Document:

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                                                                   EXHIBIT 10.28

March 15, 2004

Mr. Michael Ruffolo

[address]

Dear Mike:

      As we have discussed, I have determined that it is best for us to separate
at this time. I want to thank you for your efforts since 2001 to help me to
restructure Akamai and to help put the company on its path toward profitability
and continuing success. Despite the current differences between us, I want to
wish you personal success wherever your endeavors may lead.

      In connection with your separation from employment with Akamai
Technologies, Inc. ("Akamai" or the "Company") on April 9, 2004, you are
eligible to receive the benefits described in this Agreement (the "Agreement")
if you sign and return this Agreement to Tiffany Mosher-Taylor, Vice President
of Human Resources, by April 6, 2004 and do not rescind it within the seven-day
rescission period described below.

      1. SEPARATION OF EMPLOYMENT. You acknowledge that your employment with
Akamai will terminate effective April 9, 2004 (the "Separation Date"). From and
after the Separation Date, you shall have no authority, and shall not represent
yourself, as an employee or agent of Akamai.

      2. DESCRIPTION OF ADDITIONAL BENEFITS. In consideration for the
undertakings, transactions, and considerations recited in this Agreement, within
10 days after this Agreement becomes binding upon you ("Payment Date"), Akamai
agrees to provide you with the following:

      (i) A lump sum payment of Four Hundred Thousand Dollars and Zero Cents
      ($400,000.00) less all applicable federal, state, local and other
      employment-related taxes, deductions, and withholdings, in accordance with
      the Company's normal payroll practices, which sum represents one year of
      base pay (the "Severance Pay").

      (ii) Pursuant to the Restricted Stock Agreement Under Second Amended and
      Restated 1998 Stock Incentive Plan entered into on November 14, 2002, the
      Company agrees to authorize the accelerated vesting of your 175,000 shares
      of restricted stock as of April 9, 2004; and

      (iii) A lump sum cash payment of Seven Thousand Seventy-Seven Dollars and
      Zero Cents ($7,077.00), less all applicable federal, state, local and
      other employment-related taxes, deductions, and withholdings, in
      accordance with the Company's normal payroll practices, which sum
      represents an amount equal to one year's worth of the Company's current
      contribution to your medical and dental plan. You may use this money to
      cover the costs of medical and dental coverage under Consolidated Omnibus
      Budget Reconciliation Act of 1985 ("COBRA"). This payment shall be in lieu
      of reimbursement by the Company of part or all of the costs to continue
      your medical and dental coverage pursuant to COBRA. Upon timely completion
      of the forms required by COBRA, you may continue, at your sole expense,
      your medical and dental insurance coverage after the Separation Date to
      the extent permitted by COBRA. The COBRA "qualifying event" shall be
      deemed to be the Separation Date.
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Separation Letter for Mike Ruffolo
March 15, 2004
Page 2

      (iv) The Company agrees that it will instruct the Chairman and CEO,
      Members of the Office of the CEO, the Board of Directors, and the Vice
      President of Human Resources to describe your separation in accordance
      with a mutually agreed statement.

      You acknowledge and agree that the benefits described in this Section 2
are not intended to, and shall not constitute, a severance plan, and shall
confer no benefit on anyone other than the parties hereto. You further
acknowledge that except for (i) the specific financial consideration set forth
in this Agreement, (ii) wages owed for work performed up to the Separation Date,
(iii) payment of accrued and unused vacation time, (iv) expense reimbursement
for previously submitted expenses in accordance with Akamai's expense
reimbursement policies, and (v) a refund, if one is due, of your current
participation in the Employee Stock Purchase Plan ("ESPP") (if you are currently
enrolled in the ESPP, your participation in the plan will end on your
termination date) you are not, and shall not in the future be, entitled to any
other compensation including, without limitation, other wages, commissions,
bonuses, vacation pay, holiday pay, or any other form of compensation or
benefit.

      3. STOCK OPTIONS. You agree that, effective as of the close of business on
April 9, 2004, you will forfeit, and the Company will cancel, the incentive
stock option to purchase 323,438 shares of the Company's Common Stock, with a
strike price of $3.71 per share, that you were granted on May 15, 2001 and as
evidenced by an Incentive Stock Option Agreement Granted Under 1998 Stock
Incentive Plan. The Company and you agree that this paragraph shall have no
affect on your remaining option to purchase 251,562 shares of Common Stock of
the Company in which you have vested. Pursuant to the Company's 1998 Stock
Incentive Plan, you will have up to three months after the Separation Date to
exercise your stock rights. Except as described in Section 2(ii) above, all
unvested stock rights will be cancelled on the Separation Date.

      4. RETURN OF COMPANY PROPERTY. You confirm that, as of the Separation
Date, you will have returned to Akamai all Akamai records and documents (and any
copies thereof), all keys, files, equipment belonging to the Company (including,
but not limited to, computer hardware, software and printers, wireless handheld
devices, pagers, etc.), Company identification, and any other Company-owned
property in your possession or control and have left intact all electronic
Company documents, including but not limited to those which you developed or
helped to develop during your employment. You further confirm that you will have
cancelled all accounts for your benefit, if any, in the Company's name,
including but not limited to, credit cards, telephone charge cards, cellular
phone and/or pager accounts and computer accounts. Moreover, you agree that you
will not, without Akamai's express authorization, access, attempt to access or
otherwise interfere with Akamai's electronic information systems, including but
not limited to Akamai's computer, voice mail, or e-mail systems.

      5. BUSINESS EXPENSES AND COMPENSATION. You acknowledge that the Company
has reimbursed you for all costs and business expenses incurred in conjunction
with the performance of your employment and that no other reimbursements are
owed to you. You further acknowledge that you have received payment in full for
all services rendered in conjunction with your employment by the Company and
that no other compensation is owed to you.

      6. MUTUAL NON-DISPARAGEMENT. To the extent permitted by law, you
understand and agree that, as a condition for payment to you of the
consideration herein described, you shall not make any false, disparaging or
derogatory statements to anyone, including but not limited to any media outlet,
industry group, financial institution, current or former employee, consultant,
client or customer of the Company, regarding the Company or any of its
directors, officers, employees, agents or representatives or about the Company's
business affairs and financial condition, any statements that disparage any
person, product, service, finances, financial condition, capability or any other
aspect of the business of Akamai, and you will not engage in any conduct which
is intended to harm professionally or personally the
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Separation Letter for Mike Ruffolo
March 15, 2004
Page 3

reputation of Akamai (including its officers, directors, and employees). The
Company agrees to instruct its the Chairman and CEO, Members of the Office of
the CEO, the Board of Directors, and the Vice President of Human Resources with
knowledge of this Agreement not to make any false, disparaging or derogatory
statements to anyone, including but not limited to any media outlet, industry
group, or current or future employee about you or your employment with, and
separation from, the Company.

      7. MUTUAL RELEASE OF CLAIMS. In consideration of the benefits set forth in
Section 2 above and the Company's release below, which you acknowledge you would
not otherwise be entitled to receive, you hereby fully, forever, irrevocably and
unconditionally release, remise and discharge the Company, its officers,
directors, stockholders, corporate affiliates, subsidiaries, parent companies,
agents and employees (each in their individual and corporate capacities)
(hereinafter, the "Released Parties") from any and all claims, charges,
complaints, demands, actions, causes of action, suits, rights, debts, sums of
money, costs, accounts, reckonings, covenants, contracts, agreements, promises,
doings, omissions, damages, executions, obligations, liabilities, and expenses
(including attorneys' fees and costs), of every kind and nature which you ever
had or now have against the Released Parties arising out of your employment with
and/or separation from the Company, including, but not limited to, all
employment discrimination claims or employment law claims under Civil Rights
Acts of 1866 and 1871, Civil Rights Act of 1991, the Equal Pay Act, Older
Workers Benefits Protection Act, Fair Labor Standards Act, National Labor
Relations Act, Consolidated Omnibus Reconciliation Act of 1985 ("COBRA"), Title
VII of the Civil Rights Act of 1964, 42 U.S.C. Section 2000e et seq., the Age
Discrimination in Employment Act, 29 U.S.C. Section 621 et seq., --- the
Americans With Disabilities Act of 1990, 42 U.S.C., Section 12101 et seq., the
Family and Medical Leave Act, 29 U.S.C. Section 2601 et seq., and the Worker
Adjustment and Retraining Notification Act ("WARN"), 29 U.S.C. Section 2101 et
seq. all as amended; all claims arising out of the Fair Credit Reporting ---
Act, 15 U.S.C. Section 1681 et seq., the Employee Retirement Income Security Act
of 1974 ("ERISA"), 29 U.S.C. Section 1001 et seq., the Massachusetts Fair
Employment Practices Act., M.G.L. c.151B, Section 1 et seq., the Massachusetts
Civil Rights Act, M.G.L. c.12 Sections 11H and 11I, the Massachusetts Equal
Rights Act, M.G.L. c.93, Section 102 and M.G.L. c.214, Section 1C, the
Massachusetts Labor and Industries Act, M.G.L. c.149, Section 1 et seq., the
Massachusetts Privacy Act, M.G.L. c. 214, Section 1B, and the Massachusetts
Maternity Leave Act , M.G.L. c. 149, Section 105(d), all as amended; all common
law claims including, but not limited to, actions in tort, defamation and breach
of contract; all claims to any non-vested ownership interest in the Company,
contractual or otherwise, including but not limited to claims to stock or stock
options; and any claim or damage arising out of your employment with or
separation from the Company (including a claim for retaliation) under any common
law theory or any federal, state or local statute or ordinance not expressly
referenced above; provided, however, that nothing in this Agreement prevents you
from filing, cooperating with, or participating in any proceeding before the
EEOC or a state Fair Employment Practices Agency (except that you acknowledge
that you may not be able to recover any monetary benefits in connection with any
such claim, charge or proceeding).

      In consideration of the undertakings, transactions and consideration
recited in this Agreement, the Company hereby unconditionally and irrevocably
remises, releases and forever discharges you, your heirs and administrators, or
any of them, of and from any and all suits, claims, demands, interest, costs
(including attorney fees and costs actually incurred), expenses, actions and
causes of action, rights, liabilities, obligations, promises, agreements,
controversies, losses and debts, of any nature whatsoever, which the Company now
has, or at any time heretofore ever had, or could have had, whether known or
unknown, suspected or unsuspected, arising out of your employment with the
Company.

      8. FUTURE COOPERATION/INDEMNIFICATION. You agree that you shall cooperate
fully with Akamai in connection with any matter or event relating to your
employment or events that occurred during your employment, including, without
limitation, in the defense or prosecution of any claims or actions not in
existence or which may be brought or threatened in the future against or on
behalf of Akamai, including any claims or actions against its officers,
directors and employees. Your cooperation
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Separation Letter for Mike Ruffolo
March 15, 2004
Page 4

in connection with such matters, actions and claims shall include, without
limitation, being available, upon reasonable notice, to meet with Akamai
regarding matters in which you have been involved, and any contract matters or
audits; to prepare for any proceeding (including, without limitation,
depositions, consultation, discovery or trial); to provide affidavits; to assist
with any audit, inspection, proceeding or other inquiry; and to act as a witness
in connection with any litigation or other legal proceeding affecting Akamai.
You shall be reimbursed for actual and reasonable out-of-pocket expenses
incurred in providing such cooperation under this Section. To the extent
permitted by law, you further agree that should you be contacted (directly or
indirectly) by any person or entity (for example, by any party representing an
individual or entity) adverse to Akamai, you shall promptly notify Akamai's
General Counsel.

      9. NON-DISCLOSURE AND NON-COMPETITION AND NON-SOLICITATION. You
acknowledge and reaffirm your obligation to keep confidential all non-public
information concerning the Company which you acquired during the course of your
employment with the Company which remains in full force and effect, as stated
more fully in the Non-Competition and Non-Solicitation Agreement and the
Invention and Non-Disclosure Agreement ("NDAs") you signed when you began your
employment at Akamai. You further acknowledge and reaffirm that those
agreements, and your obligations there under, also remain in full force and
effect.

      10. BREACH. A breach of any provision of Section 3-9 shall constitute a
material breach of this Agreement and, in addition to any other legal or
equitable remedy available to Akamai, shall entitle Akamai to recover any monies
paid to you under Section 2, as well as to cease complying with Sections 2 (iv)
and 6, of this Agreement. You also acknowledge that the provisions of this
Section 10 are reasonable and necessary to protect Akamai's business interests,
and further that your breach of any of the covenants set forth in Sections 3-9
would constitute a material breach of the Agreement, that Akamai would suffer
substantial irreparable harm and that Akamai would not have an adequate remedy
at law for such breach. Therefore, in recognition of these acknowledgements, you
agree that in the event of a breach of any of these covenants, in addition to
such other remedies as Akamai may have at law, Akamai, without posting any bond,
shall be entitled to obtain, and you agree not to oppose, a request for
equitable relief in the form of specific performance or temporary, preliminary
or permanent injunctive relief, or any other equitable remedy which then may be
available. The seeking of such injunction or order shall not affect Akamai's
right to seek and obtain damages or other equitable relief on account of any
such actual. You further acknowledge and agree to enforcement of these covenants
under the laws of and in the Commonwealth of Massachusetts, where Akamai
maintains its worldwide headquarters, where all personnel and benefit plans are
administered, documents maintained, where this Agreement has been executed by
Akamai, and where witnesses and documents relating to any dispute would be
primarily located.

      11. AMENDMENT. This Agreement shall be binding upon the parties and may
not be modified in any manner, except by an instrument in writing of concurrent
or subsequent date signed by duly authorized representatives of the parties
hereto. This Agreement is binding upon and shall inure to the benefit of the
parties and their respective agents, assigns, heirs, executors, successors and
administrators.

      12. WAIVER OF RIGHTS. No delay or omission by the Company in exercising
any right under this Agreement shall operate as a waiver of that or any other
right. A waiver or consent given by the Company on any one occasion shall be
effective only in that instance and shall not be construed as a bar or waiver of
any right on any other occasion.

      13. VALIDITY. Should any provision of this Agreement be declared or be
determined by any court of competent jurisdiction to be illegal or invalid, the
validity of the remaining parts, terms or provisions shall not be affected
thereby and said illegal or invalid part, term or provision shall be deemed not
to be a part of this Agreement.
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Separation Letter for Mike Ruffolo
March 15, 2004
Page 5

      14. CONFIDENTIALITY. You understand and agree that as a condition for
payment to you and of the Company's description of your separation and
non-disparagement obligations, herein described, the terms and contents of this
Agreement, and the contents of the negotiations and discussions resulting in
this Agreement, shall be maintained as confidential by you and your agents and
representatives and shall not be disclosed except to the extent required by
federal or state law or as otherwise agreed to in writing by the Company.

      15. ACKNOWLEDGMENTS. It is Akamai's desire and intent to make certain that
you fully understand the provisions and effects of this Agreement. To that end,
you have been encouraged and given the opportunity to consult with legal counsel
before signing below and returning this Agreement to Tiffany Mosher-Taylor, Vice
President of Human Resources, Akamai Technologies, Inc., 8 Cambridge Center,
Cambridge, MA 02142. You may take up to twenty-one (21) days (until close of
business on April 6, 2004) to sign this Agreement. In addition, if you sign this
Agreement within that time period, you may change your mind and rescind your
assent to this Agreement if, within seven (7) days after you sign this
Agreement, you deliver a notice of rescission to Tiffany Mosher-Taylor, Vice
President of Human Resources, at Akamai. To be effective, such rescission must
be hand delivered or postmarked within the seven (7) day period and sent by
certified mail, return receipt requested, to Tiffany Mosher-Taylor, Vice
President of Human Resources, Akamai Technologies, Inc., 8 Cambridge Center,
Cambridge, MA 02142. If you do not so rescind, this Agreement will become a
binding agreement between you and the Company upon the expiration of the seven
(7) day rescission period

      If you choose not to sign and return this Agreement by April 6, 2004, for
the reasons previously discussed, you shall not receive any benefits from the
Company. You will, however, receive payment on your separation from employment
for any unused vacation time accrued through the separation date. Also,
regardless of signing this Agreement, you may elect to continue receiving group
medical insurance pursuant to COBRA. You shall pay all premium costs on a
monthly basis for as long as, and to the extent that, you remain eligible for
COBRA continuation. You should consult the COBRA materials to be provided by the
Company for details regarding these benefits. All other benefits, including life
insurance and long-term disability, will cease upon your Separation Date.

      You acknowledge that you have been given at least twenty-one (21) days to
consider this Agreement and that the Company advised you to consult with an
attorney of your own choosing prior to signing this Agreement. You understand
that you may revoke this Agreement for a period of seven (7) days after you sign
this Agreement, and this Agreement shall not be effective or enforceable until
the expiration of this seven (7) day revocation period. YOU UNDERSTAND AND AGREE
THAT BY ENTERING INTO THIS AGREEMENT YOU ARE WAIVING ANY AND ALL RIGHTS OR
CLAIMS YOU MIGHT HAVE UNDER THE AGE DISCRIMINATION IN EMPLOYMENT ACT, AS AMENDED
BY THE OLDER WORKERS BENEFIT PROTECTION ACT, AND THAT YOU HAVE RECEIVED
CONSIDERATION BEYOND THAT TO WHICH YOU WERE PREVIOUSLY ENTITLED.

      16. VOLUNTARY ASSENT. You affirm that no other promises or agreements of
any kind have been made to or with you by any person or entity whatsoever to
cause you to sign this Agreement, and that you fully understand the meaning and
intent of this Agreement. You state and represent that you have had an
opportunity to fully discuss and review the terms of this Agreement with an
attorney. You further state and represent that you have carefully read this
Agreement, understand the contents herein, freely and voluntarily assent to all
of the terms and conditions hereof, and sign your name of your own free act.

      17. APPLICABLE LAW. This Agreement shall be interpreted and construed by
the laws of the Commonwealth of Massachusetts, without regard to conflict of
laws provisions. You hereby irrevocably submit to and acknowledge and recognize
the jurisdiction of the courts of the Commonwealth of
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Separation Letter for Mike Ruffolo
March 15, 2004
Page 6

Massachusetts, or if appropriate, a federal court located in Massachusetts
(which courts, for purposes of this Agreement, are the only courts of competent
jurisdiction), over any suit, action or other proceeding arising out of, under
or in connection with this Agreement or the subject matter hereof. You also
acknowledge that venue for such actions shall lie exclusively in Massachusetts
and that material witnesses and documents are located in Massachusetts.

      18. ENTIRE AGREEMENT. Except for the NDAs, this Agreement contains and
constitutes the entire understanding and agreement between the parties hereto
with respect to your additional benefits and the settlement of claims against
the Company and cancels all previous oral and written negotiations, agreements,
commitments, writings in connection therewith. Nothing in this paragraph,
however, shall modify, cancel or supersede your obligations set forth in this
Agreement. The provisions of this Agreement are severable and if, for any
reason, any part hereof shall be found to be unenforceable, the remaining
provisions shall be enforced in full.

            If you have any questions about the matters covered in this
Agreement, please call Tiffany Mosher-Taylor.

                                    Very truly yours,

                                    AKAMAI TECHNOLOGIES, INC.

                                    By:   /s/ George H. Conrades
                                          -----------------------
                                          George H. Conrades
                                          Chairman and CEO

            I hereby agree to the terms and conditions set forth above. I have
been given at least twenty-one (21) days to consider this Agreement and I have
chosen to execute this on the date below. I intend that this Agreement become a
binding agreement between the Company and me if I do not revoke my acceptance in
seven (7) days.

/s/ Michael Ruffolo                             Date March 22, 2004
------------------------------                       --------------
MICHAEL RUFFOLO

To be returned by April 6, 2004<PAGE>

                                                                     EXHIBIT 4.1

                                                               EXECUTION VERSION

                          SECURITIES PURCHASE AGREEMENT

      SECURITIES PURCHASE AGREEMENT, dated March 19, 2004 (this "Agreement"), by
and among Xerox Imaging Systems, Inc., a Delaware corporation (the "Seller"),
and Warburg Pincus Private Equity VIII, L.P., Warburg Pincus Netherlands Private
Equity VIII I C.V., Warburg Pincus Netherlands Private Equity VIII II C.V., and
Warburg Pincus Germany Private Equity VIII K.G. (collectively, the
"Purchasers"), and, solely for purposes of Sections 5 and 6 of this Agreement,
ScanSoft, Inc., a Delaware corporation (the "Company").

      WHEREAS, the Seller owns of record and beneficially 11,853,602 shares (the
"Common Shares") of the common stock, par value $.001 per share (the "Common
Stock"), of the Company; 3,562,238 shares (the "Preferred Shares") of the Series
B Preferred Stock, par value $.001 per share (the "Preferred Stock"), of the
Company; and a Common Stock Purchase Warrant (the "Warrant") issued by the
Company under its former name, Visioneer, Inc., on March 2, 1999; and

      WHEREAS, the Seller desires to sell, transfer, assign and convey to the
Purchasers, and the Purchasers desire to purchase from the Seller, upon the
terms and subject to the conditions set forth herein, the Common Shares, the
Preferred Shares and the Warrant, together with such additional securities,
property or payments which accrue, are paid or payable on, or received or
receivable with respect to the Common Shares, the Preferred Shares and the
Warrant from and including the date hereof until the Closing Date (collectively,
the "Securities");

      NOW, THEREFORE, in consideration of the mutual covenants and agreements
set forth herein, the parties hereto hereby agree as follows:

1.    PURCHASE AND SALE OF SECURITIES

      Upon the terms and subject to the conditions set forth herein, on the
Closing Date (as defined in Section 2(a) below), the Seller shall sell,
transfer, assign and convey the Securities to the Purchasers, and the Purchasers
shall purchase the Securities from the Seller, in the amounts set forth on
Schedule I hereto, for an aggregate cash purchase price of $79,387,163.48 (the
"Purchase Price"). The obligations of the Purchasers hereunder shall be joint
and several.

2.    CLOSING; CONDITIONS

      (a)   Closing. Subject to Section 8(a), the closing of the purchase and
sale of the Securities (the "Closing") shall take place at the offices of
Willkie Farr & Gallagher LLP, 787 Seventh Avenue, New York, New York 10019, as
soon as practicable after the conditions described in Section 2(c) and (d) are
satisfied (or waived by the parties entitled to waive them), or at such other
time or place as may be mutually agreed to by the parties hereto. The actual
date on which the Closing shall occur is herein referred to as the "Closing
Date."

      (b)   At the Closing, such sale and purchase shall be effected by the
Seller's delivering to the Purchasers the original Warrant and duly executed
certificates or other instruments evidencing the other Securities to be
purchased, in each case with appropriate instruments of transfer attached (duly
endorsed or otherwise in form sufficient for transfer), against delivery by the
Purchasers to the Seller of the Purchase Price. All such certificates and other
instruments

<PAGE>

shall be satisfactory to counsel to the Purchaser. Subject to Section 9(e), the
Purchase Price shall be paid by wire transfer of immediately available funds to
such account or accounts as the Seller shall designate in writing no later than
the close of business on the second business day immediately preceding the
Closing Date.

      (c)   Conditions to the Purchasers' Obligations. The obligations of the
Purchasers to purchase the Securities and to pay the Purchase Price are subject
to the satisfaction prior to or at the Closing (or the waiver of same by the
Purchasers) of each of the following conditions precedent:

            (i)   Each of the representations and warranties made by the Seller
      in Section 3 shall have been true and correct in all material respects
      when made and at the Closing Date as though each such representation and
      warranty were made on and as of the Closing Date immediately prior to the
      Closing.

            (ii)  The Seller shall have performed and complied in all material
      respects with all agreements, obligations and conditions required by this
      Agreement to be performed or complied with by it at or prior to the
      Closing.

            (iii) The Seller shall have delivered to the Purchasers a
      certificate dated the Closing Date and signed by one of its duly
      authorized officers confirming the matters referred to in subsections (i)
      and (ii) of this Section 2(c).

            (iv)  In addition to the deliveries required by Section 2(b) above,
      the Seller shall have delivered to the Purchasers an instrument of
      assignment of the Warrant, which instrument shall be reasonably
      satisfactory to counsel to the Purchasers and which shall contain the
      Company's affirmation of its acknowledgment and agreement (as set forth in
      Section 6(a)(ix)) to (A) the assignment of the Warrant and (B) treat the
      Purchasers as the holders of the Warrant so as to purchase such number of
      shares of Common Stock underlying the Warrant (as equitably adjusted from
      time to time in the event of any stock dividend, stock split,
      recapitalization, reclassification, recombination or the like) set forth
      opposite their respective names on Schedule I hereto for all purposes
      thereunder (notwithstanding any provision in the Warrant, including but
      not limited to Sections 5 and 9.2 thereof, to the contrary).

            (v)   No temporary restraining order, preliminary or permanent
      injunction or other order issued by a court of competent jurisdiction or
      other legal restraint or legal prohibition preventing the consummation of
      the Closing shall be in effect.

            (vi)  The waiting period under the Hart-Scott-Rodino Antitrust
      Improvements Act of 1976 (the "HSR Act") applicable to the transactions
      contemplated hereby shall have expired or been terminated.

      (d)   Conditions to the Seller's Obligations. The obligations of the
Seller to sell, transfer, assign and convey the Securities to the Purchasers are
subject to the satisfaction prior to or at the Closing (or the waiver of same by
the Seller) of each of the following conditions precedent:

                                     - 2 -
<PAGE>

            (i)   Each of the representations and warranties made by the
      Purchasers in Section 4 shall have been true and correct in all material
      respects when made and at the Closing Date as though each such
      representation and warranty were made on and as of the Closing Date
      immediately prior to the Closing.

            (ii)  The Purchasers shall have performed and complied in all
      material respects with all agreements, obligations and conditions required
      by this Agreement to be performed or complied with by them at or prior to
      the Closing.

            (iii) The Purchasers shall have delivered to the Seller a
      certificate dated the Closing Date and signed by their duly authorized
      officers confirming the matters referred to in subsections (i) and (ii) of
      this Section 2(d).

            (iv)  No temporary restraining order, preliminary or permanent
      injunction or other order issued by a court of competent jurisdiction or
      other legal restraint or legal prohibition preventing the consummation of
      the Closing shall be in effect.

            (v)   The waiting period under the HSR Act applicable to the
      transactions contemplated hereby shall have expired or been terminated.

3.    REPRESENTATIONS AND WARRANTIES AND COVENANTS OF THE SELLER

      The Seller represents and warrants to, and covenants with, the Purchasers
and, with respect to Section 3(f), the Company that:

      (a)   The Seller is a corporation duly organized, validly existing and in
good standing under the laws of the State of Delaware.

      (b)   The Seller has full legal right, power and authority to execute,
deliver, and perform its obligations under this Agreement in accordance with
their terms, and the execution, delivery and performance of this Agreement by
the Seller and the consummation by the Seller of the transactions contemplated
hereby have been duly authorized by all necessary action on behalf of the
Seller. This Agreement has been duly executed and delivered by the Seller and
constitutes a legally valid and binding agreement of the Seller, enforceable
against the Seller in accordance with its terms.

      (c)   The Seller has good and marketable title to the Securities, and the
Securities are owned by the Seller free and clear of any security interest,
lien, claim or other encumbrance or any restriction on transfer or voting
(collectively, "Encumbrances"). Upon delivery of the Securities to the
Purchasers at the Closing, against payment therefor as contemplated hereby, the
Seller will deliver the Securities to the Purchasers free and clear of any
Encumbrance.

      (d)   No consent, approval, authorization or order or permit of any court,
governmental agency or body or arbitrator having jurisdiction over the Seller is
required for the execution, delivery or performance by the Seller of its
obligations hereunder including, without limitation, the sale, transfer,
assignment and conveyance of the Securities.

                                     - 3 -
<PAGE>

      (e)   Neither execution and delivery of this Agreement nor the sale of the
Securities nor the performance of the Seller's other obligations hereunder will
violate, conflict with, result in a breach of, or constitute a default (or an
event that, with the giving of notice or the lapse of time, or both, would
constitute a default) under (i) the certificate of incorporation, bylaws or
other organizational documents of the Seller, or (ii) any decree, judgment,
order, law, rule, regulation or determination of any court, governmental agency
or body or arbitrator having jurisdiction over the Seller or any of its assets
or properties.

      (f)   The Seller acknowledges that the Purchasers may be in possession of
material non-public information not known to it (the "Excluded Information") and
further acknowledges that the Purchasers and the Company (under appropriate
nondisclosure agreement) have offered to share with the Seller any Excluded
Information that may exist. The Seller agrees that neither the Purchasers nor
the Company shall have any liability with respect to any such non-disclosure.
The Seller hereby waives any and all claims and causes of action now or
hereafter arising against the Purchasers and/or the Company based upon or
relating to such non-disclosure and further covenants not to sue either the
Purchasers or the Company or any of their respective partners, directors,
officers, employees, agents or affiliates for any loss, damage or liability
arising from or relating to such non-disclosure. It is understood and agreed
that the Purchasers make no representation or warranty whatsoever with respect
to the business, condition (financial or otherwise), properties, prospects,
creditworthiness, status or affairs of the Company, or with respect to the value
of the Securities.

      (g)   There is no investment banker, broker, finder or other intermediary
who might be entitled to any fee or commission upon consummation of the
transactions contemplated by this Agreement based upon arrangements made by or
on behalf of the Seller.

4.    REPRESENTATIONS AND WARRANTIES AND COVENANTS OF THE PURCHASERS

      The Purchasers represent and warrant to, and covenant with, the Seller
and, with respect to Section 4(e), the Company that:

      (a)   Each of the Purchasers is duly formed, validly existing and in good
standing under the laws of its jurisdiction of organization.

      (b)   Each of the Purchasers has full legal right, power and authority to
execute, deliver, and perform its obligations under this Agreement in accordance
with their terms, and the execution, delivery and performance of this Agreement
by the Purchasers and the consummation by the Purchasers of the transactions
contemplated hereby have been duly authorized by all necessary action on behalf
of the Purchasers. This Agreement has been duly executed and delivered by the
Purchasers and constitutes a legally valid and binding agreement of the
Purchasers, enforceable against the Purchasers in accordance with its terms.

      (c)   No consent, approval, authorization or order or permit of any court,
governmental agency or body or arbitrator having jurisdiction over the
Purchasers is required for the execution, delivery or performance by the
Purchasers of their obligations hereunder, including without limitation the
purchase of the Securities.

                                     - 4 -
<PAGE>

      (d)   Neither execution and delivery of this Agreement nor the acquisition
of the Securities or the performance of the Purchasers' other obligations
hereunder will violate, conflict with, result in a breach of, or constitute a
default (or an event that, with the giving of notice or the lapse of time, or
both, would constitute a default) under (i) the organizational documents of the
Purchasers, or (ii) any decree, judgment, order, law, rule, regulation or
determination of any court, governmental agency or body or arbitrator having
jurisdiction over the Purchasers or any of their assets or properties.

      (e)   The Purchasers acknowledge that the Seller has not provided
Purchasers with any information regarding the Company. The Purchasers agree that
neither the Seller nor the Company shall have any liability with respect to any
such non-disclosure. The Purchasers hereby waive any and all claims and causes
of action now or hereafter arising against the Seller and/or the Company based
upon or relating to such non-disclosure and further covenants not to sue either
the Company or the Seller or any of their respective partners, directors,
officers, employees, agents or affiliates for any loss, damage or liability
arising from or relating to such non-disclosure. It is understood and agreed
that the Seller makes no representation or warranty whatsoever with respect to
the business, condition (financial or otherwise), properties, prospects,
creditworthiness, status or affairs of the Company, or with respect to the value
of the Securities.

      (f)   To the best of the Purchasers' knowledge, none of the Purchasers or
any of their affiliates owns a material amount of the voting securities of any
business entity that sells products that compete with the Company's products.

      (g)   There is no investment banker, broker, finder or other intermediary
who might be entitled to any fee or commission upon consummation of the
transactions contemplated by this Agreement based upon arrangements made by or
on behalf of the Purchasers.

5.    ADDITIONAL COVENANTS OF THE PARTIES

      (a)   Further Assurances. From and after the date hereof, the each party
hereto (including the Company) shall execute all certificates, instruments,
documents or agreements and shall take any other action which it is reasonably
requested to execute or take by any other party hereto to further effectuate the
respective rights and obligations of the parties hereto under, and as
contemplated by, this Agreement.

      (b)   Commercially Reasonable Efforts. Each of the parties hereto
(including the Company) will use commercially reasonable efforts to take, or
cause to be taken, all action, and to do, or cause to be done, all things
necessary, proper or advisable consistent with applicable law to consummate and
make effective in the most expeditious manner practicable the transactions
contemplated hereby, including without limitation, making all required
regulatory filings as promptly as practicable after the date hereof. Without
limiting the generality of the foregoing, Purchasers and the Company will each,
as promptly as practicable following the execution and delivery of this
Agreement, file with the United States Federal Trade Commission (the "FTC") and
the United States Department of Justice (the "DOJ") the notification and report
form required pursuant to the HSR Act for the transactions contemplated hereby,
and will provide promptly upon request of the FTC or the DOJ or any other
Governmental Authority any supplemental information requested in connection
therewith. Purchasers and the Company will

                                     - 5 -
<PAGE>

use commercially reasonable efforts to obtain early termination of the waiting
period under the HSR Act. Purchasers and the Company shall furnish to the each
other such necessary information and reasonable assistance as the the other may
request in connection with its preparation of any filing or submission which is
necessary under the HSR Act or other applicable Law. Purchasers shall keep
Seller apprised of the status of any communications with, and inquiries or
requests for additional information from, the FTC and the DOJ or any other
Governmental Authority and shall comply promptly with any such inquiry or
request. In connection with the foregoing, Purchasers and the Company shall use
their respective reasonable commercial efforts to resolve objections, if any, as
may be asserted with respect to the transactions contemplated hereby under any
antitrust or trade or regulatory Laws of any Governmental Authority. In
complying with the foregoing, Purchasers and the Company shall use all
reasonable commercial measures available to consummate the transactions
contemplated hereby. Notwithstanding the foregoing or any other covenant or
agreement herein contained, in connection with the receipt of any necessary
approvals under the HSR Act or otherwise in respect of the transactions
contemplated hereby, neither any party hereto nor any of its respective
affiliates shall be required to: (i) divest or hold separate or otherwise take
or commit to take any action that limits such party's or affiliate's freedom of
action with respect to, or its ability to retain, administer or operate, any of
its assets, properties or business; or (ii) commence any litigation against any
person or entity in order to facilitate the consummation of any of the
transactions contemplated hereby.

6.    COMPANY MATTERS

      (a)   The Company hereby represents and warrants to, and covenants with,
the Purchasers and the Seller that:

            (i)   the Company is a corporation duly organized, validly existing
      and in good standing under the laws of the State of Delaware;

            (ii)  the Company has full legal right, power and authority to
      execute, deliver, and perform its obligations under this Agreement in
      accordance with their terms, and the execution, delivery and performance
      of its obligations under this Agreement by the Company have been duly
      authorized by all necessary action on behalf of the Company;

            (iii) this Agreement has been duly executed and delivered by the
      Company and constitutes a legally valid and binding agreement of the
      Company, enforceable against the Company in accordance with its terms;

            (iv)  no consent, approval, authorization or order or permit of any
      court, governmental agency or body or arbitrator having jurisdiction over
      the Company is required for the execution, delivery or performance by the
      Company of its obligations hereunder, except for any such consents,
      approvals, authorizations, orders or permits which the failure to obtain
      would not have or is not reasonably likely to have a material adverse
      effect on the Company;

            (v)   neither the execution and delivery of this Agreement by the
      Company nor the performance of the Company's obligations hereunder will
      violate, conflict with, result

                                     - 6 -
<PAGE>

      in a breach of, or constitute a default (or an event that, with the giving
      of notice or the lapse of time, or both, would constitute a default) under
      (A) the certificate of incorporation, bylaws or other organizational
      documents of the Company, or (B) any decree, judgment, order, law, rule,
      regulation or determination of any court, governmental agency or body or
      arbitrator having jurisdiction over the Company or any of its assets or
      properties, except for such violations, conflicts, breaches or defaults
      that would not have or are not reasonably likely to have a material
      adverse effect on the Company;

            (vi)   as of the date hereof, the Warrant is exercisable for 525,732
      shares of Common Stock (the "Warrant Shares");

            (vii)  the per share exercise price for each of the Warrant Shares
      is $0.61, for an aggregate exercise price for the Warrant Shares of
      $320,696.48;

            (viii) the Board of Directors of the Company has heretofore taken
      all necessary action to approve, and has approved, for purposes of Section
      203 of the Delaware General Corporation Law (including any successor
      statute thereto "Section 203") the Purchasers' becoming, together with
      their affiliates and associates, an "interested stockholder" within the
      meaning of Section 203 by virtue of the execution, delivery and
      performance of this Agreement, such that, as of the date hereof and from
      and after the Closing, Section 203 will not be applicable to any "business
      combination" within the meaning of Section 203 that may take place between
      one or more of the Purchasers and/or their respective affiliates and
      associates, on the one hand, and the Company, on the other, as a result of
      the transactions contemplated by this Agreement or otherwise;

            (ix)   the Company hereby acknowledges and agrees to the assignment
      of the Warrant to the Purchasers as contemplated by this Agreement and,
      upon the effectuation of such assignment, the Company shall treat the
      Purchasers as the holders of the Warrant so as to purchase such number of
      shares of Common Stock underlying the Warrant (as equitably adjusted from
      time to time in the event of any stock dividend, stock split,
      recapitalization, reclassification, recombination or the like) set forth
      opposite their respective names on Schedule I hereto for all purposes
      thereunder (notwithstanding any provision in the Warrant, including but
      not limited to Sections 5 and 9.2 thereof, to the contrary);

            (x)    the Company hereby acknowledges and agrees that this
      Agreement is the Securities Purchase Agreement by and among the Company,
      Seller and the Purchasers described in Section 1 of each of the warrants
      (the "Purchaser Warrants"), numbers W-16, W-17, W-18 and W-19, each dated
      as of March 15, 2004, issued by the Company to the Purchasers;

            (xi)   as of the time that the Purchaser Warrants were issued to the
      Purchasers, (A) the Company had full legal right, power and authority to
      execute, deliver and perform its obligations under the Purchaser Warrants
      in accordance with their respective terms, (B) the execution, delivery and
      performance of its obligations under the Purchaser Warrants by the Company
      were duly authorized by all necessary action on behalf of the

                                     - 7 -
<PAGE>

      Company and (C) no consent, approval, authorization or order or permit of
      any court, governmental agency or body or arbitrator having jurisdiction
      over the Company was required for the execution, delivery or performance
      by the Company of its obligations under the Purchaser Warrants;

            (xii)  the Purchaser Warrants have been duly executed and delivered
      by the Company and constitute legally valid and binding agreements of the
      Company, enforceable against the Company in accordance with their
      respective terms; and

            (xiii) neither the execution and delivery of the Purchaser Warrants
      by the Company nor the performance of the Company's obligations thereunder
      violate or will violate, conflict or will conflict with, resulted or will
      result in a breach of, or constituted or will constitute a default (or an
      event that, with the giving of notice or the lapse of time, or both,
      constituted or would constitute a default) under (1) the certificate of
      incorporation, bylaws or other organizational documents of the Company, or
      (2) any decree, judgment, order, law, rule, regulation or determination of
      any court, governmental agency or body or arbitrator having jurisdiction
      over the Company or any of its assets or properties.

      (b)   The Company acknowledges the receipt of adequate consideration for
the performance of its obligations under this Agreement.

7.    SURVIVAL OF REPRESENTATIONS AND WARRANTIES

      The respective agreements, representations, warranties, covenants and
other statements made by or on behalf each party hereto pursuant to this
Agreement shall remain in full force and effect, regardless of any investigation
made by or on behalf of any party, and shall survive delivery of and payment for
the Securities.

8.    TERMINATION

      (a)   This Agreement may be terminated at any time prior to the Closing:

            (i)   by the Purchasers, by notice to the Seller, if the Seller has
      materially breached any of its agreements or obligations hereunder or if
      any of the representations and warranties of the Seller was not true and
      correct in all material respects when made;

            (ii)  by the Seller, by notice to the Purchasers, if the Purchasers
      have materially breached any of their agreements or obligations hereunder
      or if any of the representations and warranties of the Purchasers was not
      true and correct in all material respects when made;

            (iii) by either the Seller or the Purchasers, if the FTC or the DOJ
      issues to any Purchaser a request for additional information or
      documentary material pursuant to Section 7A(e) of the Clayton Act (15
      U.S.C. Section 18a(e)); or

            (iv)  by either the Seller or the Purchasers, by notice to the
      other, if the Closing shall not have occurred by April 30, 2004;

                                     - 8 -
<PAGE>

provided that no party who has materially breached any of its covenants, or any
of whose representations and warranties was not true and correct when made,
shall be permitted to terminate this Agreement pursuant to this Section 8(a).

      (b)   In the event of the termination of this Agreement pursuant to
Section 8(a) above, this Agreement shall thereafter cease to be of any force or
effect; provided that such termination shall not relieve a party from liability
for any breach of this Agreement.

9.    GENERAL PROVISIONS

      (a)   Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of New York applicable to contracts made
and to be performed entirely within such State.

      (b)   Jurisdiction; Service of Process; No Jury Trial. With respect to any
claim arising out of this Agreement, the Seller and the Purchasers each
irrevocably submit to the exclusive jurisdiction of the courts of the State of
New York and the United States District Court located in the Borough of
Manhattan in New York City and agree that any disputes that may arise out of
this Agreement shall be litigated in such courts. The Seller and the Purchasers
each irrevocably waive any objection which they may have at any time to the
laying of venue of any suit, action or proceeding arising out of or relating to
this Agreement brought in any such court, irrevocably waive any claim that any
such suit, action or proceeding brought in any such court has been brought in an
inconvenient forum and further irrevocably waive the right to object, with
respect to any such suit, action or proceeding brought in any such court, that
such court does not have jurisdiction over such party. The Seller and the
Purchasers agree that service of process upon them in any such suit, action or
proceeding shall be deemed in every respect effective service of process upon
them if given in the manner set forth in Section 8(d). The Seller and the
Purchasers waive the right to a trial by jury in connection with any dispute
arising out of this Agreement.

      (c)   Interpretation. The headings of the sections and subsections of this
Agreement are inserted for convenience only and shall not be deemed to
constitute a part thereof. The parties have participated jointly in the
negotiation and drafting of this Agreement. In the event an ambiguity or
question of intent or interpretation arises, this Agreement shall be construed
as if drafted jointly by the parties and no presumption or burden of proof shall
arise favoring or disfavoring any party by virtue of the authorship of any
provisions of this Agreement.

      (d)   Notices. All communications under this Agreement shall be in writing
and shall be delivered by hand or facsimile or mailed by overnight courier or by
registered or certified mail, postage prepaid, as follows:

            (i)   if to the Purchasers:

                                     - 9 -
<PAGE>

                  Warburg Pincus Private Equity VIII, L.P.
                  Warburg Pincus Netherlands Private Equity VIII I C.V.
                  Warburg Pincus Netherlands Private Equity VIII II C.V.
                  Warburg Pincus Germany Private Equity VIII K.G.
                  c/o Warburg Pincus LLC
                  466 Lexington Avenue
                  New York, NY 10017
                  Attention: Jeffrey A. Harris
                  Fax No. 212-878-6139

                  with a copy to:

                  Willkie Farr & Gallagher LLP
                  787 Seventh Avenue
                  New York, NY 10019
                  Attention: Michael A. Schwartz, Esq.
                  Fax No. 212-728-9267

            (ii)  if to the Seller:

                  Xerox Imaging Services, Inc.
                  c/o Xerox Corporation
                  800 Long Ridge Road
                  Stamford, CT 06904
                  Attention: Chief Financial Officer
                  Fax No. 203-968-3991

                  with a copy to:

                  Xerox Corporation
                  800 Long Ridge Road
                  Stamford, CT 06904
                  Attention: General Counsel
                  Fax No. 203-968-3446

            (iii) if to the Company:

                  ScanSoft, Inc.
                  9 Centennial Drive
                  Peabody, MA 01960
                  Attention: General Counsel
                  Fax No. 203-968-3991

                                     - 10 -
<PAGE>

                  with a copy to:

                  Wilson Sonsini Goodrich & Rosati
                  650 Page Mill Road,
                  Palo Alto, CA 94304
                  Attention: Robert D. Sanchez, Esq.
                  Fax No. 650-493-6811

Any party hereto may from time to time change its address or fax number for
notices under this Section 8(d) by giving notice of such changed address to the
other parties hereto. Any notice addressed in accordance with this Section 8(d)
shall be deemed to be given: if delivered by hand or facsimile, on the date of
such delivery; if mailed by courier, on the first business day following the
date of such mailing; and if mailed by registered or certified mail, on the
third business day after the date of such mailing.

      (e)   Expenses and Taxes. All fees, costs and expenses incurred in
connection with this Agreement and the transactions contemplated hereby shall be
paid by the party incurring such fees, costs or expenses, provided that the
Seller shall reimburse the Purchasers for $22,500 of the total HSR Act filing
fee, and the Purchasers shall be entitled to retain $22,500 of the Purchase
Price in satisfaction of such reimbursement. The Purchasers will pay, and hold
the Seller harmless from any and all liabilities (including interest and
penalties) with respect to, or resulting from any delay or failure in paying,
stamp and other taxes (other than income taxes), if any, which may be payable or
determined to be payable on the execution and delivery of this Agreement.

      (f)   Publicity. Between the date hereof and the Closing Date, the parties
agree to consult with each other to coordinate the issuance of any press release
or similar public announcement or communication relating to the execution or
performance of this Agreement or to the transactions contemplated hereby.

      (g)   Successors and Assigns. This Agreement shall inure to the benefit of
and be binding upon the successors and assigns of each of the parties.

      (h)   Entire Agreement; Amendment. This Agreement constitutes the entire
understanding of the parties hereto and supersedes all prior understandings
among such parties, provided that nothing contained herein shall be deemed to
alter or modify the rights and obligations of the Company and the Purchasers
under the Purchaser Warrants. This Agreement may be amended with (and only with)
the written consent of the Seller and the Purchasers.

      (i)   Severability. If any term or provision of this Agreement or the
application of any such term or provision to any person or circumstance shall be
held invalid, illegal, void or unenforceable in any respect by a court of
competent jurisdiction, the remaining terms and provisions of this Agreement
shall remain in full force and effect, unless such invalidity, illegality,
voidness or unenforceability would substantially impair the benefits of such
remaining provisions of any party hereto.

                                     - 11 -
<PAGE>

      (j)   Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall be deemed an original and all of which
together shall be considered one and the same agreement.

                  [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                     - 12 -
<PAGE>

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

                                      SELLER

                                      XEROX IMAGING SYSTEMS, INC.

                                      By: /s/ Lawrence Zimmerman
                                          ------------------------------
                                          Name:  Lawrence Zimmerman
                                          Title: Vice President

                                      PURCHASERS

                                      WARBURG PINCUS PRIVATE EQUITY VIII, L.P.

                                      By: WARBURG PINCUS & CO.,
                                          its General Partner

                                      By: /s/ Jeffrey A. Harris
                                          ------------------------------
                                          Name:  Jeffrey A. Harris
                                          Title: Partner

                                      WARBURG PINCUS NETHERLANDS PRIVATE
                                        EQUITY VIII I C.V.

                                      By: WARBURG PINCUS & CO.,
                                          its General Partner

                                      By: /s/ Jeffrey A. Harris
                                          ------------------------------
                                          Name:  Jeffrey A. Harris
                                          Title: Partner

<PAGE>

                                      WARBURG PINCUS NETHERLANDS PRIVATE
                                        EQUITY VIII II C.V.

                                      By: WARBURG PINCUS & CO.,
                                          its General Partner

                                      By: /s/ Jeffrey A. Harris
                                          ------------------------------
                                          Name:  Jeffrey A. Harris
                                          Title: Partner

                                      WARBURG PINCUS GERMANY PRIVATE
                                        EQUITY VIII, K.G.

                                      By: WARBURG PINCUS & CO.,
                                          its General Partner

                                      By: /s/ Jeffrey A. Harris
                                          ------------------------------
                                          Name: Jeffrey A. Harris
                                          Title: Partner

                                      COMPANY

                                      SCANSOFT, INC.

                                      By: /s/ Paul A. Ricci
                                          ------------------------------
                                          Name: Paul A. Ricci
                                          Title: Chief Executive Office and
                                          Chairman of the Board

<PAGE>

                                   SCHEDULE I

<TABLE>
<CAPTION>
                                                           Number of             Number of             Number of
                      Purchaser                          Common Shares       Preferred Shares       Warrant Shares
                      ---------                          -------------       ----------------       --------------
<S>                                                      <C>                 <C>                    <C>
Warburg Pincus Private Equity VIII, L.P.                  11,487,326            3,452,165              509,487
Warburg Pincus Netherlands Private Equity VIII I C.V         195,347               58,706                8,664
Warburg Pincus Netherlands Private Equity VIII II C.V        137,620               41,357                6,104
Warburg Pincus Germany Private Equity VIII K.G                33,309               10,010                1,477
                                                          ----------            ---------              -------
                                   TOTALS                 11,853,602            3,562,238              525,732
</TABLE>

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