CALCULATION AGENCY AGREEMENT

          CALCULATION AGENCY AGREEMENT, dated as of March 31, 2006 (the
"Agreement"), between Lehman Brothers Holdings Inc. (the "Company") and Lehman
Brothers Inc., as Calculation Agent.

          WHEREAS, the Company has authorized the issuance of up to $7,779,750
aggregate principal amount of Absolute Buffer Notes Due March 31, 2009, Linked
to the Nikkei 225(SM) Index (NKY) (the "Securities")*;

          WHEREAS, the Securities will be issued under an Indenture, 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 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 on
the Stated Maturity Date of the Securities, the Calculation Agent shall
determine such Maturity Payment Amount and notify the Trustee of its
determination. The Calculation Agent shall also determine (a) the Successor
Index if publication of the Index is discontinued, (b) the Closing Index Level
if no Successor Index is available or if NKS or the publisher of any Successor
Index, as the case may be, fails to calculate and publish a Closing Index Level
on any date, (c) adjustments to the Index, the Successor Index or the Closing
Index Level thereof if the method of calculating any of these items changes in a
material respect or if the Index or Successor Index is in any other way modified
so that it does not, in the opinion of the Calculation Agent, fairly represent
the level of the Index, or Successor Index, as the case may be, had such changes
or modifications not been

----------
*    "Nikkei" and "Nikkei 225" are the service marks of Nihon Keizai Shimbun,
     Inc. and have been licensed for use by the Company. The Securities, linked
     to the performance of the Nikkei 225 Index, are not sponsored, endorsed,
     sold or promoted by Nihon Keizai Shimbun, Inc., and Nihon Keizai Shimbun,
     Inc. makes no representation regarding the advisability of investing in the
     Securities.



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made, (d) adjustments to the Threshold Level, if required in order to reflect
adjustments made in the Index or Successor Index and (e) whether a Market
Disruption Event has occurred. The Calculation Agent shall notify the Trustee of
all such adjustments 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:

          (a) 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;

          (b) 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 whom 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;

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

          (d) 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

          (e) the Calculation Agent shall incur no liability hereunder except
     for loss sustained by reason of its gross negligence or willful 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



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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.

          (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
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 willful 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



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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 Business Days), (a) in the case of the
Company, to it at 745 Seventh Avenue, New York, New York 10019 (facsimile: (646)
758-3204) (telephone: (212) 526-7000), Attention: Treasurer, with a copy to 1301
Avenue of the Americas, New York, New York 10019 (facsimile: (212) 526-0357)
(telephone: (212) 526-7000), Attention: Corporate Secretary, (b) in the case of
the Calculation Agent, to it at 745 Seventh Avenue, New York, New York 10019
(facsimile: (646) 758-4942) (telephone: (212) 526-7000), Attention: Equity
Derivatives Trading and (c) in the case of the Trustee, to it at 388 Greenwich
Street, 14th Floor, New York, New York 10013 (facsimile: (212) 816-5527)
(telephone: (212) 816-5773), Attention: Agency and Trust, 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 construed
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.



          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/ James J. Killerlane III
                                                  ------------------------------
                                                  James J. Killerlane III
                                                  Vice President


                                              LEHMAN BROTHERS INC.,
                                              as Calculation Agent


                                              By: /s/ James J. Killerlane III
                                                  ------------------------------
                                                  James J. Killerlane III
                                                  Vice President

                         [Calculation Agency Agreement]



                                     ANNEX A

     1. The Index.

          The Index is the Nikkei 225(SM) Index (the "Index"), as calculated,
published and disseminated by Nihon Keizai Shimbun, Inc. ("NKS").

     2. Determination of the Maturity Payment Amount.

          The Calculation Agent shall, at the request of the Trustee, determine
the amount payable on the Stated Maturity Date for each $1,000 principal amount
of Securities (the "Maturity Payment Amount").

          The Maturity Payment Amount shall be the following:

          o    If the Final Index Return is zero or positive, $1,000 + ($1,000 x
               the Upside Participation Rate x the Final Index Return).

          o    If the Final Index Return is negative and the Final Index Level
               is equal to or greater than the Threshold Level, $1,000 + ($1,000
               x the absolute value of the Final Index Return).

          o    If the Final Index Return is negative and the Final Index Level
               is less than the Threshold Level, $1,000 + ($1,000 x the Final
               Index Return).

     3. Discontinuance of the Index.

     (a) If NKS discontinues publication of the Index and NKS or another entity
publishes a successor or substitute index (the "Successor Index") that the
Calculation Agent determines, in its sole discretion exercised in good faith, to
be comparable to the discontinued Index, then the Calculation Agent shall
determine each subsequent Closing Index Level to be used in computing the
Maturity Payment Amount by reference to the Closing Index Level of such
Successor Index on the applicable date.

     (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 NKS discontinues publication of the Index and the Calculation Agent
determines that no Successor Index is available at such time, or if NKS (or the
publisher of any Successor Index) fails to calculate and publish a Closing Index
Level for the Index (or a Successor Index) on any date when it would ordinarily
do so in accordance with its customary practice, the Calculation Agent will
determine the Closing Index Level to be used for purposes of computing the
Maturity Payment Amount. In such circumstances, the Closing Index Level will be
computed by the Calculation Agent in accordance with the formula for and method
of calculating the Index (or any Successor Index) last in effect prior to such
discontinuance or failure to publish, using the Closing Index Level (or, if
trading in any of the relevant securities has been materially suspended or
materially limited, its good faith estimate of the Closing Price that would have
prevailed but for such suspension or limitation) on such date of each security
most recently



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comprising the Index (or any Successor Index) on the Relevant Exchange on which
such Security trades.

     4. Alteration of Method of Calculation.

          If at any time the method of calculating the Index, any Successor
Index or the Closing Index Level thereof on any particular day, 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 level of the Index or such Successor Index had such changes
or modifications not been made, then, from and after such time, the Calculation
Agent shall, at the Close of Trading of the Relevant Exchanges on which the
securities comprising the Index or such Successor Index traded on any date the
Closing Index Level thereof 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. The Calculation Agent shall calculate the Closing Index Level
on any particular day and the Maturity Payment Amount with reference to the
Index or such Successor Index, as adjusted.

          Accordingly, if the 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, 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.

     5. Definitions.

          Set forth below are the terms used in the Agreement and in this Annex
A.

          "Agreement" shall have the meaning set forth in the preamble to this
Agreement.

          "AMEX" shall mean the American Stock Exchange LLC.

          "Business Day", notwithstanding any provision in the Indenture, shall
mean any day that is not a Saturday, a Sunday or a day on which the NYSE, Nasdaq
or AMEX 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.

          "Close of Trading" shall mean, in respect of any Relevant Exchange,
the scheduled weekday closing time on a day on which the Relevant Exchange is
scheduled to be open for trading for its respective regular trading session,
without regard to after hours or any other trading outside of the regular
trading session hours.



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          "Closing Index Level" shall mean, with respect to any day, in the case
of the Index or any Successor Index, the closing level of the Index or the
Successor Index, as the case may be, as reported by NKS or the publisher of the
Successor Index, as the case may be, on such day or as determined by the
Calculation Agent pursuant to this Agreement.

          "Closing Price" shall mean, with respect to a security on any day, the
last reported sales price for that security on the Relevant Exchange at the
scheduled weekday closing time of the regular trading session of the Relevant
Exchange; provided, however, if such security is not listed or traded on a
bulletin board, then the "Closing Price" of the security shall be determined
using the average execution price per share that an affiliate of the Company
pays or receives upon the purchase or sale of the security used to hedge the
Company's obligations under the Securities.

          "Company" shall have the meaning set forth in the preamble to this
Agreement.

          "Final Index Level" shall equal the Closing Index Level on the
Valuation Date.

          "Final Index Return" shall equal the following:

                     Final Index Level - Initial Index Level
                     ---------------------------------------
                               Initial Index Level

          "Indenture" shall have the meaning set forth in the preamble to this
Agreement.

          "Index" shall have the meaning set forth in Section 1 of this Annex A.

          "Initial Index Level" shall equal 16690.24, the Closing Index Level on
March 28, 2006.

          "Market Disruption Event", with respect to the Index or any Successor
Index shall mean any of the following events has occurred on any day as
determined by the Calculation Agent in its sole discretion:

     (1) A material suspension of or limitation imposed on trading relating to
     the securities that then comprise 20% or more of the Index or any Successor
     Index, by the Relevant Exchanges on which those securities are traded, at
     any time during the one-hour period that ends at the Close of Trading on
     such day, whether by reason of movements in price exceeding limits
     permitted by that Relevant Exchange or otherwise.

     (2) A material suspension of, or limitation imposed on, trading in futures
     or options contracts relating to the Index or any Successor Index by the
     primary exchange or quotation system on which those futures or options
     contracts are traded, at any time during the one-hour period that ends at
     the Close of Trading on such day, whether by reason of movements in price
     exceeding limits permitted by the exchanges or otherwise.

     (3) Any event, other than an early closure, that disrupts or impairs the
     ability of market participants in general to effect transactions in, or
     obtain market values for, the securities that then comprise 20% or more of
     the Index or any Successor Index on the



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     Relevant Exchanges on which those securities are traded, at any time during
     the one-hour period that ends at the Close of Trading on that day.

     (4) Any event, other than an early closure, that disrupts or impairs the
     ability of market participants in general to effect transactions in, or
     obtain market values for, the futures or options contracts relating to the
     Index or any Successor Index on the primary exchange or quotation system on
     which those futures or options contracts are traded at any time during the
     one-hour period that ends at the Close of Trading on that day.

     (5) The closure of the Relevant Exchanges on which securities that then
     comprise 20% or more of the Index or any Successor Index are traded or on
     which futures or options contracts relating to the Index or any Successor
     Index are traded prior to its scheduled closing time unless the earlier
     closing time is announced by the Relevant Exchanges at least one hour prior
     to the earlier of (i) the actual closing time for the regular trading
     session on the Relevant Exchanges and (ii) the submission deadline for
     orders to be entered into the Relevant Exchanges for execution at the Close
     of Trading on that day.

For purposes of determining whether a Market Disruption Event has occurred, the
relevant percentage contribution of a security to the level of the Index or any
Successor Index will be based on a comparison of (x) the portion of the level of
the Index or Successor Index attributable to that security and (y) the overall
level of the Index or Successor Index, in each case immediately before the
occurrence of the Market Disruption Event.

          "Maturity Payment Amount" shall have the meaning set forth in Section
2 of this Annex A.

          "Nasdaq" shall mean The Nasdaq Stock Market, Inc.

          "NKS" shall have the meaning set forth in Section 1 of this Annex A.

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

          "Relevant Exchange" shall mean, for any security (or any combination
thereof then underlying the Index or any Successor Index), the primary exchange,
quotation system (which includes bulletin board services) or other market of
trading for such security.

          "Scheduled Trading Day" shall mean any day on which both the Tokyo
Stock Exchange and the Osaka Securities Exchange are scheduled to be open for
trading for their respective regular trading sessions.

          "Securities" shall have the meaning set forth in the preamble to this
Agreement.

          "Stated Maturity Date" shall mean March 31, 2009 (or if March 31, 2009
is not a Business Day, on the next Business Day); provided, that if the
Valuation Date is postponed, the Stated Maturity Date shall be the third
Business Day following the date that the Final Index Level on the postponed
Valuation Date is determined.



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

          "Threshold Level" shall mean 15021.216, as it may be adjusted from
time to time by the Calculation Agent to the extent it believes appropriate, in
a manner consistent with the adjustments to the method of calculation of the
Index or a Successor Index described in Sections 3 and 4 of this Annex A and
under the circumstances described in Sections 3 and 4 of this Annex A.

          "Trustee" shall have the meaning set forth in the preamble to this
Agreement.

          "Upside Participation Rate" shall mean 157%.

          "Valuation Date" shall mean March 26, 2009; provided, that if a Market
Disruption Event occurs on such day or if such day is not a Scheduled Trading
Day, then the Valuation Date shall be the next following Scheduled Trading Day
on which no Market Disruption Event occurs; provided, however, if a Market
Disruption Event occurs on each of the eight Scheduled Trading Days following
the originally scheduled Valuation Date, then (a) that eighth Scheduled Trading
Day shall be deemed the Valuation Date and (b) the Calculation Agent shall
determine the Final Index Level based upon its good faith estimate of the level
of the Index on that eighth Scheduled Trading Day.