EXHIBIT 1.10


                          CALCULATION AGENCY AGREEMENT


                  AGREEMENT, dated as of May 22, 2001, between Lehman Brothers
Holdings Inc. (the "Company") and Lehman Brothers Inc., as Calculation Agent.

                  WHEREAS, the Company has authorized the issuance of
$30,000,000 aggregate principal amount of Nasdaq-100 Index(R) RANGERS PlusSM,
Risk AdjustiNG Equity Range Securities PlusSM Notes Due January 24, 2003 (the
"Securities")*;
                  WHEREAS, the Securities will be issued under an Indenture
Agreement dated as of September 1, 1987, between the Company and Citibank, N.A.,
as Trustee (the "Trustee"), as supplemented and amended by supplemental
indentures dated as of November 25, 1987, November 27, 1990, September 13, 1991,
October 4, 1993, October 1, 1995, and June 26, 1997, and incorporating Standard
Multiple Series Indenture Provisions dated July 30, 1987, as amended November
16, 1987 (collectively, the "Indenture"); and

                  WHEREAS, the Company requests the Calculation Agent to perform
certain services described herein in connection with the Securities;

                  NOW THEREFORE, the Company and the Calculation Agent agree as
follows:
                    1.  Appointment of Agent. The Company hereby appoints Lehman
               Brothers  Inc.  as  Calculation  Agent and Lehman  Brothers  Inc.
               hereby accepts such appointment as

*        The Nasdaq-100(R), Nasdaq-100 Index(R), and Nasdaq(R) are trade or
         service marks of The Nasdaq Stock Market, Inc. (which with its
         affiliates are the "Nasdaq Corporations") and are licensed for use by
         the Company. The Securities have not been passed on by the Nasdaq
         Corporations as to their legality or suitability. The Securities are
         not issued, endorsed, sold, or promoted by the Nasdaq Corporations. THE
         NASDAQ CORPORATIONS MAKE NO WARRANTIES AND BEAR NO LIABILITY WITH
         RESPECT TO THE SECURITIES.

         Risk AdjustiNG Equity Range Securities Plus and RANGERS Plus are
         service marks of Lehman Brothers Inc.


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               the  Company's  agent  for the  purpose  of  performing  the
               services hereinafter  described upon the terms and subject to the
               conditions hereinafter mentioned.

                    2. Calculations and Information  Provided.  In response to a
               request made by the Trustee for a  determination  of the Maturity
               Payment  Amount due at Stated  Maturity  of the  Securities,  the
               Calculation  Agent shall  determine such Maturity  Payment Amount
               and notify  the  Trustee of its  determination.  The  Calculation
               Agent shall also be responsible for (a) the  determination of the
               Maturity  Payment Amount,  (b) whether  adjustments to the Ending
               Index  Level  should  be  made,   (c)  the  Successor   Index  if
               publication of the Index is discontinued and (d) whether a Market
               Disruption Event has occurred. The Calculation Agent shall notify
               the Trustee of any such  adjustment or any such Successor  Index,
               or if a Market Disruption Event has occurred. Annex A hereto sets
               forth the procedures the Calculation  Agent will use to determine
               the information described in this Section 2.

                    3.  Calculations.  Any calculation or  determination  by the
               Calculation  Agent  pursuant  hereto  shall  (in the  absence  of
               manifest error) be final and binding. Any calculation made by the
               Calculation Agent hereunder shall, at the Trustee's  request,  be
               made available at the Corporate Trust Office.

                    4.  Fees  and  Expenses.  The  Calculation  Agent  shall  be
               entitled to reasonable  compensation for all services rendered by
               it as agreed to between the Calculation Agent and the Company.

                    5. Terms and Conditions.  The Calculation  Agent accepts its
               obligations  herein set out upon the terms and conditions hereof,
               including the following, to all of which the Company agrees:


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                    (i)  in acting under this Agreement,  the Calculation  Agent
                         is  acting  solely  as an  independent  expert  of  the
                         Company and does not assume any obligation  toward,  or
                         any relationship of agency or trust for or with, any of
                         the holders of the Securities;

                    (ii) unless  otherwise  specifically  provided  herein,  any
                         order, certificate, notice, request, direction or other
                         communication  from the Company or the Trustee  made or
                         given under any  provision of this  Agreement  shall be
                         sufficient if signed by any person who the  Calculation
                         Agent  reasonably  believes  to  be a  duly  authorized
                         officer  or  attorney-in-fact  of  the  Company  or the
                         Trustee, as the case may be;

                    (iii)the Calculation  Agent shall be obliged to perform only
                         such duties as are set out specifically  herein and any
                         duties necessarily incidental thereto;

                    (iv) the Calculation Agent,  whether acting for itself or in
                         any other capacity,  may become the owner or pledgee of
                         Securities with the same rights as it would have had if
                         it were not acting hereunder as Calculation Agent; and

                    (v)  the   Calculation   Agent  shall  incur  no   liability
                         hereunder  except for loss  sustained  by reason of its
                         gross negligence or wilful misconduct.

                    6.  Resignation;  Removal;  Successor.  (a) The  Calculation
               Agent  may at any time  resign by  giving  written  notice to the
               Company of such  intention  on its part,  specifying  the date on
               which its desired resignation shall become effective,  subject to
               the appointment of a successor  Calculation  Agent and acceptance
               of such  appointment  by such  successor  Calculation  Agent,  as
               hereinafter  provided.  The  Calculation  Agent  hereunder may be
               removed at any time by the  filing  with it of an  instrument  in
               writing signed by or on behalf of the Company and specifying such
               removal  and  the  date  when it  shall  become  effective.  Such
               resignation or removal shall take effect upon the  appointment by
               the Company, as hereinafter  provided, of a successor Calculation
               Agent and the  acceptance of such  appointment  by such successor
               Calculation Agent. In the event a successor Calculation Agent has
               not been appointed and has not accepted its duties within 90 days
               of the Calculation Agent's notice of resignation, the Calculation
               Agent may apply to any court of  competent  jurisdiction  for the
               designation of a successor Calculation Agent.


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(b)  In case at any  time  the  Calculation  Agent  shall  resign,  or  shall be
     removed, or shall become incapable of acting, or shall be adjudged bankrupt
     or  insolvent,  or make an  assignment  for the benefit of its creditors or
     consent  to  the  appointment  of a  receiver  or  custodian  of all or any
     substantial  part of its property,  or shall admit in writing its inability
     to pay or meet its debts as they  mature,  or if a receiver or custodian of
     it or all or any substantial part of its property shall be appointed, or if
     any public  officer  shall have taken charge or control of the  Calculation
     Agent or of its  property  or affairs,  for the purpose of  rehabilitation,
     conservation  or  liquidation,  a  successor  Calculation  Agent  shall  be
     appointed  by the  Company  by an  instrument  in  writing,  filed with the
     successor  Calculation  Agent.  Upon  the  appointment  as  aforesaid  of a
     successor   Calculation   Agent  and  acceptance  by  the  latter  of  such
     appointment,  the  Calculation  Agent  so  superseded  shall  cease  to  be
     Calculation Agent hereunder.


(c)  Any  successor   Calculation  Agent  appointed   hereunder  shall  execute,
     acknowledge  and  deliver to its  predecessor,  to the  Company  and to the
     Trustee an instrument accepting such appointment  hereunder and agreeing to
     be bound by the terms hereof,  and  thereupon  such  successor  Calculation
     Agent,  without any further act,  deed or  conveyance,  shall become vested
     with all the authority,  rights,  powers,  trusts,  immunities,  duties and
     obligations of such  predecessor with like effect as if originally named as
     Calculation  Agent  hereunder,  and such  predecessor,  upon payment of its
     charges and disbursements then unpaid,  shall thereupon become obligated to
     transfer,  deliver and pay over, and such successor Calculation Agent shall
     be entitled  to  receive,  all  moneys,  securities  and other  property on
     deposit with or held by such predecessor, as Calculation Agent hereunder.

(d)  Any corporation into which the Calculation Agent hereunder may be merged or
     converted  or any  corporation  with  which  the  Calculation  Agent may be

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     consolidated,  or any corporation resulting from any merger,  conversion or
     consolidation  to which  the  Calculation  Agent  shall be a party,  or any
     corporation to which the Calculation Agent shall sell or otherwise transfer
     all or  substantially  all of the assets and  business  of the  Calculation
     Agent shall be the successor Calculation Agent under this Agreement without
     the  execution or filing of any paper or any further act on the part of any
     of the parties hereto.

          7. Certain Definitions. Terms not otherwise defined herein or in Annex
     A hereto are used herein as defined in the Indenture or the Securities.


          8.  Indemnification.  The Company will indemnify the Calculation Agent
     against any losses or liability which it may incur or sustain in connection
     with its  appointment  or the  exercise of its powers and duties  hereunder
     except such as may result from the gross negligence or wilful misconduct of
     the  Calculation  Agent or any of its agents or employees.  The Calculation
     Agent shall incur no liability and shall be  indemnified  and held harmless
     by the  Company  for or in respect of any action  taken or  suffered  to be
     taken in good  faith by the  Calculation  Agent in  reliance  upon  written
     instructions from the Company.


          9.  Notices.  Any  notice  required  to be  given  hereunder  shall be
     delivered in person, sent (unless otherwise specified in this Agreement) by
     letter,  telex or  facsimile  transmission  or  communicated  by  telephone
     (confirmed in a writing  dispatched within two New York Business Days), (a)
     in the case of the  Company,  to it at Three World  Financial  Center,  New
     York,  New  York  10285  (facsimile:   (212)  526-3774)  (telephone:  (212)
     526-1936),  Attention:  Legal Counsel,  (b) in the case of the  Calculation
     Agent, to it at Three World Financial Center,  200 Vesey Street,  New York,
     New  York  10285-0600   (facsimile:   (212)  526-2755)  (telephone:   (212)
     526-0900), Attention: Equity Derivatives Trading and (c) in the case of the
     Trustee,  to it at 111 Wall  Street,  5th Floor,  New York,  New York 10043
     (facsimile:  (212)  657-3836)  (telephone:   (212)  657-7805),   Attention:

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     Corporate Trust  Department or, in any case, to any other address or number
     of which the party  receiving  notice shall have  notified the party giving
     such notice in writing.  Any notice hereunder given by telex,  facsimile or
     letter  shall  be  deemed  to be  served  when in the  ordinary  course  of
     transmission or post, as the case may be, it would be received.

          10.  Governing Law. This Agreement  shall be governed by and continued
     in accordance with the laws of the State of New York.


          11.  Counterparts.  This  Agreement  may be  executed in any number of
     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.

          12. Benefit of Agreement.  This Agreement is solely for the benefit of
     the parties hereto and their  successors  and assigns,  and no other person
     shall acquire or have any rights under or by virtue hereof.


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                  IN WITNESS WHEREOF, this Calculation Agency Agreement has been
entered into as of the day and year first above written.

                                         LEHMAN BROTHERS HOLDINGS INC.



                                         By:    /s/ Barrett S. DiPaolo
                                             -------------------------------
                                              Name: Barrett S. DiPaolo
                                              Title:Vice President



                                         LEHMAN BROTHERS INC.,
                                           as Calculation Agent



                                         By:    /s/ Barrett S. DiPaolo
                                             -------------------------------
                                              Name: Barrett S. DiPaolo
                                              Title:Vice President






                                     ANNEX A



1.       The Index.

         The Index is the Nasdaq-100 Index(R), as calculated by Nasdaq
         (the "Index").

2.       Determination of the Maturity Payment Amount.
         The Calculation Agent shall determine the Maturity Payment Amount.

3.       Discontinuance of the Index.


(a) If Nasdaq discontinues publication of the Index and Nasdaq or another entity
publishes a successor or substitute index (the "Successor Index") that the
Calculation Agent determines, in its sole discretion, to be comparable to the
discontinued Index, then the Calculation Agent shall calculate the Maturity
Payment Amount pursuant to Section 2 hereof by reference to the index level of
such Successor Index at the Close of Trading on the NYSE, AMEX, Nasdaq or the
relevant exchange or market for the Successor Index on the date that any Ending
Index Level is to be determined.

(b) Upon any selection by the Calculation Agent of a Successor Index, the
Company shall promptly give notice to the holders of the Securities.

(c) If Nasdaq discontinues publication of the Index prior to, and such
discontinuance is continuing on, the date that any Ending Index Level is to be
determined and the Calculation Agent determines that no Successor Index is
available at such time, then, on such date, the Calculation Agent shall
determine the Ending Index Level to be used in computing the Maturity Payment
Amount. The Ending Index Level shall be computed by the Calculation Agent in
accordance with the formula for and method of calculating the Index last in
effect prior to such discontinuance, using the Closing Level (or, if trading in
the relevant securities has been materially suspended or materially limited, its
good faith estimate of the Closing Level that would have prevailed but for such
suspension or limitation) at the close of the principal trading session on such
date of each security most recently comprising the Index on the primary
organized U.S. exchange or trading system.

4.       Alteration of Method of Calculation.

                  If at any time the method of calculating the Index or a
Successor Index, or the Ending Index Level thereof, is changed in a material
respect, or if the Index or a Successor Index is in any other way modified so
that such Index does not, in the opinion of the Calculation Agent, fairly
represent the value of the Index or such Successor Index had such changes or
modifications not been made, then, from and after such time, the Calculation
Agent will, at the Close of Trading in New York City on the date that the Ending
Index Level is to be determined, make such calculations and adjustments as, in
the good faith judgment of the Calculation Agent, may be necessary in order to
arrive at a level of a stock index comparable to the Index or such Successor
Index, as the case may be, as if such changes or modifications had not been
made, and calculate the Ending Index Level and the Maturity Payment Amount with
reference to the Index or such Successor Index, as adjusted. Accordingly, if the

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method of calculating the Index or a Successor Index is modified so that the
level of such index is a fraction of what it would have been if it had not been
modified (e.g., due to a split in the index), then the Calculation Agent shall
adjust such index in order to arrive at a level of the Index or such Successor
Index as if it had not been modified (e.g., as if such split had not occurred).

5.       Definitions.

                  Set forth below are the terms used in this Annex A to the
Calculation Agency Agreement.

                  "AMEX" shall mean the American Stock Exchange.

                  "Business Day" shall mean any day that is not a Saturday, a
Sunday or a day on which the NYSE or Nasdaq is not open for trading or banking
institutions or trust companies in the City of New York are authorized or
obligated by law or executive order to close.

                  "Calculation Agent" shall mean the person that has entered
into an agreement with the Company providing for, among other things, the
determination of the Maturity Payment Amount, which term shall, unless the
context otherwise requires, include its successors and assigns. The initial
Calculation Agent shall be Lehman Brothers Inc.

                  "Calculation Day" shall mean three Business Days prior to
January 24, 2003.

                  "Close of Trading" shall mean 4:00 p.m., New York City time.

                  "Closing Level" shall mean the last reported level of the
Index or the Successor Index, as the case may be, at 4:00 p.m., New York City
time, as reported by Nasdaq or the publisher of the Successor Index, as the case
may be.

                  "Ending Index Level" shall equal the Closing Level of the
Index or a Successor Index, as the case may be, on the Payment Determination
Date.

                  "Index" shall mean the Nasdaq-100 Index(R), as calculated by
Nasdaq.

                  "Market Disruption Event", on any day, shall mean any of the
following events as determined by the Calculation Agent:

                  (i) A suspension, absence or material limitation of trading in
         20% of more of the underlying stocks which then comprise the Index or
         any Successor Index, as the case may be, has occurred on that day, in
         each case, for more than two hours of trading or during the one-half
         hour period preceding the Close of Trading on the primary organized
         U.S. exchange or trading system on which such stocks are traded or, in
         the case of a common stock not listed or quoted in the United States,
         on the primary exchange, trading system or market for that security.
         Limitations on trading during significant market fluctuations imposed
         pursuant to the rules of any primary organized U.S. exchange or trading
         system similar to NYSE Rule 80B (or any applicable rule or regulation
         enacted or promulgated by the NYSE, any other exchange, trading system,
         or market, any other self regulatory organization or the Securities and
         Exchange Commission of similar scope as determined by the Calculation
         Agent), may be considered material. Notwithstanding the first sentence


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         of this paragraph, a Market Disruption Event for a security traded on a
         bulletin board means a suspension, absence or material limitation of
         trading of that security for more than two hours or during the one hour
         period preceding 4:00 p.m., New York City time.

                  (ii) A suspension, absence or material limitation has occurred
         on that day, in each case, for more than two hours of trading or during
         the one-half hour period preceding the Close of Trading in options
         contracts related to the Index or any Successor Index, as the case may
         be, whether by reason of movements in price exceeding levels permitted
         by an exchange, trading system or market on which such options
         contracts are traded or otherwise.

                  (iii) Information is unavailable on that date, through a
         recognized system of public dissemination of transaction information,
         for more than two hours of trading or during the one-half hour period
         preceding the Close of Trading, of accurate price, volume or related
         information in respect of 20% or more of the underlying stocks which
         then comprise the Index or any Successor Index, as the case may be, or
         in respect of options contracts related to the Index or any Successor
         Index, as the case may be, in each case traded on any major U.S.
         exchange or trading system or in the case of securities of a non-U.S.
         issuer, traded on the primary non-U.S. exchange, trading system or
         market.

         For purposes of determining whether a Market Disruption Event has
         occurred:

                  (i) a limitation on the hours or number of days of trading
         shall not constitute a Market Disruption Event if it results from an
         announced change in the regular business hours of the relevant
         exchange, trading system or market;

                  (ii) any suspension in trading in an options contract on the
         Index or any Successor Index, as the case may be, by a major securities
         exchange, trading system or market by reason of (a) a price change
         violating limits set by such securities market, (b) an imbalance of
         orders relating to those contracts, or (c) a disparity in bid and ask
         quotes relating to those contracts, shall constitute a Market
         Disruption Event notwithstanding that the suspension or material
         limitation is less than two hours;

                  (iii) a suspension or material limitation on an exchange,
         trading system or in a market shall include a suspension or material
         limitation of trading by one class of investors provided that the
         suspension continues for more than two hours of trading or during the
         last one-half hour period preceding the Close of Trading on the
         relevant exchange, trading system or market but shall not include any
         time when the relevant exchange, trading system or market is closed for
         trading as part of that exchange's, trading system's or market's
         regularly scheduled business hours; and

                  (iv)     "Trading systems" include bulletin board services.

                  "Maturity Payment Amount" shall mean, with respect to each
$1,000 principal amount of Securities, the following:


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                  If the Ending Index Level is at least 112% of the Starting
Index Level, the lesser of:

                  (1) $1,321; and

                  (2) the product of (a) $1,000 and (b)  Ending Index Level
                                                        --------------------
                                                        Starting Index Level

                  If the Ending Index Level is less than 112% of the Starting
Index Level, the lesser of:

                  (1) $1,120; and

                  (2) the sum of (a) $120 and (b) $1,000 x Ending Index Level
                                                           ------------------
                                                                1636.37

                  "Nasdaq" shall mean The Nasdaq Stock Market, Inc.
                  "NYSE" shall mean the New York Stock Exchange.

                  "Payment Determination Date" shall mean the Calculation Day,
unless a Market Disruption Event occurs on the Calculation Day, in which case
the first Business Day after the Calculation Day on which a Market Disruption
Event does not occur.

                  "Starting Index Level" shall equal 1925.14.

                  "Stated Maturity" shall mean January 24, 2003, or (i) if
January 24, 2003 is not a Business Day, the next Business Day, or (ii) if a
Market Disruption Event occurs on the Calculation Day, three Business Days after
the Payment Determination Date on which the Ending Index Level has been
determined.

                  "Successor Index" shall have the meaning set forth in Section
3(a).