LOEWS CORP
8-A12B, 1997-09-18
FIRE, MARINE & CASUALTY INSURANCE
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                                  UNITED STATES
                        SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, D.C. 20549

                                                             

                                     FORM 8-A

                FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                     PURSUANT TO SECTION 12(B) OR (G) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                                                             

                                LOEWS CORPORATION
                                                                                
              (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                     DELAWARE                              13-2646102
                                                                                
          (STATE OF INCORPORATION OR ORGANIZATION)        (IRS EMPLOYER
                                                       IDENTIFICATION NO.)

                667 MADISON AVENUE
                NEW YORK, NEW YORK                         10021-8087
                                                                               
          (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)         (ZIP CODE)

           SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:

                TITLE OF EACH CLASS         NAME OF EACH EXCHANGE ON WHICH
                TO BE SO REGISTERED         EACH CLASS IS TO BE REGISTERED    

         3 1/8% EXCHANGEABLE SUBORDINATED
                  NOTES DUE 2007                NEW YORK STOCK EXCHANGE
                                                                               

       If this Form relates to the registration of a class of securities 
pursuant to Section 12(b) of the Exchange Act and is effective pursuant to
General Instruction A.(c) please check the following box:  /X/            

       If this Form relates to the registration of a class of securities
pursuant to Section 12(g) of the Exchange Act and is effective pursuant to
General Instruction A.(d) please check the following box:  / /

           SECURITIES ACT REGISTRATION STATEMENT FILE NUMBER TO WHICH THIS
FORM RELATES:            (if applicable)
              ----------

           SECURITIES TO BE REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT:

                                       NONE
                                                                             
                                 (TITLE OF CLASS)<PAGE>





                  INFORMATION REQUIRED IN REGISTRATION STATEMENT


         ITEM 1.   DESCRIPTION OF REGISTRANT'S SECURITIES TO BE
                   REGISTERED.

              The material set forth in the Section captioned
         "Description of the Notes" in the Registrant's Prospectus
         Supplement, dated September 16, 1997, filed with the Commission
         on September 16, 1997 pursuant to Rule 424(b)(5), is hereby
         incorporated by reference.

         ITEM 2. EXHIBITS.

                   1.     Form of Registrant's 3 1/8% Exchangeable
                          Subordinated Notes Due 2007 (included in
                          Exhibit 5).

                *  2.     Indenture, dated as of December 1, 1985,
                          between the Registrant and The Chase Manhattan
                          Bank (National Association) (as successor by
                          merger to Chemical Bank, a New York
                          corporation, successor by merger to
                          Manufacturers Hanover Trust Company), as
                          Trustee (the "Trustee").

               **  3.     First Supplemental Indenture, dated as of
                          February 18, 1997, between the Registrant and
                          the Trustee.

              ***  4.     Second Supplemental Indenture, dated as of
                          February 18, 1997, between the Registrant and
                          the Trustee.

                   5.     Form of Third Supplemental Indenture, dated as
                          of September    , 1997, between the Registrant
                          and the Trustee.

                                                 
           -------------------------
                *  Incorporated by reference to Exhibit 4.5 to
                   Registrant's Registration Statement on Form S-3
                   (Registration No. 333-22113) filed February 20, 1997
                   (the "Registration Statement").

               **  Incorporated by reference to Exhibit 4.7 to the
                   Registration Statement.

              ***  Incorporated by reference to Exhibit 4.8 to the
                   Registration Statement.






                                     Page 2 of 4<PAGE>





                                    SIGNATURE

              Pursuant to the requirements of Section 12 of the
         Securities Exchange Act of 1934, the registrant has duly caused
         this registration statement to be signed on its behalf by the
         undersigned, thereto duly authorized.

                                            LOEWS CORPORATION



         Dated:  September 17, 1997         By: /s/ Peter W. Keegan         
                                                ---------------------------
                                                Name:   Peter W. Keegan
                                                Title:  Senior Vice President
                                                        and Chief Financial
                                                        Officer










































                                     Page 3 of 4<PAGE>





                                   EXHIBIT LIST


                   1.     Form of Registrant's 3 1/8% Exchangeable
                          Subordinated Notes Due 2007 (included in
                          Exhibit 5).

                *  2.     Indenture, dated as of December 1, 1985,
                          between the Registrant and The Chase Manhattan
                          Bank (National Association) (as successor by
                          merger to Chemical Bank, a New York
                          corporation, successor by merger to
                          Manufacturers Hanover Trust Company), as
                          Trustee (the "Trustee").

               **  3.     First Supplemental Indenture, dated as of
                          February 18, 1997, between the Registrant and
                          the Trustee.

              ***  4.     Second Supplemental Indenture, dated as of
                          February 18, 1997, between the Registrant and
                          the Trustee.

                   5.     Form of Third Supplemental Indenture, dated as
                          of September    , 1997, between the Registrant
                          and the Trustee.

                                                 
           -------------------------
                *  Incorporated by reference to Exhibit 4.5 to
                   Registrant's Registration Statement on Form S-3
                   (Registration No. 333-22113) filed February 20, 1997
                   (the "Registration Statement").

               **  Incorporated by reference to Exhibit 4.7 to the
                   Registration Statement.

              ***  Incorporated by reference to Exhibit 4.8 to the
                   Registration Statement.

















                                     Page 4 of 4



                                                       
                                                        Exhibit 5



                   THIS THIRD SUPPLEMENTAL INDENTURE, dated as of
         September 16, 1997, is between LOEWS CORPORATION, a Delaware
         corporation (the "Company"), and THE CHASE MANHATTAN BANK, a
         New York corporations, successor by merger to Chemical Bank,
         successor by merger to Manufacturers Hanover Trust Company, as
         trustee (herein called the "Trustee").


                              PRELIMINARY STATEMENT

                   The Company and the Trustee have entered into an
         Indenture dated as of December 1, 1985 and a First and Second
         Supplemental Indenture thereto, each dated as of February 18,
         1997 (such Indenture, as supplemented is herein called the
         "Indenture").

                   Capitalized terms used but not otherwise defined
         herein, shall have the meanings given them in the Indenture.

                   Section 201 of the Indenture permits the form of the
         Debt Securities of any series to be established pursuant to an
         indenture supplemental to the Indenture.

                   Section 301 of the Indenture permits the terms of the
         Debt Securities of any series to be established in an indenture
         supplemental to the Indenture.

                   Section 901(6) of the Indenture provides that a
         supplemental indenture may be entered into by the Company and
         the Trustee without the consent of any Holders of Debt
         Securities to establish the form and terms of Debt Securities
         of any series as permitted by Sections 201 and 301.  In
         accordance with the terms of Sections 901(6) of the Indenture,
         the Company has, by Board Resolution, authorized this Third
         Supplemental Indenture.  The Trustee has determined that this
         Third Supplemental is in form satisfactory to it.

                   All things necessary to make this Third Supplemental
         Indenture a valid agreement of the Company and the Trustee and
         a valid amendment of and supplement to the Indenture have been
         done.

                   NOW, THEREFORE, THIS THIRD SUPPLEMENTAL INDENTURE
         WITNESSETH:

                   For and in consideration of the premises, it is
         mutually covenanted and agreed, for the equal and proportionate
         benefit of all Holders of the Debt Securities of the series to
         be created hereby, as follows:

                   1.  Definitions.<PAGE>





                   For all purposes of the Indenture and this Third
         Supplemental Indenture, with respect to the Securities of the
         series created hereby, except as otherwise expressly provided
         or unless the context otherwise requires:

                   The "Average Market Value" of the Diamond Offshore
         Common Stock on any date of computation means the arithmetic
         average of the daily volume weighted average price of the
         Diamond Offshore Common Stock, as reported on the New York
         Stock Exchange Consolidated Tape, or if the Diamond Offshore
         Common Stock is not then listed on the New York Stock Exchange,
         as reported by the principal securities exchange or interdealer
         quotations system on which the Diamond Offshore Common Stock is
         then traded, for the 30-Trading Day period ending two Trading
         Days prior to such date of computation as computed by the
         Quotation Agent.

                   The "Average Market Value Amount" per $1,000
         principal amount of Notes means the greater of (A) $1,000 and
         (B) the product of (i) the then-prevailing Exchange Rate and
         (ii) the Average Market Value of the Diamond Offshore Common
         Stock as of the date of computation.

                   "Cash Distribution" means the distribution by Diamond
         Offshore to all holders of Diamond Offshore Common Stock of
         cash, other than any cash that is distributed upon a merger or
         consolidation to which Section 4.11 of this Supplemental
         Indenture applies or as part of a distribution referred to in
         paragraph (4) of Section 4.4 of this Supplemental Indenture.

                   "Closing Price" of the Diamond Offshore Common Stock
         on any date means the price, as of the close of business on
         such date, of the Diamond Offshore Common Stock, as reported on
         the New York Stock Exchange Consolidated Tape, or if the
         Diamond Offshore Common Stock is not then listed on the New
         York Stock Exchange, as reported by the principal securities
         exchange or interdealer quotation system on which the Diamond
         Offshore Common Stock is then traded.

                   "common stock" includes any stock of any class of
         capital stock which has no preference in respect of dividends
         or of amounts payable in the event of any voluntary or
         involuntary liquidation, dissolution or winding up of the
         issuer thereof and which is not subject to redemption by the
         issuer thereof.

                   "Determination Date" means, in the case of a dividend
         or other distribution, including the issuance of rights,
         options or warrants, to shareholders, the date fixed for the
         determination of shareholders entitled to receive such dividend
         or other distribution and, in the case of a tender offer, the
         last time that tenders could have been




                                       -2-<PAGE>





         made pursuant to such tender offer.

                   "Diamond Offshore" means Diamond Offshore Drilling,
         Inc., a Delaware corporation and a subsidiary of the Company.

                   "Diamond Offshore Common Stock" means the Common
         Stock, $.01 par value per share, of Diamond Offshore authorized
         at the date of this instrument as originally executed.  Subject
         to the provisions of Section 4.11 of this Supplemental
         Indenture, shares issuable on exchange of Notes shall include
         only shares of Common Stock or shares or any class or classes
         of common stock resulting from any reclassification or
         reclassifications thereof; provided, however, that if at any
         time there shall be more than one such resulting class, the
         shares so issuable on exchange of Notes shall include shares of
         all such classes, and the shares of each such class then so
         issuable shall be substantially in the proportion which the
         total number of shares of such class resulting from all such
         reclassifications bears to the total number of shares of all
         such classes resulting from all such reclassifications.

                   "Excess Purchase Payment" means the excess, if any,
         of (i) the amount of cash plus the fair market value (as
         determined by the Board of Directors, whose determination shall
         be conclusive and described in a Board Resolution) of any non-
         cash consideration required to be paid with respect to one
         share of Diamond Offshore Common Stock acquired or to be
         acquired in a tender offer made by Diamond Offshore or any
         subsidiary of Diamond Offshore for all or any portion of the
         Diamond Offshore Common Stock over (ii) the current market
         price per share as of the last time that tenders could have
         been made pursuant to such tender offer.

                   "Exchange Rate" has the meaning set forth in Section
         4.1 of this Supplemental Indenture.

                   "Market Capitalization" means, with respect to a
         specified date, the product of (i) the current market price per
         share (determined as provided in paragraph (8) of Section 4.4
         of this Supplemental Indenture) of the Diamond Offshore Common
         Stock as of such date times (ii) the number of shares of
         Diamond Offshore Common Stock outstanding on such date.

                   "Notes" means any Debt Securities of the series of
         Debt Securities entitled "3_% Exchangeable Subordinated Notes
         due 2007" created by this Supplemental Indenture.

                   "Quotation Agent" means the Trustee and its
         successors or substitutes.







                                       -3-<PAGE>





                   "Trading Day" means any day on which the Diamond
         Offshore Common Stock (i) is not suspended from trading on the
         principal securities exchange or interdealer quotation system
         on which it is traded at the close of business and (ii) has
         traded at least once on such principal securities exchange or
         interdealer quotation system.

                   2.  Form of Notes.

                   2.1.  The Notes shall be in the form set forth in
         this Section.

                   2.2.  Form of Face of Notes.  

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

                                LOEWS CORPORATION

                   3_% EXCHANGEABLE SUBORDINATED NOTE DUE 2007

         No. _____________                                        $_____

         CUSIP NO. - ________________


                   LOEWS CORPORATION, a corporation duly organized and
         existing under the laws of Delaware (herein called the
         "Company", which term includes any successor Person under the
         Indenture referred to on the reverse hereof), for value
         received, hereby promises to pay to _______________, or
         registered assigns, the principal sum of _____________ Dollars
         ($_____) on September 15, 2007 and to pay interest thereon,
         from September 16, 1997, or from the most recent Interest
         Payment Date to which interest has been paid or duly provided
         for, semi-annually on March 15 and September 15 in each year,
         commencing March 15, 1998, at the rate of 3_% per annum,








                                       -4-<PAGE>





         until the principal hereof is due, and at the rate of 3_% per
         annum on any overdue principal and premium, if any, and, to the
         extent permitted by law, on any overdue interest.  The interest
         so payable, and punctually paid or duly provided for, on any
         Interest Payment Date will, as provided in the Indenture, be
         paid to the Person in whose name this Note (or one or more
         Predecessor Securities) is registered at the close of business
         on the Regular Record Date for such interest, which shall be
         the March 1 or September 1 (whether or not a Business Day), as
         the case may be, next preceding such Interest Payment Date.
         Except as otherwise provided in the Indenture, any such
         interest not so punctually paid or duly provided for will
         forthwith cease to be payable to the Holder on such Regular
         Record Date and may either be paid to the Person in whose name
         this Note (or one or more Predecessor Securities) is registered
         at the close of business on a Special Record Date for the
         payment of such Defaulted Interest to be fixed by the Company,
         notice whereof shall be given to Holders of Notes not less than
         10 days prior to such Special Record Date, or be paid at any
         time in any other lawful manner not inconsistent with the
         requirements of any securities exchange on which the Notes may
         be listed, and upon such notice as may be required by such
         exchange, all as more fully provided in the Indenture.  Payment
         of the principal of (and premium, if any, on) this Note shall
         be made upon the surrender of this Note at the option of the
         Holder at the office or agency of the Company as may be
         designated by it for such purpose in the Borough of Manhattan,
         The City of New York, in such coin or currency of the United
         States of America as at the time of payment shall be legal
         tender for the payment of public and private debts, or at such
         other offices or agencies as the Company may designate.
         Payment of interest on this Note may be made by check mailed to
         the address of the Person entitled thereto as such address
         shall appear in the Security Register.

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

                   Unless the certificate of authentication hereon has
         been executed by the Trustee referred to on the reverse hereof
         by manual signature, this Note shall not be entitled to any
         benefit under the Indenture or be valid or obligatory for any
         purpose.

                   IN WITNESS WHEREOF, the Company has caused this Note
         to be duly executed under its corporate seal.

         Dated:

                                            LOEWS CORPORATION




                                       -5-<PAGE>





         By:_______________________
                                            Name:
                                            Title:

         Attest:



         ________________________
         Name:
         Title:


                   2.3  Form of Reverse of Note.

                   This Note is one of a duly authorized issue of debt
         securities of the Company designated as its "3_% Exchangeable
         Subordinated Notes due 2007" (herein called the "Notes"),
         limited in aggregate principal amount to $1,150,000,000, issued
         and to be issued under an Indenture, dated as of December 1,
         1985, as supplemented (herein called the "Indenture"), between
         the Company and The Chase Manhattan Bank, as Trustee (herein
         called the "Trustee"), which term includes any successor
         trustee under the Indenture), to which Indenture and all
         indentures supplemental thereto reference is hereby made for a
         statement of the respective rights, limitations of rights,
         duties and immunities thereunder of the Company, the Trustee,
         the holders of Senior Indebtedness  and the Holders of the
         Notes and of the terms upon which the Notes are, and are to be,
         authenticated and delivered.

                   The Notes are subject to redemption upon not less
         than 30 nor more than 60 days' notice by mail, at any time on
         or after September 25, 2002, as a whole or in part, at the
         election of the Company, at the following Redemption Prices
         (expressed as percentages of the principal amount) if redeemed
         during the 12-month period beginning September 15 of the years
         indicated:

         Year                                          Redemption Price

         2002.........................................       101.5625%
         2003.........................................       101.2500%
         2004.........................................       100.9375%
         2005.........................................       100.6250%
         2006.........................................       100.3125%










                                       -6-<PAGE>





         and on September 15, 2007 at a Redemption Price equal to 100%
         of the principal amount, together in the case of any such
         redemption with accrued interest to the Redemption Date, but
         interest installments whose Stated Maturity is on or prior to
         such Redemption Date will be payable to the Holders of such
         Notes, or one or more Predecessor Securities, of record at the
         close of business on the relevant Record Dates referred to on
         the face hereof, all as provided in the Indenture.

                   Subject to and upon compliance with the provisions of
         the Indenture, and subject to the Company's rights to suspend
         exchanges and to elect cash settlement as set forth below, the
         Holder of this Note is entitled at any time on or after October
         1, 1998 and before the close of business on September 15, 2007
         (or, in case this Note or a portion hereof is called for
         redemption, then in respect of this Note or such portion
         hereof, as the case may be, until and including, but (unless
         the Company defaults in making the payment due upon redemption)
         not after, the close of  business on the Redemption Date)) to
         exchange this Note (or any portion of the principal amount
         hereof that is an integral multiple of $1,000), into fully paid
         and nonassessable shares (calculated as to each exchange to the
         nearest 1/100 of a share) of Common Stock, $.01 par value per
         share ("Diamond Offshore Common Stock" of Diamond Offshore
         Drilling, Inc. ("Diamond Offshore") at the rate of 15.3757
         shares of Diamond Offshore Common Stock for each $1,000
         principal amount of Note (or at the current adjusted rate if an
         adjustment has been made as provided in the Indenture) by
         surrender of this Note, duly endorsed or assigned to the
         Company or in blank to the Company at the office or agency of
         the Company in the Borough of Manhattan, The City of New York
         or at any other office or agency of the Company maintained for
         such purpose, accompanied by written notice to the Company that
         the Holder hereof elects to exchange this Note (or if less than
         the entire principal amount hereof is to be exchanged,
         specifying the portion hereof to be exchanged) and, in case
         such surrender shall be made during the period from the close
         of business on any Regular Record Date next preceding any
         Interest Payment Date to the opening of business on such
         Interest Payment Date, also accompanied by payment in New York
         Clearing House (next day) funds (or other funds acceptable to
         the Company) of an amount equal to the interest payable on such
         Interest Payment Date on the principal amount of this Note then
         being exchanged, provided that, if this Note or any portion
         hereof has been called for redemption on a Redemption Date
         occurring during the period from the close of business on any
         Regular Record Date next preceding any Interest Payment Date to
         the opening of business on the succeeding Interest Payment Date
         and is surrendered for exchange during such period, then the
         Holder of this Note who exchanges this Note or any portion
         hereof during such period will be entitled to receive the
         interest accruing on the principal amount of this Note so
         called for redemption and then being exchanged from the
         Interest Payment Date next preceding the date of such exchange
         to such succeeding Interest Payment Date and shall not be
         required to pay such interest upon


                                       -7-<PAGE>





         surrender of this Note for exchange.  Subject to the provisions
         of the preceding sentence and, in the case of an exchange after
         the close of business on the Regular Record Date next preceding
         any Interest Payment Date and before the opening of business on
         such Interest Payment Date, to the right of the Holder of this
         Note (or any Predecessor Security) of record as of such Regular
         Record Date to receive the related installment of interest to
         the extent and under the circumstances provided in the
         Indenture, no payment or adjustment is to be made on exchange
         for interest accrued hereon from the Interest Payment Date next
         preceding the day of exchange, or for dividends on the Diamond
         Offshore Common Stock issued on exchange hereof.  Interest
         payable on any Interest Payment Date in respect of this Note or
         any portion hereof surrendered for exchange on or after such
         Interest Payment Date shall be paid to the Holder of such Note
         as the Regular Record Date next preceding such Interest Payment
         Date, notwithstanding the exercise of the right of exchange.
         No fractions of shares or scrip representing fractions of
         shares will be issued on exchange, but instead of any
         fractional interest, the Company shall pay a cash adjustment as
         provided in the Indenture or, at its option, the Company shall
         round up to the next higher whole share.

                   The Exchange Rate is subject to adjustment as
         provided in the Indenture.  The Indenture also provides that in
         case of certain consolidations or mergers to which Diamond
         Offshore is a party or the conveyance, transfer, sale or lease
         of all or substantially all of the properties and assets of
         Diamond Offshore, the Indenture shall be amended, without the
         consent of any Holders of Notes, so that this Note, if then Out
         standing, will be exchangeable thereafter, during the period
         this Note shall be exchangeable as specified above, only into
         the kind and amount of securities, cash and other property
         receivable upon such consolidation, merger, conveyance,
         transfer, sale or lease (including any Diamond Offshore Common
         Stock retainable) by a holder of the number of shares of
         Diamond Offshore Common Stock into which this Note could have
         been exchanged immediately prior to such consolidation, merger,
         conveyance, transfer, sale or lease (assuming such holder of
         Diamond Offshore Common Stock failed to exercise any rights of
         election and received per share the kind and amount received
         per share by a plurality of non-electing shares and further
         assuming, if such consolidation, merger, conveyance, transfer,
         sale or lease is prior to the date on which this Note may be
         exchanged as provided above, that this Note was exchangeable
         immediately prior to the time of such occurrence at the initial
         Exchange Rate specified above as adjusted from the original
         issue date of the Notes to such time as provided in the
         Indenture).  No adjustment in the Exchange Rate will be made
         until such adjustment would require an increase or decrease of
         at least one percent of such rate, provided that any adjustment
         that would otherwise be made will be carried forward and taken
         into account in the computation of any subsequent adjustment.

                   The Company may at any time suspend the right of
         exchange attaching to


                                       -8-<PAGE>





         the Notes, by giving one business day's notice of such
         suspension to the Trustee (which notice may be given by Diamond
         Offshore on behalf of the Company), provided that, (i) the
         total period during which such right of exchange is suspended
         shall not exceed 90 consecutive days at any one time or a total
         of 120 days in any 12-month period; and (ii) no such suspension
         may be in effect during the 14-day period preceding any
         Redemption Date or the final maturity date of the Notes.  In
         addition, the right of Holders to exchange will be suspended if
         the Company has irrevocably elected to pay in cash the Average
         Market Value Amount in respect of all Notes delivered for
         exchange prior to Redemption Date or final maturity date in
         respect of the Notes.

                   At any time prior to September 2, 2007, and unless
         the Company shall have previously elected in connection with a
         call for redemption or at maturity to pay in cash the Average
         Market Value Amount upon any exchange prior to the applicable
         Redemption Date or final maturity date, as set forth below, the
         Company may elect to make a cash settlement in respect of any
         Note surrendered for exchange by delivering notice thereof to
         the tendering Holder not more than five Trading Days after such
         Note is surrendered for exchange.  Such cash settlement shall
         be in an amount, per $1,000 principal amount of Notes delivered
         for  exchange, equal to the greater of (A) $1,000 and (B) the
         product of (i) the then-prevailing Exchange Rate and (ii) the
         average of the Closing Price of the Diamond Offshore Common
         Stock on the five Trading Days commencing two Trading Days
         after delivery by the Company of such notice to such Holder.
         The Company will pay such cash settlement amount as promptly as
         practicable after the completion of such five Trading Day
         period.

                   The Company may elect, in connection with a
         redemption of Notes or the final maturity of the Notes, to
         satisfy its obligations to Holders who elect to exchange their
         Notes for Diamond Offshore Common Stock by cash payment of the
         Average Market Value Amount.  If the Company makes such an
         election, Holders of Notes will no longer be entitled to
         receive Diamond Offshore Common Stock in exchange for their
         Notes.  The Company may make such an election, in respect of
         any Notes to be redeemed on a Redemption Date or repaid on the
         final maturity date, by giving an irrevocable notice thereof to
         the Holders not later than the  35th Trading Day prior to such
         Redemption Date or final maturity date, in which case the
         Company will be obligated to pay the Average Market Value
         Amount in respect of all Notes to be redeemed or repaid on such
         Redemption Date or final maturity date to Holders who elect to
         exchange their Notes for Diamond Offshore Common Stock.  If
         such notice is delivered in connection with a Redemption Date,
         it shall be required to be given not later than 35 Trading Days
         prior to the Redemption Date.

                   [IF NOT A GLOBAL SECURITY INSERT -- In the event of
         redemption or exchange of this Note in part only, a new Note or
         Notes for the unredeemed or unexchanged


                                       -9-<PAGE>





         portion hereof will be issued in the name of the Holder
         hereof.]

                   [IF A GLOBAL SECURITY INSERT -- In the event of a
         deposit or withdrawal of an interest in this Note (including
         upon an exchange, transfer, redemption or exchange of this Note
         in part only), the Security Registrar, upon receipt of notice
         of such event from the Depositary's custodian for this Note,
         shall make an adjustment on its records to reflect an increase
         or decrease of the Outstanding principal amount of this Note
         resulting from such deposit or withdrawal, as the case may be.]

                   The indebtedness evidenced by this Note is, to the
         extent and in the manner provided in the Indenture, subordinate
         and subject in right of payment to the prior payment in full of
         all Senior Indebtedness of the Company, and this Note is issued
         subject to such provisions of the Indenture with respect
         thereto.  Each Holder of this Note, by accepting the same, (a)
         agrees to and shall be bound by such provisions, (b) authorizes
         and directs the Trustee on his behalf to take such action as
         may be necessary or appropriate to effectuate the subordination
         so provided and (c) appoints the Trustee his attorney-in-fact
         for any and all such purposes.

                   If an Event of Default shall occur and be continuing,
         the principal of all the Notes may be declared due and payable
         in the manner and with the effect provided in the Indenture.

                   The Indenture permits, with certain exceptions as
         therein provided, the amendment thereof and the modification of
         the rights and obligations of the Company and the rights under
         the Indenture of the Holders of Debt Securities issued
         thereunder at any time by the Company and the Trustee with the
         consent of the Holders of a majority in principal amount of the
         Outstanding Debt Securities affected thereby.  The Indenture
         also contains provisions permitting the Holders of specified
         percentages in principal amount of the Notes at the time
         Outstanding, on behalf of the Holders of all the Notes, to
         waive compliance by the Company with certain provisions of the
         Indenture and certain past defaults under the Indenture and
         their consequences.  Any such consent or waiver by the Holder
         of this Note shall be conclusive and binding upon such Holder
         and upon all future Holders of this Note and of any Note issued
         in exchange herefor or in lieu hereof, whether or not notation
         of such consent or waiver is made upon this Note or such other
         Note.

                   No reference herein to the Indenture and no provision
         of this Note or of the Indenture shall alter or impair the
         obligation of the Company, which is absolute and unconditional,
         to pay the principal of and premium, if any, and interest on
         this Note at the times, places and rate, and in the coin or
         currency, herein prescribed or to exchange this Note as
         provided in the Indenture.


                                       -10-<PAGE>





                   As provided in the Indenture and subject to certain
         limitations therein set forth, the transfer of Notes is
         registrable on the Note Register upon surrender of a Note for
         registration of transfer at the office or agency of the Company
         in the Borough of Manhattan, The City of New York, and at such
         other offices or agencies as the Company may designate, duly
         endorsed by, or accompanied by a written instrument of transfer
         in form satisfactory to the Company and the Security Registrar
         duly executed by, the Holder thereof or his attorney duly
         authorized in writing, and thereupon one or more new Notes, of
         authorized denominations and for the same aggregate principal
         amount, will be issued to the designated transferee or
         transferees.

                   The Notes are issuable only in registered form
         without coupons in denominations of $1,000 and any integral
         multiple thereof.  As provided in the Indenture and subject to
         certain limitations therein set forth, Notes are exchangeable
         for a like aggregate principal amount of Notes of a different
         authorized denomination, as requested by the Holder
         surrendering the same. 

                   No service charge shall be made for any such
         registration of transfer or exchange, but the Company may
         require payment of a sum sufficient to recover any tax or other
         governmental charge payable in connection therewith.

                   Prior to due presentation of a Security for
         registration of transfer, the Company, the Trustee and any
         agent of the Company or the Trustee may treat the Person in
         whose name such Note is registered, as the owner thereof for
         all purposes, whether or not such Note be overdue, and neither
         the Company, the Trustee nor any such agent shall be affected
         by notice to the contrary.

                   THE INDENTURE AND THIS NOTE SHALL BE GOVERNED BY AND
         CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

                   All terms used in this Note which are defined in the
         Indenture shall have the meanings assigned to them in the
         Indenture.

                   2.4  Form of Trustee's  Certificate of
         Authentication.

                   This is one of the Notes referred to in the within-
         mentioned Indenture.

                                            THE CHASE MANHATTAN BANK,
                                                              as Trustee






                                       -11-<PAGE>








                                            By:________________________
                                                Authorized Signatory


                   2.5  Form of Exchange Notice.



                                 EXCHANGE NOTICE

                   The undersigned Holder of this Note hereby
         irrevocably exercises the option to exchange this Note, or any
         portion of the principal amount hereof (which is an integral
         multiple of $1,000) below designated, into shares of Common
         Stock of Diamond Offshore Drilling, Inc. in accordance with the
         terms of the Indenture referred to in this Note, and directs
         that such shares, together with a check in payment for any
         fractional share and any Notes representing any unexchanged
         principal amount hereof, be delivered to and be registered in
         the name of the undersigned unless a different name has been
         indicated below.  If such shares of Common Stock or Notes are
         to be registered in the name of a Person other than the
         undersigned, the undersigned will pay all transfer taxes
         payable with respect thereto.  Any amount required to be paid
         by the undersigned on account of interest accompanies this
         Note.


         Dated:  ____________________
                                               ________________________
                                                       Signature


         If shares or Notes are to be    If only a portion of the Notes 
         registered in the name of a     is to be exchanged, please 
         Person other than the Holder,   indicate:
         please print such Person's 
         name and address:               1.  Principal amount to be 
                                             exchanged:

                                             $_____________
         _____________________________
              Name                       2.  Principal amount and
                                             denomination of Notes
                                             representing unexchanged
                                             principal amount to be
                                             issued:
         _____________________________





                                       -12-<PAGE>





             Address
                                             Amount:  $________

                                             Denominations:  $_________
         _____________________________       (any integral multiple of 
         Social Security or other            $1,000)
         Taxpayer Identification 
         Number, if any


         Signature must be guaranteed by an eligible Guarantor
         Institution (banks, stockbrokers, savings and loan associations
         and credit unions) with membership in an approved signature
         medallion program pursuant to Securities and Exchange
         Commission Rule 17Ad-15 if cash or Common Stock is to be
         delivered other than to, and in the name of, the registered
         Holder.

                                                   [Signature Guarantee]


                   3.  Title and Terms.

                   There shall be a series of Debt Securities designated
         as the "3_% Exchangeable Subordinated Notes due 2007" of the
         Company.  Their Stated Maturity shall be September 15, 2007 and
         they shall bear interest at the rate of 3_% per annum, from
         September 16, 1997 or from the most recent Interest Payment
         Date to which interest has been paid or duly provided for, as
         the case may be, payable semi-annually on March 15 and
         September 15, commencing March 15, 1998 until the principal
         thereof is paid or made available for payment.  The interest so
         payable, and punctually paid or duly provided for, on any
         Interest Payment Date will be paid to the Person in whose name
         the Notes (or one or more Precedessor Securities) is registered
         at the close of business on the Regular Record Date for such
         interest, which shall be the March 1 or September 1 (whether or
         not a Business Day), as the case may be, next preceding such
         Interest Payment Date.

                   The aggregate principal amount of Notes which may be
         authenticated and delivered under this Third Supplemental
         Indenture is limited to $1,150,000,000, except for Notes
         authenticated and delivered upon registration or transfer of,
         or in exchange for, or in lieu of, other Notes pursuant to
         Section 304, 305, 306, 906 or 1107 of the Indenture.

                   The Notes shall be redeemable at the option of the
         Company and exchangeable into shares of Diamond Offshore Common
         Stock at the option of the Holder, subject to the Company's
         right to suspend exchanges and to elect cash settlement
         (including by payment of the Average Market Value Amount in
         connection with a



                                       -13-<PAGE>





         redemption of Notes or final maturity of the Notes), in each
         case in accordance with the terms set forth in the form of Note
         and in this Third Supplemental Indenture.

                   The Securities of this series shall not be subject to
         a sinking fund.

                   The Notes of this series are not subject to
         defeasance at the option of the Company pursuant to Article
         Fifteen of the Indenture.

                   4.  Exchange of Notes.

                   4.1  Exchange Privilege and Exchange Rate; Suspension
         of Exchanges; Cash Settlement.

                   Subject to and upon compliance with the provisions of
         this Section, at the option of the Holder thereof, any Note or
         any portion which is $1,000 or an integral multiple thereof may
         be exchanged into fully paid and nonassessable shares
         (calculated as to each exchange to the nearest 1/100th of a
         share) of Diamond Offshore Common Stock at the Exchange Rate,
         determined as hereinafter provided, in effect at the time of
         exchange.  Such exchange right shall commence on October 1,
         1998 and shall expire at the close of business on September 15,
         2007.  In case a Note or portion thereof is called for
         redemption at the election of the Company, such exchange right
         in respect of the Note, or portion thereof, so called shall
         expire at the close of business on the Redemption Date unless
         the Company defaults in making the payment due upon redemption.

                   The rate at which shares of Common Stock shall be
         delivered upon exchange (herein called the "Exchange Rate")
         shall be initially 15.3757 shares of Diamond Offshore Common
         Stock for each $1,000 principal amount of Notes.  The Exchange
         Rate shall be adjusted in certain instances as provided in this
         Section 4.

                   The Company may at any time suspend the right of
         exchange attaching to the Notes, by giving one business day's
         notice of such suspension to the Trustee (which notice may be
         given by Diamond Offshore on behalf of the Company), provided
         that, (i) the total period during which such right of exchange
         is suspended shall not exceed 90 consecutive days at any one
         time or a total of 120 days in any 12-month period; and (ii) no
         such suspension may be in effect during the 14-day period
         preceding any Redemption Date or the final maturity date of the
         Notes.  In addition, the right of Holders to exchange will be
         suspended if  the Company has irrevocably elected to pay in
         cash the Average Market Value Amount in respect of all Notes
         delivered for exchange prior to Redemption Date or final
         maturity date in respect of the Notes, as provided in the
         Notes.

                   At any time prior to September 2, 2007, and unless
         the Company shall


                                       -14-<PAGE>





         have previously elected in connection with a call for
         redemption or at maturity to pay in cash the Average Market
         Value Amount upon any exchange prior to the applicable
         Redemption Date or final maturity date, as set forth below, the
         Company may elect to make a cash settlement in respect of any
         Note surrendered for exchange by delivering notice thereof to
         the tendering Holder not more than five Trading Days after such
         Note is surrendered for exchange.  Such cash settlement shall
         be in an amount, per $1,000 principal amount of Notes delivered
         for  exchange, equal to the greater of (A) $1,000 and (B) the
         product of (i) the then-prevailing Exchange Rate and (ii) the
         average of the Closing Price of the Diamond Offshore Common
         Stock on the five Trading Days commencing two Trading Days
         after delivery by the Company of such notice to such Holder.
         The Company will pay such cash settlement amount as promptly as
         practicable after the completion of such five Trading Day
         period.

                   4.2.  Exercise of Exchange Privilege.

                   In order to exercise the exchange privilege, the
         Holder of any Note to be exchanged shall surrender such Note,
         duly endorsed or assigned to the Company or in blank, at any
         office or agency of the Company maintained for that purpose
         pursuant to Section 4.7 of this Supplemental Indenture,
         accompanied by a duly signed exchange notice substantially in
         the form provided in Section 2.5 of this Supplemental
         Indenture, stating that the Holder elects to exchange such Note
         or, if less than the entire principal amount thereof is to be
         exchanged, the portion thereof to be exchanged.  Each Note
         surrendered for exchange (in whole or in part) during the
         period from the close of business on any Regular Record Date
         next preceding any Interest Payment Date to the opening of
         business on such Interest Payment Date shall (except in the
         case of any Note or portion thereof which has been called for
         redemption on a Redemption Date occurring within such period)
         be accompanied by payment in New York Clearing House (next day)
         funds (or other funds acceptable to the Company) of an amount
         equal to the interest payable on such Interest Payment Date on
         the principal amount of such Note (or portion thereof, as the
         case may be) being surrendered for exchange.  The interest so
         payable on any Interest Payment Date with respect to any Note
         (or portion thereof, if applicable) which has been called for
         redemption on a Redemption Date occurring during the period
         from the close of business on the Regular Record Date next
         preceding such Interest Payment Date to the opening of business
         on such Interest Payment Date, which Note (or portion thereof,
         if applicable) so called for redemption is surrendered for
         exchange (in whole or in part) during such period, shall be
         paid upon such exchange to the Holder of such Note as of the
         exchange date in an amount equal to the interest that would
         have been payable on the principal amount of such Note so
         called for redemption and being exchanged if such principal
         amount had been exchanged as of the close of business on such
         Interest Payment Date.  The interest so payable on any Interest
         Payment Date in respect of any Note (or portion thereof, as the
         case may be) which has not been called for


                                       -15-<PAGE>





         redemption on a Redemption Date occurring during the period
         from the close of business on the Regular Record Date next
         preceding such Interest Payment Date to the opening of business
         on such Interest Payment Date, which Note (or portion thereof,
         as the case may be) not so called for redemption is surrendered
         for exchange (in whole or in part) during such period, shall be
         paid to the Holder of such Note as of such Regular Record Date.
         Interest payable on any Interest Payment Date in respect of any
         Note surrendered for exchange on or after such Interest Payment
         Date shall be paid to the Holder of such Note as of the Regular
         Record Date next preceding such Interest Payment Date,
         notwithstanding the exercise of the right of exchange.  Except
         as provided in this paragraph, no cash payment or adjustment
         shall be made upon any exchange on account of any interest
         accrued from the Interest Payment Date next preceding the
         exchange date in respect of any Note (or part thereof, as the
         case may be) surrendered for exchange, or on account of any
         dividends on the Diamond Offshore Common Stock issued upon
         exchange.

                   Notes shall be deemed to have been exchanged
         immediately prior to the close of business on the day of
         surrender of such Notes for exchange in accordance with the
         foregoing provisions, and at such time the rights of the
         Holders of such Notes as Holders shall cease, and the Person or
         Persons entitled to receive the Diamond Offshore Common Stock
         issuable upon exchange shall be treated for all purposes as the
         record holder or holders of such Diamond Offshore Common Stock
         at such time.  Within five Trading Days of the exchange date,
         the Company shall issue and deliver to the Trustee, for
         delivery to the Holder, a certificate or certificates for the
         number of full shares of Diamond Offshore Common Stock issuable
         upon exchange, together with payment in lieu of any fraction of
         a share, as provided in Section 4.3 of this Supplemental
         Indenture.

                   In the case of any Note which is exchanged in part
         only, upon such exchange the Company shall execute and the
         Trustee shall authenticate and deliver to the Holder thereof,
         at the expense of the Company, a new Note or Notes of
         authorized denominations in an aggregate principal amount equal
         to the unexchanged portion of the principal amount of such
         Note.

                   4.3.  Fractions of Shares.

                   No fractional shares of Diamond Offshore Common Stock
         shall be delivered upon exchange of any Note or Notes.  If more
         than one Note shall be surrendered for exchange at one time by
         the same Holder, the number of full shares which shall be
         issuable upon exchange thereof shall be computed on the basis
         of the aggregate principal amount of the Notes (or specified
         portions thereof) so surrendered.  Instead of any fractional
         share of Diamond Offshore Common Stock which would otherwise be
         issuable upon exchange of any Note or Notes (or specified
         portions thereof),


                                       -16-<PAGE>





         the Company shall calculate and pay a cash adjustment in
         respect of such fraction (calculated to the nearest 1/100th of
         a share) in an amount equal to the same fraction of the Closing
         Price at the close of business on the day of exchange (or, if
         such day is not a Trading Day, on the Trading Day immediately
         preceding such day), or alternatively, the Company shall round
         up to the next higher whole share.

                   4.4.  Adjustment of Exchange Rate.

                   The Exchange Rate shall be subject to adjustments
         from time to time as follows:

                   (1)  In case Diamond Offshore shall pay or make a
         dividend or other distribution on any class of capital stock of
         Diamond Offshore payable in shares of Diamond Offshore Common
         Stock, the Exchange Rate in effect at the opening of business
         on the day following the Determination Date for such dividend
         or other distribution shall be increased by dividing such
         Exchange Rate by a fraction of which the numerator shall be the
         number of shares of Diamond Offshore Common Stock outstanding
         at the close of business on such Determination Date and the
         denominator shall be the sum of such number of shares and the
         total number of shares constituting such dividend or other
         distribution, such increase to become effective immediately
         after the opening of business on the day following such
         Determination Date.  For the purposes of this paragraph (1),
         the number of shares of Diamond Offshore Common Stock at any
         time outstanding shall not include shares held in the treasury
         of Diamond Offshore but shall include shares issuable in
         respect of scrip certificates issued in lieu of fractions of
         shares of Diamond Offshore Common Stock.  

                   (2)  Subject to the last sentence of paragraph (7) of
         this Section, in case  Diamond Offshore shall issue rights,
         options or warrants to all holders of its Common Stock
         entitling them to subscribe for or purchase shares of Diamond
         Offshore Common Stock at a price per share less than the
         current market price per share (determined as provided in
         paragraph (8) of this Section 4.4) of the Diamond Offshore
         Common Stock on the Determination Date for such distribution,
         the Exchange Rate in effect at the opening of business on the
         day following such Determination Date shall be increased by
         dividing such Exchange Rate by a fraction of which the
         numerator shall be the number of shares of Diamond Offshore
         Common Stock outstanding at the close of business on such
         Determination Date plus the number of shares of Diamond
         Offshore Common Stock which the aggregate of the offering price
         of the total number of shares of Diamond Offshore Common Stock
         so offered for subscription or purchase would purchase at such
         current market price and the denominator shall be the number of
         shares of Diamond Offshore Common Stock outstanding at the
         close of business on such Determination Date plus the number of
         shares of Diamond Offshore Common Stock so offered for


                                       -17-<PAGE>





         subscription or purchase, such increase to become effective
         immediately after the opening of business on the day following
         such Determination Date.  For the purposes of this paragraph
         (2), the number of shares of Diamond Offshore Common Stock at
         any time outstanding shall not include shares held in the
         treasury of Diamond Offshore but shall include shares issuable
         in respect of scrip certificates issued in lieu of fractions of
         shares of Diamond Offshore Common Stock. 

                   (3)  In case outstanding shares of Diamond Offshore
         Common Stock shall be subdivided into a greater number of
         shares of Diamond Offshore Common Stock, the Exchange Rate in
         effect at the opening of business on the day following the day
         upon which such subdivision becomes effective shall be
         proportionately increased, and, conversely, in case outstanding
         shares of Diamond Offshore Common Stock shall each be combined
         into a smaller number of shares of Diamond Offshore Common
         Stock, the Exchange Rate in effect at the opening of business
         on the day following the day upon which such combination
         becomes effective shall be proportionately reduced, such
         increase or reduction, as the case may be, to become effective
         immediately after the opening of business on the day following
         the day upon which such subdivision or combination becomes
         effective.

                   (4)  Subject to the last sentence of paragraph (7) of
         this Section, in case Diamond Offshore shall, by dividend or
         otherwise, distribute to all holders of  Diamond Offshore
         Common Stock evidences of its indebtedness, shares of any class
         of capital stock, or other property (including securities, but
         excluding (i) any rights, options or warrants referred to in
         paragraph (2) of this Section, (ii) any dividend or
         distribution paid exclusively in cash, (iii) any dividend or
         distribution referred to in paragraph (1) of this Section and
         (iv) any merger or consolidation to which Section 4.11 of this
         Supplemental Indenture applies), the Exchange Rate shall be
         adjusted so that the same shall equal the rate determined by
         dividing the Exchange Rate in effect immediately prior to the
         close of business on the Determination Date for such
         distribution by a fraction of which the numerator shall be the
         current market price per share (determined as provided in
         paragraph (8) of this Section 4.4) of the Diamond Offshore
         Common Stock on such Determination Date less the then fair
         market value (as determined by the Board of Directors, whose
         determination shall be conclusive and described in a Board
         Resolution filed with the Trustee) of the portion of the
         assets, shares or evidences of indebtedness so distributed
         applicable to one share of Diamond Offshore Common Stock and
         the denominator shall be such current market price per share of
         the Diamond Offshore Common Stock, such adjustment to become
         effective immediately prior to the opening of business on the
         day following such Determination Date.  If the Board of
         Directors determines the fair market value of any distribution
         for purposes of this paragraph (4) by reference to the actual
         or when issued trading market for any Notes comprising such
         distribution, it must in doing so consider the prices in such
         market over the same period


                                       -18-<PAGE>





         used in computing the current market price per share pursuant
         to paragraph (8) of this Section.

                   (5)  In case Diamond Offshore shall, by dividend or
         otherwise, make a Cash Distribution in an aggregate amount
         that, combined together with (i) the aggregate amount of any
         other Cash Distributions made within the 12 months preceding
         the date of payment of such distribution in respect of which no
         adjustment pursuant to this paragraph (5) has been made and
         (ii) any Excess Purchase Payment made within the 12 months
         preceding the date of such distribution and in respect of which
         no adjustment has been made pursuant to paragraph (6) of this
         Section 4.4, exceeds 12.5% of Diamond Offshore's Common Stock
         Market Capitalization on the Determination Date for such Cash
         Distribution, then, and in each such case, immediately after
         the close of business on the Determination Date for such Cash
         Distribution, the Exchange Rate shall be adjusted so that the
         same shall equal the rate determined by dividing the Exchange
         Rate in effect immediately prior to the close of business on
         such Determination Date by a fraction (a) the numerator of
         which shall be equal to the current market price per share
         (determined as provided in paragraph (8) of this Section) of
         the Diamond Offshore Common Stock on such Determination Date
         less an amount equal to the quotient of (1) the amount of such
         excess divided by (2) the number of shares of Diamond Offshore
         Common Stock outstanding on such Determination Date and (b) the
         denominator of which shall be equal to the current market price
         per share (determined  as provided in paragraph (8) of this
         Section 4.4) of the Diamond Offshore Common Stock on such
         Determination Date.

                   (6)  In case Diamond Offshore or any subsidiary of
         Diamond Offshore shall make an Excess Purchase Payment in an
         aggregate amount that, combined together with (i) the aggregate
         amount of any other Excess Purchase Payments made by Diamond
         Offshore or any subsidiary of Diamond Offshore within the 12
         months preceding such Excess Purchase Payment in respect of
         which no adjustment pursuant to this paragraph (6) has been
         made and (ii) the aggregate amount of any Cash Distributions
         made within the 12 months preceding such Excess Purchase
         Payment in respect of which no adjustment pursuant to paragraph
         (5) of this Section 4.4 has been made, exceeds 12.5% of Diamond
         Offshore's Market Capitalization as of the Determination Date,
         then, and in each such case, immediately prior to the opening
         of business on the day after the tender offer in respect of
         which such Excess Purchase Payment is to be made expires, the
         Exchange Rate shall be adjusted so that the same shall equal
         the rate determined by dividing the Exchange Rate in effect
         immediately prior to the close of business on the Determination
         Date for such tender offer by a fraction (a) the numerator of
         which shall be equal to the product of (A) the number of shares
         of Diamond Offshore Common Stock outstanding (including any
         tendered shares) at such Determination Date less (B) the amount
         of such excess and (b) the denominator of which shall be equal
         to the product of (X) the current market price per share of the
         Diamond Offshore Common Stock


                                       -19-<PAGE>





         (determined as provided in paragraph (8) of this Section 4.4)
         as of such Determination Date multiplied by (Y) the number of
         shares of Diamond Offshore Common Stock outstanding (including
         any tendered shares) as of the Determination Date less the
         number of all shares validly tendered and not withdrawn as of
         the Determination Date.

                   (7)  The reclassification of Diamond Offshore Common
         Stock into securities other than Diamond Offshore Common Stock
         (other than any reclassification upon a consolidation or merger
         to which Section 4.11 of the Supplemental Indenture applies)
         shall be deemed to involve (a) a distribution of such
         securities other than Diamond Offshore Common Stock to all
         holders of Diamond Offshore Common Stock (and the effective
         date of such reclassification shall be deemed to be the
         Determination Date), and (b) a subdivision or combination, as
         the case may be, of the number of shares of Diamond Offshore
         Common Stock outstanding immediately prior to such
         reclassification into the number of shares of Diamond Offshore
         Common Stock outstanding immediately thereafter (and the
         effective date of such reclassification shall be deemed to be
         "the day upon which such subdivision becomes effective" or "the
         day upon which such combination becomes effective", as the case
         may be, and "the day upon which such subdivision or combination
         becomes effective" within the meaning of paragraph (3) of this
         Section 4.4).  Rights or warrants issued by Diamond Offshore to
         all holders of  Diamond Offshore Common Stock entitling the
         holders thereof to subscribe for or purchase shares of Diamond
         Offshore Common Stock, which rights or warrants (i) are deemed
         to be transferred with such shares of Diamond Offshore Common
         Stock, (ii) are not exercisable and (iii) are also issued in
         respect of future issuances of Diamond Offshore Common Stock,
         in each case in clauses (i) through (iii) until the occurrence
         of a specified event or events ("Trigger Event"), shall for
         purposes of this Section 4.4 not be deemed issued until the
         occurrence of the earliest Trigger Event.

                   (8)  For the purpose of any computation under
         paragraphs (2), (4), (5) or (6) of this Section 4.4, the
         current market price per share of Diamond Offshore Common Stock
         on any date shall be calculated by the Company and be deemed to
         be the average of the daily Closing Prices for the five
         consecutive Trading Days selected by the Company commencing not
         more than 10 Trading Days before, and ending not later than,
         the earlier of the day in question and the day before the "ex"
         date with respect to the issuance or distribution requiring
         such computation.  For purposes of this paragraph, the term "ex
         date", when used with respect to any issuance or distribution,
         means the first date on which the Diamond Offshore Common Stock
         trades regular way in the applicable securities market or on
         the applicable securities exchange without the right to receive
         such issuance or distribution.

                   (9)  No adjustment in the Exchange Rate shall be
         required unless such adjustment (plus any adjustments not
         previously made by reason of this paragraph (9))


                                       -20-<PAGE>





         would require an increase or decrease of at least one percent
         in such rate; provided, however, that any adjustments which by
         reason of this paragraph (9) are not required to be made shall
         be carried forward and taken into account in any subsequent
         adjustment.  All calculations under this Section shall be made
         to the nearest cent or to the nearest one-hundredth of a share,
         as the case may be.

                   (10)  The Company may make such increases in the
         Exchange Rate, for the remaining term of the Notes or any
         shorter term, in addition to those required by paragraphs (1),
         (2), (3), (4), (5) and (6) of this Section 4.4, as it considers
         to be advisable in order to avoid or diminish any income tax to
         any holders of shares of Diamond Offshore Common Stock
         resulting from any dividend or distribution of stock or
         issuance of rights or warrants to purchase or subscribe for
         stock or from any event treated as such for income tax
         purposes.

                   (11)  The Company from time to time at its option may
         increase the Exchange Rate by any amount for any period of at
         least 20 calendar days.  To exercise this option the Company
         shall provide a notice to the Trustee and the Holders at least
         15 calendar days prior to the first day of the period during
         which the Exchange Rate will be adjusted stating that the
         Exchange Rate will be adjusted pursuant to this provision, the
         period during which the adjusted Exchange Rate will be in
         effect and the adjusted Exchange Rate.

                   4.5  Notice of Adjustments of Exchange Rate.

                   Whenever the Exchange Rate is adjusted as provided in
         Section 4.4 of this Supplemental Indenture:

                   (1)  the Company shall compute the adjusted Exchange
              Rate in accordance with Section 4.4 and shall prepare a
              certificate signed by either the chief financial officer,
              the treasurer or the controller of the Company setting
              forth the adjusted Exchange Rate and showing in reasonable
              detail the facts upon which such adjustment is based, and
              such certificate shall promptly be filed with the Trustee
              and at each office or agency maintained for the purpose of
              exchange of Notes pursuant to Section 4.7 of this
              Supplemental Indenture; and

                   (2)  a notice stating that the Exchange Rate has been
              adjusted and setting forth the adjusted Exchange Rate
              shall forthwith be prepared, and as soon as practicable
              after it is prepared, such notice shall be provided by the
              Company to the Trustee and to all Holders.  Unless and
              until the Trustee receives such notice, it need not
              inquire into whether any adjustment of the Exchange Rate
              is required and may assume that no such adjustment has
              been, or is required to be, made.


                                       -21-<PAGE>





                   4.6.  Notice of Certain Corporate Action.

                   In case:

                   (a)  Diamond Offshore shall declare a dividend (or
              any other distribution) on Diamond Offshore Common Stock
              payable (i) otherwise than exclusively in cash or (ii)
              exclusively in cash in an amount that would require any
              adjustment pursuant to Section 4.4 of this Supplemental
              Indenture; or

                   (b)  Diamond Offshore shall authorize the granting to
              the holders of Diamond Offshore Common Stock of rights,
              options or warrants to subscribe for or purchase any
              shares of capital stock of any class or of any other
              rights; or

                   (c)  of any reclassification of Diamond Offshore
              Common Stock, or of any consolidation, merger or share
              exchange to which Diamond Offshore is a party and for
              which approval of any shareholders of Diamond Offshore is
              required, or of the conveyance, sale, transfer or lease of
              all or substantially all of the assets of Diamond
              Offshore; or

                   (d)  of the voluntary or involuntary dissolution,
              liquidation or winding up of Diamond Offshore; or

                   (e)  Diamond Offshore or any subsidiary of Diamond
              Offshore shall commence a tender offer for all or a
              portion of the outstanding shares of Diamond Offshore
              Common Stock (or shall amend any such tender offer);

                   then the Company shall cause to be filed with the
         Trustee and at each office or agency maintained for the purpose
         of conversion of Notes pursuant to Section 4.7 of this
         Supplemental Indenture, and shall cause to be provided to all
         Holders, by the later of (i) as soon as reasonably practicable
         after the Company has become aware of such matter or (ii)  at
         least 20 days (or 10 days in any case specified in clause (a)
         or (b) above) prior to the applicable record, expiration or
         effective date hereinafter specified, a notice stating (x) the
         date on which a record is to be taken for the purpose of such
         dividend, distribution, rights, options or warrants, or, if a
         record is not to be taken, the date as of which the holders of
         Diamond Offshore Common Stock of record to be entitled to such
         dividend, distribution, rights, options or warrants are to be
         determined, (y) the date on which the right to make tenders
         under such tender offer expires or (z) the date on which such
         reclassification, consolidation, merger, conveyance, transfer,
         sale, lease, dissolution, liquidation or winding up is expected
         to become effective, and the date as of which it is




                                       -22-<PAGE>





         expected that holders of Diamond Offshore Common Stock of
         record shall be entitled to exchange their shares of Diamond
         Offshore Common Stock for securities, cash or other property
         deliverable upon such reclassification, consolidation, merger,
         conveyance, transfer, sale, lease, dissolution, liquidation or
         winding up.  Neither the failure to give such notice or the
         notice referred to in the following paragraph nor any defect
         therein shall affect the legality or validity of the
         proceedings described in clauses (a) through (e) of this
         Section 4.6.

                   The preceding paragraph to the contrary
         notwithstanding, the Company shall cause to be filed at each
         office or agency maintained for the purpose of exchange of
         Notes pursuant to Section 4.7 of this Supplemental Indenture,
         and shall cause to be provided to all Holders, notice of any
         tender offer by Diamond Offshore or any subsidiary of Diamond
         Offshore for all or any portion of the Diamond Offshore Common
         Stock at or about the time that such notice of tender offer is
         provided to the public generally.

                   4.7.  Maintenance of Office or Agency.

                   The Company will maintain in the Borough of
         Manhattan, The City of New York an office or agency where Notes
         may be surrendered for exchange and where notices and demands
         to or upon the Company in respect of the Notes and the
         Indenture may be served.  The Company will give prompt written
         notice to the Trustee of the location, and any change in the
         location, of such office or agency.  If at any time the Company
         shall fail to maintain any such required office or agency or
         shall fail to furnish the Trustee with the address thereof,
         such surrenders may be made or served at the Corporate Trust
         Office of the Trustee, and the Company hereby appoints the
         Trustee as its agent to receive all such surrenders.

                   The Company may also from time to time designate one
         or more other offices or agencies (in or outside the Borough of
         Manhattan, The City of New York) where the Notes may be
         presented or surrendered for such purpose and may from time to
         time rescind such designations; provided, however, that no such
         designation or rescission shall in any manner relieve the
         Company of its obligation to maintain an office or agency in
         the Borough of Manhattan, The City of New York for such
         purpose.  The Company will give prompt written notice to the
         Trustee of any such designation or rescission and of any change
         in the location of any such other office or agency.

                   4.8  Taxes on Exchanges.

                   Except as provided in the next sentence, the Company
         will pay any and all taxes and duties that may be payable in
         respect of the delivery of shares of Diamond



                                       -23-<PAGE>





         Offshore Common Stock pursuant hereto.  The Company shall not,
         however, be required to pay any tax or duty which may be
         payable in respect of any transfer involved in the delivery of
         shares of Diamond Offshore Common Stock in a name other than
         that of the Holder of the Note or Notes to be exchanged, and no
         such issue or delivery shall be made unless and until the
         Person requesting such issue has paid to the Company the amount
         of any such tax or duty, or has established to the satisfaction
         of  the Company that such tax or duty has been paid.

                   4.9.  Covenant as to Diamond Offshore Common Stock.

                   The Company agrees that all shares of Diamond
         Offshore Common Stock which may be delivered upon exchange of
         Notes, upon such delivery, will have been duly authorized and
         validly issued and will be fully paid and nonassessable and,
         except as provided in Section 4.8 of this Supplemental
         Indenture, the Company will pay all taxes, liens and charges
         with respect to the issue thereof.

                   4.10.  Cancellation of Exchanged Notes.

                   All Notes delivered for exchange shall be delivered
         to the Trustee to be canceled by or at the direction of the
         Trustee, which shall dispose of the same as provided in Section
         309 of the Indenture.

                   4.11.  Provision in Case of Consolidation, Merger or
         Sale of Assets of Diamond Offshore.

                   In case of any consolidation of Diamond Offshore with
         any other Person, any merger of Diamond Offshore into another
         Person or of another Person into Diamond Offshore (other than a
         merger which does not result in any reclassification, exchange,
         exchange or cancellation of outstanding shares of Diamond
         Offshore Common Stock) or any conveyance, sale, transfer or
         lease of all or substantially all of the properties and assets
         of Diamond Offshore, the Company shall execute and deliver to
         the Trustee a supplemental indenture providing that the Holder
         of each Note then Outstanding shall have the right thereafter,
         during the period such Note shall be exchangeable, to exchange
         such Note only into the kind and amount of Notes, cash and
         other property receivable upon such consolidation, merger,
         conveyance, sale, transfer or lease (including any Diamond
         Offshore Common Stock retainable) by a holder of the number of
         shares of Diamond Offshore Common Stock of the Company into
         which such Note might have been exchanged immediately prior to
         such consolidation, merger, conveyance, sale, transfer or
         lease, (a) assuming such holder of Diamond Offshore Common
         Stock (i) is not a Person with which Diamond Offshore
         consolidated, into which Diamond Offshore merged or which
         merged into Diamond Offshore or to which such conveyance, sale,




                                       -24-<PAGE>





         transfer or lease was made, as the case may be (a "Constituent
         Person"), or an Affiliate of a Constituent Person and (ii)
         failed to exercise his rights of election, if any, as to the
         kind or amount of securities, cash and other property
         receivable upon such consolidation, merger, conveyance, sale,
         transfer or lease (provided that if the kind or amount of
         securities, cash and other property receivable upon such
         consolidation, merger, conveyance, sale, transfer, or lease is
         not the same for each share of Diamond Offshore Common Stock
         held immediately prior to such consolidation, merger,
         conveyance, sale, transfer or lease by others than a
         Constituent Person or an Affiliate thereof and in respect of
         which such rights of election shall not have been exercised
         ("Non-electing Share"), then for the purpose of this Section
         4.11 the kind and amount of securities, cash and other property
         receivable upon such consolidation, merger, conveyance, sale,
         transfer or lease by the holders of each Non-electing Share
         shall be deemed to be the kind and amount so receivable per
         share by a plurality of the Non-electing Shares), and (b)
         further assuming that, if such consolidation, merger,
         conveyance, transfer, sale or lease occurs before the first
         date on which Notes may be exchanged as provided herein, such
         Note was exchangeable immediately prior to the time of such
         occurrence at the initial Exchange Rate as adjusted from the
         original issue date of the Notes to such time as provided
         herein.  Such supplemental indenture shall provide for
         adjustments which, for events subsequent to the effective date
         of such supplemental indenture, shall be as nearly equivalent
         as may be practicable to the adjustments provided for in this
         Section 4.  The above provisions of this Section 4.11 shall
         similarly apply to successive consolidations, mergers,
         conveyances, sales, transfers or leases.  Notice of the
         execution of such a supplemental indenture shall be given by
         the Company to the Holder of each Note promptly upon such
         execution.  In this paragraph, "securities of the kind
         receivable" upon such consolidation, merger, conveyance,
         transfer, sale or lease by a holder of Diamond Offshore Common
         Stock means securities that, among other things, are registered
         and transferable under the Securities Act, and listed and
         approved for quotation in all securities markets, in each case
         to the same extent as such securities so receivable by a holder
         of Diamond Offshore Common Stock.

                   The Trustee nor any Paying Agent shall be under no
         responsibility to determine the correctness of any provisions
         contained in any such supplemental indenture relating either to
         the kind or amount of shares of stock or other securities or
         property or cash receivable by Holders upon the exchange of
         their Notes after any such consolidation, merger, conveyance,
         transfer, sale or lease or to any such adjustment, but may
         accept as conclusive evidence of the correctness of any such
         provisions, and shall be protected in relying upon, an Opinion
         of Counsel with respect thereto, which the Company shall cause
         to be furnished to the Trustee upon request.

                   4.12.  Responsibility of Trustee for Exchange
         Provisions.


                                       -25-<PAGE>





                   The Trustee, subject to the provisions of Section 601
         of the Indenture, shall not at any time be under any duty or
         responsibility to any Holder to determine whether any facts
         exist which may require any adjustment of the Exchange Rate, or
         with respect to the nature or extent of any such adjustment
         when made, or with respect to the method employed, or herein or
         in any supplemental indenture provided to be employed, in
         making the same, or whether a supplemental indenture need be
         entered into.  The Trustee, subject to the provisions of
         Section 601 of the Indenture, shall not be accountable with
         respect to the validity or value (or the kind or amount) of any
         Diamond Offshore Common Stock, or of any other securities or
         property or cash, which may at any time be issued or delivered
         upon the exchange of any Note; and it or they do not make any
         representation with respect thereto.  The Trustee, subject to
         the provisions of Section 601 of the Indenture, shall not be
         responsible for any failure of the Company to make or calculate
         any cash payment or to issue, transfer or deliver any shares of
         Diamond Offshore Common Stock or share certificates or other
         securities or property or cash upon the surrender of any Note
         for the purpose of conversion; and the Trustee, subject to the
         provisions of Section 601 of the Indenture, shall not be
         responsible for any failure of the Company to comply with any
         of the covenants of the Company contained in this Section.

                   4.13.  Registration.

                   The Company will use its best efforts to effect or
         cause to be effected all registrations with, and obtain all
         approvals by, all governmental authorities that may be
         necessary under any United States Federal or state law
         (including the Securities Act, the Exchange Act and state
         securities and Blue Sky laws) for the shares of Diamond
         Offshore Common Stock issuable upon conversion of Notes to be
         lawfully issued and delivered as provided herein, and
         thereafter publicly traded (if permissible under the Securities
         Act).

                   5.  Miscellaneous.

                   (a)  The Trustee accepts the trusts created by the
         Indenture, as supplemented by this Third Supplemental
         Indenture, and agrees to perform the same upon the terms and
         conditions of the Indenture, as supplemented by this Third
         Supplemental Indenture.

                   (b)  The recitals contained herein shall be taken as
         statements of the Company, and the Trustee assumes no
         responsibility for their correctness.  The Trustee makes no
         representations as to the validity or sufficiency of this Third
         Supplemental Indenture.

                   (c)  All covenants and agreements in this Third
         Supplemental Indenture by the Company or the Trustee shall bind
         its respective successors and assigns, whether so


                                       -26-<PAGE>





         expressed or not.

                   (d)  In case any provisions in this Third
         Supplemental Indenture shall be invalid, illegal or
         unenforceable, the validity, legality and enforceability of the
         remaining provisions shall not in any way be affected or
         impaired thereby.

                   (e)  Nothing in this Third Supplemental Indenture,
         express or implied, shall give to any Person, other than the
         parties hereto and their successors under the Indenture and the
         Holders of the Notes, any benefit or any legal or equitable
         right, remedy or claim under the Indenture.

                   (f)  If any provision hereof limits, qualifies or
         conflicts with a provision of the Trust Indenture Act of 1939,
         as may be amended from time to time, that is required under
         such Act to be a part of and govern this Third Supplemental
         Indenture, the latter provision shall control.  If any
         provision hereof modifies or excludes any provision of such Act
         that may be so modified or excluded, the latter provision shall
         be deemed to apply to this Third Supplemental Indenture as so
         modified or excluded, as the case may be.

                   (g)  This Third Supplemental Indenture shall be
         governed by and construed in accordance with the laws of the
         State of New York.

                   (h)  All provisions of this Third Supplemental
         Indenture shall be deemed to be incorporated in, and made a
         part of, the Indenture; and the Indenture, as supplemented by
         this Third Supplemental Indenture, shall be read, taken and
         construed as one and the same instrument.

                           ___________________________

                   This instrument may be executed in any number of
         counterparts, each of which so executed shall be deemed to be
         an original, but all such counterparts shall together
         constitute but one and the same instrument.

                   IN WITNESS WHEREOF, the Company and the Trustee have
         caused this Supplemental Indenture to be duly executed by their
         respective officers thereunto duly authorized and the seal of
         the Company and the Trustee duly attested to be hereunto
         affixed all as of the day and year first above written.


                                       LOEWS CORPORATION







                                       -27-<PAGE>







         [SEAL]                        By:_____________________________
                                          Its:  Vice President


                                       THE CHASE MANHATTAN BANK



                                       By:_____________________________
                                          Its:  [Second Vice President]


         STATE OF NEW YORK   )
                             )  ss.:
         COUNTY OF NEW YORK  )

                   On the ___th day of September, 1997, before me
         personally came ____________________ to me known, who, being by
         me duly sworn, did depose and say that he resides at New York,
         New York; that he is a [Second] Vice President of THE CHASE
         MANHATTAN BANK, one of the banking corporations described
         herein and that executed the above instrument; that he knows
         the seal of said corporation; that the seal affixed to said
         instrument is such corporate seal; that it was so affixed by
         the Board of Directors of said corporation and that he signed
         his name thereto by order of the Board of Directors of said
         corporation.

                   IN WITNESS WHEREOF, I have hereunto set my hand and
         affixed my official seal the day and year of this certificate
         first above written.

         [NOTARIAL SEAL]                   _________________________
                                                 Notary Public




















                                       -28-<PAGE>





         STATE OF NEW YORK   )
                             )  ss.:
         COUNTY OF NEW YORK  )

                   On the ___th day of September, 1997, before me
         personally came ____________________ to me known, who, being by
         me duly sworn, did depose and say that he resides at New York,
         New York; that he is a Vice President of LOEWS CORPORATION, the
         corporations described herein and that executed the above
         instrument; that he knows the seal of said corporation; that
         the seal affixed to said instrument is such corporate seal;
         that it was so affixed by the Board of Directors of said
         corporation and that he signed his name thereto by order of the
         Board of Directors of said corporation.

                   IN WITNESS WHEREOF, I have hereunto set my hand and
         affixed my official seal the day and year of this certificate
         first above written.

         [NOTARIAL SEAL]                   _________________________
                                                 Notary Public



































                                       -29-


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