Document:

Form of Supplemental Indenture

 Exhibit 4.3 
  
 CENTERPOINT ENERGY RESTORATION BOND COMPANY, LLC 
 Issuer 
  
 and 
  
 DEUTSCHE BANK TRUST COMPANY AMERICAS 
 Trustee 
  
  
 FIRST SUPPLEMENTAL INDENTURE 
  
 Dated as of
[            ], 2009 
  
  

 
 Senior Secured
System Restoration Bonds 

 This FIRST SUPPLEMENTAL INDENTURE dated as of
[            ], 2009 (this “Supplement”), by and among CenterPoint Energy Restoration Bond Company, LLC, a Delaware limited liability company (the
“Issuer”), and Deutsche Bank Trust Company Americas, a New York banking corporation, in its capacity as trustee (the “Trustee”), is entered into pursuant to the Indenture dated as of even date herewith between the
Issuer and the Trustee (the “Indenture”). 
 PRELIMINARY STATEMENT; GRANTING CLAUSE 
 The Issuer has duly authorized the execution and delivery of this Supplement and the creation of System Restoration Bonds with an initial
aggregate principal amount of $[            ] to be known as the Issuer’s Senior Secured System Restoration Bonds (the “Bonds”). All things necessary to make
the Bonds, when duly executed by the Issuer and authenticated by or on behalf of the Trustee as provided in the Indenture and this Supplement and issued by the Issuer, the valid, binding and legal obligations of the Issuer and to make this
Supplement a valid and enforceable supplement to the Indenture have been done, performed and fulfilled and the execution and delivery hereof have been in all respects duly and lawfully authorized. The Issuer and the Trustee are executing and
delivering this Supplement in order to provide for the Bonds. In connection with the execution and delivery of this Supplement, the Issuer undertakes and confirms that it will not issue any System Restoration Bonds other than the Bonds provided for
hereby. 
 The “Trust Estate” shall consist of, and the Issuer hereby absolutely and irrevocably Grants to the
Trustee, as trustee for the benefit of the Holders of the Bonds issued and outstanding, all of the Issuer’s right, title and interest whether now owned or hereafter acquired (and whether now existing or hereafter arising), in, to and under
(a) the System Restoration Property relating to the Bonds purchased by the Issuer pursuant to the Sale Agreement relating to the Bonds and all proceeds thereof, (b) the Sale Agreement relating to the Bonds, (c) the Bill of Sale
delivered by the Seller pursuant to the Sale Agreement relating to the Bonds, (d) the Servicing Agreement relating to the Bonds and the Intercreditor Agreement executed in connection therewith, (e) the Administration Agreement,
(f) the Collection Account relating to the Bonds and all subaccounts thereof (including, without limitation, the General Subaccount, the Capital Subaccount and the Excess Funds Subaccount relating to the Bonds) and all cash, securities,
instruments, investment property or other assets credited to or deposited in that Collection Account or any subaccount thereof from time to time or purchased with funds therefrom, and all financial assets and securities entitlements carried therein
or credited thereto, (g) the REP Deposit Account relating to the Bonds, (h) all other property of whatever kind owned from time to time by the Issuer other than any cash released to the Issuer by the Trustee pursuant to Section 8.02
of the Indenture, (i) all present and future claims, demands, causes and choses in action in respect of any or all of the foregoing and (j) all payments on or under and all proceeds of every kind and nature whatsoever in respect of any or
all of the foregoing, including all proceeds of the conversion, voluntary or involuntary, into cash or other liquid property of any or all of the foregoing, all cash proceeds, accounts, accounts receivable, general intangibles, notes, drafts,
acceptances, chattel paper, checks, deposit accounts, insurance proceeds, condemnation awards, payment intangibles, letter-of-credit rights, investment property, commercial tort claims, documents, rights to payment of any and every kind, and other
forms of obligations and receivables, instruments and other property which at any time constitute all or part of or are included in the proceeds of any of the foregoing. 

 Such Grant is made to the Trustee to have and to hold in trust to secure the payment of
principal of and premium, if any, and interest on, and any other amounts (including all fees, expenses, counsel fees and other amounts due and owing to the Trustee) owing in respect of, the Bonds equally and ratably without prejudice, preference,
priority or distinction, except as expressly provided in the Indenture and this Supplement and to secure performance by the Issuer of all of the Issuer’s obligations under the Indenture and this Supplement with respect to the Bonds, all as
provided in the Indenture and this Supplement; provided, however, that in no event shall the proceeds of the issuance of the Bonds constitute a portion of the Trust Estate. 
 The Trustee, as trustee on behalf of the Holders of the Bonds, acknowledges such Grant, accepts the trusts hereunder in accordance with the
provisions hereof and agrees to perform its duties as set forth in the Indenture and this Supplement. 
 ARTICLE I

 DEFINITIONS 
 All terms used in this Supplement that are defined in the Indenture, either directly or by reference therein, have the meanings assigned to such terms in the Indenture, except to the extent such terms are
defined or modified in this Supplement or the context clearly requires otherwise. 
 ARTICLE II 
 OTHER DEFINITIONAL PROVISIONS 
 SECTION 2.01. “Authorized Denominations” means $1,000 and integral multiples thereof, except for one Bond of each Tranche which may be of a smaller denomination. 
 SECTION 2.02. “Expected Amortization Schedule” means Schedule A to this Supplement. 
 SECTION 2.03. “Expected Final Payment Date” means, with respect to any Tranche of the Bonds, the expected final payment
date therefor, as specified in Article IV of this Supplement. 
 SECTION 2.04. “Final Maturity Date”
means, with respect to any Tranche of the Bonds, the final maturity date thereof, as specified in Article IV of this Supplement. 
 SECTION 2.05. “Interest Rate” has the meaning set forth in Article IV of this Supplement. 
 SECTION 2.06. “Issuance Date” has the meaning set forth in Section 3.02 of this Supplement. 
  

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 SECTION 2.07. “Payment Date” has the meaning set forth in
Section 5.01 of this Supplement. 
 SECTION 2.08. “Record Date” shall mean, with respect to any Payment
Date, the close of business on the Business Day immediately prior to such Payment Date. 
 SECTION 2.09. “Required
Capital Amount” has the meaning set forth in Section 5.04 of this Supplement. 
 ARTICLE III 
 DESIGNATION; ISSUANCE DATE; SOLE SERIES 
 SECTION 3.01. DESIGNATION. The Bonds shall be designated generally as the Issuer’s Senior Secured System Restoration Bonds and further denominated as Tranche A-1, Tranche A-2 or Tranche A-3, as
applicable. 
 SECTION 3.02. ISSUANCE DATE. The Bonds that are authenticated and delivered by the Trustee to or upon the
written order of the Issuer on [            ], 2009 (the “Issuance Date”) shall have as their date of authentication
[            ], 2009. 
 SECTION 3.03. BOOK-ENTRY. Upon
original issuance, the Bonds will be issued in the form of a typewritten Bond or Bonds representing the Book-Entry Bonds, to be delivered to DTC, as the initial Clearing Agency, by, or on behalf of, the Issuer, pursuant to Section 2.11 of the
Indenture. 
 SECTION 3.04. NO ADDITIONAL SERIES. The Issuer commits that the Bonds are the only System Restoration Bonds that
the Issuer will issue and that no additional series of System Restoration Bonds will be issued by the Issuer. 
 ARTICLE IV

 INITIAL PRINCIPAL BALANCE; INTEREST RATE; EXPECTED 
 FINAL PAYMENT DATE; FINAL MATURITY DATE 
 (a) The Bonds of each Tranche of the Senior Secured System Restoration Bonds shall have the initial principal balance, Expected Final Payment Date and Final Maturity Date and bear interest at the interest rate (the “Interest
Rate”) as set forth below: 
  

									
	 Tranche
	  	 Initial Principal
 Balance
	  	 Expected Final
 Payment Date
	  	 Final
 Maturity Date
	  	 Interest Rate

	 A-1
	  		  		  		  	
	 A-2
	  		  		  		  	
	 A-3
	  		  		  		  	

  

 3 

 (b) The Expected Final Payment Date for each Tranche of the Bonds will be
the date when the outstanding principal balance of that Tranche will be reduced to zero if payments are made according to the Expected Amortization Schedule for that Tranche. The Final Maturity Date for each Tranche of the Bonds will be the date
when the Issuer is required to pay the entire remaining unpaid principal balance, if any, of all outstanding Bonds of that Tranche. 
 (c) Interest on the Bonds will be paid before Principal of the Bonds. If there is a shortfall in the amounts available in the Collection Account to make interest payments, the Trustee will distribute
Interest Pro Rata to each Outstanding Tranche of Bonds based on the amount of Interest payable on each Outstanding Tranche. Interest on the Bonds will be calculated on the basis of a 360-day year of twelve 30-day months. 
 ARTICLE V 
 PAYMENT DATES; EXPECTED AMORTIZATION SCHEDULE 
 FOR PRINCIPAL; INTEREST; REQUIRED CAPITAL AMOUNT; WATERFALL
CAPS 
 SECTION 5.01. PAYMENT DATES. The “Payment Dates” for the Bonds are
[            ] and [            ] of each year or, if any such date is not a Business Day, the next succeeding
Business Day, commencing on [            ], 2010, and continuing until the earlier of repayment of such Tranche in full and the applicable Final Maturity Date. 
 SECTION 5.02. EXPECTED AMORTIZATION SCHEDULE FOR PRINCIPAL. Unless an Event of Default has occurred and is continuing and the unpaid
principal amount of all Tranches of Bonds has been declared to be due and payable together with accrued and unpaid interest thereon, on each Payment Date the Trustee shall distribute to the Holders of record of the Bonds as of the related Record
Date amounts payable in respect of the Bonds pursuant to Section 8.02(d) of the Indenture as Principal, so that the outstanding Principal balance as of such Payment Date (after giving effect to all payments of Principal, if any, made on such
Payment Date) has been reduced to the extent possible to the Principal balance specified in the Expected Amortization Schedule but not less than such Principal balance. Unless an Event of Default has occurred and is continuing and the unpaid
principal amount of all Tranches of Bonds has been declared to be due and payable together with accrued and unpaid interest thereon, payments of Principal on any Tranche A-2 Bonds shall not be made on any Payment Date until the Principal balance of
the Tranche A-1 Bonds has been reduced to zero, and payments of Principal on any Tranche A-3 Bonds shall not be made on any Payment Date until the Principal balance of the Tranche A-2 Bonds and the Tranche A-1 Bonds has been reduced to zero;
provided, however, that payments of Principal on the Tranche A-2 Bonds may be made on the Payment Date that the Principal balance of the Tranche A-1 Bonds has been reduced to zero, and payments of Principal on the Tranche A-3 Bonds may be made on
the Payment Date that the Principal balance of the Tranche A-2 Bonds has been reduced to zero. 
 SECTION 5.03. INTEREST.
Interest will be payable on each Tranche of the Bonds on each Payment Date as follows: 
 (a) if there has been a
payment default, any Interest payable but unpaid on any prior Payment Date, together with Interest on such unpaid Interest, if any, and 
 (b) accrued Interest on the principal balance of each Tranche of the Bonds as of the close of business on the preceding Payment Date, or the date of the original issuance of the Tranche of the Bonds, as
applicable, after giving effect to all payments of Principal made on the preceding Payment Date; 
  

 4 

 provided, however, that, with respect to the initial Payment Date or if no payment has
yet been made, Interest on the outstanding principal balance shall accrue from and including the Issuance Date to, but excluding, the following Payment Date, and thereafter from and including the previous Payment Date to, but excluding, the
applicable Payment Date until the Bonds have been paid in full, at the interest rate indicated in Article IV. 
 SECTION
5.04. REQUIRED CAPITAL AMOUNT. The “Required Capital Amount” for the Bonds shall be $[            ], which is equal to [0.5]% of the initial outstanding principal
balance of the Bonds. 
 SECTION 5.05. PREMIUM. There will be no early redemption of the Bonds, and therefore no Premium will
be payable in connection with the early redemption of the Bonds. 
 SECTION 5.06. WATERFALL CAPS. The amount payable with
respect to the Bonds pursuant to Section 8.02(d)(i) of the Indenture shall not exceed $[            ] during any calendar year. 
 ARTICLE VI 
 AUTHORIZED DENOMINATIONS 
 The Bonds shall be issuable in the Authorized Denominations. 
 ARTICLE VII 
 REDEMPTION 
 The Bonds shall not be subject to mandatory or optional redemption. 
 ARTICLE VIII 
 CREDIT ENHANCEMENT 
 No credit enhancement (other than the Capital Subaccount and any adjustments to the System
Restoration Charges approved by the PUCT as provided in the Public Utility Regulatory Act) is provided for the Bonds. 
 ARTICLE IX 
 DELIVERY AND PAYMENT FOR THE BONDS; FORM OF THE BONDS 
 The Trustee shall deliver or cause to be delivered the Bonds to the Issuer when authenticated in accordance with Section 2.02 of the
Indenture. Each Bond shall be in the form of Exhibit A hereto, which is incorporated herein by reference. 
  

 5 

 ARTICLE X 
 MISCELLANEOUS 
 SECTION 10.01. CONFIRMATION OF INDENTURE. As supplemented
by this Supplement, the Indenture is in all respects ratified and confirmed and the Indenture, as so supplemented by this Supplement, shall be read, taken, and construed as one and the same instrument. 
 SECTION 10.02. EFFECTS OF HEADINGS. The Article and Section headings herein are for convenience only and shall not affect the construction
hereof. 
 SECTION 10.03. COUNTERPARTS. This Supplement may be executed in any number of counterparts, each of which when so
executed shall be deemed to be an original, but all of such counterparts shall together constitute but one and the same instrument. 
 SECTION 10.04. GOVERNING LAW. THIS SUPPLEMENT SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS, AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE PARTIES HEREUNDER SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS.

 SECTION 10.05. RIGHTS OF TRUSTEE AND OTHERS. The Trustee, the authenticating agent, the Bond Registrar and the Paying Agent
shall be entitled to the same rights, protections, immunities, and indemnities set forth in the Indenture as if specifically set forth herein. 
  

 6 

 IN WITNESS WHEREOF, the Issuer and the Trustee have caused this Supplement to be duly executed by their
respective officers thereunto duly authorized as of the day and year first above written. 
  

					
	 CENTERPOINT ENERGY RESTORATION
 BOND COMPANY, LLC,
 as Issuer

		
	By:	 	 
		 	Name:
		 	Title:
	
	 DEUTSCHE BANK TRUST COMPANY
 AMERICAS,
 not in its individual capacity but solely as
 Trustee on behalf of the Bondholders

		
	By:	 	 
		 	Name:
		 	Title:
		
	By:	 	 
		 	Name:
		 	Title:

  

 7 

 SCHEDULE A 
 Expected Amortization Schedule 
 Outstanding Principal Balance

  

							
	 Payment
 Date
	  	 Tranche
 A-1
 Balance
	  	 Tranche
 A-2
 Balance
	  	 Tranche
 A-3
 Balance

	 Initial Principal
 Balance
	  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	
		  		  		  	

 Exhibit A to First Supplemental Indenture 
  

					
	REGISTERED	 	$	 	

 No.
                 
 SEE REVERSE FOR
CERTAIN DEFINITIONS 
 CUSIP NO. 
 THE PRINCIPAL OF THIS TRANCHE [    ] BOND WILL BE PAID IN INSTALLMENTS AS SET FORTH HEREIN. ACCORDINGLY, THE OUTSTANDING PRINCIPAL AMOUNT OF THIS TRANCHE
[    ] BOND AT ANY TIME MAY BE LESS THAN THE AMOUNT SHOWN ON THE FACE HEREOF. THE HOLDER OF THIS TRANCHE [    ] BOND HEREBY COVENANTS AND AGREES THAT PRIOR TO THE DATE THAT IS ONE YEAR AND ONE
DAY AFTER THE PAYMENT IN FULL OF THE TRANCHE [    ] BONDS, IT WILL NOT INSTITUTE AGAINST OR JOIN ANY OTHER PERSON IN INSTITUTING AGAINST THE ISSUER ANY BANKRUPTCY, REORGANIZATION, ARRANGEMENT, INSOLVENCY OR LIQUIDATION
PROCEEDINGS OR OTHER SIMILAR PROCEEDINGS UNDER THE LAWS OF THE UNITED STATES OR ANY STATE OF THE UNITED STATES. 
 CENTERPOINT ENERGY RESTORATION BOND COMPANY, LLC 
 SENIOR SECURED SYSTEM RESTORATION BONDS, Tranche
[    ]. 
  

							
	 Bond Rate
	  	 Initial
Principal Amount
	  	 Expected Final
 Payment Date
	  	 Final
 Maturity Date

	                 %
	  	$                                      
  	  		  	

 CenterPoint Energy Restoration Bond Company, LLC, a limited liability company
organized and existing under the laws of the State of Delaware (herein referred to as the “Issuer”), for value received, hereby promises to pay to the registered holder under Section 2.05 of the Indenture (“Registered
Holder”), or registered assigns, the Initial Principal Amount shown above in semiannual installments on the Payment Dates (as defined below) and in the amounts specified on the reverse hereof or, if less, the amounts determined pursuant to
Section 8.02(d) of the Indenture referred to on the reverse hereof, in each year, commencing on the date determined as provided on the reverse hereof and ending on or before the Final Maturity Date of this Tranche [    ]
Bond, to pay the entire unpaid principal hereof on such Final Maturity Date and to pay Interest, at the Bond Rate shown above, on each [            ] and
[            ], or if any such day is not a Business Day, the next succeeding Business Day, commencing on
[            ], 2010 and continuing until the earlier of the payment of the Principal hereof and the Final Maturity Date of this Tranche [    ] Bond (each a
“Payment Date”), on the Principal amount of this Tranche [    ] Bond outstanding from time to time. Interest on this Tranche [    ] Bond will accrue for each Payment Date from the most
recent Payment Date on which Interest has been paid to

  

 A-1 

 
but excluding such Payment Date or, if no Interest has yet been paid, from [            ], 2009. Interest will be computed on
the basis of a 360-day year of twelve 30-day months. Such Principal of and Interest on this Tranche [    ] Bond shall be paid in the manner specified on the reverse hereof. 
 The Principal of and Interest on this Tranche [    ] Bond are payable in such coin or currency of the United States
of America as at the time of payment is legal tender for payment of public and private debts. All payments made by the Issuer with respect to this Tranche [    ] Bond shall be applied first to Interest due and payable on
this Tranche [    ] Bond as provided above and then to the unpaid Principal of and premium, if any, on this Tranche [    ] Bond, all in the manner set forth in Section 8.02(d) of the Indenture.

 This Tranche [    ] Bond is a “transition bond” as such term is defined in the Public Utility
Regulatory Act. Principal and Interest on this Tranche [    ] Bond are payable from and secured primarily by the system restoration property authorized by the Financing Order. System restoration property is known as
“transition property” in the Public Utility Regulatory Act. The Public Utility Regulatory Act provides that the State of Texas pledges “for the benefit and protection of financing parties and the electric utility, that it will not
take or permit any action that would impair the value of the transition property, or except as permitted . . . [through the Transition Charge Adjustment Process] . . . reduce, alter, or impair the transition charges to be imposed, collected, and
remitted to financing parties, until the principal, interest, and premium, and any other charges incurred and contracts to be performed in connection with the related transition bonds have been paid and performed in full.” 
 Reference is made to the further provisions of this Tranche [    ] Bond set forth on the reverse hereof, which
shall have the same effect as though fully set forth on the face of this Tranche [    ] Bond. 
 Unless
the certificate of authentication hereon has been executed by the Trustee whose name appears below by manual signature, this Tranche [    ] Bond shall not be entitled to any benefit under the Indenture, or be valid or
obligatory for any purpose. 
  

 A-2 

 Unless this certificate is presented by an authorized representative of The Depository Trust
Company, a New York corporation (“DTC”), to Issuer 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. 
  

 A-3 

 IN WITNESS WHEREOF, the Issuer has caused this instrument to be signed, manually or in
facsimile, by an Authorized Officer of the Issuer. 
 Date:
                         
  

					
	 CENTERPOINT ENERGY RESTORATION
BOND COMPANY, LLC

		
	By:	 	 
		 	Name:
                                
		 	Title:
                                

  

 A-4 

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 
 Dated:
                        , 2009 
 This is one of the Tranche [    ] Bonds designated above and referred to in the within-mentioned Indenture. 
  

					
	 DEUTSCHE BANK TRUST COMPANY
AMERICAS,
not in its individual capacity but solely as
Trustee on behalf of the
Bondholders

	
	 [By: [    ],
as Authenticating Agent]

		
	By:	 	 
		 	Name:
		 	Title:

  

 A-5 

 REVERSE OF BOND 
 This Tranche [    ] Senior Secured System Restoration Bond is one of a duly authorized issue of Senior Secured
System Restoration Bonds of the Issuer (herein called the “Bonds”), which are issuable in one or more Tranches, in which this Tranche [    ] Senior Secured System Restoration Bond represents an interest, including
the Tranche [    ] Senior Secured System Restoration Bonds (herein called the “Tranche [    ] Bonds”), all issued and to be issued under an indenture dated as of
[            ], 2009, and a supplemental indenture thereto dated as of even date therewith (such supplemental indenture, as supplemented or amended, the “Supplement” and,
collectively with such indenture, as supplemented or amended, the “Indenture”), each between the Issuer and Deutsche Bank Trust Company Americas as Trustee (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 Trust Estate pledged, the nature and extent of the security and the respective rights, obligations and immunities thereunder of
the Issuer, the Trustee and the Bondholders. All terms used in this Tranche [    ] Bond that are defined in the Indenture, as supplemented or amended, shall have the meanings assigned to them in the Indenture. 
 The Tranche [    ] Bonds and the other Tranche of Bonds issued by the Issuer are and will be equally and ratably
secured by the Trust Estate pledged as security therefor as provided in the Indenture or the Supplement. 
 The Principal of
this Tranche [    ] Bond shall be payable on each Payment Date only to the extent that amounts in the Collection Account are available therefor, and only until the outstanding Principal balance thereof on such Payment Date
(after giving effect to all payments of Principal, if any, made on such Payment Date) has been reduced to the Principal balance specified in the Expected Amortization Schedule which is attached to the Supplement as Schedule A, unless payable
earlier because an Event of Default shall have occurred and be continuing and the Trustee or the Bondholders representing not less than a majority of the Outstanding Amount of the Bonds have declared the Bonds to be immediately due and payable in
accordance with Section 5.02 of the Indenture. However, actual Principal payments may be made in less than expected amounts and at later than expected times as determined pursuant to Section 8.02(d) of the Indenture and Section 5.02
of the Supplement. The entire unpaid Principal amount of this Tranche [    ] Bond shall be due and payable on the Final Maturity Date of this Tranche [    ] Bond. Notwithstanding the foregoing, the entire
unpaid Principal amount of the Bonds shall be due and payable, if not then previously paid, on the date on which an Event of Default shall have occurred and be continuing and the Trustee or the Bondholders representing a majority of the Outstanding
Amount of the Bonds have declared the Bonds to be immediately due and payable in the manner provided in Section 5.02 of the Indenture. All Principal payments on the Tranche [    ] Bonds shall be made pro rata to the
Tranche [    ] Bondholders entitled thereto based on the respective Principal amounts of the Bonds held by them. 
 Payments of Interest on this Tranche [    ] Bond due and payable on each Payment Date, together with the installment of Principal or premium, if any, due on this
Tranche [    ] Bond on such Payment Date shall be made by check mailed first-class, postage prepaid, to the Person whose name appears as the Holder of this Tranche [    ] Bond in the Bond Register as
of the close of business on the Record Date or in such other manner as may be provided in the Supplement,

  

 A-6 

 
except that with respect to Tranche [    ] Bonds registered on the Record Date in the name of a Clearing Agency, payments will be made by wire transfer in immediately
available funds to the account designated by such Clearing Agency and except for the final installment of Principal and premium, if any, payable with respect to this Tranche [    ] Bond on a Payment Date which shall be
payable as provided below. Such checks shall be mailed to the Person entitled thereto at the address of such Person as it appears in the Bond Register as of the applicable Record Date without requiring that this
Tranche [    ] Bond be submitted for notation of payment. Any reduction in the Principal amount of this Tranche [    ] Bond (or any one or more predecessors to such Bond) effected by any payments
made on any Payment Date shall be binding upon all future Bondholders of this Tranche [    ] Bond and of any Tranche [    ] Bond issued upon the registration of transfer hereof or in exchange hereof
or in lieu hereof, whether or not noted hereon. If funds are expected to be available, as provided in the Indenture, for payment in full of the then remaining unpaid Principal amount of this Tranche [    ] Bond on a Payment
Date, then the Trustee, in the name of and on behalf of the Issuer, will notify the Person who was the Holder hereof as of the preceding Record Date to such Payment Date by notice mailed no later than five days prior to such final Payment Date and
shall specify that such final installment will be payable to the Holder hereof as of the Record Date immediately preceding such final Payment Date and only upon presentation and surrender of this Tranche [    ] Bond and
shall specify the place where this Tranche [    ] Bond may be presented and surrendered for payment of such installment. 
 The Issuer shall pay Interest on overdue installments of Interest on this Tranche [    ] Bond at the Bond Rate for Tranche [    ] to the extent lawful.

 As provided in the Indenture and subject to certain limitations set forth therein, the transfer of this
Tranche [    ] Bond may be registered in the Bond Register upon surrender of this Tranche [    ] Bond for registration of transfer at the office or agency designated by the Issuer pursuant to the
Indenture, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Trustee duly executed by the Holder hereof or his attorney duly authorized in writing, with such signature guaranteed by an Eligible
Guarantor Institution, and thereupon one or more new Tranche [    ] Bonds of any Authorized Denominations and in the same aggregate unpaid Principal amount will be issued to the designated transferee or transferees. No
service charge will be charged for any registration of transfer or exchange of this Tranche [    ] Bond, but the transferor may be required to pay a sum sufficient to cover any tax or other governmental charge that may be
imposed in connection with any registration of transfer or exchange. 
 Prior to the due presentment for registration of
transfer of this Tranche [    ] Bond, the Issuer, the Trustee and any agent of the Issuer or the Trustee may treat the Person in whose name this Tranche [    ] Bond is registered (as of the day of
determination) as the owner hereof for the purpose of receiving payments of Principal of and premium, if any, and Interest on this Tranche [    ] Bond and for all other purposes whatsoever, whether or not this
Tranche [    ] Bond be overdue, and neither the Issuer, the Trustee nor any such agent shall be affected by notice to the contrary. 
  

 A-7 

 The Indenture permits, with certain exceptions as therein provided, the amendment thereof
and the modification of the rights and obligations of the Issuer and the rights of the Bondholders under the Indenture at any time by the Issuer with the consent of the Bondholders representing a majority of the Outstanding Amount of all Bonds at
the time Outstanding of each Tranche to be affected. The Indenture also contains provisions permitting the Bondholders representing specified percentages of the Outstanding Amount of the Bonds, on behalf of all Bondholders, to waive compliance by
the Issuer with certain provisions of the Indenture and certain past defaults under the Indenture and their consequences. Any such consent or waiver by the Bondholders of this Tranche [    ] Bond (or any one or more
predecessors of such Bonds) shall be conclusive and binding upon such Bondholder and upon all future Bondholders of this Tranche [    ] Bond and of any Tranche [    ] Bond issued upon the
registration of transfer hereof or in exchange hereof or in lieu hereof whether or not notation of such consent or waiver is made upon this Tranche [    ] Bond. The Indenture also permits the Trustee to amend or waive
certain terms and conditions set forth in the Indenture without the consent of the Bondholders. 
 For so long as the Servicer
and Issuer are each disregarded as an entity separate from CenterPoint Energy, Inc., a Texas corporation (“CenterPoint Energy”), under U.S. Treasury Regulations §§ 301.7701-2 and -3, each Bond Owner, by acquiring a
beneficial interest, agrees to treat such Bond as indebtedness of CenterPoint Energy for federal income (and, to the extent applicable, state and local income and franchise) tax purposes unless otherwise required by appropriate taxing authorities.
For any time period other than that in which the Servicer and Issuer are each disregarded as an entity separate from CenterPoint Energy or to the extent the appropriate taxing authorities require a tax treatment contrary to that described in the
preceding sentence, each Bond Owner agrees to treat such Bond as indebtedness of the Issuer or such other party as is required by the appropriate taxing authority. For purposes other than federal income (and, to the extent applicable, state and
local income and franchise) tax purposes, each Bond Owner is looking to the Issuer for payment of the amounts due and payable hereunder. 
 The term “Issuer” as used in this Tranche [    ] Bond includes any successor to the Issuer under the Indenture. 
 The Issuer is permitted by the Indenture, under certain circumstances, to merge or consolidate. 
 The Tranche [    ] Bonds are issuable only in registered form in Authorized Denominations as provided in the
Indenture and the Supplement, subject to certain limitations therein set forth. 
 THIS
TRANCHE [    ] BOND, THE INDENTURE AND THE SUPPLEMENT SHALL BE CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF TEXAS, WITHOUT REFERENCE TO ITS CONFLICT OF LAW PROVISIONS, AND THE OBLIGATIONS, RIGHTS AND REMEDIES OF THE
PARTIES HEREUNDER AND THEREUNDER SHALL BE DETERMINED IN ACCORDANCE WITH SUCH LAWS. 
 No reference herein to the Indenture
and no provision of this Tranche [    ] Bond or of the Indenture shall alter or impair the obligation of the Issuer, which is absolute and unconditional, to pay the Principal of and Interest on this
Tranche [    ] Bond at the times, place, and rate, and in the coin or currency herein prescribed. 
 ASSIGNMENT 
 Social Security or taxpayer I.D. or other identifying number of assignee
                        . 
  

 A-8 

 FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto
                         
 (name and address of assignee) 
 the Tranche [    ] Bond and all rights
thereunder, and hereby irrevocably constitutes and appoints 
 (name and address of appointee) 
 attorney, to transfer said Tranche [    ] Bond on the books kept for registration thereof, with full power of substitution in the
premises. 
  

									
	 Dated:
	 		 		 		 	
					
	 	 		 	 	 	*	 	
		 		 	 Signature Guaranteed:
	 		 	
					
	 	 		 	 	 		 	

 * NOTE: The signature to this assignment must correspond with the name of the registered owner as it
appears on the face of the Tranche [    ] Bond in every particular, without alteration, enlargement or any change whatsoever. 
  

 A-9Supplemental Indenture

 Exhibit 4.3 
 EXECUTION COPY 
 MASTEC, INC. 
 TO 
 U.S.
BANK NATIONAL ASSOCIATION, 
 As Trustee 
 GUARANTEED TO THE EXTENT SET FORTH HEREIN BY THE GUARANTORS 
 NAMED HEREIN

 SECOND SUPPLEMENTAL INDENTURE 
 Dated as of November 10, 2009 
 to the 
 INDENTURE 
 Dated as of June 5, 2009 
 4.25% SENIOR CONVERTIBLE NOTES DUE 2014 

 TABLE OF CONTENTS 
  

					
	 	  	 	  	Page
	
	 ARTICLE I

	
	 DEFINITIONS

			
	Section 1.01.	  	 Relation to Base Indenture
	  	2
			
	Section 1.02.	  	 Definitions
	  	2
	
	 ARTICLE II

	
	 ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES

			
	Section 2.01.	  	 Designation and Amount
	  	8
			
	Section 2.02.	  	 Form of Notes
	  	8
			
	Section 2.03.	  	 Date and Denomination of Notes; Payments of Interest
	  	9
			
	Section 2.04.	  	 Intentionally Omitted
	  	9
			
	Section 2.05.	  	 Intentionally Omitted
	  	9
			
	Section 2.06.	  	 Exchange and Registration of Transfer of Notes; Restrictions on Transfer; Depositary
	  	9
			
	Section 2.07.	  	 Additional Notes; Repurchases
	  	11
			
	Section 2.08.	  	 No Sinking Fund
	  	11
			
	Section 2.09.	  	 Ranking
	  	11
			
	Section 2.10.	  	 Automatic Exchange from Restricted Global Note to Unrestricted Global Note
	  	11
	
	 ARTICLE III

	
	 REDEMPTION

			
	Section 3.01.	  	 No Right to Redeem
	  	13
	
	 ARTICLE IV

	
	 PARTICULAR COVENANTS OF THE COMPANY

			
	Section 4.01.	  	 Payment of Principal and Interest
	  	13

					
	Section 4.02.	  	 Maintenance of Office or Agency for Conversion Agent
	  	14
			
	Section 4.03.	  	 Reports by Company; 144A Information
	  	14
			
	Section 4.04.	  	 Subsidiary Guarantors
	  	15
			
	Section 4.05.	  	 Exclusion of Certain Provisions From Base Indenture
	  	15
	
	 ARTICLE V

	
	 DEFAULTS AND REMEDIES

			
	Section 5.01.	  	 Events of Default
	  	16
			
	Section 5.02.	  	 Filing Failure; Additional Interest
	  	16
			
	Section 5.03.	  	 Waiver of Past Defaults
	  	17
			
	Section 5.04.	  	 Article Five of Base Indenture
	  	17
			
	Section 5.05.	  	 Restricted Securities; Additional Interest
	  	18
	
	 ARTICLE VI

	
	 SUPPLEMENTAL INDENTURES

			
	Section 6.01.	  	 Supplemental Indentures Without Consent of Noteholders
	  	18
			
	Section 6.02.	  	 Modification and Amendment with Consent of Noteholders
	  	19
			
	Section 6.03.	  	 Effect of Supplemental Indentures
	  	19
			
	Section 6.04.	  	 Article Nine of Base Indenture
	  	19
	
	 ARTICLE VII

	
	 CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE

			
	Section 7.01.	  	 Consolidation, Merger and Sale of Assets
	  	19
	
	 ARTICLE VIII

	
	 CONVERSION OF NOTES

			
	Section 8.01.	  	 Conversion Privilege
	  	20
			
	Section 8.02.	  	 Conversion Procedures
	  	21
			
	Section 8.03.	  	 Payments Upon Conversion
	  	23

  

 ii 

					
	Section 8.04.	  	 Adjustment of Conversion Rate
	  	24
			
	Section 8.05.	  	 Shares to be Fully Paid
	  	31
			
	Section 8.06.	  	 Effect of Reclassification, Consolidation, Merger or Sale
	  	31
			
	Section 8.07.	  	 Intentionally Omitted
	  	32
			
	Section 8.08.	  	 Intentionally Omitted
	  	32
			
	Section 8.09.	  	 Notice to Holders Prior to Certain Actions
	  	32
			
	Section 8.10.	  	 Shareholder Rights Plans
	  	33
	
	 ARTICLE IX

	
	 REPURCHASE OF NOTES AT OPTION OF HOLDERS

			
	Section 9.01.	  	 Repurchase of Securities at Option of the Holder on Specified Dates
	  	33
			
	Section 9.02.	  	 Repurchase at Option of Holders Upon a Fundamental Change
	  	33
			
	Section 9.03.	  	 No Payment Following Acceleration of the Notes
	  	37
			
	Section 9.04.	  	 Compliance with Tender Offer Rules
	  	37
	
	 ARTICLE X

	
	 MISCELLANEOUS PROVISIONS

			
	Section 10.01.	  	 Ratification of Base Indenture
	  	38
			
	Section 10.02.	  	 Provisions Binding on Company’s Successors
	  	38
			
	Section 10.03.	  	 Official Acts by Successor Corporation
	  	38
			
	Section 10.04.	  	 Addresses for Notices, Etc.
	  	38
			
	Section 10.05.	  	 Governing Law
	  	38
			
	Section 10.06.	  	 Non-Business Day
	  	39
			
	Section 10.07.	  	 Benefits of Indenture
	  	39
			
	Section 10.08.	  	 Table of Contents, Headings, Etc.
	  	39
			
	Section 10.09.	  	 Counterparts
	  	39
			
	Section 10.10.	  	 Trustee
	  	39

  

 iii 

					
	Section 10.11.	  	 Further Instruments and Acts
	  	39
			
	Section 10.12.	  	 Waiver of Jury Trial
	  	39
			
	Section 10.13.	  	 Force Majeure
	  	39
			
	Section 10.14.	  	 Calculations
	  	40
	
	 ARTICLE XI

	
	 GUARANTEES

			
	Section 11.01.	  	 Guarantee
	  	40
			
	Section 11.02.	  	 Limitation on Guarantor Liability
	  	41
			
	Section 11.03.	  	 Execution and Delivery of Guarantees
	  	41
			
	Section 11.04.	  	 Contribution
	  	42
			
	Section 11.05.	  	 Releases
	  	42

  

			
	Schedule A	  	Additional Share Table
	Schedule B	  	List of Guarantors
	Exhibit A	  	Form of Notes
	Exhibit B	  	Form of Conversion Notice
	Exhibit C	  	Form of Fundamental Change Repurchase Notice
	Exhibit D	  	Form of Assignment and Transfer
	Exhibit E	  	Form of Restrictive Legend for Common Stock Issued upon Conversion

  

 iv 

 SECOND SUPPLEMENTAL INDENTURE 
 4.25% Senior Convertible Notes due 2014 
 THIS SECOND
SUPPLEMENTAL INDENTURE, dated as of November 10, 2009 (this “Supplemental Indenture”), by and among MASTEC, INC., a Florida Corporation (the “Company”), the guarantors listed on Schedule B hereto, as
such schedule may be amended form time to time (collectively, the “Guarantors” and each, a “Guarantor”), and U.S. BANK NATIONAL ASSOCIATION, a national association, as Trustee hereunder (the
“Trustee”). 
 RECITALS OF THE COMPANY: 
 WHEREAS, the Company, the Guarantors and the Trustee have heretofore entered into an Indenture dated as of June 5, 2009 (the
“Base Indenture” and, together with this Supplemental Indenture, the “Indenture”) providing for (i) the issuance by the Company from time to time of its senior debt securities evidencing its unsecured and
unsubordinated indebtedness, in an unlimited aggregate principal amount, in one or more series (collectively, the “Securities” and each, a “Security”) and (ii) the guarantee of such Securities by the Guarantors
(collectively, the “Guarantees” and each, a “Guarantee”); 
 WHEREAS, Section 901(7) of
the Base Indenture provides for the Company, the Guarantors and the Trustee to enter into an indenture supplemental to the Base Indenture to establish the form and terms of Securities of any series as provided by Sections 201 and 301 of the Base
Indenture and the form and terms of Guarantees as provided by Sections 1701 and 301 of the Base Indenture, without the consent of the Holders of any Securities; 
 WHEREAS, for its lawful corporate purposes, the Company has duly authorized the issue of its 4.25% Senior Convertible Notes due 2014 (together with the Guarantees thereof, the “Notes”),
initially in an aggregate principal amount not to exceed $100,000,000; 
 WHEREAS, in order to provide the terms and conditions
upon which the Notes are to be authenticated, issued and delivered, the Board of Directors of the Company and each of the Guarantors has duly authorized the execution and delivery of this Supplemental Indenture; and 
 WHEREAS, the Notes, the certificate of authentication to be borne by the Notes, a form of assignment, a form of the Fundamental Change
Repurchase Notice, a form of conversion notice and certificate of assignment and transfer to be borne by the Notes are to be substantially in the forms hereinafter provided for; 
 WHEREAS, all acts and things necessary to make this Supplemental Indenture a valid agreement of each of the Company and the Guarantors
according to its terms have been done and performed; and 
 WHEREAS, all acts and things necessary to make the Notes, when
executed by the Company and authenticated and delivered by the Trustee as provided in the Indenture and this Supplemental Indenture, the valid and binding obligations of the Company have been done and performed. 

 NOW THEREFORE, SUPPLEMENTAL INDENTURE WITNESSETH: 
 For and in consideration of the premises and of the covenants contained herein and in the Base Indenture, the Company, the Guarantors and
the Trustee covenant and agree, for the equal and proportionate benefit of all Holders of the Notes issued on or after the date of this Supplemental Indenture, as follows: 
 ARTICLE I 
 DEFINITIONS 
 Section 1.01. Relation to Base Indenture The changes, modifications and supplements to the Base Indenture effected by this
Supplemental Indenture shall be applicable only with respect to, and shall only govern the terms of, the Notes, which may be issued from time to time, and shall not apply to any other Securities that may be issued under the Base Indenture unless a
supplemental indenture with respect to such other Securities specifically incorporates such changes, modifications and supplements. The provisions of this Supplemental Indenture shall supersede any corresponding or conflicting provisions and
definitions in the Base Indenture. 
 Section 1.02. Definitions For all purposes of this Supplemental Indenture, except
as otherwise expressly provided for or unless the context otherwise requires: 
 (a) Capitalized terms used but
not defined herein shall have the respective meanings assigned to them in the Base Indenture; 
 (b) Terms
defined both herein and in the Base Indenture shall have the meanings assigned to them herein; 
 (c) All
references herein to Articles and Sections, unless otherwise specified, refer to the corresponding Articles and Sections of this Supplemental Indenture; and 
 (d) All other terms used in this Supplemental Indenture, which are defined in the Trust Indenture Act or which are by
reference therein defined in the Securities Act (except as herein otherwise expressly provided or unless the context otherwise requires) shall have the meanings assigned to such terms in said Trust Indenture Act and in said Securities Act as in
force at the date of the execution of this Supplemental Indenture. The words “herein,” “hereof,” “hereunder,” and words of similar import refer to this Supplemental Indenture as a whole and not to any particular
Article, Section or other subdivision. The terms defined in this Article Include the plural as well as the singular. 
 “Additional Interest” shall have the meaning specified in Section 5.05. 
 “Additional
Interest Period” shall have the meaning specified in Section 5.05. 
 “Additional Notes” shall
have the meaning specified in Section 2.07. 
 “Additional Shares” shall have the meaning specified in
Section 8.01(b). 
  

 2 

 “Automatic Exchange” shall have the meaning specified in Section 2.10.

 “Automatic Exchange Notice” shall have the meaning specified in Section 2.10. 
 “Business Day” means any day, other than a Saturday or Sunday, or legal holidays on which banks in The City of New York are
not required or authorized by law or executive order to be closed. 
 “Close of Business” means 5:00 p.m. (New
York City time). 
 “Common Stock” means, subject to Section 8.06, shares of common stock of the Company,
par value $0.10 per share, at the date of this Supplemental Indenture or shares of any class or classes resulting from any reclassification or reclassifications thereof and that have 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 Company and that are not subject to redemption by the Company; provided that if at any time there shall be more than one such resulting class, 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. 
 “Commission” means the U.S. Securities and Exchange Commission. 
 “Company” means the Person named as the “Company” in the first paragraph of this Supplemental Indenture until a
successor corporation shall have become such pursuant to the applicable provisions of the Indenture, and thereafter “Company” shall mean such successor corporation. 
 “Continuing Directors” means, as of any date of determination, any member of the Board of Directors who: 
 (a) was a member of the board of directors on the date of this Supplemental Indenture; or 
 (b) was nominated for election or elected to the Board of Directors with the approval of a majority of the Continuing
Directors who were members of the Board of Directors at the time of the new director’s nomination or election. 
 “Conversion Agent” shall mean the Trustee or any successor office or agency where the Notes may be surrendered for exchange. 
 “Conversion Date” shall have the meaning specified in Section 8.02(b). 
 “Conversion Obligation” shall have the meaning specified in Section 8.01(a). 
 “Conversion Price” means as of any date $1,000 divided by the Conversion Rate as of such date. 
 “Conversion Notice” shall have the meaning specified in Section 8.02(b). 
  

 3 

 “Conversion Rate” shall have the meaning specified in Section 8.01(a).

 “Depositary” means, with respect to the Notes issuable or issued in whole or in part in global form, the
person specified in the Notes as the Depositary with respect to such Notes, until a successor shall have been appointed, and thereafter, “Depositary” shall mean or include such successor. 
 “Distributed Property” shall have the meaning specified in Section 8.04(c). 
 “Effective Date” shall have the meaning specified in Section 8.01(b)(2). 
 “Event of Default” means, with respect to the Notes, any event specified in Section 5.01, continued for the period of
time, if any, and after the giving of notice, if any, therein designated. 
 “Ex-Dividend Date” means the first
date upon which a sale of the Common Stock does not automatically transfer the right to receive the relevant dividend from the seller of the Common Stock to its buyer. 
 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. 
 “Filing Additional Interest” shall have the meaning specified in Section 5.02. 
 “Filing Failure” shall have the meaning specified in Section 5.02. 
 “Fundamental Change” will be deemed to have occurred when any of the following has occurred: 
 (a) the consummation of any transaction (including, without limitation, any merger or consolidation) the result of which is
that any “person” becomes the “beneficial owner” (as these terms are defined in Rule 13d-3 and Rule 13d-5 under the Exchange Act) of more than 50% of the Capital Stock of the Company that is at that time entitled to vote by the
holder thereof in the election of the Board of Directors (or comparable body); or 
 (b) the first day on which a
majority of the members of the Board of Directors are not Continuing Directors; 
 (c) the adoption of a plan
relating to the liquidation or dissolution of the Company; 
  

 4 

 (d) the consolidation or merger of the Company with or into any other
Person, or the sale, lease, transfer, conveyance or other disposition, in one or a series of related transactions, of all or substantially all of the assets of the Company and those of its Subsidiaries taken as a whole to any “person” (as
this term is used in Section 13(d)(3) of the Exchange Act); other than: 
 (i) any transaction (x) that
does not result in any reclassification, conversion, exchange or cancellation of outstanding shares of Capital Stock of the Company; and (y) pursuant to which the holders of 50% or more of the total voting power of all shares of Capital Stock
of the Company entitled to vote generally in elections of directors immediately prior to such transaction have the right to exercise, directly or indirectly, 50% or more of the total voting power of all shares of Capital Stock of the Company
entitled to vote generally in elections of directors of the continuing or surviving Person immediately after giving effect to such transaction; or 
 (ii) any merger primarily for the purpose of changing the jurisdiction of incorporation of the Company and resulting in a reclassification, conversion or exchange of outstanding shares of Common Stock
solely into shares of common stock of the surviving entity; 
 (e) the termination of trading of Common Stock,
which will be deemed to have occurred if the Common Stock or other common stock into which the Notes are convertible is not listed on the New York Stock Exchange, the NASDAQ Global Select Market or the NASDAQ Global Market. 
 Notwithstanding the foregoing, any transaction or event described above will not constitute a Fundamental Change if, in connection with such
transaction or event, or as a result therefrom, a transaction described in clauses (a), (d) or (e) above occurs (without regard to any exclusion in clauses (d)(i)(x) and (y) thereunder) and at least 90% of the consideration paid for
Common Stock (excluding cash payments for fractional shares, cash payments made pursuant to dissenters’ appraisal rights and cash dividends) consist of shares of common stock (or depositary receipts in respect thereof) traded on any of the New
York Stock Exchange, the NASDAQ Global Market or the NASDAQ Global Select Market (or any of their respective successors) (or will be so traded or quoted immediately following the completion of the merger or consolidation or such other transaction)
and, as a result of such transaction, the Notes become convertible under Section 8.06 hereof. 
 “Fundamental
Change Company Notice” shall have the meaning specified in Section 9.02(b). 
 “Fundamental Change
Repurchase Date” shall have the meaning specified in Section 9.02(a)(i). 
 “Fundamental Change Repurchase
Notice” shall have the meaning specified in Section 9.02(a). 
  

 5 

 “Fundamental Change Repurchase Price” shall have the meaning specified in
Section 9.02(a). 
 “Global Note” shall have the meaning specified in Section 2.06(f). 
 “Guaranteed Indebtedness” shall have the meaning specified in Section 4.04(a) 
 “Initial Notes” means the Notes issued on the date of this Supplemental Indenture. 
 “interest” means, when used with reference to the Notes, any interest payable under the terms of the Notes. 
 “Interest Payment Date” means June 15 and December 15 of each year, beginning on June 15, 2010. 

“Last Reported Sale Price” means, with respect to Common Stock or any other security for which a Last Reported Sale
Price must be determined, on any date, the closing sale price per share of Common Stock or unit of such other security (or, if no closing sale price is reported, the average of the last bid and last ask prices or, if more than one in either case,
the average of the average last bid and the average last ask prices) on such date as reported in composite transactions for the principal U.S. securities exchange on which Common Stock or such other security are traded. If the Common Stock or such
other security are not listed for trading on a United States national or regional securities exchange on the relevant date, the Last Reported Sale Price shall be the last quoted bid price per share of Common Stock or such other security in the
over-the-counter market on the relevant date, as reported by Pink OTC Markets Inc. or a similar organization. If the Common Stock or such other security are not so quoted, the Last Reported Sale Price shall be the average of the mid-point of the
last bid and ask prices for the Common Stock or such other security on the relevant date from each of at least three nationally recognized independent investment banking firms selected from time to time by the Board of Directors of the Company for
that purpose. The Last Reported Sale Price shall be determined without reference to extended or after hours trading. 
 “Maturity Date” means December 15, 2014. 
 “Merger Event” shall have the
meaning specified in Section 8.06(a). 
 “Note” or “Notes” shall have the meaning
specified in the third paragraph of the recitals of this Supplemental Indenture, and shall include any Additional Notes issued pursuant to Section 2.07. 
 “Noteholder” or “Holder” or “holder,” as applied to any Note, or other similar terms (but excluding the term “beneficial holder”), means any
person in whose name at the time a particular Note is registered on the Security Register. 
 “Opening of
Business” means 9:00 a.m. (New York City time). 
  

 6 

 “Record Date,” with respect to the payment of interest on any Interest
Payment Date, shall have the meaning specified in Section 2.03. 
 “Reference Property” shall have the
meaning specified in Section 8.06(a). 
 “Resale Restriction Termination Date” shall have the meaning
specified in Section 2.06(b). 
 “Restricted Common Stock” shall have the meaning specified in
Section 2.10. 
 “Restricted Common Stock Legend” means the legend set forth in Exhibit E hereto.

 “Restricted Global Note” shall have the meaning specified in Section 2.06(d). 
 “Restricted Note Legend” means the restricted legend set forth in Exhibit A hereto. 
 “Restricted Securities” shall have the meaning specified in Section 2.06(a). 
 “Rule 144” means Rule 144 under the Securities Act, or any similar successor rule or regulation, as amended from time to
time. 
 “Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations
promulgated thereunder. 
 “Spin-Off” shall have the meaning specified in Section 8.04(c). 
 “Stock Price” means the price paid per share of Common Stock in connection with a Fundamental Change pursuant to which
Additional Shares shall be added to the Conversion Rate as set forth in Section 8.01(b) hereof. If holders of Common Stock receive only cash in such Fundamental Change transaction, then the Stock Price shall be the cash amount paid per share.
Otherwise, the Stock Price shall be equal to the average of the Last Reported Sale Prices of the Common Stock over the five consecutive Trading Day period ending on the Trading Day immediately preceding the Effective Date of the Fundamental Change.

 “Trading Day” means a day during which (i) trading in Common Stock generally occurs and (ii) a
Last Reported Sale Price for Common Stock (other than a Last Reported Sale Price referred to in the next to last sentence of such definition) is available for such day; provided that if shares of Common Stock are not admitted for trading or
quotation on or by any exchange, bureau or other organization referred to in the definition of Last Reported Sale Price (excluding the next to last sentence of that definition), Trading Day shall mean any Business Day. 
 “Trigger Event” shall have the meaning specified in Section 8.04(c). 
 “Unrestricted Global Note” shall have the meaning specified in Section 2.06(d). 
  

 7 

 “Wholly Owned Domestic Subsidiary” means, with respect to any Person, any
corporation or other entity which is not a controlled foreign corporation under Section 957 of the Internal Revenue Code of which 100% of (i) the voting power of the voting equity securities or (ii) the outstanding equity interests of
which are owned, directly or indirectly, by such Person. For the purposes of this definition, “voting equity securities” means equity securities having voting power for the election of directors, whether at all times or only so long as no
senior class of security has such voting power by reason of any contingency. 
 ARTICLE II 
 ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES 
 Section 2.01. Designation and Amount The Notes shall be designated as the “4.25% Senior Convertible Notes due 2014.” The
aggregate principal amount of Notes that may be authenticated and delivered under this Supplemental Indenture is initially limited to $100,000,000, subject to Section 2.07 and except for Notes authenticated and delivered upon registration or
transfer of, or in exchange for, or in lieu of other Notes pursuant to Section 2.06, Section 8.02 and Section 9.02 hereof and Section 306 of the Base Indenture. 
 Section 2.02. Form of Notes The Notes and the Trustee’s certificate of authentication to be borne by such Notes shall be
substantially in the form set forth in Exhibit A hereto. 
 Any of the Notes may have such letters, numbers or other marks of
identification and such notations, legends or endorsements as the officers executing the same may approve (execution thereof to be conclusive evidence of such approval) and as are not inconsistent with the provisions of this Supplemental Indenture,
or as may be required by the Depositary, as may be required to comply with any law or with any rule or regulation made pursuant thereto or with any rule or regulation of any securities exchange or automated quotation system on which the Notes may be
listed or designated for issuance, or to conform to usage or to indicate any special limitations or restrictions to which any particular Notes are subject. 
 A Global Note shall represent such principal amount of the Outstanding Notes as shall be specified therein and shall provide that it shall represent the aggregate principal amount of Outstanding Notes
from time to time endorsed thereon and that the aggregate principal amount of Outstanding Notes represented thereby may from time to time be increased or reduced to reflect repurchases, conversions, transfers or exchanges permitted hereby. Any
endorsement of a Global Note to reflect the amount of any increase or decrease in the amount of Outstanding Notes represented thereby shall be made by the Trustee or the Custodian, at the direction of the Trustee, in such manner and upon
instructions given by the Holder of such Notes in accordance with this Supplemental Indenture. Payment of principal and accrued and unpaid interest on a Global Note shall be made to the Holder of such Note on the date of payment, unless a Record
Date or other means of determining Holders eligible to receive payment is provided for herein. 
 The terms and provisions
contained in the form of Note attached as Exhibit A hereto are incorporated herein and shall constitute, and are hereby expressly made, a part of this Supplemental Indenture and to the extent applicable, the Company and the Trustee, by their
execution and delivery of this Supplemental Indenture, expressly agree to such terms and provisions and to be bound thereby. 
  

 8 

 Section 2.03. Date and Denomination of Notes; Payments of Interest The Notes shall be
issuable in registered form without coupons in denominations of $1,000 principal amount and integral multiples thereof. Each Note shall be dated the date of its authentication and shall bear interest from the date specified on the face of the form
of Note attached as Exhibit A hereto. Interest on the Notes shall be computed on the basis of a 360-day year comprised of twelve 30-day months. 
 The Person in whose name any Note (or its Predecessor Security) is registered on the Security Register at the Close of Business on any Record Date with respect to any Interest Payment Date shall be
entitled to receive the accrued and unpaid interest payable on such Interest Payment Date, subject to Section 4.01(b) hereof. Interest shall be payable at the office of the Company maintained by the Company for such purposes in the Borough of
Manhattan, City of New York, which shall initially be an office or agency of the Trustee. The Company shall pay interest (i) on any Notes in certificated form by check mailed to the address of the Person entitled thereto as it appears in the
Security Register (or upon written application by such Person to the Security Registrar not later than the relevant Record Date, by wire transfer in immediately available funds to such Person’s account within the United States, if such Person
is entitled to interest on an aggregate principal in excess of $2,000,000) or (ii) on any Global Note by wire transfer of immediately available funds to the account of the Depositary or its nominee. The term “Record Date” with
respect to any Interest Payment Date shall mean the June 1 or December 1 preceding the applicable June 15 or December 15 Interest Payment Date, respectively. 
 Section 2.04. Intentionally Omitted 
 Section 2.05. Intentionally Omitted 
 Section 2.06. Exchange and
Registration of Transfer of Notes; Restrictions on Transfer; Depositary 
 (a) Every Note (and all securities issued in
exchange therefor or in substitution thereof) that bears, or is required under this Section 2.06 to bear, the Restricted Note Legend (together with any Common Stock issued upon conversion of the Notes that bears, or is required under this
Section 2.06 to bear, the Restricted Common Stock Legend, collectively, the “Restricted Securities”) shall be subject to the restrictions on transfer set forth in this Section 2.06 (including those set forth in the
Restricted Note Legend and the Restricted Common Stock Legend, as applicable), unless such restrictions on transfer shall be waived by written consent of the Company following receipt of legal advice, satisfactory to the Company in its sole
discretion, supporting the permissibility of the waiver of such transfer restrictions, and the Holder of each such Note or shareholder of such Common Stock, as applicable, by such Holder’s or shareholder’s acceptance thereof, agrees to be
bound by all such restrictions on transfer. As used in this Section 2.06, the term “transfer” means any sale, pledge, loan, transfer or other disposition whatsoever of any Restricted Security or any interest therein. 
  

 9 

 (b) Until the date that is one year after the last date of the original issuance of the
Notes or such later date, if any, as may be required by applicable laws (such applicable date, the “Resale Restriction Termination Date”): (i) each certificate evidencing a Note shall bear the Restricted Note Legend and
(ii) each certificate evidencing shares of Common Stock issued upon conversion of the Notes shall bear the Restricted Common Stock Legend; unless such Restricted Security has been sold pursuant to a registration statement that has been declared
effective under the Securities Act (and which continues to be effective at the time of such transfer) or sold pursuant to Rule 144, or unless otherwise agreed by the Company in writing as set forth above, with written notice thereof to the Trustee.

 (c) In connection with any transfer of the Notes prior to the Resale Restriction Termination Date, the holder must complete
and deliver the Form of Assignment and Transfer attached hereto as Exhibit D, with the appropriate box checked, to the Trustee (or any successor Trustee, as applicable). 
 (d) Any Notes that are Outstanding following the Resale Restriction Termination Date and any Notes as to which the conditions for the removal of the Restricted Note Legend set forth thereon have been
satisfied may, upon surrender of such Notes to the Security Registrar for exchange in accordance with the provisions of this Section 2.06, be exchanged for a new Note or Notes, of like tenor and aggregate principal amount, which shall not bear
the Restricted Note Legend. If such Note surrendered for exchange is represented by a Global Note bearing the Restricted Note Legend (the “Restricted Global Note”), then the principal amount of the Restricted Global Note shall be
reduced by the appropriate principal amount and the principal amount of the Global Note without a Restricted Note Legend (the “Unrestricted Global Note”) shall be increased by an equal principal amount. If the Unrestricted Global
Note is not then Outstanding, the Company shall promptly execute and the Trustee shall authenticate and deliver the Unrestricted Global Note to the Depositary. 
 Prior to the Resale Restriction Termination Date, any Notes purchased or owned by the Company or any Subsidiary thereof may not be resold by the Company or such Subsidiary unless registered under the
Securities Act or resold pursuant to an exemption from the registration requirements of the Securities Act in a transaction which results in such Notes no longer being “restricted securities” (as defined under Rule 144). 
 (e) The Trustee shall have no obligation or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed
under this instrument or under applicable law with respect to any transfer of any interest in any Note other than to require delivery of such certificates and other documentation or evidence as are expressly required by, and to do so if and when
expressly required by, the terms of this instrument, and to examine the same to determine substantial compliance as to form with the express requirements hereof. 
 (f) So long as the Notes are eligible for book-entry settlement with the Depositary, unless otherwise required by law, all Notes shall be represented by one or more Notes in global form (each, a
“Global Note”) registered in the name of the Depositary or the nominee of the Depositary. The transfer and exchange of beneficial interests in a Global Note, which does not involve the issuance of a definitive Note, shall be
effected through the Depositary (but not the Trustee or the Custodian) in accordance with this Supplemental Indenture (including the restrictions on transfer set forth herein) and the procedures of the Depositary therefor. 
  

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 Section 2.07. Additional Notes; Repurchases The Company may, without the consent of
the Noteholders and notwithstanding Section 2.01, increase the principal amount of the Notes by issuing additional Notes (“Additional Notes”) of the same series as the Initial Notes in the future in an unlimited aggregate
principal amount on the same terms and conditions, except for any differences in the issue price and interest accrued prior to the issue date of the Additional Notes and, at the option of the Company, the first payment of interest following the
issue date of such Additional Notes; provided that such differences do not cause the Additional Notes to constitute a different class of securities than the Notes for U.S. federal income tax purposes; provided further, that the
Additional Notes have the same CUSIP number as the Initial Notes; and provided further, however, that the Additional Notes may have a different CUSIP number on a temporary basis if necessary to comply with applicable U.S. securities laws. The
Notes and any Additional Notes shall rank equally and ratably and shall be treated as a single class for all purposes under the Base Indenture and this Supplemental Indenture including, without limitation, for purposes of any waivers, supplements or
amendments to the Indenture requiring the approval of Holders of the Notes and any offers to purchase the Notes. All provisions of the Indenture shall be construed and interpreted to permit the issuance of such Additional Notes and to allow such
Additional Notes to become fungible and interchangeable with the Initial Notes issued under the Indenture. No Additional Notes may be issued if an Event of Default has occurred with respect to the Notes and is continuing. 
 Section 2.08. No Sinking Fund The provisions of Article Twelve of the Base Indenture shall not be applicable to the Notes. No sinking
fund is provided for the Notes. 
 Section 2.09. Ranking The Notes constitute a senior general unsecured obligation of
the Company, ranking equally in right of payment with all of the existing and future senior indebtedness of the Company and ranking senior in right of payment to any future indebtedness of the Company that is expressly made subordinate to the Notes
by the terms of such indebtedness. 
 Section 2.10. Automatic Exchange from Restricted Global Note to Unrestricted Global
Note 
 Beneficial interests in the Restricted Global Note held by Persons other than “affiliates” (as defined
under Rule 144) of the Company, and Persons who have been “affiliates” (as defined under Rule 144) of the Company during the immediately preceding three months, shall be automatically exchanged into beneficial interests in the Unrestricted
Global Note, without any action required by or on behalf of such Holders (the “Automatic Exchange”), as provided in this Section 2.10. In order to effect the Automatic Exchange, the Company shall cause the Trustee, as provided
in this Section 2.10, at least 15 days but not more than 30 days prior to the Resale Restriction Termination Date, to deliver a notice of Automatic Exchange (an “Automatic Exchange Notice”) to each such Holder at such
Holder’s address appearing in the Security Register. The Automatic Exchange Notice shall identify the Notes subject to the Automatic Exchange and shall state: (1) the date of the Automatic Exchange; (2) the section of this Indenture
pursuant to which the Automatic Exchange shall occur; (3) the “CUSIP” number of the Restricted Global Note from which such Holder’s beneficial interests shall be transferred and (4) the “CUSIP” number of the
Unrestricted Global Note into which such Holder’s beneficial interests shall be transferred. 
  

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 At the Company’s request on not less than 5 days’ prior notice, the Trustee shall
deliver in the Company’s name and at its expense, the Automatic Exchange Notice to each such Holder at such Holder’s address appearing in the Security Register; provided, however, that the Company shall have delivered to the
Trustee a written order of the Company and an Officers’ Certificate requesting that the Trustee give the Automatic Exchange Notice (in the name and at the expense of the Company) and setting forth the information to be stated in the Automatic
Exchange Notice. As a condition to the Automatic Exchange, the Trustee shall be entitled to receive from the Company, and rely conclusively without any liability, upon an Officers’ Certificate and an Opinion of Counsel to the Company, if
requested at least 2 Business Days prior to the deadline for the Trustee’s delivery of the Automatic Exchange Notice as provided in this Section 2.10, in form and in substance reasonably satisfactory to the Trustee, to the effect that such
transfer of beneficial interests to the Unrestricted Global Note shall be effected in compliance with the Securities Act. If the Trustee requests an Officer’s Certificate and/or Opinion of Counsel to the Company pursuant to the immediately
preceding sentence, the Company may, promptly upon such request and in no event later than two Business Days after receipt of such request, request that the Trustee deliver, together with the Automatic Exchange Notice, to each Holder the Company
reasonably determines might be an “affiliate” (as defined under Rule 144) of the Company or was an “affiliate” (as defined under Rule 144) of the Company during the immediately preceding three months or otherwise might not be
permitted under applicable law to receive unrestricted securities pursuant to the provisions set forth in this Section 2.10, a statement that such Holder must return prior to any exchange of such Holder’s beneficial interests in the
Restricted Global Note pursuant to this Section 2.10, confirming that such Holder is and was not and an “affiliate” (as defined under Rule 144) of the Company at such time and is otherwise permitted to exchange its beneficial
interests in the Restricted Global Note for beneficial interests in the Unrestricted Global Note in accordance with applicable laws. 
 Upon such exchange of beneficial interests pursuant to this Section 2.10, the Registrar shall reflect on its books and records the date of such transfer and a decrease and increase, respectively, in the principal amount of the
applicable Restricted Global Note(s) and the Unrestricted Global Note, respectively, equal to the principal amount of beneficial interests transferred. If an Unrestricted Global Note is not then Outstanding at the time of the Automatic Exchange, the
Company shall execute and the Trustee shall authenticate and deliver an Unrestricted Global Note to the Depositary. Following the transfer of all beneficial interests in the Restricted Global Note to the Unrestricted Global Note, the Restricted
Global Note shall be cancelled. 
 In the event the Holder of a Note receives, upon conversion of its beneficial interests in
the Restricted Global Note, Common Stock that bears the Restricted Common Stock Legend (the “Restricted Common Stock”), such Holder shall have the right to offer, resell, pledge or otherwise transfer such Restricted Common Stock in
compliance with applicable law, including pursuant to Rule 144, and the transferee shall have the right to receive Common Stock that is no longer subject to such restrictions (including removal of the Restricted Common Stock Legend), subject to
compliance with applicable law and the Company’s and the Trustee’s right prior to any such transfer to require the delivery of an opinion of counsel, certification and/or other information satisfactory to each of them that such exemption
is available to the Holder. 
  

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 ARTICLE III 
 REDEMPTION 
 Section 3.01. No Right to Redeem
The provisions of Article Eleven of the Base Indenture shall not be applicable to the Notes. The Notes shall not be redeemable before their Stated Maturity at the option of the Company. 
 ARTICLE IV 
 PARTICULAR COVENANTS OF THE COMPANY

 Section 4.01. Payment of Principal and Interest 
 (a) Section 307, Section 1001 and Section 1003 of the Base Indenture shall apply to the Notes, subject to Section 8.03
hereof; provided, however, that, with respect to any Noteholder with an aggregate principal amount in excess of $2,000,000, at the application of such Holder in writing to the Security Registrar not later than the relevant Record Date,
accrued and unpaid interest on such Holder’s Notes shall be paid on the corresponding Interest Payment Date by wire transfer in immediately available funds to such Holder’s account in the United States supplied by such Holder from time to
time to the Trustee and Paying Agent (if different from Trustee); provided further that payment of accrued and unpaid interest made to the Depositary shall be paid by wire transfer in immediately available funds in accordance with such wire
transfer instructions and other procedures provided by the Depositary from time to time. 
 (b) Except as otherwise provided in
this Section 4.01, a Holder of any Notes at 5:00 p.m. New York City time, on a Record Date shall be entitled to receive interest on such Notes on the corresponding Interest Payment Date. A Holder of any Notes as of a Record Date that are
converted after 5:00 p.m. New York City time on such Record Date and prior to the Opening of Business on the corresponding Interest Payment Date shall be entitled to receive accrued and unpaid interest on the principal amount of such Notes,
notwithstanding the conversion of such Notes prior to such Interest Payment Date. However, a Holder that surrenders any Notes for conversion after 5:00 p.m. New York City time on a Record Date and prior to the Opening of Business on the
corresponding Interest Payment Date shall be required to pay the Company an amount equal to the accrued and unpaid interest payable by the Company with respect to such Notes on such Interest Payment Date at the time such Holder surrenders such Notes
for conversion, provided, however, that this sentence shall not apply to a Holder that converts Notes: 
 (i) to the extent of any overdue interest, if any overdue interest exists at the time of conversion with respect to such Notes; 
 (ii) in connection with a Fundamental Change in which the Company has specified a Fundamental Change Repurchase Date that is after a Record Date and on or prior to the next Interest Payment Date; or

  

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 (iii) after 5:00 p.m., New York City time on the Record Date immediately
preceding the Maturity Date. 
 Accordingly, a Holder that converts Notes under any of the circumstances described in clauses (i), (ii) or
(iii) above will not be required to pay to the Company an amount equal to the accrued and unpaid interest payable by the Company with respect to such Notes on the relevant Interest Payment Date. 
 (c) Notwithstanding anything to the contrary in the Indenture, the Company may pay accrued and unpaid interest (including Additional
Interest and Filing Additional Interest, if any) to a Person other than the Holder of record on the Record Date immediately prior to the Maturity Date. On the Maturity Date, the Company shall pay accrued and unpaid interest only to the Person to
whom the Company pays the principal amount of the Notes. 
 Section 4.02. Maintenance of Office or Agency for Conversion
Agent If at any time the Conversion Agent is not the Trustee or an office or agency designated or appointed by the Trustee, the Company will give prompt written notice to the Trustee of the location of such Conversion Agent. If at any time the
Company shall fail to maintain an office or agency for the Conversion Agent, presentations, surrenders, notices and demands related to conversions of Notes may be made or served at the Corporate Trust Office or the office or agency of the Trustee in
the Borough of Manhattan, the City of New York. 
 Section 4.03. Reports by Company; 144A Information The provisions of
Section 1005 of the Base Indenture shall not be applicable to the Notes. 
 (b) The Company shall deliver to the Trustee
copies of the annual reports and of the information, documents and other reports (or copies of such portions of any of the foregoing as the Commission may by rules and regulations prescribe) that it is required to file with the Commission pursuant
to Section 13 or 15(d) of the Exchange Act with the Trustee within 15 days after the Company is required to file such reports, information and documents with the Commission. All required reports, information and documents referred to in this
Section 4.03(b) shall be deemed to be delivered to the Trustee at the time such reports, information and documents are publicly filed with the Commission via the Commission’s EDGAR and/or IDEA filing system (or any successor system).

 (c) The Company covenants and agrees that it shall, during any period in which it is not subject to Section 13 or 15(d)
under the Exchange Act, make available to any Holder or beneficial holder of Notes or any holder of Common Stock issued upon conversion thereof which continue to be Restricted Securities and any prospective purchaser of Notes or such Common Stock
designated by such Holder or beneficial holder, the information, if any, required pursuant to Rule 144A(d)(4) under the Securities Act upon the request of any such Holder or beneficial holder of the Notes or such Common Stock, until such time as
such securities are no longer “restricted securities” within the meaning of Rule 144, assuming such Notes have not been owned or beneficially owned by an “affiliate” (as defined in Rule 144) of the Company. 
  

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 (d) Delivery of such reports, information and documents to the Trustee is for informational
purposes only, and the Trustee’s receipt of such shall not constitute constructive notice of any information contained therein or determinable from information contained therein, including the Company’s compliance with any of its covenants
hereunder (as to which the Trustee is entitled to conclusively rely exclusively on an Officers’ Certificate). Notwithstanding anything to the contrary in this Section 4.03, the Company, to the extent permitted under the Trust Indenture
Act, shall not be required to deliver to the Trustee or the Holders any material for which the Company has sought and received confidential treatment by the Commission. 
 Section 4.04. Subsidiary Guarantors 
 (a) The Company shall cause each
Wholly Owned Domestic Subsidiary that guarantees any unsecured indebtedness of the Company (“Guaranteed Indebtedness”) to, within 10 Business Days of becoming a guarantor of such Guaranteed Indebtedness (a) execute and deliver
a supplemental indenture to the Base Indenture providing for a Guarantee of payment of the Notes by such Wholly Owned Domestic Subsidiary, and (b) waive, and not in any manner whatsoever claim or take the benefit or advantage of, any rights of
reimbursement, indemnity or subrogation or any other rights against the Company or any other Subsidiary as a result of any payment by such Subsidiary under its Guarantee until the Notes have been paid in full. 
 (b) After the execution of a supplemental indenture pursuant to this Section 4.04, such new Wholly Owned Domestic Subsidiary party
thereto shall be a Guarantor of the Notes for all purposes of this Indenture. 
 (c) If the Guaranteed Indebtedness is
(A) pari passu in right of payment with the Notes or any Guarantee, then the guarantee of such Guaranteed Indebtedness shall be pari passu in right of payment with, or subordinated to, the Guarantee of the Notes or
(B) subordinated in right of payment to the Notes or any Guarantee, then the guarantee of such Guaranteed Indebtedness shall be subordinated in right of payment to the Guarantee of the Notes at least to the extent that the Guaranteed
Indebtedness is subordinated to the Notes or the Guarantee. 
 (d) Notwithstanding the foregoing, any Guarantee of the Notes
pursuant to this Section 4.04 shall be automatically and unconditionally released and discharged in accordance with Section 11.05 hereof. 
 Section 4.05. Exclusion of Certain Provisions From Base Indenture Article Fourteen of the Base Indenture shall not apply to the Notes. 
  

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 ARTICLE V 
 DEFAULTS AND REMEDIES 
 Section 5.01. Events of
Default The provisions of Section 501(1), Section 501(2), Section 501(3) and 501(5) of the Base Indenture shall not be applicable to the Notes. As contemplated under Section 301 and Section 501(9) of the Base Indenture,
the following events, in addition to the events described in clauses (4), (6), (7) and (8) of the Base Indenture, shall be Events of Default with respect to the Notes: 
 (a) failure by the Company to pay any interest (including Additional Interest and Filing Additional Interest, if any) on the
Notes when due and such failure continues for a period of 30 calendar days; 
 (b) failure by the Company to pay
principal of the Notes when due at the Maturity Date, or failure by the Company to pay the repurchase price payable, in respect of any Notes when due; 
 (c) failure by the Company to deliver shares of Common Stock upon the conversion of any Notes and such failure continues for five calendar days following the scheduled settlement date for such conversion;

 (d) failure by the Company for a period of five calendar days to issue a Fundamental Change Company Notice in
accordance with Section 9.02 when due; 
 (e) any Guarantee provided by any Significant Subsidiary shall be
held in any judicial proceeding to be unenforceable or invalid or shall cease for any reason to be in full force and effect or any Guarantor, or any person acting on behalf of any Guarantor, shall deny or disaffirm its obligations under any
Guarantee; and 
 (f) a failure to pay when due (whether at stated maturity or otherwise) or a default that
results in the acceleration of maturity, of any indebtedness for borrowed money of the Company or any of its Significant Subsidiaries in an aggregate amount in excess of $20,000,000 (or its foreign currency equivalent), unless such indebtedness is
discharged, or such acceleration is rescinded, stayed or annulled, within a period of 30 calendar days after written notice of such failure is given to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in
aggregate principal amount of the Notes then Outstanding. 
 The Company shall be required to notify the Trustee within five
(5) Business Days of it becoming aware of the occurrence of any default under the Indenture with respect to the Notes. 
 Section 5.02. Filing Failure; Additional Interest 
 (a) Notwithstanding anything to the contrary in the
Indenture, the failure by the Company to comply with Section 4.03, and for any failure to comply with the requirements of Section 314(a)(1) of the Trust Indenture Act (each, a “Filing Failure”), will not constitute an
Event of Default for the 365 days after the occurrence of such Filing Failure provided the Company pays additional

  

 16 

 
interest on the Notes (“Filing Additional Interest”) at an annual rate equal to 0.50% of the principal amount of the Notes. In the event the Company does not elect to pay the
Filing Additional Interest upon a Filing Failure in accordance with this Section 5.02, such Filing Failure will constitute an Event of Default under the Indenture and the Notes will be subject to acceleration in accordance with Section 502
of the Base Indenture. The Filing Additional Interest will accrue on all Outstanding Notes from and including the date on which a Filing Failure first occurs to but not including the 365th day thereafter (or such earlier date on which the Filing
Failure shall have been cured or waived). On such 365th day, the Notes will be subject to acceleration in accordance with Section 502 of the Base Indenture if the Filing Failure is continuing. 
 (b) For the avoidance of doubt, this Section 5.02 will not affect the rights of Holders of Notes in the event of the occurrence of any
other Event of Default. 
 Section 5.03. Waiver of Past Defaults 
 Section 513 of the Base Indenture is deleted in its entirety and replaced with the following: 
 The Holders of not less than a majority in principal amount of the Notes Outstanding may, on behalf of the Holders of all the Notes, consent
to the waiver of any past default or Event of Default under the Indenture and its consequences, except: 
  

	 	(1)	failure by the Company to pay principal of or interest (including Additional Interest or Filing Additional Interest, if any) on the Notes when due;

  

	 	(2)	failure by the Company to deliver shares of Common Stock upon the conversion of any Notes; 

  

	 	(3)	failure by the Company to pay the Fundamental Change Repurchase Price on the Fundamental Change Repurchase Date in connection with a Holder of Notes exercising its
repurchase rights in accordance with the Indenture; or 

  

	 	(4)	failure of the Company to comply with a covenant or provision of the Indenture which under Article Nine cannot be modified or amended without the consent of the Holder
of each Outstanding Security of such series affected. 

 Upon any such waiver, such default shall cease to exist,
and any Event of Default arising therefrom shall be deemed to have been cured, for every purpose of this Indenture and the Notes; but no such waiver shall extend to any subsequent or other default or Event of Default or impair any right consequent
thereon. 
 Section 5.04. Article Five of Base Indenture Except as amended, supplemented or modified by Sections 5.01 and
5.03 hereof, all of the provisions of Article Five of the Base Indenture shall be applicable to the Notes. 
  

 17 

 Section 5.05. Restricted Securities; Additional Interest 
 (a) If, at any time during the six-month period beginning on, and including, the date which is six months after the date hereof (the
“Additional Interest Period”), the Company fails to timely file any document or report that the Company is required to file with the SEC pursuant to Section 13 or 15(d) of the Exchange Act, other than current reports on Form
8-K (after giving effect to all applicable grace periods thereunder), the Company shall (i) pay additional interest (“Additional Interest”) on the Notes which shall accrue on the Notes at a rate of 0.50% per annum of the
principal amount of Notes Outstanding for each day during the Additional Interest Period for which the Company’s failure to file, as described above, has occurred and is continuing and (ii) for so long as the Restricted Note Legend has not
been removed in accordance with Section 2.06 or 2.10, notify the Trustee of such late filing promptly, but not later than three Business Days after such failure to timely file. 
 (b) Additional Interest payable in accordance with Sections 5.05(a) shall be payable in arrears on each Interest Payment Date for the Notes
following accrual in the same manner as regular interest on the Notes. 
 (c) Notwithstanding anything to the contrary contained
in this Section 5.05, no Additional Interest shall accrue following the end of the Additional Interest Period even though any failure to file as described in Section 5.05(a) has occurred or is continuing. 
 ARTICLE VI 
 SUPPLEMENTAL INDENTURES 
 Section 6.01. Supplemental Indentures Without Consent of Noteholders

 (a) Without the consent of any Holders of the Notes, the Company, when authorized by or pursuant to a Board Resolution, and
the Trustee, at any time and from time to time, may enter into one or more indentures supplemental to the Indenture, in form satisfactory to the Trustee, for any of the following purposes: 
  

	 	(1)	the purposes set forth in Clauses (1) through (9) and (11) to (13) of Section 901 of the Base Indenture; 

  

	 	(2)	to provide for conversion rights of Holders of Notes and the Company’s repurchase obligations in connection with a Fundamental Change in the event of any
reclassification of the Common Stock, merger or consolidation, or sale, conveyance, transfer or lease of the Company’s property and assets substantially as an entirety; 

  

	 	(3)	to conform the provisions of the Indenture to the “Description of Notes” section contained in the Company’s private placement memorandum related to the
Notes dated November 4, 2009; and 

  

	 	(4)	to increase the Conversion Rate. 

  

 18 

 (b) Solely with respect to the Notes, clause 901(10) of the Base Indenture is hereby deleted
in its entirety and replaced with the following: 
 “(10) to (a) cure any ambiguity or correct or supplement any
inconsistent or otherwise defective provision contained in the Indenture or (b) make any provision with respect to matters or questions arising under this Indenture that the Company may deem necessary or desirable and that shall not be
inconsistent with provisions of the Indenture.” 
 Section 6.02. Modification and Amendment with Consent of
Noteholders 
 Section 902 of the Base Indenture shall be applicable to the Notes. In addition, as contemplated by
Sections 301 and 902 of the Base Indenture, no supplemental indenture shall, without the consent of the Holder of each Outstanding Note affected thereby: 
 (a) make any change that affects the right of any Holder to convert Notes into shares of the Company’s Common Stock or reduce the number of shares of Common Stock receivable upon conversion pursuant
to the terms of the Indenture; 
 (b) change the Company’s obligation to repurchase any Notes upon a
Fundamental Change in a manner adverse to the Holders after the occurrence of a Fundamental Change. 
 Section 6.03. Effect
of Supplemental Indentures Upon the execution of any supplemental indenture under this Article, the Base Indenture and this Supplemental Indenture shall be modified in accordance therewith, and such supplemental indenture shall form a part of
the Indenture for all purposes; and every Holder of Notes theretofore or thereafter authenticated and delivered hereunder and of any coupon appertaining thereto shall be bound thereby. 
 Section 6.04. Article Nine of Base Indenture Except as amended by this Article VI, all of the provisions of Article Nine of the Base
Indenture shall be applicable to the Notes. 
 ARTICLE VII 
 CONSOLIDATION, MERGER, SALE, LEASE OR CONVEYANCE 
 Section 7.01. Consolidation, Merger and Sale of Assets. 
 Section 801 of the Base Indenture is deleted in
its entirety and replaced with the following: 
 Section 801. Consolidation, Merger and Sale of Assets. The Company will
not, in a single transaction or a series of related transactions, consolidate with or merge with or into any other Person, or sell, convey, transfer or lease its property and assets substantially as an entirety to another Person, unless: 

 

	 	(1)	either (a) the Company shall be the continuing corporation or (b) the resulting, surviving or transferee person (if other than the Company) shall be a
corporation or limited liability company organized and existing under the laws of the United States of America, any State thereof or the District of Columbia (the “Successor Company”), and such Successor Company shall expressly
assume, by an indenture supplemental to the Indenture in a form reasonably satisfactory to the Trustee, executed and delivered to the Trustee, and a supplemental agreement, all the obligations of the Company under the Notes and the Indenture;

  

 19 

	 	(2)	immediately after giving effect to such transaction, no default or Event of Default has occurred and is continuing; 

  

	 	(3)	if as a result of such transaction the Notes become convertible into common stock or other securities issued by a third party, such third party fully and
unconditionally guarantees all obligations of the Company or the Successor Company, as the case may be, under the Notes and the Indenture; and 

  

	 	(4)	the Company shall have delivered to the Trustee any Officers’ Certificate and Opinion of Counsel required by Section 803 of the Base Indenture.

 ARTICLE VIII 
 CONVERSION OF NOTES 
 Section 8.01. Conversion Privilege 

(a) Upon compliance with the provisions of this Article VIII, a Holder of Notes shall have the right, at such Holder’s option, to
convert all or any portion (if the portion to be converted is $1,000 principal amount or an integral multiple thereof) of such Note at any time prior to the Close of Business on the scheduled Business Day immediately preceding the Maturity Date at a
rate (the “Conversion Rate”) of 64.6162 shares of Common Stock (subject to adjustment by the Company as provided in Section 8.04) per $1,000 principal amount of Notes (the “Conversion Obligation”).

 (b) (1) If and only to the extent a Noteholder elects to convert Notes prior to the Maturity Date in connection with a
transaction described in clause (a) or (d) of the definition of Fundamental Change pursuant to which 10% or more of the consideration for the Common Stock (other than cash payments for fractional shares and cash payments made in respect of
dissenters’ appraisal rights) in such transaction consists of cash or securities (or other property) that are not shares of common stock traded or scheduled to be traded immediately following such transaction on a U.S. national securities
exchange, then the Conversion Rate applicable to each $1,000 principal amount of Notes so converted shall be increased by an additional number of shares of Common Stock (the “Additional Shares”) as described below. The Company shall
notify Holders of the anticipated effective date of a Fundamental Change meeting the conditions of this Section 8.01(b) at least 20 calendar days prior to the anticipated effective date of such

  

 20 

 
Fundamental Change. Settlement of Notes tendered for conversion to which Additional Shares shall be added to the Conversion Rate as provided in this subsection shall be settled pursuant to
Section 8.02 below, as applicable. For purposes of this Section 8.01(b), a conversion of Notes shall be deemed to be “in connection with” a Fundamental Change to the extent that the related conversion notice is received by the
Conversion Agent following the effective date of the Fundamental Change but before the Close of Business on the Business Day immediately preceding the related Fundamental Change Repurchase Date. Such conversion notice shall indicate that the Holder
of Notes has elected to convert Notes in connection with a Fundamental Change; provided, however, that the failure to so indicate shall not in any way affect the Conversion Obligation or the right of such Holder to receive Additional
Shares in connection with such conversion. 
 (2) The number of Additional Shares by which the Conversion Rate will be increased
shall be determined by reference to the table attached as Schedule A hereto, based on the date on which the Fundamental Change occurs or becomes effective (the “Effective Date”), and the Stock Price; provided, that if the
Stock Price is between two Stock Price amounts in the table attached as Schedule A hereto or the Effective Date is between two Effective Dates in the table attached as Schedule A hereto, the number of Additional Shares shall be determined by a
straight-line interpolation between the number of Additional Shares set forth for the higher and lower Stock Price amounts and the two dates, as applicable, based on a 360-day year; provided further that if (x) the Stock Price is in
excess of $125.00 per share of Common Stock (subject to adjustment in the same manner as set forth in Section 8.04), no Additional Shares will be added to the Conversion Rate, and (y) the Stock Price is less than $11.68 per share of Common
Stock (subject to adjustment in the same manner as set forth in Section 8.04), no Additional Shares will be added to the Conversion Rate. Notwithstanding the foregoing, in no event will the total number of shares of Common Stock issuable upon
conversion exceed 85.6164 per $1,000 principal amount of Notes (subject to adjustment in the same manner as set forth in Section 8.04). 
 The number of Additional Shares within the table in Schedule A hereto shall be adjusted in the same manner as and as of any date on which the Conversion Rate of the Notes is adjusted as set forth in
Section 8.04 (other than by operation of an adjustment to the Conversion Rate by adding Additional Shares). The Stock Prices set forth in the first row of the table attached as Schedule A hereto (i.e., the column headers) shall be
simultaneously adjusted as of any date on which the Conversion Rate of the Notes is adjusted. The adjusted Stock Prices shall equal the Stock Prices applicable immediately prior to such adjustment, multiplied by a fraction, the numerator of which is
the Conversion Rate in effect immediately prior to the adjustment giving rise to the Stock Price adjustment and the denominator of which is the Conversion Rate as so adjusted. 
 Section 8.02. Conversion Procedures 
 (a) Each Security shall be convertible at the office of the Conversion Agent and, if applicable, in accordance with the procedures of the Depositary. 
 (b) In order to exercise the conversion privilege with respect to any interest in a Global Note, the Holder must complete the appropriate
instruction form for conversion pursuant to the Depositary’s book-entry conversion program, furnish appropriate

  

 21 

 
endorsements and transfer documents if required by the Company or the Conversion Agent, pay the funds, if any, required by Section 4.01(b) and all taxes or duties, if any, for which the
Holder is responsible pursuant to Section 1605 of the Base Indenture, and the Conversion Agent must be informed of the conversion in accordance with the customary practice of the Depositary. In order to exercise the conversion privilege with
respect to any certificated Notes, the Holder of any such Notes to be converted, in whole or in part, shall: 
 (i) complete and manually sign the conversion notice provided on the back of the Note and attached hereto as Exhibit B (the “Conversion Notice”) or a facsimile of the Conversion Notice; 
 (ii) deliver the completed Conversion Notice, which is irrevocable, and the Note to the Conversion Agent; 
 (iii) if required, furnish appropriate endorsements and transfer documents; 
 (iv) if required, pay the funds required by Section 4.01(b); and 
 (v) if required, pay all taxes or duties pursuant to Section 1605 of the Base Indenture. 
 The date on which the Holder satisfies all of the applicable requirements set forth in this Section 8.02(b) is the “Conversion
Date.” The Conversion Agent will, as promptly as possible, and in any event within two (2) Business Days of the receipt thereof, provide the Company with notice of any conversion by a Holder of the Securities. 
 (c) Each Conversion Notice shall state the name or names (with address or addresses) in which any certificate or certificates for shares of
Common Stock which shall be issuable upon such conversion shall be issued. All such Notes surrendered for conversion shall, unless the shares of Common Stock issuable upon conversion are to be issued in the same name as the registration of such
Notes, be duly endorsed by, or be accompanied by instruments of transfer in form satisfactory to the Company duly executed by, the Holder or his duly authorized attorney. 
 (d) In case any Notes of a denomination greater than $1,000 shall be surrendered for partial conversion, the Company shall execute and the Trustee shall authenticate and deliver to the Holder of the Notes
so surrendered, without charge, new Notes in authorized denominations in an aggregate principal amount equal to the unconverted portion of the surrendered Notes. 
 Each conversion shall be deemed to have been effected as to any such Notes (or portion thereof) surrendered for conversion immediately prior to the Close of Business on the relevant Conversion Date. The
person in whose name the certificate or certificates for the number of shares of Common Stock that shall be issuable upon such conversion shall become the holder of record of such shares of Common Stock as of the Close of Business on such Conversion
Date. Notwithstanding the foregoing and anything contained in this Supplemental Indenture to the contrary, in no event shall a Holder be entitled to the benefit of a Conversion Rate

  

 22 

 
adjustment pursuant to the provisions of Article VIII hereof in respect of Notes surrendered for conversion if, by virtue of being deemed the record holder of the shares of Common Stock issuable
upon such conversion pursuant to the foregoing sentence, such Holder participates, as a result of being such holder of record, in the transaction or event that would otherwise give rise to such Conversion Rate adjustment to the same extent and in
the same manner as holders of shares of Common Stock generally. 
 (e) Upon the conversion of an interest in Global Notes, the
Trustee (or other Conversion Agent appointed by the Company) shall make a notation on such Global Notes as to the reduction in the principal amount represented thereby. The Company shall notify the Trustee in writing of any conversions of Securities
effected through any Conversion Agent other than the Trustee. 
 (f) Notwithstanding the foregoing, a Note in respect of which a
Holder has delivered a Fundamental Change Repurchase Notice exercising such Holder’s option to require the Company to purchase such Note may be converted only if such Fundamental Change Repurchase Notice is withdrawn in accordance with Article
IX hereof prior to the Close of Business on the Fundamental Change Purchase Date. 
 Section 8.03. Payments Upon
Conversion 
 (a) Upon any conversion of any Notes, on the third Business Day immediately following the Conversion Date, the
Company shall deliver to the converting Holder a number of shares of Common Stock equal to (i) the aggregate principal amount of such Notes to be converted divided by $1,000, multiplied by (ii) the Conversion Rate in effect as of such
Conversion Date, together with any cash payment for any fractional share of Common Stock as described in this Section 8.03. 
 (b) [RESERVED] 
 (c) Notwithstanding anything to the contrary in the Indenture, upon the conversion of any Notes, the
Holder will not be entitled to receive any separate cash payment for accrued and unpaid interest (including Additional Interest and Filing Additional Interest), if any, except to the extent specified in Section 4.01. The Company’s delivery
to the Holder of Common Stock together with any cash payment for any fractional share of Common Stock into which a Note is convertible will be deemed to satisfy in full the Company’s obligation to pay the principal amount of the Notes so
converted and accrued and unpaid interest (including Additional Interest and Filing Additional Interest), if any, to, but not including, the Conversion Date. As a result, accrued and unpaid interest (including Additional Interest and Filing
Additional Interest), if any, to, but not including, the Conversion Date will be deemed to be paid in full rather than cancelled, extinguished or forfeited. 
 (d) The Company shall not issue fractional shares of Common Stock upon conversion of Notes. If multiple Notes shall be surrendered for conversion at one time by the same Holder, the number of full shares
which shall be issuable upon conversion shall be computed on the basis of the aggregate principal amount of the Notes (or specified portions thereof to the extent permitted hereby) so

  

 23 

 
surrendered. If any fractional share of Common Stock would be issuable upon the conversion of any Notes, the Company shall make payment therefor in cash in lieu of fractional shares of Common
Stock based on the Last Reported Sale Price on the relevant Conversion Date. 
 Section 8.04. Adjustment of Conversion
Rate The Conversion Rate shall be adjusted from time to time by the Company as follows: 
 (a) If the Company
issues shares of Common Stock as a dividend or distribution on shares of Common Stock, or effects a share split or share combination, then the Conversion Rate shall be adjusted based on the following formula: 
  

													
		 	 CR’
	 	=	 	CR0	 	x	 	 OS’
	  	
		 	 	 	 	 	OS0	  	

  

					
	where
			
	 CR’
	 	=	  	the Conversion Rate in effect immediately prior to the Opening of Business on the record date for such dividend or distribution or the effective date of such share split or
combination, as the case may be;
			
	 CR0
	 	=	  	the Conversion Rate in effect at 5:00 p.m., New York City time, on the Trading Day immediately preceding the record date for such dividend or distribution or the effective date of
such share split or combination, as the case may be;
			
	 OS0
	 	=	  	the number of shares of Common Stock outstanding at 5:00 p.m., New York City time, on the Trading Day immediately preceding the Ex-Dividend Date for such dividend or distribution or
the effective date of such share split or combination; and
			
	 OS’
	 	=	  	the number of shares of Common Stock that would be outstanding immediately after giving effect to such dividend, distribution, share split or combination, as the case may
be.

 Such adjustment shall become effective immediately prior to the Opening of Business on the record
date for such dividend or distribution or the effective date of such share split or combination, as the case may be. If any dividend or distribution of the type described in this Section 8.04(a) is declared but not so paid or made, or the
outstanding shares of Common Stock are not subdivided or combined, as the case may be, the Conversion Rate shall be immediately readjusted, effective as of the date the Board of Directors determines not to pay such dividend or distribution, or
subdivide or combine the outstanding shares of Common Stock, as the case may be, to the Conversion Rate that would then be in effect if such dividend, distribution, subdivision or combination had not been declared. 
  

 24 

 (b) In case the Company shall issue to all or substantially all holders of its Common Stock
any rights or warrants (other than rights issued pursuant to a shareholders’ rights plan) entitling them for a period of not more than 45 days from the issuance date for such distribution to subscribe for or purchase shares of Common Stock, at
a price per share less than the Last Reported Sale Price of the Common Stock on the Trading Day immediately preceding the declaration date of such distribution, then the Conversion Rate shall be adjusted based on the following formula: 

 

													
		 	 CR’
	 	=	 	CR0	 	x	 	 OS0  +  X
	  	
		 	 	 	 	 	OS0  +  Y	  	

  

					
	where
			
	 CR’
	 	=	  	the Conversion Rate in effect immediately prior to the Opening of Business on the record date for such distribution;
			
	 CR0
	 	=	  	the Conversion Rate in effect at 5:00 p.m., New York City time, on the Trading Day immediately preceding the record date for such distribution;
			
	 OS0
	 	=	  	the number of shares of Common Stock outstanding at 5:00 p.m., New York City time, on the Trading Day immediately preceding the Ex-Dividend Date for such
distribution;
			
	 X
	 	=	  	the total number of shares of Common Stock issuable pursuant to such rights or warrants; and
			
	 Y
	 	=	  	the number of shares of Common Stock equal to the aggregate price payable to exercise such rights or warrants, divided by the average of the Last Reported Sale Prices of Common
Stock over the 10 consecutive Trading Day period ending on the Trading Day immediately preceding the record date for such distribution.

 Such adjustment shall be successively made whenever any such rights or warrants are issued and shall
become effective immediately prior to the Opening of Business on the record date for such distribution. If such rights or warrants are not so exercised prior to their expiration, the Conversion Rate shall again be adjusted to be the Conversion Rate
that would then be in effect if such record date for such distribution had not been fixed. 
 In determining whether any rights
or warrants entitle the holder thereof to subscribe for or purchase shares of Common Stock at a price per share less than the Last Reported Sale Price of the Common Stock on the Trading Day immediately preceding the declaration date of such
distribution, and in determining the aggregate offering price of such Common Stock, there shall be taken into account any consideration received by the Company for such rights or warrants and any amount payable on exercise or conversion thereof,
where the value of such consideration, if other than cash, shall be determined by the Board of Directors. 
  

 25 

 (c) In case the Company shall distribute shares of Capital Stock, evidences of indebtedness
or other assets or property to all or substantially all holders of its Common Stock (excluding dividends and distributions covered by Section 8.04(a), Section 8.04(b), Section 8.04(d), and distributions described below in this
Section 8.04(c) with respect to Spin-Offs (as defined below)) (any of such shares of Capital Stock, evidences of indebtedness or other asset or property hereinafter in this Section 8.04(c) called the “Distributed
Property”), then, in each such case the Conversion Rate shall be adjusted based on the following formula: 
  

													
		 	 CR’
	 	=	 	CR0	 	x	 	 SP0
	  	
		 	 	 	 	 	SP0  –  FMV	  	

  

					
	where
			
	 CR’
	 	=	  	the Conversion Rate in effect immediately prior to the Opening of Business on the record date for such distribution;
			
	 CR0
	 	=	  	the Conversion Rate in effect at 5:00 p.m., New York City time, on the Trading Day immediately preceding the record date for such distribution;
			
	 SP0
	 	=	  	the average of the Last Reported Sale Prices of the Common Stock over the ten consecutive Trading Day period ending on the Trading Day immediately preceding the record date for such
distribution; and
			
	 FMV
	 	=	  	the fair market value (as determined by the Board of Directors or a committee thereof) of the Distributed Property distributed with respect to each outstanding share of Common Stock
as of the Opening of Business on the record date for such distribution.

 Such adjustment shall become effective immediately prior to the Opening of
Business on the record date for shareholders entitled to receive such distribution; provided that (1) if the then fair market value (as so determined) of the portion of the Distributed Property so distributed applicable to one share of Common
Stock is equal to or greater than SP0 as set forth above or
(2) if SP0 exceeds the fair market value of the
Distributed Property by less than $1.00, in lieu of the foregoing adjustment, adequate provision shall be made so that each Noteholder shall have the right to receive, for each $1,000 principal amount of Notes upon conversion, the amount of
Distributed Property such Holder would have received had such Holder converted such Notes immediately prior to the record date for determining the shareholders of the Company entitled to receive the Distributed Property. If such dividend or
distribution is not so paid or made, the Conversion Rate shall again be adjusted to be the Conversion Rate that would then be in effect if such dividend or distribution had not been declared. If the Board of Directors determines the fair market
value of any distribution for purposes of this Section 8.04(c) by reference to the actual or when issued trading market for any securities, it must in doing so consider the prices in such market over the same period used in determining
SP0 above. 
  

 26 

 With respect to an adjustment pursuant to this Section 8.04(c) where there has been a
payment of a dividend or other distribution on the Common Stock in shares of Capital Stock of any class or series, or similar equity interest, of or relating to a Subsidiary or other business unit of the Company that are listed on a national or
regional securities exchange (a “Spin-Off”), then the Conversion Rate will be increased based on the following formula: 
  

													
		 	 CR’
	 	=	 	CR0	 	x	 	 FMV  +  MP0
	  	
		 	 	 	 	 	MP0	  	

  

					
	where
			
	 CR’
	 	=	  	the Conversion Rate in effect immediately prior to the Opening of Business on the record date for the Spin-Off;
			
	 CR0
	 	=	  	the Conversion Rate in effect at 5:00 p.m., New York City time, on the Trading Day immediately preceding the record date for the Spin-Off;
			
	 FMV
	 	=	  	the average of the Last Reported Sale Prices of the Capital Stock or other similar equity interest distributed to holders of Common Stock applicable to one share of Common Stock
over the first ten consecutive Trading Day period immediately following, and including, the third Trading Day after the record date for such Spin-Off (such period, the “Valuation Period”); and
			
	 MP0
	 	=	  	the average of the Last Reported Sale Prices of Common Stock over the Valuation Period.

 Such adjustment shall occur immediately after the Opening of Business on the day after the last day
of the Valuation Period but will be given effect as of the Opening of Business on the record date for the Spin-Off; provided that in respect of any conversion within the ten Trading Days following any Spin-Off, references within this
Section 8.04(c) to ten Trading Days shall be deemed replaced with such lesser number of Trading Days as have elapsed between such Spin-Off and the Conversion Date in determining the applicable Conversion Rate. Because the Company will make the
adjustment to the Conversion Rate at the end of the Valuation Period with retroactive effect, the Company will delay the settlement of any Notes where the final day of the related observation period occurs during the Valuation Period. In such event,
the Company will deliver shares of Common Stock (based on the adjusted Conversion Rate) on the third Business Day following the last day of the Valuation Period. 
 Rights or warrants distributed by the Company to all holders of Common Stock, entitling the holders thereof to subscribe for or purchase Capital Stock (either initially or under certain circumstances),
which rights or warrants, until the occurrence of a specified event or events (“Trigger Event”): (i) are deemed to be transferred with such Common Stock; (ii) are not exercisable; and (iii) are also issued in respect
of future issuances of Common Stock, shall be deemed not to have been distributed for purposes of this Section 8.04(c) (and no adjustment to the Conversion Rate under this Section 8.04(c) will be required) until the occurrence of the

  

 27 

 
earliest Trigger Event, whereupon such rights and warrants shall be deemed to have been distributed and an appropriate adjustment (if any is required) to the Conversion Rate shall be made under
this Section 8.04(c). If any such right or warrant, including any such existing rights or warrants distributed prior to the date of this Supplemental Indenture, are subject to events, upon the occurrence of which such rights or warrants become
exercisable to purchase different securities, evidences of indebtedness or other assets, then the date of the occurrence of any and each such event shall be deemed to be the date of distribution and record date with respect to new rights or warrants
with such rights (and a termination or expiration of the existing rights or warrants without exercise by any of the holders thereof). In addition, in the event of any distribution (or deemed distribution) of rights or warrants, or any Trigger Event
or other event (of the type described in the preceding sentence) with respect thereto that was counted for purposes of calculating a distribution amount for which an adjustment to the Conversion Rate under this Section 8.04 was made,
(1) in the case of any such rights or warrants that shall all have been redeemed or repurchased without exercise by any holders thereof, the Conversion Rate shall be readjusted upon such final redemption or repurchase to give effect to such
distribution or Trigger Event, as the case may be, as though it were a cash distribution, equal to the per share redemption or repurchase price received by a holder or holders of Common Stock with respect to such rights or warrants (assuming such
holder had retained such rights or warrants), made to all holders of Common Stock as of the date of such redemption or repurchase, and (2) in the case of such rights or warrants that shall have expired or been terminated without exercise by any
holders thereof, the Conversion Rate shall be readjusted as if such rights and warrants had not been issued. 
 For purposes of
this Section 8.04(c) and Section 8.04(a) and Section 8.04(b), any dividend or distribution to which this Section 8.04(c) is applicable that also includes a dividend or distribution of Common Stock to which Section 8.04(a)
applies or a dividend or distribution of rights or warrants to subscribe for or purchase Common Stock to which Section 8.04(a) or Section 8.04(b) applies (or both), shall be deemed instead to be (1) a dividend or distribution of the
evidences of indebtedness, assets or shares of Capital Stock other than such Common Stock or rights or warrants to which this Section 8.04(c) applies, and any Conversion Rate adjustment required by this Section 8.04(c) with respect to such
dividend or distribution shall then be made, immediately followed by (2) a dividend or distribution of such Common Stock or such rights or warrants (and any further Conversion Rate adjustment required by Section 8.04(a) and
Section 8.04(b) with respect to such dividend or distribution shall then be made), except (A) the record date of such dividend or distribution shall be substituted as “the record date” and “the date fixed for such
determination” within the meaning of Section 8.04(a) and Section 8.04(b) and (B) any Common Stock included in such dividend or distribution shall not be deemed outstanding “at 5:00 p.m., New York City time, on the Trading
Day immediately preceding the Ex-Dividend Date for such dividend or distribution or the effective date of such share split or combination” within the meaning of Section 8.04(a) or “at 5:00 p.m., New York City time, on the Trading Day
immediately preceding the Ex-Dividend Date for such distribution” within the meaning of Section 8.04(b). 
 (d) In
case the Company shall pay any cash dividends or distributions paid exclusively in cash to all or substantially all holders of Common Stock (other than dividends or distributions to which Section 8.06 applies), then the Conversion Rate will be
increased based on the following formula: 
  

													
		 	 CR’
	 	=	 	CR0	 	x	 	 SP0
	  	
		 	 	 	 	 	SP0  –  C	  	

  

 28 

					
	 where

			
	 CR’
	 	=	  	the Conversion Rate in effect immediately prior to the Opening of Business on the record date for such dividend or distribution;
			
	 CR0
	 	=	  	the Conversion Rate in effect at 5:00 p.m., New York City time, on the Trading Day immediately preceding the record date for such distribution;
			
	 SP0
	 	=	  	the average of the Last Reported Sale Prices of the Common Stock over the ten consecutive Trading Day period ending on the Trading Day immediately preceding the record date for such
distribution;
			
	 C
	 	=	  	the amount in cash per share that the Company distributes to holders of Common Stock.

 Such adjustment shall become effective immediately prior to the Opening of Business on the record
date for such dividend or distribution. 
 For the avoidance of doubt, for purposes of this Section 8.04(d), in the event
of any reclassification of the Common Stock, as a result of which the Notes become convertible into more than one class of Common Stock, if an adjustment to the Conversion Rate is required pursuant to this Section 8.04(d), references in this
Section to one share of Common Stock or Last Reported Sale Price of one share of Common Stock shall be deemed to refer to a unit or to the price of a unit consisting of the number of shares of each class of Common Stock into which the Notes are then
convertible equal to the number of shares of such class issued in respect of one share of Common Stock in such reclassification. The above provisions of this paragraph shall similarly apply to successive reclassifications. 
 (e) In case the Company or any of its Subsidiaries makes a payment in respect of a tender offer or exchange offer for Common Stock, to the
extent that the cash and value of any other consideration included in the payment per share of Common Stock exceeds the Last Reported Sale Price of the Common Stock on the Trading Day next succeeding the last date on which tenders or exchanges may
be made pursuant to such tender or exchange offer, then the Conversion Rate shall be increased based on the following formula: 
  

													
		 	 CR’
	 	=	 	CR0	 	x	 	 AC  +  (SP’  x  OS’)
	  	
		 	 	 	 	 	OS0  x  SP’	  	

  

 29 

					
	where
			
	 CR’
	 	=	  	the Conversion Rate in effect immediately prior to the Opening of Business on the Trading Day next succeeding the date such tender offer or exchange offer expires;
			
	 CR0
	 	=	  	the Conversion Rate in effect at 5:00 p.m., New York City time on the day such tender offer or exchange offer expires;
			
	 AC
	 	=	  	the aggregate value of all cash and any other consideration (as determined by the Board of Directors or a committee thereof) paid or payable for shares purchased in such tender or
exchange offer;
			
	 SP’
	 	=	  	the average of the Last Reported Sale Prices of Common Stock over the ten consecutive Trading Day period commencing on, and including, the Trading Day next succeeding the date such
tender or exchange offer expires (the “Averaging Period”);
			
	 OS’
	 	=	  	the number of shares of Common Stock outstanding immediately after the Close of Business on the date such tender or exchange offer expires (after giving effect to such tender offer
or exchange offer); and
			
	 OS0
	 	=	  	the number of shares of Common Stock outstanding immediately prior to the date such tender or exchange offer expires (prior to giving effect to such tender offer or exchange offer).

 Such adjustment shall become effective immediately prior to the Opening of Business on the day
following the last day of the Averaging Period, but will be given effect as of the Opening of Business on the Trading Day next succeeding the date such tender offer or exchange offer expires. Because the Company will make the adjustment to the
Conversion Rate at the end of the Averaging Period with retroactive effect, the Company will delay the settlement of any Notes where the final day of the related observation period occurs during the Averaging Period. In such event, the Company will
deliver shares of Common Stock, if any, (based on the adjusted Conversion Rate) on the third Business Day immediately following the last day of the Averaging Period. 
 (f) For purposes of this Section 8.04 the term “record date” shall mean, with respect to any dividend, distribution or other transaction or event in which the holders of shares of
Common Stock have the right to receive any cash, securities or other property or in which the shares of Common Stock (or other applicable security) is exchanged for or converted into any combination of cash, securities or other property, the date
fixed for determination of shareholders of the Company entitled to receive such cash, securities or other property (whether such date is fixed by the Board of Directors or by statute, contract or otherwise). 
 (g) All calculations and other determinations under this Article VIII shall be made by the Company in accordance with
Section 10.14 hereof and shall be made to the nearest cent or to the nearest one-ten thousandth (1/10,000) of a share, as the case may be. No adjustment shall be made for the Company’s issuance of Common Stock or any securities
convertible into or exchangeable for Common Stock, or the right to purchase Common Stock or such convertible or exchangeable securities, other than as provided in this Section 8.04. No adjustment shall be made to the Conversion Rate unless such
adjustment would require a change of at least 1% in the Conversion Rate then in effect at such time. The Company shall carry forward any adjustments that are less than 1% of the

  

 30 

 
Conversion Rate, take such carried-forward adjustments into account in any subsequent adjustment, and make such carried forward adjustments, regardless of whether the aggregate adjustment is less
than 1%, (i) annually on the anniversary of the first date of issue of the Notes and otherwise (ii)(1) five Business Days prior to the first day of the conversion period related to the Maturity of the Notes (whether at Stated Maturity or
otherwise) or (2) prior to any Fundamental Change Repurchase Date, unless such adjustment has already been made. 
 (h)
Whenever the Conversion Rate is adjusted as herein provided, the Company shall promptly file with the Trustee and any Conversion Agent other than the Trustee an Officers’ Certificate setting forth the Conversion Rate after such adjustment and
setting forth a brief statement of the facts requiring such adjustment. The Trustee and Conversion Agent may conclusively rely on the accuracy of the Conversion Rate adjustment provided by the Company. Unless and until a Responsible Officer of the
Trustee shall have received such Officers’ Certificate, the Trustee shall not be deemed to have knowledge of any adjustment of the Conversion Rate and may assume without inquiry that the last Conversion Rate of which it has knowledge is still
in effect. Promptly after delivery of such certificate, the Company shall prepare a notice of such adjustment of the Conversion Rate setting forth the adjusted Conversion Rate and the date on which each adjustment becomes effective and shall issue a
press release containing the relevant information and make the information available on the Company’s website or through another public medium as the Company may use at such time. 
 (i) For purposes of this Section 8.04, the number of shares of Common Stock at any time outstanding shall not include shares held in
the treasury of the Company but shall include shares issuable in respect of scrip certificates issued in lieu of fractions of shares of Common Stock. 
 Section 8.05. Shares to be Fully Paid Subject to Section 8.03(d), the Company shall provide, free from preemptive rights, sufficient Common Stock to provide for conversion of the Notes
from time to time as such Notes are presented for conversion. 
 Section 8.06. Effect of Reclassification,
Consolidation, Merger or Sale 
 (a) If the Company: 
 (i) reclassifies or changes its Common Stock (other than changes resulting from a subdivision or combination); or 

(ii) consolidates or merges with or into any person or sells, leases, transfers, conveys or otherwise disposes of all or
substantially all of its assets and those of its Subsidiaries taken as a whole to another Person; 
 and in either case holders of Common Stock
receive stock, other securities or other property or assets (including cash or any combination thereof) with respect to or in exchange for their Common Stock (any such event, a “Merger Event”), then from and after the effective date
of such Merger Event, the Company or the successor or purchasing Person, as the case may be, shall execute with the Trustee a supplemental indenture (which shall comply with the Trust Indenture Act as in force at the date of execution of such
supplemental indenture) providing that at and after the effective time of such Merger Event, each Outstanding Note will, without

  

 31 

 
the consent of Holders of the Notes, become convertible in accordance with the Indenture into the consideration the holders of Common Stock received in such reclassification, change,
consolidation, merger, sale, lease, transfer, conveyance or other disposition (such consideration, the “Reference Property”). If the transaction causes the Common Stock to be converted into the right to receive more than a single
type of consideration (determined based in part upon any form of shareholder election), the Reference Property into which the Notes will become convertible will be deemed to be the kind and amount of consideration elected to be received by a
majority of Common Stock which voted for such election (if electing between two types of consideration) or a plurality of Common Stock which voted for such an election (if electing between more than two types of consideration), as the case may be.
The Company shall not become a party to any such Merger Event unless its terms are consistent with this Section 8.06 in all material respects. 
 (b) The Company shall cause notice of the execution of such supplemental indenture to be mailed to each Holder, at the address of such Holder as it appears on the register of the Notes maintained by the
Security Registrar, within 20 days after execution thereof. Failure to deliver such notice shall not affect the legality or validity of such supplemental indenture. The above provisions of this Section 8.06 shall similarly apply to successive
reclassifications, changes, consolidations, mergers, combinations, sales and conveyances. If this Section 8.06 applies to any Merger Event, Section 8.04 shall not apply. 
 Section 8.07. Intentionally Omitted 
 Section 8.08. Intentionally Omitted 
 Section 8.09. Notice to
Holders Prior to Certain Actions 
 In case: 
 (a) the Company shall declare a dividend (or any other distribution) on its Common Stock that would require an adjustment in the Conversion Rate pursuant to Section 8.04; or 
 (b) the Company shall authorize the granting to all of the holders of its Common Stock of rights or warrants to subscribe for or purchase
any share of any class or any other rights or warrants; 
 (c) of any reclassification of Common Stock (other than a subdivision
or combination of the outstanding Common Stock, or a change in par value, or from par value to no par value, or from no par value to par value), or of any consolidation or merger to which the Company is a party and for which approval of any
shareholders of the Company is required, or of the sale or transfer of all or substantially all of the assets of the Company; or 
 (d) of the voluntary or involuntary dissolution, liquidation or winding-up of the Company, the Company shall cause to be filed with the Trustee and to be mailed to each Noteholder at his address appearing on the Security Register as
promptly as possible but in any event at least thirty (30) days prior to the applicable date specified in clause (x) or (y) below, as the case may be, a notice

  

 32 

 
stating (x) the date on which a record is to be taken for the purpose of such dividend, distribution or rights or warrants, or, if a record is not to be taken, the date as of which the
holders of Common Stock of record to be entitled to such dividend, distribution or rights are to be determined, or (y) the date on which such reclassification, consolidation, merger, sale, transfer, dissolution, liquidation or winding-up is
expected to become effective or occur, and the date as of which it is expected that holders of Common Stock of record shall be entitled to convert their Common Stock for securities or other property deliverable upon such reclassification,
consolidation, merger, sale, transfer, dissolution, liquidation or winding-up. Failure to give such notice, or any defect therein, shall not affect the legality or validity of such dividend, distribution, reclassification, consolidation, merger,
sale, transfer, dissolution, liquidation or winding-up. 
 Section 8.10. Shareholder Rights Plans To the extent that
any future shareholders’ rights plan adopted by the Company is in effect upon conversion of the Notes into Common Stock, Holders shall receive, in addition to any Common Stock issuable upon such conversion, the rights under the applicable
rights agreement unless the rights have separated from the Common Stock at the time of conversion of the Notes, in which case, the Conversion Rate will be adjusted as if the Company distributed to all holders of its Common Stock shares of its
Capital Stock, evidences of indebtedness or assets as described in Section 8.04(c), subject to readjustment in the event of the expiration, termination or redemption of such rights. If, and only if, the Holders receive rights under such
shareholders’ rights plan as described in the preceding sentence upon conversion of their Notes, then no other adjustment pursuant to this Article VIII shall be made in connection with such shareholders’ rights plan. 
 ARTICLE IX 
 REPURCHASE OF NOTES AT OPTION OF HOLDERS 
 Section 9.01. Repurchase of Securities at Option of the
Holder on Specified Dates The provisions of Article Thirteen of the Base Indenture shall not be applicable to the Notes. 
 Section 9.02. Repurchase at Option of Holders Upon a Fundamental Change 
 (a) If a Fundamental Change
occurs at any time prior to the Maturity Date, then each Noteholder shall have the right, at such Holder’s option, to require the Company to repurchase all of such Holder’s Notes or any portion thereof that is a multiple of $1,000
principal amount, for cash on or after the Close of Business on the date (the “Fundamental Change Repurchase Date”) specified by the Company that is not less than twenty (20) calendar days and not more than thirty-five
(35) calendar days after the date of the Fundamental Change Company Notice (as defined below) at a repurchase price equal to 100% of the principal amount thereof, together with accrued and unpaid interest thereon (including Additional Interest
and Filing Additional Interest, if any) to, but excluding, the Fundamental Change Repurchase Date (the “Fundamental Change Repurchase Price”); provided, however, if the Fundamental Change Repurchase Date is after a Record Date and
on or prior to the corresponding Interest Payment Date, the accrued and unpaid interest (including Additional Interest and Filing Additional Interest, if any) will be paid on the Fundamental Change Repurchase Date to the Holder of record on the
Record Date. 
  

 33 

 Repurchases of Notes under this Section 9.02 shall be made, at the option of the Holder
thereof, upon: 
 (i) delivery to the Trustee (or other Paying Agent appointed by the Company) by a Holder of a
duly completed notice (the “Fundamental Change Repurchase Notice”) in the form set forth on the reverse of the Note at any time prior 5:00 p.m., New York City Time, on the Fundamental Change Repurchase Date; and 
 (ii) delivery or book-entry transfer of the Notes to the Trustee (or other Paying Agent appointed by the Company) at any time
after delivery of the Fundamental Change Repurchase Notice (together with all necessary endorsements) at the Corporate Trust Office of the Trustee (or other Paying Agent appointed by the Company) in the Borough of Manhattan, such delivery being a
condition to receipt by the Holder of the Fundamental Change Repurchase Price therefor; provided that such Fundamental Change Repurchase Price shall be so paid pursuant to this Section 9.02 only if the Note so delivered to the Trustee
(or other Paying Agent appointed by the Company) shall conform in all respects to the description thereof in the related Fundamental Change Repurchase Notice. 
 The Fundamental Change Repurchase Notice shall state: 
 (A) if
certificated, the certificate numbers of Notes to be delivered for repurchase; 
 (B) the portion of the
principal amount of Notes to be repurchased, which must be $1,000 or an integral multiple thereof; 
 (C) that
the Notes are to be repurchased by the Company pursuant to the applicable provisions of the Notes and the Indenture; and 
 (D) if such Fundamental Change Repurchase Notice is delivered prior to the occurrence of a Fundamental Change pursuant to a definitive agreement giving rise to a Fundamental Change, that the Holder
acknowledges that the Company’s offer is conditioned on the occurrence of such Fundamental Change. 
 provided, however, that
if the Notes are not in certificated form, the Fundamental Change Repurchase Notice must comply with appropriate procedures of the Depositary. 
 Any repurchase by the Company contemplated pursuant to the provisions of this Section 9.02 shall be consummated by the delivery of the consideration to be received by the Holder promptly following
the later of the Fundamental Change Repurchase Date and the time of the book-entry transfer or delivery of the Note. 
  

 34 

 The Trustee (or other Paying Agent appointed by the Company) shall promptly notify the
Company of the receipt by it of any Fundamental Change Repurchase Notice or written notice of withdrawal thereof in accordance with the provisions of Section 9.02(c). 
 Any Note that is to be repurchased only in part shall be surrendered to the Trustee (with, if the Company or the Trustee so requires, due
endorsement by, or a written instrument of transfer in form satisfactory to the Company and the Trustee duly executed by the Holder thereof or his attorney duly authorized in writing), and the Company shall execute, and the Trustee shall
authenticate and make available for delivery to the Holder of such Note without service charge, a new Note or Notes, containing identical terms and conditions, each in an authorized denomination in aggregate principal amount equal to and in exchange
for the unrepurchased portion of the principal of the Note so surrendered. 
 (b) At any time following the
Company entering into a definitive agreement that, if consummated, would give rise to a Fundamental Change, but in any event not later than the fifth (5th) calendar day after the occurrence of a Fundamental Change, the Company shall provide to all Holders of record of
the Notes as of the date of the Fundamental Change Company Notice at their addresses shown in the Security Register (and to beneficial owners to the extent required by applicable law) and the Trustee and Paying Agent a written notice (the
“Fundamental Change Company Notice”) of the occurrence of such Fundamental Change and of the repurchase right at the option of the Holders arising as a result thereof. Such mailing shall be by first class mail. Simultaneously with
providing such Fundamental Change Company Notice, the Company shall publish a notice containing the information included therein once in a newspaper of general circulation in The City of New York or publish such information on the Company’s
website or through such other public medium as the Company may use at such time. 
 Each Fundamental Change Company Notice shall
specify: 
 (i) the events causing the Fundamental Change; 
 (ii) the date of the Fundamental Change; 
 (iii) if such Fundamental Change Company Notice is delivered prior to the occurrence of a Fundamental Change pursuant to a
definitive agreement giving rise to a Fundamental Change, that the offer is conditioned on the occurrence of such Fundamental Change; 
 (iv) that the Holder must exercise the repurchase right prior to the Close of Business on the Fundamental Change Repurchase Date; 
 (v) the Fundamental Change Repurchase Price; 
 (vi) the Fundamental Change Repurchase Date; 
 (vii) the name and address of the Paying Agent and the Conversion Agent; 
  

 35 

 (viii) the applicable Conversion Rate and any adjustments to the applicable
Conversion Rate; 
 (ix) that the Notes with respect to which a Fundamental Change Repurchase Notice has been
delivered by a Holder may be converted only if the Holder withdraws the Fundamental Change Repurchase Notice in accordance with the terms of the Indenture; and 
 (x) the procedures that Holders must follow to require the Company to repurchase their Notes. 
 No failure of the Company to give the foregoing notices and no defect therein shall limit the Noteholders’ repurchase rights or affect
the validity of the proceedings for the repurchase of the Notes pursuant to this Section 9.02. 
 (c) A Fundamental Change
Repurchase Notice may be withdrawn by delivering a written notice of withdrawal to the Paying Agent in accordance with the Fundamental Change Company Notice at any time prior to the 5:00 p.m., New York City time, on the Fundamental Change
Repurchase Date, specifying: 
 (i) the principal amount of the Notes with respect to which such notice of
withdrawal is being submitted; 
 (ii) the principal amount, if any, of such Notes that remains subject to the
original Fundamental Change Repurchase Notice, which portion must be in principal amounts of $1,000 or an integral multiple of $1,000; and 
 (iii) if certificated Notes have been issued, the certificate numbers of the withdrawn Notes; and 
 provided, however, that if the Notes are not in certificated form, the notice must comply with appropriate procedures of the Depositary. The Paying Agent will promptly return to the respective Holders thereof any certificated
Notes with respect to which a Fundamental Change Repurchase Notice has been withdrawn in compliance with the provisions of this Section 9.02(c). If the Notes are not in certificated form, such return must comply with the appropriate procedures
of the Depositary. If a Fundamental Change Repurchase Notice is given and then subsequently withdrawn in accordance with this Section 9.02(c), then the Company shall not be obligated to repurchase any Notes listed in such Fundamental Change
Repurchase Notice. 
 (d) On or prior to 11:00 a.m. (local time in The City of New York) on the Business Day following the
Fundamental Change Repurchase Date, the Company will deposit with the Trustee (or other Paying Agent appointed by the Company) or if the Company is acting as its own Paying Agent, set aside, segregate and hold in trust in accordance with the
Indenture an amount of money or securities sufficient to repurchase as of the Fundamental Change Repurchase Date all of the Notes to be repurchased as of such date at the Fundamental Change Repurchase Price. Subject to receipt of funds and/or Notes
by the Trustee (or other Paying Agent appointed by the Company), payment for Notes surrendered for repurchase (and not withdrawn) prior to the Close of Business on the Fundamental Change Repurchase Date will be made promptly after the later of
(x) the Fundamental Change Repurchase Date

  

 36 

 
with respect to such Note (provided the Holder has satisfied the conditions to the payment of the Fundamental Change Repurchase Price in this Section 9.02), and (y) the time of
book-entry transfer or the delivery of such Note to the Trustee (or other Paying Agent appointed by the Company) by the Holder thereof in the manner required by this Section 9.02 by mailing checks for the amount payable to the Holders of such
Notes entitled thereto as they shall appear in the Security Register (in the case of certificated Notes) by wire transfer of immediately available funds to the account of the Depositary or its nominee (if the Notes are not in certificated form). The
Trustee shall, promptly after such payment return to the Company any funds in excess of the Fundamental Change Repurchase Price. 
 (e) If the Trustee (or other Paying Agent appointed by the Company) holds money or securities sufficient to repurchase as of the Fundamental Change Repurchase Date all the Notes or portions thereof that are to be purchased as of the
Business Day following the Fundamental Change Repurchase Date, then on and after the Fundamental Change Repurchase Date (i) such Notes will cease to be Outstanding, (ii) interest (including Additional Interest and Filing Additional
Interest, if any) will cease to accrue on such Notes, whether or not book-entry transfer of the Notes has been made or the Notes have been delivered to the Trustee or Paying Agent, as the case may be, and (iii) all other rights of the Holders
of such Notes will terminate other than the right to receive the Fundamental Change Repurchase Price upon delivery or transfer of such Notes. 
 Section 9.03. No Payment Following Acceleration of the Notes 
 There
shall be no purchase of any Notes pursuant to this Article IX if the principal amount of the Notes has been accelerated, and such acceleration has not been rescinded on or prior to the Fundamental Change Purchase Date. The Trustee (or other Paying
Agent appointed by the Company) will promptly return to the respective Holders thereof any certificated Notes held by it following acceleration of the Notes and shall deem canceled any instructions for book-entry transfer of the Notes in compliance
with the procedures of the Depositary, in which case, upon such return and cancellation, the Fundamental Change Repurchase Notice with respect thereto shall be deemed to have been withdrawn. 
 Section 9.04. Compliance with Tender Offer Rules 
 In connection with any offer to purchase Notes under Section 9.02 hereof, the Company shall, in each case if required, (a) comply with Rule 13e-4, Rule 14e-1 and any other tender offer rules
under the Exchange Act that may then be applicable, (b) file a Schedule TO or any other required schedule under the Exchange Act and (c) otherwise comply with all federal and state securities laws so as to permit the rights and obligations
under Section 9.02 to be exercised in the time and in the manner specified in Section 9.02. 
  

 37 

 ARTICLE X 
 MISCELLANEOUS PROVISIONS 
 Section 10.01.
Ratification of Base Indenture Except as expressly modified or amended hereby, the Base Indenture continues in full force and effect and is in all respects confirmed, ratified and preserved and the provisions thereof shall be applicable to
the Notes and this Supplemental Indenture. 
 Section 10.02. Provisions Binding on Company’s Successors All the
covenants, stipulations, promises and agreements of the Company contained in this Supplemental Indenture shall bind its successors and assigns whether so expressed or not. 
 Section 10.03. Official Acts by Successor Corporation Any act or proceeding by any provision of this Supplemental Indenture
authorized or required to be done or performed by any board, committee or officer of the Company shall and may be done and performed with like force and effect by the like board, committee or officer of any corporation or entity that shall at the
time be the lawful sole successor of the Company. 
 Section 10.04. Addresses for Notices,
Etc. Any notice or demand which by any provision of this Supplemental Indenture is required or permitted to be given or served by the Trustee or by the Noteholders on the Company or the Guarantors shall be deemed to have been sufficiently
given or made, for all purposes if given or served by being deposited postage prepaid by registered or certified mail in a post office letter box addressed (until another address is filed by the Company with the Trustee) to the Company, 800 S.
Douglas Road, 12th Floor, Coral Gables, Florida,
Attention: Albert de Cardenas Esq. Any notice, direction, request or demand hereunder to or upon the Trustee shall be deemed to have been sufficiently given or made, for all purposes, if given or served by being deposited postage prepaid by
registered or certified mail in a post office letter box addressed to U.S. Bank National Association, 100 Wall Street, Suite 1600, New York, New York 10005, Attention: Corporate Trust Services/MasTec. 
 The Trustee, by notice to the Company, may designate additional or different addresses for subsequent notices or communications. 

Any notice or communication mailed to a Noteholder shall be mailed to him by first class mail, postage prepaid, at his address as it
appears on the Security Register and shall be sufficiently given to him if so mailed within the time prescribed. 
 Failure to
mail a notice or communication to a Noteholder or any defect in it shall not affect its sufficiency with respect to other Noteholders. If a notice or communication is mailed in the manner provided above, it is duly given, whether or not the
addressee receives it. 
 Section 10.05. Governing Law THIS SUPPLEMENTAL INDENTURE AND THE NOTES SHALL BE GOVERNED
BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO CONFLICT OF LAWS PRINCIPLES OF SUCH STATE OTHER THAN NEW YORK GENERAL OBLIGATIONS LAW SECTION 5-1401. THIS SUPPLEMENTAL INDENTURE IS SUBJECT TO THE PROVISIONS OF
THE TIA THAT ARE REQUIRED TO BE A PART OF THIS SUPPLEMENTAL INDENTURE AND SHALL, TO THE EXTENT APPLICABLE, BE GOVERNED BY SUCH PROVISIONS. 
  

 38 

 Section 10.06. Non-Business Day Section 113 of the Base Indenture shall
also apply to any Fundamental Change Purchase Date or Conversion Date in respect of the Notes. 
 Section 10.07.
Benefits of Indenture Nothing in this Supplemental Indenture or in the Notes, expressed or implied, shall give to any person, other than the parties hereto, any Paying Agent, any authenticating agent, any Security Registrar and their
successors hereunder, the Noteholders, any benefit or any legal or equitable right, remedy or claim under this Supplemental Indenture. 
 Section 10.08. Table of Contents, Headings, Etc. The table of contents and the titles and headings of the articles and sections of this Supplemental Indenture have been inserted for convenience of reference only,
are not to be considered a part hereof, and shall in no way modify or restrict any of the terms or provisions hereof. 
 Section 10.09. Counterparts This Supplemental Indenture may be executed and delivered in any number of counterparts, each of which when so executed and delivered shall be deemed to be an original, and all such counterparts shall
together constitute but one and the same instrument. 
 Section 10.10. Trustee The Trustee makes no representations
as to the validity or sufficiency of this Supplemental Indenture. The statements and recitals herein are deemed to be those of the Company and not of the Trustee. 
 Section 10.11. Further Instruments and Acts Upon request of the Trustee, the Company will execute and deliver such further instruments and do such further acts as may be reasonably necessary
or proper to carry out more effectively the purposes of this Supplemental Indenture. 
 Section 10.12. Waiver of Jury
Trial EACH OF THE COMPANY, THE GUARANTORS AND THE TRUSTEE HEREBY IRREVOCABLY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING ARISING OUT OF OR RELATING TO THIS INDENTURE, THE
NOTES OR THE TRANSACTION CONTEMPLATED HEREBY. 
 Section 10.13. Force Majeure In no event shall the Trustee or
Conversion Agent be responsible or liable for any failure or delay in the performance of its obligations hereunder arising out of or caused by, directly or indirectly, forces beyond its control, including, without limitation, strikes, work
stoppages, accidents, acts of war or terrorism, civil or military disturbances, nuclear or natural catastrophes or other acts of God, and interruptions, loss or malfunction of utilities, communications or computer (software or hardware) services; it
being understood that the Trustee and the Conversion Agent shall use reasonable efforts which are consistent with accepted practices in the banking industry to resume performance as soon as practicable under the circumstances. 
  

 39 

 Section 10.14. Calculations Except as otherwise provided in this Supplemental
Indenture, the Company shall be responsible for making all calculations called for under the Notes. These calculations include, but are not limited to, determinations of the Last Reported Sale Price of Common Stock, accrued interest payable on the
Notes and the Conversion Rate and Conversion Price. The Company or its agents shall make all these calculations in good faith and, absent manifest error, such calculations will be final and binding on Holders of the Notes. The Company shall provide
a schedule of these calculations to each of the Trustee and the Conversion Agent, and each of the Trustee and Conversion Agent is entitled to rely upon the accuracy of the Company’s calculations without independent verification. The Trustee
will forward these calculations to any Holder of the Notes upon the request of that Holder. 
 ARTICLE XI 
 GUARANTEES 
 Section 11.01. Guarantee Subject to this Article XI, each of the Guarantors hereby, jointly and severally, unconditionally guarantees on an unsecured, unsubordinated basis, to each Holder of a Note authenticated and
delivered by the Trustee and to the Trustee and its successors and assigns, irrespective of the validity and enforceability of this Supplemental Indenture or the Base Indenture, the Notes or the obligations of the Company hereunder or thereunder,
that: 
 (i) the principal of, premium, Additional Interest (if any) and Filing Additional Interest (if any) and
interest on, the Notes will be promptly paid in full when due, whether at maturity, by acceleration or otherwise, and interest on the overdue principal and interest on the Notes, if any, if lawful, and all other obligations of the Company to the
Holders or the Trustee hereunder or thereunder will be promptly paid in full or performed, all in accordance with the terms hereof and thereof; and 
 (ii) in case of any extension of time of payment or renewal of any Notes or any of such other obligations, that same will be promptly paid in full when due or performed in accordance with the terms of the
extension or renewal, whether at Stated Maturity, by acceleration or otherwise. 
 Failing payment when due of any amount so
guaranteed or any performance so guaranteed for any whatever reason, the Guarantors shall be jointly and severally obligated to pay the same immediately. Each Guarantor agrees that this is a guarantee of payment and not a guarantee of collection.

 (b) The Guarantors hereby agree that their obligations hereunder are unconditional, irrespective of the validity, regularity
or enforceability of this Supplemental Indenture or the Base Indenture, the Notes, the absence of any action to enforce the same, any waiver or consent by any Holder of the Notes with respect to any provisions hereof or thereof, the recovery of any
judgment against the Company, any action to enforce the same or any other circumstance which might otherwise constitute a legal or equitable discharge or defense of a Guarantor. Each Guarantor hereby waives diligence, presentment, demand of payment,
filing of claims with a court in the event of bankruptcy or insolvency of the Company, any right to require a proceeding first against the Company, protest, notice and all demands whatsoever and covenant that this Guarantee will not be discharged
except by complete performance of the obligations contained in the Notes and the Indenture. 
  

 40 

 (c) If any Holder or the Trustee is required by any court or otherwise to return to the
Company, the Guarantors or any custodian, trustee, liquidator or other similar official acting in relation to either the Company or the Guarantors, any amount paid either to the Trustee or such Holder, this Guarantee, to the extent theretofore
discharged, shall be reinstated in full force and effect. 
 (d) Each Guarantor agrees that it shall not be entitled to any
right of subrogation in relation to the Holders in respect of any obligations guaranteed hereby until payment in full of all obligations under the Notes guaranteed hereby. Each Guarantor further agrees that, as between the Guarantors, on the one
hand, and the Holders and the Trustee, on the other hand, (1) the maturity of the obligations guaranteed hereby may be accelerated as provided in Article Five of the Base Indenture for the purposes of this Guarantee, notwithstanding any
stay, injunction or other prohibition preventing such acceleration in respect of the obligations guaranteed hereby, and (2) in the event of any declaration of acceleration of such obligations as provided in Article Five of the Base
Indenture, such obligations (whether or not due and payable) will forthwith become due and payable by the Guarantors for purposes of this Guarantee. The Guarantors will have the right to seek contribution from any other Guarantor, or the Company, as
the case may be, so long as the exercise of such right does not impair the rights of the Holders under the Guarantee. 
 Section 11.02. Limitation on Guarantor Liability Each Guarantor, and by its acceptance of the Notes, each Holder, hereby confirms that it is the intention of all such parties that the Guarantee of such Guarantor not constitute a
fraudulent transfer, fraudulent conveyance or fraudulent obligation for purposes of Bankruptcy Law, the Uniform Fraudulent Conveyance Act, the Uniform Fraudulent Transfer Act or any similar federal or state law to the extent applicable to any
Guarantee. To effectuate the foregoing intention, the Trustee, the Holders and the Guarantors hereby irrevocably agree that the obligations of such Guarantor shall be limited to the maximum amount that shall, after giving effect to such maximum
amount and all other contingent and fixed liabilities of such Guarantor that are relevant under such laws, and after giving effect to any collections from, rights to receive contributions from or payments made by or on behalf of any other Guarantor
in respect of the obligations of such other Guarantor under this Article XI that are relevant under such laws, result in the obligations of such Guarantor under its Guarantee not constituting a fraudulent transfer, fraudulent conveyance or
fraudulent obligation. 
 Section 11.03. Execution and Delivery of Guarantees 
 (a) To evidence its Guarantee set forth in Section 11.01 hereof, each Guarantor hereby agrees that this Supplemental Indenture shall be
executed on behalf of such Guarantor by one of its authorized officers. 
  

 41 

 (b) Each Guarantor hereby agrees that its Guarantee set forth in Section 11.01 hereof
shall remain in full force and effect notwithstanding the absence of the endorsement of any notation of such Guarantee. 
 (c)
If an officer whose signature is on this Supplemental Indenture no longer holds that office at the time the Trustee authenticates the Note, the Guarantee shall be valid nevertheless. 
 (d) The delivery of any Note by the Trustee, after the authentication thereof hereunder, shall constitute delivery of the Guarantee set
forth in the Indenture on behalf of the Guarantors. 
 (e) If required by Section 4.04 hereof, the Company shall cause any
Subsidiary that is not a Guarantor to comply with the provisions of Section 4.04 hereof and this Article XI, to the extent applicable. 
 Section 11.04. Contribution Each Guarantor that makes a payment or distribution under its Guarantee shall be entitled to contribution from any other Guarantor or the Company, as the case may
be. 
 Section 11.05. Releases The Guarantee issued by any Guarantor shall be automatically and unconditionally
released and discharged upon: 
 (a) any sale, exchange or transfer to any Person (other than an Affiliate of the Company) of
(i) the Capital Stock of such Guarantor so that such Guarantor is no longer a Subsidiary of the Company or (ii) all or substantially all the assets of such Guarantor; 
 (b) the release or discharge of the guarantee which resulted in the creation of such Guarantee, except a discharge or release by or as a
result of payment under such guarantee; or 
 (c) the release or discharge of any and all guarantees of all other unsecured
indebtedness of the Company provided by such Guarantor to the holders of other unsecured indebtedness (including any deemed release upon payment in full of all obligations under such other unsecured indebtedness); provided, however, to
the extent that any Wholly Owned Domestic Subsidiary of the Company provides a guarantee of any unsecured indebtedness of the Company in the future, such Wholly Owned Domestic Subsidiary shall be required to guarantee the Notes in accordance with
Section 4.04 hereof. 
 Provided, in each case, that such release or discharge shall not become effective until the receipt by the
Trustee of an Officers’ Certificate stating that all conditions precedent to the release and discharge of the Guarantee have been complied with. 
  

 42 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be
duly executed by their respective officers hereunto duly authorized, all as of the day and year first above written. 
  

					
	COMPANY:
	
	MasTec, Inc.
		
	 By:
	 	 /s/ Alberto de Cardenas

		 	 Name:
	 	Alberto de Cardenas
		 	 Title:
	 	Executive Vice President, General Counsel and Secretary
	
	GUARANTORS:
	
	 Church & Tower, Inc.

	 MasTec Brazil I, Inc.

	 MasTec Brazil II, Inc.

	 MasTec Contracting Company, Inc.

	 MasTec Latin America, Inc.

	 MasTec North America, Inc.

	 MasTec Services Company, Inc.

	 MasTec Spain, Inc.

	 MasTec Venezuela, Inc.

	 Nsoro MasTec International, Inc.

		
	 By:
	 	 /s/ Alberto de Cardenas

		 	 Name:
	 	Alberto de Cardenas
		 	 Title:
	 	Executive Vice President, General Counsel and Secretary

  

					
	 Direct Star TV, LLC

	 GlobeTec Construction, LLC

	 MasTec North America AC, LLC

	 MasTec Property Holdings, LLC

	 MasTec Residential Services, LLC

	 Nsoro MasTec, LLC

	 Power Partners MasTec, LLC

	
	 By their sole member:

	 MasTec North America, Inc.,

		
	 By:
	 	 /a/ Alberto de Cardenas

		 	 Name:
	 	Alberto de Cardenas
		 	 Title:
	 	Executive Vice President, General Counsel and Secretary
	
	 Pumpco, Inc.

		
	 By:
	 	 /a/ Alberto de Cardenas

		 	 Name:
	 	Alberto de Cardenas
		 	 Title:
	 	Executive Vice President, General Counsel and Secretary
	
	 Three Phase Acquisition Corp.

		
	 By:
	 	 /s/ Pablo Alvarez

		 	 Name:
	 	Pablo Alvarez
		 	 Title:
	 	Vice President, Secretary and Treasurer
	
	 Wanzek Construction, Inc.

		
	 By:
	 	 /a/ Alberto de Cardenas

		 	 Name:
	 	Alberto de Cardenas
		 	 Title:
	 	Secretary

  

					
	 Three Phase Line Construction, Inc.

		
	 By:
	 	 /s/ Peter Johnson

		 	 Name:
	 	Peter Johnson
		 	 Title:
	 	President

					
	 U.S. BANK NATIONAL ASSOCIATION,

	as Trustee
		
	 By:
	 	 /s/ Richard Prokosch

		 	 Name:
	 	Richard Prokosch
		 	 Title:
	 	Vice President

  

 SCHEDULE A 
 Stock Price 
  

																													
	 Effective Date
	  	$11.68	  	$12.00	  	$13.00	  	$14.00	  	$15.00	  	$17.50	  	$20.00	  	$25.00	  	$30.00	  	$40.00	  	$50.00	  	$75.00	  	$100.00	  	$125.00
	 November 4, 2009
	  	21.0002	  	20.4402	  	18.8679	  	17.5202	  	16.3317	  	12.5486	  	10.0607	  	7.0860	  	5.4162	  	3.6304	  	2.6813	  	1.5050	  	0.9436	  	0.6191
	 December 15, 2010
	  	21.0002	  	20.4402	  	18.8679	  	17.4310	  	15.2553	  	11.3782	  	8.9100	  	6.0889	  	4.5871	  	3.0527	  	2.2593	  	1.2790	  	0.8067	  	0.5310
	 December 15, 2011
	  	21.0002	  	20.4402	  	18.8679	  	16.1758	  	13.8765	  	9.8910	  	7.4695	  	4.8794	  	3.6081	  	2.3903	  	1.7783	  	1.0180	  	0.6467	  	0.4274
	 December 15, 2012
	  	21.0002	  	20.4402	  	17.5776	  	14.4261	  	11.9700	  	7.8890	  	5.5925	  	3.4027	  	2.4687	  	1.6490	  	1.2402	  	0.7189	  	0.4603	  	0.3060
	 December 15, 2013
	  	21.0002	  	19.9495	  	15.2623	  	11.7041	  	9.0280	  	4.9536	  	3.0367	  	1.6548	  	1.2198	  	0.8511	  	0.6483	  	0.3792	  	0.2447	  	0.1640
	 December 15, 2014
	  	21.0002	  	18.7171	  	12.3069	  	6.8124	  	2.0505	  	0.0000	  	0.0000	  	0.0000	  	0.0000	  	0.0000	  	0.0000	  	0.0000	  	0.0000	  	0.0000

  

 Sch. A-1 

 SCHEDULE B 
 Church & Tower, Inc. 
 Direct Star TV, LLC 
 GlobeTec Construction, LLC 
 MasTec Brazil I, Inc.

 MasTec Brazil II, Inc. 
 MasTec
Contracting Company, Inc. 
 MasTec Latin America, Inc. 
 MasTec North America, Inc. 
 MasTec North America AC, LLC 
 MasTec Property Holdings, LLC 
 MasTec Residential
Services, LLC. 
 MasTec Services Company, Inc. 
 MasTec Spain, Inc. 
 MasTec Venezuela, Inc. 
 Nsoro MasTec, LLC 
 Nsoro MasTec International, Inc. 
 Power Partners MasTec, LLC 
 Pumpco, Inc.

 Three Phase Line Construction, Inc. 
 Three Phase Acquisition Corp. 
 Wanzek Construction, Inc. 
  

 Sch. B-1 

 EXHIBIT A 
 [FORM OF FACE OF NOTE] 
 [Include only for Global Notes] 
 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. 
 [Restricted Note Legend] 
 THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE SECURITIES ACT ), AND THIS SECURITY MAY
NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. EACH PURCHASER OF THIS SECURITY IS HEREBY NOTIFIED THAT THE SELLER OF THIS SECURITY MAY BE RELYING ON THE EXEMPTION FROM THE
PROVISIONS OF SECTION 5 OF THE SECURITIES ACT PROVIDED BY RULE 144A THEREUNDER. 
 THE HOLDER OF THIS SECURITY AGREES FOR THE BENEFIT OF THE
COMPANY THAT (A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) TO A PERSON WHOM THE SELLER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER (AS DEFINED IN RULE 144A UNDER THE SECURITIES ACT) IN A
TRANSACTION MEETING THE REQUIREMENTS OF RULE 144A, (II) PURSUANT TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, INCLUDING THE EXEMPTION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), SUBJECT TO THE
ISSUER’S AND THE TRUSTEE’S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER PURSUANT TO THIS CLAUSE (II) TO REQUIRE THE DELIVERY OF AN OPINION OF COUNSEL, CERTIFICATION AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM THAT ANY SUCH
EXEMPTION IS AVAILABLE TO THE HOLDER, (III) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR (IV) TO THE COMPANY OR ANY OF ITS SUBSIDIARIES, IN EACH OF CASES (I) THROUGH (IV) IN ACCORDANCE WITH ANY APPLICABLE
SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY SUBSEQUENT PURCHASER OF THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE.

  

 A-1 

 MasTec, Inc. 
 4.25% Senior Convertible Notes due 2014 
  

			
	No.             	  	 $                    

  

									
	 CUSIP No. 576323 AH2
	 		 		  	ISIN No. US576323AH26	  	

 MasTec, Inc., a Florida corporation (herein called the “Company,”
which term includes any successor corporation under the Indenture referred to on the reverse hereof), for value received hereby promises to pay to [CEDE & CO.], or registered assigns (the “Depositary”), the principal sum of
[            ] ($[            ]) or such other principal amount as shall be set forth on the Schedule I hereto on
December 15, 2014, unless earlier converted or repurchased. The Company’s obligations under this Security are fully and unconditionally guaranteed, jointly and severally, by the Guarantors. 
 This Security shall bear interest at the rate of 4.25% per year from November 10, 2009, or from the most recent date to which
interest had been paid or provided. Except as otherwise provided in the Indenture, interest is payable semi-annually in arrears on each June 15 and December 15, commencing June 15, 2010, to Holders of record at the Close of Business
on the preceding June 1 and December 1, respectively. Interest payable on each Interest Payment Date shall equal the amount of interest accrued from, and including the immediately preceding Interest Payment Date (or from and including
November 10, 2009, if no interest has been paid hereon) to but excluding such Interest Payment Date. To the extent lawful, payments of principal or interest (including Additional Interest and Filing Additional Interest, if any) on the
Securities that are not made when due will accrue interest at the annual rate of 1.0% above the then applicable interest rate borne by the Securities from the required payment date in accordance with the provisions of the Indenture. 
 Payment of the principal and interest, on this Security will be made at the office or agency of the Company maintained for that purpose in
the Borough of Manhattan, City of New York, or elsewhere as provided in the Indenture, in such coin or currency of the United States of America as at the time of payment is legal tender for payment of public and private debts; provided,
however, that at the option of the Company, payment of interest, may be made by (i) check mailed to the address of the Person entitled thereto as such address shall appear in the Security Register or (ii) wire transfer to an account
of the Person entitled thereto located inside the United States; provided further, however, that, with respect to any Holder of Securities with an aggregate principal amount in excess of $2,000,000, at the application of such Holder in
writing to the Company, interest on such Holder’s Securities shall be paid by wire transfer in immediately available funds to such Holder’s account in the United States supplied by such Holder from time to time to the Trustee and Paying
Agent (if different from the Trustee) not later than the applicable Record Date. Notwithstanding the foregoing, payment of interest in respect of Securities held in global form shall be made in accordance with procedures required by the Depositary.

 Reference is made to the further provisions of this Security set forth on the reverse hereof, including, without limitation,
provisions giving the Holder of this Security the right to convert this Security into Common Stock on the terms and subject to the

  

 Exh. A-1 

 
limitations referred to on the reverse hereof and as more fully specified in the Indenture. Such further provisions shall for all purposes have the same effect as though fully set forth at this
place. 
 This Security shall be governed by and construed in accordance with the laws of the State of New York. 
 This Security shall not be valid or become obligatory for any purpose until the certificate of authentication hereon shall have been
manually signed by the Trustee or a duly authorized authenticating agent under the Indenture. 
 [Remainder of page intentionally
left blank] 
  

 Exh. A-2 

 IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed by the
undersigned officer. 
  

					
	MASTEC, INC.
		
	By:	 	  

		 	Name:	 	[            ]
		 	Title:	 	[            ]

  

					
	Attest
		
	 By:
	 	  

		 	 Name:
	 	[            ]
		 	 Title:
	 	Secretary

 Dated: [            ],
20[    ] 
  

 Exh. A-3 

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION: 
 This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture. 
  

			
	U.S. BANK NATIONAL ASSOCIATION,
	as trustee
		
	BY:	 	  

		 	Authorized Officer

  

 Exh. A-4 

 [FORM OF REVERSE OF NOTE] 
 MasTec, Inc. 
 4.25% Senior Convertible Notes due 2014

 This Security is one of a duly authorized issue of Securities of the Company, designated as its 4.25% Senior Convertible
Notes due 2014 (herein called the “Securities”), issued under and pursuant to an Indenture dated as of June 5, 2009 (herein called the “Base Indenture”), as supplemented by the Second Supplemental Indenture,
dated as of November 10, 2009 (as so supplemented, herein called the “Indenture”), between the Company, the Guarantors listed in Schedule B to the Supplemental Indenture and U.S. Bank National Association (herein called the
“Trustee”), to which Indenture and all indentures supplemental thereto reference is hereby made for a description of the rights, limitations of rights, obligations, duties and immunities thereunder of the Trustee, the Company, the
Guarantors and the Holders of the Securities. Additional Securities may be issued in an unlimited aggregate principal amount, subject to certain conditions specified in the Indenture. Capitalized terms used but not defined in this Security shall
have the meanings ascribed to them in the Indenture. 
 The Company’s obligations under this Security are fully and
unconditionally guaranteed, jointly and severally, by the Guarantors. 
 In case an Event of Default, as defined in the
Indenture, shall have occurred and be continuing, the principal of and interest on all Securities may be declared, and upon said declaration shall become, due and payable, in the manner, with the effect and subject to the conditions provided in the
Indenture. 
 Subject to the terms and conditions of the Indenture, the Company will make all payments and deliveries in respect
of the Fundamental Change Repurchase Price and the principal amount on the Maturity Date, as the case may be, to the Holder who surrenders a Security to a Paying Agent to collect such payments in respect of the Security. The Company will pay cash
amounts in money of the United States that at the time of payment is legal tender for payment of public and private debts. 
 The Indenture contains provisions permitting the Company and the Trustee in certain circumstances, without the consent of the Holders of the Securities, and in other circumstances, with the consent of the Holders of not less than a majority
in principal amount of the Securities at the time Outstanding, evidenced as in the Indenture provided, to execute supplemental indentures adding any provisions to or changing in any manner or eliminating any of the provisions of the Indenture or of
any supplemental indenture or modifying in any manner the rights of the Holders of the Securities; provided, however, that no such supplemental indenture shall make any of the changes set forth in Section 6.02 of the Supplemental
Indenture and Section 902 of the Base Indenture, without the consent of each Holder of an Outstanding Security affected thereby. It is also provided in the Indenture that, prior to any declaration accelerating the maturity of the Securities,
the Holders of a majority in principal amount of the Securities at the time Outstanding may on behalf of the Holders of all of the Securities waive any past default or Event of Default under the Indenture and its consequences except as provided in
the Indenture. Any such consent or waiver by the Holder of this Security (unless revoked as provided in the

  

 Exh. A-5 

 
Indenture) shall be conclusive and binding upon such Holder and upon all future Holders and owners of this Security and any Securities which may be issued in exchange or substitution hereof,
irrespective of whether or not any notation thereof is made upon this Security or such other Securities. 
 No reference herein
to the Indenture and no provision of this Security or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and accrued and unpaid interest on this Security at the place,
at the respective times, at the rate and in the lawful money herein prescribed. 
 The Securities are issuable in registered
form without coupons in denominations of $1,000 principal amount and integral multiples thereof. At the office or agency of the Company referred to on the face hereof, and in the manner and subject to the limitations provided in the Indenture,
without payment of any service charge but with payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any registration of transfer or exchange of Securities (except as otherwise provided in
the Base Indenture), Securities may be exchanged for a like aggregate principal amount of Securities of other authorized denominations. 
 The Securities are not subject to redemption and will not be entitled to the benefit of any sinking fund. 
 Upon the occurrence of a Fundamental Change, the Holder has the right, at such Holder’s option, to require the Company to repurchase all of such Holder’s Securities or any portion thereof (in
principal amounts of $1,000 or integral multiples thereof) in accordance with the provisions of the Indenture on the Fundamental Change Repurchase Date at a price equal to 100% of the principal amount of the Securities such holder elects to require
the Company to repurchase, together with accrued and unpaid interest (including Additional Interest and Filing Additional Interest, if any) to but excluding the Fundamental Change Repurchase Date, except as otherwise provided in the Indenture. The
Company shall mail to all Holders of record of the Securities a notice of the occurrence of a Fundamental Change and of the repurchase right arising as a result thereof at any time following the Company entering into a definitive agreement that, if
consummated, would give rise to a Fundamental Change, but in any event not later than the fifth (5th) calendar day after the occurrence of a Fundamental Change. 
 Subject to and upon compliance with the provisions of the Indenture, the Holder may surrender for conversion all or any portion of this Security that is in an integral multiple of $1,000. Upon conversion,
the Holder shall be entitled to receive the consideration specified in the Indenture. No fractional share of Common Stock shall be issued upon conversion of a Security. Instead, the Company shall pay cash in lieu of such fractional share of Common
Stock as provided in the Indenture. The initial Conversion Rate shall be 64.6162 shares of Common Stock per $1,000 principal amount of Securities, subject to adjustment in accordance with the provisions of the Indenture. If a Holder converts all or
a part of this Security in connection with the occurrence of certain Fundamental Change transactions, the Conversion Rate shall be increased in the manner and to the extent described in the Indenture. 
  

 Exh. A-6 

 Upon due presentment for registration of transfer of this Security at the office or agency
of the Company in the Borough of Manhattan, City of New York, a new Security or Securities of authorized denominations for an equal aggregate principal amount will be issued to the transferee in exchange thereof, subject to the limitations provided
in the Indenture, without charge except for any tax, assessments or other governmental charge imposed in connection with any registration of transfer or exchange of Securities (except as otherwise set forth in the Base Indenture). 
 The Company, the Trustee, any authenticating agent, any Paying Agent, any Conversion Agent and any Security Registrar may deem and treat the
registered Holder hereof as the absolute owner of this Security (whether or not this Security shall be overdue and notwithstanding any notation of ownership or other writing hereon), for the purpose of receiving payment hereof, or on account hereof,
for the conversion hereof and for all other purposes, and neither the Company nor the Trustee nor any other authenticating agent nor any Paying Agent nor any other Conversion Agent nor any Security Registrar shall be affected by any notice to the
contrary. All payments made to or upon the order of such registered Holder shall, to the extent of the sum or sums paid, satisfy and discharge liability for monies payable on this Security. 
 Customary abbreviations may be used in the name of a Holder or an assignee, such as TEN COM (=tenants in common), TENANT (=tenants by the
entireties), JT TEN (=joint tenants with right of survivorship and not as tenants in common), CUST (=custodian), and U/G/M/A (=Uniform gift to Minors Act). 
  

 Exh. A-7 

 Schedule I 
 MasTec, Inc. 
 4.25% Senior Convertible Notes due 2014

 No.
                    
  

							
	 Date
	 	 Principal Amount
	 	 Notation Explaining
Principal Amount
 Recorded
	 	 Authorized
 Signature of Trustee
 or Custodian

  

 Exh. A-8 

 EXHIBIT B 
 FORM OF CONVERSION NOTICE 
 To: MasTec, Inc. 
 The undersigned registered owner of this Security hereby exercises the option to convert this Security, or the portion hereof (which is
$1,000 principal amount or an integral multiple thereof) below designated into shares of Common Stock in accordance with the terms of the Indenture referred to in this Security, and directs that the shares of Common Stock issuable and deliverable
upon such conversion, together with any check in payment for fractional shares of Common Stock, and any Securities representing any unconverted principal amount hereof, be issued and delivered to the registered holder hereof unless a different name
has been indicated below. If shares or any portion of this Security not converted are to be issued in the name of a person other than the undersigned, the undersigned will pay all transfer taxes and duties payable with respect thereto. Any amount
required to be paid to the undersigned on account of interest accompanies this Security. 
  

			
	 Dated:
                                
  
	  	 
	 	  	 Signature(s)
  

	 	 
	 	  	 
	 Signature Guarantee
  
	  	 

  

			
	Signature(s) must be guaranteed by an eligible Guarantor Institution (banks, stock brokers, savings and loan associations and credit unions) with membership in an approved signature
guarantee medallion program pursuant to Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended, if shares of Common Stock is to be issued, or Securities to be delivered, other than to and in the name of the registered
holder.	 	

  

 Exh. B-1 

			
	Fill in for registration of shares of Common Stock if to be issued, and Securities if to be delivered, other than to and in the name of the registered holder:	 	

  

					
	 (Name)
  
	 	 	  	 
	 	 	 
	 	 	 	  	 
	 (Street
Address)
  
	 	 	  	 
	 	 	 
	 	 	 	  	 
	 (City, State
and Zip Code)
  
	 	 	  	 
	 	 	 
	 	 	 	  	 
	 Please print
name and address
  
	 	 	  	 

  

			
	 	 	 Principal
amount to be converted (if less than all): $        ,000
  

	 	 
	 	 	 
	 	 
	 	 	 
	 	 	 Social Security or Other Taxpayer
Identification Number
  

  

 Exh. B-2 

 EXHIBIT C 
 FORM OF FUNDAMENTAL CHANGE REPURCHASE NOTICE 
 To: MasTec, Inc. 
 The undersigned registered owner of this Security hereby acknowledges receipt of a notice from MasTec, Inc. (the “Company”)
as to the occurrence of a Fundamental Change with respect to the Company and requests and instructs the Company to repay the entire principal amount of this Security, or the portion thereof (which is $1,000 principal amount or an integral multiple
thereof) below designated, in accordance with the terms of the Indenture referred to in this Security, to the registered holder hereof. 
  

			
	 Dated:
                                
  
	  	 
	 	 
	 	  	 
	 	  	 Signature(s)
  

	 	 
	 	  	 
	 	  	 Social Security or Other Taxpayer
Identification Number Principal amount to be repaid (if less than all): $        ,000 NOTICE:
 The above
signatures of the holder(s) hereof must correspond with the name as written upon the face of the Security in every particular without alteration or enlargement or any change whatever.
  

  

 Exh. C-1 

 EXHIBIT D 
 FORM OF ASSIGNMENT AND TRANSFER 
 For value received
                             hereby sell(s), assign(s) and transfer(s) unto
                             (Please insert social security or Taxpayer Identification Number of assignee)
the within Security, and hereby irrevocably constitutes and appoints                              attorney to
transfer the said Security on the books of the Company, with full power of substitution in the premises. 
 In connection with
any transfer of the Notes prior to the Resale Restriction Termination Date of the original issuance of the Notes, the undersigned confirms that such Notes are being transferred: 
  

			
	 ̈	 	To MasTec, Inc. or a subsidiary thereof; or
		
	 ̈	 	To a “qualified institutional buyer” in compliance with Rule 144A under the Securities Act of 1933, as amended; or
		
	 ̈	 	Pursuant to and in compliance with Rule 144 under the Securities Act of 1933, as amended; or
		
	 ̈	 	Pursuant to a Registration Statement which has been declared effective under the Securities Act of 1933, as amended, and which continues to be effective at the time of transfer;

 and unless the Notes has been transferred to MasTec, Inc. or a subsidiary thereof, the undersigned
confirms that such Notes are not being transferred to an “affiliate” of the Company as defined in Rule 144 under the Securities Act of 1933, as amended. 
 Capitalized terms used but not defined herein shall have the respective meanings assigned to them in the Second Supplemental Indenture among MasTec, Inc., U.S. Bank National Association, as Trustee, and
the Guarantors named therein. 
 Unless one of the boxes is checked, the Trustee shall refuse to register any of the Notes evidenced by this
certificate in the name of any person other than the registered holder thereof. 
  

			
	Dated:
                                	 	 
	 	 
	 	 	 
	 	 
	 	 	 
	 Signature(s)

  
	 	 
	 	 
	 	 	 
	Signature Guarantee	 	 

  

			
	Signature(s) must be guaranteed by an eligible Guarantor Institution (banks, stock brokers, savings and loan associations and credit unions) with membership in an approved signature
guarantee medallion program pursuant to Rule 17Ad-15 under the Securities Exchange Act of 1934, as amended, if Common Stock is to be issued, or Securities to be delivered, other than to and in the name of the registered holder.	  	

  

 Exh. D-1 

 NOTICE: The signature on the conversion notice, the option to elect repurchase upon a Fundamental Change, or
the assignment must correspond with the name as written upon the face of the Security in every particular without alteration or enlargement or any change whatever. 
  

 Exh. B-2 

 EXHIBIT E 
 THIS SECURITY (OR ITS PREDECESSOR) WAS ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE SECURITIES ACT ), AND THIS SECURITY MAY
NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM. 
 THE HOLDER OF THIS
SECURITY AGREES FOR THE BENEFIT OF THE COMPANY THAT (A) THIS SECURITY MAY BE OFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED, ONLY (I) PURSUANT TO AN EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT, INCLUDING THE
EXEMPTION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT (IF AVAILABLE), SUBJECT TO THE ISSUER’S AND THE TRUSTEE’S RIGHT PRIOR TO ANY SUCH OFFER, SALE OR TRANSFER PURSUANT TO THIS CLAUSE (I) TO REQUIRE THE DELIVERY OF AN OPINION OF
COUNSEL, CERTIFICATION AND/OR OTHER INFORMATION SATISFACTORY TO EACH OF THEM THAT ANY SUCH EXEMPTION IS AVAILABLE TO THE HOLDER, (II) PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR (III) TO THE COMPANY OR ANY OF ITS
SUBSIDIARIES, IN EACH OF CASES (I) THROUGH (III) IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES, AND (B) THE HOLDER WILL, AND EACH SUBSEQUENT HOLDER IS REQUIRED TO, NOTIFY ANY SUBSEQUENT PURCHASER OF
THIS SECURITY FROM IT OF THE RESALE RESTRICTIONS REFERRED TO IN (A) ABOVE. 
  

 Exh. E-1

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