alter, Senior Debt, or otherwise amend or supplement in any
manner Senior Debt or any instrument evidencing the same or any agreement under
which Senior Debt is outstanding; (ii) sell, exchange, release or otherwise
dispose of any property pledged, mortgaged or otherwise securing Senior Debt;
(iii) release any person liable in any manner for the collection of Senior Debt;
and (iv) exercise or refrain from exercising any rights against the Company or
any other Person.

      Section 6.06. Trustee's Relation to Senior Debt. The Trustee in its
individual capacity shall be entitled to all the rights set forth in this
Article in respect of any Senior Debt at any time held by it, to the same extent
as any holder of Senior Debt, and nothing in Section 9.11 hereof or elsewhere in
this Indenture shall deprive the Trustee of any of its rights as such holder.

      With respect to the holders of Senior Debt, the Trustee undertakes to
perform or to observe only such of its covenants and obligations, as are
specifically set forth in this Article, and no implied covenants or obligations
with respect to the holders of Senior Debt shall be read into this Indenture
against the Trustee. The Trustee shall not owe any fiduciary duty to the holders
of Senior Debt but shall have only such obligations to such holders as are
expressly set forth in this Article.

      Each holder of a Security by his acceptance thereof authorizes and directs
the Trustee on his behalf to take such action as may be necessary or appropriate
to effectuate the subordination provided in this Article and appoints the
Trustee his attorney-in-fact for any and all such purposes, including, in the
event of any dissolution, winding up or liquidation or reorganization under any
applicable bankruptcy law of the Company (whether in bankruptcy, insolvency or
receivership proceedings or otherwise), the timely filing of a claim for the
unpaid balance of such holder's Securities in the form required in such
proceedings and the causing of such claim to be approved. If the Trustee does
not file a claim or proof of debt in the form required in such proceedings prior
to 30 days before the expiration of the time to file such claims or proofs, then
any holder or holders of Senior Debt or their Representative or Representatives
shall have the right to demand, sue for, collect, receive and receipt for the
payments and distributions in respect of the Securities which are required to be
paid or delivered to the holders of Senior Debt as provided in this Article and
to file and prove all claims therefor and to take all such other action in the
name of the holders or otherwise, as such holders of Senior Debt or
Representative thereof may determine to be necessary or appropriate for the
enforcement of the provisions of this Article.

      Section 6.07. Other Provisions Subject Hereto. Except as expressly stated
in this Article, notwithstanding anything contained in this Indenture to the
contrary, all the provisions of this Indenture and the Securities are subject to
the provisions of this Article VI. However, nothing in this Article shall apply
to or adversely affect the claims of, or payment to, the Trustee pursuant to
Section 9.07 or the right of any holder of Common Stock issued upon conversion
of Securities to receive Liquidated Damages, if any, in respect of such shares
of Common Stock. Notwithstanding the foregoing, the

<PAGE>

failure to make a payment on account of principal of, premium, if any, on, or
interest or Liquidated Damages, if any, on, the Securities by reason of any
provision of this Article VI shall not be construed as preventing the occurrence
of an Event of Default under Section 8.01.

                                   ARTICLE VII

                                   SUCCESSORS

      Section 7.01. Merger, Consolidation or Sale of Assets. The Company will
not consolidate or merge with or into any person (whether or not the Company is
the surviving corporation), continue in a new jurisdiction or sell, assign,
transfer, lease, convey or otherwise dispose of all or substantially all of its
properties or assets unless:

            (a) the Company is the surviving corporation (in the case of a
      merger) or the Person formed by or surviving any such consolidation or
      merger (if other than the Company) or the Person which acquires by sale,
      assignment, transfer, lease, conveyance or other disposition the
      properties and assets of the Company is a corporation organized and
      existing under the laws of the United States, any state thereof or the
      District of Columbia; provided that in the event of the continuation of
      the Company in the new jurisdiction, the Company must remain a corporation
      organized and existing under the laws of the United States, any state
      thereof or the District of Columbia;

            (b) the corporation formed by or surviving any such consolidation or
      merger (if other than the Company) or the corporation to which such sale,
      assignment, transfer, lease, conveyance or other disposition will have
      been made assumes all the obligations of the Company, pursuant to a
      supplemental indenture in a form reasonably satisfactory to the Trustee,
      under the Securities, the Registration Agreement and the Indenture;

            (c) such sale, assignment, transfer, lease, conveyance or other
      disposition of all or substantially all of the Company's properties or
      assets shall be as an entirety or virtually as an entirety to one
      corporation and such corporation shall have assumed all the obligations of
      the Company, pursuant to a supplemental indenture in form reasonably
      satisfactory to the Trustee, under the Securities, the Registration
      Agreement and the Indenture;

            (d) immediately after such transaction no Default or Event of
      Default exists; and

            (e) the Company or such corporation shall have delivered to the
      Trustee an Officers' Certificate and an Opinion of Counsel, each stating
      that such transaction and the supplemental indenture, if required, comply
      with the Indenture and that all conditions precedent in the Indenture
      relating to such transaction have been satisfied.

      Section 7.02. Successor Corporation Substituted. Upon any consolidation or
merger or any sale, assignment, transfer, lease, conveyance or other disposition
of all or substantially all of the assets of the Company in accordance with
Section 7.01 hereof, the successor corporation (if other than the Company)
formed by such consolidation or into or with

<PAGE>

which the Company is merged or the corporation to which such sale, assignment,
transfer, lease, conveyance or other disposition is made shall succeed to, and
be substituted for and may exercise every right and power of, the Company under
this Indenture with the same effect as if such successor Person has been named
as the Company herein; provided, however, that the predecessor Company in the
case of a sale, assignment, transfer, lease, conveyance or other disposition
shall not be released from the obligation to pay the principal of, premium, if
any, on and interest and Liquidated Damages, if any, on the Securities.

                                  ARTICLE VIII

                              DEFAULTS AND REMEDIES

      Section 8.01. Events of Default. An "Event of Default" occurs if:

            (a) the Company defaults in the payment of any interest or
      Liquidated Damages on any Security when the same becomes due and payable
      and the default continues for a period of 30 days; or

            (b) the Company defaults in the payment of any principal of or
      premium, if any, on any Security when the same becomes due and payable,
      whether at maturity, upon redemption or otherwise (including, without
      limitation, failure by the Company to purchase Securities tendered for
      purchase pursuant to a Designated Event Offer as and when required
      pursuant to Section 3.08 or Section 4.07 hereof); or

            (c) the Company fails to observe or perform any covenant or
      agreement contained in Section 3.08 or Section 4.07 hereof; or

            (d) the Company fails to observe or perform any other covenant or
      agreement contained in this Indenture or the Securities required by it to
      be performed and the failure continues for a period of 60 days after the
      receipt of written notice by the Company from the Trustee or by the
      Company and the Trustee from the holders of at least 25% in aggregate
      principal amount of the then outstanding Securities stating that such
      notice is a "Notice of Default"; or

            (e) a default under any mortgage, indenture or instrument under
      which there may be issued or by which there may be secured or evidenced
      any Indebtedness for money borrowed by the Company or any Material
      Subsidiary of the Company (or the payment of which is Guaranteed by the
      Company or any of its Material Subsidiaries), whether such Indebtedness or
      Guarantee exists on the date of this Indenture or is created thereafter,
      which default (i) is caused by a failure to pay when due any principal of
      or interest on such Indebtedness within the grace period provided for in
      such Indebtedness (which failure continues beyond any applicable grace
      period) (a "Payment Default") or (ii) results in the acceleration of such
      Indebtedness prior to its express maturity (without such acceleration
      being rescinded or annulled) and, in each case, the principal amount of
      such Indebtedness, together with the principal

<PAGE>

      amount of any other such Indebtedness under which there is a Payment
      Default or the maturity of which has been so accelerated, aggregates
      $15,000,000 or more and which Payment Default is not cured or which
      acceleration is not annulled within 30 days after written receipt by the
      Company from the Trustee or by the Company and the Trustee from any holder
      of Securities stating that such notice is a "Notice of Default"; or

            (f) a final, non-appealable judgment or final non-appealable
      judgments (other than any judgment as to which a reputable insurance
      company has accepted full liability) for the payment of money are entered
      by a court or courts of competent jurisdiction against the Company or any
      Material Subsidiaries of the Company and remain unstayed, unbonded or
      undischarged for a period (during which execution shall not be effectively
      stayed) of 60 days, provided that the aggregate of all such judgments
      exceeds $15,000,000; or

            (g) the Company or any Material Subsidiary pursuant to or within the
      meaning of any Bankruptcy Law:

                  (A) commences a voluntary case or proceeding; or

                  (B) consents to the entry of an order for relief against the
            Company or any Material Subsidiary in an involuntary case or
            proceeding; or

                  (C) consents to the appointment of a Custodian of the Company
            or any Material Subsidiary or for all or any substantial part of its
            property; or

                  (D) makes a general assignment for the benefit of its
            creditors; or

                  (E) take corporate or similar action in respect of any of the
            foregoing; or

            (h) a court of competent jurisdiction enters an order or decree
      under any Bankruptcy Law that:

                  (A) is for relief against the Company or any Material
            Subsidiary in an involuntary case or proceeding; or

                  (B) appoints a Custodian of the Company or any Material
            Subsidiary or for all or any substantial part of the property of the
            Company or any Material Subsidiary; or

                  (C) orders the liquidation of the Company or any Material
            Subsidiary;

      and in each case referred to in this paragraph (h) the order

<PAGE>

      or decree remains unstayed and in effect for 60 days.

      The term "Bankruptcy Law" means Title 11, U.S. Code or any similar
federal, state or foreign bankruptcy, insolvency or similar law. The term
"Custodian" means any custodian, receiver, trustee, assignee, sequestor,
liquidator or similar official under any Bankruptcy Law.

      Section 8.02. Acceleration. If an Event of Default (other than an Event of
Default specified in clauses (g) and (h) of Section 8.01 hereof) occurs and is
continuing, the Trustee by notice to the Company, or the Noteholders of at least
25% in principal amount of the then outstanding Securities by notice to the
Company and the Trustee, may declare all the Securities to be due and payable.
Upon such declaration, the principal of, premium, if any, on and accrued and
unpaid interest and Liquidated Damages, if applicable, on the Securities shall
be due and payable immediately. If an Event of Default specified in clause (g)
or (h) of Section 8.01 hereof occurs, the principal of, premium, if any, on and
accrued and unpaid interest and Liquidated Damages, if any, on the Securities
shall ipso facto become and be immediately due and payable without any
declaration or other act on the part of the Trustee or any Noteholder. The
Noteholders of a majority in aggregate principal amount of the then outstanding
Securities by notice to the Trustee may rescind an acceleration and its
consequences if the rescission would not conflict with any judgment or decree,
if all amounts payable to the Trustee pursuant to Section 9.07 hereof have been
paid and if all existing Events of Default have been cured or waived as provided
for herein except nonpayment of principal, premium, if any, interest or
Liquidated Damages, if any, that has become due solely because of the
acceleration.

      Section 8.03. Other Remedies. If an Event of Default occurs and is
continuing, the Trustee may pursue any available remedy to collect the payment
of principal of, premium, if any, on or interest and Liquidated Damages, if any,
on, the Securities or to enforce the performance of any provision of the
Securities or this Indenture.

      The Trustee may maintain a proceeding even if it does not possess any of
the Securities or does not produce any of them in the proceeding. A delay or
omission by the Trustee or any Noteholder in exercising any right or remedy
accruing upon an Event of Default shall not impair the right or remedy or
constitute a waiver of or acquiescence in the Event of Default. All remedies are
cumulative to the extent permitted by law.

      Section 8.04. Waiver of Past Defaults. Subject to Section 8.07 hereof, the
Noteholders of a majority in aggregate principal amount of the then outstanding
Securities by notice to the Trustee may waive an existing Default or Event of
Default and its consequences except a continuing Default or Event of Default in
the payment of the Designated Event Payment or the principal of, premium, if
any, on, or interest or Liquidated Damages, if any, on, any Security or in
respect of a covenant in or other provision of this Indenture or the Securities
which cannot be amended or waived without the consent of each Noteholder
affected. When a Default or Event of Default is waived, it is cured and ceases;
but no such waiver shall extend to any subsequent or other Default or Event of
Default or impair any right consequent thereon.

      Section 8.05. Control by Majority. The Noteholders of a majority in
principal amount of the then outstanding Securities may direct the time, method
and place of conducting any proceeding for any remedy available to the Trustee
or exercising any trust or power conferred on it. However, the Trustee may
refuse to follow any direction that conflicts with law or this Indenture, that
may be unduly prejudicial to the rights of other Noteholders, or that may
involve the Trustee in personal liability; provided that the Trustee may take
any other action deemed by the Trustee that is not inconsistent with such
direction. Prior to taking any action hereunder, the Trustee shall be entitled
to indemnification satisfactory to it in its sole discretion against all losses
and expenses caused by taking or not taking such action.

      Section 8.06. Limitation on Suits. A Noteholder may pursue a remedy with
respect to this Indenture or the Securities only if:

            (a) the Noteholder gives to the Trustee a written notice of a
      continuing Event of Default;

            (b) the Noteholders of at least 25% in principal amount of the then
      outstanding Securities make a written request to the Trustee to pursue the
      remedy;

            (c) such Noteholder or Noteholders offer and, if requested, provide
      to the Trustee indemnity satisfactory

<PAGE>

      to the Trustee against any loss, liability or expense;

            (d) the Trustee does not comply with the request within 60 days
      after receipt of the request and the offer of indemnity; and

            (e) during such 60-day period the Noteholders of a majority in
      principal amount of the then outstanding Securities do not give the
      Trustee a direction inconsistent with the request.

      A Noteholder may not use this Indenture to prejudice the rights of another
Noteholder or to obtain a preference or priority over another Noteholder.

      Section 8.07. Rights of Noteholders to Receive Payment. Notwithstanding
any other provision of this Indenture, the right of any Noteholder of a Security
to receive payment of principal of, premium, if any on, and interest and
Liquidated Damages, if any, on the Security, on or after the respective due
dates expressed in the Security and this Indenture, or to bring suit for the
enforcement of any such payment on or after such respective dates, shall not be
impaired or affected without the consent of the Noteholder made pursuant to this
Section.

      Section 8.08. Collection Suit by Trustee. If an Event of Default specified
in Section 8.01(a) or (b) occurs and is continuing, the Trustee may recover
judgment in its own name and as trustee of an express trust against the Company
for the whole amount of principal, premium, if any, interest and Liquidated
Damages, if any, remaining unpaid on the Securities and, to the extent permitted
by law, interest on overdue principal, premium, if any, interest and Liquidated
Damages, if any and such further amount as shall be sufficient to cover the
costs and, to the extent lawful, expenses of collection, including the
reasonable compensation, expenses, disbursements and advances of the Trustee,
its agents and counsel, and any other amounts due under Section 9.07 hereof.

      Section 8.09. Trustee May File Proofs of Claim. The Trustee shall be
entitled and empowered, without regard to whether the Trustee or any holder
shall have made any demand or performed any other act pursuant to the provisions
of this Article and without regard to whether the principal of the Securities
shall then be due and payable as therein expressed or by declaration or
otherwise, by intervention in any proceedings relative to the Company or any
other obligor upon the Securities, or to the creditors or property or assets of
the Company or any such other obligor or otherwise, to take any and all actions
authorized under the TIA in order to have claims of the holders and the Trustee
allowed in any such proceeding. In particular, the Trustee shall be entitled and
empowered in such instances:

            (a) to file and prove a claim or claims for the whole amount of
      principal and premium, if any, interest, Liquidated Damages, if any, and
      any other amounts owing and unpaid in respect of the Securities, and to
      file such other papers or documents as may be necessary or advisable in
      order to have the claims of the Trustee (including all amounts owing to
      the Trustee and each predecessor Trustee pursuant to Section 9.07 hereof)
      and of the holders allowed in any judicial proceedings relating to the
      Company or other obligor upon the Securities property of the Company or
      any such other obligor,

            (b) unless prohibited by applicable law and regulations, to vote on
      behalf of the holders of the Securities in any election of a trustee or a
      standby trustee in arrangement, reorganization, liquidation or other
      bankruptcy or insolvency proceedings or Person performing similar
      functions in comparable proceedings, and

            (c) to collect and receive any moneys or other property or assets
      payable or deliverable on any such

<PAGE>

      claims, and to distribute all amounts received with respect to the claims
      of the holders and of the Trustee on their behalf; and any trustee,
      receiver, or liquidator, custodian or other similar official is hereby
      authorized by each of the holders to make payments to the Trustee, and, in
      the event that the Trustee shall consent to the making of payments
      directly to the holders, to pay to the Trustee such amounts as shall be
      sufficient to cover all amounts owing to the Trustee and each predecessor
      Trustee pursuant to Section 9.07 hereof.

      Nothing herein contained shall be deemed to authorize the Trustee to
authorize or consent to or vote for or accept or adopt on behalf of any holder
any plan of reorganization, arrangement, adjustment or composition affecting the
Securities or the rights of any holder thereof, or to authorize the Trustee to
vote in respect of the claim of any holder of any such proceeding except, as
aforesaid, to vote for the election of a trustee in bankruptcy or similar
person.

      In any proceedings brought by the Trustee (and also any proceedings
involving the interpretation of any provision of this Indenture to which the
Trustee shall be a party), the Trustee shall be held to represent all the
holders of the Securities, and it shall not be necessary to make any holders of
the Securities parties to any such proceedings.

      Section 8.10. Priorities. If the Trustee collects any money pursuant to
this Article, it shall pay out the money in the following order:

            First: to the Trustee for amounts due under Section 9.07 hereof,
      including payment of all compensation, expense and liabilities incurred,
      and all advances made, by the Trustee and the costs and expenses of
      collection;

            Second: to the holders of Senior Debt to the extent required by
      Article VI;

            Third: to the Noteholders, for amounts due and unpaid on the
      Securities for principal, premium, if any, interest and Liquidated
      Damages, if any, ratably, without preference or priority of any kind,
      according to the amounts due and payable on the Securities for principal,
      premium, if any, interest and Liquidated Damages, if any; and

            Fourth: to the Company or to such other party as a court of
      competent jurisdiction shall direct.

      Except as otherwise provided in Section 2.12 hereof, the Trustee may fix a
record date and payment date for any payment to Noteholders made pursuant to
this Section 8.10. At least 15 days before such record date, the Company shall
mail to each holder and the Trustee a notice that states the record date, the
payment date and amount to be paid. The Trustee may mail such notice in the name
and at the expense of the Company.

      Section 8.11. Undertaking for Costs. In any suit for the enforcement of
any right or remedy under this Indenture or in any suit against the Trustee for
any action taken or omitted by it as a Trustee, a court in its discretion may
require the filing by any party litigant in the suit of an undertaking to pay
the costs of the suit, and the court in its discretion may assess reasonable
costs, including reasonable attorneys' fees and expenses, against any party
litigant in the suit, having due regard to the merits and good faith of the
claims or defenses made by the party litigant. This Section does not apply to a
suit by the Trustee, a suit by a holder pursuant to Section 8.07 hereof, or a
suit by Noteholders of more than 10% in principal amount of the then outstanding
Securities.

      Section 8.12. Restoration of Rights and Remedies. If the Trustee or any
holder of Securities has instituted any proceeding to enforce any right or
remedy under this Indenture and such proceeding has been discontinued or
abandoned for any reason, or has been determined adversely to the Trustee or to
such holder, then and in every such case the Company,

<PAGE>

the Trustee and the holders shall, subject to any determination in such
proceeding, be restored severally and respectively to their former positions
hereunder, and thereafter all rights and remedies of the Trustee and the holders
shall continue as though no such proceeding has been instituted.

      Section 8.13. Rights and Remedies Cumulative. Except as otherwise provided
in Section 2.07 hereof, no right or remedy conferred herein, upon or reserved to
the Trustee or to the holders is intended to be exclusive of any other right or
remedy, and every right and remedy shall, to the extent permitted by law, be
cumulative and in addition to every other right and remedy given hereunder or
now or hereafter existing at law or in equity or otherwise. The assertion or
employment of any right or remedy hereunder, or otherwise, shall not prevent (to
the extent permitted by law) the concurrent assertion or employment of any other
appropriate right or remedy.

      Section 8.14. Delay or Omission Not Waiver. No delay or omission of the
Trustee or of any holder of any Security to exercise any right or remedy
accruing upon any Event of Default shall (to the extent permitted by law) impair
any such right or remedy or constitute a waiver of any such Event of Default or
an acquiescence therein. Every right and remedy given by this Article VIII or by
law to the Trustee or to the holders may (to the extent permitted by law) be
exercised from time to time and as often as may be deemed expedient, by the
Trustee or by the holders, as the case may be.

                                   ARTICLE IX

                                     TRUSTEE

      Section 9.01. Duties of Trustee.

      (a) If an Event of Default has occurred and is continuing, the Trustee
shall exercise such of the rights and powers vested in it by this Indenture, and
use the same degree of care and skill in their exercise, as a prudent Person
would exercise or use under the circumstances in the conduct of such Person's
own affairs.

      (b) Except during the continuance of an Event of Default: (i) the Trustee
need perform only those duties that are specifically set forth in this Indenture
and no others; and (ii) in the absence of bad faith on its part, the Trustee may
conclusively rely, as to the truth of the statements and the correctness of the
opinions expressed therein, upon certificates or opinions furnished to the
Trustee and, if required by the terms hereof, conforming to the requirements of
this Indenture. However, the Trustee shall examine the certificates and opinions
to determine whether or not they conform to the applicable requirements, if any,
of this Indenture. During the continuance of an Event of Default, the Trustee
may consult with its legal counsel and rely upon advice from such counsel with
respect to legal matters.

      (c) The Trustee may not be relieved from liability for its own negligent
action, its own negligent failure to act, or its own willful misconduct, except
that: (i) this paragraph does not limit the effect of paragraph (b) of this
Section 9.01; (ii) the Trustee shall not be liable for any error of judgment
made in good faith by a Trust Officer, unless it is proved that the Trustee was
negligent in ascertaining the pertinent facts and (iii) the Trustee shall not be
liable with respect to any action it takes or omits to take in good faith in
accordance with a direction received by it pursuant to Section 8.05 hereof.

      (d) Every provision of this Indenture that in any way relates to the
Trustee is subject to paragraphs (a), (b) and (c) of this Section 9.01.

      (e) No provision of this Indenture shall require the Trustee to expend or
risk its own funds or incur any liability. The Trustee shall be under no
obligation to exercise any of its rights and powers under this Indenture at the
request of any holders, unless such holder shall have offered to the Trustee
security and indemnity satisfactory to it against any loss, liability or
expense.

      (f) The Trustee shall not be liable for interest on any money received by
it except as the Trustee may agree in writing with the Company. Money held in
trust by the Trustee need not be segregated from other funds except to the
extent required by law.

<PAGE>

      Section 9.02. Rights of Trustee.

      (a) Subject to the provisions of Section 9.01(a) hereof, the Trustee may
rely on any document believed by it to be genuine and to have been signed or
presented by the proper person. The Trustee need not investigate any fact or
matter stated in the document.

      (b) Before the Trustee acts or refrains from acting, it may require an
Officers' Certificate or an Opinion of Counsel, or both. The Trustee shall not
be liable for any action it takes or omits to take in good faith in reliance on
such Officers' Certificate or Opinion of Counsel. The Trustee may consult with
counsel of its choice and the advice of such counsel or any Opinion of Counsel
with respect to legal matters relating to this Indenture and the Securities
shall be full and complete authorization and protection from liability in
respect of any action taken, suffered or omitted by it hereunder in good faith
and in accordance with the advice or opinion of such counsel.

      (c) The Trustee may act through agents and shall not be responsible for
the misconduct or negligence of any agent appointed with due care.

      (d) The Trustee shall not be liable for any action it takes or omits to
take in good faith which it believes to be authorized or within its rights or
powers; provided, however, that the Trustee's conduct does not constitute
willful misconduct or negligence.

      (e) The Trustee shall not be charged with knowledge of any Event of
Default under subsection (c), (d), (e), (f), (g) or (h) of Section 8.01 unless
either (1) a Trust Officer assigned to its corporate trust department shall have
actual knowledge thereof, or (2) the Trustee shall have received notice thereof
in accordance with Section 12.02 hereof from the Company or any holder; provided
that the Trustee shall comply with the "automatic stay" provisions contained in
U.S. Bankruptcy Law, if applicable.

      (f) Prior to the occurrence of an Event of Default hereunder and after the
curing and waiving of all Events of Default, the Trustee shall not be bound to
make any investigation into the facts or matters stated in any resolution,
certificate, statement, instrument, opinion, report, notice, request, direction,
consent, order, bond, debentures, note, other evidence of indebtedness or other
paper or document unless requested in writing to do so by the holders of not
less than a majority in aggregate principal amount of the Securities then
outstanding; provided that if the payment within a reasonable time to the
Trustee of the costs, expenses or liabilities likely to be incurred by it in the
making of such investigation is, in the opinion of the Trustee, not reasonably
assured to the Trustee by the security afforded to it by the terms of this
Indenture, the Trustee may require reasonable indemnity against expenses or
liabilities as a condition to proceeding; the reasonable expenses of every such
examination shall be paid by the Company or, if advanced by the Trustee, shall
be repaid by the Company upon demand. The Trustee shall not be bound to
ascertain or inquire as to the performance or observance of any covenants,
conditions, or agreements on the part of the Company, except as otherwise set
forth herein, but the Trustee may, in its discretion, make such further inquiry
or investigation into such facts or matters as it may see fit and if the Trustee
shall determine to make such further inquiry or investigation, it shall be
entitled to examine the books, records and premises of the Company personally or
by agent or attorney at the sole cost of the Company.

      (g) The Trustee shall not be required to give any bond or surety in
respect of the performance of its powers and duties hereunder.

      (h) The rights, privileges, protections, immunities and benefits given to
the Trustee, including, without limitation, its right to be indemnified, are
extended to, and shall be enforceable by, the Trustee in each of its capacities
hereunder and to each Agent employed to act hereunder.

      Section 9.03. Individual Rights of Trustee. The Trustee in its individual
or any other capacity may become the owner or pledgee of Securities and may
otherwise deal with the Company or an Affiliate with the same rights it would
have if it were not Trustee. Any Agent may do the same with like rights.
However, in the event that the Trustee acquires any conflicting interest (as
defined in the TIA) it must eliminate such conflict within 90 days, apply to the
Commission for permission to continue as Trustee or resign. Any Agent may do the
same with like rights and duties. The Trustee is also subject to Sections 9.10
and 9.11 hereof.

<PAGE>

      Section 9.04. Trustee's Disclaimer. The Trustee makes no representation as
to the validity or adequacy of this Indenture or the Securities, it shall not be
accountable for the Company's use of the proceeds from the Securities, and it
shall not be responsible for any statement of the Company in this Indenture or
any statement in the Securities (other than its certificate of authentication)
or for compliance by the Company with the Registration Agreement.

      Section 9.05. Notice of Defaults. If a Default or Event of Default occurs
and is continuing and if it is known to the Trustee, the Trustee shall mail to
Noteholders a notice of the Default or Event of Default within 90 days after it
occurs. Except in the case of a Default or Event of Default relating to the
failure to pay any principal of or premium, if any, interest or Liquidated
Damages, if any, on any Security, the Trustee may withhold the notice if and so
long as a committee of its Trust Officers in good faith determines that
withholding the notice is in the interests of Noteholders.

      Section 9.06. Reports by Trustee to Noteholders. Within 60 days after the
reporting date stated in Section 12.10, the Trustee shall mail to Noteholders a
brief report dated as of such reporting date that complies with TIA S 313(a) if
and to the extent required by such S 313(a). The Trustee also shall comply with
TIA S 313(b)(2). The Trustee shall also transmit by mail all reports as required
by TIA S 313(c).

      A copy of each report at the time of its mailing to Noteholders shall be
filed with the SEC and each stock exchange on which the Securities are listed.
The Company shall notify the Trustee when the Securities are listed on any stock
exchange and of any delisting thereof.

      Section 9.07. Compensation and Indemnity. The Company shall pay to the
Trustee from time to time such compensation for its services hereunder as shall
be agreed upon from time to time in writing by the Company and the Trustee. The
Trustee's compensation shall not be limited by any law on compensation of a
trustee of an express trust. The Company shall reimburse the Trustee upon
request for all reasonable disbursements, expenses and advances incurred or made
by it in connection with the performance of its duties hereunder. Such
disbursements and expenses may include the reasonable disbursements,
compensation and expenses of the Trustee's agents and counsel.

      The Company shall indemnify each of the Trustee and each predecessor
Trustee against any and all loss, damage, claim, liability or expense incurred
by it in connection with the performance of its duties hereunder except as set
forth in the next paragraph. The Trustee shall notify the Company promptly of
any claim for which it may seek indemnity. Failure by the Trustee to notify the
Company shall not release the Company of its obligations hereunder. The Company
shall defend the claim and the Trustee shall cooperate in the defense. If in the
reasonable opinion of the Trustee, a conflict of interest exists between the
Trustee and the Company with respect to such claim, the Trustee may have
separate counsel and the Company shall pay the reasonable fees, disbursements
and expenses of such counsel. The Company need not pay for any settlement made
without its consent, which consent shall not be unreasonably withheld.

      The Company need not reimburse any expense or indemnify against any loss
or liability incurred by the Trustee through the Trustee's negligence or bad
faith.

      The obligations of the Company under this Section 9.07 shall survive the
resignation or removal of the Trustee and the satisfaction and discharge of the
Indenture.

      To secure the Company's payment obligations in this Section, the Trustee
shall have a lien on all money or property held or collected by the Trustee,
except money or property held in trust to pay principal of, or premium, if any,
interest or Liquidated Damages, if any, on, particular Securities. Such lien
shall survive the satisfaction or discharge of the indenture.

      When the Trustee incurs expenses or renders services after an Event of
Default specified in Section 8.01(g) or (h) occurs, the expenses and the
compensation for the services are intended to constitute expenses of
administration under any Bankruptcy Law.

      Section 9.08. Replacement of Trustee. A resignation or removal of the
Trustee and appointment of a successor Trustee shall become effective only upon
the successor Trustee's acceptance of appointment as provided in this Section.

      The Trustee may resign in writing at any time and be discharged from the
trust hereby created by so notifying the Company. The Noteholders of a majority
in principal amount of the then outstanding Securities may remove the Trustee by
so notifying the Trustee and the Company in writing. The Company may remove the
Trustee if:

            (a) the Trustee fails to comply with Section

<PAGE>

      9.10 hereof, unless the Trustee's duty to resign is stayed as provided in
      TIA S 310(b);

            (b) the Trustee is adjudged a bankrupt or an insolvent or an order
      for relief is entered with respect to the Trustee under any Bankruptcy
      Law;

            (c) a Custodian or public officer takes charge of the Trustee or its
      property; or

            (d) the Trustee becomes incapable of acting.

      If the Trustee resigns or is removed or if a vacancy exists in the office
of Trustee for any reason, the Company shall promptly appoint a successor
Trustee. Within one year after the successor Trustee takes office, the
Noteholders of a majority in principal amount of the then outstanding Securities
may appoint a successor Trustee to replace the successor Trustee appointed by
the Company.

      If a successor Trustee does not take office within 60 days after the
retiring Trustee resigns or is removed, the retiring Trustee, the Company or the
Noteholders of at least 10% in principal amount of the then outstanding
Securities may petition, at the expense of the Company, any court of competent
jurisdiction for the appointment of a successor Trustee.

      If the Trustee fails to comply with Section 9.10 hereof, unless the
Trustee's duty to resign is stayed as provided in TIA S 310(b), any Noteholder
who has been a bona fide holder of a Security for at least six months may
petition any court of competent jurisdiction for the removal of the Trustee and
the appointment of a successor Trustee.

      A successor Trustee shall deliver a written acceptance of its appointment
to the retiring Trustee and to the Company. Thereupon the resignation or removal
of the retiring Trustee shall become effective, and the successor Trustee shall
have all the rights, powers and duties of the Trustee under this Indenture. The
successor Trustee shall mail a notice of its succession to Noteholders. The
retiring Trustee shall promptly transfer all property held by it as Trustee to
the successor Trustee, subject to the lien provided for in Section 9.07 hereof.
Notwithstanding the resignation or replacement of the Trustee pursuant to this
Section 9.08, the Company's obligations under Section 9.07 hereof shall continue
for the benefit of the retiring trustee with respect to expenses and liabilities
incurred by it prior to such resignation or replacement.

      Section 9.09. Successor Trustee by Merger, Etc. If the Trustee
consolidates, merges or converts into, or transfers all or substantially all of
its corporate trust business to, another corporation, the successor corporation
without any further act shall be the successor Trustee.

      In case at the time such successor or successors by merger, conversion or
consolidation to the Trustee shall succeed to the trusts created by this
Indenture any of the Securities shall have been authenticated but not delivered,
any such successor to the Trustee may adopt the certificate of authentication of
any predecessor trustee, and deliver such Securities so authenticated; and in
case at that time any of the Securities shall not have been authenticated, any
successor to the Trustee may authenticate such Securities either in the name of
any predecessor hereunder or in the name of the successor to the Trustee; and in
all such cases such certificates shall have the full force which it is anywhere
in the Securities or in this Indenture provided that the certificate of the
Trustee shall have.

      Section 9.10. Eligibility; Disqualification. This Indenture shall always
have a Trustee who satisfies the requirements of TIA S 310(a)(1), (2) and (5).
The Trustee shall always have a combined capital and surplus as stated in
Section 12.10 hereof. The Trustee is subject to TIA S 310(b); provided, however,
that there shall be excluded from the operation of TIA S 310(b)(1) any indenture
or indentures under which other securities or certificates of interest or
participation in other securities of the Company are outstanding if the
requirements for such exclusion set forth in TIA S 310(b)(1) are met.

      Section 9.11. Preferential Collection of Claims Against Company. The
Trustee is subject to TIA S 311(a), excluding any creditor relationship listed
in TIA S 311(b). A Trustee who has resigned or been removed shall be subject to
TIA S 311(a) to the extent indicated therein.

<PAGE>

                                    ARTICLE X

                             DISCHARGE OF INDENTURE

      Section 10.01. Termination of the Company's Obligations. This Indenture
shall cease to be of further effect (except as to any surviving rights of
conversion, registration of transfer or exchange of Securities herein expressly
provided for and except as further provided below), and the Trustee, on demand
of and at the expense of the Company, shall execute proper instruments
acknowledging satisfaction and discharge of this Indenture, when

      (a) either

            (i) all Securities theretofore authenticated and delivered (other
      than (i) Securities which have been destroyed, lost or stolen and which
      have been replaced or paid as provided in Section 2.07 and (ii) Securities
      for whose payment money has theretofore been deposited in trust and
      thereafter repaid to the Company as provided in Section 10.02) have been
      delivered to the Trustee for cancellation; or

            (ii) all suchSecurities not theretofore delivered to the Trustee for
      cancellation

                  (A) have become due and payable, or

                  (B) will become due and payable at the final maturity date
            within one year, or

                  (C) are to be called for redemption within one year under
            arrangements satisfactory to the Trustee for the giving of notice of
            redemption by the Trustee in the name, and at the expense, of the
            Company,

      and the Company, in the case of clause (A), (B) or (C) above, has
      irrevocably deposited or caused to be irrevocably deposited with the
      Trustee as trust funds in trust for the purpose cash in an amount
      sufficient to pay and discharge the entire indebtedness on such Securities
      not theretofore delivered to the Trustee for cancellation, for principal,
      premium, if any, interest and Liquidated Damages, if any, to the date of
      such deposit (in the case of Securities which have become due and payable)
      or to the final maturity date or redemption date, as the case may be, in
      all other cases;

      (b) the Company has paid or caused to be paid all other sums payable
hereunder by the Company; and

      (c) the Company has delivered to the Trustee an Officers' Certificate and
an Opinion of Counsel, each stating that all conditions precedent herein
provided for relating to the satisfaction and discharge of this Indenture have
been complied with.

      Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 9.07, the obligations of
the Company to pay Liquidated Damages under this Indenture, the Securities and
the Registration Agreement and, if money shall have been deposited with the
Trustee pursuant to subclause (ii) of clause (a) of this Section, the provisions
of Sections 2.03, 2.04, 2.05, 2.06, 2.07, 2.10, 2.11 (second paragraph only),
2.13, 2.15, 3.08, 4.02 (second paragraph only), 4.04, 4.07 and 4.08, Article V
and this Article X, shall survive; and,

<PAGE>

notwithstanding the satisfaction and discharge of this Indenture, the Company
agrees to reimburse the Trustee for any costs or expenses thereafter reasonably
and properly incurred by the Trustee and to compensate the Trustee for any
services thereafter reasonably and properly rendered by the Trustee in
connection with this Indenture, the Registration Agreement or the Securities.
Thereupon, the Trustee upon request of the Company, shall acknowledge in writing
the discharge of the Company's obligations under this Indenture, except for
those surviving obligations specified above.

      Subject to the provisions of Section 10.02, the Trustee shall hold in
trust, for the benefit of the holders, all money deposited with it pursuant to
this Section 10.01 and shall apply the deposited money in accordance with this
Indenture and the Securities to the payment of the principal of, and premium, if
any, interest and Liquidated Damages, if any, on the Securities. Money so held
in trust shall not be subject to the subordination provisions of Article VI.

      Section 10.02. Repayment to Company. The Trustee and the Paying Agent
shall promptly pay to the Company upon request any excess money or securities
held by them at any time.

      The Trustee and the Paying Agent shall pay to the Company upon written
request any money held by them for the payment of principal or interest that
remains unclaimed for two years after the date upon which such payment shall
have become due; provided, however, that the Company shall have first caused
notice of such payment to the Company to be mailed to each Noteholder entitled
thereto no less than 30 days prior to such payment or within such period shall
have published such notice in a financial newspaper of widespread circulation
published in The City of New York, including, without limitation, The Wall
Street Journal (national edition). After payment to the Company, the Trustee and
the Paying Agent shall have no further liability with respect to such money and
Noteholders entitled to the money must look to the Company for payment as
general creditors unless any applicable abandoned property law designates
another person.

      Section 10.03. Reinstatement. If the Trustee or any Paying Agent is unable
to apply any money in accordance with the second paragraph of Section 10.01 by
reason of any legal proceeding or by reason of any order or judgment of any
court or governmental authority enjoining, restraining or otherwise prohibiting
such application, then the Company's obligations under this Indenture and the
Securities shall be revived and reinstated as though no deposit had occurred
pursuant to Section 10.01 until such time as the Trustee or such Paying Agent is
permitted to apply all such money in accordance with Section 10.01; provided,
however, that if the Company has made any payment of the principal of or
premium, if any, interest or Liquidated Damages, if any, on any Securities
because of the reinstatement of its obligations, the Company shall be subrogated
to the rights of the holders of such Securities to receive any such payment from
the money held by the Trustee or such Paying Agent.

                                   ARTICLE XI

                       AMENDMENTS, SUPPLEMENTS AND WAIVERS

      Section 11.01. Without Consent of Noteholders. The Company and the Trustee
may amend or supplement this Indenture or the Securities without the consent of
any Noteholder:

            (a) to cure any ambiguity, defect or inconsistency;

            (b) to comply with Sections 5.13 and 7.01 hereof;

            (c) to provide for uncertificated Securities in addition to
      certificated Securities;

            (d) to make any change that does not adversely affect the legal
      rights hereunder of any Noteholder;

            (e) to qualify this Indenture under the TIA or to comply with the
      requirements of the SEC in order to maintain the qualification of the
      Indenture under the TIA;

<PAGE>

            (f) to make any change that provides any additional rights or
      benefits to the holders of Securities; or

            (g) to evidence and provide for the acceptance under the Indenture
      of a successor Trustee.

      Upon the request of the Company accompanied by a Board Resolution
authorizing the execution of any such amended or supplemental Indenture, and
upon receipt by the Trustee of the documents described in Section 11.07 hereof,
the Trustee shall join with the Company in the execution of any amended or
supplemental Indenture authorized or permitted by the terms of this Indenture
and to make any further appropriate agreements and stipulations that may be
therein contained, but the Trustee shall not be obligated to enter into such
amended or supplemental Indenture that affects its own rights, duties or
immunities under this Indenture or otherwise.

      An amendment under this Section may not make any change that adversely
affects the rights under Article VI of any holder of Senior Debt then
outstanding unless the holders of such Senior Debt (or any group or
representative thereof authorized to give a consent) consent to such change.

      Section 11.02. With Consent of Noteholders. Except as provided below in
this Section 11.02, the Company and the Trustee may amend or supplement this
Indenture or the Securities with the written consent (including consents
obtained in connection with any tender or exchange offer for Securities) of the
Noteholders of at least a majority in principal amount of the then outstanding
Securities. Subject to Sections 8.04 and 8.07 hereof, the Noteholders of a
majority in principal amount of the Securities then outstanding may also by
their written consent (including consents obtained in connection with any tender
offer or exchange offer for Securities) waive any existing Default or Event of
Default as provided in Section 8.04 or waive compliance in a particular instance
by the Company with any provision of this Indenture or the Securities. However,
without the consent of each Noteholder affected, an amendment, supplement or
waiver under this Section may not (with respect to any Securities held by a
nonconsenting Noteholder):

            (a) reduce the amount of Securities whose Noteholders must consent
      to an amendment, supplement or waiver;

            (b) reduce the rate of, or change the time for payment of, interest
      or Liquidated Damages on any Security;

            (c) reduce the principal of or change the fixed maturity of any
      Security or alter the redemption provisions with respect thereto
      (including, without limitation, the amount of any premium payable upon
      redemption);

            (d) make any Security payable in money other than that stated in the
      Security;

            (e) make any change in Section 8.04, 8.07 or 11.02 hereof (this
      sentence);

            (f) waive a default in the payment of the Designated Event Payment
      or any principal of, or premium, if any, or interest or Liquidated
      Damages, if any, on, any Security (other than a rescission of acceleration
      pursuant to Section 8.02 hereof and a waiver of nonpayment of principal,
      premium, if any, interest or Liquidated Damages, if any, that have become
      due solely because of such acceleration of the Securities);

            (g) waive a redemption payment payable on any

<PAGE>

            Security; or

            (h) make any change in the rights of holders of Securities to
      receive payment of principal of, or premium, if any, or interest or
      Liquidated Damages, if any, on, the Securities;

            (i) modify the conversion or subordination provisions in a manner
      adverse to the holders of the Securities; and

            (j) impair the right of Noteholders to convert Securities into
      Common Stock of the Company or otherwise to receive any cash, securities
      or other property receivable by a holder upon conversion of Securities.

      Upon the request of the Company accompanied by a Board Resolution
authorizing the execution of any such amended or supplemental Indenture, and
upon the filing with the Trustee of evidence satisfactory to the Trustee of the
consent of the Holders of Securities as aforesaid, and upon receipt by the
Trustee of the documents described in Section 11.07 hereof, the Trustee shall
join with the Company in the execution of such amended or supplemental Indenture
unless such amended or supplemental Indenture affects the Trustee's own rights,
duties or immunities under this Indenture or otherwise, in which case the
Trustee may in its discretion, but shall not be obligated to, enter into such
amended or supplemental Indenture.

      To secure a consent of the Noteholders under this Section 11.02, it shall
not be necessary for the Noteholders to approve the particular form of any
proposed amendment, supplement or waiver, but it shall be sufficient if such
consent approves the substance thereof.

      Section 11.03. Compliance with Trust Indenture Act. Every amendment to
this Indenture or the Securities shall be set forth in a supplemental indenture
that complies with the TIA as then in effect.

      Section 11.04. Revocation and Effect of Consents. Until an amendment,
supplement or waiver becomes effective, a consent to it by a Noteholder of a
Security is a continuing consent by the Noteholder and every subsequent
Noteholder of a Security or portion of a Security that evidences the same debt
as the consenting Noteholder's Security, even if notation of the consent is not
made on any Security. However, any such Noteholder or subsequent Noteholder may
revoke the consent as to such Noteholder's Security or portion of a Security if
the Trustee receives the notice of revocation before the date on which the
Trustee receives an Officers' Certificate certifying that the Noteholders of the
requisite principal amount of Securities have consented to the amendment,
supplement or waiver.

      The Company may, but shall not be obligated to, fix a record date for the
purpose of determining the Noteholders entitled to consent to any amendment,
supplement or waiver. If a record date is fixed, then notwithstanding the
provisions of the immediately preceding paragraph, those persons who were
Noteholders at such record date (or their duly designated proxies), and only
those persons, shall be entitled to consent to such amendment, supplement or
waiver or to revoke any consent previously given, whether or not such persons
continue to be Noteholders after such record date. No consent shall be valid or
effective for more than 90 days after such record date unless consents from
Noteholders of the principal amount of Securities required hereunder for such
amendment, supplement or waiver to be effective shall have also been given and
not revoked within such 90-day period.

      After an amendment, supplement or waiver becomes effective it shall bind
every Noteholder, unless it is of the type described in any of clauses (a)
through (j) of Section 11.02 hereof. In such case, the amendment, supplement or
waiver shall bind each Noteholder who has consented to it and every subsequent
Noteholder that evidences the same debt as the consenting Noteholder's Security.

      Upon the execution of any supplemental indenture under this Article XI,
this Indenture shall be modified in accordance therewith, and such supplemental
indenture shall form a part of this Indenture for all purposes; and every holder
of Securities theretofore or thereafter authenticated and delivered hereunder
shall be bound thereby. After a supplemental indenture becomes effective, the
Company shall mail to holders a notice briefly describing such amendment. The
failure

<PAGE>

to give such notice to all holders, or any defect therein, shall not impair or
affect the validity of an amendment under this Article.

      Section 11.05. Notation on or Exchange of Securities. The Trustee may
place an appropriate notation about an amendment, supplement or waiver on any
Security thereafter authenticated. The Company in exchange for all Securities
may issue and the Trustee shall authenticate new Securities that reflect the
amendment, supplement or waiver.

      Failure to make the appropriate notation or issue a new security shall not
affect validity and effect of such amendment, supplement or waiver.

      Section 11.06. Trustee Protected. The Trustee shall sign all supplemental
indentures, except that the Trustee may, but need not, sign any supplemental
indenture that adversely affects its rights.

      Section 11.07. Trustee to Sign Supplemental Indentures. The Company may
not sign a supplemental Indenture until the Board of Directors approves it. In
executing any supplemental indenture, the Trustee shall be entitled to receive
indemnity reasonably satisfactory to it and to receive and (subject to Section
9.01) shall be fully protected in relying upon, in addition to the documents
required by Section 12.04, an Officers' Certificate and an Opinion of Counsel
stating that:

            (a) such supplemental indenture is authorized or permitted by this
      Indenture and that all conditions precedent to the execution, delivery and
      performance of such supplemental indenture have been satisfied;

            (b) the Company has all necessary corporate power and authority to
      execute and deliver the supplemental indenture and that the execution,
      delivery and performance of such supplemental indenture has been duly
      authorized by all necessary corporate action of the Company;

            (c) the execution, delivery and performance of the supplemental
      indenture do not conflict with, or result in the breach of or constitute a
      default under any of the terms, conditions or provisions of (i) this
      Indenture, (ii) the charter documents or by-laws of the Company, or (iii)
      any material agreement or instrument to which the Company is subject and
      of which such counsel is aware;

            (d) to the knowledge of legal counsel writing such Opinion of
      Counsel, the execution, delivery and performance of the supplemental
      indenture do not conflict with, or result in the breach of any of the
      terms, conditions or provisions of (i) any law or regulation applicable to
      the Company, or (ii) any material order, writ, injunction or decree of any
      court or governmental instrumentality applicable to the Company;

            (e) such supplemental indenture has been duly and validly executed
      and delivered by the Company, and this Indenture together with such
      supplemental indenture constitutes a legal, valid and binding obligation
      of the Company enforceable against the Company, in accordance with its
      terms, except as such enforceability may be limited by applicable
      bankruptcy, insolvency, reorganization, fraudulent conveyance or transfer,
      moratorium or similar laws affecting the enforcement of creditors' rights
      generally and general equitable principles (whether considered in a
      proceeding at law or in equity); and

<PAGE>

            (f) this Indenture together with such amendment or supplement
      complies with the TIA.

      Section 11.08. Payment for Consent. Neither the Company nor any Affiliate
of the Company shall, directly or indirectly, pay or cause to be paid any
consideration, whether by way of interest, fee or otherwise, to any holder for
or as an inducement to any consent, waiver or amendment of any of the terms or
provisions of this Indenture or the Securities unless such consideration is
offered to be paid to all holders that so consent, waive or agree to amend in
the time frame set forth in solicitation documents relating to such consent,
waiver or agreement.

                                   ARTICLE XII

                                  MISCELLANEOUS

      Section 12.01. Trust Indenture Act Controls. If any provision of this
Indenture limits, qualifies, or conflicts with another provision which is
automatically deemed to be incorporated in this Indenture by the TIA, the
incorporated provision shall control. If any provision of this Indenture
modifies or excludes any provision of the TIA that may be so modified or
excluded, the latter provision shall be deemed to apply to this Indenture as so
modified or excluded, as the case may be.

      Section 12.02. Notices. Any notice or communication by the Company or the
Trustee to the other is duly given if in writing and delivered in person or
mailed by first-class mail (registered or certified, return receipt requested),
telecopier (promptly confirmed in writing) or overnight air courier guaranteeing
next day delivery to the other's address stated in Section 12.10 hereof. The
Company or the Trustee by notice to the other may designate additional or
different addresses for subsequent notices or communications.

      Any notice or communication to a Noteholder shall be mailed by first-class
mail, postage prepaid to his address shown on the register kept by the
Registrar. Any notice or communication shall also be so mailed to any Person
described in TIA S 313(c), to the extent required by the TIA. Failure to mail a
notice or communication to a Noteholder or any defect in it shall not affect its
sufficiency with respect to other Noteholders.

      If a notice or communication is mailed in the manner provided above within
the time prescribed, it is duly given, whether or not the addressee receives it;
a notice or communication, however, shall not be effective unless, in the case
of the Trustee, actually received.

      If the Company mails a notice or communication to Noteholders, it shall
mail a copy to the Trustee and each Agent at the same time.

      All other notices or communications shall be in writing.

      In case by reason of the suspension of regular mail service, or by reason
of any other cause, it shall be impossible to mail any notice as required by the
Indenture, then such method of notification as shall be made with the approval
of the Trustee shall constitute a sufficient mailing of such notice.

      Section 12.03. Communication by Noteholders with Other Noteholders.
Noteholders may communicate pursuant to TIA S 312(b) with other Noteholders with
respect to their rights under this Indenture or the Securities. The Company, the
Trustee, the Registrar and anyone else shall have the protection of TIA S
312(c).

      Section 12.04. Certificate and Opinion as to Conditions Precedent. Upon
any request or application by the Company to the Trustee to take any action
under this Indenture, the Company shall furnish to the Trustee:

            (a) an Officers' Certificate in form and substance reasonably
      satisfactory to the Trustee (which shall include the statements set forth
      in Section 12.05 hereof) stating that, in the opinion of the signers, all
      conditions precedent and covenants, if any, provided for in

<PAGE>

      this Indenture relating to the proposed action have been satisfied; and

            (b) an Opinion of Counsel in form and substance reasonably
      satisfactory to the Trustee (which shall include the statements set forth
      in Section 12.05 hereof) stating that, in the opinion of such counsel, all
      such conditions precedent and covenants have been satisfied.

      In any case where several matters are required by, or covered by an
opinion of, any specified Person, it is not necessary that all such matters be
certified by, or covered by the opinion of, only one such Person, or that they
be so certified or covered by only one document, but one such Person may certify
or give an opinion with respect to some matters and one or more such Persons as
to other matters, and any such Person may certify or give an opinion as to such
matters in one or several documents.

      Any certificate or opinion of an Officer of the Company may be based,
insofar as it relates to legal matters, upon a certificate or opinion of, or
representations by, counsel, unless such Officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
by, an Officer or Officer of the Company stating that the information with
respect to such factual matters is in the possession of the Company, unless such
counsel knows, or in the exercise of reasonable care should know, that the
certificate of opinion or representations with respect to such matters are
erroneous.

      Where any Person is required to make, give or execute two or more
applications, requests, consents, certificates, statements, opinions or other
instruments under this Indenture, they may, but need not, be consolidated and
form one instrument.

      Any Officers' Certificate, statement or Opinion of Counsel may be based,
insofar as it relates to accounting matters, upon a certificate or opinion of or
representation by an accountant (who may be an employee of the Company), or firm
of accountants, unless such Officer or counsel, as the case may be, knows, or in
the exercise of reasonable care should know, that the certificate or opinion or
representation with respect to the accounting matters upon which his or her
certificate, statement or opinion may be based as aforesaid is erroneous.

      Section 12.05. Statements Required in Certificate or Opinion. Each
certificate or opinion with respect to compliance with a condition or covenant
provided for in this Indenture (other than pursuant to Section 4.03) shall
include:

            (a) a statement that the Persons signing such certificate or
      rendering such opinion has read such covenant or condition;

            (b) a brief statement as to the nature and scope of the examination
      or investigation upon which the statements or opinions contained in such
      certificate or opinion are based;

            (c) a statement that, in the opinion of such Person, such Person has
      made such examination or investigation as is necessary to enable such
      Person to express an informed opinion as to whether or not such covenant
      or condition has been complied with; and

            (d) a statement as to whether or not, in the opinion of such Person,
      such condition or covenant has been complied with.

      Section 12.06. Rules by Trustee and Agents. The Trustee may make
reasonable rules for action by, or a meeting of, Noteholders. The Registrar or
Paying Agent may make reasonable rules and set reasonable requirements for its
functions.

<PAGE>

      Section 12.07. Legal Holidays. A "Legal Holiday" is a Saturday, a Sunday
or a day on which banking institutions in the State of New York are not required
to be open. If a payment date is a Legal Holiday at a place of payment, payment
may be made at that place on the next succeeding day that is not a Legal
Holiday, and no interest or Liquidated Damages shall accrue for the intervening
period unless the Company shall default in making the payment due on such next
succeeding day. If any other operative date for purposes of this Indenture shall
occur on a Legal Holiday then for all purposes the next succeeding day that is
not a Legal Holiday shall be such operative date.

      Section 12.08. No Recourse Against Others. A director, officer, employee
or stockholder, as such, of the Company shall not have any liability for any
obligations of the Company under the Securities or this Indenture or for any
claim based on, in respect of or by reason of such obligations or their
creation. Each Noteholder by accepting a Security waives and releases all such
liability. The waiver and release are part of the consideration for the issue of
the Securities.

      Section 12.09. Counterparts. This Indenture may be executed in any number
of counterparts and by the parties hereto in separate counterparts, each of
which when so executed shall be deemed to be an original and all of which taken
together shall constitute one and the same agreement.

      Section 12.10. Variable Provisions. "Officer" means the Chairman of the
Board, the Chief Executive Officer, the President, any Vice-President, the Chief
Financial Officer, the Treasurer, the Secretary, any Assistant Treasurer, any
Assistant Secretary or the Controller of the Company.

      The Company initially appoints the Trustee as Paying Agent, Registrar and
Conversion Agent, and the Trustee hereby accepts such appointments.

      The first certificate pursuant to Section 4.03 hereof shall be for the
fiscal year ending on December 31, 2000.

      The reporting date for Section 9.06 hereof is February 15 of each year.
The first reporting date is February 15, 2000.

      The Trustee shall always have a combined capital and surplus of at least
$50,000,000 as set forth in its most recent published annual report of
condition.

      The Company's address for purposes of the Indenture is:

      DoubleClick Inc.
      41 Madison Avenue, 32nd Floor
      New York, New York 10010
      Attention:  Chief Financial Officer
      Telephone No.:  (212) 683-0001
      Telecopier No.:  (212) 889-0029

      The Trustee's address is:

      The Bank of New York
      101 Barclay Street, Floor 21 West
      New York, New York 10286
      Attn:  Corporate Trust Trustee Administration
      Telephone No.:  (212) 815-5763
      Telecopier No.:  (212) 815-5915

      The Company or the Trustee may change its address for purposes of this
Indenture by written notice to the other.

      Section 12.11. GOVERNING LAW. THE INTERNAL LAWS OF THE STATE OF NEW YORK
SHALL GOVERN THIS INDENTURE AND THE SECURITIES, WITHOUT REGARD, TO THE EXTENT
PERMITTED BY LAW, TO THE CONFLICT OF LAWS PROVISIONS THEREOF.

<PAGE>

      Section 12.12. No Adverse Interpretation of Other Agreements. This
Indenture may not be used to interpret another indenture, loan or debt agreement
of the Company or an Affiliate. Any such indenture, loan or debt agreement may
not be used to interpret this Indenture.

      Section 12.13. Successors. All agreements of the Company in this Indenture
and the Securities shall bind its successor. All agreements of the Trustee in
this Indenture shall bind its successor.

      Section 12.14. Severability. In case any provision in this Indenture or in
the Securities shall be invalid, illegal or unenforceable, then (to the extent
permitted by law) the validity, legality and enforceability of the remaining
provisions shall not in any way be affected or impaired thereby.

      Section 12.15. Table of Contents, Headings, Etc. The Table of Contents and
headings of the Articles and Sections of this Indenture and the Securities have
been inserted for convenience of reference only, are not to be considered a part
hereof or thereof, and shall in no way modify or restrict any of the terms or
provisions hereof or thereof.

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

                                        DoubleClick Inc., as Company,


                                           By __________________________________
                                              Name:
                                              Title:

                                        The Bank of New York, as Trustee,


                                        By _____________________________________
                                           Name:
                                           Title:

<PAGE>

                                    EXHIBIT A

                      FORM OF CONVERTIBLE SUBORDINATED NOTE

                           [Global Securities Legend]

      UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), NEW YORK, NEW
YORK, TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR
PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR
IN SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND
ANY PAYMENT IS MADE TO CEDE & CO., OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC) ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

<PAGE>

      TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE,
BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH
SUCCESSOR'S NOMINEE AND TRANSFERS OF PORTIONS OF THIS GLOBAL SECURITY SHALL BE
LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE
INDENTURE REFERRED TO ON THE REVERSE HEREOF.

 [Restricted Global Securities Legend For Inclusion in Global Securities Only]

      THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"). THE HOLDER HEREOF, BY PURCHASING THIS SECURITY,
AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS SECURITY MAY NOT BE RESOLD,
PLEDGED OR OTHERWISE TRANSFERRED (X) PRIOR TO THE SECOND ANNIVERSARY OF THE
ISSUANCE HEREOF (OR ANY PREDECESSOR SECURITY HERETO) OR (Y) BY ANY HOLDER THAT
WAS AN "AFFILIATE" (WITHIN THE MEANING OF RULE 144 UNDER THE SECURITIES ACT) OF
THE COMPANY AT ANY TIME DURING THE THREE MONTHS PRECEDING THE DATE OF SUCH
TRANSFER, IN EITHER CASE OTHER THAN (1) TO THE COMPANY, (2) SO LONG AS THIS
SECURITY IS ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT
("RULE 144A"), TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
INSTITUTIONAL BUYER WITHIN THE MEANING OF RULE 144A, PURCHASING FOR ITS OWN
ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS
GIVEN THAT THE RESALE, PLEDGE OR OTHER TRANSFER IS BEING MADE IN RELIANCE ON
RULE 144A, (3) IN AN OFFSHORE TRANSACTION (AS DEFINED IN REGULATION S UNDER THE
SECURITIES ACT) IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES ACT, (4) TO
AN INSTITUTION THAT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501(a)(1),
(2), (3) OR (7) UNDER THE SECURITIES ACT ("INSTITUTIONAL ACCREDITED INVESTOR")
THAT IS ACQUIRING THIS SECURITY FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION
AND THAT, PRIOR TO SUCH TRANSFER, DELIVERS TO THE COMPANY AND THE TRUSTEE A
SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE
RESTRICTIONS ON TRANSFER OF THE SECURITY EVIDENCED HEREBY (THE FORM OF WHICH
LETTER MAY BE OBTAINED FROM THE TRUSTEE), (5) PURSUANT TO AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 (IF APPLICABLE) UNDER
THE SECURITIES ACT OR (6) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER
THE SECURITIES ACT, IN EACH CASE IN ACCORDANCE WITH ANY APPLICABLE SECURITIES
LAWS OF ANY STATE OF THE UNITED STATES. THE HOLDER HEREOF, BY PURCHASING THIS
SECURITY, REPRESENTS AND AGREES FOR THE BENEFIT OF THE COMPANY THAT IT IS (1) A
QUALIFIED INSTITUTIONAL BUYER OR (2) AN INSTITUTIONAL ACCREDITED INVESTOR AND
THAT IT IS HOLDING THIS SECURITY FOR INVESTMENT PURPOSES AND NOT FOR
DISTRIBUTION OR (3) NOT A U.S. PERSON AND IS OUTSIDE THE UNITED STATES WITHIN
THE MEANING OF (OR AN ACCOUNT SATISFYING THE REQUIREMENTS OF PARAGRAPH (k)(2) OF
RULE 902 UNDER) REGULATION S UNDER THE SECURITIES ACT. IN ANY CASE THE HOLDER
HEREOF WILL NOT, DIRECTLY OR INDIRECTLY, ENGAGE IN ANY HEDGING TRANSACTIONS WITH
REGARD TO THIS SECURITY OR ANY COMMON STOCK ISSUABLE UPON CONVERSION OF THIS
SECURITY EXCEPT AS PERMITTED BY THE SECURITIES ACT.

      [Restricted Definitive Securities Legend For Inclusion in Definitive
                                Securities Only]

      THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
AMENDED (THE "SECURITIES ACT"). THE HOLDER HEREOF, BY PURCHASING THIS SECURITY,
AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS SECURITY MAY NOT BE RESOLD,
PLEDGED OR OTHERWISE TRANSFERRED (X) PRIOR TO THE SECOND ANNIVERSARY OF THE
ISSUANCE HEREOF (OR ANY PREDECESSOR SECURITY HERETO) OR (Y) BY ANY HOLDER THAT
WAS AN "AFFILIATE" (WITHIN THE MEANING OF RULE 144 UNDER THE SECURITIES ACT) OF
THE COMPANY AT ANY TIME DURING THE THREE MONTHS PRECEDING THE DATE OF SUCH
TRANSFER, IN EITHER CASE OTHER THAN (1) TO THE COMPANY, (2) SO LONG AS THIS
SECURITY IS ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT
("RULE 144A"), TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
INSTITUTIONAL BUYER WITHIN THE

<PAGE>

MEANING OF RULE 144A, PURCHASING FOR ITS OWN ACCOUNT OR FOR THE ACCOUNT OF A
QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS GIVEN THAT THE RESALE, PLEDGE OR
OTHER TRANSFER IS BEING MADE IN RELIANCE ON RULE 144A (AS INDICATED BY THE BOX
CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS
SECURITY), (3) IN AN OFFSHORE TRANSACTION (AS DEFINED IN REGULATION S UNDER THE
SECURITIES ACT) IN ACCORDANCE WITH REGULATION S UNDER THE SECURITIES ACT (AS
INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON
THE REVERSE OF THIS SECURITY), (4) TO AN INSTITUTION THAT IS AN "ACCREDITED
INVESTOR" AS DEFINED IN RULE 501(a)(1), (2), (3) OR (7) UNDER THE SECURITIES ACT
("INSTITUTIONAL ACCREDITED INVESTOR") (AS INDICATED BY THE BOX CHECKED BY THE
TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS SECURITY) THAT
IS ACQUIRING THIS SECURITY FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION AND
THAT, PRIOR TO SUCH TRANSFER, DELIVERS TO THE COMPANY AND THE TRUSTEE A SIGNED
LETTER CONTAINING CERTAIN REPRESENTATIONS AND AGREEMENTS RELATING TO THE
RESTRICTIONS ON TRANSFER OF THE SECURITY EVIDENCED HEREBY (THE FORM OF WHICH
LETTER MAY BE OBTAINED FROM THE TRUSTEE), (5) PURSUANT TO AN EXEMPTION FROM
REGISTRATION UNDER THE SECURITIES ACT PROVIDED BY RULE 144 (IF APPLICABLE) UNDER
THE SECURITIES ACT OR (6) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER
THE SECURITIES ACT, IN EACH CASE IN ACCORDANCE WITH ANY APPLICABLE SECURITIES
LAWS OF ANY STATE OF THE UNITED STATES. PRIOR TO A TRANSFER OF THIS SECURITY
(OTHER THAN A TRANSFER PURSUANT TO CLAUSE (6) ABOVE), THE HOLDER OF THIS
SECURITY MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE COMPANY AND THE TRUSTEE
SUCH CERTIFICATES AND OTHER INFORMATION AND, IN THE CASE OF A TRANSFER PURSUANT
TO CLAUSE (5) ABOVE, A LEGAL OPINION AS THEY MAY REASONABLY REQUIRE TO CONFIRM
THAT ANY TRANSFER BY IT OF THIS SECURITY COMPLIES WITH THE FOREGOING
RESTRICTIONS. THE HOLDER HEREOF, BY PURCHASING THIS SECURITY, REPRESENTS AND
AGREES FOR THE BENEFIT OF THE COMPANY THAT IT IS (1) A QUALIFIED INSTITUTIONAL
BUYER OR (2) AN INSTITUTIONAL ACCREDITED INVESTOR AND THAT IT IS HOLDING THIS
SECURITY FOR INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION OR (3) NOT A U.S.
PERSON AND IS OUTSIDE THE UNITED STATES WITHIN THE MEANING OF (OR AN ACCOUNT
SATISFYING THE REQUIREMENTS OF PARAGRAPH (k)(2) OF RULE 902 UNDER) REGULATION S
UNDER THE SECURITIES ACT. IN ANY CASE THE HOLDER HEREOF WILL NOT, DIRECTLY OR
INDIRECTLY, ENGAGE IN ANY HEDGING TRANSACTION WITH REGARD TO THIS SECURITY OR
ANY COMMON STOCK ISSUABLE UPON CONVERSION OF THIS SECURITY EXCEPT AS PERMITTED
BY THE SECURITIES ACT.

<PAGE>

                       No. CUSIP No. [Global Security: ]
                             [Definitive Security: ]

                  4.75% Convertible Subordinated Note due 2006

                                DoubleClick Inc.

      DoubleClick Inc., a Delaware corporation (the "Company"), promises to pay
to _____________________________________ or registered assigns, the principal
sum [indicated on Schedule A hereof]* [of _________ Dollars ($_________)]** on
March 15, 2006.

Interest Payment Dates: March 15 and September 15, commencing September 15,
1999.

Record Dates: February 15 and August 15.

      Reference is hereby made to the further provisions of this Security set
forth on the reverse hereof which further provisions shall for all purposes have
the same effect as if set forth at this place.

                            [Signature Page Follows]

<PAGE>

      IN WITNESS WHEREOF, DoubleClick Inc. has caused this Security to be signed
manually or by facsimile by its duly authorized Officers and its corporate seal
or a facsimile thereof to be affixed hereto or imprinted hereon.

DOUBLECLICK INC.,

        By: _______________________________
        Name:
        Title:
        [Seal]

        By:  _______________________________
        Name:
        Title:


Dated:

TRUSTEE'S CERTIFICATE OF
AUTHENTICATION

This is one of the Securities described in the within-mentioned Indenture.

THE BANK OF NEW YORK, as Trustee,

by ______________________________________
   Authorized Signatory

<PAGE>

                                DoubleClick Inc.

                  4.75% Convertible Subordinated Note due 2006

      1. Interest. DoubleClick Inc., a Delaware corporation (the "Company"), is
the issuer of the 4.75% Convertible Subordinated Notes due 2006 (the
"Securities"), of which this Security is a part. The Company promises to pay
interest on the Securities in cash semiannually on each March 15 and September
15, commencing on September 15, 1999, to holders of record at the close of
business on the immediately preceding February 15 or August 15, as the case may
be.

      Interest on the Securities will accrue from the most recent date to which
interest has been paid, or if no interest has been paid, from March 22, 1999.
Interest will be computed on the basis of a 360-day year of twelve 30-day
months. To the extent lawful, the Company shall pay interest (including
post-petition interest in any proceeding under any Bankruptcy Law) on overdue
principal of and premium, if any, interest, and Liquidated Damages, if any, on
the Securities (in each case without regard to any applicable grace period) at
the Default Rate, compounded semi-annually.

      2. Damages, if any, on the Securities (except Defaulted Interest) to the
Persons who are registered holders of the Securities at the close of business on
the record date for the applicable interest payment date even though Securities
are canceled after the record date and on or before the interest payment date.
The Noteholder hereof must surrender Securities to a Paying

<PAGE>

Agent to collect principal payments. The Company will pay principal, premium, if
any, interest and Liquidated Damages, if any, in money of the United States that
at the time of payment is legal tender for payment of public and private debts.
However, the Company may pay interest by check payable in such money. It may
mail an interest check to a holder's registered address.

      3. Paying Agent and Registrar. The Trustee will act as Paying Agent,
Registrar and Conversion Agent. The Company may change any Paying Agent,
Registrar, or Conversion Agent without prior notice.

      4. Indenture. The Company issued the Securities under an indenture, dated
as of March 22, 1999 (the "Indenture"), between the Company and The Bank of New
York, as Trustee. The terms of the Securities include those stated in the
Indenture and those made part of the Indenture by the Trust Indenture Act of
1939 (15 U.S. Code SS 77aaa-77bbbb) as in effect on the date of the Indenture.
The Securities are subject to, and qualified by, all such terms, certain of
which are summarized hereon, and Noteholders are referred to the Indenture and
such Act for a statement of such terms. The Securities are general unsecured
obligations of the Company limited to an aggregate principal amount of up to
$250,000,000. The Indenture does not limit the ability of the Company or any of
its Subsidiaries to incur indebtedness or to grant security interests or liens
in respect of their assets.

      5. Optional Redemption. The Securities are not redeemable at the Company's
option prior to March 20, 2001. On such date and thereafter, the Securities will
be subject to redemption at the option of the Company, in whole or from time to
time in part (in any integral multiple of $1,000); provided that the Securities
are not redeemable prior to March 15, 2003 unless the Daily Market Price exceeds
140% of the Conversion Price for at least 20 trading days in any consecutive 30
trading day period ending on the trading day prior to the date the notice of
redemption is first mailed by the Company pursuant to Section 3.03 of the
Indenture. If redeemed during the 12-month period beginning March 15 of the
years indicated (or March 20 in the case of 2001), the redemption prices
(expressed as percentages of the principle amount( shall be as follows:

Year      Redemption Price
- ----      ----------------

2001          103.393%
2002          102.714%
2003          102.036%
2004          101.357%
2005          100.679%

in each case together with accrued interest and Liquidated Damages, if any, to
(but excluding) the redemption date (subject to the right of holders of record
on the relevant record date to receive interest and Liquidated Damages, if any,
due on the corresponding interest payment date). On or after the redemption
date, interest and Liquidated Damages, if any, will cease to accrue on the
Securities, or portions thereof, called for redemption unless the Company shall
default in the payment of the redemption price and accrued interest and
Liquidated Damages, if any, payable on the redemption date on the Securities to
be redeemed.

      6. Notice of Redemption. Notice of redemption will be mailed at least 30
days but not more than 60 days before the redemption date to each holder of the
Securities to be redeemed at his address of record. Securities in denominations
larger than $1,000 may be redeemed in part but only in integral multiples of
$1,000. In the event of a redemption of less than all of the Securities, the
Securities will be chosen for redemption by the Trustee in accordance with the
Indenture. Unless the Company defaults in making such redemption payment
(including accrued interest and Liquidated Damages, if any), or a Paying Agent
is prohibited from making such payment pursuant to the Indenture, by law or
otherwise, interest and Liquidated Damages, if applicable cease to accrue on the
Securities or portions of them called for redemption on and after the redemption
date.

      If this Security is redeemed subsequent to a record date with respect to
any interest payment date specified above and on or prior to such interest
payment date, then any accrued interest and Liquidated Damages, if any, will be
paid to the person in whose name this Security is registered at the close of
business on such record date.

      7. Mandatory Redemption. The Company will not be

<PAGE>

required to make mandatory redemption payments with respect to the Securities.
There are no sinking fund payments with respect to the Securities.

      8. Repurchase at Option of Holder. If there is a Designated Event, the
Company shall be required to offer to purchase on the Designated Event Payment
Date all outstanding Securities at a purchase price equal to 100% of the
principal amount thereof, plus accrued and unpaid interest and Liquidated
Damages, if any, to the Designated Event Payment Date; provided that, on the
terms and subject to the conditions set forth in the Indenture, the Company
shall not be required to offer to purchase the Securities as aforesaid if the
Company has given notice of redemption of all of the outstanding Securities to
holders in accordance with the Indenture. Holders of Securities that are subject
to an offer to purchase will receive a Designated Event Offer from the Company
prior to any related Designated Event Payment Date and may elect to have such
Securities or portions thereof in authorized denominations purchased by
completing the form entitled "Option of Noteholder To Elect Purchase" appearing
below. Noteholders have the right to withdraw their election by delivering a
written notice of withdrawal to the Company or the Paying Agent in accordance
with the terms of the Indenture.

      9. Subordination. The payment of the principal of, premium, if any, on,
interest and Liquidated Damages, if any, on and any other amounts due on the
Securities is subordinated in right of payment to all existing and future Senior
Debt of the Company, as described in the Indenture. Each Noteholder, by
accepting a Security, agrees to such subordination and authorizes and directs
the Trustee on its behalf to take such action as may be necessary or appropriate
to effectuate the subordination so provided and appoints the Trustee as its
attorney-in-fact for such purpose.

      10. Conversion. The holder of any Security has the right, exercisable at
any time after 90 days following the Issuance Date and prior to the close of
business on the Business Day immediately preceding the final maturity date of
the Security, to convert the principal amount thereof (or any portion thereof
that is an integral multiple of $1,000) into shares of Common Stock at the
initial Conversion Price of $165.00 per share, subject to adjustment under
certain circumstances as provided in the Indenture, except that if a Security is
called for redemption, the conversion right will terminate at the close of
business on the Business Day immediately preceding the date fixed for redemption
(unless the Company shall default in making the redemption payment, including
interest and Liquidated Damages, if any, when it becomes due, in which case the
conversion right shall terminate at the close of business on the date on which
such default is cured). As further provided in the Indenture, the Company agrees
that, upon the occurrence of the Stock Split (which it is currently contemplated
will occur on April 2, 1999), the Conversion Price shall be automatically
adjusted to $82.50 per share.

      Beneficial owners of interests in Global Securities may exercise their
right of conversion by delivering to the Depositary the appropriate instructions
for conversion pursuant to the Depositary's procedures. To convert a
certificated Security, the holder must (1) complete and sign a notice of
election to convert substantially in the form set forth below (or complete and
manually sign a facsimile thereof) and deliver such notice to a Conversion
Agent, (2) surrender the Security to a Conversion Agent, (3) furnish appropriate
endorsements or transfer documents if required by the Conversion Agent, (4) pay
any transfer or similar tax, if required by the Conversion Agent, and (5) if
required, pay funds equal to interest and Liquidated Damages, if any, payable on
the next interest payment date. Upon conversion, no adjustment or payments will
be made for accrued and unpaid interest or Liquidated Damages, if any, on the
Securities so converted or for dividends or distributions on, or Liquidated
Damages, if any, attributable to, any Common Stock issued on conversion of the
Securities, except that, if any Noteholder surrenders a Security for conversion
after the close of business on a record date for the payment of interest and
prior to the opening of business on the next interest payment date, then,
notwithstanding such conversion, the interest payable on such interest payment
date will be paid on such interest payment date to the person who was the
registered holder of such Security on such record date. Any Securities
surrendered for conversion during the period after the close of business on any
record date for the payment of interest and before the opening of business on
the next succeeding interest payment date (except Securities called for
redemption on a redemption date or to be repurchased on a Designated Event
Payment Date during such period) must be accompanied by payment in an amount
equal to the interest and Liquidated Damages, if any, payable on such interest
payment date on the principal amount of Securities so converted. The number of
shares of Common Stock issuable upon conversion of a Security is determined by
dividing the principal amount of the Security converted by the Conversion Price
in effect on the Conversion Date. No fractional shares will be issued upon
conversion but a cash adjustment will be made for any fractional interest.

      A Security in respect of which a holder has delivered an "Option of
Noteholder to Elect Purchase" form appearing below exercising the option of such
holder to require the Company to purchase such Security may be

<PAGE>

converted only if the notice of exercise is withdrawn as provided above and in
accordance with the terms of the Indenture. The above description of conversion
of the Securities is qualified by reference to, and is subject in its entirety
to, the more complete description thereof contained in the Indenture.

      11. Registration Agreement. The holder of this Security is entitled to the
benefits of a Registration Agreement, dated March 22, 1999, between the Company
and the Initial Purchasers (the "Registration Agreement"). Pursuant to the
Registration Agreement the Company has agreed for the benefit of the holders of
the Securities and the Common Stock issued and issuable upon conversion of the
Securities, that (i) it will, at its cost, within 60 days after the Closing
Date, file a shelf registration statement (the "Shelf Registration Statement")
with the Securities and Exchange Commission (the "Commission") with respect to
resales of the Securities and the Common Stock issuable upon conversion thereof,
(ii) the Company will use its reasonable best efforts to cause such Shelf
Registration Statement to be declared effective by the Commission under the
Securities Act within 150 days after the Closing Date and (iii) the Company will
keep such Shelf Registration Statement continuously effective under the
Securities Act until the earliest of (a) the second anniversary of the Closing
Date or, if later, the second anniversary of the last date on which any
Securities are issued upon exercise of the Initial Purchasers' over-allotment
option, (b) the date on which the Securities or the Common Stock issuable upon
conversion thereof may be sold by Persons who are not "affiliates" (as defined
in Rule 144) of the Company pursuant to paragraph (k) of Rule 144 (or any
successor provision) promulgated by the Commission under the Securities Act, (c)
the date as of which the Securities or the Common Stock issuable upon conversion
thereof have been transferred pursuant to Rule 144 under the Securities Act (or
any similar provision then in force) and (d) the date as of which all the
Securities or the Common Stock issuable upon conversion thereof have been sold
pursuant to such Shelf Registration Statement.

      If the Shelf Registration Statement (i) is not filed with the Commission
on or prior to 60 days, or has not been declared effective by the Commission
within 150 days, after the Closing Date or (ii) is filed and declared effective
but shall thereafter cease to be effective (without being succeeded immediately
by a replacement shelf registration statement filed and declared effective) or
cease to be usable (including, without limitation, as a result of a Suspension
Period as defined below) for the offer and sale of Transfer Restricted
Securities (as defined below) for a period of time (including any Suspension
Period) which shall exceed 60 days in the aggregate in any 12-month period
during the period beginning on the Closing Date and ending on the second
anniversary of the Closing Date or, if later, the second anniversary of the last
date on which any Securities are issued upon exercise of the Initial Purchasers'
over-allotment option (each such event referred to in clauses (i) and (ii) being
referred to herein as a "Registration Default"), the Company will pay liquidated
damages ("Liquidated Damages") to each holder of Transfer Restricted Securities
which has complied with its obligations under the Registration Agreement. The
amount of Liquidated Damages payable during any period in which a Registration
Default shall have occurred and be continuing is that amount which is equal to
one-quarter of one percent (25 basis points) per annum per $1,000 principal
amount of Securities and $2.50 per annum per 6.06061 shares of Common Stock
(subject to adjustment from time to time in the event of a stock split, stock
recombination, stock dividend and the like) constituting Transfer Restricted
Securities for the first 90 days during which a Registration Default has
occurred and is continuing and one-half of one percent (50 basis points) per
annum per $1,000 principal amount of Securities and $5.00 per annum per 6.06061
shares of Common Stock (subject to adjustment as set forth above) constituting
Transfer Restricted Securities for any additional days during which such
Registration Default has occurred and is continuing; provided that, as further
provided in the Registration Agreement, the Company hereby agrees that, upon the
occurrence of the Stock Split (which it is currently contemplated will occur on
April 2, 1999), the Liquidated Damages payable in respect of Common Stock shall
be automatically adjusted to $2.50 per annum per 12.12121 shares of Common Stock
for the first such 90 days during which a Registration Default has occurred and
is continuing and $5.00 per annum per 12.12121 shares of Common Stock for any
additional days during which such Registration Default has occurred and is
continuing (in each case subject to further adjustment from time to time in the
event of a stock split, stock recombination, stock dividend and the like). The
Company will pay all accrued Liquidated Damages by wire transfer of immediately
available funds or by federal funds check on each Damages Payment Date, and
Liquidated Damages will be calculated on the basis of a 360-day year consisting
of twelve 30-day months. Following the cure of a Registration Default,
Liquidated Damages will cease to accrue with respect to such Registration
Default.

      "Transfer Restricted Securities" means each Security and each share of
Common Stock issued on conversion thereof until the earlier of the date (A) on
which such Security or share, as the case may be, (i) has been transferred
pursuant to the Shelf Registration Statement or another registration statement
covering such Security or share which has been filed with the Commission
pursuant to the Securities Act, in either case after such registration statement
has become and while such registration statement is effective under the
Securities Act, (ii) has been transferred pursuant to Rule 144 under the
Securities Act (or any similar provision then in force), or (iii) may be sold or
transferred pursuant to Rule 144(k) under the

<PAGE>

Securities Act (or any similar provision then in force), or (B) that is the
second anniversary of the Closing Date or, if later, the second anniversary of
the last date on which any Securities are issued upon exercise of the Initial
Purchasers' over-allotment option.

      Pursuant to the Registration Agreement, the Company may suspend the use of
the prospectus which is a part of the Shelf Registration Statement for a period
not to exceed 30 days in any three-month period or for three periods not to
exceed an aggregate of 90 days in any twelve-month period under certain
circumstances (each, a "Suspension Period"); provided that the existence of a
Suspension Period will not prevent the occurrence of a Registration Default or
otherwise limit the obligation of the Company to pay Liquidated Damages.

      The above description of certain provisions of the Registration Agreement
is qualified by reference to, and is subject in its entirety to, the more
complete description thereof contained in the Registration Agreement.

      12.   Denominations, Transfer, Exchange and Replacement. The Securities
            are in registered form, without coupons, in denominations of $1,000
            and integral multiples of $1,000. The transfer of Securities may be
            registered, and Securities may be exchanged, as provided in the
            Indenture. The Registrar may require a Noteholder, among other
            things, to furnish appropriate endorsements and transfer documents
            and to pay any taxes and fees required by law or permitted by the
            Indenture. The Registrar need not exchange or register the transfer
            of any Security or portion of a Security selected for redemption
            (except the unredeemed portion of any Security being redeemed in
            part). Also, it need not exchange or register the transfer of any
            Security for a period beginning at the opening of business 15 days
            before the day of mailing of a notice of redemption of Securities
            and ending at the close of business on the day of such mailing.
            Replacement Securities for lost, stolen or mutilated Securities may
            be issued in accordance with the terms of the Indenture.

      13.   Persons Deemed Owners. The registered Noteholder of a Security may
            be treated as its owner for all purposes.

      14.   Unclaimed Money. If money for the payment of principal of or
            premium, if any, interest or Liquidated Damages, if any, on
            Securities remains unclaimed for two years, the Trustee and the
            Paying Agent shall pay the money back to the Company at its written
            request. After that, Noteholders of Securities entitled to the money
            must look to the Company for payment, unless an abandoned property
            law designates another person, and all


                                       60
<PAGE>

            liability of the Trustee and such Paying Agent with respect to such
            money shall cease.

      15.   Defaults and Remedies. The Securities shall have the Events of
            Default as set forth in Section 8.01 of the Indenture. Subject to
            certain limitations in the Indenture, if an Event of Default occurs
            and is continuing, the Trustee by notice to the Company or the
            Noteholders of at least 25% in aggregate principal amount of the
            then outstanding Securities by notice to the Company and the Trustee
            may declare all the Securities to be due and payable immediately,
            except that in the case of an Event of Default arising from certain
            events of bankruptcy or insolvency, all unpaid principal, premium,
            if any, and accrued and unpaid interest and Liquidated Damages, if
            any, on the Securities shall become due and payable immediately
            without further action or notice. Upon acceleration as described in
            either of the preceding sentences, the subordination provisions of
            the Indenture preclude any payment being made to Noteholders for at
            least 5 Business Days except as otherwise provided in the Indenture.

      The Noteholders of a majority in principal amount of the Securities then
outstanding by written notice to the Trustee may rescind an acceleration and its
consequences if the rescission would not conflict with any judgment or decree
and if all existing Events of Default have been cured or waived except
nonpayment of principal, premium, if any, Liquidated Damages, if any, and
interest that has become due solely because of the acceleration. Noteholders may
not enforce the Indenture or the Securities except as provided in the Indenture.
Subject to certain limitations, Noteholders of a majority in principal amount of
the then outstanding Securities issued under the Indenture may direct the
Trustee in its exercise of any trust or power. The Company must furnish
compliance certificates to the Trustee annually. The above description of Events
of Default and remedies is qualified by reference to, and subject in its
entirety to, the more complete description thereof contained in the Indenture.

      16.   Amendments,Supplements and Waivers. Subject to certain exceptions,
            the Indenture or the Securities may be amended or supplemented with
            the consent of the Noteholders of at least a majority in principal
            amount of the then outstanding Securities (including consents
            obtained in connection with a tender offer or exchange offer for
            Securities), and any existing default may be waived with the consent
            of the Noteholders of a majority in principal amount of the then
            outstanding Securities (including consents obtained in connection
            with a tender offer or exchange offer for Securities). Without the
            consent of any Noteholder, the Indenture or the Securities may be
            amended, among other

<PAGE>

            things, to cure any ambiguity, defect or inconsistency, to provide
            for assumption by a successor of the Company's obligations to
            Noteholders, to make any change that does not adversely affect the
            rights of any Noteholder, to qualify the Indenture under the TIA, or
            to comply with the requirements of the SEC in order to maintain the
            qualification of the Indenture under the TIA.

      17.   Trustee Dealings with the Company. The Trustee, in its individual or
            any other capacity, may become the owner or pledgee of the
            Securities and may otherwise deal with the Company or an Affiliate
            of the Company with the same rights it would have, as if it were not
            Trustee, subject to certain limitations provided for in the
            Indenture and in the TIA. Any Agent may do the same with like
            rights.

      18.   No Recourse Against Others. A director, officer, employee or
            stockholder, as such, of the Company shall not have any liability
            for any obligations of the Company under the Securities or the
            Indenture or for any claim based on, in respect of or by reason of
            such obligations or their creation. Each Noteholder, by accepting a
            Security, waives and releases all such liability. The waiver and
            release are part of the consideration for the issue of the
            Securities.

      19.   Governing Law; Indenture to Control. THE INTERNAL LAWS OF THE STATE
            OF NEW YORK SHALL GOVERN THE INDENTURE AND THE SECURITIES WITHOUT
            REGARD, TO THE EXTENT PERMITTED BY LAW, TO CONFLICT OF LAW
            PROVISIONS THEREOF. IN THE EVENT OF ANY CONFLICT BETWEEN THE
            PROVISIONS OF THIS SECURITY ON THE ONE HAND AND THE INDENTURE OR THE
            REGISTRATION AGREEMENT, ON THE OTHER HAND, THE PROVISIONS OF THE
            INDENTURE OR THE REGISTRATION AGREEMENT, AS THE CASE MAY BE, SHALL
            CONTROL.

      20.   Authentication. The Securities shall not be valid until
            authenticated by the manual signature of an authorized signatory of
            the Trustee or an authenticating agent.

      21.   Abbreviations. Customary abbreviations may be used in the name of a
            Noteholder or an assignee, such as: TEN COM (for tenants

<PAGE>

            in common), TEN ENT (for tenants by the entireties), JT TEN (for
            joint tenants with right of survivorship and not as tenants in
            common), CUST (for Custodian), and U/G/M/A (for Uniform Gifts to
            Minors Act).

      22.   Definitions. Capitalized terms not defined in this Security have the
            meanings given to them in the Indenture.

      The Company will furnish to any Noteholder of the Securities upon written
request and without charge a copy of the Indenture and the Registration
Agreement. Request may be made to:

                        DoubleClick Inc.
                        41 Madison Avenue, 32nd Floor
                        New York, New York 10010

                             CERTIFICATE OF TRANSFER

                To assign this Security, fill in the form below:

                (I) or (we) assign and transfer this Security to

- --------------------------------------------------------------------------------
               (Insert assignee's social security or tax I.D. no.)

- --------------------------------------------------------------------------------
              (Print or type assignee's name, address and zip code)

and irrevocably appoint ____________________________ agent to transfer this
Security on the books of the Company. The agent may substitute another to act
for him.

 Your Signature: _______________________________________________
         (Sign exactly as your name appears on the other side of
         this Security)

Date: ___________________

Medallion Signature Guarantee: ____________________

[For inclusion only if this Security bears a Restricted Securities Legend] In
connection with any transfer of any of the Securities evidenced by this
certificate which are "restricted securities" (as defined in Rule 144 (or any
successor thereto) under the Securities Act), the undersigned confirms that such
Securities are being transferred:

CHECK ONE BOX BELOW

            (1)   |_|   to the Company; or

            (2)   |_|   pursuant to and in compliance with Rule 144A under the
                        Securities Act of 1933; or

<PAGE>

            (3)   |_|   pursuant to and in compliance with Regulation S under
                        the Securities Act of 1933; or

            (4)   |_|   to an institutional "accredited investor" (as defined in
                        Rule 501(a)(1), (2), (3) or (7) under the Securities Act
                        of 1933) that has furnished to the Trustee a signed
                        letter containing certain representations and agreements
                        (the form of which letter can be obtained from the
                        Trustee); or

            (5)   |_|   pursuant to an exemptionfrom registration under the
                        Securities Act of 1933 provided by Rule 144 thereunder.

            Unless one of the boxes is checked, the Registrar will refuse to
            register any of the Securities evidenced by this certificate in the
            name of any person other than the registered holder thereof;
            provided, however, that if box (3), (4) or (5) is checked, the
            Trustee may require, prior to registering any such transfer of the
            Securities, such certifications and other information, and if box
            (5) is checked such legal opinions, as the Company has reasonably
            requested in writing, by delivery to the Trustee of a standing
            letter of instruction, to confirm that such transfer is being made
            pursuant to an exemption from, or in a transaction not subject to,
            the registration requirements of the Securities Act of 1933;
            provided that this paragraph shall not be applicable to any
            Securities which are not "restricted securities" (as defined in Rule
            144 (or any successor thereto) under the Securities Act).

      Your Signature: __________________________________ (Sign exactly as your
name appears on the other side of this Security)

Date: __________________


Medallion Signature Guarantee:


________________________________

<PAGE>

                      [TO BE ATTACHED TO GLOBAL SECURITIES]

                                   SCHEDULE A

      The initial principal amount of this Global Security shall be $ . The
following increases or decreases in the principal amount of this Global Security
have been made:

<TABLE>
<CAPTION>
- --------------    ---------------------    ---------------------     --------------------     ---------------------
                  Amount of increase
                  in Principal Amount                                                         Signature of
                  of this Global                                     Principal Amount of      authorized
                  Security including       Amount of decrease in     this Global Security     signatory of
                  upon exercise of         Principal Amount of       following such           Trustee or
Date Made         over-allotment option    this Global Security      decrease or increase     Securities Custodian
- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================
<S>               <C>                      <C>                       <C>                      <C>
- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================

- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================

- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================

- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================

- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================

- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================

- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================

- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
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- --------------    ---------------------    ---------------------     --------------------     =====================
- --------------    ---------------------    ---------------------     --------------------     =====================

- --------------    ---------------------    ---------------------     --------------------     =====================
</TABLE>

<PAGE>

                     OPTION OF NOTEHOLDER TO ELECT PURCHASE

      If you want to elect to have this Security or a portion thereof
repurchased by the Company pursuant to Section 3.08 or 4.07 of the Indenture,
check the box: |_|

      If the purchase is in part, indicate the portion ($1,000 or any integral
multiple thereof) to be purchased: ____________

      Your Signature: _______________________________________________
      (Sign exactly as your name appears on the other side of this
      Security)

Date: ________________

Medallion Signature Guarantee: _____________________

                               ELECTION TO CONVERT

To DoubleClick Inc.:

      The undersigned owner of this Security hereby irrevocably exercises the
option to convert this Security, or the portion below designated, into Common
Stock of DoubleClick Inc. in accordance with the terms of the Indenture referred
to in this Security, and directs that the shares issuable and deliverable upon
conversion, together with any check in payment for fractional shares, be issued
in the name of and delivered to the undersigned, unless a different name has
been indicated below. If shares are to be issued in the name of a person other
than the undersigned, the undersigned will pay all transfer taxes payable with
respect thereto.

      The undersigned agrees to be bound by the terms of the Registration
Agreement relating to the Common Stock issued upon conversion of the Securities.

      If you want to convert this Security in whole, check the box below. If you
want to convert this Security in part, indicate the portion of this Security to
be converted in the space provided below.

In whole |_|  or    Portion of Security to be converted ($1,000 or any integral
                    multiple thereof):

                            $______________

Date: ________________

                           Your Signature: __________________________
                           (Sign exactly as your name appears on the
                           other side of this Security)

                           Medallion Signature Guarantee:


                           ________________________________

<PAGE>

Please print or typewrite your name and address, including zip code, and social
security or other identifying number:

If the Common Stock is to be issued and delivered to someone other than you,
please print or typewrite the name and address, including zip code, and social
security or other identifying number of that person:

                                    EXHIBIT B

                    FORM OF TRANSFER CERTIFICATE FOR TRANSFER
                   FROM GLOBAL SECURITY OR DEFINITIVE SECURITY
                             TO DEFINITIVE SECURITY
    (Transfers pursuant to S 2.06(a)(ii) or S 2.06(a)(iii) of the Indenture)

The Bank of New York, as Registrar

   Attn: orporate Trust Trustee Administration

   Re: DoubleClick Inc. 4.75% Convertible Subordinated
       Notes due 2006 (the "Securities")

      Reference is hereby made to the Indenture dated as of March 22, 1999 (the
"Indenture") between DoubleClick Inc. and The Bank of New York, as Trustee.
Capitalized terms used but not defined herein shall have the meanings given them
in the Indenture.

      This letter relates to U.S. $             aggregate principal amount of
Securities which are held [in the form of a [Definitive] [Global Security (CUSIP
No. _____________)]* in the name of [name of transferor] (the "Transferor") to
effect the transfer of the Securities.

      In connection with such request, and in respect of such Securities, the
Transferor does hereby certify that such Securities are being transferred (i) in
accordance with the transfer restrictions set forth in the Securities and the
Indenture and (ii) to a transferee that the Transferor reasonably believes is an
institutional "accredited investor" (as defined in Rule 501(a)(1), (2), (3) or
(7) of Regulation D under the U.S. Securities Act of 1933, as amended) (an
"Institutional Accredited Investor") which is acquiring such Securities for its
own account or for one or more accounts, each of which is an Institutional
Accredited Investors, over which it exercises sole investment discretion and
(iii) in accordance with applicable securities laws of any state of the United
States.

            [Name of Transferor],


            By ____________________________
               Name:
               Title:

Dated:

cc:   DoubleClick Inc.

Attn: Secretary

<PAGE>

                                    EXHIBIT C

               FORM OF ACCREDITED INVESTOR TRANSFEREE CERTIFICATE
            (Transfers pursuant to S 2.06(a)(ii) and S 2.06(a)(iii))

The Bank of New York, as Registrar

Attn: Corporate Trust Trustee Administration

      Re:   DoubleClick Inc. 4.75% Convertible Subordinated Notes due 2006 (the
            "Securities")

      Reference is hereby made to the Indenture dated as of March 22, 1999 (the
"Indenture") between DoubleClick Inc., a Delaware corporation (the "Company"),
and The Bank of New York, as Trustee (the "Trustee"). Capitalized terms used but
not defined herein shall have the meanings given them in the Indenture.

      In connection with our proposed purchase of $          aggregate principal
amount of the Securities, which are convertible into shares of common stock
("Common Stock") of the Company, we confirm that:

            1. We understand that the Securities and the Common Stock issuable
      upon conversion thereof have not been registered under the Securities Act
      of 1933, as amended (the "Securities Act"), and may not be sold except as
      permitted in the following sentence. We understand and agree, on our own
      behalf and on behalf of any accounts for which we are acting as
      hereinafter stated, (x) that such Securities are being transferred to us
      in a transaction not involving any public offering within the meaning of
      the Securities Act, (y) that if we should resell, pledge or otherwise
      transfer any such Securities or any shares of Common Stock issuable upon
      conversion thereof prior to the later of (I) the expiration of the holding
      period under Rule 144(k) (or any successor thereto) under the Securities
      Act which is applicable to such Securities or shares of Common Stock, as
      the case may be, or (II) within three months after we cease to be an
      affiliate (within the meaning of Rule 144 under the Securities Act) of the
      Company, such Securities or the Common Stock issuable upon conversion
      thereof may be resold, pledged or transferred only (i) to the Company,
      (ii) so long as such Securities are eligible for resale pursuant to Rule
      144A under the Securities Act ("Rule 144A"), to a person whom we
      reasonably believe is a "qualified institutional buyer" (as defined in
      Rule 144A) ("QIB") that purchases for its own account or for the account
      of a QIB to whom notice is given that the resale, pledge or transfer is
      being made in reliance on Rule 144A (as indicated by the box checked by
      the transferor on the Certificate of Transfer on the reverse of the
      certificate for the Securities), it being understood that the Common Stock
      is not eligible for resale pursuant to Rule 144A, (iii) in an offshore
      transaction (as defined in Regulation S under the Securities Act) in
      accordance with Regulation S under the Securities Act (as indicated by the
      box checked by the transferor on the Certificate of Transfer on the
      reverse of the certificate for the Securities or on a

<PAGE>

      comparable Certificate of Transfer for the Common Stock issuable upon
      conversion thereof), (iv) to an institution that is an "accredited
      investor" as defined in Rule 501 (a) (1), (2), (3) or (7) under the
      Securities Act (an "Institutional Accredited Investor") (as indicated by
      the box checked by the transferor on the Certificate of Transfer on the
      reverse of the certificate for the Securities or on a comparable
      Certificate of Transfer for the Common Stock issuable upon conversion
      thereof) that is acquiring the securities for its own account or for the
      account of one or more other Institutional Accredited Investors over which
      it exercises sole investment discretion and that prior to such transfer,
      delivers a signed letter to the Company and the Trustee (or the transfer
      agent in the case of Common Stock issuable upon conversion thereof)
      certifying that it and each such account is such an Institutional
      Accredited Investor and is acquiring the Securities or the Common Stock
      issuable upon conversion thereof for investment purposes and not for
      distribution and agreeing to the restrictions on transfer of the
      Securities or the Common Stock issuable upon conversion thereof, (v)
      pursuant to an exemption from registration under the Securities Act
      provided by Rule 144 (if applicable) under the Securities Act (as
      indicated by the box checked transferor on the Certificate of Transfer on
      the reverse of the certificate for the Securities or a comparable
      Certificate of Transfer for the Common Stock issuable upon conversion
      thereof), or (vi) pursuant to an effective registration statement under
      the Securities Act, in each case in accordance with any applicable
      securities laws of any state of the United States, and we will notify any
      purchaser of the Securities or the Common Stock issuable upon conversion
      thereof from us of the above resale restrictions, if then applicable. We
      further understand that in connection with any transfer of the Securities
      or the Common Stock issuable upon conversion thereof (other than a
      transfer pursuant to clause (vi) above) by us that the Company and the
      Trustee (or the transfer agent in the case of Common Stock issuable upon
      conversion thereof) may request, and if so requested we will furnish, such
      certificates and other information and, in the case of a transfer pursuant
      to clause (v) above, a legal opinion as they may reasonably require to
      confirm that any such transfer complies with the foregoing restrictions.
      Finally, we understand that in any case we will not directly or indirectly
      engage in any hedging transactions with regard to the Securities or the
      Common Stock issuable upon conversion of the Securities except as
      permitted by the Securities Act.

            2. We are able to fend for ourselves in connection with our purchase
      of the Securities, we have such knowledge and experience in financial and
      business matters as to be capable of evaluating the merits and risks of
      our investment in the Securities, and we and any accounts for which we are
      acting are each able to bear the economic risk of our or its investment
      and can afford the complete loss of such investment.

<PAGE>

            3. We understand that the Company and others will rely upon the
      truth and accuracy of the foregoing acknowledgments, representations,
      agreements and warranties and we agree that if any of the acknowledgments,
      representations, agreements or warranties made or deemed to have been made
      by us by our purchase of the Securities, for our own account or for one or
      more accounts as to each of which we exercise sole investment discretion,
      are no longer accurate, we shall promptly notify the Company.

            4. With respect to the certificates representing Securities we are
      purchasing, we understand that such certificates will be in definitive
      registered form and that the notification requirement referred to in (1)
      above requires that, until the expiration of the holding period with
      respect to sales of the Securities under clause (k) of Rule 144 under the
      Securities Act, that such Securities will bear a legend substantially to
      the following effect:

      "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
AS AMENDED (THE "SECURITIES ACT"). THE HOLDER HEREOF, BY PURCHASING THIS
SECURITY, AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS SECURITY MAY NOT BE
RESOLD, PLEDGED OR OTHERWISE TRANSFERRED (X) PRIOR TO THE EXPIRATION OF THE
HOLDING PERIOD UNDER RULE 144(k) (OR ANY SUCCESSOR THERETO) UNDER THE SECURITIES
ACT WHICH IS APPLICABLE TO THIS SECURITY OR (Y) BY ANY HOLDER THAT WAS AN
"AFFILIATE" (WITHIN THE MEANING OF RULE 144 UNDER THE SECURITIES ACT) OF THE
COMPANY AT ANY TIME DURING THE THREE MONTHS PRECEDING THE DATE OF SUCH TRANSFER,
IN EITHER CASE OTHER THAN (1) TO THE COMPANY, (2) SO LONG AS THIS SECURITY IS
ELIGIBLE FOR RESALE PURSUANT TO RULE 144A UNDER THE SECURITIES ACT ("RULE
144A"), TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED
INSTITUTIONAL BUYER WITHIN THE MEANING OF RULE 144A, PURCHASING FOR ITS OWN
ACCOUNT OR FOR THE ACCOUNT OF A QUALIFIED INSTITUTIONAL BUYER TO WHOM NOTICE IS
GIVEN THAT THE RESALE, PLEDGE OR OTHER TRANSFER IS BEING MADE IN RELIANCE ON
RULE 144A (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE CERTIFICATE
OF TRANSFER ON THE REVERSE OF THIS SECURITY), (3) IN AN OFFSHORE TRANSACTION (AS
DEFINED IN REGULATION S UNDER THE SECURITIES ACT) IN ACCORDANCE WITH REGULATION
S UNDER THE SECURITIES ACT (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON
THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS SECURITY), (4) TO AN
INSTITUTION THAT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501(a)(1), (2),
(3) OR (7) UNDER THE SECURITIES ACT ("INSTITUTIONAL ACCREDITED INVESTOR") (AS
INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON
THE REVERSE OF THIS SECURITY) THAT IS ACQUIRING THIS SECURITY FOR INVESTMENT
PURPOSES AND NOT FOR DISTRIBUTION AND THAT, PRIOR TO SUCH TRANSFER, DELIVERS TO
THE COMPANY AND THE TRUSTEE A SIGNED LETTER CONTAINING CERTAIN REPRESENTATIONS
AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THE SECURITY
EVIDENCED HEREBY (THE FORM OF WHICH LETTER MAY BE OBTAINED FROM THE TRUSTEE),
(5) PURSUANT TO AN EXEMPTION FROM REGISTRATION UNDER THE SECURITIES ACT PROVIDED
BY RULE 144 (IF APPLICABLE) UNDER THE SECURITIES ACT (AS INDICATED BY THE BOX
CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE OF THIS
SECURITY) OR (6) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE
SECURITIES ACT, IN EACH CASE IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS
OF ANY STATE OF THE UNITED STATES. PRIOR TO A TRANSFER OF THIS SECURITY (OTHER
THAN A TRANSFER PURSUANT TO CLAUSE (6) ABOVE), THE HOLDER OF THIS SECURITY MUST,
PRIOR TO SUCH TRANSFER, FURNISH TO THE COMPANY AND THE TRUSTEE SUCH CERTIFICATES
AND OTHER INFORMATION AND, IN THE CASE OF A TRANSFER PURSUANT TO CLAUSE (5)
ABOVE, A LEGAL OPINION AS THEY MAY REASONABLY REQUIRE TO CONFIRM THAT ANY
TRANSFER BY IT OF THIS SECURITY COMPLIES WITH THE FOREGOING RESTRICTIONS. THE
HOLDER HEREOF, BY PURCHASING THIS SECURITY, REPRESENTS AND AGREES FOR THE
BENEFIT OF THE COMPANY THAT

<PAGE>

IT IS (1) A QUALIFIED INSTITUTIONAL BUYER OR (2) AN INSTITUTIONAL ACCREDITED
INVESTOR AND THAT IT IS HOLDING THIS SECURITY FOR INVESTMENT PURPOSES AND NOT
FOR DISTRIBUTION OR (3) NOT A U.S. PERSON AND IS OUTSIDE THE UNITED STATES
WITHIN THE MEANING OF (OR AN ACCOUNT SATISFYING THE REQUIREMENTS OF PARAGRAPH
(k)(2) OF RULE 902 UNDER) REGULATION S UNDER THE SECURITIES ACT. IN ANY CASE THE
HOLDER HEREOF WILL NOT, DIRECTLY OR INDIRECTLY, ENGAGE IN ANY HEDGING
TRANSACTIONS WITH REGARD TO THIS SECURITY OR ANY COMMON STOCK ISSUABLE UPON
CONVERSION OF THIS SECURITY EXCEPT AS PERMITTED BY THE SECURITIES ACT."

            5. With respect to certificates representing shares of Common Stock
      issuable upon conversion of the Securities, we understand that the
      notification requirement referred to in (1) above requires that, until the
      expiration of the holding period with respect to sales of such Common
      Stock under clause (k) of Rule 144 under the Securities Act, such
      certificates will bear a legend substantially to the effect set forth as
      Exhibit D to the Indenture and that a copy of such legend may be obtained
      from the Trustee.

            6. We are acquiring the Securities purchased by us for investment
      purposes, and not for distribution, for our own account or for one or more
      accounts as to each of which we exercise sole investment discretion and we
      are and each such account is an Institutional Accredited Investor.

            7. You and the Company are entitled to rely on this letter and you
      and the Company are irrevocably authorized to produce this letter or a
      copy hereof to any interested party in any administrative or legal
      proceeding or official inquiry with respect to the matters covered hereby.

                     Very truly yours,


                     ________________________________
                     (Name of Purchaser)

                     By: ____________________________

Dated:

cc: DoubleClick Inc.
    Attn: Chief Financial Officer
    41 Madison Avenue, 32nd Floor
    New York, NY 10010

<PAGE>

                                    EXHIBIT D

                     FORM OF RESTRICTED COMMON STOCK LEGEND

      "THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933,
AS AMENDED (THE "SECURITIES ACT"). THE HOLDER HEREOF, BY PURCHASING THIS
SECURITY, AGREES FOR THE BENEFIT OF THE COMPANY THAT THIS SECURITY MAY NOT BE
RESOLD, PLEDGED OR OTHERWISE TRANSFERRED (X) PRIOR TO THE EXPIRATION OF THE
HOLDING PERIOD UNDER RULE 144(k) (OR ANY SUCCESSOR THERETO) UNDER THE SECURITIES
ACT WHICH IS APPLICABLE TO THIS SECURITY OR (Y) BY ANY HOLDER THAT WAS AN
"AFFILIATE" (WITHIN THE MEANING OF RULE 144 UNDER THE SECURITIES ACT) OF THE
COMPANY AT ANY TIME DURING THE THREE MONTHS PRECEDING THE DATE OF SUCH TRANSFER,
IN EITHER CASE, OTHER THAN (1) TO THE COMPANY, (2) IN AN OFFSHORE TRANSACTION
(AS DEFINED IN REGULATION S UNDER THE SECURITIES ACT) IN ACCORDANCE WITH
REGULATION S UNDER THE SECURITIES ACT (AS INDICATED BY THE BOX CHECKED BY THE
TRANSFEROR ON THE CERTIFICATE OF TRANSFER APPLICABLE TO THIS SECURITY, THE FORM
OF WHICH MAY BE OBTAINED FROM THE COMPANY OR THE TRANSFER AGENT), (3) TO AN
INSTITUTION THAT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501(a)(1), (2),
(3) OR (7) UNDER THE SECURITIES ACT ("INSTITUTIONAL ACCREDITED INVESTOR") (AS
INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER
APPLICABLE TO THIS SECURITY, THE FORM OF WHICH MAY BE OBTAINED FROM THE COMPANY
OR THE TRANSFER AGENT) THAT IS ACQUIRING THIS SECURITY FOR INVESTMENT PURPOSES
AND NOT FOR DISTRIBUTION, AND THAT, PRIOR TO SUCH TRANSFER, DELIVERS TO THE
COMPANY AND THE TRANSFER AGENT A SIGNED LETTER CONTAINING CERTAIN
REPRESENTATIONS AND AGREEMENTS RELATING TO THE RESTRICTIONS ON TRANSFER OF THE
SECURITY EVIDENCED HEREBY (THE FORM OF WHICH LETTER MAY BE OBTAINED FROM THE
COMPANY OR THE TRANSFER AGENT), (4) PURSUANT TO AN EXEMPTION FROM REGISTRATION
UNDER THE SECURITIES ACT PROVIDED BY RULE 144 (IF APPLICABLE) UNDER THE
SECURITIES ACT (AS INDICATED BY THE BOX CHECKED BY THE TRANSFEROR ON THE
CERTIFICATE OF TRANSFER APPLICABLE TO THIS SECURITY, THE FORM OF WHICH MAY BE
OBTAINED FROM THE COMPANY OR THE TRANSFER AGENT) OR (5) PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT UNDER THE SECURITIES ACT, IN EACH CASE IN ACCORDANCE WITH
ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES. PRIOR TO A
TRANSFER OF THIS SECURITY (OTHER THAN A TRANSFER PURSUANT TO CLAUSE (5) ABOVE),
THE HOLDER OF THIS SECURITY MUST, PRIOR TO SUCH TRANSFER, FURNISH TO THE COMPANY
AND THE TRANSFER AGENT SUCH CERTIFICATES AND OTHER INFORMATION AND, IN THE CASE
OF A TRANSFER PURSUANT TO CLAUSE (4) ABOVE, A LEGAL OPINION AS THEY MAY
REASONABLY REQUIRE TO CONFIRM THAT ANY TRANSFER BY IT OF THIS SECURITY COMPLIES
WITH THE FOREGOING RESTRICTIONS. THE HOLDER HEREOF, BY PURCHASING THIS SECURITY,
REPRESENTS AND AGREES FOR THE BENEFIT OF THE COMPANY THAT IT IS (1) AN
INSTITUTION THAT IS AN "ACCREDITED INVESTOR" AS DEFINED IN RULE 501(a)(1), (2),
(3) OR (7) UNDER THE SECURITIES ACT AND THAT IT IS HOLDING THIS SECURITY FOR
INVESTMENT PURPOSES AND NOT FOR DISTRIBUTION OR (2) NOT A U.S. PERSON AND IS
OUTSIDE THE UNITED STATES WITHIN THE MEANING OF (OR AN ACCOUNT SATISFYING THE
REQUIREMENTS OF PARAGRAPH (k)(2) OF RULE 902 UNDER) REGULATION S UNDER THE
SECURITIES ACT. IN ANY CASE THE HOLDER HEREOF WILL NOT, DIRECTLY OR INDIRECTLY,
ENGAGE IN ANY HEDGING TRANSACTION WITH REGARD TO THIS SECURITY EXCEPT AS
PERMITTED BY THE SECURITIES ACT."

<PAGE>

                                    EXHIBIT E

                    FORM OF TRANSFER CERTIFICATE FOR TRANSFER
                           OF RESTRICTED COMMON STOCK
               (Transfers pursuant to S 5.16(c) of the Indenture)

[Name and Address of Common Stock Transfer Agent]

      Re:   DoubleClick Inc. 4.75% Convertible Subordinated Notes due 2006 (the
            "Securities")

      Reference is hereby made to the Indenture dated as of March 22, 1999 (the
"Indenture") between DoubleClick Inc. and The Bank of New York, as Trustee.
Capitalized terms used but not defined herein shall have the meanings given them
in the Indenture.

      This letter relates to _________ shares of Common Stock represented by the
accompanying certificate(s) that were issued upon conversion of Securities and
which are held in the name of [name of transferor] (the "Transferor") to effect
the transfer of such Common Stock.

      In connection with the transfer of such shares of Common Stock, the
undersigned confirms that such shares of Common Stock are being transferred:

CHECK ONE BOX BELOW

            (1)   |_|   to the Company; or

            (2)   |_|   pursuant to and in compliance with Regulation S under
                        the Securities Act of 1933; or

            (3)   |_|   to an institutional "accredited investor" (as defined in
                        Rule 501(a)(1), (2), (3) or (7) under the Securities Act
                        of 1933) that has furnished to the transfer agent a
                        signed letter containing certain representations and
                        agreements (the form of which letter can be obtained
                        from the Company or transfer agent); or

            (4)   |_|   pursuant to an exemption from registration under the
                        Securities Act of 1933 provided by Rule 144 thereunder.

            Unless one of the boxes is checked, the transfer agent will refuse
            to register any of the Common Stock evidenced by this certificate in
            the name of any person other than the registered holder thereof;
            provided, however, that if box (2), (3) or (4) is checked, the
            transfer agent may require, prior to registering any such transfer
            of the Common Stock such certifications and other information, and
            if box (4) is checked such legal opinions, as the Company has
            reasonably requested in writing, by delivery to the transfer agent
            of a standing letter of instruction, to

<PAGE>

            confirm that such transfer is being made pursuant to an exemption
            from, or in a transaction not subject to, the registration
            requirements of the Securities Act of 1933.

            [Name of Transferor],


            By _____________________________
               Name:
               Title:

Dated:

cc:   DoubleClick Inc.

Attn: Secretary

*     Applicable to Global Securities only.

**    Applicable to Definitive Securities only.

*     Insert, if appropriate.




                                DoubleClick Inc.

                  4.75% Convertible Subordinated Notes due 2006

                             REGISTRATION AGREEMENT

                               New York, New York
                                 March 22, 1999

Salomon Smith Barney Inc.
BT Alex. Brown Incorporated
Donaldson, Lufkin & Jenrette Securities Corporation

As Representatives of the Initial Purchasers Named in
  Schedule I to the Purchase Agreement (as defined below)
388 Greenwich Street
New York, New York 10013

Ladies and Gentlemen:

      DoubleClick Inc., a Delaware corporation (the "Company"), proposes to
issue and sell (such issuance and sale, the "Initial Placement") to the several
parties named in Schedule I to the Purchase Agreement (the "Initial Purchasers")
for whom you (the "Representatives") are acting as representatives, upon the
terms set forth in a purchase agreement dated March 17, 1999 (the "Purchase
Agreement"), $200,000,000 aggregate principal amount (plus up to an additional
$50,000,000 aggregate principal amount to cover over-allotments, if any) of its
4.75% Convertible Subordinated Notes due 2006 (the "Securities"). The Securities
will be convertible into shares of common stock, par value $.001 per share, of
the Company at the conversion price set forth in the Offering Memorandum (as
defined herein), as the same may be adjusted from time to time pursuant to the
Indenture referred to below. As an inducement to you to enter into the Purchase
Agreement and in satisfaction of a condition to your obligations thereunder, the
Company agrees with you, (i) for your benefit and (ii) for the benefit of the
holders from time to time of the Securities and the Common Stock issuable upon
conversion of the Securities (including you), as follows:

1. Definitions. Capitalized terms used herein without definition shall have the
respective meanings set forth in the Purchase Agreement. As used in this
Agreement, the following capitalized terms shall have the following meanings:

      "Act" means the Securities Act of 1933, as amended, and the rules and
regulations of the SEC promulgated thereunder.

      "Affiliate" of any specified person means any other person, directly or
indirectly, controlling or controlled by or under direct or indirect common
control with such specified person. For the purposes of this definition,
"control" (including, with correlative meanings, the terms "controlling",
"controlled by" and "under common control with"), as used with respect to any
person, shall mean the possession, directly or indirectly, of the power to
direct or cause the direction of the management or policies of such person,
whether through the ownership of voting securities or by agreement or otherwise.

      "Business Day" has the meaning set forth in the Indenture.

      "Closing Date" means March 22, 1999.

      "Common Stock" means the common stock, par value $.001 per share, of the
Company, as it exists on the date of this Agreement and any other shares of
capital stock or other securities of the Company into which such Common Stock
may be reclassified or changed, together with any and all other securities which
may from time to time be issuable upon conversion of Securities.

      "Damages Payment Date" means, with respect to the Securities or the Common
Stock issuable upon conversion thereof, as applicable, each Interest Payment
Date; and in the event that any Security, or portion thereof, is called for
redemption or surrendered for purchase by the Company and not withdrawn pursuant
to a Designated Event Offer (as defined in the Indenture), the relevant
redemption date or Designated Event Payment Date (as defined in the Indenture),
as the case may be, shall also be a Damages Payment Date with respect to such
Security, or portion thereof, unless the Indenture provides that accrued and
unpaid interest on the Security (or portion thereof) to be redeemed or
repurchased, as the case may be, is to be paid to the person who was the Holder
thereof on a record date prior to such redemption date or Designated Event
Payment Date, as the case may be, in which case the Damages Payment Date shall
be the date on which interest is payable to such Record Holder.

      "Default Rate" has the meaning set forth in the Indenture.

      "DTC" has the meaning set forth in Section 3(k) hereof.

      "Exchange Act" means the Securities Exchange Act of 1934, as amended, and
the rules and regulations of the SEC promulgated thereunder.

      "Final Maturity Date" means March 15, 2006.

      "Holder" means a person who is a holder or beneficial owner (including the
Initial Purchasers) of any Securities or shares of Common Stock issued upon
conversion of Securities; provided that, unless otherwise expressly stated
herein, only registered
<PAGE>

holders of Securities or Common Stock issued on conversion thereof shall be
counted for purposes of calculating any proportion of holders entitled to take
any action or give notice pursuant to this Agreement.

      "Indenture" means the Indenture relating to the Securities dated as of
March 22, 1999, between the Company and The Bank of New York, as trustee, as the
same may be amended from time to time in accordance with the terms thereof.

      "Initial Placement" has the meaning set forth in the preamble hereto.

      "Initial Purchasers" has the meaning set forth in the preamble hereto.

      "Interest Payment Date" shall mean each March 15and September 15.

      "Liquidated Damages" has the meaning set forth in Section 2(e) hereof.

      "Majority Holders" means the Holders of a majority of the then outstanding
aggregate principal amount of Securities registered under a Shelf Registration
Statement; provided that Holders of Common Stock issued upon conversion of
Securities shall be deemed to be Holders of the aggregate principal amount of
Securities from which such Common Stock was converted; and provided, further,
that Securities or Common Stock which have been sold or otherwise transferred
pursuant to the Shelf Registration Statement shall not be included in the
calculation of Majority Holders.

      "Majority Underwriting Holders" means, with respect to any Underwritten
Offering, the Holders of a majority of the then outstanding aggregate principal
amount of Securities registered under any Shelf Registration Statement whose
Securities are or are to be included in such Underwritten Offering; provided
that Holders of Common Stock issued upon conversion of Securities should be
deemed to be Holders of the aggregate principal amount of Securities from which
such Common Stock was converted.

      "Managing Underwriters" means the Underwriter or Underwriters that shall
administer an Underwritten Offering.

      "NASD" has the meaning set forth in Section 3(i) hereof.

      "Notice and Questionnaire" means a Notice of Registration Statement and
Selling Securityholder Questionnaire substantially in the form of Exhibit A
hereto.

      "Offering Memorandum" means the Final Memorandum as defined in the
Purchase Agreement.

      "Person" and "person" have the meaning set forth in the Indenture.

      "Prospectus" means the prospectus included in any Shelf Registration
Statement (including, without limitation, a prospectus that discloses
information previously omitted from a prospectus filed as part of an effective
registration statement in reliance upon Rule 430A under the Act), as amended or
supplemented by any prospectus supplement, with respect to the terms of the
offering of any portion of the Securities or Common Stock issuable upon
conversion thereof covered by such Shelf Registration Statement, and all
amendments and supplements to such prospectus, including all documents
incorporated or deemed to be incorporated by reference in such prospectus.

      "Purchase Agreement" has the meaning set forth in the preamble hereto.

      "Record Holder" means (i) with respect to any Damages Payment Date which
occurs on an Interest Payment Date, each person who is registered on the books
of the registrar as the holder of Securities at the close of business on the
record date with respect to such Interest Payment Date and (ii) with respect to
any Damages Payment Date relating to the Common Stock issued upon conversion
thereof, each person who is a holder of record of such Common Stock fifteen days
prior to the Damages Payment Date.

      "Registration Default" has the meaning set forth in Section 2(e) hereof.
<PAGE>

      "Representatives" has the meaning set forth in the preamble thereto.

      "Rule 144" means Rule 144 (or any successor provision) under the Act.

      "SEC" means the Securities and Exchange Commission.

      "Securities" has the meaning set forth in the preamble hereto.

      "Shelf Registration" means a registration effected pursuant to Section 2
hereof.

      "Shelf Registration Period" has the meaning set forth in Section 2(c)
hereof.

      "Shelf Registration Statement" means a "shelf" registration statement of
the Company pursuant to the provisions of Section 2 hereof which covers all of
the Securities and the Common Stock issuable upon conversion thereof, as
applicable, on Form S-3 or on another appropriate form for an offering to be
made on a delayed or continuous basis pursuant to Rule 415 under the Act, or any
similar rule that may be adopted by the SEC, and all amendments and supplements
to such registration statement, including post-effective amendments, in each
case including the Prospectus contained therein, all exhibits thereto and all
documents incorporated or deemed to be incorporated by reference therein.

      "Stock Split" has the meaning set forth in the Indenture.

      "Suspension Period" has the meaning set forth in Section 2(d) hereof.

      "Transfer Restricted Securities" means each Security and each share of
Common Stock issued upon conversion thereof until the earlier of (A) date on
which such Security or share of Common Stock, as the case may be, (i) has been
transferred pursuant to the Shelf Registration Statement or another registration
statement covering such Security or share of Common Stock which has been filed
with the SEC pursuant to the Act, in either case after such registration
statement has become effective and while such registration statement is
effective under the Act, (ii) has been transferred pursuant to Rule 144 under
the Act (or any similar provision then in force), or (iii) may be sold or
transferred pursuant to Rule 144(k) under the Act (or any successor provision
then in force), or (B) that is the second anniversary of the Closing Date or, if
later, the second anniversary of the last date on which any Securities are
issued upon exercise of the Initial Purchasers' over-allotment option.

      "Trustee" means the trustee with respect to the Securities under the
Indenture.

      "Underwriter" means any underwriter of Securities or Common Stock issuable
upon conversion thereof in connection with an offering thereof under a Shelf
Registration Statement.

      "Underwritten Offering" means an offering in which the Securities or
Common Stock issued upon conversion thereof are sold to an Underwriter or with
the assistance of an Underwriter for reoffering to the public.

      All references in this Agreement to financial statements and schedules and
other information which is "contained", "included", or "stated" in the Shelf
Registration Statement, any preliminary Prospectus or Prospectus (and all other
references of like import) shall be deemed to mean and include all such
financial statements and schedules and other information which is incorporated
or deemed to be incorporated by reference in such Shelf Registration Statement,
preliminary Prospectus or Prospectus, as the case may be; and all references in
this Agreement to amendments or supplements to the Shelf Registration Statement,
any preliminary Prospectus or Prospectus shall be deemed to mean and include the
filing of any document under the Exchange Act, after the date of such Shelf
Registration Statement, preliminary Prospectus or Prospectus, as the case may
be, which is incorporated or deemed to be incorporated by reference therein.

2. Shelf Registration Statement.

(a) The Company shall prepare and, not later than 60 days following the Closing
Date, shall file with the SEC a Shelf Registration Statement with respect to
resales of the Securities and the Common Stock issuable upon conversion thereof
by the Holders from time to time in accordance with the methods of distribution
elected by such Holders and set forth in such Shelf Registration Statement and
thereafter shall use its reasonable best efforts to cause such Shelf
Registration Statement to be declared effective under the Act within 150 days
after the Closing Date;
<PAGE>

provided that if any Securities are issued upon exercise of the over-allotment
option granted to the Initial Purchasers in the Purchase Agreement and the date
on which such Securities are issued occurs after the Closing Date, the Company
will take such steps, prior to the effective date of the Shelf Registration
Statement, to ensure that such Securities and Common Stock issuable upon
conversion thereof are included in the Shelf Registration Statement on the same
terms as the Securities issued on the Closing Date. The Company shall supplement
or amend the Shelf Registration Statement if required by the rules, regulations
or instructions applicable to the registration form used by the Company for the
Shelf Registration Statement, if required by the Act, the Exchange Act or the
SEC.

            (b) (1) Not less than 30 calendar days prior to the effectiveness of
      the Shelf Registration Statement, the Company shall mail the Notice and
      Questionnaire to the Holders of Securities and Common Stock issued upon
      conversion thereof. No Holder shall be entitled to be named as a selling
      securityholder in the Shelf Registration Statement, and no Holder shall be
      entitled to use the Prospectus forming a part thereof for resales of
      Securities or Common Stock issued upon conversion thereof at any time,
      unless such Holder has returned a completed and signed Notice and
      Questionnaire to the Company by the deadline for responses set forth
      therein; provided, however, that Holders of Securities or Common Stock
      issued upon conversion thereof shall have at least 20 calendar days from
      the date on which the Notice and Questionnaire is first mailed to such
      Holders to return a completed and signed Notice and Questionnaire to the
      Company.

            (2) After the Shelf Registration Statement has become effective, the
      Company shall, upon the request of any Holder of Securities or Common
      Stock issued or issuable upon conversion thereof that has not returned a
      completed Notice and Questionnaire, promptly send a Notice and
      Questionnaire to such Holder. The Company shall not be required to take
      any action to name such Holder as a selling securityholder in the Shelf
      Registration Statement or to enable such Holder to use the Prospectus
      forming a part thereof for resales of Securities or Common Stock issued or
      issuable upon conversion thereof until such Holder has returned a
      completed and signed Notice and Questionnaire to the Company, whereupon
      the Company will be required to take such action.

(c) The Company shall keep the Shelf Registration Statement continuously
effective under the Act in order to permit the Prospectus forming part thereof
to be usable by all Holders until the earliest of (i) the second anniversary of
the Closing Date or, if later, the second anniversary of the last date on which
any Securities are issued upon exercise of the Initial Purchasers'
over-allotment option, (ii) the date on which all the Securities and Common
Stock issued or issuable upon conversion thereof may be sold by non-affiliates
("affiliates" for such purpose having the meaning set forth in Rule 144) of the
Company pursuant to paragraph (k) of Rule 144 (or any successor provision)
promulgated by the SEC under the Act, (iii) the date as of which all the
Securities and Common Stock issued or issuable upon conversion thereof have been
transferred pursuant to Rule 144 under the Securities Act (or any similar
provision then in force) and (iv) such date as of which all the Securities and
the Common Stock issued or issuable upon conversion thereof have been sold
pursuant to the Shelf Registration Statement (in any such case, such period
being called the "Shelf Registration Period"). The Company will, subject to
Section 2(d), prepare and file with the SEC such amendments and post-effective
amendments to the Shelf Registration Statement as may be necessary to keep the
Shelf Registration Statement continuously effective for the Shelf Registration
Period; subject to Section 2(d), cause the related Prospectus to be supplemented
by any required supplement, and as so supplemented to be filed pursuant to Rule
424 (or any similar provisions then in force) under the Act; and, comply in all
material respects with the provisions of the Act with respect to the disposition
of all securities covered by the Shelf Registration Statement during the
<PAGE>

applicable period in accordance with the intended methods of disposition by the
sellers thereof set forth in such Shelf Registration Statement as so amended or
such Prospectus as so supplemented.

(d) The Company may suspend the use of the Prospectus for a period not to exceed
30 days in any three-month period or for three periods not to exceed an
aggregate of 90 days in any twelve-month period (the "Suspension Period") for
valid business reasons, to be determined by the Company in its sole reasonable
judgment (not including avoidance of the Company's obligations hereunder),
including, without limitation, the acquisition or divestiture of assets, public
filings with the SEC, pending corporate developments and similar events;
provided that the Company promptly thereafter complies with the requirements of
Section 3(j) hereof, if applicable; provided, that the existence of a Suspension
Period will not prevent the occurrence of a Registration Default or otherwise
limit the obligation of the Company to pay Liquidated Damages. The Company shall
provide notice to the Holders of a Suspension Period as required under Section
3(c)(1)(iv) hereof.

(e) If (i) the Shelf Registration Statement is not filed with the SEC on or
prior to 60 days after the Closing Date, (ii) the Shelf Registration Statement
has not been declared effective by the SEC within 150 days after the Closing
Date, or (iii) the Shelf Registration Statement is filed and declared effective
but shall thereafter cease to be effective (without being succeeded immediately
by a replacement shelf registration statement filed and declared effective) or
usable (including as a result of a Suspension Period) for the offer and sale of
Transfer Restricted Securities for a period of time (including any Suspension
Period) which shall exceed 60 days in the aggregate in any twelve-month period
during the period beginning on the Closing Date and ending on the second
anniversary of the Closing Date or, if later, the second anniversary of the last
date on which any Securities are issued upon exercise of the Initial Purchasers'
over-allotment option (each such event referred to in clauses (i) through (iii),
a "Registration Default"), the Company will pay liquidated damages ("Liquidated
Damages") to each Holder of Transfer Restricted Securities who has complied with
such Holder's obligations under this Agreement. The amount of Liquidated Damages
payable during any period in which a Registration Default has occurred and is
continuing is the amount which is equal to one-quarter of one percent (25 basis
points) per annum per $1,000 principal amount of Securities and $2.50 per annum
per 6.06061 shares of Common Stock (subject to adjustment in the event of a
stock split, stock recombination, stock dividend and the like) constituting
Transfer Restricted Securities for the first 90 days during which a Registration
Default has occurred and is continuing and one-half of one percent (50 basis
points) per annum per $1,000 principal amount of Securities and $5.00 per annum
per 6.06061 shares of Common Stock (subject to adjustment as set forth above)
constituting Transfer Restricted Securities for any additional days during which
a Registration Default has occurred and is continuing; provided that, the
Company hereby agrees that, upon the occurrence of the Stock Split (which it is
currently contemplated will occur on April 2, 1999), the Liquidated Damages
payable in respect of Common Stock shall be automatically adjusted to $2.50 per
annum per 12.12121 shares of Common Stock for the first such 90 days during
which a Registration Default has occurred and is continuing and $5.00 per annum
per 12.12121 shares of Common Stock for any additional days during which such
Registration Default has occurred and is continuing (in each case subject to
further adjustment from time to time in the event of a stock split, stock
recombination, stock dividend and the like), it being understood that all
calculations pursuant to this and the preceding sentence shall be carried out to
five decimals. Following the cure of all Registration Defaults, Liquidated
Damages will cease to accrue with respect to such Registration Default. All
accrued Liquidated Damages shall be paid by wire transfer of immediately
available funds or by federal funds check by the Company on each Damages Payment
Date and Liquidated Damages will be calculated on the basis of a 360-day year
consisting of twelve 30-day months. In the event that any Liquidated Damages are
not paid when due, then to the extent permitted by law, such overdue Liquidated
Damages, if any, shall bear interest until paid at the Default Rate, compounded
semi-annually. The parties hereto agree that the Liquidated Damages provided for
in this Section 2(e) constitute a reasonable estimate of the damages that may be
incurred by Holders by reason of a Registration Default.

(f) All of the Company's obligations (including, without limitation, the
obligation to pay Liquidated Damages) set forth in the preceding paragraph which
are outstanding or exist with respect to any Transfer Restricted Security at the
time such security ceases to be a Transfer Restricted Security shall survive
until such time as all such obligations with respect to such security shall have
been satisfied in full.

(g) Immediately upon the occurrence or the termination of a Registration
Default, the Company shall give the Trustee, in the case of notice with respect
to the Securities, and the transfer and paying agent for the Common Stock, in
the case of notice with respect to Common Stock issued or issuable upon
conversion thereof, notice of such commencement or termination, of the
obligation to pay Liquidated Damages with regard to the Securities and Common
Stock and the amount thereof and of the event giving rise to such commencement
or termination (such notice to be contained in an Officers' Certificate (as such
term is defined in the Indenture)), and prior to receipt of such Officer'
Certificate the Trustee and such transfer and paying agent shall be entitled to
assume that no such commencement or termination has occurred, as the case may
be.
<PAGE>

(h) All Securities which are redeemed, purchased or otherwise acquired by the
Company or any of its subsidiaries or affiliates (as defined in Rule 144 (or any
successor provision) under the Act) prior to the Final Maturity Date shall be
delivered to the Trustee for cancellation and the Company may not hold or resell
such Securities or issue any new Securities to replace any such Securities or
any Securities that any Holder has converted pursuant to the Indenture. All
shares of Common Stock issued upon conversion of the Securities which are
repurchased or otherwise acquired by the Company or any of its subsidiaries or
affiliates (as defined in Rule 144 (or any successor provision) under the Act)
at any time while such shares are "restricted securities" within the meaning of
Rule 144 shall not be resold or otherwise transferred except pursuant to a
registration statement which has been declared effective under the Act.

3. Registration Procedures. In connection with any Shelf Registration Statement,
the following provisions shall apply:

(a) The Company shall furnish to you, prior to the filing thereof with the SEC,
a copy of any Shelf Registration Statement, and each amendment thereof
(excluding amendments caused by the filing by the Company with the SEC of a
report required by the Exchange Act), a copy of any Prospectus, and each
amendment or supplement, if any, to the Prospectus included therein and shall
use its best efforts to reflect in each such document, when so filed with the
SEC, such comments as Salomon Smith Barney Inc. reasonably may propose. Salomon
Smith Barney Inc. shall promptly furnish to the Company any comments it may have
to such documents mentioned in the foregoing sentence.

(b) The Company shall ensure that (i) any Shelf Registration Statement and any
amendment thereto and any Prospectus forming part thereof and any amendment or
supplement thereto comply in all material respects with the Act and the rules
and regulations thereunder, (ii) any Shelf Registration Statement and any
amendment thereto does not, when it becomes effective, contain an untrue
statement of a material fact or omit to state a material fact required to be
stated therein or necessary to make the statements therein not misleading and
(iii) any Prospectus forming part of any Shelf Registration Statement, and any
amendment or supplement to such Prospectus, does not include an untrue statement
of a material fact or omit to state a material fact necessary in order to make
the statements therein, in light of the circumstances under which they were
made, not misleading; provided that the Company makes no representation or
agreement with respect to information with respect to you, any Underwriter or
any Holder required to be included in any Shelf Registration or Prospectus
pursuant to the Act or the rules and regulations thereunder and which
information is included therein in reliance upon and in conformity with
information furnished to the Company in writing by you, any Underwriter or any
such Holder.

            (c) (1) The Company, as promptly as reasonably practicable, shall
      advise you and each Holder that has returned a completed and signed Notice
      and Questionnaire to the Company and, if requested by you or any such
      Holder, confirm such advice in writing:

                  (i) when a Shelf Registration Statement and any amendment
            thereto has been filed with the SEC and when the Shelf Registration
            Statement or any post-effective amendment thereto has become
            effective;

                  (ii) of any request by the SEC for amendments or supplements
            to the Shelf Registration Statement or the Prospectus or for
            additional information;

                  (iii) of the determination by the Company that a
            post-effective amendment to the Shelf Registration Statement would
            be appropriate; and

                  (iv) of the commencement or termination of any Suspension
            Period.
<PAGE>

            (2) The Company shall advise you and each Holder that has returned a
      completed and signed Notice and Questionnaire to the Company and, if
      requested by you or any such Holder, confirm such advice in writing:

                  (i) of the issuance by the SEC of any stop order suspending
            the effectiveness of the Shelf Registration Statement or the
            initiation of any proceedings for that purpose;

                  (ii) of the receipt by the Company of any notification with
            respect to the suspension of the qualification of the Securities
            included in any Shelf Registration Statement for sale in any
            jurisdiction or the initiation or threat of any proceeding for such
            purpose; and

                  (iii) of the suspension of the use of the Prospectus pursuant
            to Section 2(d) hereof or of the happening of any event that
            requires the making of any changes in the Shelf Registration
            Statement or the Prospectus so that, as of such date, the statements
            therein are not misleading and the Shelf Registration Statement or
            the Prospectus, as the case may be, does not include an untrue
            statement of a material fact or omit to state a material fact
            required to be stated therein or necessary to make the statements
            therein (in the case of the Prospectus, in light of the
            circumstances under which they were made) not misleading (which
            advice shall be accompanied by an instruction to suspend the use of
            the Prospectus until the requisite changes have been made).

(d) The Company shall use its reasonable best efforts to obtain the withdrawal
of any order suspending the effectiveness of any Shelf Registration Statement or
the lifting of any suspension of the qualification (or exemption from
qualification) of any of the Securities for offer or sale in any jurisdiction at
the earliest possible time.

(e) The Company shall furnish to each Holder of Securities and the Common Stock
issued upon conversion thereof included within the coverage of any Shelf
Registration Statement, without charge, at least one copy of such Shelf
Registration Statement and any post-effective amendment thereto, including
financial statements and schedules, and, if the Holder so requests in writing,
all exhibits (including those incorporated by reference).

(f) The Company shall, during the Shelf Registration Period, deliver to each
Holder of Securities or the Common Stock issued upon conversion thereof included
within the coverage of any Shelf Registration Statement, without charge, as many
copies of the Prospectus (including each preliminary Prospectus) included in
such Shelf Registration Statement and any amendment or supplement thereto as
such Holder may reasonably request; and, except during the continuance of any
Suspension Period, the Company consents to the use of the Prospectus or any
amendment or supplement thereto by each of the selling Holders in connection
with the offering and sale of the Securities or the Common Stock issued upon
conversion thereof covered by the Prospectus or any amendment or supplement
thereto.

(g) Prior to any offering of Securities or the Common Stock issued upon
conversion thereof pursuant to any Shelf
<PAGE>

Registration Statement, the Company shall register or qualify or cooperate with
the Holders of Securities and the Common Stock issued upon conversion thereof
included therein and their respective counsel in connection with the
registration or qualification (or exemption from such registration or
qualification) of such Securities or Common Stock for offer and sale, as the
case may be, under the securities or blue sky laws of such jurisdictions as any
such Holders reasonably request in writing and do any and all other acts or
things necessary or advisable to enable the offer and sale in such jurisdictions
of the Securities and the Common Stock issued upon conversion thereof covered by
such Shelf Registration Statement; provided, however, that the Company will not
be required to (A) qualify generally to do business in any jurisdiction where it
is not then so qualified or to (B) take any action which would subject it to
general service of process or to taxation in any such jurisdiction where it is
not then so subject.

(h) The Company shall cooperate with the Holders to facilitate the timely
preparation and delivery of certificates representing Securities or the Common
Stock issued upon conversion thereof to be sold pursuant to any Shelf
Registration Statement free of any restrictive legends and in such denominations
and registered in such names as Holders may request prior to sales of Securities
or the Common Stock issued upon conversion thereof pursuant to such Shelf
Registration Statement.

(i) Subject to the exceptions contained in (A) and (B) of subsection (g) hereof,
the Company shall use its best efforts to cause the Securities and Common Stock
issued upon conversion thereof covered by the applicable Shelf Registration
Statement to be registered with or approved by such other federal, state and
local governmental agencies or authorities, and self-regulatory organizations in
the United States as may be necessary to enable the Holders to consummate the
disposition of such Securities and Common Stock issued upon conversion thereof
as contemplated by the Shelf Registration Statement; without limitation to the
foregoing, the Company shall make all filings and provide all such information
as may be required by the National Association of Securities Dealers, Inc. (the
"NASD") in connection with the offering under the Shelf Registration Statement
of the Securities and Common Stock issued upon conversion thereof (including,
without limitation, such as may be required by NASD Rule 2710 or 2720), and
shall cooperate with each Holder in connection with any filings required to be
made with the NASD by such Holder in that regard.

(j) Upon the occurrence of any event contemplated by paragraph 3(c)(2)(iii)
above and subject to Section 3(a) hereof, the Company shall promptly prepare and
file with the SEC a post-effective amendment to any Shelf Registration Statement
or an amendment or supplement to the related Prospectus or any document
incorporated therein by reference or file a document which is incorporated or
deemed to be incorporated by reference in such Shelf Registration Statement or
Prospectus, as the case may be, so that, as thereafter delivered to purchasers
of the Securities or the Common Stock issued upon conversion thereof included
therein, the Shelf Registration Statement and the Prospectus, in each case as
then amended or supplemented, will not include an untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary in order to make the statements therein (in the case of the Prospectus
in light of the circumstances under which they were made) not misleading and in
the case of a post-effective amendment, use its best efforts to cause it to
become effective as promptly as practicable; provided that the Company's
obligations under this paragraph (j) shall be suspended if the Company has
suspended the use of the Prospectus in accordance with Section 2(d) hereof and
given notice of such suspension to Holders, it being understood that the
Company's obligations under this Subsection (j) shall be automatically
reinstated at the end of such Suspension Period.

(k) The Company shall use its reasonable best efforts to cause The Depository
Trust Company ("DTC") on the first Business Day following the effective date of
any Shelf Registration Statement hereunder or as soon as possible thereafter to
remove (i) from any existing CUSIP number assigned to the Securities any
designation indicating that the Securities are ""restricted securities", which
efforts shall include delivery to DTC of a letter executed by the Company
substantially in the form of Exhibit B hereto and (ii) any other stop or
restriction on DTC's system with respect to the Securities. In the event the
Company is unable to cause DTC to take actions described in the immediately
preceding sentence, the Company shall take such actions as Salomon Smith Barney
Inc. may reasonably request to provide, as soon as practicable, a CUSIP number
for the Securities registered under such Shelf Registration Statement and to
cause such CUSIP number to be assigned to such Securities (or to the maximum
aggregate principal amount of the Securities to which such number may be
assigned). Upon compliance with the foregoing requirements of this Section 3(k),
the Company shall provide the Trustee with global certificates for such
Securities in a form eligible for deposit with DTC.

(l) The Company shall use its best efforts to comply with all applicable rules
and regulations of the SEC and shall make generally available to its security
holders as soon as practicable but in any event not later than 15 months after
(i) the effective date of the applicable Shelf Registration Statement, (ii) the
effective date of each post-effective amendment to any Shelf Registration
Statement, and (iii) the date of each filing by the Company with the SEC of an
Annual Report on Form 10-K that is incorporated by reference or deemed to be
incorporated by
<PAGE>

reference in the Shelf Registration Statement, an earnings statement satisfying
the provisions of Section II(a) of the Act and Rule 158 promulgated by the SEC
thereunder.

(m) The Company shall use its best efforts to cause the Indenture to be
qualified under the TIA (as defined in the Indenture) in a timely manner.

(n) The Company shall cause all Common Stock issued or issuable upon conversion
of the Securities to be listed on each securities exchange or quotation system
on which the Common Stock is then listed no later than the date the applicable
Shelf Registration Statement is declared effective and, in connection therewith,
to make such filings as may be required under the Exchange Act and to have such
filings declared effective as and when required thereunder.

(o) The Company may require each Holder of Securities or the Common Stock issued
upon conversion thereof to be sold pursuant to any Shelf Registration Statement
to furnish to the Company such information regarding the Holder and the
distribution of such Securities or Common Stock sought by the Notice and
Questionnaire and such additional information as may, from time to time, be
required by the Act and the rules and regulations promulgated thereunder, and
the obligations of the Company to any Holder hereunder shall be expressly
conditioned on the compliance of such Holder with such request.

(p) The Company shall, if reasonably requested, use its best efforts to promptly
incorporate in a Prospectus supplement or post-effective amendment to a Shelf
Registration Statement (i) such information as the Majority Holders provide or,
if the Securities or Common Stock are being sold in an Underwritten Offering, as
the Managing Underwriters or the Majority Underwriting Holders reasonably agree
should be included therein and provide to the Company in writing for inclusion
in the Shelf Registration Statement or Prospectus, and (ii) such information as
a Holder may provide from time to time to the Company in writing for inclusion
in a Prospectus or any Shelf Registration Statement concerning such Holder and
the distribution of such Holder's Securities and Common Stock and, in either
case, shall make all required filings of such Prospectus supplement or
post-effective amendment as soon as practicable after being notified in writing
of the matters to be incorporated in such Prospectus supplement or
post-effective amendment, provided that the Company shall not be required to
take any action under this Section 3(p) that is not, in the reasonable opinion
of counsel for the Company, in compliance with applicable law.

(q) The Company shall enter into such customary agreements (including
underwriting agreements) and take all other appropriate actions as may be
reasonably requested in order to expedite or facilitate the registration or the
disposition of the Securities or the Common Stock issued or issuable upon
conversion thereof, and in connection therewith, if an underwriting agreement is
entered into, cause the same to contain indemnification and contribution
provisions and procedures no less favorable than those set forth in Section 5
(or such other reasonable and customary provisions and procedures acceptable to
the Majority Underwriting Holders and the Managing Underwriters, if any, with
respect to all parties to be indemnified pursuant to Section 5). The plan of
distribution in the Shelf Registration Statement and the Prospectus included
therein shall permit resales of the Securities or Common Stock issuable upon
conversion thereof to be made by selling security holders through underwriters,
brokers and dealers, and shall also include such other information as Salomon
Smith Barney Inc. may reasonably request.

(r) The Company shall (i) make reasonably available for inspection by the
Holders of Securities and the Common Stock issued upon conversion thereof
registered or to be registered under a Shelf Registration Statement, any
Underwriter participating in any disposition pursuant to such Shelf Registration
Statement, and any attorney, accountant or other agent retained by the Holders
or any such Underwriter all relevant financial and other records, pertinent
corporate documents and properties of the Company and its subsidiaries as is
customary for due diligence examinations in connection with public offerings;
(ii) cause the Company's officers, directors and employees to supply all
relevant information reasonably requested by the Holders or any such
Underwriter, attorney, accountant or agent in connection with any such Shelf
Registration Statement as is customary for similar due diligence examinations;
provided, however, that any information that is designated in writing by the
Company, in its sole discretion, as confidential at the time of delivery of such
information shall be kept confidential by the Holders or any such Underwriter,
attorney, accountant or agent, unless disclosure thereof is made in connection
with a court, administrative or regulatory proceeding or required by law, or
such information has become available to the public generally through the
Company or through a third party without an accompanying obligation of
confidentiality; provided, further, that if the foregoing inspection and
information gathering specified in subsections (i) and (ii) would, in the
Company's reasonable judgment, disrupt the Company's conduct of business, such
inspections and information gathering shall be coordinated on behalf of the
Holders and the other parties entitled thereto by one counsel designated by or
on
<PAGE>

behalf of the Majority Holders (or, in the case of an Underwritten Offering, the
Majority Underwriting Holders and the Managing Underwriters); (iii) make such
representations and warranties to the Holders of Securities and the Common Stock
issued upon conversion thereof registered thereunder and the Underwriters, if
any, in form, substance and scope as are customarily made by issuers to
Underwriters and covering matters including, but not limited to, those set forth
in the Purchase Agreement; (iv) obtain opinions of counsel to the Company and
updates thereof (which counsel and opinions, in form, scope and substance, shall
be reasonably satisfactory to the Managing Underwriters, if any) addressed to
each selling Holder and the Underwriters, if any, covering such matters as are
customarily covered in opinions requested in public offerings; (v) obtain "cold
comfort" letters and updates thereof from the independent certified public
accountants of the Company (and, if necessary, any other independent certified
public accountants of any subsidiary of the Company or of any business acquired
by the Company for which financial statements and financial data are, or are
required to be, included in the Shelf Registration Statement), addressed to each
selling Holder of Securities and Common Stock issued upon conversion thereof
registered thereunder (provided such Holder furnishes the accountants with such
representations as the accountants customarily require in similar situations)
and the Underwriters, if any, in customary form and covering matters of the type
customarily covered in "cold comfort" letters in connection with primary
underwritten offerings; and (vi) deliver such documents and certificates as may
be reasonably requested by the Majority Holders or, in the case of an
Underwritten Offering, the Majority Underwriting Holders, and the Managing
Underwriters, if any, including those to evidence compliance with Section 3(j)
and with any customary conditions contained in the underwriting agreement or
other agreement entered into by the Company. The foregoing actions set forth in
clauses (iii), (iv), (v) and (vi) of this Section 3(r) shall be performed at (A)
the effectiveness of such Shelf Registration Statement and each post-effective
amendment thereto and (B) each closing under any underwriting or similar
agreement as and to the extent required thereunder.

(s) Each Holder agrees that, upon receipt of notice of the happening of an event
described in Sections 3(c)(1)(ii) through and including 3(c)(1)(iv) and Sections
3(c)(2)(i) through and including 3(c)(2)(iii), each Holder shall forthwith
discontinue (and shall cause its agents and representatives to discontinue)
disposition of the Securities and the Common Stock issuable upon conversion
thereof and will not resume disposition of such Securities or the Common Stock
until such Holder has received copies of an amended or supplemented Prospectus
contemplated by Section 3(j) hereof, or until such Holder is advised in writing
by the Company that the use of the Prospectus may be resumed or that the
relevant Suspension Period has been terminated, as the case may be, provided
that, the foregoing shall not prevent the sale, transfer or other disposition of
Securities or Common Stock issuable upon conversion thereof by a Holder in a
transaction which is exempt from, or not subject to, the registration
requirements of the Act, so long as such Holder does not and is not required to
deliver the applicable Prospectus or Shelf Registration Statement in connection
with such sale, transfer or other disposition, as the case may be; and provided,
further, that the provisions of this paragraph (s) shall not prevent the
occurrence of a Registration Default or otherwise limit the obligation of the
Company to pay Liquidated Damages.

(t) Anything herein to contrary notwithstanding, the Company will not be
required to pay the costs and expenses of, or to participate in the marketing or
"road show" presentations of, more than one Underwritten Offering initiated at
the request of the Holders of Securities or shares of Common Stock issued or
issuable upon conversion thereof, or to effect more than one Underwritten
Offering at the request of such Holders. The Company will not be required to pay
the costs and expenses of, or to participate in the marketing or "road show"
presentations of, an Underwritten Offering unless Holders of at least the
Minimum Amount (as defined below) of Securities and/or Common Stock issued or
issuable on conversion thereof have requested that such Securities and/or shares
of Common Stock be included in such an Underwritten Offering. For purposes of
this Agreement, the "Minimum Amount" means 25% of the aggregate principal amount
of Securities originally issued under the Indenture; provided that, for purposes
of computing the Minimum Amount, Holders of Common Stock issued upon conversion
of Securities shall be deemed to be holders of the aggregate principal amount of
Securities which were converted into those shares of Common Stock. Only Holders
of Securities or shares of Common Stock issued or issuable upon conversion
thereof which are Transfer Restricted Securities shall be entitled to include
such Securities or shares of Common Stock in an Underwritten Offering and only
Transfer Restricted Securities shall be included in the computation of the
Minimum Amount. The Underwritten Offering initiated by Holders as aforesaid
shall include both Securities and Common Stock if so requested by the Holders.
Upon receipt by the Company, from Holders of at least the Minimum Amount of
Securities and/or Common Stock issued or issuable upon conversion thereof, of a
request for an Underwritten Offering, the Company will, within 10 days
thereafter, mail notice to all Holders of Securities and shares of Common Stock
issued upon conversion/hereof stating that: (i) the Company has received a
request from the Holders of the requisite amount of Securities and/or Common
Stock issued or issuable on conversion thereof to effect an Underwritten
Offering on behalf of such Holders; (ii) under the terms of this Agreement, all
Holders of Securities and shares of Common Stock issued or issuable upon
conversion thereof which are Transfer Restricted Securities may include their
Securities and shares of Common Stock in such Underwritten Offering, subject to
the terms and conditions set forth in this Agreement and subject to the right of
the Managing Underwriters to reduce, in light of market conditions and other
similar factors, the aggregate principal amount of Securities and number of
shares of Common Stock included in such Underwritten Offering; (iii) all Holders
electing to include Securities or shares of Common Stock in such
<PAGE>

Underwritten Offering must notify the Company in writing of such election (the
"Election"), and setting forth an address and facsimile number to which such
written elections may be sent and the deadline (which shall be 12:00 midnight on
the 30th calendar day after such notice is mailed to Holders or, if not a
Business Day, the next succeeding Business Day (the "Deadline")) by which such
elections must be received by the Company; and (iv) setting forth such other
instructions as shall be necessary to enable Holders to include their Securities
and shares of Common Stock in such Underwritten Offering. No Holder shall be
entitled to participate in an Underwritten Offering unless such Holder notifies
the Company of such Election by the Deadline. Notwithstanding anything to the
contrary contained herein, if the Managing Underwriters for an Underwritten
Offering to be effected pursuant to this Section 3(t) advise the Holders of the
Securities and shares of the Common Stock to be included in such Underwritten
Offering that, because of aggregate principal amount of Securities and/or number
of shares of Common Stock that such Holders have requested be included in the
Underwritten Offering, the success of the offering would likely be materially
adversely affected by the inclusion of all of the Securities and shares of
Common Stock requested to be included, then the principal amount of Securities
and the number of shares of Common Stock to be offered for the accounts of
Holders shall be reduced pro rata, according to the aggregate principal amount
of Securities and number of shares of Common Stock, respectively, requested for
inclusion by each such Holder, to the extent necessary to reduce the size of the
offering to the size recommended by the Managing Underwriter. Notwithstanding
anything to the contrary contained herein, neither the Company nor any Person,
other than a Holder of Securities or shares of Common Stock issued or issuable
upon conversion thereof and only with respect to its Transfer Restricted
Securities, shall be entitled to include any securities in the Underwritten
Offering.

4. Registration Expenses. The Company shall bear all expenses incurred in
connection with the performance of its obligations under Sections 2 and 3 hereof
and shall reimburse the Holders for the reasonable fees and disbursements of one
firm or counsel designated by the Majority Holders to act as counsel for the
Holders in connection therewith. Notwithstanding the provisions of this Section
4, each Holder shall bear the expense of any broker's commission, agency fee or
Underwriter's discount or commission.

5. Indemnification and Contribution.

            (a) (i) The Company agrees to indemnify and hold harmless each
      Holder of Securities and each Holder of Common Stock issued upon
      conversion thereof covered by any Shelf Registration Statement (including
      the Initial Purchasers), the directors, officers, employees and agents of
      each such Holder and each person who controls any such Holder within the
      meaning of either the Act or the Exchange Act against any and all losses,
      claims, damages or liabilities, joint or several, to which they or any of
      them may become subject under the Act, the Exchange Act or other Federal
      or state law or regulation, at common law or otherwise, insofar as such
      losses, claims, damages or liabilities (or actions in respect thereof)
      arise out of or are based upon any untrue statement or alleged untrue
      statement of a material fact contained in the Shelf Registration Statement
      as originally filed or in any amendment thereof, or in any preliminary
      Prospectus or Prospectus, or in any amendment thereof or supplement
      thereto, or arise out of or are based upon the omission or alleged
      omission to state therein a material fact required to be stated therein or
      necessary to make the statements therein, in the light of the
      circumstances under which they were made, not misleading, and agrees to
      reimburse each such indemnified party, as incurred, for any legal or other
      expenses reasonably incurred by any of them in connection with
      investigating or defending any such loss, claim, damage, liability or
      action;
<PAGE>

      provided, however, that the Company will not be liable in any such case to
      the extent that any such loss, claim, damage or liability arises out of or
      is based upon (A) any such untrue statement or alleged untrue statement or
      omission or alleged omission made therein in reliance upon and in
      conformity with written information furnished to the Company by or on
      behalf of any such Holder or any Initial Purchaser specifically for
      inclusion therein, (B) use of a Shelf Registration Statement or the
      related Prospectus during a period when a stop order has been issued in
      respect of such Shelf Registration or any proceedings for that purpose
      have been initiated or use of a Prospectus when use of such Prospectus has
      been suspended pursuant to Section 2(d) or Section 3(s); provided,
      further, in each case, that Holders received prior notice of such stop
      order, initiation of proceedings or suspension, or (C) if the Holder fails
      to deliver a Prospectus, as then amended or supplemented, provided that
      the Company shall have delivered to such Holder such Prospectus, as then
      amended or supplemented. This indemnity agreement will be in addition to
      any liability which the Company may otherwise have.

            (ii) The Company also agrees to indemnify and to contribute to
      Losses, as provided in Section 5(d), of any Underwriters of Securities or
      Common Stock issued upon conversion thereof registered under a Shelf
      Registration Statement, their officers and directors and each person who
      controls any such Underwriter within the meaning of either the Act or the
      Exchange Act on substantially the same basis as that of the
      indemnification of the Initial Purchasers and the selling Holders provided
      in this Section 5(a) and shall, if requested by any Holder, enter into an
      underwriting agreement reflecting such agreement, as provided in Section
      3(q) hereof. This indemnity agreement will be in addition to any liability
      which the Company may otherwise have.

(b) Each Holder of Securities or Common Stock issued upon conversion thereof
covered by a Shelf Registration Statement (including the Initial Purchasers)
severally and not jointly agrees to indemnify and hold harmless (i) the Company,
(ii) each of its directors, (iii) each of its officers who signs such Shelf
Registration Statement and (iv) each person who controls the Company within the
meaning of either the Act or the Exchange Act to the same extent as the
foregoing indemnity from the Company to each such Holder, but only with
reference to written information relating to such Holder furnished to the
Company by or on behalf of such Holder specifically for inclusion in the
documents referred to in the foregoing indemnity. This indemnity agreement will
be in addition to any liability which any such Holder may otherwise have.

(c) Promptly after receipt by an indemnified party under this Section 5 of
notice of the commencement of any action, such indemnified party will, if a
claim in respect thereof is to be made against the indemnifying party under this
Section 5, notify the indemnifying party in writing of the commencement thereof;
but the failure so to notify the indemnifying party (i) will not relieve it from
liability under paragraph (a) or (b) above unless and to the extent it did not
otherwise learn of such action and such failure results in the forfeiture by the
indemnifying party
<PAGE>

of substantial rights and defenses; and (ii) will not, in any event, relieve the
indemnifying party from any obligations to any indemnified party other than the
indemnification obligation provided in paragraph (a) or (b) above. The
indemnifying party shall be entitled to appoint counsel of the indemnifying
party's choice at the indemnifying party's expense to represent the indemnified
party in any action for which indemnification is sought (in which case the
indemnifying party shall not thereafter be responsible for the fees and expenses
of any separate counsel retained by the indemnified party or parties except as
set forth below); provided, however, that such counsel shall be reasonably
satisfactory to the indemnified party. Notwithstanding the indemnifying party's
election to appoint counsel to represent the indemnified party in an action, the
indemnified party shall have the right to employ separate counsel (including
local counsel), and the indemnifying party shall bear the reasonable fees, costs
and expenses of such separate counsel (and local counsel) if (i) the use of
counsel chosen by the indemnifying party to represent the indemnified party
would present such counsel with a conflict of interest; (ii) the actual or
potential defendants in, or targets of, any such action include both the
indemnified party and the indemnifying party and the indemnified party shall
have reasonably concluded that there may be legal defenses available to it
and/or other indemnified parties which are different from or additional to those
available to the indemnifying party; (iii) the indemnifying party shall not have
employed counsel satisfactory to the indemnified party to represent the
indemnified party within a reasonable time after notice of the institution of
such action; or (iv) the indemnifying party shall authorize the indemnified
party to employ separate counsel at the expense of the indemnifying party.
Notwithstanding the foregoing, the Company shall not, in the connection with any
one action or proceeding or separate but substantially similar or related
actions or proceedings in the same jurisdiction arising out of the same general
allegations or circumstances, be liable for the reasonable fees and expenses of
more than one separate counsel (in addition to one separate local counsel) at
any time for the indemnified parties, which firm or firms (including any local
counsel) shall be designated by Salomon Smith Barney Inc. An indemnifying party
will not, without the prior written consent of the indemnified party, which
consent will not be unreasonably withheld, settle or compromise or consent to
the entry of any judgment with respect to any pending or threatened claim,
action, suit or proceeding in respect of which indemnification or contribution
may be sought hereunder (whether or not the indemnified parties are actual or
potential parties to such claim or action) unless such settlement, compromise or
consent includes an unconditional release of such indemnified party from all
liability arising out of such claim, action, suit or proceeding. The Company
shall not be liable for any losses, claims, damages or liabilities by reason of
any settlement of any action or proceeding effected without the Company's prior
written consent, which consent will not be unreasonably withheld.

(d) In the event that the indemnity provided in paragraph (a) or (b) of this
Section 5 is unavailable to or insufficient to hold harmless an indemnified
party for any reason, then each applicable indemnifying party, in lieu of
indemnifying such indemnified party, shall have an obligation to contribute to
the aggregate losses, claims, damages and liabilities (including legal or other
expenses reasonably incurred in connection with investigating or defending same)
(collectively "Losses"), as incurred, to which such indemnified party may be
subject in such proportion as is appropriate to reflect the relative benefits
received by such indemnifying party, on the one hand, and such indemnified
party, on the other hand, from the Initial Placement and the Shelf Registration
Statement which resulted in such Losses; provided, however, that in no case
shall the Initial Purchasers be responsible, in the aggregate, for any amount in
excess of the purchase discount or commission applicable to the Securities, as
set forth on the cover page of the Offering Memorandum, nor shall any
Underwriter be responsible for any amount in excess of the underwriting discount
or commission applicable to the Securities and Common Stock issued upon
conversion thereof purchased by such Underwriter under the Shelf Registration
Statement which resulted in such Losses. If the allocation provided by the
immediately preceding sentence is unavailable for any reason, the indemnifying
party and the indemnified party shall contribute in such proportion as is
appropriate to reflect not only such relative benefits but also the relative
fault of such indemnifying party, on the one hand, and such indemnified party,
on the other hand, in connection with the statements or omissions which resulted
in such Losses as well as any other relevant equitable considerations. Benefits
received by the Company shall be deemed to be equal to the sum of (x) the total
net proceeds from the Initial Placement (before deducting expenses) as set forth
on the cover page of the Offering Memorandum and (y) the total amount of
Liquidated Damages that the Company was not required to pay as a result of
registering the Securities and Common Stock issued upon conversion thereof
covered by the Shelf Registration Statement which resulted in such Losses.
Benefits received by the Initial Purchasers shall be deemed to be equal to the
total purchase discounts and commissions as set forth on the cover page of the
Offering Memorandum, and benefits received by any other Holders shall be deemed
to be equal to the value of receiving Securities or the Common Stock issuable
upon conversion thereof registered under the Act. Benefits received by any
Underwriter shall be deemed to be equal to the total underwriting discounts and
commissions, as set forth on the cover page of the Prospectus forming a part of
the Shelf Registration Statement (or the applicable Prospectus supplement) which
resulted in such Losses. Relative fault shall be determined by reference to
whether any untrue statement or omission or alleged untrue statement or omission
relates to information provided by the indemnifying party, on the one hand, or
by the indemnified party, on the other hand. The parties agree that it would not
be just and equitable if contribution were determined by pro rata allocation or
any other method of allocation which does not take account of the equitable
considerations referred to above. Notwithstanding the provisions of this
paragraph (d), no person guilty of fraudulent misrepresentation (within the
meaning of Section 1 l(f) of the Act) shall be entitled to contribution from any
person
<PAGE>

who was not guilty of such fraudulent misrepresentation. For purposes of this
Section 5, each person who controls a Holder within the meaning of either the
Act or the Exchange Act and each director, officer, employee and agent of such
Holder shall have the same rights to contribution as such Holder, and each
person who controls the Company within the meaning of either the Act or the
Exchange Act, each officer of the Company who shall have signed the Shelf
Registration Statement and each director of the Company shall have the same
rights to contribution as the Company, and each person who controls an
Underwriter within the meaning of either the Act or the Exchange Act and each
officer and director of each Underwriter shall have the same rights to
contribution as such Underwriter, subject in each case to the applicable terms
and conditions of this paragraph (d).

(e) The provisions of this Section 5 will remain in full force and effect,
regardless of any investigation made by or on behalf of any Holder, any
Underwriter or the Company or any of the officers, directors or controlling
persons referred to in Section 5 hereof, and will survive the sale by a Holder
of Securities or shares of Common Stock covered by a Shelf Registration
Statement.

6. Miscellaneous.

(a) No Inconsistent Agreements. The Company has not, as of the date hereof,
entered into nor shall it, on or after the date hereof, enter into, any
agreement with respect to its securities that is inconsistent with the rights
granted to the Holders herein or otherwise conflicts with the provisions hereof.

(b) Amendments and Waivers. The provisions of this Agreement, including the
provisions of this sentence, may not be amended, qualified, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given, unless the Company has obtained the written consent of the
Majority Holders; provided that with respect to any matter that directly or
indirectly affects the rights of the Initial Purchasers hereunder, the Company
shall obtain the written consent of each of the Initial Purchasers against which
such amendment, qualification, supplement, waiver or consent is to be effective.
Notwithstanding the foregoing (except the foregoing proviso), a waiver or
consent to departure from the provisions hereof with respect to a matter that
relates exclusively to the rights of Holders whose Securities or Common Stock
are being sold pursuant to a Shelf Registration Statement and that does not
directly or indirectly affect the rights of other Holders may be given by the
Majority Holders, determined on the basis of Securities or Common Stock issued
upon conversion thereof being sold rather than registered under such Shelf
Registration Statement.

(c) Notices. All notices and other communications provided for or permitted
hereunder shall be made in writing by hand-delivery, first-class mail,
telecopier, or air courier guaranteeing overnight delivery:

            (1) if to you, initially at the address set forth in the Purchase
      Agreement;

            (2) if to any other Holder, at the most current address given by
      such Holder to the Company in accordance with the provisions of this
      Section 6(c), which address initially is, with respect to each Holder, the
      address of such Holder maintained by the Registrar under the Indenture or,
      in the case of Common Stock, the address maintained by the registrar of
      the Common Stock, with a copy in like manner to Salomon Smith Barney Inc.;
      and

            (3) if to the Company, initially at its address set forth in the
      Purchase Agreement.

      All such notices and communications shall be deemed to have been duly
given when received, if delivered by hand or air courier, and when sent, if sent
by first-class mail or telecopier.

      The Initial Purchasers or the Company by notice to the other may designate
additional or different addresses for subsequent notices or communications.

(d) Successors and Assigns. This Agreement shall inure
<PAGE>

to the benefit of and be binding upon the successors and assigns of each of the
parties, including, without the need for an express assignment or any consent by
the Company thereto, subsequent Holders. The Company hereby agrees to extend the
benefits of this Agreement to any Holder and Underwriter and any such Holder and
Underwriter may specifically enforce the provisions of this Agreement as if an
original party hereto. In the event that any other person shall succeed to the
Company under the Indenture as provided in Article VII thereof, then such
successor shall enter into an agreement, in form and substance reasonably
satisfactory to the Initial Purchasers, whereby such successor shall assume all
of the Company's obligations under this Agreement.

(e) Counterparts. This agreement may be executed in any number of counterparts
and by the parties hereto in separate counterparts, each of which when so
executed shall be deemed to be an original and all of which taken together shall
constitute one and the same agreement.

(f) Headings. The headings in this Agreement are for convenience of reference
only and shall not limit or otherwise affect the meaning hereof.

(g) GOVERNING LAW. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN
ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK APPLICABLE TO AGREEMENTS MADE
AND TO BE PERFORMED IN SAID STATE, WITHOUT REGARD, TO THE EXTENT PERMITTED BY
APPLICABLE LAW, TO THE CONFLICTS OF LAW RULES THEREOF.

(h) Severability. In the event that any one of more of the provisions contained
herein, or the application thereof in any circumstances, is held invalid,
illegal or unenforceable in any respect for any reason, the validity, legality
and enforceability of any such provision in every other respect and of the
remaining provisions hereof shall not be in any way impaired or affected
thereby, it being intended that all of the rights and privileges of the parties
shall be enforceable to the fullest extent permitted by law.

(i) Securities Held by the Company, etc. Whenever the consent or approval of
Holders of a specified percentage of principal amount of Securities or the
Common Stock issuable upon conversion thereof is required hereunder, Securities
or the Common Stock issued upon conversion thereof held by the Company or its
Affiliates (other than subsequent Holders of Securities or the Common Stock
issued upon conversion thereof if such subsequent Holders are deemed to be
Affiliates solely by reason of their holdings of such Securities) shall not be
counted in determining whether such consent or approval was given by the Holders
of such required percentage.

      Please confirm that the foregoing correctly sets forth the agreement
between the Company and you.

              Very truly yours,

              DOUBLECLICK INC.


      _____________________________________
      Name:
      Title:

The foregoing Agreement is hereby
confirmed and accepted as of the date
first above written.

SALOMON SMITH BARNEY INC.
BT ALEX.BROWN INCORPORATED
DONALDSON, LUFKIN & JENRETTE SECURITIES CORPORATION

For themselves and the other Initial
Purchases named in Schedule I to the
Purchase Agreement

BY: SALOMON SMITH BARNEY INC.


By:
    Name:
    Title:
<PAGE>

                                    EXHIBIT A

                                DoubleClick Inc.

                        Notice of Registration Statement

                                       and

                      Selling Securityholder Questionnaire

      Reference is hereby made to the Registration Agreement (the "Registration
Agreement") between DoubleClick Inc., a Delaware corporation (the "Company"),
and the Initial Purchasers named therein. Pursuant to the Registration
Agreement, the Company has filed or will file with the United States Securities
and Exchange Commission (the "Commission") a registration statement on Form S-3
(the "Shelf Registration Statement") for the registration and resale under Rule
415 of the Securities Act of 1933, as amended (the "Securities Act"), of the
Company's 4.75% Convertible Subordinated Notes due 2006 (the "Securities"), and
the shares of the Company's common stock, par value $.001 per share (the "Common
Stock"), issuable upon conversion thereof. A copy of the Registration Agreement
is attached hereto. All capitalized terms not otherwise defined herein shall
have the meanings ascribed thereto in the Registration Agreement.

      Each holder and beneficial owner of Transfer Restricted Securities is
entitled to have its Transfer Restricted Securities included in the Shelf
Registration Statement. In order to have Transfer Restricted Securities included
in the Shelf Registration Statement, this Notice of Registration Statement and
Selling Securityholder Questionnaire ("Notice and Questionnaire") must be
completed, executed and delivered to the Company's counsel at the following
address, for receipt ON OR BEFORE [DEADLINE FOR RESPONSE]: [NAME AND ADDRESS OF
COUNSEL]. Holders or beneficial owners of Transfer Restricted Securities who do
not complete, execute and return this Notice and Questionnaire by such date (i)
will not be named as selling securityholders in the Shelf Registration Statement
and (ii) may not use the Prospectus forming a part thereof for resales of
Transfer Restricted Securities, subject, however, to the Company's obligations
under Section 2(b)(2) of the Registration Agreement.

      Certain legal consequences arise from being named as a selling
securityholder in the Shelf Registration Statement and related Prospectus.
Accordingly, holders and beneficial owners of Transfer Restricted Securities are
advised to consult their own securities law counsel regarding the consequences
of being named or not being named as a selling securityholder in the Shelf
Registration Statement and related Prospectus.

                                    ELECTION

      The undersigned (the "Selling Securityholder") hereby elects to include in
the Shelf Registration Statement the Transfer Restricted Securities held or
beneficially owned by it and listed below in Item (3)(b). The undersigned, by
signing and returning this Notice and Questionnaire, agrees to be bound with
respect to such Transfer Restricted Securities by the terms and conditions of
this Notice and Questionnaire and the Registration Agreement, including, without
limitation, the indemnification set forth in Section 5 of the Registration
Agreement, as if the undersigned Selling Securityholder were an original party
thereto.
<PAGE>

QUESTIONNAIRE

(1) (a) Full legal name of Selling Securityholder:

      (b) Full legal name of registered holder (if not the same as in (a) above)
of Transfer Restricted Securities listed in (3) below (if the Transfer
Restricted Securities are held through a broker-dealer or other third party and,
as a result, you do not know the legal name of the registered holder, please
complete Item (l)(c) below):

      (c) Full legal name of broker-dealer or other third party through which
Transfer Restricted Securities listed in (3) below are held:

(2) Address for notices to Selling Securityholder:

Telephone:
Fax:
Contact Person:

(3) Beneficial ownership of Transfer Restricted Securities.

      Except as set forth below in this Item (3), the undersigned does not
beneficially own any Securities or shares of Common Stock which constitute
Transfer Restricted Securities.

      (a) Principal amount of Securities constituting Transfer Restricted
Securities beneficially owned:

      Number of shares of Common Stock, if any, constituting Transfer Restricted
Securities (include only shares of Common Stock which have actually been issued,
not shares issuable upon future conversion of Securities):

      The undersigned also may be deemed to beneficially own such number of
shares of Common Stock as may be issued from time to time upon conversion of the
Securities listed in Item (3)(a) above.

      (b) Principal amount of Securities and number of shares of outstanding
Common Stock constituting Transfer Restricted Securities which the undersigned
wishes to be included in the Shelf Registration Statement:

      Unless otherwise indicated in the space provided below, all Securities,
all shares of Common Stock listed in response to Item (3)(a) above, and all
shares of Common Stock issuable upon conversion of the Securities listed in
response to Item (3)(b)above, will be included in the Shelf Registration
Statement. If the undersigned does not wish all such Securities or shares of
Common Stock to be so included, please indicate below the number of such shares
to be included:

(4) Beneficial ownership of other securities of the Company:

      Except as set forth below in this item (4), the undersigned Selling
Securityholder is not the beneficial or registered owner of any shares of Common
Stock or any other securities of the Company, other than Securities and shares
of Common Stock listed above in Item (3).

      State any exceptions here:
<PAGE>

(5) Relationships with the Company:

      Except as set forth below, neither the Selling Securityholder nor any of
its officers, directors or 5% or greater stockholders has held any position or
office or has had any other material relationship with the Company (or its
predecessors or affiliates)during the past three years.

      State any exceptions here:

(6) Plan of Distribution:

      Except as set forth below, the undersigned Selling Securityholder intends
to distribute the Transfer Restricted Securities listed above in Item (3) only
as follows (if at all): Such Transfer Restricted Securities may be sold from
time to time by the undersigned Selling Securityholder (i) to or through
underwriters, brokers or dealers; (ii) directly to one or more other purchasers;
(iii) through agents on a best-efforts basis or otherwise; or (iv) through a
combination of any such methods of sale. Such Transfer Restricted Securities may
be sold from time to time in one or more transactions at a fixed price or
prices, which may be changed, at market prices prevailing at the time of sale,
at prices related to such prevailing market prices, at varying prices determined
at the time of sale, or at negotiated prices. Such sales may be effected in
transactions (which may involve crosses or block transactions) (i) on any
national securities exchange or quotation service on which the Transfer
Restricted Securities may be listed or quoted at the time of sale, (ii) in the
over-the-counter market, (iii) in transactions otherwise than on such exchanges
or services or in the over-the-counter market, or (iv) through the writing of
options. In connection with sales of the Transfer Restricted Securities or
otherwise, the Selling Securityholder may enter into hedging transactions with
brokers-dealers or others, which may in turn engage in short sales of the
Transfer Restricted Securities in the course of hedging the positions they
assume. The Selling Securityholder may also sell Transfer Restricted Securities
short and deliver Transfer Restricted Securities to close out such short
positions, or loan or pledge Transfer Restricted Securities to brokers-dealers
or others that in turn may sell such securities. The Selling Securityholder may
pledge or grant a security interest in some or all of the Transfer Restricted
Securities owned by it and, if it defaults in the performance of its secured
obligations, the pledgees or secured parties may offer and sell the Transfer
Restricted Securities from time to time pursuant to the Prospectus. The Selling
Securityholder also may transfer and donate shares in other circumstances in
which case the transferees, donees, pledgees or other successors in interest
will be the selling stockholders for purposes of the Prospectus. The Selling
Securityholder may sell short the Common Stock and may deliver the Prospectus in
connection with such short sales and use the shares covered by the Prospectus to
cover such short sales.

      State any exceptions here:

      By signing below, the Selling Securityholder acknowledges that it
understands its obligation to comply, and agrees that it will comply, with the
provisions of the Securities Exchange Act of 1934, as amended, and the rules and
regulations thereunder, particularly Regulation M and the prospectus delivery
requirements under the Securities Act.

      In the event that the Selling Securityholder transfers all or any portion
of the Transfer Restricted Securities listed in Item (3) above after the date on
which such information is provided to the Company (other than a transaction as a
result of which such securities shall no longer be Transfer Restricted
Securities), the Selling Securityholder agrees to notify the transferees at the
time of the transfer of its rights and obligations under this Notice and
Questionnaire and the Registration Agreement.

      By signing below, the Selling Securityholder consents to the disclosure of
the information contained herein in its answers to Items (1) through (6) above
and the inclusion of such information in the Shelf Registration Statement and
related Prospectus. The Selling Securityholder understands that such information
will be relied upon by the Company in connection with the preparation of the
Shelf Registration Statement and related Prospectus.
<PAGE>

      The Selling Securityholder agrees to promptly notify the Company of any
inaccuracies or changes in the information provided herein which may occur
subsequent to the date hereof at any time while the Shelf Registration Statement
remains in effect. All notices hereunder and pursuant to the Registration
Agreement shall be made in writing, by hand-delivery, first class mail, or air
courier guaranteeing overnight delivery as follows:

            DoubleClick Inc.
            41 Madison Avenue, 32nd Floor
            New York, New York 10010
            Attention: Chief Financial Officer

      Once this Notice and Questionnaire is executed by the Selling
Securityholder and received by the Company, the terms of this Notice and
Questionnaire, and the representations and warranties contained herein, shall be
binding on, shall inure to the benefit of and shall be enforceable by the
respective successors, heirs, personal representatives, and assigns of the
Company and the Selling Securityholder (with respect to the Transfer Restricted
Securities beneficially owned by such Selling Securityholder and listed in Item
(3)(b) above). This Agreement shall be governed by and construed in accordance
with the internal laws of the State of New York.

      IN WITNESS WHEREOF, the undersigned, by authority duly given, has caused
this Notice and Questionnaire to be executed and delivered either in person or
by its duly authorized agent.

Dated:

                              Selling Securityholder
                    (Print/type full legal name of beneficial
                    owner of Transfer Restricted Securities).


                    By:
                    Name:
                    Title:
<PAGE>

                                    EXHIBIT B

                   FORM OF LETTER TO BE PROVIDED BY ISSUER TO

                          THE DEPOSITORY TRUST COMPANY

The Depository Trust Company
7 Hanover Square, 23rd Floor
New York, NY 10004

      Re.   4.75% Convertible Subordinated Notes due 2006 (the "Securities") of
            DoubleClick Inc.

Ladies and Gentlemen:

      Please be advised that the Securities and Exchange Commission has declared
effective a Registration Statement on Form S-3 under the Securities Act of 1933,
as amended, with regard to all of the Securities referenced above. Accordingly,
there is no longer any restriction as to whom such Securities may be sold and
any restrictions on the CUSIP designation are no longer appropriate and may be
removed. I understand that upon receipt of this letter, DTC will remove any stop
or restriction on its system with respect to this issue.

      As always, please do not hesitate to call if we can of further assistance.

                                  Very truly yours,


                                  By:
                                  Authorized Officer



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