CRUDE OIL-LINKED SINGLE BARRIER SYNTHETIC REVERSE CONVERTIBLE NOTE DUE NOVEMBER 23, 2007

Exhibit 4.03

CUSIP NO. 52517PP47

ISIN NO. US52517PP477

LEHMAN BROTHERS HOLDINGS INC.

MEDIUM-TERM NOTE, SERIES I

CRUDE OIL-LINKED SINGLE BARRIER SYNTHETIC REVERSE CONVERTIBLE NOTE
DUE NOVEMBER 23, 2007

THIS NOTE IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITORY OR A NOMINEE OF THE DEPOSITORY.  UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK) TO THE COMPANY (AS DEFINED BELOW) OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR NOTES IN CERTIFICATED FORM (A “CERTIFICATED NOTE”), THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY THE DEPOSITORY TO A NOMINEE OF THE DEPOSITORY OR BY A NOMINEE OF THE DEPOSITORY TO THE DEPOSITORY OR ANOTHER NOMINEE OF THE DEPOSITORY OR BY THE DEPOSITORY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITORY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITORY.

LEHMAN BROTHERS HOLDINGS INC., a corporation duly organized and existing under the laws of the State of Delaware (herein called the “Company,” which term includes any successor corporation under the Indenture referred to on the reverse hereof), for value received, hereby promises to pay to CEDE & Co., or registered assigns, on the Maturity Date, an amount equal to the Redemption Amount. 

The “Maturity Date” is November 23, 2007, or if such day is not a Business Day, on the next following Business Day.

The “Redemption Amount” is the amount equal to the sum of (a) the principal amount of the Notes plus (b) the Fixed Return plus (c) if Crude OilREF is equal to or less than the Lower Barrier on any Exchange Business Day during the Observation Period, the Principal Adjustment Amount.

The “Fixed Return” is a single U.S. Dollar payment equal to the principal amount of the Notes multiplied by 9.05%.

The “Principal Adjustment Amount” is an amount equal to the principal amount of the Notes multiplied by the lesser of (a) the Crude Oil Return, and (b) 0%.

The “Observation Period” is the period from and including the Trade Date to and including the Valuation Date.

The “Trade Date” is November 14, 2006.

The “Valuation Date” is 5 Exchange Business Days prior to the Maturity Date; provided that, if a Disruption Event is in effect on the scheduled Valuation Date, the Valuation Date may be postponed (as described below).

“Crude OilREF” is, for any Exchange Business Day within the Observation Period, the Crude Oil Price on such Exchange Business Day.  Crude OilREF on the Valuation Date shall equal the Final Crude Oil Price.

“Crude Oil” is light sweet crude oil.

The “Crude Oil Contract” is the December 2007 futures contract for Crude Oil, which is the Crude Oil futures contract scheduled for settlement in December 2007, traded on the Relevant Exchange.

The “Lower Barrier” is $49.8525, equal to the Crude Oil Strike multiplied by 75%.

The “Crude Oil Strike” is $66.47, equal to the Crude Oil Price on the Trade Date.

The “Final Crude Oil Price” is the Crude Oil Price on the Valuation Date.

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The “Crude Oil Return” is a quotient, (x) the numerator of which is the Final Crude Oil Price minus the Crude Oil Strike and (y) the denominator of which is the Crude Oil Strike.

The “Relevant Exchange” is the NYMEX Division, or its successor, of the New York Mercantile Exchange, Inc., or its successor; or, if NYMEX is no longer the principal exchange or trading market for Crude Oil options or futures contracts, such other exchange or principal trading market for Crude Oil as determined in good faith by the Calculation Agent which serves as the source of prices for Crude Oil, and any principal exchanges where options or futures contracts on Crude Oil are traded.

An “Exchange Business Day” is a day, as determined by the Calculation Agent, on which the Relevant Exchange is scheduled to be (or, but for the occurrence of a Disruption Event, would have been) open for trading during its regular trading session (notwithstanding the Relevant Exchange closing prior to its scheduled closing time).

If a Disruption Event identified in clauses (A), (B) or (C) below is in effect on any Exchange Business Day during the Observation Period to but excluding the earlier of (i) the Valuation Date and (ii) the Exchange Business Day on which Crude OilREF was first equal to or less than the Lower Barrier, the Calculation Agent will determine Crude OilREF applicable to such Exchange Business Day in accordance with the Fallback Price Determination below.  If a Disruption Event identified in clauses (D) or (E) below is in effect on any such Exchange Business Day, the Calculation Agent will determine Crude OilREF applicable to such Exchange Business Day in its sole and absolute discretion taking into account the latest available quotation for the Crude Oil Price and any other information that in good faith it deems relevant.

If Crude OilREF was equal to or less than the Lower Barrier on any Exchange Business Day during the Observation Period and, on the Valuation Date, a Disruption Event identified in clauses (A), (B) or (C) below is in effect, the Valuation Date will be postponed to, and the Calculation Agent will determine the Final Crude Oil Price on, the first Exchange Business Day succeeding the Valuation Date on which no Disruption Event is occurring; provided that if a Disruption Event is occurring on each of the three scheduled Exchange Business Days succeeding the Valuation Date, such third scheduled Exchange Business Day shall be deemed the Valuation Date and the Calculation Agent will determine the Final Crude Oil Price on such third scheduled Exchange Business Day succeeding the Valuation Date in accordance with the Fallback Price Determination below.  If Crude OilREF was less than or equal to the Lower Barrier on any Exchange Business Day during the Observation Period and, on the Valuation Date, a Disruption Event identified in clauses (D) or (E) below is in effect, the Calculation Agent will determine the Final Crude Oil Price on the Valuation Date in its sole and absolute discretion, taking into account the latest available quotation for the settlement price of the Crude Oil Contract and any other information that in good faith it deems relevant.

A “Disruption Event” means any of the following events as determined in good faith by the Calculation Agent:

(A)   the suspension of or material limitation on trading in the Crude Oil Contract or Crude Oil, or futures contracts or options related to the Crude Oil Contract or Crude Oil, on the Relevant Exchange;

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(B)   either (i) the failure of trading to commence, or permanent discontinuance of trading, in the Crude Oil Contract or Crude Oil, or futures contracts or options related to the Crude Oil Contract or Crude Oil, on the Relevant Exchange, or (ii) the disappearance of, or of trading in, Crude Oil;

(C)   the failure of the Relevant Exchange to publish the official daily settlement price for that day for the Crude Oil Contract (or the information necessary for determining the settlement price);

(D)   the occurrence since the Trade Date of a material change in the content, composition, or constitution of Crude Oil or the Crude Oil Contract; or

(E)   the occurrence since the Trade Date of a material change in the formula for or the method of calculating the settlement price of the Crude Oil Contract.

For the purpose of determining whether a Disruption Event has occurred:

(1)   a limitation on the hours in a trading day and/or number of days of trading will not constitute a Disruption Event if it results from an announced change in the regular business hours of the Relevant Exchange;