Document:

EX-4.3

 Exhibit 4.3 
  

 
  

TWITTER, INC. 
 AND

U.S. BANK NATIONAL ASSOCIATION,

as Trustee 
 INDENTURE

Dated as of September 17, 2014 

1.00% Convertible Senior Notes due 2021 
  

 
  

 TABLE OF CONTENTS 

 
  

							
	 	 	 	  	PAGE	 
		 	ARTICLE 1	  			
		 	DEFINITIONS	  			
			
	Section 1.01.	 	Definitions	  	 	1	 
	Section 1.02.	 	References to Interest	  	 	12	 
			
		 	ARTICLE 2	  			
		 	ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES	  			
			
	Section 2.01.	 	Designation and Amount	  	 	12	 
	Section 2.02.	 	Form of Notes	  	 	12	 
	Section 2.03.	 	Date and Denomination of Notes; Payments of Interest and Defaulted Amounts	  	 	13	 
	Section 2.04.	 	Execution, Authentication and Delivery of Notes	  	 	15	 
	Section 2.05.	 	Exchange and Registration of Transfer of Notes; Restrictions on Transfer; Depositary	  	 	15	 
	Section 2.06.	 	Mutilated, Destroyed, Lost or Stolen Notes	  	 	21	 
	Section 2.07.	 	Temporary Notes	  	 	22	 
	Section 2.08.	 	Cancellation of Notes Paid, Converted, Etc	  	 	23	 
	Section 2.09.	 	CUSIP Numbers	  	 	23	 
	Section 2.10.	 	Additional Notes; Repurchases	  	 	23	 
			
		 	ARTICLE 3	  			
		 	SATISFACTION AND DISCHARGE	  			
			
	Section 3.01.	 	Satisfaction and Discharge	  	 	23	 
			
		 	ARTICLE 4	  			
		 	PARTICULAR COVENANTS OF THE COMPANY	  			
			
	Section 4.01.	 	Payment of Principal and Interest	  	 	24	 
	Section 4.02.	 	Maintenance of Office or Agency	  	 	24	 
	Section 4.03.	 	Appointments to Fill Vacancies in Trustee’s Office	  	 	25	 
	Section 4.04.	 	Provisions as to Paying Agent	  	 	25	 
	Section 4.05.	 	Existence	  	 	26	 
	Section 4.06.	 	Rule 144A Information Requirement and Annual Reports	  	 	26	 
	Section 4.07.	 	Stay, Extension and Usury Laws	  	 	28	 
	Section 4.08.	 	Compliance Certificate; Statements as to Defaults	  	 	28	 
	Section 4.09.	 	Further Instruments and Acts	  	 	29	 

  
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		 	ARTICLE 5	  			
		 	LISTS OF HOLDERS AND REPORTS BY THE COMPANY AND THE
TRUSTEE	  			
			
	Section 5.01.	 	Lists of Holders	  	 	29	 
	Section 5.02.	 	Preservation and Disclosure of Lists	  	 	29	 
			
		 	ARTICLE 6	  			
		 	DEFAULTS AND REMEDIES	  			
			
	Section 6.01.	 	Events of Default	  	 	29	 
	Section 6.02.	 	Acceleration; Rescission and Annulment	  	 	30	 
	Section 6.03.	 	Additional Interest	  	 	31	 
	Section 6.04.	 	Payments of Notes on Default; Suit Therefor	  	 	32	 
	Section 6.05.	 	Application of Monies Collected by Trustee	  	 	34	 
	Section 6.06.	 	Proceedings by Holders	  	 	34	 
	Section 6.07.	 	Proceedings by Trustee	  	 	35	 
	Section 6.08.	 	Remedies Cumulative and Continuing	  	 	35	 
	Section 6.09.	 	Direction of Proceedings and Waiver of Defaults by Majority of Holders	  	 	36	 
	Section 6.10.	 	Notice of Defaults	  	 	36	 
	Section 6.11.	 	Undertaking to Pay Costs	  	 	36	 
			
		 	ARTICLE 7	  			
		 	CONCERNING THE TRUSTEE	  			
			
	Section 7.01.	 	Duties and Responsibilities of Trustee	  	 	37	 
	Section 7.02.	 	Reliance on Documents, Opinions, Etc	  	 	39	 
	Section 7.03.	 	No Responsibility for Recitals, Etc	  	 	40	 
	Section 7.04.	 	Trustee, Paying Agents, Conversion Agents, Bid Solicitation Agent or Note Registrar May Own Notes	  	 	40	 
	Section 7.05.	 	Monies and Shares of Common Stock to Be Held in Trust	  	 	40	 
	Section 7.06.	 	Compensation and Expenses of Trustee	  	 	41	 
	Section 7.07.	 	Officer’s Certificate as Evidence	  	 	41	 
	Section 7.08.	 	Eligibility of Trustee	  	 	42	 
	Section 7.09.	 	Resignation or Removal of Trustee	  	 	42	 
	Section 7.10.	 	Acceptance by Successor Trustee	  	 	43	 
	Section 7.11.	 	Succession by Merger, Etc	  	 	43	 
	Section 7.12.	 	Trustee’s Application for Instructions from the Company	  	 	44	 
			
		 	ARTICLE 8	  			
		 	CONCERNING THE HOLDERS	  			
			
	Section 8.01.	 	Action by Holders	  	 	44	 
	Section 8.02.	 	Proof of Execution by Holders	  	 	45	 
	Section 8.03.	 	Who Are Deemed Absolute Owners	  	 	45	 
	Section 8.04.	 	Company-Owned Notes Disregarded	  	 	45	 
	Section 8.05.	 	Revocation of Consents; Future Holders Bound	  	 	46	 

  
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		  	ARTICLE 9	  	
		  	HOLDERS’ MEETINGS	  	
			
	Section 9.01.	  	Purpose of Meetings	  	46
	Section 9.02.	  	Call of Meetings by Trustee	  	46
	Section 9.03.	  	Call of Meetings by Company or Holders	  	47
	Section 9.04.	  	Qualifications for Voting	  	47
	Section 9.05.	  	Regulations	  	47
	Section 9.06.	  	Voting	  	48
	Section 9.07.	  	No Delay of Rights by Meeting	  	48
			
		  	ARTICLE 10	  	
		  	SUPPLEMENTAL INDENTURES	  	
			
	Section 10.01.	  	Supplemental Indentures Without Consent of Holders	  	48
	Section 10.02.	  	Supplemental Indentures with Consent of Holders	  	49
	Section 10.03.	  	Effect of Supplemental Indentures	  	50
	Section 10.04.	  	Notation on Notes	  	51
	Section 10.05.	  	Evidence of Compliance of Supplemental Indenture to Be Furnished Trustee	  	51
			
		  	ARTICLE 11	  	
		  	CONSOLIDATION, MERGER, SALE, CONVEYANCE AND LEASE	  	
			
	Section 11.01.	  	Company May Consolidate, Etc. on Certain Terms	  	51
	Section 11.02.	  	Successor Corporation to Be Substituted	  	51
	Section 11.03.	  	Officer’s Certification and Opinion of Counsel to Be Given to Trustee	  	52
			
		  	ARTICLE 12	  	
		  	IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS	  	
			
	Section 12.01.	  	Indenture and Notes Solely Corporate Obligations	  	52
			
		  	ARTICLE 13	  	
		  	CONVERSION OF NOTES	  	
			
	Section 13.01.	  	Conversion Privilege	  	53
	Section 13.02.	  	Conversion Procedure; Settlement Upon Conversion	  	56
	Section 13.03.	  	Increased Conversion Rate Applicable to Certain Notes Surrendered in Connection with Make-Whole Fundamental Changes	  	60
	Section 13.04.	  	Adjustment of Conversion Rate	  	62
	Section 13.05.	  	Adjustments of Prices	  	71
	Section 13.06.	  	Shares to Be Fully Paid	  	71
	Section 13.07.	  	Effect of Recapitalizations, Reclassifications and Changes of the Common Stock	  	71
	Section 13.08.	  	Certain Covenants	  	73
	Section 13.09.	  	Responsibility of Trustee	  	74

  
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	Section 13.10.	  	Notice to Holders Prior to Certain Actions	  	74
	Section 13.11.	  	Stockholder Rights Plans	  	75
	Section 13.12.	  	Limit on Issuance of Shares of Common Stock Upon Conversion	  	75
	Section 13.13.	  	Exchange in Lieu of Conversion	  	75
			
		  	ARTICLE 14	  	
		  	REPURCHASE OF NOTES AT OPTION OF HOLDERS	  	
			
	Section 14.01.	  	Intentionally Omitted	  	76
	Section 14.02.	  	Repurchase at Option of Holders Upon a Fundamental Change	  	76
	Section 14.03.	  	Withdrawal of Fundamental Change Repurchase Notice	  	79
	Section 14.04.	  	Deposit of Fundamental Change Repurchase Price	  	79
	Section 14.05.	  	Covenant to Comply with Applicable Laws Upon Repurchase of Notes	  	80
			
		  	ARTICLE 15	  	
		  	NO OPTIONAL REDEMPTION	  	
			
	Section 15.01.	  	No Optional Redemption	  	80
			
		  	ARTICLE 16	  	
		  	MISCELLANEOUS PROVISIONS	  	
			
	Section 16.01.	  	Provisions Binding on Company’s Successors	  	80
	Section 16.02.	  	Official Acts by Successor Corporation	  	80
	Section 16.03.	  	Addresses for Notices, Etc	  	81
	Section 16.04.	  	Governing Law; Jurisdiction	  	81
	Section 16.05.	  	Evidence of Compliance with Conditions Precedent; Certificates and Opinions of Counsel to Trustee	  	82
	Section 16.06.	  	Legal Holidays	  	82
	Section 16.07.	  	No Security Interest Created	  	82
	Section 16.08.	  	Benefits of Indenture	  	83
	Section 16.09.	  	Table of Contents, Headings, Etc	  	83
	Section 16.10.	  	Authenticating Agent	  	83
	Section 16.11.	  	Execution in Counterparts	  	84
	Section 16.12.	  	Severability	  	84
	Section 16.13.	  	Waiver of Jury Trial	  	84
	Section 16.14.	  	Force Majeure	  	84
	Section 16.15.	  	Calculations	  	84
	Section 16.16.	  	U.S.A. Patriot Act	  	85
			
		  	EXHIBIT	  	
			
	Exhibit A	  	Form of Note	  	A-1

  
 iv 

 INDENTURE, dated as of September 17, 2014, between TWITTER, INC., a Delaware corporation, as
issuer (the “Company”, as more fully set forth in Section 1.01) and U.S. BANK NATIONAL ASSOCIATION, a national banking association, as trustee (the “Trustee”, as more fully set forth in Section 1.01). 

W I T N E S S E T H: 
 WHEREAS,
for its lawful corporate purposes, the Company has duly authorized the issuance of its 1.00% Convertible Senior Notes due 2021 (the “Notes”), initially in an aggregate principal amount not to exceed $900,000,000 (as increased by an
amount of up to $100,000,000 principal amount of any additional Notes purchased by the Initial Purchasers pursuant to the exercise of their over-allotment option as set forth in the Purchase Agreement), and in order to provide the terms and
conditions upon which the Notes are to be authenticated, issued and delivered, the Company has duly authorized the execution and delivery of this Indenture; and 

WHEREAS, the Form of Note, the certificate of authentication to be borne by each Note, the Form of Notice of Conversion, the Form of
Fundamental Change Repurchase Notice and the Form of Assignment and Transfer to be borne by the Notes are to be substantially in the forms hereinafter provided; and 

WHEREAS, all acts and things necessary to make the Notes, when executed by the Company and authenticated and delivered by the Trustee or a
duly authorized authenticating agent, as in this Indenture provided, the valid, binding and legal obligations of the Company, and this Indenture a valid agreement according to its terms, have been done and performed, and the execution of this
Indenture and the issuance hereunder of the Notes have in all respects been duly authorized. 
 NOW, THEREFORE, THIS INDENTURE WITNESSETH:

 That in order to declare the terms and conditions upon which the Notes are, and are to be, authenticated, issued and delivered, and in
consideration of the premises and of the purchase and acceptance of the Notes by the Holders thereof, the Company covenants and agrees with the Trustee for the equal and proportionate benefit of the respective Holders from time to time of the Notes
(except as otherwise provided below), as follows: 
 ARTICLE 1 

DEFINITIONS 

Section 1.01. Definitions. The terms defined in this Section 1.01 (except as herein otherwise expressly provided or unless
the context otherwise requires) for all purposes of this Indenture and of any indenture supplemental hereto shall have the respective meanings specified in this Section 1.01. The words “herein,” “hereof,”
“hereunder,” and words of similar import refer to this 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” means all amounts, if any, payable pursuant to
Section 4.06(d), Section 4.06(e) and Section 6.03, as applicable. 
 “Additional Shares” shall have the
meaning specified in Section 13.03(a). 
 “Affiliate” of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common control with such specified Person. For the purposes of this definition, “control,” when used with respect to any specified Person means the power to direct or
cause the direction of the management and policies of such Person, directly or indirectly, whether through the ownership of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” have meanings
correlative to the foregoing. 
 “Bid Solicitation Agent” means the Company or the Person appointed by the Company to
solicit bids for the Trading Price of the Notes in accordance with Section 13.01(b)(i). The Trustee shall initially act as the Bid Solicitation Agent. 

“Board of Directors” means the board of directors of the Company or a committee of such board duly authorized to act for it
hereunder. 
 “Board Resolution” means a copy of a resolution certified by the Secretary or an Assistant Secretary of the
Company to have been duly adopted by the Board of Directors, and to be in full force and effect on the date of such certification, and delivered to the Trustee. 

“Business Day” means, with respect to any Note, any day other than a Saturday, a Sunday or a day on which the Federal Reserve
Bank of New York is authorized or required by law or executive order to close or be closed. 
 “Capital Stock” means, for
any entity, any and all shares, interests, rights to purchase, warrants, options, participations or other equivalents of or interests in (however designated) stock issued by that entity. 

“Cash Settlement” shall have the meaning specified in Section 13.02(a). 

“Clause A Distribution” shall have the meaning specified in Section 13.04(c). 

“Clause B Distribution” shall have the meaning specified in Section 13.04(c). 

“Clause C Distribution” shall have the meaning specified in Section 13.04(c). 

“close of business” means 5:00 p.m. (New York City time). 

“Combination Settlement” shall have the meaning specified in Section 13.02(a). 

“Commission” means the U.S. Securities and Exchange Commission. 

“Common Equity” of any Person means Capital Stock of such Person that is generally entitled (a) to vote in the election
of directors of such Person or (b) if such Person is not a corporation, to vote or otherwise participate in the selection of the governing body, partners, managers or others that will control the management or policies of such Person. 

  
 2 

 “Common Stock” means the common stock of the Company, par value $0.000005 per
share, at the date of this Indenture, subject to Section 13.07. 
 “Company” shall have the meaning specified in the
first paragraph of this Indenture, and subject to the provisions of Article 11, shall include its successors and assigns. 

“Company Order” means a written order of the Company, signed by the Company’s Chief Executive Officer, Chief Financial
Officer, President, Executive or Senior Vice President or any Vice President (whether or not designated by a number or numbers or word or words added before or after the title “Vice President”), Treasurer or Assistant Treasurer or
Secretary or any Assistant Secretary, and delivered to the Trustee. 
 “Conversion Agent” shall have the meaning specified
in Section 4.02. 
 “Conversion Date” shall have the meaning specified in Section 13.02(c). 

“Conversion Obligation” shall have the meaning specified in Section 13.01(a). 

“Conversion Price” means as of any time, $1,000, divided by the Conversion Rate as of such time. 

“Conversion Rate” shall have the meaning specified in Section 13.01(a). 

“Corporate Trust Office” means the designated office of the Trustee at which at any time its corporate trust business shall
be administered, which office at the date hereof is located at 633 West Fifth Street, 24th Floor, Los Angeles, California, 90071, Attention: Global Corporate Trust Services (Twitter, Inc. 1.00%
Convertible Senior Notes due 2021), or such other address as the Trustee may designate from time to time by notice to the Holders and the Company, or the designated corporate trust office of any successor trustee (or such other address as such
successor trustee may designate from time to time by notice to the Holders and the Company). 
 “Custodian” means the
Trustee, as custodian for The Depository Trust Company, with respect to the Global Notes, or any successor entity appointed by the Company as custodian for the Depositary under this Indenture. 

“Daily Conversion Value” means, for each of the 30 consecutive Trading Days during the Observation Period, one-thirtieth
(1/30) of the product of (a) the Conversion Rate on such Trading Day and (b) the Daily VWAP for such Trading Day. 

“Daily Measurement Value” means the Specified Dollar Amount (if any), divided by 30. 

  
 3 

 “Daily Settlement Amount,” for each of the 30 consecutive Trading Days during
the Observation Period, shall consist of: 
 (a) cash in an amount equal to the lesser of (i) the Daily Measurement
Value and (ii) the Daily Conversion Value on such Trading Day; and 
 (b) if the Daily Conversion Value on such Trading
Day exceeds the Daily Measurement Value, a number of shares of Common Stock equal to (i) the difference between the Daily Conversion Value and the Daily Measurement Value, divided by (ii) the Daily VWAP for such Trading Day. 

“Daily VWAP” means, for each of the 30 consecutive Trading Days during the relevant Observation Period, the per share
volume-weighted average price as displayed under the heading “Bloomberg VWAP” on Bloomberg page “TWTR <equity> AQR” (or its equivalent successor if such Bloomberg page is not available) in respect of the period from the
scheduled open of trading until the scheduled close of trading of the primary trading session on such Trading Day (or if such volume-weighted average price is unavailable, the market value of one share of the Common Stock on such Trading Day
reasonably determined, using a volume-weighted average method, by a nationally recognized independent investment banking firm retained for this purpose by the Company). The “Daily VWAP” shall be determined without regard to
after-hours trading or any other trading outside of the regular trading session trading hours. 
 “Default” means any event
that is, or after notice or passage of time, or both, would be, an Event of Default. 
 “Defaulted Amounts” means any
amounts on any Note (including, without limitation, the Fundamental Change Repurchase Price, principal and interest) that are payable but are not punctually paid or duly provided for. 

“Depositary” means, with respect to each Global Note, the Person specified in Section 2.05(c) as the Depositary with
respect to such Notes, until a successor shall have been appointed and become such pursuant to the applicable provisions of this Indenture, and thereafter, “Depositary” shall mean or include such successor. 

“Designated Institution” shall have the meaning specified in Section 13.13. 

“Distributed Property” shall have the meaning specified in Section 13.04(c). 

“Domestic Subsidiary” means a Wholly Owned Subsidiary of the Company that is a corporation organized and existing under the
laws of the United States of America, any State thereof or the District of Columbia. 
 “Effective Date” shall have the
meaning specified in Section 13.03(c), except that, as used in Section 13.04 and Section 13.05, “Effective Date” means the first date on which shares of the Common Stock trade on the applicable exchange or in the
applicable market, regular way, reflecting the relevant share split or share combination, as applicable. 
 “Event of
Default” shall have the meaning specified in Section 6.01. 

  
 4 

 “Ex-Dividend Date” means the first date on which shares of the Common Stock
trade on the applicable exchange or in the applicable market, regular way, without the right to receive the issuance, dividend or distribution in question, from the Company or, if applicable, from the seller of Common Stock on such exchange or
market (in the form of due bills or otherwise) as determined by such exchange or market. 
 “Exchange Act” means the
Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. 
 “Form of Assignment and
Transfer” shall mean the “Form of Assignment and Transfer” attached as Attachment 3 to the Form of Note attached hereto as Exhibit A. 

“Form of Fundamental Change Repurchase Notice” shall mean the “Form of Fundamental Change Repurchase Notice”
attached as Attachment 2 to the Form of Note attached hereto as Exhibit A. 
 “Form of Note” shall mean the “Form of
Note” attached hereto as Exhibit A. 
 “Form of Notice of Conversion” shall mean the “Form of Notice of
Conversion” attached as Attachment 1 to the Form of Note attached hereto as Exhibit A. 
 “Fundamental Change” shall
be deemed to have occurred at the time after the Notes are originally issued if any of the following occurs: 
 (a) a
“person” or “group” within the meaning of Section 13(d) of the Exchange Act, other than the Company, its direct or indirect Wholly Owned Subsidiaries or the employee benefit plans of the Company or its Wholly Owned
Subsidiaries, files a Schedule TO or any schedule, form or report under the Exchange Act disclosing that such person or group has become the direct or indirect “beneficial owner,” as defined in Rule 13d-3 under the Exchange Act, of the
Company’s Common Equity representing more than 50% of the voting power of the Company’s Common Equity; 
 (b) the
consummation of (A) any recapitalization, reclassification or change of the Common Stock (other than changes resulting from a subdivision or combination) as a result of which the Common Stock would be converted into, or exchanged for, stock,
other securities, other property or assets; (B) any share exchange, consolidation or merger of the Company pursuant to which the Common Stock will be converted into cash, securities or other property or assets; or (C) any sale, lease or
other transfer in one transaction or a series of transactions of all or substantially all of the consolidated assets of the Company and its Subsidiaries, taken as a whole, to any Person other than one of the Company’s direct or indirect Wholly
Owned Subsidiaries; provided, however, that neither (i) a transaction described in clause (B) in which the holders of all classes of the Company’s Common Equity immediately prior to such transaction own, directly or
indirectly, more than 50% of all classes of Common Equity of the continuing or surviving corporation or transferee or the parent thereof immediately after such transaction in substantially the same proportions as such ownership immediately prior to
such transaction nor (ii) any merger of the Company solely for the purpose of changing the Company’s jurisdiction of incorporation, that results in a reclassification, conversion or exchange of outstanding shares of Common Stock solely
into shares of common stock of the surviving entity shall be a Fundamental Change pursuant to this clause (b); 

  
 5 

 (c) the stockholders of the Company approve any plan or proposal for the
liquidation or dissolution of the Company; or 
 (d) the Common Stock (or other common stock underlying the Notes) ceases to
be listed or quoted on any of The New York Stock Exchange, The NASDAQ Global Select Market or The NASDAQ Global Market (or any of their respective successors); 

provided, however, that any transaction that constitutes a Fundamental Change pursuant to both clause (a) and clause (b) above shall
be deemed a Fundamental Change solely under clause (b) above; and provided, further that a transaction or transactions described in clauses (a) or (b) above shall not constitute a Fundamental Change if at least 90% of
the consideration received or to be received by the common stockholders of the Company, excluding cash payments for fractional shares or pursuant to statutory appraisal rights, in connection with such transaction or transactions consists of shares
of common stock that are listed or quoted on any of The New York Stock Exchange, The NASDAQ Global Select Market or The NASDAQ Global Market (or any of their respective successors) or will be so listed or quoted when issued or exchanged in
connection with such transaction or transactions and as a result of such transaction or transactions the Notes become convertible into such consideration, excluding cash payments for fractional shares or pursuant to statutory appraisal rights
(subject to the provisions of Section 13.07). 
 “Fundamental Change Company Notice” shall have the meaning specified
in Section 14.02(c). 
 “Fundamental Change Repurchase Date” shall have the meaning specified in
Section 14.02(a). 
 “Fundamental Change Repurchase Notice” shall have the meaning specified in
Section 14.02(b)(i). 
 “Fundamental Change Repurchase Price” shall have the meaning specified in
Section 14.02(a). 
 “given,” with respect to any notice to be given to a Holder pursuant to this Indenture, shall
mean notice (x) given to the Depositary (or its designee) pursuant to the standing instructions from the Depositary or its designee, including by electronic mail in accordance with accepted practices or procedures at the Depositary (in the case
of a Global Note) or (y) mailed to such Holder by first class mail, postage prepaid, at its address as it appears on the Note Register, in each case in accordance with Section 16.03. Notice so “given” shall be deemed to include
any notice to be “mailed” or “delivered,” as applicable, under this Indenture. 
 “Global Note” shall
have the meaning specified in Section 2.05(b). 

  
 6 

 “Holder,” as applied to any Note, or other similar terms (but excluding the term
“beneficial holder”), shall mean any Person in whose name at the time a particular Note is registered on the Note Register. 

“Indenture” means this instrument as originally executed or, if amended or supplemented as herein provided, as so amended or
supplemented. 
 “Initial Purchasers” shall have the meaning specified in the Purchase Agreement. 

“Interest Payment Date” means each March 15 and September 15 of each year, beginning on March 15, 2015. 

“Last Reported Sale Price” of the Common Stock on any date means the closing sale price per share (or if no closing sale
price is reported, the average of the bid and ask prices or, if more than one in either case, the average of the average bid and the average ask prices) on that date as reported in composite transactions for the principal U.S. national or regional
securities exchange on which the Common Stock is traded. If the Common Stock is not listed for trading on a U.S. national or regional securities exchange on the relevant date, the “Last Reported Sale Price” shall be the last quoted
bid price for the Common Stock in the over-the-counter market on the relevant date as reported by OTC Markets Group Inc. or a similar organization. If the Common Stock is 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 on the relevant date from each of at least three nationally recognized independent investment banking firms selected by the Company for this purpose. 

“Make-Whole Fundamental Change” means any transaction or event that constitutes a Fundamental Change (as defined above and
determined after giving effect to any exceptions to or exclusions from such definition, but without regard to subclause (i) of the proviso in clause (b) of the definition thereof). 

“Market Disruption Event” means, for the purposes of determining amounts due upon conversion (a) a failure by the
primary U.S. national or regional securities exchange or market on which the Common Stock is listed or admitted for trading to open for trading during its regular trading session or (b) the occurrence or existence prior to 1:00 p.m., New York
City time, on any Scheduled Trading Day for the Common Stock for more than one half-hour period in the aggregate during regular trading hours of any suspension or limitation imposed on trading (by reason of movements in price exceeding limits
permitted by the relevant stock exchange or otherwise) in the Common Stock or in any options contracts or futures contracts traded on any U.S. exchange relating to the Common Stock. 

“Maturity Date” means September 15, 2021. 

“Measurement Period” shall have the meaning specified in Section 13.01(b)(i). 

“Merger Event” shall have the meaning specified in Section 13.07(a). 

  
 7 

 “Note” or “Notes” shall have the meaning specified in the first
paragraph of the recitals of this Indenture. 
 “Note Register” shall have the meaning specified in Section 2.05(a).

 “Note Registrar” shall have the meaning specified in Section 2.05(a). 

“Notice of Conversion” shall have the meaning specified in Section 13.02(b). 

“Observation Period” with respect to any Note surrendered for conversion means: (i) if the relevant Conversion Date
occurs prior to March 15, 2021, the 30 consecutive Trading Day period beginning on, and including, the second Trading Day immediately succeeding such Conversion Date; and (ii) if the relevant Conversion Date occurs on or after
March 15, 2021, the 30 consecutive Trading Days beginning on, and including, the 32nd Scheduled Trading Day immediately preceding the Maturity Date. 

“Offering Memorandum” means the preliminary offering memorandum dated September 10, 2014, as supplemented by the related
pricing term sheet dated September 11, 2014, relating to the offering and sale of the Notes. 
 “Officer” means, with
respect to the Company, the President, any Chief Executive Officer, the Chief Financial Officer, the Chief Accounting Officer, the Treasurer, the Secretary, any Assistant Secretary, any Executive or Senior Vice President or any Vice President
(whether or not designated by a number or numbers or word or words added before or after the title “Vice President”). 

“Officer’s Certificate,” when used with respect to the Company, means a certificate that is delivered to the Trustee and
that is signed by an Officer of the Company. Each such certificate shall include the statements provided for in Section 16.05 if and to the extent required by the provisions of such Section. The Officer giving an Officer’s Certificate
pursuant to Section 4.08 shall be the principal executive, financial or accounting officer of the Company. 
 “open of
business” means 9:00 a.m. (New York City time). 
 “Opinion of Counsel” means an opinion in writing, signed by
legal counsel who is reasonably satisfactory to the Trustee, who may be an employee of or counsel to the Company, that is delivered to the Trustee, which opinion may contain customary exceptions and qualifications as to the matters set forth
therein. Each such opinion shall include the statements provided for in Section 16.05 if and to the extent required by the provisions of such Section 16.05. 

“outstanding,” when used with reference to Notes, shall, subject to the provisions of Section 8.04, mean, as of any
particular time, all Notes authenticated and delivered by the Trustee under this Indenture, except: 
 (a) Notes theretofore
canceled by the Trustee or accepted by the Trustee for cancellation; 

  
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 (b) Notes, or portions thereof, that have become due and payable and in respect
of which monies in the necessary amount shall have been deposited in trust with the Trustee or with any Paying Agent (other than the Company) or shall have been set aside and segregated in trust by the Company (if the Company shall act as its own
Paying Agent); 
 (c) Notes that have been paid pursuant to Section 2.06 or Notes in lieu of which, or in substitution
for which, other Notes shall have been authenticated and delivered pursuant to the terms of Section 2.06 unless proof satisfactory to the Trustee is presented that any such Notes are held by protected purchasers in due course; 

(d) Notes converted pursuant to Article 13 and required to be canceled pursuant to Section 2.08; and 

(e) Notes repurchased by the Company pursuant to the penultimate sentence of Section 2.10. 

“Paying Agent” shall have the meaning specified in Section 4.02. 

“Person” means an individual, a corporation, a limited liability company, an association, a partnership, a joint venture, a
joint stock company, a trust, an unincorporated organization or a government or an agency or a political subdivision thereof. 

“Physical Notes” means permanent certificated Notes in registered form issued in denominations of $1,000 principal amount and
integral multiples thereof. 
 “Physical Settlement” shall have the meaning specified in Section 13.02(a). 

“Predecessor Note” of any particular Note means every previous Note evidencing all or a portion of the same debt as that
evidenced by such particular Note; and, for the purposes of this definition, any Note authenticated and delivered under Section 2.06 in lieu of or in exchange for a mutilated, lost, destroyed or stolen Note shall be deemed to evidence the same
debt as the mutilated, lost, destroyed or stolen Note that it replaces. 
 “Purchase Agreement” means that certain Purchase
Agreement, dated September 11, 2014, between the Company and Goldman, Sachs & Co. and Morgan Stanley & Co. LLC as representatives of the Initial Purchasers. 

“Reference Property” shall have the meaning specified in Section 13.07(a). 

“Regular Record Date,” with respect to any Interest Payment Date, shall mean the March 1 or September 1 (whether or
not such day is a Business Day) immediately preceding the applicable March 15 or September 15 Interest Payment Date, respectively. 

“Resale Restriction Termination Date” shall have the meaning specified in Section 2.05(c). 

  
 9 

 “Responsible Officer” means, when used with respect to the Trustee, any officer
at the Corporate Trust Office who shall have direct responsibility for the administration of this Indenture, and also means any officer of the Trustee to whom any corporate trust matter relating to this Indenture is referred because of such
person’s knowledge of and familiarity with the particular subject. 
 “Restricted Securities” shall have the meaning
specified in Section 2.05(c). 
 “Rule 144” means Rule 144 as promulgated under the Securities Act. 

“Rule 144A” means Rule 144A as promulgated under the Securities Act. 

“Scheduled Trading Day” means a day that is scheduled to be a Trading Day on the principal U.S. national or regional
securities exchange or market on which the Common Stock is listed or admitted for trading. If the Common Stock is not so listed or admitted for trading, “Scheduled Trading Day” means a Business Day. 

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. 

“Settlement Amount” has the meaning specified in Section 13.02(a)(iv). 

“Settlement Method” means, with respect to any conversion of Notes, Physical Settlement, Cash Settlement or Combination
Settlement, as elected (or deemed to have been elected) by the Company. 
 “Settlement Notice” has the meaning specified in
Section 13.02(a)(iii). 
 “Significant Subsidiary” means, for purposes of Sections 6.01(g), (h) and (i), a
Subsidiary of the Company that is a “significant subsidiary” as defined under Rule 1-02(w) of Regulation S-X under the Exchange Act; provided that, in the case of a Subsidiary of the Company that meets the criteria of clause
(3) of the definition thereof but not clause (1) or (2) thereof, such Subsidiary shall not be deemed to be a Significant Subsidiary unless the Subsidiary’s income from continuing operations before income taxes, extraordinary
items and cumulative effect of a change in accounting principle exclusive of amounts attributable to any non-controlling interests for the last completed fiscal year prior to the date of such determination exceeds $75.0 million. 

“Specified Dollar Amount” means the maximum cash amount per $1,000 principal amount of Notes to be received upon conversion
as specified (or deemed specified pursuant to this Indenture) in the Settlement Notice related to any converted Notes. 

“Spin-Off” shall have the meaning specified in Section 13.04(c). 

“Stock Price” shall have the meaning specified in Section 13.03(c). 

  
 10 

 “Subsidiary” means, with respect to any Person, any corporation, association,
partnership or other business entity of which more than 50% of the total voting power of shares of Capital Stock or other interests (including partnership interests) entitled (without regard to the occurrence of any contingency) to vote in the
election of directors, managers, general partners or trustees thereof is at the time owned or controlled, directly or indirectly, by (i) such Person; (ii) such Person and one or more Subsidiaries of such Person; or (iii) one or more
Subsidiaries of such Person. 
 “Successor Company” shall have the meaning specified in Section 11.01(a). 

“Trading Day” means a day on which (i) trading in the Common Stock (or other security for which a closing sale price
must be determined) generally occurs on The New York Stock Exchange or, if the Common Stock (or such other security) is not then listed on The New York Stock Exchange, on the principal other U.S. national or regional securities exchange on which the
Common Stock (or such other security) is then listed or, if the Common Stock (or such other security) is not then listed on a U.S. national or regional securities exchange, on the principal other market on which the Common Stock (or such other
security) is then traded and (ii) a Last Reported Sale Price for the Common Stock (or closing sale price for such other security) is available on such securities exchange or market; provided that if the Common Stock (or such other
security) is not so listed or traded, “Trading Day” means a Business Day; and provided, further, that for purposes of determining amounts due upon conversion only, “Trading Day” means a day on which
(x) there is no Market Disruption Event and (y) trading in the Common Stock generally occurs on The New York Stock Exchange or, if the Common Stock is not then listed on The New York Stock Exchange, on the principal other U.S. national or
regional securities exchange on which the Common Stock is then listed or, if the Common Stock is not then listed on a U.S. national or regional securities exchange, on the principal other market on which the Common Stock is then listed or admitted
for trading, except that if the Common Stock is not so listed or admitted for trading, “Trading Day” means a Business Day. 

“Trading Price” of the Notes on any date of determination means the average of the secondary market bid quotations obtained
by the Bid Solicitation Agent for $2,000,000 principal amount of Notes at approximately 3:30 p.m., New York City time, on such determination date from three independent nationally recognized securities dealers the Company selects for this purpose;
provided that if three such bids cannot reasonably be obtained by the Bid Solicitation Agent but two such bids are obtained, then the average of the two bids shall be used, and if only one such bid can reasonably be obtained by the Bid
Solicitation Agent, that one bid shall be used. If the Bid Solicitation Agent cannot reasonably obtain at least one bid for $2,000,000 principal amount of Notes from a nationally recognized securities dealer on any determination date, then the
Trading Price per $1,000 principal amount of Notes on such determination date shall be deemed to be less than 98% of the product of the Last Reported Sale Price of the Common Stock and the Conversion Rate. 

“transfer” shall have the meaning specified in Section 2.05(c). 

“Trigger Event” shall have the meaning specified in Section 13.04(c). 

“Trust Indenture Act” means the Trust Indenture Act of 1939, as amended, as it was in force at the date of execution of this
Indenture; provided, however, that in the event the Trust Indenture Act of 1939 is amended after the date hereof, the term “Trust Indenture Act” shall mean, to the extent required by such amendment, the Trust Indenture Act of
1939, as so amended. 

  
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 “Trustee” means the Person named as the “Trustee” in the first
paragraph of this Indenture until a successor trustee shall have become such pursuant to the applicable provisions of this Indenture, and thereafter “Trustee” shall mean or include each Person who is then a Trustee hereunder. 

“unit of Reference Property” shall have the meaning specified in Section 13.07(a). 

“Valuation Period” shall have the meaning specified in Section 13.04(c). 

“Wholly Owned Subsidiary” means, with respect to any Person, any Subsidiary of such Person, except that, solely for purposes
of this definition, the reference to “50%” in the definition of “Subsidiary” shall be deemed replaced by a reference to “100%” (except for director qualifying shares or similar requirements). 

Section 1.02. References to Interest. Unless the context otherwise requires, any reference to interest on, or in respect of, any
Note in this Indenture shall be deemed to include Additional Interest if, in such context, Additional Interest is, was or would be payable pursuant to any of Section 4.06(d), Section 4.06(e) and Section 6.03. Unless the context
otherwise requires, any express mention of Additional Interest in any provision hereof shall not be construed as excluding Additional Interest in those provisions hereof where such express mention is not made. 

ARTICLE 2 
 ISSUE,
DESCRIPTION, EXECUTION, REGISTRATION AND EXCHANGE OF NOTES 

Section 2.01. Designation and Amount. The Notes shall be designated as the “1.00% Convertible Senior Notes due 2021.”
The aggregate principal amount of Notes that may be authenticated and delivered under this Indenture is initially limited to $900,000,000 (as increased by an amount of up to $100,000,000 aggregate principal amount of any additional Notes purchased
by the Initial Purchasers pursuant to the exercise of their over-allotment option as set forth in the Purchase Agreement), subject to Section 2.10 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 2.05, Section 2.06, Section 2.07, Section 10.04, Section 13.02 and Section 14.04. 

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 respective forms set forth in Exhibit A, the terms and provisions of which shall constitute, and are hereby expressly incorporated in and made a part of this Indenture. To the extent applicable, the Company and the Trustee, by
their execution and delivery of this Indenture, expressly agree to such terms and provisions and to be bound thereby. 

  
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 Any Global Note may be endorsed with or have incorporated in the text thereof such legends or
recitals or changes not inconsistent with the provisions of this Indenture as may be required by the Custodian or the Depositary, or as may be required to comply with any applicable law or any regulation thereunder or with the rules and regulations
of any securities exchange or automated quotation system upon which the Notes may be listed or traded or designated for issuance or to conform with any usage with respect thereto, or to indicate any special limitations or restrictions to which any
particular Notes are subject. 
 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 Indenture, or 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. 
 Each 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, cancellations, conversions, transfers, exchanges or issuances of additional Notes permitted hereby (to the extent such issuances are fungible with the Notes represented by
such Global Note for U.S. federal income tax and securities law purposes) 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 Indenture. Payment of principal (including the Fundamental Change Repurchase Price, if
applicable) of, 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. 

Section 2.03. Date and Denomination of Notes; Payments of Interest and Defaulted Amounts. (a) 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 such Note. Accrued
interest on the Notes shall be computed on the basis of a 360-day year composed of twelve 30-day months and, for partial months, on the basis of the number of days actually elapsed in a 30-day month. 

(b) The Person in whose name any Note (or its Predecessor Note) is registered on the Note Register at the close of business on any Regular
Record Date with respect to any Interest Payment Date shall be entitled to receive the interest payable on such Interest Payment Date. Interest shall be payable at the office or agency of the Company maintained by the Company for such purposes in
the United States of America, which shall initially be the Corporate Trust Office, or any other office or agency located in the United States of America so designated by the Trustee. The Company shall pay interest (i) on any Physical Notes
(A) to Holders holding Physical Notes having an aggregate principal amount of $5,000,000 or less, by check mailed to the Holders of these Notes at their address as it appears in the Note Register and (B) to Holders

  
 13 

 
holding Physical Notes having an aggregate principal amount of more than $5,000,000, either by check mailed to each such Holder or, upon application by such a Holder to the Note Registrar not
later than the relevant Regular Record Date, by wire transfer in immediately available funds to that Holder’s account within the United States, which application shall remain in effect until the Holder notifies, in writing, the Note Registrar
to the contrary or (ii) on any Global Note by wire transfer of immediately available funds to the account of the Depositary or its nominee. 

(c) Any Defaulted Amounts shall forthwith cease to be payable to the Holder on the relevant payment date but shall accrue interest per annum
at the rate borne by the Notes from, and including, such relevant payment date, and such Defaulted Amounts together with such interest thereon shall be paid by the Company, at its election in each case, as provided in clause (i) or
(ii) below: 
 (i) The Company may elect to make payment of any Defaulted Amounts to the Persons in whose names the
Notes (or their respective Predecessor Notes) are registered at the close of business on a special record date for the payment of such Defaulted Amounts, which shall be fixed in the following manner. The Company shall notify the Trustee in writing
of the amount of the Defaulted Amounts proposed to be paid on each Note and the date of the proposed payment (which shall be not less than 25 days after the receipt by the Trustee of such notice, unless the Trustee shall consent to an earlier date),
and at the same time the Company shall deposit with the Trustee an amount of money equal to the aggregate amount to be paid in respect of such Defaulted Amounts or shall make arrangements satisfactory to the Trustee for such deposit on or prior to
the date of the proposed payment, such money when deposited to be held in trust for the benefit of the Persons entitled to such Defaulted Amounts as in this clause provided. Thereupon the Company shall fix a special record date for the payment of
such Defaulted Amounts which shall be not more than 15 days and not less than 10 days prior to the date of the proposed payment, and not less than 10 days after the receipt by the Trustee of the notice of the proposed payment. The Company shall
promptly notify the Trustee in writing of such special record date and the Trustee, in the name and at the expense of the Company, shall cause notice of the proposed payment of such Defaulted Amounts and the special record date therefor to be
delivered to each Holder at its address as it appears in the Note Register, or by electronic means to the Depositary in the case of Global Notes, not less than 10 days prior to such special record date (provided the Trustee has received such
notice at least 10 days prior to such special record date). Notice of the proposed payment of such Defaulted Amounts and the special record date therefor having been so delivered, such Defaulted Amounts shall be paid to the Persons in whose names
the Notes (or their respective Predecessor Notes) are registered at the close of business on such special record date and shall no longer be payable pursuant to the following clause (ii) of this Section 2.03(c). 

(ii) The Company may make payment of any Defaulted Amounts in any other lawful manner not inconsistent with the requirements of
any securities exchange or automated quotation system on which the Notes may be listed or designated for issuance, and upon such notice as may be required by such exchange or automated quotation system, if, after written notice given by the Company
to the Trustee of the proposed payment pursuant to this clause, such manner of payment shall be deemed practicable by the Trustee. 

  
 14 

 Section 2.04. Execution, Authentication and Delivery of Notes. The Notes shall be
signed in the name and on behalf of the Company by the manual or facsimile signature of its Chief Executive Officer, President, Chief Financial Officer, Treasurer, Secretary, any Assistant Secretary or any of its Executive or Senior Vice Presidents.

 At any time and from time to time after the execution and delivery of this Indenture, the Company may deliver Notes executed by the
Company to the Trustee for authentication, together with a Company Order for the authentication and delivery of such Notes, and the Trustee in accordance with such Company Order shall authenticate and deliver such Notes. 

Only such Notes as shall bear thereon a certificate of authentication substantially in the form set forth on the form of Note attached as
Exhibit A hereto, executed manually by an authorized signatory of the Trustee (or an authenticating agent appointed by the Trustee as provided by Section 16.10), shall be entitled to the benefits of this Indenture or be valid or obligatory for
any purpose. Such certificate by the Trustee (or such an authenticating agent) upon any Note executed by the Company shall be conclusive evidence that the Note so authenticated has been duly authenticated and delivered hereunder and that the Holder
is entitled to the benefits of this Indenture. 
 In case any Officer of the Company who shall have signed any of the Notes shall cease to
be such Officer before the Notes so signed shall have been authenticated and delivered by the Trustee, or disposed of by the Company, such Notes nevertheless may be authenticated and delivered or disposed of as though the Person who signed such
Notes had not ceased to be such Officer of the Company; and any Note may be signed on behalf of the Company by such persons as, at the actual date of the execution of such Note, shall be the Officers of the Company, although at the date of the
execution of this Indenture any such Person was not such an Officer. 
 Section 2.05. Exchange and Registration of Transfer of
Notes; Restrictions on Transfer; Depositary. (a) The Company shall cause to be kept at the Corporate Trust Office a register (the register maintained in such office or in any other office or agency of the Company designated pursuant to
Section 4.02, the “Note Register”) in which, subject to such reasonable regulations as it may prescribe, the Company shall provide for the registration of Notes and of transfers of Notes. Such register shall be in written form
or in any form capable of being converted into written form within a reasonable period of time. The Trustee is hereby initially appointed the “Note Registrar” for the purpose of registering Notes and transfers of Notes as herein
provided. The Company may appoint one or more co-Note Registrars in accordance with Section 4.02. 
 Upon surrender for registration of
transfer of any Note to the Note Registrar or any co-Note Registrar, and satisfaction of the requirements for such transfer set forth in this Section 2.05, the Company shall execute, and the Trustee shall authenticate and deliver, in the name
of the designated transferee or transferees, one or more new Notes of any authorized denominations and of a like aggregate principal amount and bearing such restrictive legends as may be required by this Indenture. 

  
 15 

 Notes may be exchanged for other Notes of any authorized denominations and of a like aggregate
principal amount, upon surrender of the Notes to be exchanged at any such office or agency maintained by the Company pursuant to Section 4.02. Whenever any Notes are so surrendered for exchange, the Company shall execute, and the Trustee shall
authenticate and deliver, the Notes that the Holder making the exchange is entitled to receive, bearing registration numbers not contemporaneously outstanding. 

All Notes presented or surrendered for registration of transfer or for exchange, repurchase or conversion shall (if so required by the
Company, the Trustee, the Note Registrar or any co-Note Registrar) be duly endorsed, or be accompanied by a written instrument or instruments of transfer in form satisfactory to the Company and duly executed, by the Holder thereof or its
attorney-in-fact duly authorized in writing. 
 No service charge shall be imposed by the Company, the Trustee, the Note Registrar, any
co-Note Registrar or the Paying Agent for any exchange or registration of transfer of Notes, but the Company may require a Holder to pay a sum sufficient to cover any documentary, stamp or similar issue or transfer tax required in connection
therewith as a result of the name of the Holder of new Notes issued upon such exchange or registration of transfer being different from the name of the Holder of the old Notes surrendered for exchange or registration of transfer. 

None of the Company, the Trustee, the Note Registrar or any co-Note Registrar shall be required to exchange or register a transfer of
(i) any Notes surrendered for conversion or, if a portion of any Note is surrendered for conversion, such portion thereof surrendered for conversion or (ii) any Notes, or a portion of any Note, surrendered for repurchase (and not
withdrawn) in accordance with Article 14. 
 All Notes issued upon any registration of transfer or exchange of Notes in accordance with this
Indenture shall be the valid obligations of the Company, evidencing the same debt, and entitled to the same benefits under this Indenture as the Notes surrendered upon such registration of transfer or exchange. 

(b) So long as the Notes are eligible for book-entry settlement with the Depositary, unless otherwise required by law, subject to the fourth
paragraph from the end of Section 2.05(c) 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 that does not involve the issuance of a Physical Note shall be effected through the Depositary (but not the Trustee or the Custodian) in accordance with this Indenture (including the restrictions on
transfer set forth herein) and the procedures of the Depositary therefor. 
 (c) Every Note that bears or is required under this
Section 2.05(c) to bear the legend set forth in this Section 2.05(c) (together with any Common Stock issued upon conversion of the Notes that is required to bear the legend set forth in Section 2.05(d), collectively, the
“Restricted Securities”) shall be subject to the restrictions on transfer set forth in this Section 2.05(c) (including those contained in the legend set forth below), unless such restrictions on transfer shall be eliminated or
otherwise waived by written consent of the Company, and the Holder of each such Restricted Security, by such Holder’s acceptance thereof, agrees to be bound by all 

  
 16 

 
such restrictions on transfer. As used in this Section 2.05(c) and Section 2.05(d), the term “transfer” encompasses any sale, pledge, transfer or other disposition
whatsoever of any Restricted Security. 
 Until the date (the “Resale Restriction Termination Date”) that is the later of
(1) the date that is one year after the last date of original issuance of the Notes, or such shorter period of time as permitted by Rule 144 under the Securities Act or any successor provision thereto, and (2) such later date, if any, as
may be required by applicable law, any certificate evidencing such Note (and all securities issued in exchange therefor or substitution thereof, other than Common Stock, if any, issued upon conversion thereof, which shall bear the legend set forth
in Section 2.05(d), if applicable) shall bear a legend in substantially the following form (unless such Notes have been transferred pursuant to a registration statement that has become or been declared effective under the Securities Act and
that continues to be effective at the time of such transfer, or sold pursuant to the exemption from registration provided by Rule 144 or any similar provision then in force under the Securities Act, or unless otherwise agreed by the Company in
writing, with notice thereof to the Trustee): 
 THIS SECURITY AND THE COMMON STOCK, IF ANY, ISSUABLE UPON CONVERSION OF THIS SECURITY HAVE
NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT IN ACCORDANCE WITH THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF OR
OF A BENEFICIAL INTEREST HEREIN, THE ACQUIRER: 
 (1) REPRESENTS THAT IT AND ANY ACCOUNT FOR WHICH IT IS ACTING IS A
“QUALIFIED INSTITUTIONAL BUYER” (WITHIN THE MEANING OF RULE 144A UNDER THE SECURITIES ACT) AND THAT IT EXERCISES SOLE INVESTMENT DISCRETION WITH RESPECT TO EACH SUCH ACCOUNT, AND 

(2) AGREES FOR THE BENEFIT OF TWITTER, INC. (THE “COMPANY”) THAT IT WILL NOT OFFER, SELL, PLEDGE OR OTHERWISE
TRANSFER THIS SECURITY OR ANY BENEFICIAL INTEREST HEREIN PRIOR TO THE DATE THAT IS THE LATER OF (X) ONE YEAR AFTER THE LAST ORIGINAL ISSUE DATE HEREOF OR SUCH SHORTER PERIOD OF TIME AS PERMITTED BY RULE 144 UNDER THE SECURITIES ACT OR ANY
SUCCESSOR PROVISION THERETO AND (Y) SUCH LATER DATE, IF ANY, AS MAY BE REQUIRED BY APPLICABLE LAW, EXCEPT: 
 (A) TO THE
COMPANY OR ANY SUBSIDIARY THEREOF, OR 
 (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BECOME EFFECTIVE UNDER THE
SECURITIES ACT, OR 
 (C) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, OR 

  
 17 

 (D) PURSUANT TO AN EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE
SECURITIES ACT OR ANY OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. 
 PRIOR TO THE REGISTRATION OF
ANY TRANSFER IN ACCORDANCE WITH CLAUSE (2)(D) ABOVE, THE COMPANY AND THE TRUSTEE RESERVE THE RIGHT TO REQUIRE THE DELIVERY OF SUCH LEGAL OPINIONS, CERTIFICATIONS OR OTHER EVIDENCE AS MAY REASONABLY BE REQUIRED IN ORDER TO DETERMINE THAT THE
PROPOSED TRANSFER IS BEING MADE IN COMPLIANCE WITH THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS. NO REPRESENTATION IS MADE AS TO THE AVAILABILITY OF ANY EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. 

No transfer of any Note prior to the Resale Restriction Termination Date will be registered by the Note Registrar unless the applicable box on
the Form of Assignment and Transfer has been checked. 
 Any Note (or security issued in exchange or substitution therefor) as to which such
restrictions on transfer shall have expired in accordance with their terms may, upon surrender of such Note for exchange to the Note Registrar in accordance with the provisions of this Section 2.05, be exchanged for a new Note or Notes, of like
tenor and aggregate principal amount, which shall not bear the restrictive legend required by this Section 2.05(c) and shall not be assigned a restricted CUSIP number. The Company shall be entitled to instruct the Custodian in writing to so
surrender any Global Note as to which such restrictions on transfer shall have expired in accordance with their terms for exchange, and, upon such instruction, the Custodian shall so surrender such Global Note for exchange; and any new Global Note
so exchanged therefor shall not bear the restrictive legend specified in this Section 2.05(c) and shall not be assigned a restricted CUSIP number. The Company shall promptly notify the Trustee upon the occurrence of the Resale Restriction
Termination Date and promptly after a registration statement, if any, with respect to the Notes or any Common Stock issued upon conversion of the Notes has been declared effective under the Securities Act. 

Notwithstanding any other provisions of this Indenture (other than the provisions set forth in this Section 2.05(c)), a Global Note may
not be transferred as a whole or in part except (i) by the Depositary to a nominee of the Depositary or by a nominee of the Depositary to the Depositary or another nominee of the Depositary or by the Depositary or any such nominee to a
successor Depositary or a nominee of such successor Depositary and (ii) for transfers of portions of a Global Note in certificated form made upon request of a member of, or a participant in, the Depositary (for itself or on behalf of a
beneficial owner) by written notice given to the Trustee by or on behalf of the Depositary in accordance with customary procedures of the Depositary and in compliance with this Section 2.05(c). 

The Depositary shall be a clearing agency registered under the Exchange Act. The Company initially appoints The Depository Trust Company to
act as Depositary with respect to each Global Note. Initially, each Global Note shall be issued to the Depositary, registered in the name of Cede & Co., as the nominee of the Depositary, and deposited with the Trustee as custodian for
Cede & Co. 

  
 18 

 If (i) the Depositary notifies the Company at any time that the Depositary is unwilling or
unable to continue as depositary for the Global Notes and a successor depositary is not appointed within 90 days, (ii) the Depositary ceases to be registered as a clearing agency under the Exchange Act and a successor depositary is not
appointed within 90 days or (iii) an Event of Default with respect to the Notes has occurred and is continuing and a beneficial owner of any Note requests that its beneficial interest therein be exchanged for a Physical Note, the Company shall
execute, and the Trustee, upon receipt of an Officer’s Certificate, Opinion of Counsel and a Company Order for the authentication and delivery of Notes, shall authenticate and deliver, at the Company’s expense, (x) in the case of
clause (iii), a Physical Note to such beneficial owner in a principal amount equal to the principal amount of such Note corresponding such beneficial owner’s beneficial interest and (y) in the case of clause (i) or (ii), Physical
Notes to each beneficial owner of the related Global Notes (or a portion thereof) in an aggregate principal amount equal to the aggregate principal amount of such Global Notes in exchange for such Global Notes, and upon delivery of the Global Notes
to the Trustee such Global Notes shall be canceled. 
 Physical Notes issued in exchange for all or a part of the Global Note pursuant to
this Section 2.05(c) shall be registered in such names and in such authorized denominations as the Depositary, pursuant to instructions from its direct or indirect participants or otherwise, shall instruct the Trustee. Upon execution and
authentication, the Trustee shall deliver, at the Company’s expense, such Physical Notes to the Persons in whose names such Physical Notes are so registered. 

At such time as all interests in a Global Note have been converted, canceled, repurchased or transferred, such Global Note shall be, upon
receipt thereof, canceled by the Trustee in accordance with its customary procedures and instructions existing between the Depositary and the Custodian. At any time prior to such cancellation, if any interest in a Global Note is exchanged for
Physical Notes, converted, canceled, repurchased or transferred to a transferee who receives Physical Notes therefor or any Physical Note is exchanged or transferred for part of such Global Note, the principal amount of such Global Note shall, in
accordance with the standing procedures and instructions existing between the Depositary and the Custodian, be appropriately reduced or increased, as the case may be, and an endorsement shall be made on such Global Note, by the Trustee or the
Custodian, at the direction 
 None of the Company, the Trustee or any agent of the Company or the Trustee shall have any responsibility or
liability for any aspect of the records relating to or payments made on account of beneficial ownership interests of a Global Note or maintaining, supervising or reviewing any records relating to such beneficial ownership interests. 

(d) Until the Resale Restriction Termination Date, any stock certificate representing Common Stock issued upon conversion of such Note shall
bear a legend in substantially the following form (unless the Note or such Common Stock has been transferred pursuant to a registration statement that has become or been declared effective under the Securities Act and that continues to be effective
at the time of such transfer, or pursuant to the exemption from 

  
 19 

 
registration provided by Rule 144 or any similar provision then in force under the Securities Act, or such Common Stock has been issued upon conversion of Notes that have been transferred
pursuant to a registration statement that has become or been declared effective under the Securities Act and that continues to be effective at the time of such transfer, or pursuant to the exemption from registration provided by Rule 144 or any
similar provision then in force under the Securities Act, or unless otherwise agreed by the Company with written notice thereof to the Trustee and any transfer agent for the Common Stock): 

THIS SECURITY HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY NOT BE
OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT IN ACCORDANCE WITH THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL INTEREST HEREIN, THE ACQUIRER: 

(1) REPRESENTS THAT IT AND ANY ACCOUNT FOR WHICH IT IS ACTING IS A “QUALIFIED INSTITUTIONAL BUYER” (WITHIN THE
MEANING OF RULE 144A UNDER THE SECURITIES ACT) AND THAT IT EXERCISES SOLE INVESTMENT DISCRETION WITH RESPECT TO EACH SUCH ACCOUNT, AND 

(2) AGREES FOR THE BENEFIT OF TWITTER, INC. (THE “COMPANY”) THAT IT WILL NOT OFFER, SELL, PLEDGE OR OTHERWISE
TRANSFER THIS SECURITY OR ANY BENEFICIAL INTEREST HEREIN PRIOR TO THE DATE THAT IS THE LATER OF (X) ONE YEAR AFTER THE LAST ORIGINAL ISSUE DATE OF THE SERIES OF NOTES UPON THE CONVERSION OF WHICH THIS SECURITY WAS ISSUED OR SUCH SHORTER PERIOD
OF TIME AS PERMITTED BY RULE 144 UNDER THE SECURITIES ACT OR ANY SUCCESSOR PROVISION THERETO AND (Y) SUCH LATER DATE, IF ANY, AS MAY BE REQUIRED BY APPLICABLE LAW, EXCEPT: 

(A) TO THE COMPANY OR ANY SUBSIDIARY THEREOF, OR 

(B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BECOME EFFECTIVE UNDER THE SECURITIES ACT, OR 

(C) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE SECURITIES ACT, OR 

(D) PURSUANT TO AN EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT OR ANY OTHER AVAILABLE EXEMPTION
FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. 
 PRIOR TO THE REGISTRATION OF ANY TRANSFER IN ACCORDANCE WITH CLAUSE
(2)(D) ABOVE, THE COMPANY AND THE TRANSFER AGENT FOR THE COMPANY’S COMMON STOCK RESERVE THE RIGHT TO REQUIRE THE DELIVERY OF SUCH LEGAL OPINIONS, CERTIFICATIONS OR OTHER EVIDENCE AS MAY REASONABLY BE REQUIRED IN ORDER TO DETERMINE THAT THE
PROPOSED 

  
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TRANSFER IS BEING MADE IN COMPLIANCE WITH THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS. NO REPRESENTATION IS MADE AS TO THE AVAILABILITY OF ANY EXEMPTION FROM THE REGISTRATION
REQUIREMENTS OF THE SECURITIES ACT. 
 Any such Common Stock as to which such restrictions on transfer shall have expired in accordance with
their terms may, upon surrender of the certificates representing such shares of Common Stock for exchange in accordance with the procedures of the transfer agent for the Common Stock, be exchanged for a new certificate or certificates for a like
aggregate number of shares of Common Stock, which shall not bear the restrictive legend required by this Section 2.05(d). 
 (e) Any
Note or Common Stock issued upon the conversion or exchange of a Note that is repurchased or owned by any Affiliate of the Company (or any Person who was an Affiliate of the Company at any time during the three months preceding) may not be resold by
such Affiliate (or such Person, as the case may be) unless registered under the Securities Act or resold pursuant to an exemption from the registration requirements of the Securities Act in a transaction that results in such Note or Common Stock, as
the case may be, no longer being a “restricted security” (as defined under Rule 144). 
 (f) The Trustee shall have no obligation
or duty to monitor, determine or inquire as to compliance with any restrictions on transfer imposed under this Indenture or under applicable law with respect to any transfer of any interest in any Note (including any transfers between or among
depositary participants or beneficial owners or holders of any Global Note) other than to require delivery of such certificates and other documentation or evidence as are expressly required by the terms of this Indenture, and to examine the same to
determine substantial compliance as to form with the express requirements thereof. 
 (g) Neither the Trustee nor any agent shall have any
responsibility or liability for any actions taken or not taken by the Depositary. 
 Section 2.06. Mutilated, Destroyed, Lost or
Stolen Notes. In case any Note shall become mutilated or be destroyed, lost or stolen, the Company in its discretion may execute, and upon its written request the Trustee or an authenticating agent appointed by the Trustee shall authenticate and
deliver, a new Note, bearing a registration number not contemporaneously outstanding, in exchange and substitution for the mutilated Note, or in lieu of and in substitution for the Note so destroyed, lost or stolen. In every case the applicant for a
substituted Note shall furnish to the Company, to the Trustee and, if applicable, to such authenticating agent such security or indemnity as may be required by them to save each of them harmless from any loss, liability, cost or expense caused by or
connected with such substitution, and, in every case of destruction, loss or theft, the applicant shall also furnish to the Company, to the Trustee and, if applicable, to such authenticating agent evidence to their satisfaction of the destruction,
loss or theft of such Note and of the ownership thereof. 
 The Trustee or such authenticating agent may authenticate any such substituted
Note and deliver the same upon the receipt of such security or indemnity as the Trustee, the Company and, if applicable, such authenticating agent may require. No service charge shall be imposed by the

  
 21 

 
Company, the Trustee, the Note Registrar, any co-Note Registrar or the Paying Agent upon the issuance of any substitute Note, but the Company may require a Holder to pay a sum sufficient to cover
any documentary, stamp or similar issue or transfer tax required in connection therewith as a result of the name of the Holder of the new substitute Note being different from the name of the Holder of the old Note that became mutilated or was
destroyed, lost or stolen. In case any Note that has matured or is about to mature or has been surrendered for required repurchase or is about to be converted in accordance with Article 13 shall become mutilated or be destroyed, lost or stolen, the
Company may, in its sole discretion, instead of issuing a substitute Note, pay or authorize the payment of or convert or authorize the conversion of the same (without surrender thereof except in the case of a mutilated Note), as the case may be, if
the applicant for such payment or conversion shall furnish to the Company, to the Trustee and, if applicable, to such authenticating agent such security or indemnity as may be required by them to save each of them harmless for any loss, liability,
cost or expense caused by or connected with such substitution, and, in every case of destruction, loss or theft, evidence satisfactory to the Company, the Trustee and, if applicable, any Paying Agent or Conversion Agent of the destruction, loss or
theft of such Note and of the ownership thereof. 
 Every substitute Note issued pursuant to the provisions of this Section 2.06 by
virtue of the fact that any Note is destroyed, lost or stolen shall constitute an additional contractual obligation of the Company, whether or not the destroyed, lost or stolen Note shall be found at any time, and shall be entitled to all the
benefits of (but shall be subject to all the limitations set forth in) this Indenture equally and proportionately with any and all other Notes duly issued hereunder. To the extent permitted by law, all Notes shall be held and owned upon the express
condition that the foregoing provisions are exclusive with respect to the replacement or payment or conversion or repurchase of mutilated, destroyed, lost or stolen Notes and shall preclude any and all other rights or remedies notwithstanding any
law or statute existing or hereafter enacted to the contrary with respect to the replacement, payment, repurchase or conversion of negotiable instruments or other securities without their surrender. 

Section 2.07. Temporary Notes. Pending the preparation of Physical Notes, the Company may execute and the Trustee or an
authenticating agent appointed by the Trustee shall, upon written request of the Company, authenticate and deliver temporary Notes (printed or lithographed). Temporary Notes shall be issuable in any authorized denomination, and substantially in the
form of the Physical Notes but with such omissions, insertions and variations as may be appropriate for temporary Notes, all as may be determined by the Company. Every such temporary Note shall be executed by the Company and authenticated by the
Trustee or such authenticating agent upon the same conditions and in substantially the same manner, and with the same effect, as the Physical Notes. Without unreasonable delay, the Company shall execute and deliver to the Trustee or such
authenticating agent Physical Notes (other than any Global Note) and thereupon any or all temporary Notes (other than any Global Note) may be surrendered in exchange therefor, at each office or agency maintained by the Company pursuant to
Section 4.02 and the Trustee or such authenticating agent shall authenticate and deliver in exchange for such temporary Notes an equal aggregate principal amount of Physical Notes. Such exchange shall be made by the Company at its own expense
and without any charge therefor. Until so exchanged, the temporary Notes shall in all respects be entitled to the same benefits and subject to the same limitations under this Indenture as Physical Notes authenticated and delivered hereunder. 

  
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 Section 2.08. Cancellation of Notes Paid, Converted, Etc. The Company shall cause all
Notes owned by it or surrendered for the purpose of payment, repurchase, registration of transfer or exchange or conversion, if surrendered to any of the Company’s agents, Subsidiaries or Affiliates, to be surrendered to the Trustee for
cancellation. All Notes delivered to the Trustee shall be canceled promptly by it, and no Notes shall be authenticated in exchange therefor except as expressly permitted by any of the provisions of this Indenture. The Trustee shall dispose of
canceled Notes in accordance with its customary procedures and, after such disposition, shall deliver a certificate of such disposition to the Company, at the Company’s written request in a Company Order. 

Section 2.09. CUSIP Numbers. The Company in issuing the Notes may use “CUSIP” numbers (if then generally in use), and,
if so, the Trustee shall use “CUSIP” numbers in all notices issued to Holders as a convenience to such Holders; provided that any such notice may state that no representation is made as to the correctness of such numbers either as
printed on the Notes or on such notice and that reliance may be placed only on the other identification numbers printed on the Notes. The Company shall promptly notify the Trustee in writing of any change in the “CUSIP” numbers. 

Section 2.10. Additional Notes; Repurchases. The Company may, without the consent of the Holders and notwithstanding
Section 2.01, reopen this Indenture and issue additional Notes hereunder with the same terms as the Notes initially issued hereunder (except for any differences in the issue price and interest accrued prior to the issue date of such additional
Notes) in an unlimited aggregate principal amount; provided that if any such additional Notes are not fungible with the Notes initially issued hereunder for U.S. federal income tax purposes, such additional Notes shall have one or more
separate CUSIP numbers. Prior to the issuance of any such additional Notes, the Company shall deliver to the Trustee a Company Order, an Officer’s Certificate and an Opinion of Counsel, such Officer’s Certificate and Opinion of Counsel to
cover such matters, in addition to those required by Section 16.05. In addition, the Company may, to the extent permitted by law, and directly or indirectly (regardless of whether such Notes are surrendered to the Company), repurchase Notes in
the open market or otherwise, whether by the Company or its Subsidiaries or through a private or public tender or exchange offer or through counterparties to private agreements, including by cash-settled swaps or other derivatives. The Company shall
cause any Notes so repurchased (other than Notes repurchased pursuant to cash-settled swaps or other derivatives) to be surrendered to the Trustee for cancellation in accordance with Section 2.08. 

ARTICLE 3 

SATISFACTION AND DISCHARGE 

Section 3.01. Satisfaction and Discharge. This Indenture shall upon request of the Company contained in an Officer’s
Certificate cease to be of further effect, and the Trustee, at the expense of the Company, shall execute such instruments reasonably requested by the Company acknowledging satisfaction and discharge of this Indenture, when (a) (i) all
Notes 

  
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theretofore authenticated and delivered (other than (x) Notes which have been destroyed, lost or stolen and which have been replaced, paid or converted as provided in Section 2.06 and
(y) Notes for whose payment money has theretofore been deposited in trust or segregated and held in trust by the Company and thereafter repaid to the Company or discharged from such trust, as provided in Section 4.04(d)) have been
delivered to the Trustee for cancellation; or (ii) the Company has deposited with the Trustee or delivered to Holders, as applicable, after the Notes have become due and payable, whether on the Maturity Date, any Fundamental Change Repurchase
Date, upon conversion or otherwise, cash or cash, shares of Common Stock or a combination thereof, as applicable, solely to satisfy the Company’s Conversion Obligation, sufficient to pay all of the outstanding Notes and all other sums due and
payable under this Indenture by the Company; and (b) the Company has delivered to the Trustee an Officer’s Certificate and an Opinion of Counsel, each stating that all conditions precedent herein provided for relating to the satisfaction
and discharge of this Indenture have been complied with. Notwithstanding the satisfaction and discharge of this Indenture, the obligations of the Company to the Trustee under Section 7.06 shall survive. 

ARTICLE 4 

PARTICULAR COVENANTS OF THE COMPANY 

Section 4.01. Payment of Principal and Interest. The Company covenants and agrees that it will cause to be paid the principal
(including the Fundamental Change Repurchase Price, if applicable) of, and accrued and unpaid interest on, each of the Notes at the places, at the respective times and in the manner provided herein and in the Notes. 

Section 4.02. Maintenance of Office or Agency. The Company will maintain an office or agency, which initially shall be the
Corporate Trust Office, where the Notes may be surrendered for registration of transfer or exchange or for presentation for payment or repurchase (“Paying Agent”) or for conversion (“Conversion Agent”) and where
notices and demands to or upon the Company in respect of the Notes and this Indenture may be served. The Company will give prompt written notice to the Trustee of the location, and any change in the location, of such office or agency. 

The Company may also from time to time designate as co-Note Registrars one or more other offices or agencies where the Notes may be presented
or surrendered for any or all such purposes and may from time to time rescind such designations; provided that no such designation or rescission shall in any manner relieve the Company of its obligation to maintain an office or agency in the
United States of America so designated by the Trustee as a place for such purposes. The Company will give prompt written notice to the Trustee of any such designation or rescission and of any change in the location of any such other office or
agency. The terms “Paying Agent” and “Conversion Agent” include any such additional or other offices or agencies, as applicable. 

The Company hereby initially designates the Trustee as the Paying Agent, Note Registrar, Custodian and Conversion Agent and the Corporate
Trust Office as the office or agency in the United States of America where Notes may be surrendered for registration of transfer or exchange or for presentation for payment or repurchase or for conversion and where notices and demands to or upon the
Company in respect of the Notes and this Indenture may be made. 

  
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 Section 4.03. Appointments to Fill Vacancies in Trustee’s Office. The Company,
whenever necessary to avoid or fill a vacancy in the office of Trustee, will appoint, in the manner provided in Section 7.09, a Trustee, so that there shall at all times be a Trustee hereunder. 

Section 4.04. Provisions as to Paying Agent. (a) If the Company shall appoint a Paying Agent other than the Trustee, the
Company will cause such Paying Agent to execute and deliver to the Trustee an instrument in which such agent shall agree with the Trustee, subject to the provisions of this Section 4.04: 

(i) that it will hold all sums held by it as such agent for the payment of the principal (including the Fundamental Change
Repurchase Price, if applicable) of, and accrued and unpaid interest on, the Notes in trust for the benefit of the Holders of the Notes; 

(ii) that it will give the Trustee prompt notice of any failure by the Company to make any payment of the principal (including
the Fundamental Change Repurchase Price, if applicable) of, and accrued and unpaid interest on, the Notes when the same shall be due and payable; and 

(iii) that at any time during the continuance of an Event of Default, upon request of the Trustee, it will forthwith pay to the
Trustee all sums so held in trust. 
 The Company shall, on or before each due date of the principal (including the Fundamental Change
Repurchase Price, if applicable) of, or accrued and unpaid interest on, the Notes, deposit with the Paying Agent a sum sufficient to pay such principal (including the Fundamental Change Repurchase Price, if applicable) or accrued and unpaid
interest, and (unless such Paying Agent is the Trustee) the Company will promptly notify the Trustee of any failure to take such action; provided that if such deposit is made on the due date, such deposit must be received by the Paying Agent
by 11:00 a.m., New York City time, on such date. 
 (b) If the Company shall act as its own Paying Agent, it will, on or before each due
date of the principal (including the Fundamental Change Repurchase Price, if applicable) of, and accrued and unpaid interest on, the Notes, set aside, segregate and hold in trust for the benefit of the Holders of the Notes a sum sufficient to pay
such principal (including the Fundamental Change Repurchase Price, if applicable) and accrued and unpaid interest so becoming due and will promptly notify the Trustee in writing of any failure to take such action and of any failure by the Company to
make any payment of the principal (including the Fundamental Change Repurchase Price, if applicable) of, or accrued and unpaid interest on, the Notes when the same shall become due and payable. 

(c) Anything in this Section 4.04 to the contrary notwithstanding, the Company may, at any time, for the purpose of obtaining a
satisfaction and discharge of this Indenture, or for any other reason, pay, cause to be paid or deliver to the Trustee all sums or amounts held in trust by the Company or any Paying Agent hereunder as required by this Section 4.04, such sums or

  
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amounts to be held by the Trustee upon the trusts herein contained and upon such payment or delivery by the Company or any Paying Agent to the Trustee, the Company or such Paying Agent shall be
released from all further liability but only with respect to such sums or amounts. 
 (d) Subject to applicable abandoned property laws, any
money and shares of Common Stock deposited with the Trustee or any Paying Agent, or then held by the Company, in trust for the payment of the principal (including the Fundamental Change Repurchase Price, if applicable) of, accrued and unpaid
interest on and the consideration due upon conversion of any Note and remaining unclaimed for two years after such principal (including the Fundamental Change Repurchase Price, if applicable), interest or consideration due upon conversion has become
due and payable shall be paid to the Company on request of the Company contained in an Officer’s Certificate, or (if then held by the Company) shall be discharged from such trust; and the Holder of such Note shall thereafter, as an unsecured
general creditor, look only to the Company for payment thereof, and all liability of the Trustee or such Paying Agent with respect to such trust money and shares of Common Stock, and all liability of the Company as trustee thereof, shall thereupon
cease; provided, however, that the Trustee or such Paying Agent, before being required to make any such repayment, may (but shall not be obligated) at the expense of the Company cause to be published once, in a newspaper published in
the English language, customarily published on each Business Day and of general circulation in The Borough of Manhattan, The City of New York, notice that such money and shares of Common Stock remains unclaimed and that, after a date specified
therein, which shall not be less than 30 days from the date of such publication, any unclaimed balance of such money and shares of Common Stock then remaining will be repaid or delivered to the Company. 

(e) Upon any Event of Default pursuant to Section 6.01(h) or (i), the Trustee shall automatically be the Paying Agent. 

Section 4.05. Existence. Subject to Article 11, the Company shall do or cause to be done all things necessary to preserve and keep
in full force and effect its corporate existence. 
 Section 4.06. Rule 144A Information Requirement and Annual Reports.
(a) At any time the Company is not subject to Section 13 or 15(d) of the Exchange Act, the Company shall, so long as any of the Notes or any shares of Common Stock issuable upon conversion thereof shall, at such time, constitute
“restricted securities” within the meaning of Rule 144(a)(3) under the Securities Act, promptly provide to the Trustee and will, upon written request, provide to any Holder, beneficial owner or prospective purchaser of such Notes or any
shares of Common Stock issuable upon conversion of such Notes, the information required to be delivered pursuant to Rule 144A(d)(4) under the Securities Act to facilitate the resale of such Notes or shares of Common Stock pursuant to Rule 144A. The
Company shall take such further action as any Holder or beneficial owner of such Notes or such Common Stock may reasonably request to the extent from time to time required to enable such Holder or beneficial owner to sell such Notes or shares of
Common Stock in accordance with Rule 144A, as such rule may be amended from time to time. 
 (b) The Company shall file with the Trustee,
within 15 days after the same are required to be filed with the Commission (giving effect to any grace period provided by Rule 12b-25 (or any successor rule) under the Exchange Act), copies of any documents or reports that the

  
 26 

 
Company is required to file with the Commission pursuant to Section 13 or 15(d) of the Exchange Act (excluding any such information, documents or reports, or portions thereof, subject to
confidential treatment and any correspondence with the Commission). Any such document or report that the Company files with the Commission via the Commission’s EDGAR system shall be deemed to be filed with the Trustee for purposes of this
Section 4.06(b) at the time such documents are filed via the EDGAR system (or any successor thereto), it being understood that the Trustee shall not be responsible for determining whether such filings have been made. 

(c) Delivery of the reports and documents described in subsection (b) above 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 on an Officer’s Certificate). 
 (d) If, at any time during the six-month period beginning
on, and including, the date that is six months after the last date of original issuance of the Notes, the Company fails to timely file any document or report that it is required to file with the Commission pursuant to Section 13 or 15(d) of the
Exchange Act, as applicable (after giving effect to all applicable grace periods thereunder and other than reports on Form 8-K), or the Notes are not otherwise freely tradable by Holders other than the Company’s Affiliates or Holders that were
the Company’s Affiliates at any time during the three months preceding (as a result of restrictions pursuant to U.S. securities laws or the terms of this Indenture or the Notes), the Company shall pay Additional Interest on the Notes. Such
Additional Interest shall accrue on the Notes at the rate of 0.50% per annum of the principal amount of the Notes outstanding for each day during such period for which the Company’s failure to file has occurred and is continuing or the
Notes are not otherwise freely tradable by Holders other than the Company’s Affiliates (or Holders that have been the Company’s Affiliates at any time during the three months preceding) without restrictions pursuant to U.S. securities laws
or the terms of this Indenture or the Notes. As used in this Section 4.06(d), documents or reports that the Company is required to “file” with the Commission pursuant to Section 13 or 15(d) of the Exchange Act does not include
documents or reports that the Company furnishes to the Commission pursuant to Section 13 or 15(d) of the Exchange Act. 
 (e) If, and
for so long as, the restrictive legend on the Notes specified in Section 2.05(c) has not been removed, the Notes are assigned a restricted CUSIP number or the Notes are not otherwise freely tradable by Holders other than the Company’s
Affiliates or Holders that were the Company’s Affiliates at any time during the three months preceding (without restrictions pursuant to U.S. securities laws or the terms of this Indenture or the Notes) as of the 370th day after the last date
of original issuance of the Notes, the Company shall pay Additional Interest on the Notes at a rate equal to 0.50% per annum of the principal amount of Notes outstanding until the restrictive legend on the Notes has been removed in accordance
with Section 2.05(c), the Notes are assigned an unrestricted CUSIP and the Notes are freely tradable by Holders other than the Company’s Affiliates (or Holders that were the Company’s Affiliates at any time during the three months
preceding) (without restrictions pursuant to U.S. securities laws or the terms of this Indenture or the Notes). 

  
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 (f) Additional Interest will be payable in arrears on each Interest Payment Date following
accrual in the same manner as regular interest on the Notes. 
 (g) The Additional Interest that is payable in accordance with
Section 4.06(d) or Section 4.06(e) shall be in addition to, and not in lieu of, any Additional Interest that may be payable as a result of the Company’s election pursuant to Section 6.03. Notwithstanding the foregoing, in no
event shall Additional Interest accrue under the terms of this Indenture (aggregating any Additional Interest payable pursuant to Section 4.06(d) or Section 4.06(e) with any Additional Interest payable pursuant to Section 6.03) at a
rate per year in excess of 0.50%, regardless of the number of events or circumstances giving rise to the requirement to pay such Additional Interest. The Trustee shall have no duty to verify the Company’s determination of whether Additional
Interest is due or the Company’s calculations as to the amount of Additional Interest. 
 (h) If Additional Interest is payable by the
Company pursuant to Section 4.06(d) or Section 4.06(e), the Company shall deliver to the Trustee an Officer’s Certificate to that effect stating (i) the amount of such Additional Interest that is payable and (ii) the date on
which such Additional Interest is payable. Unless and until a Responsible Officer of the Trustee receives at the Corporate Trust Office such a certificate, the Trustee may assume without inquiry that no such Additional Interest is payable. If the
Company has paid Additional Interest directly to the Persons entitled to it, the Company shall deliver to the Trustee an Officer’s Certificate setting forth the particulars of such payment. 

Section 4.07. Stay, Extension and Usury Laws. The Company covenants (to the extent that it may lawfully do so) that it shall not
at any time insist upon, plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay, extension or usury law or other law that would prohibit or forgive the Company from paying all or any portion of the principal of or
interest on the Notes as contemplated herein, wherever enacted, now or at any time hereafter in force, or that may affect the covenants or the performance of this Indenture; and the Company (to the extent it may lawfully do so) hereby expressly
waives all benefit or advantage of any such law, and covenants that it will not, by resort to any such law, hinder, delay or impede the execution of any power herein granted to the Trustee, but will suffer and permit the execution of every such
power as though no such law had been enacted. 
 Section 4.08. Compliance Certificate; Statements as to Defaults. The Company
shall deliver to the Trustee within 120 days after the end of each fiscal year of the Company (beginning with the fiscal year ending on December 31, 2014) an Officer’s Certificate stating whether the signers thereof have knowledge of any
failure by the Company to comply with all conditions and covenants then required to be performed under this Indenture and, if so, specifying each such failure and the nature thereof. 

In addition, the Company shall deliver to the Trustee, as soon as possible, and in any event within 30 days after the occurrence of any Event
of Default or Default, an Officer’s Certificate setting forth the details of such Event of Default or Default, its status and the action that the Company is taking or proposing to take in respect thereof. 

  
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 Section 4.09. 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 Indenture. 

ARTICLE 5 
 LISTS
OF HOLDERS AND REPORTS BY THE COMPANY AND THE TRUSTEE 

Section 5.01. Lists of Holders. The Company covenants and agrees that it will furnish or cause to be furnished to the Trustee and
any Paying Agent, semi-annually, not more than 15 days after each March 1 and September 1 in each year beginning with March 1, 2015, and at such other times as the Trustee may request in writing, within 30 days after receipt by the
Company of any such request (or such lesser time as the Trustee may reasonably request in order to enable it to timely provide any notice to be provided by it hereunder), a list in such form as the Trustee may reasonably require of the names and
addresses of the Holders as of a date not more than 15 days (or such other date as the Trustee may reasonably request in order to so provide any such notices) prior to the time such information is furnished, except that no such list need be
furnished so long as the Trustee is acting as Note Registrar. 
 Section 5.02. Preservation and Disclosure of Lists. The Trustee
shall preserve, in as current a form as is reasonably practicable, all information as to the names and addresses of the Holders contained in the most recent list furnished to it as provided in Section 5.01 or maintained by the Trustee in its
capacity as Note Registrar, if so acting. The Trustee may destroy any list furnished to it as provided in Section 5.01 upon receipt of a new list so furnished. 

ARTICLE 6 
 DEFAULTS
AND REMEDIES 
 Section 6.01. Events of Default. Each of the following events shall be an
“Event of Default” with respect to the Notes: 
 (a) default in any payment of interest on any Note when due and payable,
and the default continues for a period of 30 days; 
 (b) default in the payment of principal of any Note when due and payable on the
Maturity Date, upon any required repurchase, upon declaration of acceleration or otherwise; 
 (c) failure by the Company to comply with its
obligation to convert the Notes in accordance with this Indenture upon exercise of a Holder’s conversion right and such failure continues for a period of three Business Days; 

(d) failure by the Company to comply with its obligations under Article 11; 

(e) failure by the Company to issue a Fundamental Change Company Notice in accordance with Section 14.02(c) or notice of a specified
corporate event in accordance with Section 13.01(b)(ii) or (iii), in each case when due; 

  
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 (f) failure by the Company for 60 days after written notice from the Trustee or the Holders of at
least 25% in principal amount of the Notes then outstanding has been received by the Company to comply with any of its other agreements contained in the Notes or this Indenture; 

(g) default by the Company or any Significant Subsidiary with respect to any mortgage, agreement or other instrument under which there may be
outstanding, or by which there may be secured or evidenced, any indebtedness for money borrowed in excess of $100,000,000 (or its foreign currency equivalent) in the aggregate of the Company and/or any such Subsidiary, whether such indebtedness now
exists or shall hereafter be created (i) resulting in such indebtedness becoming or being declared due and payable or (ii) constituting a failure to pay the principal of any such indebtedness when due and payable at its stated maturity,
upon required repurchase, upon declaration of acceleration or otherwise, and in the cases of clauses (i) and (ii) such acceleration shall not have been rescinded or annulled or such failure to pay or default shall not have been cured or
waived, or such indebtedness shall not have been paid or discharged, as the case may be, within 30 days after written notice of such acceleration or failure to pay, as the case may be, has been received by the Company or such Subsidiary of the
Company from the Trustee, or by the Trustee and the Company from the Holders of at least 25% in principal amount of the Notes then outstanding; 

(h) the Company or any Significant Subsidiary shall commence a voluntary case or other proceeding seeking liquidation, reorganization or other
relief with respect to the Company or any such Significant Subsidiary or its debts under any bankruptcy, insolvency or other similar law now or hereafter in effect or seeking the appointment of a trustee, receiver, liquidator, custodian or other
similar official of the Company or any such Significant Subsidiary or any substantial part of its property, or shall consent to any such relief or to the appointment of or taking possession by any such official in an involuntary case or other
proceeding commenced against it, or shall make a general assignment for the benefit of creditors, or shall fail generally to pay its debts as they become due; or 

(i) an involuntary case or other proceeding shall be commenced against the Company or any Significant Subsidiary seeking liquidation,
reorganization or other relief with respect to the Company or such Significant Subsidiary or its debts under any bankruptcy, insolvency or other similar law now or hereafter in effect or seeking the appointment of a trustee, receiver, liquidator,
custodian or other similar official of the Company or such Significant Subsidiary or any substantial part of its property, and such involuntary case or other proceeding shall remain undismissed and unstayed for a period of 30 consecutive days. 

Section 6.02. Acceleration; Rescission and Annulment. If one or more Events of Default shall have occurred and be continuing
(whatever the reason for such Event of Default and whether it shall be voluntary or involuntary or be effected by operation of law or pursuant to any judgment, decree or order of any court or any order, rule or regulation of any administrative or
governmental body), then, and in each and every such case (other than an Event of Default specified in Section 6.01(h) or Section 6.01(i) with respect to the Company), unless the principal of all of the Notes shall have already become due
and payable, either the Trustee or the Holders of at least 25% in aggregate principal amount of the Notes then outstanding determined in accordance with Section 8.04, by notice in writing to the Company (and to the Trustee if given by Holders),
may declare 100% of the principal of, and accrued and unpaid interest on, all the 

  
 30 

 
Notes to be due and payable immediately, and upon any such declaration the same shall become and shall automatically be immediately due and payable, anything in this Indenture or in the Notes
contained to the contrary notwithstanding. If an Event of Default specified in Section 6.01(h) or Section 6.01(i) with respect to the Company occurs and is continuing, 100% of the principal of, and accrued and unpaid interest, if any, on,
all Notes shall become and shall automatically be immediately due and payable. 
 The immediately preceding paragraph, however, is subject
to the conditions that if, at any time after the principal of the Notes shall have been so declared due and payable, and before any judgment or decree for the payment of the monies due shall have been obtained or entered as hereinafter provided, the
Company shall pay or shall deposit with the Trustee a sum sufficient to pay installments of accrued and unpaid interest upon all Notes and the principal of any and all Notes that shall have become due otherwise than by acceleration (with interest on
overdue installments of accrued and unpaid interest, and on such principal at the rate borne by the Notes at such time) and amounts due to the Trustee pursuant to Section 7.06, and if (1) rescission would not conflict with any judgment or
decree of a court of competent jurisdiction and (2) any and all existing Events of Default under this Indenture, other than the nonpayment of the principal of and accrued and unpaid interest, if any, on Notes that shall have become due solely
by such acceleration, shall have been cured or waived pursuant to Section 6.09, then and in every such case (except as provided in the immediately succeeding sentence) the Holders of a majority in aggregate principal amount of the Notes then
outstanding, by written notice to the Company and to the Trustee, may waive all Defaults or Events of Default with respect to the Notes and rescind and annul such declaration and its consequences and 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; but no such waiver or rescission and annulment shall extend to or shall affect any subsequent Default or Event of Default, or shall impair any right
consequent thereon. Notwithstanding anything to the contrary herein, no such waiver or rescission and annulment shall extend to or shall affect any Default or Event of Default resulting from (i) the nonpayment of the principal of, or accrued
and unpaid interest on, any Notes, (ii) a failure to repurchase any Notes when required or (iii) a failure to pay or deliver, as the case may be, the consideration due upon conversion of the Notes. 

Section 6.03. Additional Interest. Notwithstanding anything in this Indenture or in the Notes to the contrary, to the extent the
Company elects, the sole remedy for an Event of Default relating to the Company’s failure to comply with its obligations as set forth in Section 4.06(b) shall, for the first 360 days after the occurrence of such an Event of Default,
consist exclusively of the right to receive Additional Interest on the Notes at a rate equal to (i) 0.25% per annum of the principal amount of the Notes outstanding for each day during the first 180 calendar days on which such Event of Default
is continuing beginning on, and including, the date on which such Event of Default first occurs (or, if earlier, the date on which such Event of Default is cured or waived as provided for in this Indenture) and (ii) 0.50% per annum of the
principal amount of the Notes outstanding for each day from, and including, the 181st calendar day to, and including, the 360th calendar day after the occurrence of such an Event of Default during which such Event of Default is continuing (or, if
earlier, the date on which such Event of Default is cured or waived as provided for in this Indenture). Additional Interest payable pursuant to this Section 6.03 shall be in addition to, not in lieu of, any Additional Interest payable pursuant
to Section 4.06(d) 

  
 31 

 
or Section 4.06(e). If the Company so elects, such Additional Interest shall be payable in the same manner and on the same dates as regular interest on the Notes. On the 361st day after such
Event of Default (if the Event of Default relating to the Company’s failure to comply with its obligations as set forth in Section 4.06(b) is not cured or waived prior to such 361st day), the Notes shall be immediately subject to
acceleration as provided in Section 6.02. In the event the Company does not elect to pay Additional Interest following an Event of Default in accordance with this Section 6.03 or the Company elected to make such payment but does not pay
the Additional Interest when due, the Notes shall be immediately subject to acceleration as provided in Section 6.02. 
 In order to
elect to pay Additional Interest as the sole remedy during the first 360 days after the occurrence of any Event of Default described in the immediately preceding paragraph, the Company must notify all Holders of the Notes, the Trustee and the Paying
Agent of such election in writing prior to the beginning of such 360-day period. Upon the failure to timely give such notice, the Notes shall be immediately subject to acceleration as provided in Section 6.02. 

In no event shall Additional Interest accrue under the terms of this Indenture (aggregating any Additional Interest payable pursuant to this
Section 6.03 with any Additional Interest payable pursuant to Section 4.06(d) or Section 4.06(e)) at a rate per year in excess of 0.50%, regardless of the number of events or circumstances giving rise to the requirement to pay such
Additional Interest. 
 Section 6.04. Payments of Notes on Default; Suit Therefor. If an Event of Default described in clause
(a) or (b) of Section 6.01 shall have occurred, the Company shall, upon demand of the Trustee, pay to the Trustee, for the benefit of the Holders of the Notes, the whole amount then due and payable on the Notes for principal and
interest, if any, with interest on any overdue principal and interest, if any, at the rate borne by the Notes at such time, and, in addition thereto, such further amount as shall be sufficient to cover any amounts due to the Trustee under
Section 7.06. If the Company shall fail to pay such amounts forthwith upon such demand, the Trustee, in its own name and as trustee of an express trust, may institute a judicial proceeding for the collection of the sums so due and unpaid, may
prosecute such proceeding to judgment or final decree and may enforce the same against the Company or any other obligor upon the Notes and collect the moneys adjudged or decreed to be payable in the manner provided by law out of the property of the
Company or any other obligor upon the Notes, wherever situated. 
 In the event there shall be pending proceedings for the bankruptcy or for
the reorganization of the Company or any other obligor on the Notes under Title 11 of the United States Code, or any other applicable law, or in case a receiver, assignee or trustee in bankruptcy or reorganization, liquidator, sequestrator or
similar official shall have been appointed for or taken possession of the Company or such other obligor, the property of the Company or such other obligor, or in the event of any other judicial proceedings relative to the Company or such other
obligor upon the Notes, or to the creditors or property of the Company or such other obligor, the Trustee, irrespective of whether the principal of the Notes shall then be due and payable as therein expressed or by declaration or otherwise and
irrespective of whether the Trustee shall have made any demand pursuant to the provisions of this Section 6.04, shall be entitled and empowered, by intervention in such proceedings or otherwise, to file and prove a claim or claims for the whole
amount of principal and accrued and unpaid interest, if any, in 

  
 32 

 
respect of the Notes, and, in case of any judicial proceedings, to file such proofs of claim and other papers or documents and to take such other actions as it may deem necessary or advisable in
order to have the claims of the Trustee (including any claim for the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel) and of the Holders allowed in such judicial proceedings relative to the
Company or any other obligor on the Notes, its or their creditors, or its or their property, and to collect and receive any monies or other property payable or deliverable on any such claims, and to distribute the same after the deduction of any
amounts due to the Trustee under Section 7.06; and any receiver, assignee or trustee in bankruptcy or reorganization, liquidator, custodian or similar official is hereby authorized by each of the Holders to make such payments to the Trustee, as
administrative expenses, and, in the event that the Trustee shall consent to the making of such payments directly to the Holders, to pay to the Trustee any amount due it for reasonable compensation, expenses, advances and disbursements, including
agents and counsel fees, and including any other amounts due to the Trustee under Section 7.06, incurred by it up to the date of such distribution. To the extent that such payment of reasonable compensation, expenses, advances and disbursements
out of the estate in any such proceedings shall be denied for any reason, payment of the same shall be secured by a lien on, and shall be paid out of, any and all distributions, dividends, monies, securities and other property that the Holders of
the Notes may be entitled to receive in such proceedings, whether in liquidation or under any plan of reorganization or arrangement or otherwise. 

Nothing herein contained shall be deemed to authorize the Trustee to authorize or consent to or accept or adopt on behalf of any Holder any
plan of reorganization, arrangement, adjustment or composition affecting such Holder or the rights of any Holder thereof, or to authorize the Trustee to vote in respect of the claim of any Holder in any such proceeding. 

All rights of action and of asserting claims under this Indenture, or under any of the Notes, may be enforced by the Trustee without the
possession of any of the Notes, or the production thereof at any trial or other proceeding relative thereto, and any such suit or proceeding instituted by the Trustee shall be brought in its own name as trustee of an express trust, and any recovery
of judgment shall, after provision for the payment of the reasonable compensation, expenses, disbursements and advances of the Trustee, its agents and counsel, be for the ratable benefit of the Holders of the Notes. 

In any proceedings brought by the Trustee (and in any proceedings involving the interpretation of any provision of this Indenture to which the
Trustee shall be a party) the Trustee shall be held to represent all the Holders of the Notes, and it shall not be necessary to make any Holders of the Notes parties to any such proceedings. 

In case the Trustee shall have proceeded to enforce any right under this Indenture and such proceedings shall have been discontinued or
abandoned because of any waiver pursuant to Section 6.09 or any rescission and annulment pursuant to Section 6.02 or for any other reason or shall have been determined adversely to the Trustee, then and in every such case the Company, the
Holders and the Trustee shall, subject to any determination in such proceeding, be restored respectively to their several positions and rights hereunder, and all rights, remedies and powers of the Company, the Holders and the Trustee shall continue
as though no such proceeding had been instituted. 

  
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 Section 6.05. Application of Monies Collected by Trustee. Any monies or property
collected by the Trustee pursuant to this Article 6 with respect to the Notes shall be applied in the following order, at the date or dates fixed by the Trustee for the distribution of such monies or property, upon presentation of the several Notes,
and stamping thereon the payment, if only partially paid, and upon surrender thereof, if fully paid: 
 First, to the payment of all
amounts due the Trustee under Section 7.06; 
 Second, in case the principal of the outstanding Notes shall not have become due
and be unpaid, to the payment of interest on, and any cash due upon conversion of, the Notes in default in the order of the date due of the payments of such interest and cash due upon conversion, as the case may be, with interest (to the extent that
such interest has been collected by the Trustee) upon such overdue payments at the rate borne by the Notes at such time, such payments to be made ratably to the Persons entitled thereto; 

Third, in case the principal of the outstanding Notes shall have become due, by declaration or otherwise, and be unpaid to the payment
of the whole amount (including, if applicable, the payment of the Fundamental Change Repurchase Price and any cash due upon conversion) then owing and unpaid upon the Notes for principal and interest, if any, with interest on the overdue principal
and, to the extent that such interest has been collected by the Trustee, upon overdue installments of interest at the rate borne by the Notes at such time, and in case such monies shall be insufficient to pay in full the whole amounts so due and
unpaid upon the Notes, then to the payment of such principal (including, if applicable, the Fundamental Change Repurchase Price and the cash due upon conversion) and interest without preference or priority of principal over interest, or of interest
over principal or of any installment of interest over any other installment of interest, or of any Note over any other Note, ratably to the aggregate of such principal (including, if applicable, the Fundamental Change Repurchase Price and any cash
due upon conversion) and accrued and unpaid interest; and 
 Fourth, to the payment of the remainder, if any, to the Company or as a
court of competent jurisdiction may direct in a final non-appealable order. 
 Section 6.06. Proceedings by Holders. Except to
enforce the right to receive payment of principal (including, if applicable, the Fundamental Change Repurchase Price) or interest when due, or the right to receive payment or delivery of the consideration due upon conversion, no Holder of any Note
shall have any right by virtue of or by availing of any provision of this Indenture to institute any suit, action or proceeding in equity or at law upon or under or with respect to this Indenture, or for the appointment of a receiver, trustee,
liquidator, custodian or other similar official, or for any other remedy hereunder, unless: 
 (a) such Holder previously shall have given
to the Trustee written notice of an Event of Default and of the continuance thereof, as herein provided; 
 (b) Holders of at least 25% in
aggregate principal amount of the Notes then outstanding shall have made written request upon the Trustee to institute such action, suit or proceeding in its own name as Trustee hereunder; 

  
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 (c) such Holders shall have offered to the Trustee such indemnity or security satisfactory to it
against any loss, liability or expense to be incurred therein or thereby; 
 (d) the Trustee for 60 days after its receipt of such notice,
request and offer of such indemnity or security, shall have neglected or refused to institute any such action, suit or proceeding; and 

(e) no direction that, in the opinion of the Trustee, is inconsistent with such written request shall have been given to the Trustee by the
Holders of a majority of the aggregate principal amount of the Notes then outstanding within such 60-day period pursuant to Section 6.09, 
 it being
understood and intended, and being expressly covenanted by the taker and Holder of every Note with every other taker and Holder and the Trustee that no one or more Holders shall have any right in any manner whatever by virtue of or by availing of
any provision of this Indenture to affect, disturb or prejudice the rights of any other Holder, or to obtain or seek to obtain priority over or preference to any other such Holder, or to enforce any right under this Indenture, except in the manner
herein provided and for the equal, ratable and common benefit of all Holders (except as otherwise provided herein). For the protection and enforcement of this Section 6.06, each and every Holder and the Trustee shall be entitled to such relief
as can be given either at law or in equity. 
 Notwithstanding any other provision of this Indenture and any provision of any Note, the
right of any Holder to receive payment or delivery, as the case may be, of (x) the principal (including the Fundamental Change Repurchase Price, if applicable) of, (y) accrued and unpaid interest, if any, on, and (z) the consideration
due upon conversion of, such Note, on or after the respective due dates expressed or provided for in such Note or in this Indenture, or to institute suit for the enforcement of any such payment or delivery, as the case may be, on or after such
respective dates against the Company shall not be impaired or affected without the consent of such Holder. 
 Section 6.07.
Proceedings by Trustee. In case of an Event of Default, the Trustee may in its discretion proceed to protect and enforce the rights vested in it by this Indenture by such appropriate judicial proceedings as are necessary to protect and enforce
any of such rights, either by suit in equity or by action at law or by proceeding in bankruptcy or otherwise, whether for the specific enforcement of any covenant or agreement contained in this Indenture or in aid of the exercise of any power
granted in this Indenture, or to enforce any other legal or equitable right vested in the Trustee by this Indenture or by law. 

Section 6.08. Remedies Cumulative and Continuing. Except as provided in the last paragraph of Section 2.06, all powers and
remedies given by this Article 6 to the Trustee or to the Holders shall, to the extent permitted by law, be deemed cumulative and not exclusive of any thereof or of any other powers and remedies available to the Trustee or the Holders of the Notes,
by judicial proceedings or otherwise, to enforce the performance or observance of the covenants and agreements contained in this Indenture, and no delay or omission of the Trustee or of any Holder of any of the Notes to exercise any right or power
accruing upon any Default or Event of Default shall impair any such right or power, or shall be construed to be a waiver of any such 

  
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Default or Event of Default or any acquiescence therein; and, subject to the provisions of Section 6.06, every power and remedy given by this Article 6 or by law to the Trustee or to the
Holders may be exercised from time to time, and as often as shall be deemed expedient, by the Trustee or by the Holders. 

Section 6.09. Direction of Proceedings and Waiver of Defaults by Majority of Holders. The Holders of a majority of the aggregate
principal amount of the Notes at the time outstanding determined in accordance with Section 8.04 shall have the right to direct the time, method and place of conducting any proceeding for any remedy available to the Trustee or exercising any
trust or power conferred on the Trustee with respect to the Notes; provided, however, that (a) such direction shall not be in conflict with any rule of law or with this Indenture, and (b) the Trustee may take any other action
deemed proper by the Trustee that is not inconsistent with such direction. The Trustee may refuse to follow any direction that it determines is in conflict with any rule of law or this Indenture, is unduly prejudicial to the rights of any other
Holder or that would involve the Trustee in personal liability. The Holders of a majority in aggregate principal amount of the Notes at the time outstanding determined in accordance with Section 8.04 may on behalf of the Holders of all of the
Notes waive any past Default or Event of Default hereunder and its consequences except (i) a default in the payment of accrued and unpaid interest, if any, on, or the principal (including any Fundamental Change Repurchase Price) of, the Notes
when due that has not been cured pursuant to the provisions of Section 6.01, (ii) a failure by the Company to pay or deliver, as the case may be, the consideration due upon conversion of the Notes or (iii) a default in respect of a
covenant or provision hereof which under Article 10 cannot be modified or amended without the consent of each Holder of an outstanding Note affected. Upon any such waiver the Company, the Trustee and the Holders of the Notes shall be restored to
their former positions and rights hereunder; but no such waiver shall extend to any subsequent or other Default or Event of Default or impair any right consequent thereon. Whenever any Default or Event of Default hereunder shall have been waived as
permitted by this Section 6.09, said Default or Event of Default shall for all purposes of the Notes and this Indenture be deemed to have been cured and to be not continuing; but no such waiver shall extend to any subsequent or other Default or
Event of Default or impair any right consequent thereon. 
 Section 6.10. Notice of Defaults. The Trustee shall, within 90 days
after a Responsible Officer receives written notice of the occurrence and continuance of a Default of which it has actual knowledge, send to all Holders as the names and addresses of such Holders appear upon the Note Register, or, in the case of
Global Notes, electronically in accordance with the applicable procedures of the Depositary, notice of all such Defaults, unless such Defaults shall have been cured or waived before the giving of such notice; provided that, except in the case
of a Default in the payment of the principal of (including the Fundamental Change Repurchase Price, if applicable), or accrued and unpaid interest on, any of the Notes or a Default in the payment or delivery of the consideration due upon conversion,
the Trustee shall be protected in withholding such notice if and so long as it in good faith determines that the withholding of such notice is in the interests of the Holders. 

Section 6.11. Undertaking to Pay Costs. All parties to this Indenture agree, and each Holder of any Note by its acceptance thereof
shall be deemed to have agreed, that any court may, in its discretion, require, in any suit for the enforcement of any right or remedy under this Indenture, or in any suit against the Trustee for any action taken or omitted by it as Trustee, the

  
 36 

 
filing by any party litigant in such suit of an undertaking to pay the costs of such suit and that such court may in its discretion assess reasonable costs, including reasonable attorneys’
fees and expenses, against any party litigant in such suit, having due regard to the merits and good faith of the claims or defenses made by such party litigant; provided that the provisions of this Section 6.11 (to the extent permitted
by law) shall not apply to any suit instituted by the Trustee, to any suit instituted by any Holder, or group of Holders, holding in the aggregate more than 10% in principal amount of the Notes at the time outstanding determined in accordance with
Section 8.04, or to any suit instituted by any Holder for the enforcement of the payment of the principal of or accrued and unpaid interest, if any, on any Note (including, but not limited to, the Fundamental Change Repurchase Price with
respect to the Notes being repurchased as provided in this Indenture) on or after the due date expressed or provided for in such Note or to any suit for the enforcement of the right to convert any Note (including the right to receive the
consideration due upon conversion) in accordance with the provisions of Article 13. 
 ARTICLE 7 

CONCERNING THE TRUSTEE 

Section 7.01. Duties and Responsibilities of Trustee. The Trustee, prior to the occurrence of an Event of Default and after the
curing or waiver of all Events of Default that may have occurred, undertakes to perform such duties and only such duties as are specifically set forth in this Indenture. In the event an Event of Default has occurred and is continuing, the Trustee
shall exercise such of the rights and powers vested in it by this Indenture, and use the same degree of care and skill in its exercise, as a prudent person would exercise or use under the circumstances in the conduct of such person’s own
affairs; provided that if an Event of Default occurs and is continuing, the Trustee will be under no obligation to exercise any of the rights or powers under this Indenture at the request or direction of any of the Holders unless such Holders
have offered to the Trustee indemnity or security satisfactory to the Trustee against any loss, liability or expense that might be incurred by it in compliance with such request or direction. 

No provision of this Indenture shall be construed to relieve the Trustee from liability for its own grossly negligent action, its own grossly
negligent failure to act or its own willful misconduct, except that: 
 (a) prior to the occurrence of an Event of Default and after the
curing or waiving of all Events of Default that may have occurred: 
 (i) the duties and obligations of the Trustee shall be
determined solely by the express provisions of this Indenture, and the Trustee shall not be liable except for the performance of such duties and obligations as are specifically set forth in this Indenture and no implied covenants or obligations
shall be read into this Indenture against the Trustee; and 
 (ii) in the absence of bad faith or willful misconduct on the
part of the Trustee, the Trustee may conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon any certificates or opinions furnished to the Trustee and conforming to the requirements of this
Indenture; but, in the case of any such 

  
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certificates or opinions that by any provisions hereof are specifically required to be furnished to the Trustee, the Trustee shall be under a duty to examine the same to determine whether or not
they conform to the requirements of this Indenture (but need not confirm or investigate the accuracy of any mathematical calculations or other facts stated therein); 

(b) the Trustee shall not be liable for any error of judgment made in good faith by a Responsible Officer or Officers of the Trustee, unless
it shall be proved that the Trustee was grossly negligent in ascertaining the pertinent facts; 
 (c) the Trustee shall not be liable with
respect to any action taken or omitted to be taken by it in good faith in accordance with the direction of the Holders of not less than a majority of the aggregate principal amount of the Notes at the time outstanding determined as provided in
Section 8.04 relating to the time, method and place of conducting any proceeding for any remedy available to the Trustee, or exercising any trust or power conferred upon the Trustee, under this Indenture; 

(d) whether or not therein provided, every provision of this Indenture relating to the conduct or affecting the liability of, or affording
protection to, the Trustee shall be subject to the provisions of this Section; 
 (e) the Trustee shall not be liable in respect of any
payment (as to the correctness of amount, entitlement to receive or any other matters relating to payment) or notice effected by the Company or any Paying Agent or any records maintained by any co-Note Registrar with respect to the Notes; 

(f) if any party fails to deliver a notice relating to an event the fact of which, pursuant to this Indenture, requires notice to be sent to
the Trustee, the Trustee may conclusively rely on its failure to receive such notice as reason to act as if no such event occurred, unless a Responsible Officer of the Trustee has received written notice of such event; 

(g) in the absence of written investment direction from the Company, all cash received by the Trustee shall be placed in a non-interest
bearing trust account, and in no event shall the Trustee be liable for the selection of investments or for investment losses incurred thereon or for losses incurred as a result of the liquidation of any such investment prior to its maturity date or
the failure of the party directing such investments prior to its maturity date or the failure of the party directing such investment to provide timely written investment direction, and the Trustee shall have no obligation to invest or reinvest any
amounts held hereunder in the absence of such written investment direction from the Company; and 
 (h) in the event that the Trustee is
also acting as Custodian, Note Registrar, Paying Agent, Conversion Agent, Bid Solicitation Agent or transfer agent hereunder, the rights and protections afforded to the Trustee pursuant to this Article 7 shall also be afforded to such Custodian,
Note Registrar, Paying Agent, Conversion Agent, Bid Solicitation Agent or transfer agent. 

  
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 None of the provisions contained in this Indenture shall require the Trustee to expend or risk
its own funds or otherwise incur personal financial liability in the performance of any of its duties or in the exercise of any of its rights or powers. The Trustee shall not be required to give any bond or surety in respect of the performance of
its powers or duties hereunder. 
 Section 7.02. Reliance on Documents, Opinions, Etc. Except as otherwise provided in Section
7.01: 
 (a) the Trustee may conclusively rely and shall be fully protected in acting upon any resolution, certificate, statement,
instrument, opinion, report, notice, request, consent, order, bond, note, coupon or other paper or document believed by it in good faith to be genuine and to have been signed or presented by the proper party or parties; 

(b) any request, direction, order or demand of the Company mentioned herein shall be sufficiently evidenced by an Officer’s Certificate
(unless other evidence in respect thereof be herein specifically prescribed); and any Board Resolution may be evidenced to the Trustee by a copy thereof certified by the Secretary or an Assistant Secretary of the Company; 

(c) the Trustee may consult with counsel of its selection and require an Opinion of Counsel and any advice of such counsel or Opinion of
Counsel shall be full and complete authorization and protection in respect of any action taken or omitted by it hereunder in good faith and in accordance with such advice or Opinion of Counsel; 

(d) the Trustee shall not be bound to make any investigation into the facts or matters stated in any resolution, certificate, statement,
instrument, opinion, report, notice, request, direction, consent, order, bond, debenture or other paper or document, but the Trustee, in its discretion, may make such further inquiry or investigation into such facts or matters as it may see fit,
and, if the Trustee shall determine to make such further inquiry or investigation, it shall be entitled to examine the books, records and premises of the Company, personally or by agent or attorney at the expense of the Company and shall incur no
liability of any kind by reason of such inquiry or investigation; 
 (e) the Trustee may execute any of the trusts or powers hereunder or
perform any duties hereunder either directly or by or through agents, custodians, nominees or attorneys and the Trustee shall not be responsible for any misconduct or negligence on the part of any agent, custodian, nominee or attorney appointed by
it with due care hereunder; 
 (f) the permissive rights of the Trustee enumerated herein shall not be construed as duties; 

(g) the Trustee shall be under no obligation to exercise any of the rights or powers vested in it by this Indenture at the request or
direction of any of the Holders pursuant to this Indenture, unless such Holders shall have offered to the Trustee security or indemnity satisfactory to the Trustee against the costs, expenses and liabilities which might be incurred by it in
compliance with such request or direction; 

  
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 (h) the Trustee shall not be liable for any action taken, suffered, or omitted to be taken by it
in good faith and reasonably believed by it to be authorized or within the discretion or rights or powers conferred upon it by this Indenture; 

(i) the Trustee may request that the Company deliver a certificate setting forth the names of individuals and/or titles of officers authorized
at such time to take specified actions pursuant to this Indenture; and 
 (j) the Trustee shall not be obligated to take possession of any
Common Stock, whether upon conversion or in connection with any discharge of this Indenture pursuant to Article 3 hereof, but shall satisfy its obligation as Conversion Agent by working through the stock transfer agent of the Company from time to
time as directed by the Company. 
 In no event shall the Trustee be liable for any consequential loss or damage of any kind whatsoever
(including but not limited to lost profits), even if the Trustee has been advised of the likelihood of such loss or damage and regardless of the form of action other than any such loss or damage caused by the Trustee’s willful misconduct or
gross negligence. The Trustee shall not be charged with knowledge of any Default or Event of Default with respect to the Notes, unless either a Responsible Officer shall have received written notice of such Default or Event of Default by the Company
or by any Holder of the Notes. 
 Section 7.03. No Responsibility for Recitals, Etc. The recitals contained herein and in the
Notes (except in the Trustee’s certificate of authentication) shall be taken as the statements of the Company, and the Trustee assumes no responsibility for the correctness of the same. The Trustee makes no representations as to the validity or
sufficiency of this Indenture or of the Notes or of any Common Stock underlying the Notes. The Trustee shall not be accountable for the use or application by the Company of any Notes or the proceeds of any Notes authenticated and delivered by the
Trustee in conformity with the provisions of this Indenture. Neither the Trustee nor any of its agents will be accountable for the use or application by the Company of the Notes or the proceeds thereof, or for any funds received and disbursed in
accordance with this Indenture. The Trustee shall have no responsibility or liability with respect to any information, statement or recital in the Offering Memorandum or other disclosure material prepared or distributed with respect to the issuance
of the Notes. 
 Section 7.04. Trustee, Paying Agents, Conversion Agents, Bid Solicitation Agent or Note Registrar May Own
Notes. The Trustee, any Paying Agent, any Conversion Agent, Bid Solicitation Agent (if other than the Company) or Note Registrar, in its individual or any other capacity, may become the owner or pledgee of Notes with the same rights it would
have if it were not the Trustee, Paying Agent, Conversion Agent, Bid Solicitation Agent or Note Registrar. 
 Section 7.05. Monies
and Shares of Common Stock to Be Held in Trust. All monies and any shares of Common Stock received by the Trustee shall, until used or applied as herein provided, be held in trust for the purposes for which they were received. Money and shares
of Common Stock held by the Trustee in trust hereunder need not be segregated from other funds or property except to the extent required by law. The Trustee shall be under no liability for interest on any money or shares of Common Stock received by
it hereunder except as may be agreed from time to time by the Company and the Trustee. 

  
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 Section 7.06. Compensation and Expenses of Trustee. The Company covenants and agrees
to pay to the Trustee, in any capacity under this Indenture, from time to time, and the Trustee shall be entitled to, compensation for all services rendered by it hereunder in any capacity (which shall not be limited by any provision of law in
regard to the compensation of a trustee of an express trust) as mutually agreed to in writing between the Trustee and the Company, and the Company will pay or reimburse the Trustee upon its request for all reasonable expenses, disbursements and
advances reasonably incurred or made by the Trustee in accordance with any of the provisions of this Indenture in any capacity thereunder (including the reasonable compensation and the expenses and disbursements of its agents and counsel and of all
Persons not regularly in its employ) except any such expense, disbursement or advance as shall have been determined to have been caused by its own gross negligence, willful misconduct or bad faith, as determined by a final, non-appealable decision
of a court of competent jurisdiction. The Company also covenants to indemnify the Trustee in any capacity under this Indenture and any other document or transaction entered into in connection herewith and its officers, directors, employees and
agents and any authenticating agent for, and to hold them harmless against, any loss, claim, damage, liability or expense including taxes (other than taxes based upon, measured by or determined by the income of the Trustee) incurred without gross
negligence, willful misconduct or bad faith on the part of the Trustee, its officers, directors, agents or employees, or such agent or authenticating agent, as the case may be, as determined by a final, non-appealable decision of a court of
competent jurisdiction, and arising out of or in connection with the acceptance or administration of this Indenture or in any other capacity hereunder, including the costs and expenses of defending themselves against any claim of liability in the
premises. The obligations of the Company under this Section 7.06 to compensate or indemnify the Trustee and to pay or reimburse the Trustee for expenses, disbursements and advances shall be secured by a senior claim to which the Notes are
hereby made subordinate on all money or property held or collected by the Trustee, except, subject to the effect of Section 6.05, funds held in trust herewith for the benefit of the Holders of particular Notes. The Trustee’s right to
receive payment of any amounts due under this Section 7.06 shall not be subordinate to any other liability or indebtedness of the Company. The obligation of the Company under this Section 7.06 shall survive the satisfaction and discharge
of this Indenture and the earlier resignation or removal or the Trustee. The Company need not pay for any settlement made without its consent, which consent shall not be unreasonably withheld. The indemnification provided in this Section 7.06
shall extend to the officers, directors, agents and employees of the Trustee. 
 Without prejudice to any other rights available to the
Trustee under applicable law, when the Trustee and its agents and any authenticating agent incur expenses or render services after an Event of Default specified in Section 6.01(h) or Section 6.01(i) occurs, the expenses and the
compensation for the services are intended to constitute expenses of administration under any bankruptcy, insolvency or similar laws. 

Section 7.07. Officer’s Certificate as Evidence. Except as otherwise provided in Section 7.01, whenever in the
administration of the provisions of this Indenture the Trustee shall deem it necessary or desirable that a matter be proved or established prior to taking or omitting any action hereunder, such matter (unless other evidence in respect thereof be
herein specifically prescribed) may, in the absence of gross negligence, willful misconduct, recklessness and bad faith on the part of the Trustee, be deemed to be conclusively proved and established by an

  
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Officer’s Certificate delivered to the Trustee, and such Officer’s Certificate, in the absence of gross negligence, willful misconduct and bad faith on the part of the Trustee, shall be
full warrant to the Trustee for any action taken or omitted by it under the provisions of this Indenture upon the faith thereof. 

Section 7.08. Eligibility of Trustee. There shall at all times be a Trustee hereunder which shall be a Person that is eligible
pursuant to the Trust Indenture Act to act as such and has a combined capital and surplus of at least $50,000,000. If such Person publishes reports of condition at least annually, pursuant to law or to the requirements of any supervising or
examining authority, then for the purposes of this Section, the combined capital and surplus of such Person shall be deemed to be its combined capital and surplus as set forth in its most recent report of condition so published. If at any time the
Trustee shall cease to be eligible in accordance with the provisions of this Section, it shall resign immediately in the manner and with the effect hereinafter specified in this Article. 

Section 7.09. Resignation or Removal of Trustee. (a) The Trustee may at any time resign by giving written notice of such
resignation to the Company and by delivering notice thereof to the Holders as provided in this Indenture. Upon receiving such notice of resignation, the Company shall promptly appoint a successor trustee by written instrument, in duplicate, executed
by order of the Board of Directors, one copy of which instrument shall be delivered to the resigning Trustee and one copy to the successor trustee. If no successor trustee shall have been so appointed and have accepted appointment within 60 days
after the delivering of such notice of resignation to the Holders, the resigning Trustee may, upon ten Business Days’ notice to the Company and the Holders, petition any court of competent jurisdiction for the appointment of a successor
trustee, or any Holder who has been a bona fide holder of a Note or Notes for at least six months (or since the date of this Indenture) may, subject to the provisions of Section 6.11, on behalf of himself or herself and all others similarly
situated, petition any such court for the appointment of a successor trustee. Such court may thereupon, after such notice, if any, as it may deem proper and prescribe, appoint a successor trustee. 

(b) In case at any time any of the following shall occur: 

(i) the Trustee shall cease to be eligible in accordance with the provisions of Section 7.08 and shall fail to resign
after written request therefor by the Company or by any such Holder, or 
 (ii) the Trustee shall become incapable of acting,
or shall be adjudged a bankrupt or insolvent, or a receiver of the Trustee or of its property shall be appointed, or any public officer shall take charge or control of the Trustee or of its property or affairs for the purpose of rehabilitation,
conservation or liquidation, 
 then, in either case, the Company may by a Board Resolution remove the Trustee and appoint a successor trustee by written
instrument, in duplicate, executed by order of the Board of Directors, one copy of which instrument shall be delivered to the Trustee so removed and one copy to the successor trustee, or, subject to the provisions of Section 6.11, any Holder
who has been a bona fide holder of a Note or Notes for at least six months (or since the date of this Indenture) may, on behalf of himself or herself and all others similarly situated, petition any court of competent

  
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jurisdiction for the removal of the Trustee and the appointment of a successor trustee. Such court may thereupon, after such notice, if any, as it may deem proper and prescribe, remove the
Trustee and appoint a successor trustee. 
 (c) The Holders of a majority in aggregate principal amount of the Notes at the time
outstanding, as determined in accordance with Section 8.04, may at any time remove the Trustee and nominate a successor trustee that shall be deemed appointed as successor trustee unless within ten days after notice to the Company of such
nomination the Company objects thereto, in which case the Trustee so removed or any Holder, upon the terms and conditions and otherwise as in Section 7.09(a) provided, may petition any court of competent jurisdiction for an appointment of a
successor trustee. 
 (d) Any resignation or removal of the Trustee and appointment of a successor trustee pursuant to any of the provisions
of this Section 7.09 shall become effective upon acceptance of appointment by the successor trustee as provided in Section 7.10. 

Section 7.10. Acceptance by Successor Trustee. Any successor trustee appointed as provided in Section 7.09 shall execute,
acknowledge and deliver to the Company and to its predecessor trustee an instrument accepting such appointment hereunder, and thereupon the resignation or removal of the predecessor trustee shall become effective and such successor trustee, without
any further act, deed or conveyance, shall become vested with all the rights, powers, duties and obligations of its predecessor hereunder, with like effect as if originally named as Trustee herein; but, nevertheless, on the written request of the
Company or of the successor trustee, the trustee ceasing to act shall, upon payment of any amounts then due it pursuant to the provisions of Section 7.06, execute and deliver an instrument transferring to such successor trustee all the rights
and powers of the trustee so ceasing to act. Upon request of any such successor trustee, the Company shall execute any and all instruments in writing for more fully and certainly vesting in and confirming to such successor trustee all such rights
and powers. Any trustee ceasing to act shall, nevertheless, retain a senior claim to which the Notes are hereby made subordinate on all money or property held or collected by such trustee as such, except for funds held in trust for the benefit of
Holders of particular Notes, to secure any amounts then due it pursuant to the provisions of Section 7.06. 
 No successor trustee
shall accept appointment as provided in this Section 7.10 unless at the time of such acceptance such successor trustee shall be eligible under the provisions of Section 7.08. 

Upon acceptance of appointment by a successor trustee as provided in this Section 7.10, each of the Company and the successor trustee, at
the written direction and at the expense of the Company shall deliver or cause to be delivered notice of the succession of such trustee hereunder to the Holders as provided in this Indenture. If the Company fails to deliver such notice within ten
days after acceptance of appointment by the successor trustee, the successor trustee shall cause such notice to be delivered at the expense of the Company. 

Section 7.11. Succession by Merger, Etc. Any corporation or other entity into which the Trustee may be merged or converted or with
which it may be consolidated, or any corporation or other entity resulting from any merger, conversion or consolidation to which the Trustee shall be 

  
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a party, or any corporation or other entity succeeding to all or substantially all of the corporate trust business of the Trustee (including the administration of this Indenture), shall be the
successor to the Trustee hereunder without the execution or filing of any paper or any further act on the part of any of the parties hereto; provided that in the case of any corporation or other entity succeeding to all or substantially all
of the corporate trust business of the Trustee such corporation or other entity shall be eligible under the provisions of Section 7.08. 

In case at the time such successor to the Trustee shall succeed to the trusts created by this Indenture, any of the Notes shall have been
authenticated but not delivered, any such successor to the Trustee may adopt the certificate of authentication of any predecessor trustee or authenticating agent appointed by such predecessor trustee, and deliver such Notes so authenticated; and in
case at that time any of the Notes shall not have been authenticated, any successor to the Trustee or an authenticating agent appointed by such successor trustee may authenticate such Notes either in the name of any predecessor trustee hereunder or
in the name of the successor trustee; and in all such cases such certificates shall have the full force which it is anywhere in the Notes or in this Indenture provided that the certificate of the Trustee shall have; provided, however,
that the right to adopt the certificate of authentication of any predecessor trustee or to authenticate Notes in the name of any predecessor trustee shall apply only to its successor or successors by merger, conversion or consolidation. 

Section 7.12. Trustee’s Application for Instructions from the Company. Any application by the Trustee for written
instructions from the Company (other than with regard to any action proposed to be taken or omitted to be taken by the Trustee that affects the rights of the Holders of the Notes under this Indenture) may, at the option of the Trustee, set forth in
writing any action proposed to be taken or omitted by the Trustee under this Indenture and the date on and/or after which such action shall be taken or such omission shall be effective. The Trustee shall not be liable to the Company for any action
taken by, or omission of, the Trustee in accordance with a proposal included in such application on or after the date specified in such application. 

ARTICLE 8 

CONCERNING THE HOLDERS 

Section 8.01. Action by Holders. Whenever in this Indenture it is provided that the Holders of a specified percentage of the
aggregate principal amount of the Notes may take any action (including the making of any demand or request, the giving of any notice, consent or waiver or the taking of any other action), the fact that at the time of taking any such action, the
Holders of such specified percentage have joined therein may be evidenced (a) by any instrument or any number of instruments of similar tenor executed by Holders in person or by agent or proxy appointed in writing, or (b) by the record of
the Holders voting in favor thereof at any meeting of Holders duly called and held in accordance with the provisions of Article 9, or (c) by a combination of such instrument or instruments and any such record of such a meeting of Holders.
Whenever the Company or the Trustee solicits the taking of any action by the Holders of the Notes, the Company or the Trustee may, but shall not be required to, fix in advance of such solicitation, a date as the record date for determining Holders
entitled to take such action. The record date if one is selected shall be not more than fifteen days prior to the date of commencement of solicitation of such action. 

  
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 Section 8.02. Proof of Execution by Holders. Subject to the provisions of
Section 7.01, Section 7.02 and Section 9.05, proof of the execution of any instrument by a Holder or its agent or proxy shall be sufficient if made in accordance with such reasonable rules and regulations as may be prescribed by the
Trustee or in such manner as shall be satisfactory to the Trustee. The holding of Notes shall be proved by the Note Register or by a certificate of the Note Registrar. The record of any Holders’ meeting shall be proved in the manner provided in
Section 9.06. 
 Section 8.03. Who Are Deemed Absolute Owners. The Company, the Trustee, any authenticating agent, any
Paying Agent, any Conversion Agent and any Note Registrar may deem the Person in whose name a Note shall be registered upon the Note Register to be, and may treat it as, the absolute owner of such Note (whether or not such Note shall be overdue and
notwithstanding any notation of ownership or other writing thereon made by any Person other than the Company or any Note Registrar) for the purpose of receiving payment of or on account of the principal of and (subject to Section 2.03) accrued
and unpaid interest on such Note, for conversion of such Note and for all other purposes under this Indenture; and neither the Company nor the Trustee nor any Paying Agent nor any Conversion Agent nor any Note Registrar shall be affected by any
notice to the contrary. The sole registered holder of a Global Note shall be the Depositary or its nominee. All such payments or deliveries so made to any Holder for the time being, or upon its order, shall be valid, and, to the extent of the sums
or shares of Common Stock so paid or delivered, effectual to satisfy and discharge the liability for monies payable or shares deliverable upon any such Note. Notwithstanding anything to the contrary in this Indenture or the Notes following an Event
of Default, any owner of a beneficial interest in a Global Note may directly enforce against the Company, without the consent, solicitation, proxy, authorization or any other action of the Depositary or any other Person, such Holder’s right to
exchange such beneficial interest for a Note in certificated form in accordance with the provisions of this Indenture. 

Section 8.04. Company-Owned Notes Disregarded. In determining whether the Holders of the requisite aggregate principal amount of
Notes have concurred in any direction, consent, waiver or other action under this Indenture, Notes that are owned by the Company, by any Subsidiary thereof or by any Person directly or indirectly controlling or controlled by or under direct or
indirect common control with the Company or any Subsidiary thereof shall be disregarded and deemed not to be outstanding for the purpose of any such determination; provided that for the purposes of determining whether the Trustee shall be
protected in relying on any such direction, consent, waiver or other action only Notes that a Responsible Officer actually knows are so owned shall be so disregarded. Notes so owned that have been pledged in good faith may be regarded as outstanding
for the purposes of this Section 8.04 if the pledgee shall establish to the satisfaction of the Trustee the pledgee’s right to so act with respect to such Notes and that the pledgee is not the Company, a Subsidiary thereof or a Person
directly or indirectly controlling or controlled by or under direct or indirect common control with the Company or a Subsidiary thereof. In the case of a dispute as to such right, any decision or indecision by the Trustee taken upon the advice of
counsel shall be full protection to the Trustee. Upon request of the Trustee, the Company shall furnish to the Trustee promptly an Officer’s Certificate listing and identifying all Notes, if any, known by the Company to be owned or held

  
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by or for the account of any of the above described Persons; and, subject to Section 7.01, the Trustee shall be entitled to accept such Officer’s Certificate as conclusive evidence of
the facts therein set forth and of the fact that all Notes not listed therein are outstanding for the purpose of any such determination. 

Section 8.05. Revocation of Consents; Future Holders Bound. At any time prior to (but not after) the evidencing to the Trustee, as
provided in Section 8.01, of the taking of any action by the Holders of the percentage of the aggregate principal amount of the Notes specified in this Indenture in connection with such action, any Holder of a Note that is shown by the evidence
to be included in the Notes the Holders of which have consented to such action may, by filing written notice with the Trustee at its Corporate Trust Office and upon proof of holding as provided in Section 8.02, revoke such action so far as
concerns such Note. Except as aforesaid, any such action taken by the Holder of any Note shall be conclusive and binding upon such Holder and upon all future Holders and owners of such Note and of any Notes issued in exchange or substitution
therefor or upon registration of transfer thereof, irrespective of whether any notation in regard thereto is made upon such Note or any Note issued in exchange or substitution therefor or upon registration of transfer thereof. 

ARTICLE 9 

HOLDERS’ MEETINGS 

Section 9.01. Purpose of Meetings. A meeting of Holders may be called at any time and from time to time pursuant to the provisions
of this Article 9 for any of the following purposes: 
 (a) to give any notice to the Company or to the Trustee or to give any directions to
the Trustee permitted under this Indenture, or to consent to the waiving of any Default or Event of Default hereunder (in each case, as permitted under this Indenture) and its consequences, or to take any other action authorized to be taken by
Holders pursuant to any of the provisions of Article 6; 
 (b) to remove the Trustee and nominate a successor trustee pursuant to the
provisions of Article 7; 
 (c) to consent to the execution of an indenture or indentures supplemental hereto pursuant to the provisions of
Section 10.02; or 
 (d) to take any other action authorized to be taken by or on behalf of the Holders of any specified aggregate
principal amount of the Notes under any other provision of this Indenture or under applicable law. 
 Section 9.02. Call of Meetings
by Trustee. The Trustee may at any time call a meeting of Holders to take any action specified in Section 9.01, to be held at such time and at such place as the Trustee shall determine. Notice of every meeting of the Holders, setting forth
the time and the place of such meeting and in general terms the action proposed to be taken at such meeting and the establishment of any record date pursuant to Section 8.01, shall be delivered electronically or mailed to Holders of such Notes
at their addresses as they shall appear on the Note Register. Such notice shall also be mailed to the Company. Such notices shall be delivered not less than 20 nor more than 90 days prior to the date fixed for the meeting. 

  
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 Any meeting of Holders shall be valid without notice if the Holders of all Notes then outstanding
are present in person or by proxy or if notice is waived before or after the meeting by the Holders of all Notes then outstanding, and if the Company and the Trustee are either present by duly authorized representatives or have, before or after the
meeting, waived notice. 
 Section 9.03. Call of Meetings by Company or Holders. In case at any time the Company, pursuant to a
Board Resolution, or the Holders of at least 10% of the aggregate principal amount of the Notes then outstanding, shall have requested the Trustee to call a meeting of Holders, by written request setting forth in reasonable detail the action
proposed to be taken at the meeting, and the Trustee shall not have delivered the notice of such meeting within 20 days after receipt of such request, then the Company or such Holders may determine the time and the place for such meeting and may
call such meeting to take any action authorized in Section 9.01, by delivering notice thereof as provided in Section 9.02. 

Section 9.04. Qualifications for Voting. To be entitled to vote at any meeting of Holders a Person shall (a) be a Holder of
one or more Notes on the record date pertaining to such meeting or (b) be a Person appointed by an instrument in writing as proxy by a Holder of one or more Notes on the record date pertaining to such meeting. The only Persons who shall be
entitled to be present or to speak at any meeting of Holders shall be the Persons entitled to vote at such meeting and their counsel and any representatives of the Trustee and its counsel and any representatives of the Company and its counsel. 

Section 9.05. Regulations. Notwithstanding any other provisions of this Indenture, the Trustee may make such reasonable
regulations as it may deem advisable for any meeting of Holders, in regard to proof of the holding of Notes and of the appointment of proxies, and in regard to the appointment and duties of inspectors of votes, the submission and examination of
proxies, certificates and other evidence of the right to vote, and such other matters concerning the conduct of the meeting as it shall think fit. 

The Trustee shall, by an instrument in writing, appoint a temporary chairman of the meeting, unless the meeting shall have been called by the
Company or by Holders as provided in Section 9.03, in which case the Company or the Holders calling the meeting, as the case may be, shall in like manner appoint a temporary chairman. A permanent chairman and a permanent secretary of the
meeting shall be elected by vote of the Holders of a majority in aggregate principal amount of the Notes represented at the meeting and entitled to vote at the meeting. 

Subject to the provisions of Section 8.04, at any meeting of Holders each Holder or proxyholder shall be entitled to one vote for each
$1,000 principal amount of Notes held or represented by him or her; provided, however, that no vote shall be cast or counted at any meeting in respect of any Note challenged as not outstanding and ruled by the chairman of the meeting
to be not outstanding. The chairman of the meeting shall have no right to vote other than by virtue of Notes held by it or instruments in writing as aforesaid duly designating it as the proxy to vote on behalf of other Holders. Any meeting of
Holders duly called pursuant to the provisions of Section 9.02 or Section 9.03 may be adjourned from time to time by the Holders of a majority of the aggregate principal amount of Notes represented at the meeting, whether or not
constituting a quorum, and the meeting may be held as so adjourned without further notice. 

  
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 Section 9.06. Voting. The vote upon any resolution submitted to any meeting of
Holders shall be by written ballot on which shall be subscribed the signatures of the Holders or of their representatives by proxy and the outstanding aggregate principal amount of the Notes held or represented by them. The permanent chairman of the
meeting shall appoint two inspectors of votes who shall count all votes cast at the meeting for or against any resolution and who shall make and file with the secretary of the meeting their verified written reports in duplicate of all votes cast at
the meeting. A record in duplicate of the proceedings of each meeting of Holders shall be prepared by the secretary of the meeting and there shall be attached to said record the original reports of the inspectors of votes on any vote by ballot taken
thereat and affidavits by one or more Persons having knowledge of the facts setting forth a copy of the notice of the meeting and showing that said notice was mailed as provided in Section 9.02. The record shall show the aggregate principal
amount of the Notes voting in favor of or against any resolution. The record shall be signed and verified by the affidavits of the permanent chairman and secretary of the meeting and one of the duplicates shall be delivered to the Company and the
other to the Trustee to be preserved by the Trustee, the latter to have attached thereto the ballots voted at the meeting. 
 Any record so
signed and verified shall be conclusive evidence of the matters therein stated. 
 Section 9.07. No Delay of Rights by Meeting.
Nothing contained in this Article 9 shall be deemed or construed to authorize or permit, by reason of any call of a meeting of Holders or any rights expressly or impliedly conferred hereunder to make such call, any hindrance or delay in the exercise
of any right or rights conferred upon or reserved to the Trustee or to the Holders under any of the provisions of this Indenture or of the Notes. Nothing contained in this Article 9 shall be deemed or construed to limit any Holder’s actions
pursuant to the applicable procedures of the Depositary so long as the Notes are Global Notes. 
 ARTICLE 10 

SUPPLEMENTAL INDENTURES 

Section 10.01. Supplemental Indentures Without Consent of Holders. The Company and the Trustee, at the Company’s expense, may
from time to time and at any time enter into an indenture or indentures supplemental hereto for one or more of the following purposes: 

(a) to cure any ambiguity, omission, defect or inconsistency in this Indenture or the Notes in a manner that does not, individually or in the
aggregate, materially adversely affect the rights of any Holder; 
 (b) to provide for the assumption by a Successor Company of the
obligations of the Company under this Indenture and the Notes pursuant to Article 11; 
 (c) to add guarantees with respect to the Notes;

  
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 (d) to secure the Notes; 

(e) to add to the covenants or Events of Defaults of the Company for the benefit of the Holders or surrender any right or power conferred upon
the Company; 
 (f) to make any change that does not adversely affect the rights of any Holder; 

(g) to increase the Conversion Rate as provided in this Indenture; 

(h) to provide for the acceptance of appointment by a successor trustee pursuant to Section 7.09 or to facilitate the administration of
the trusts by more than one trustee; 
 (i) to irrevocably elect a Settlement Method and/or irrevocably elect a minimum Specified Dollar
Amount, or to eliminate the Company’s right to elect a Settlement Method; 
 (j) in connection with any Merger Event, provide that the
Notes are convertible into Reference Property, subject to the provisions of Section 13.02, and make such related changes to the terms of the Notes to the extent expressly required by Section 13.07; or 

(k) to conform the provisions of this Indenture or the Notes to the “Description of Notes” section of the Offering Memorandum. 

Upon the written request of the Company, the Trustee is hereby authorized to, and shall join with the Company in the execution of any such
supplemental indenture, to make any further appropriate agreements and stipulations that may be therein contained, except that the Trustee shall not be obligated to, but may in its discretion, enter into any supplemental indenture that affects the
Trustee’s own rights, duties or immunities under this Indenture or otherwise. 
 Any supplemental indenture authorized by the
provisions of this Section 10.01 may be executed by the Company and the Trustee without the consent of the Holders of any of the Notes at the time outstanding, notwithstanding any of the provisions of Section 10.02. After any such
supplemental indenture becomes effective, the Company shall mail to the Holders and the Trustee a notice briefly describing such supplemental indenture. However, the failure to give such notice to all the Holders, or any defect in the notice, will
not impair or affect the validity of the supplemental indenture. 
 Section 10.02. Supplemental Indentures with Consent of
Holders. With the consent (evidenced as provided in Article 8) of the Holders of at least a majority of the aggregate principal amount of the Notes then outstanding (determined in accordance with Article 8 and including, without limitation,
consents obtained in connection with a repurchase of, or tender or exchange offer for, Notes), the Company and the Trustee, at the Company’s expense, may from time to time and at any time enter into an indenture or indentures supplemental
hereto for the purpose of adding any provisions to or changing in any manner or eliminating any of the provisions of this Indenture or any supplemental indenture or of modifying in any manner the rights of the Holders; provided,
however, that, without the consent of each Holder of an outstanding Note affected, no such supplemental indenture shall: 
 (a)
reduce the amount of Notes whose Holders must consent to an amendment; 

  
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 (b) reduce the rate of or extend the stated time for payment of interest on any Note; 

(c) reduce the principal of or extend the Maturity Date of any Note; 

(d) make any change that impairs or adversely affects the conversion rights of any Notes; 

(e) reduce the Fundamental Change Repurchase Price of any Note or amend or modify in any manner adverse to the Holders the Company’s
obligation to make such payments, whether through an amendment or waiver of provisions in the covenants, definitions or otherwise; 
 (f)
make any Note payable in a currency or at a place of payment other than that stated in the Note; 
 (g) change the ranking of the Notes;

 (h) impair the right of any Holder to receive payment of principal and interest on such Holder’s Notes on or after the due dates
therefor or to institute suit for the enforcement of any payment on or with respect to such Holder’s Notes; or 
 (i) make any change
in this Article 10 that requires each Holder’s consent or in the waiver provisions in Section 6.02 or Section 6.09. 
 Upon
the written request of the Company, and upon the filing with the Trustee of evidence of the consent of Holders as aforesaid and subject to Section 10.05, the Trustee shall join with the Company in the execution of such supplemental indenture
unless such supplemental indenture affects the Trustee’s own rights, duties or immunities under this Indenture or otherwise, in which case the Trustee may in its discretion, but shall not be obligated to, enter into such supplemental indenture.

 Holders do not need under this Section 10.02 to approve the particular form of any proposed supplemental indenture. It shall be
sufficient if such Holders approve the substance thereof. After any such supplemental indenture becomes effective, the Company shall mail to the Holders a notice briefly describing such supplemental indenture. However, the failure to give such
notice to all the Holders, or any defect in the notice, will not impair or affect the validity of the supplemental indenture. 

Section 10.03. Effect of Supplemental Indentures. Upon the execution of any supplemental indenture pursuant to the provisions of
this Article 10, this Indenture shall be and be deemed to be modified and amended in accordance therewith and the respective rights, limitation of rights, obligations, duties and immunities under this Indenture of the Trustee, the Company and the
Holders shall thereafter be determined, exercised and enforced hereunder subject in all respects to such modifications and amendments and all the terms and conditions of any such supplemental indenture shall be and be deemed to be part of the terms
and conditions of this Indenture for any and all purposes. 

  
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 Section 10.04. Notation on Notes. Notes authenticated and delivered after the
execution of any supplemental indenture pursuant to the provisions of this Article 10 may, at the Company’s expense, bear a notation in form approved by the Trustee as to any matter provided for in such supplemental indenture. If the Company or
the Trustee shall so determine, new Notes so modified as to conform, in the opinion of the Trustee and the Board of Directors, to any modification of this Indenture contained in any such supplemental indenture may, at the Company’s expense, be
prepared and executed by the Company, authenticated by the Trustee (or an authenticating agent duly appointed by the Trustee pursuant to Section 16.10) and delivered in exchange for the Notes then outstanding, upon surrender of such Notes then
outstanding. 
 Section 10.05. Evidence of Compliance of Supplemental Indenture to Be Furnished Trustee. In addition to the
documents required by Section 16.05, the Trustee shall receive an Officer’s Certificate and an Opinion of Counsel as conclusive evidence that any supplemental indenture executed pursuant hereto complies with the requirements of this
Article 10 and is permitted or authorized by this Indenture and that the supplemental indenture constitutes the valid and binding obligation of the Company, enforceable in accordance with its terms, subject to customary bankruptcy exceptions for
opinions of this type. 
 ARTICLE 11 

CONSOLIDATION, MERGER, SALE, CONVEYANCE AND LEASE 

Section 11.01. Company May Consolidate, Etc. on Certain Terms. Subject to the provisions of Section 11.02, the Company shall
not, in a transaction or series of transactions, consolidate with, merge with or into, or sell, convey, transfer or lease all or substantially all of the Company’s properties and assets to, another Person (other than one or more of the
Company’s direct or indirect Domestic Subsidiaries), unless: 
 (a) either (i) the Company is the Person surviving such merger or
consolidation, or (ii) the Person (if not the Company) formed by such consolidation or into which the Company is merged or the Person which acquires by conveyance or transfer, or which leases, all or substantially all of the Company’s
properties and assets (such Person or such Person described in clause (ii), the “Successor Company”) shall be a corporation organized and existing under the laws of the United States of America, any State thereof or the District of
Columbia, and the Successor Company (if not the Company) shall expressly assume by supplemental indenture all of the obligations of the Company under the Notes and this Indenture; and 

(b) immediately after giving effect to such transaction, no Default or Event of Default shall have occurred and be continuing under this
Indenture. 
 Section 11.02. Successor Corporation to Be Substituted. In case of any such consolidation, merger, sale,
conveyance, transfer or lease in which there is a Successor Company and upon the assumption by the Successor Company, by supplemental indenture, executed and delivered to the Trustee and satisfactory in form to the Trustee, of the due and punctual
payment of the principal of and accrued and unpaid interest on all of the Notes, the due and punctual delivery or payment, as the case may be, of any consideration due upon conversion of the Notes and the due and punctual performance of all of the
covenants and conditions of this Indenture to be performed by the Company, such Successor Company (if not the Company or any of the Company’s direct or indirect Domestic Subsidiaries) shall succeed to and, except in the case of a

  
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lease of all or substantially all of the Company’s properties and assets shall be substituted for the Company, with the same effect as if it had been named herein as the party of the first
part. Such Successor Company thereupon may cause to be signed, and may issue either in its own name or in the name of the Company any or all of the Notes issuable hereunder which theretofore shall not have been signed by the Company and delivered to
the Trustee; and, upon the order of such Successor Company instead of the Company and subject to all the terms, conditions and limitations in this Indenture prescribed, the Trustee shall authenticate and shall deliver, or cause to be authenticated
and delivered, any Notes that previously shall have been signed and delivered by the Officers of the Company to the Trustee for authentication, and any Notes that such Successor Company thereafter shall cause to be signed and delivered to the
Trustee for that purpose. All the Notes so issued shall in all respects have the same legal rank and benefit under this Indenture as the Notes theretofore or thereafter issued in accordance with the terms of this Indenture as though all of such
Notes had been issued at the date of the execution hereof. In the event of any such consolidation, merger, sale, conveyance or transfer (but not in the case of a lease), upon compliance with this Article 11 the Person named as the
“Company” in the first paragraph of this Indenture (or any successor that shall thereafter have become such in the manner prescribed in this Article 11) may be dissolved, wound up and liquidated at any time thereafter and, except in the
case of a lease, such Person shall be released from its liabilities as obligor and maker of the Notes and from its obligations under this Indenture and the Notes. 

In case of any such consolidation, merger, sale, conveyance, transfer or lease, such changes in phraseology and form (but not in substance)
may be made in the Notes thereafter to be issued as may be appropriate. 
 Section 11.03. Officer’s Certification and Opinion
of Counsel to Be Given to Trustee. No such consolidation, merger, sale, conveyance, transfer or lease shall be effective unless the Trustee shall receive an Officer’s Certificate and an Opinion of Counsel as conclusive evidence that any
such consolidation, merger, sale, conveyance, transfer or lease and any such assumption and, if a supplemental indenture is required in connection with such transaction, such supplemental indenture, complies with the provisions of this Article 11,
and in the case of the Opinion of Counsel, that such supplemental indenture is the valid and binding obligation of such Successor Company, enforceable in accordance with its terms, subject to customary bankruptcy exceptions for opinions of this
type. 
 ARTICLE 12 

IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND
DIRECTORS 
 Section 12.01. Indenture and Notes Solely Corporate Obligations. No recourse for the payment of the
principal of or accrued and unpaid interest on any Note, nor for any claim based thereon or otherwise in respect thereof, and no recourse under or upon any obligation, covenant or agreement of the Company in this Indenture or in any supplemental
indenture or in any Note, nor because of the creation of any indebtedness represented thereby, shall be had against any incorporator, stockholder, employee, agent, Officer or director or Subsidiary, as such, past, present or future, of the Company
or of any successor corporation, either directly or through the Company or any successor corporation, whether by virtue of any constitution, statute or rule of 

  
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law, or by the enforcement of any assessment or penalty or otherwise; it being expressly understood that all such liability is hereby expressly waived and released as a condition of, and as a
consideration for, the execution of this Indenture and the issue of the Notes. 
 ARTICLE 13 

CONVERSION OF NOTES 

Section 13.01. Conversion Privilege. (a) Subject to and upon compliance with the provisions of this Article 13, each Holder
of a Note 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 (i) subject to satisfaction of the conditions
described in Section 13.01(b), at any time prior to the close of business on the Business Day immediately preceding March 15, 2021 under the circumstances and during the periods set forth in Section 13.01(b), and (ii) regardless
of the conditions described in Section 13.01(b), on or after March 15, 2021 and prior to the close of business on the second Scheduled Trading Day immediately preceding the Maturity Date, in each case, at an initial conversion rate of
12.8793 shares of Common Stock (subject to adjustment as provided in this Article 13, the “Conversion Rate”) per $1,000 principal amount of Notes (subject to, and in accordance with, the settlement provisions of Section 13.02,
the “Conversion Obligation”). 
 (b) (i) Prior to the close of business on the Business Day immediately preceding
March 15, 2021, a Holder may surrender all or any portion of its Notes for conversion at any time during the five Business Day period immediately after any five consecutive Trading Day period (the “Measurement Period”) in which
the Trading Price per $1,000 principal amount of Notes, as determined following a request by a Holder of Notes in accordance with this Section 13.01(b)(i), for each Trading Day of the Measurement Period was less than 98% of the product of the
Last Reported Sale Price of the Common Stock and the Conversion Rate on each such Trading Day. The Trading Prices shall be determined by the Bid Solicitation Agent pursuant to this Section 13.01(b)(i) and the definition of Trading Price set
forth in this Indenture. The Company shall provide written notice to the Bid Solicitation Agent (if other than the Company) of the three independent nationally recognized securities dealers selected by the Company pursuant to the definition of
Trading Price, along with appropriate contact information for each, and shall direct such securities dealers to provide the required information to the Bid Solicitation Agent. The Bid Solicitation Agent (if other than the Company) shall have no
obligation to determine the Trading Price per $1,000 principal amount of Notes unless the Company has requested such determination in writing, and the Company shall have no obligation to make such request (or, if the Company is acting as Bid
Solicitation Agent, the Company shall have no obligation to determine the Trading Price per $1,000 principal amount of Notes) unless a Holder provides the Company with reasonable evidence that the Trading Price per $1,000 principal amount of Notes
would be less than 98% of the product of the Last Reported Sale Price of the Common Stock and the Conversion Rate, at which time the Company shall instruct the Bid Solicitation Agent (if other than the Company) to determine, or if the Company is
acting as Bid Solicitation Agent, the Company shall determine, the Trading Price per $1,000 principal amount of Notes beginning on the next Trading Day and on each successive Trading Day until the Trading Price per $1,000 principal amount of Notes
is greater than or equal to 98% of the 

  
 53 

 
product of the Last Reported Sale Price of the Common Stock and the Conversion Rate. If (x) the Company is not acting as Bid Solicitation Agent, and the Company does not instruct the Bid
Solicitation Agent to determine the Trading Price per $1,000 principal amount of Notes when obligated as provided in the preceding sentence, or if the Company instructs the Bid Solicitation Agent to obtain bids and the Bid Solicitation Agent fails
to make such determination, or (y) the Company is acting as Bid Solicitation Agent and the Company fails to make such determination when obligated as provided in the preceding sentence, then, in either case, the Trading Price per $1,000
principal amount of Notes shall be deemed to be less than 98% of the product of the Last Reported Sale Price of the Common Stock and the Conversion Rate on each Trading Day of such failure. If the Trading Price condition set forth above has been
met, the Company shall so notify the Holders, the Trustee and the Conversion Agent (if other than the Trustee) in writing. If, at any time after the Trading Price condition set forth above has been met, the Trading Price per $1,000 principal amount
of Notes is greater than or equal to 98% of the product of the Last Reported Sale Price of the Common Stock and the Conversion Rate for such date, the Company shall so notify the Holders of the Notes, the Trustee and the Conversion Agent (if other
than the Trustee) in writing. Other than as set forth above, none of the Trustee, the Bid Solicitation Agent or the Conversion Agent shall have any duty to determine or verify the Company’s determination of whether the Trading Price Condition
set forth above has been met. 
 (ii) If, prior to the close of business on the Business Day immediately preceding
March 15, 2021, the Company elects to: 
 (A) issue to all or substantially all holders of the Common Stock any rights,
options or warrants (other than in connection with a stockholder rights plan) entitling them, for a period of not more than 45 calendar days after the declaration date for such issuance, to subscribe for or purchase shares of the Common Stock at a
price per share that is less than the average of the Last Reported Sale Prices of the Common Stock for the 10 consecutive Trading Day period ending on, and including, the Trading Day immediately preceding the declaration date for such issuance; or

 (B) distribute to all or substantially all holders of the Common Stock the Company’s assets, securities or rights to
purchase securities of the Company, which distribution has a per share value, as reasonably determined by the Board of Directors, exceeding 10% of the Last Reported Sale Price of the Common Stock on the Trading Day immediately preceding the
declaration date for such distribution, 
 then, in either case, the Company shall notify all Holders of the Notes, the Trustee and the Conversion Agent (if
other than the Trustee) in writing at least 40 Scheduled Trading Days prior to the Ex-Dividend Date for such issuance or distribution. Once the Company has given such notice, a Holder may surrender all or any portion of its Notes for conversion at
any time until the earlier of (1) the close of business on the Business Day immediately preceding the Ex-Dividend Date for such issuance or distribution and (2) the Company’s announcement that such issuance or distribution will not
take place, in each case, even if the Notes are not otherwise convertible at such time. None of the Trustee, the Bid Solicitation Agent or the Conversion Agent shall have any duty to determine or verify the Company’s determination of whether an
issuance or distribution described in this clause (ii) has occurred. 

  
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 (iii) If (i) a transaction or event that constitutes (x) a Fundamental
Change or (y) a Make-Whole Fundamental Change occurs prior to the close of business on the Business Day immediately preceding March 15, 2021, regardless of whether a Holder has the right to require the Company to repurchase the Notes
pursuant to Section 14.02, or (ii) if the Company is a party to a consolidation, merger, binding share exchange, or transfer or lease of all or substantially all of its and its Subsidiaries’ assets, taken as a whole, prior to the
close of business on the Business Day immediately preceding March 15, 2021, pursuant to which the Common Stock would be converted into cash, securities or other assets, then, in each case, all or any portion of a Holder’s Notes may be
surrendered for conversion at any time after the effective date of such transaction or event (or, if later, the Business Day after the Company gives notice of such transaction or event pursuant to the succeeding sentence) until the 35th Trading Day
after the effective date of such transaction or event or, if such transaction or event also constitutes a Fundamental Change, until the related Fundamental Change Repurchase Date. The Company shall notify Holders, the Trustee and the Conversion
Agent (if other than the Trustee) in writing at least 10 Scheduled Trading Days prior to the anticipated effective date of such transaction or event, or, if the Company has not publicly announced such transaction or event at least 10 Scheduled
Trading Days prior to the anticipated effective date of such transaction or event, within one Business Day of the date the Company publicly announces such transaction or event, and in no event later than the actual effective date of such transaction
or event. None of the Trustee, the Bid Solicitation Agent or the Conversion Agent shall have any duty to determine or verify the Company’s determination of whether a Fundamental Change or a Make-Whole Fundamental Change has occurred. 

(iv) Prior to the close of business on the Business Day immediately preceding March 15, 2021, a Holder may surrender all
or any portion of its Notes for conversion at any time during any calendar quarter commencing after the calendar quarter ending on December 31, 2014 (and only during such calendar quarter), if the Last Reported Sale Price of the Common Stock
for at least 20 Trading Days (whether or not consecutive) during the period of 30 consecutive Trading Days ending on the last Trading Day of the immediately preceding calendar quarter is greater than or equal to 130% of the Conversion Price on each
applicable Trading Day. The Company shall determine at the beginning of each calendar quarter commencing after December 31, 2014 whether the Notes may be surrendered for conversion in accordance with this clause (iv) and shall notify the
Trustee and the Conversion Agent (if other than the Trustee) if the Notes become convertible in accordance with this clause (iv). None of the Trustee, the Bid Solicitation Agent or the Conversion Agent shall have any duty to determine or verify the
Company’s determination of whether the condition set forth in this clause (iv) has occurred. 

  
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 Section 13.02. Conversion Procedure; Settlement Upon Conversion. 

(a) Subject to this Section 13.02, Section 13.03(b) and Section 13.07(a), upon conversion of any Note, the Company shall pay or
deliver, as the case may be, to the converting Holder, in respect of each $1,000 principal amount of Notes being converted, cash (“Cash Settlement”), shares of Common Stock, together with cash, if applicable, in lieu of delivering
any fractional share of Common Stock in accordance with subsection (j) of this Section 13.02 (“Physical Settlement”) or a combination of cash and shares of Common Stock, together with cash, if applicable, in lieu of
delivering any fractional share of Common Stock in accordance with subsection (j) of this Section 13.02 (“Combination Settlement”), at its election, as set forth in this Section 13.02. 

(i) All conversions for which the relevant Conversion Date occurs on or after March 15, 2021 shall be settled using the
same Settlement Method. 
 (ii) Except for any conversions for which the relevant Conversion Date occurs on or after
March 15, 2021, the Company shall use the same Settlement Method for all conversions occurring on the same Conversion Date, but the Company shall not have any obligation to use the same Settlement Method with respect to conversions with
different Conversion Dates. 
 (iii) If, in respect of any Conversion Date (or the period described in the third immediately
succeeding set of parentheses, as the case may be), the Company elects to deliver a notice (the “Settlement Notice”) of the relevant Settlement Method in respect of such Conversion Date (or such period, as the case may be), the
Company, through the Trustee, shall deliver such Settlement Notice to converting Holders no later than the close of business on the Trading Day immediately following the relevant Conversion Date (or, in the case of any conversions for which the
relevant Conversion Date occurs on or after March 15, 2021, no later than the close of business on Scheduled Trading Day immediately preceding March 15, 2021). If the Company does not elect a Settlement Method prior to the deadline set
forth in the immediately preceding sentence, the Company shall no longer have the right to elect Cash Settlement or Physical Settlement with respect to such conversion or during such period and the Company shall be deemed to have elected Combination
Settlement in respect of its Conversion Obligation, and the Specified Dollar Amount per $1,000 principal amount of Notes shall be equal to $1,000. Such Settlement Notice shall specify the relevant Settlement Method and in the case of an election of
Combination Settlement, the relevant Settlement Notice shall indicate the Specified Dollar Amount per $1,000 principal amount of Notes. If the Company delivers a Settlement Notice electing Combination Settlement in respect of its Conversion
Obligation but does not indicate a Specified Dollar Amount per $1,000 principal amount of Notes in such Settlement Notice, the Specified Dollar Amount per $1,000 principal amount of Notes shall be deemed to be $1,000. 

  
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 (iv) The cash, shares of Common Stock or combination of cash and shares of Common
Stock in respect of any conversion of Notes (the “Settlement Amount”) shall be computed as follows: 
 (A)
if the Company elects to satisfy its Conversion Obligation in respect of such conversion by Physical Settlement, the Company shall deliver to the converting Holder in respect of each $1,000 principal amount of Notes being converted a number of
shares of Common Stock equal to the Conversion Rate in effect on the Conversion Date; 
 (B) if the Company elects to satisfy
its Conversion Obligation in respect of such conversion by Cash Settlement, the Company shall pay to the converting Holder in respect of each $1,000 principal amount of Notes being converted cash in an amount equal to the sum of the Daily Conversion
Values for each of the 30 consecutive Trading Days during the related Observation Period; and 
 (C) if the Company elects
(or is deemed to have elected) to satisfy its Conversion Obligation in respect of such conversion by Combination Settlement, the Company shall pay or deliver, as the case may be, in respect of each $1,000 principal amount of Notes being converted, a
Settlement Amount equal to the sum of the Daily Settlement Amounts for each of the 30 consecutive Trading Days during the related Observation Period. 

(v) The Daily Settlement Amounts (if applicable) and the Daily Conversion Values (if applicable) shall be determined by the
Company promptly following the last day of the Observation Period. Promptly after such determination of the Daily Settlement Amounts or the Daily Conversion Values, as the case may be, and the amount of cash payable in lieu of delivering any
fractional share of Common Stock, the Company shall notify the Trustee and the Conversion Agent (if other than the Trustee) of the Daily Settlement Amounts or the Daily Conversion Values, as the case may be, and the amount of cash payable in lieu of
delivering fractional shares of Common Stock. The Trustee and the Conversion Agent (if other than the Trustee) shall have no responsibility for any such determination. 

(vi) At any time prior to March 15, 2021, the Company may irrevocably elect Cash Settlement to satisfy its Conversion
Obligation in respect of Notes to be converted after the date of such election, or irrevocably elect Combination Settlement and a Specified Dollar Amount (which amount shall be at least $1,000 per $1,000 principal amount of Notes) to satisfy its
Conversion Obligation in respect of Notes to be converted after the date of such election. Upon making any election pursuant to this Section 13.02(a)(vi), the Company shall promptly (A) use its reasonable efforts to post information relating to
such election on its website or otherwise publicly disclose such information, and (B) give written notice of such election to the Holders of the Notes. 

(b) Subject to Section 13.02(e), before any Holder of a Note shall be entitled to convert a Note as set forth above, such Holder shall
(i) in the case of a Global Note, comply with the procedures of the Depositary in effect at that time and, if required, pay funds equal to interest payable on the next Interest Payment Date to which such Holder is not entitled as set forth in
Section 13.02(h) and (ii) in the case of a Physical Note (1) complete, manually sign and deliver an irrevocable notice to the Conversion Agent as set forth in the Form of Notice of Conversion (or a facsimile thereof) (a
“Notice of Conversion”) at the office of the Conversion Agent and state in writing therein the principal amount of Notes to be converted and the name or names 

  
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(with addresses) in which such Holder wishes the certificate or certificates for any shares of Common Stock to be delivered upon settlement of the Conversion Obligation to be registered,
(2) surrender such Notes, duly endorsed to the Company or in blank (and accompanied by appropriate endorsement and transfer documents), at the office of the Conversion Agent, (3) if required, furnish appropriate endorsements and transfer
documents and (4) if required, pay funds equal to interest payable on the next Interest Payment Date to which such Holder is not entitled as set forth in Section 13.02(h). The Trustee (and, if different, the Conversion Agent) shall notify
the Company of any conversion pursuant to this Article 13 on the Conversion Date for such conversion. No Notice of Conversion with respect to any Notes may be surrendered by a Holder thereof if such Holder has also delivered a Fundamental Change
Repurchase Notice to the Company in respect of such Notes and has not validly withdrawn such Fundamental Change Repurchase Notice in accordance with Section 14.03. 

If more than one Note shall be surrendered for conversion at one time by the same Holder, the Conversion Obligation with respect to such Notes
shall be computed on the basis of the aggregate principal amount of the Notes (or specified portions thereof to the extent permitted thereby) so surrendered. 

(c) A Note shall be deemed to have been converted immediately prior to the close of business on the date (the “Conversion
Date”) that the Holder has complied with the requirements set forth in subsection (b) above. The Company shall pay or deliver, as the case may be, the consideration due in respect of the Conversion Obligation on the third Business Day
immediately following the relevant Conversion Date, if the Company elects Physical Settlement, or on the third Business Day immediately following the last Trading Day of the relevant Observation Period, in the case of Cash Settlement or Combination
Settlement. If any shares of Common Stock are due to converting Holders, the Company shall issue or cause to be issued, and deliver to the Conversion Agent or to such Holder, or such Holder’s nominee or nominees, certificates or a book-entry
transfer through the Depositary for the full number of shares of Common Stock to which such Holder shall be entitled in satisfaction of the Company’s Conversion Obligation. 

(d) In case any Note shall be surrendered for partial conversion, the Company shall execute and the Trustee shall authenticate and deliver to
or upon the written order of the Holder of the Note so surrendered a new Note or Notes in authorized denominations in an aggregate principal amount equal to the unconverted portion of the surrendered Note, without payment of any service charge by
the converting Holder but, if required by the Company or Trustee, with payment of a sum sufficient to cover any documentary, stamp or similar issue or transfer tax or similar governmental charge required by law or that may be imposed in connection
therewith as a result of the name of the Holder of the new Notes issued upon such conversion being different from the name of the Holder of the old Notes surrendered for such conversion. 

(e) If a Holder submits a Note for conversion, the Company shall pay any documentary, stamp or similar issue or transfer tax due on the issue
of any shares of Common Stock upon conversion, unless the tax is due because the Holder requests such shares to be issued in a name other than the Holder’s name, in which case the Holder shall be required to pay that tax. The Conversion Agent
may refuse to deliver or refuse to instruct the stock transfer agent to deliver the certificates representing the shares of Common Stock being issued in a name other than the Holder’s name until the Trustee receives a sum sufficient to pay any
tax that is due by such Holder in accordance with the immediately preceding sentence. 

  
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 (f) Except as provided in Section 13.04, no adjustment shall be made for dividends on any
shares of Common Stock issued upon the conversion of any Note as provided in this Article 13. 
 (g) Upon the conversion of an interest in a
Global Note, the Trustee, or the Custodian at the direction of the Trustee, shall make a notation on such Global Note as to the reduction in the principal amount represented thereby. The Company shall notify the Trustee in writing of any conversion
of Notes effected through any Conversion Agent other than the Trustee. 
 (h) Upon conversion, a Holder shall not receive any separate cash
payment for accrued and unpaid interest, if any, except as set forth below. The Company’s settlement of the full Conversion Obligation shall be deemed to satisfy in full its obligation to pay the principal amount of the Note and accrued and
unpaid interest, if any, to, but excluding, the relevant Conversion Date. As a result, accrued and unpaid interest, if any, to, but excluding, the relevant Conversion Date shall be deemed to be paid in full rather than canceled, extinguished or
forfeited. Upon a conversion of Notes into a combination of cash and shares of Common Stock, accrued and unpaid interest will be deemed to be paid first out of the cash paid upon such conversion. Notwithstanding the foregoing, if Notes are converted
after the close of business on a Regular Record Date and prior to the open of business on the corresponding Interest Payment Date, Holders of such Notes as of the close of business on such Regular Record Date will receive the full amount of interest
payable on such Notes on the corresponding Interest Payment Date notwithstanding the conversion. Notes surrendered for conversion during the period from the close of business on any Regular Record Date to the open of business on the immediately
following Interest Payment Date must be accompanied by funds equal to the amount of interest payable on the Notes so converted; provided that no such payment shall be required (1) for conversions following the Regular Record Date
immediately preceding the Maturity Date; (2) if the Company has specified a Fundamental Change Repurchase Date that is after a Regular Record Date and on or prior to the Business Day immediately following the corresponding Interest Payment
Date; or (3) to the extent of any Defaulted Amounts, if any Defaulted Amounts exists at the time of conversion with respect to such Note. Therefore, for the avoidance of doubt, all Holders of record on the Regular Record Date immediately
preceding the Maturity Date or any Fundamental Change Repurchase Date as described in the immediately preceding sentence shall receive the full interest payment due on the Maturity Date or other applicable Interest Payment Date regardless of whether
their Notes have been converted following such Regular Record Date. 
 (i) Subject to Section 13.12, the Person in whose name the
certificate for any shares of Common Stock delivered upon conversion is registered shall be treated as a stockholder of record as of the close of business on the relevant Conversion Date (if the Company elects to satisfy the related Conversion
Obligation by Physical Settlement) or the last Trading Day of the relevant Observation Period (if the Company elects to satisfy the related Conversion Obligation by Combination Settlement), as the case may be. Upon a conversion of Notes, such Person
shall no longer be a Holder of such Notes surrendered for conversion. 

  
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 (j) The Company shall not issue any fractional share of Common Stock upon conversion of the Notes
and shall instead pay cash in lieu of delivering any fractional share of Common Stock issuable upon conversion based on the Daily VWAP for the relevant Conversion Date (in the case of Physical Settlement) or based on the Daily VWAP for the last
Trading Day of the relevant Observation Period (in the case of Combination Settlement). For each Note surrendered for conversion, if the Company has elected (or is deemed to have elected) Combination Settlement, the full number of shares that shall
be issued upon conversion thereof shall be computed on the basis of the aggregate Daily Settlement Amounts for the relevant Observation Period and any fractional shares remaining after such computation shall be paid in cash. 

Section 13.03. Increased Conversion Rate Applicable to Certain Notes Surrendered in Connection with Make-Whole Fundamental
Changes. (a) If a Make-Whole Fundamental Change occurs or becomes effective prior to the Maturity Date and a Holder elects to convert its Notes in connection with such Make-Whole Fundamental Change, the Company shall, under the
circumstances described below, increase the Conversion Rate for the Notes so surrendered for conversion by a number of additional shares of Common Stock (the “Additional Shares”), as described below. A conversion of Notes shall be
deemed for these purposes to be “in connection with” such Make-Whole Fundamental Change if the relevant Notice of Conversion is received by the Conversion Agent from, and including, the Effective Date of the Make-Whole Fundamental Change
up to, and including, the Business Day immediately prior to the related Fundamental Change Repurchase Date (or, in the case of a Make-Whole Fundamental Change that would have been a Fundamental Change but for subclause (i) of the proviso
in clause (b) of the definition thereof, the 35th Trading Day immediately following the Effective Date of such Make-Whole Fundamental Change). 

(b) Upon surrender of Notes for conversion in connection with a Make-Whole Fundamental Change pursuant to Section 13.01(b)(iii), the
Company shall, at its option, satisfy the related Conversion Obligation by Physical Settlement, Cash Settlement or Combination Settlement in accordance with Section 13.02 based on the Conversion Rate as increased to reflect the Additional
Shares pursuant to the table below; provided, however, that if, at the effective time of a Make-Whole Fundamental Change described in clause (b) of the definition of Fundamental Change, the Reference Property following such
Make-Whole Fundamental Change is composed entirely of cash, for any conversion of Notes following the Effective Date of such Make-Whole Fundamental Change, the Conversion Obligation shall be calculated based solely on the Stock Price for the
transaction and shall be deemed to be an amount of cash per $1,000 principal amount of converted Notes equal to the Conversion Rate (including any adjustment for Additional Shares), multiplied by such Stock Price. In such event, the
Conversion Obligation shall be determined and paid to Holders in cash on the third Business Day following the Conversion Date. The Company shall notify the Holders of Notes, the Trustee and the Conversion Agent (if other than the Trustee) of the
Effective Date of any Make-Whole Fundamental Change and issue a press release announcing such Effective Date or publish a notice of such Effective Date on the Company’s website or through such other public medium as the Company may use at that
time no later than five Business Days after such Effective Date. 

  
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 (c) The number of Additional Shares, if any, by which the Conversion Rate shall be increased
shall be determined by reference to the table below, based on the date on which the Make-Whole Fundamental Change occurs or becomes effective (the “Effective Date”) and the price (the “Stock Price”) paid (or deemed
to be paid) per share of the Common Stock in the Make-Whole Fundamental Change. If the holders of the Common Stock receive in exchange for their Common Stock only cash in a Make-Whole Fundamental Change described in clause (b) of the definition
of Fundamental Change, the Stock Price shall be the cash amount paid per share. Otherwise, the Stock Price shall be the average of the Last Reported Sale Prices of the Common Stock over the five Trading Day period ending on, and including, the
Trading Day immediately preceding the Effective Date of the Make-Whole Fundamental Change. The Board of Directors shall make appropriate adjustments to the Stock Price, in its good faith determination, to account for any adjustment to the Conversion
Rate that becomes effective, or any event requiring an adjustment to the Conversion Rate where the Ex-Dividend Date, Effective Date (as such term is used in Section 13.04) or expiration date of the event occurs, during such five consecutive
Trading Day period. 
 (d) The Stock Prices set forth in the column headings of the table below shall be adjusted as of any date on which
the Conversion Rate of the Notes is otherwise 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
immediately prior to such adjustment giving rise to the Stock Price adjustment and the denominator of which is the Conversion Rate as so adjusted. The number of Additional Shares set forth in the table below shall be adjusted in the same manner and
at the same time as the Conversion Rate as set forth in Section 13.04. 
 (e) The following table sets forth the number of Additional
Shares of Common Stock by which the Conversion Rate shall be increased per $1,000 principal amount of Notes pursuant to this Section 13.03 for each Stock Price and Effective Date set forth below: 

 

																																																					
	 	 	Stock Price	 
	 Effective Date
	 	$52.64	 	 	$60.00	 	 	$65.00	 	 	$70.00	 	 	$77.64	 	 	$85.00	 	 	$95.00	 	 	$105.00	 	 	$125.00	 	 	$150.00	 	 	$175.00	 	 	$200.00	 	 	$235.00	 
	 September 17, 2014
	 	 	6.1176	  	 	 	4.7940	  	 	 	4.1020	  	 	 	3.5305	  	 	 	2.8325	  	 	 	2.3097	  	 	 	1.7659	  	 	 	1.3588	  	 	 	0.8089	  	 	 	0.4140	  	 	 	0.1961	  	 	 	0.0766	  	 	 	0.0000	  
	 September 15, 2015
	 	 	6.1176	  	 	 	4.6311	  	 	 	3.9386	  	 	 	3.3690	  	 	 	2.6769	  	 	 	2.1616	  	 	 	1.6301	  	 	 	1.2361	  	 	 	0.7112	  	 	 	0.3441	  	 	 	0.1488	  	 	 	0.0475	  	 	 	0.0000	  
	 September 15, 2016
	 	 	6.1176	  	 	 	4.5091	  	 	 	3.8071	  	 	 	3.2319	  	 	 	2.5379	  	 	 	2.0253	  	 	 	1.5012	  	 	 	1.1171	  	 	 	0.6149	  	 	 	0.2747	  	 	 	0.1023	  	 	 	0.0202	  	 	 	0.0000	  
	 September 15, 2017
	 	 	6.1176	  	 	 	4.4402	  	 	 	3.7161	  	 	 	3.1263	  	 	 	2.4194	  	 	 	1.9023	  	 	 	1.3801	  	 	 	1.0032	  	 	 	0.5218	  	 	 	0.2090	  	 	 	0.0608	  	 	 	0.0003	  	 	 	0.0000	  
	 September 15, 2018
	 	 	6.1176	  	 	 	4.3900	  	 	 	3.6310	  	 	 	3.0175	  	 	 	2.2893	  	 	 	1.7640	  	 	 	1.2423	  	 	 	0.8737	  	 	 	0.4190	  	 	 	0.1417	  	 	 	0.0240	  	 	 	0.0000	  	 	 	0.0000	  
	 September 15, 2019
	 	 	6.1176	  	 	 	4.2954	  	 	 	3.4868	  	 	 	2.8399	  	 	 	2.0849	  	 	 	1.5521	  	 	 	1.0385	  	 	 	0.3694	  	 	 	0.2851	  	 	 	0.0669	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  
	 September 15, 2020
	 	 	6.1176	  	 	 	4.0719	  	 	 	3.1782	  	 	 	2.4774	  	 	 	1.6861	  	 	 	1.1555	  	 	 	0.6791	  	 	 	0.3858	  	 	 	0.0989	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  
	 September 15, 2021
	 	 	6.1176	  	 	 	3.7874	  	 	 	2.5053	  	 	 	1.4064	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  	 	 	0.0000	  

 The exact Stock Prices and Effective Dates may not be set forth in the table above, in which case: 

(i) if the Stock Price is between two Stock Prices in the table above or the Effective Date is between two Effective Dates in
the table above, the number of Additional Shares by which the Conversion Rate shall be increased shall be determined by a straight-line interpolation between the number of Additional Shares set forth for the higher and lower Stock Prices and the
earlier and later Effective Dates, as applicable, based on a 365-day year; 

  
 61 

 (ii) if the Stock Price is greater than $235.00 per share (subject to adjustment
in the same manner as the Stock Prices set forth in the column headings of the table above pursuant to subsection (d) above), no Additional Shares shall be added to the Conversion Rate; and 

(iii) if the Stock Price is less than $52.64 per share (subject to adjustment in the same manner as the Stock Prices set forth
in the column headings of the table above pursuant to subsection (d) above), no Additional Shares shall be added to the Conversion Rate. 

Notwithstanding the foregoing, in no event shall the Conversion Rate per $1,000 principal amount of Notes exceed 18.9969 shares of Common Stock, subject to
adjustment in the same manner as the Conversion Rate pursuant to Section 13.04. 
 (f) Nothing in this Section 13.03 shall prevent
an adjustment to the Conversion Rate pursuant to Section 13.04 in respect of a Make-Whole Fundamental Change. 
 Section 13.04.
Adjustment of Conversion Rate. The Conversion Rate shall be adjusted from time to time by the Company if any of the following events occurs, except that the Company shall not make any adjustments to the Conversion Rate if Holders of the Notes
participate (other than in the case of a share split or share combination), at the same time and upon the same terms as holders of the Common Stock and solely as a result of holding the Notes, in any of the transactions described in this
Section 13.04, without having to convert their Notes, as if they held a number of shares of Common Stock equal to the Conversion Rate, multiplied by the principal amount (expressed in thousands) of Notes held by such Holder. 

(a) If the Company exclusively issues shares of Common Stock as a dividend or distribution on shares of the Common Stock, or if the Company
effects a share split or share combination, the Conversion Rate shall be adjusted based on the following formula: 
  

 
 

 
 where, 
  

					
	CR0	  	=	  	the Conversion Rate in effect immediately prior to the open of business on the Ex-Dividend Date of such dividend or distribution, or immediately prior to the open of business on the Effective Date of such share split or share
combination, as applicable;
			
	CR’	  	=	  	the Conversion Rate in effect immediately after the open of business on such Ex-Dividend Date or Effective Date, as the case may be;
			
	OS0	  	=	  	the number of shares of Common Stock outstanding immediately prior to the open of business on such Ex-Dividend Date or Effective Date, as the case may be; and

  
 62 

					
			
	OS1	  	=	  	the number of shares of Common Stock outstanding immediately after giving effect to such dividend, distribution, share split or share combination, as the case may be.

 Any adjustment made under this Section 13.04(a) shall become effective immediately after the open of business on the
Ex-Dividend Date for such dividend or distribution, or immediately after the open of business on the Effective Date for such share split or share combination, as applicable. If any dividend or distribution of the type described in this
Section 13.04(a) is declared but not so paid or made, or any share split or combination of the type described in this Section 13.04(a) is announced but the outstanding shares of Common Stock are not split 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 not to split 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 or distribution had not been declared or such share split or combination had not been announced. 

(b) If the Company issues to all or substantially all holders of the Common Stock any rights, options or warrants entitling them, for a period
of not more than 45 calendar days after the declaration date for such issuance, to subscribe for or purchase shares of the Common Stock at a price per share that is less than the average of the Last Reported Sale Prices of the Common Stock for the
10 consecutive Trading Day period ending on, and including, the Trading Day immediately preceding the declaration date for such issuance, the Conversion Rate shall be increased based on the following formula: 

 
  
 

 
 where, 
  

					
	CR0	  	=	  	the Conversion Rate in effect immediately prior to the open of business on the Ex-Dividend Date for such issuance;
			
	CR’	  	=	  	the Conversion Rate in effect immediately after the open of business on such Ex-Dividend Date;
			
	OS0	  	=	  	the number of shares of Common Stock outstanding immediately prior to the open of business on such Ex-Dividend Date;
			
	X	  	=	  	the total number of shares of Common Stock issuable pursuant to such rights, options or warrants; and
			
	Y	  	=	  	the number of shares of Common Stock equal to the aggregate price payable to exercise such rights, options or warrants, divided by the average of the Last Reported Sale Prices of the Common Stock over the 10 consecutive
Trading Day period ending on, and including, the Trading Day immediately preceding the declaration date for the issuance of such rights, options or warrants.

  
 63 

 Any increase made under this Section 13.04(b) shall be made successively whenever any such rights, options
or warrants are issued and shall become effective immediately after the open of business on the Ex-Dividend Date for such issuance. To the extent that shares of the Common Stock are not delivered after the expiration of such rights, options or
warrants, the Conversion Rate shall be decreased to the Conversion Rate that would then be in effect had the increase with respect to the issuance of such rights, options or warrants been made on the basis of delivery of only the number of shares of
Common Stock actually delivered. If such rights, options or warrants are not so issued, the Conversion Rate shall be decreased to the Conversion Rate that would then be in effect if such Ex-Dividend Date for such issuance had not occurred. 

For purposes of this Section 13.04(b) and Section 13.01(b)(ii)(A), in determining whether any rights, options or warrants entitle
the holders to subscribe for or purchase shares of the Common Stock at less than such average of the Last Reported Sale Prices of the Common Stock for the 10 consecutive Trading Day period ending on, and including, the Trading Day immediately
preceding the date of announcement for such issuance, and in determining the aggregate offering price of such shares of Common Stock, there shall be taken into account any consideration received by the Company for such rights, options or warrants
and any amount payable on exercise or conversion thereof, the value of such consideration, if other than cash, to be determined by the Board of Directors. 

(c) If the Company distributes shares of its Capital Stock, evidences of its indebtedness, other assets or property of the Company or rights,
options or warrants to acquire its Capital Stock or other securities of the Company, to all or substantially all holders of the Common Stock, excluding (i) dividends, distributions or issuances as to which an adjustment was effected pursuant to
Section 13.04(a) or Section 13.04(b), (ii) dividends or distributions paid exclusively in cash as to which an adjustment was effected pursuant to Section 13.04(d), (iii) distributions of Reference Property in a transaction
described in Section 13.07, (iv) rights issued pursuant to a stockholder rights plan of the Company (other than pursuant to Section 13.11) and (v) Spin-Offs as to which the provisions set forth below in this Section 13.04(c)
shall apply (any of such shares of Capital Stock, evidences of indebtedness, other assets or property or rights, options or warrants to acquire Capital Stock or other securities, the “Distributed Property”), then the Conversion Rate
shall be increased based on the following formula: 
  
  

 
 where, 
  

					
	CR0	  	=	  	the Conversion Rate in effect immediately prior to the open of business on the Ex-Dividend Date for such distribution;
			
	CR’	  	=	  	the Conversion Rate in effect immediately after the open of business on such Ex-Dividend Date;
			
	SP0	  	=	  	the average of the Last Reported Sale Prices of the Common Stock over the 10 consecutive Trading Day period ending on, and including, the Trading Day immediately preceding the Ex-Dividend Date for such distribution; and

  
 64 

					
			
	FMV	  	=	  	the fair market value (as determined by the Board of Directors) of the Distributed Property with respect to each outstanding share of the Common Stock as of the open of business on the Ex-Dividend Date for such
distribution.

 Any increase made under the portion of this Section 13.04(c) above shall become effective immediately
after the open of business on the Ex-Dividend Date for such distribution. If such distribution is not so paid or made, the Conversion Rate shall be decreased to the Conversion Rate that would then be in effect if such distribution had not been
declared. Notwithstanding the foregoing, if “FMV” (as defined above) is equal to or greater than “SP0” (as defined above), in lieu of the foregoing increase, each Holder of
a Note shall receive (without having to convert its Notes), in respect of each $1,000 principal amount thereof, at the same time and upon the same terms as holders of the Common Stock receive the Distributed Property, the amount and kind of
Distributed Property such Holder would have received if such Holder owned a number of shares of Common Stock equal to the Conversion Rate in effect on the Ex-Dividend Date for the distribution. If the Board of Directors determines the
“FMV” (as defined above) of any distribution for purposes of this Section 13.04(c) by reference to the actual or when-issued trading market for any securities, it shall in doing so consider the prices in such market over the same
period used in computing the Last Reported Sale Prices of the Common Stock over the 10 consecutive Trading Day period ending on, and including, the Trading Day immediately preceding the Ex-Dividend Date for such distribution. 

With respect to an adjustment pursuant to this Section 13.04(c) where there has been an Ex-Dividend Date for a dividend or other
distribution on the Common Stock of 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, or, when issued, will be, listed or admitted for trading
on a U.S. national securities exchange (a “Spin-Off”), the Conversion Rate shall be increased based on the following formula: 
  

 
 

 
 where, 
  

					
	CR0	  	=	  	the Conversion Rate in effect immediately prior to the end of the Valuation Period;
			
	CR’	  	=	  	the Conversion Rate in effect immediately after the end of the Valuation Period;
			
	FMV0	  	=	  	the average of the Last Reported Sale Prices of the Capital Stock or similar equity interest distributed to holders of the Common Stock applicable to one share of the Common Stock (determined by reference to the definition of Last
Reported Sale Price as set forth in Section 1.01 as if references therein to Common Stock were to such Capital Stock or similar equity interest) over the first 10 consecutive Trading Day period after, and including, the Ex-Dividend Date of the
Spin-Off (the “Valuation Period”); and
			
	MP0	  	=	  	the average of the Last Reported Sale Prices of the Common Stock over the Valuation Period.

  
 65 

 The increase in the Conversion Rate under the preceding paragraph shall occur on the last Trading Day of the
Valuation Period; provided that in respect of any conversion of Notes during the Valuation Period, references in the portion of this Section 13.04(c) related to Spin-Offs with respect to 10 Trading Days shall be deemed to be replaced
with such lesser number of Trading Days as have elapsed between the Ex-Dividend Date of such Spin-Off and the Conversion Date in determining the Conversion Rate. If the Ex-Dividend Date of the Spin-Off is after the 10th Trading Day immediately
preceding, and including, the end of any Observation Period in respect of a conversion of Notes, references in this Section 13.04(c) related to Spin-Offs to 10 Trading Days will be deemed to be replaced, solely in respect of that conversion of
Notes, with such lesser number of Trading Days as have elapsed from, and including, the Ex-Dividend Date for the Spin-Off to, and including, the last Trading Day of such Observation Period. If such Spin-Off does not occur, the Conversion Rate shall
be decreased to the Conversion Rate that would then be in effect if such Ex-Dividend Date for such Spin-Off had not occurred, effective as of the date on which the Board of Directors determines not to consummate such Spin-Off. 

For purposes of this Section 13.04(c) (and subject in all respect to Section 13.11), rights, options or warrants distributed by the
Company to all holders of the Common Stock entitling them to subscribe for or purchase shares of the Company’s Capital Stock, including Common Stock (either initially or under certain circumstances), which rights, options or warrants, until the
occurrence of a specified event or events (“Trigger Event”): (i) are deemed to be transferred with such shares of the Common Stock; (ii) are not exercisable; and (iii) are also issued in respect of future issuances of
the Common Stock, shall be deemed not to have been distributed for purposes of this Section 13.04(c) (and no adjustment to the Conversion Rate under this Section 13.04(c) will be required) until the occurrence of the earliest Trigger
Event, whereupon such rights, options or 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 13.04(c). If any such rights, options or
warrants, including any such existing rights, options or warrants distributed prior to the date of this Indenture, are subject to events, upon the occurrence of which such rights, options 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 Ex-Dividend Date with respect to new rights, options or warrants with such rights
(in which case the existing rights, options or warrants shall be deemed to terminate and expire on such date without exercise by any of the holders thereof). In addition, in the event of any distribution (or deemed distribution) of rights, options
or warrants, or any Trigger Event or other event (of the type described in the immediately 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 13.04(c) was made, (1) in the case of any such rights, options or warrants that shall all have been redeemed or purchased without exercise by any holders thereof, upon such final redemption or purchase (x) the
Conversion Rate shall be readjusted as if such rights, options or warrants had not been issued and (y) the Conversion Rate shall then again be readjusted to give effect to such distribution, deemed distribution or Trigger Event, as the case may
be, as though it were a cash distribution, equal to the per share redemption or purchase price received by a holder or holders of Common Stock with respect to such rights, options or warrants (assuming such holder had retained such rights, options
or warrants), made to all holders of Common Stock as of the date of such redemption or purchase, and (2) in the case of such rights, options 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, options and warrants had not been issued. 

  
 66 

 For purposes of Section 13.04(a), Section 13.04(b) and this Section 13.04(c), and
subject to Section 13.05, if any dividend or distribution to which this Section 13.04(c) is applicable also includes one or both of: 

(A) a dividend or distribution of shares of Common Stock to which Section 13.04(a) is applicable (the “Clause A
Distribution”); or 
 (B) a dividend or distribution of rights, options or warrants to which Section 13.04(b) is applicable
(the “Clause B Distribution”), 
 then, in either case, (1) such dividend or distribution, other than the Clause A Distribution and
the Clause B Distribution, shall be deemed to be a dividend or distribution to which this Section 13.04(c) is applicable (the “Clause C Distribution”) and any Conversion Rate adjustment required by this Section 13.04(c)
with respect to such Clause C Distribution shall then be made, and (2) the Clause A Distribution and Clause B Distribution shall be deemed to immediately follow the Clause C Distribution and any Conversion Rate adjustment required by
Section 13.04(a) and Section 13.04(b) with respect thereto shall then be made, except that, if determined by the Company (I) the “Ex-Dividend Date” of the Clause A Distribution and the Clause B Distribution shall be deemed
to be the Ex-Dividend Date of the Clause C Distribution and (II) any shares of Common Stock included in the Clause A Distribution or Clause B Distribution shall be deemed not to be “outstanding immediately prior to the open of business on such
Ex-Dividend Date or Effective Date” within the meaning of Section 13.04(a) or “outstanding immediately prior to the open of business on such Ex-Dividend Date” within the meaning of Section 13.04(b). 

(d) If any cash dividend or distribution is made to all or substantially all holders of the Common Stock, the Conversion Rate shall be
adjusted based on the following formula: 
  
  
 

 
 where, 
  

					
	CR0	  	=	  	the Conversion Rate in effect immediately prior to the open of business on the Ex-Dividend Date for such dividend or distribution;
			
	CR’	  	=	  	the Conversion Rate in effect immediately after the open of business on the Ex-Dividend Date for such dividend or distribution;
			
	SP0	  	=	  	the Last Reported Sale Price of the Common Stock on the Trading Day immediately preceding the Ex-Dividend Date for such dividend or distribution; and
			
	C	  	=	  	the amount in cash per share the Company pays or distributes to all or substantially all holders of the Common Stock.

  
 67 

 Any increase pursuant to this Section 13.04(d) shall become effective immediately after the open of business
on the Ex-Dividend Date for such dividend or distribution. If such dividend or distribution is not so paid or made, the Conversion Rate shall be decreased, effective as of the date the Board of Directors determines not to make or pay such dividend
or distribution, to be the Conversion Rate that would then be in effect if such dividend or distribution had not been declared. Notwithstanding the foregoing, if “C” (as defined above) is equal to or greater than “SP0” (as defined above), in lieu of the foregoing increase, each Holder of a Note shall receive (without having to convert its Notes), for each $1,000 principal amount of Notes, at the same time
and upon the same terms as holders of shares of the Common Stock, the amount of cash that such Holder would have received if such Holder owned a number of shares of Common Stock equal to the Conversion Rate on the Ex-Dividend Date for such cash
dividend or distribution. 
 (e) If the Company or any of its Subsidiaries makes a payment in respect of a tender or exchange offer for the
Common Stock, to the extent that the cash and value of any other consideration included in the payment per share of the Common Stock exceeds the average of the Last Reported Sale Prices of the Common Stock over the 10 consecutive Trading Day period
commencing on, and including, the Trading Day next succeeding the last date on which tenders or exchanges may be made pursuant to such tender or exchange offer, the Conversion Rate shall be increased based on the following formula: 

 
  
 

 
 where, 
  

					
	CR0	  	=	  	the Conversion Rate in effect immediately prior to the close of business on the 10th Trading Day immediately following, and including, the Trading Day next succeeding the date such tender or exchange offer expires;
			
	CR’	  	=	  	the Conversion Rate in effect immediately after the close of business on the 10th Trading Day immediately following, and including, the Trading Day next succeeding the date such tender or exchange offer expires;
			
	AC	  	=	  	the aggregate value of all cash and any other consideration (as determined by the Board of Directors) paid or payable for shares of Common Stock purchased in such tender or exchange offer;
			
	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 the purchase of all shares of Common Stock accepted for purchase or exchange in such
tender or exchange offer);
			
	OS’	  	=	  	the number of shares of Common Stock outstanding immediately after the date such tender or exchange offer expires (after giving effect to the purchase of all shares of Common Stock accepted for purchase or exchange in such tender or
exchange offer); and

  
 68 

					
			
	SP’	  	=	  	the average of the Last Reported Sale Prices of the Common Stock over the 10 consecutive Trading Day period commencing on, and including, the Trading Day next succeeding the date such tender or exchange offer expires.

 The adjustment to the Conversion Rate under this Section 13.04(e) shall occur at the close of business on the 10th
Trading Day immediately following, and including, the Trading Day next succeeding the date such tender or exchange offer expires; provided that in respect of any conversion of Notes within the 10 Trading Days immediately following, and
including, the Trading Day next succeeding the date such tender or exchange offer expires, references in this Section 13.04(e) with respect to 10 Trading Days shall be deemed replaced with such lesser number of Trading Days as have elapsed
between the date that such tender or exchange offer expires and the Conversion Date in determining the Conversion Rate. In addition, if the Trading Day next succeeding the date such tender or exchange offer expires is after the 10th Trading Day
immediately preceding, and including, the end of any Observation Period in respect of a conversion of Notes, references in this Section 13.04(e) to 10 Trading Days shall be deemed to be replaced, solely in respect of that conversion of Notes,
with such lesser number of Trading Days as have elapsed from, and including, the Trading Day next succeeding the date such tender or exchange offer expires to, and including, the last Trading Day of such Observation Period. If the Company is
obligated to purchase Common Stock pursuant to any such tender offer or exchange offer, but the Company is permanently prevented by applicable law from effecting any such purchases or all such purchases are rescinded, the Conversion Rate shall again
be adjusted to be the Conversion Rate that would then be in effect if such tender offer or exchange offer had not been made or had been made only in respect of the purchases that have been effected. 

(f) Notwithstanding this Section 13.04 or any other provision of this Indenture or the Notes, if a Conversion Rate adjustment becomes
effective on any Ex-Dividend Date, and a Holder that has converted its Notes on or after such Ex-Dividend Date and on or prior to the related Record Date would be treated as the record holder of the shares of Common Stock as of the related
Conversion Date as described under Section 13.02(i) based on an adjusted Conversion Rate for such Ex-Dividend Date, then, notwithstanding the Conversion Rate adjustment provisions in this Section 13.04, the Conversion Rate adjustment
relating to such Ex-Dividend Date shall not be made for such converting Holder. Instead, such Holder shall be treated as if such Holder were the record owner of the shares of Common Stock on an unadjusted basis and participate in the related
dividend, distribution or other event giving rise to such adjustment. 
 (g) Except as stated herein, the Company shall not adjust the
Conversion Rate for the issuance of shares of the Common Stock or any securities convertible into or exchangeable for shares of the Common Stock or the right to purchase shares of the Common Stock or such convertible or exchangeable securities. 

(h) In addition to those adjustments required by clauses (a), (b), (c), (d) and (e) of this Section 13.04, and to the extent
permitted by applicable law and subject to the applicable rules of any exchange on which any of the Company’s securities are then listed, the Company from time to time may increase the Conversion Rate by any amount for a period of at least 20
Business Days if the Board of Directors determines that such increase would be in the Company’s best interest. In addition, to the extent permitted by applicable law and subject to the applicable rules of any exchange on which any of the
Company’s securities are then listed, the Company may 

  
 69 

 
(but is not required to) increase the Conversion Rate to avoid or diminish any income tax to holders of Common Stock or rights to purchase Common Stock in connection with a dividend or
distribution of shares of Common Stock (or rights to acquire shares of Common Stock) or similar event. Whenever the Conversion Rate is increased pursuant to either of the preceding two sentences, the Company shall mail to the Holder of each Note at
its last address appearing on the Note Register a notice of the increase at least 15 days prior to the date the increased Conversion Rate takes effect, and such notice shall state the increased Conversion Rate and the period during which it will be
in effect. 
 (i) Notwithstanding anything to the contrary in this Article 13, the Conversion Rate shall not be adjusted: 

(i) upon the issuance of any shares of Common Stock pursuant to any present or future plan providing for the reinvestment of
dividends or interest payable on the Company’s securities and the investment of additional optional amounts in shares of Common Stock under any plan; 

(ii) upon the issuance of any shares of Common Stock or options or rights to purchase those shares pursuant to any present or
future employee, director or consultant benefit plan or program of or assumed by the Company or any of the Company’s Subsidiaries; 

(iii) upon the issuance of any shares of the Common Stock pursuant to any option, warrant, right or exercisable, exchangeable
or convertible security not described in clause (ii) of this subsection and outstanding as of the date the Notes were first issued; 

(iv) upon the repurchase of shares of Common Stock pursuant to an open-market share repurchase program or other buy-back
transaction that is not a tender offer or exchange offer of the nature described in Section 13.04(e), including through any structured or derivative transaction such as accelerated share repurchase derivative or similar forward derivative; 

(v) solely for a change in the par value of the Common Stock; or 

(vi) for accrued and unpaid interest, if any. 

(j) Notwithstanding anything to the contrary in this Indenture, the Company shall not be required to make an adjustment pursuant to clauses
(a), (b), (c), (d) or (e) of this Section 13.04 unless such adjustment would result in a change of at least 1% of the Conversion Rate. However, the Company shall carry forward any adjustments that are less than 1% of the Conversion
Rate and make such carried forward adjustments with respect to the Notes (1) when the cumulative net effect of all adjustments not yet made will result in a change of 1% to the Conversion Rate and (2) regardless of whether the adjustment
(or such cumulative net effect) is less than 1% of the Conversion Rate (i) (x) on the Conversion Date for any Notes (in the case of Physical Settlement) and (y) on each Trading Day of any Observation Period (in the case of Cash
Settlement or Combination Settlement); (ii) annually on each September 17 prior to the Maturity Date; and (iii) on the effective date of any Fundamental Change or Make-Whole Fundamental Change. All calculations and other
determinations under this Article 13 shall be made by the Company and shall be made to the nearest one-ten thousandth (1/10,000) of a share. 

  
 70 

 (k) Whenever the Conversion Rate is adjusted as herein provided, the Company shall promptly file
with the Trustee (and the Conversion Agent if not the Trustee) an Officer’s Certificate setting forth the Conversion Rate after such adjustment and setting forth a brief statement of the facts requiring such adjustment. Unless and until a
Responsible Officer of the Trustee shall have received such Officer’s 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 mail such notice of such adjustment of the Conversion Rate to each Holder at its last address appearing on the Note Register of this Indenture. Failure to deliver such notice shall not affect the legality or validity of any such
adjustment. 
 (l) For purposes of this Section 13.04, the number of shares of Common Stock at any time outstanding shall not include
shares of Common Stock held in the treasury of the Company so long as the Company does not pay any dividend or make any distribution on shares of Common Stock held in the treasury of the Company, but shall include shares of Common Stock issuable in
respect of scrip certificates issued in lieu of fractions of shares of Common Stock. 
 Section 13.05. Adjustments of Prices.
Whenever any provision of this Indenture requires the Company to calculate the Last Reported Sale Prices, the Trading Prices, the Daily VWAPs, the Daily Conversion Values or the Daily Settlement Amounts over a span of multiple days (including an
Observation Period and, if applicable, the period for determining the Stock Price for purposes of a Make-Whole Fundamental Change), the Board of Directors shall make appropriate adjustments to each to account for any adjustment to the Conversion
Rate that becomes effective, or any event requiring an adjustment to the Conversion Rate where the Ex-Dividend Date, Effective Date or expiration date of the event occurs, at any time during the period when the Last Reported Sale Prices, the Trading
Prices, the Daily VWAPs, the Daily Conversion Values or the Daily Settlement Amounts are to be calculated. 
 Section 13.06. Shares
to Be Fully Paid. The Company shall provide, free from preemptive rights, out of its authorized but unissued shares or shares held in treasury, sufficient shares of Common Stock to provide for conversion of the Notes from time to time as such
Notes are presented for conversion (assuming that at the time of computation of such number of shares, all such Notes would be converted by a single Holder and that Physical Settlement is applicable). 

Section 13.07. Effect of Recapitalizations, Reclassifications and Changes of the Common Stock.  

(a) In the case of: 

(i) any recapitalization, reclassification or change of the Common Stock (other than changes resulting from a subdivision or
combination), 

  
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 (ii) any consolidation, merger or combination involving the Company, 

(iii) any sale, lease or other transfer to a third party of the consolidated assets of the Company and the Company’s
Subsidiaries substantially as an entirety or 
 (iv) any statutory share exchange, 

in each case, as a result of which holders of the Common Stock would be entitled to receive stock, other securities, other property or assets (including cash
or any combination thereof) (any such event, a “Merger Event”), then, at and after the effective time of such Merger Event, the right to convert each $1,000 principal amount of Notes shall be changed into a right to convert such
principal amount of Notes into the kind and amount of shares of stock, other securities or other property or assets (including cash or any combination thereof) that a holder of a number of shares of Common Stock equal to the Conversion Rate
immediately prior to such Merger Event would have owned or been entitled to receive (the “Reference Property”, with each “unit of Reference Property” meaning the kind and amount of Reference Property that a holder
of one share of Common Stock is entitled to receive) upon such Merger Event and, prior to or at the effective time 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 permitted under Section 10.01(f) providing for such change in the right to convert each $1,000 principal amount of Notes; provided, however, that at and after the effective time of the Merger Event
(A) the Company shall continue to have the right to determine the form of consideration to be paid or delivered, as the case may be, upon conversion of Notes in accordance with Section 13.02 and (B) (I) any amount payable in cash
upon conversion of the Notes in accordance with Section 13.02 shall continue to be payable in cash, (II) any shares of Common Stock that the Company would have been required to deliver upon conversion of the Notes in accordance with
Section 13.02 shall instead be deliverable in the amount and type of Reference Property that a holder of that number of shares of Common Stock would have received in such Merger Event and (III) the Daily VWAP shall be calculated based on the
value of a unit of Reference Property. 
 If the Merger Event causes the Common Stock to be converted into, or exchanged for, the right to
receive more than a single type of consideration (determined based in part upon any form of stockholder election), then (i) the Reference Property into which the Notes will be convertible shall be deemed to be (x) the weighted average of
the types and amounts of consideration received by the holders of Common Stock that affirmatively make such an election or (y) if no holders of Common Stock affirmatively make such an election, the types and amounts of consideration actually
received by the holders of Common Stock, and (ii) the unit of Reference Property for purposes of the immediately preceding paragraph shall refer to the consideration referred to in clause (i) attributable to one share of Common Stock. If
the holders of Common Stock receive only cash in such Merger Event, then for all conversions for which the relevant Conversion Date occurs after the effective date of such Merger Event (A) the consideration due upon conversion of each $1,000
principal amount of Notes shall be solely cash in an amount equal to the Conversion Rate in effect on the Conversion Date (as may be increased by any Additional Shares pursuant to Section 13.03), multiplied by the price paid per share of
Common Stock in such Merger Event and (B) the Company shall satisfy the Conversion Obligation by paying cash to converting Holders on the third Business Day immediately following the relevant Conversion Date. The Company shall notify Holders,
the Trustee and the Conversion Agent (if other than the Trustee) in writing of such weighted average as soon as practicable after such determination is made. 

  
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 Such supplemental indenture described in the second immediately preceding paragraph shall provide
for anti-dilution and other adjustments that shall be as nearly equivalent as is possible to the adjustments provided for in this Article 13. If, in the case of any Merger Event, the Reference Property includes shares of stock, securities or other
property or assets (including cash or any combination thereof) of a Person other than the successor or purchasing corporation, as the case may be, in such Merger Event, then such supplemental indenture shall also be executed by such other Person and
shall contain such additional provisions to protect the interests of the Holders of the Notes as the Board of Directors shall reasonably consider necessary by reason of the foregoing. 

(b) When the Company executes a supplemental indenture pursuant to subsection (a) of this Section 13.07, the Company shall promptly
file with the Trustee an Officer’s Certificate briefly stating the reasons therefor, the kind or amount of cash, securities or property or asset that will comprise a unit of Reference Property after any such Merger Event, any adjustment to be
made with respect thereto and that all conditions precedent have been complied with. The Company shall cause notice of the execution of such supplemental indenture to be delivered to each Holder, as provided for in this Indenture, within 20 days
after execution thereof. Failure to deliver such notice shall not affect the legality or validity of such supplemental indenture. 
 (c)
None of the foregoing provisions shall affect the right of a holder of Notes to convert its Notes into cash, shares of Common Stock or a combination of cash and shares of Common Stock, as applicable, as set forth in Section 13.01 and
Section 13.02 prior to the effective date of such Merger Event. 
 (d) The above provisions of this Section shall similarly apply to
successive Merger Events. 
 (e) Upon the consummation of any Merger Event, references to “Common Stock” shall be deemed to refer
to any Reference Property that constitutes capital stock after giving effect to such Merger Event. 
 Section 13.08. Certain
Covenants. (a) The Company covenants that all shares of Common Stock issued upon conversion of Notes will be fully paid and non-assessable by the Company and free from all taxes, liens and charges with respect to the issue thereof. 

(b) The Company covenants that, if any shares of Common Stock to be provided for the purpose of conversion of Notes hereunder require
registration with or approval of any governmental authority under any federal or state law before such shares of Common Stock may be validly issued upon conversion, the Company will, to the extent then permitted by the rules and interpretations of
the Commission, secure such registration or approval, as the case may be. 
 (c) The Company further covenants that if at any time the
Common Stock shall be listed on any national securities exchange or automated quotation system the Company will list and keep listed, so long as the Common Stock shall be so listed on such exchange or automated quotation system, any Common Stock
issuable upon conversion of the Notes. 

  
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 Section 13.09. Responsibility of Trustee. The Trustee and any other Conversion Agent
shall not at any time be under any duty or responsibility to any Holder to determine the Conversion Rate (or any adjustment thereto) or whether any facts exist that may require any adjustment (including any increase) of the Conversion Rate, or with
respect to the nature or extent or calculation of any such adjustment when made, or with respect to the method employed, or herein or in any supplemental indenture provided to be employed, in making the same. The Trustee and any other Conversion
Agent shall not be accountable with respect to the validity or value (or the kind or amount) of any shares of Common Stock, or of any securities, property or cash that may at any time be issued or delivered upon the conversion of any Note; and the
Trustee and any other Conversion Agent make no representations with respect thereto. Neither the Trustee nor any Conversion Agent shall be responsible for any failure of the Company to issue, transfer or deliver any shares of Common Stock or stock
certificates or other securities or property or cash upon the surrender of any Note for the purpose of conversion or to comply with any of the duties, responsibilities or covenants of the Company contained in this Article. Without limiting the
generality of the foregoing, neither the Trustee nor any Conversion Agent shall be under any responsibility to determine the correctness of any provisions contained in any supplemental indenture entered into pursuant to Section 13.07 relating
either to the kind or amount of shares of stock or securities or property (including cash) receivable by Holders upon the conversion of their Notes after any event referred to in such Section 13.07 or to any adjustment to be made with respect
thereto, but, subject to the provisions of Section 7.01, may accept (without any independent investigation) as conclusive evidence of the correctness of any such provisions, and shall be protected in conclusively relying upon, the
Officer’s Certificate and Opinion of Counsel (which the Company shall be obligated to file with the Trustee prior to the execution of any such supplemental indenture) with respect thereto. Neither the Trustee nor the Conversion Agent shall be
responsible for determining whether any event contemplated by Section 13.01(b) has occurred that makes the Notes eligible for conversion or no longer eligible therefor until the Company has delivered to the Trustee and the Conversion Agent the
notices referred to in Section 13.01(b) with respect to the commencement or termination of such conversion rights, on which notices the Trustee and the Conversion Agent may conclusively rely, and the Company agrees to deliver such notices to
the Trustee and the Conversion Agent immediately after the occurrence of any such event or at such other times as shall be provided for in Section 13.01(b). 

Section 13.10. Notice to Holders Prior to Certain Actions. In case of any: 

(a) action by the Company or one of its Subsidiaries that would require an adjustment in the Conversion Rate pursuant to Section 13.04 or
Section 13.11; 
 (b) Merger Event; or 

(c) voluntary or involuntary dissolution, liquidation or winding-up of the Company or any of its Subsidiaries; 

  
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 then, in each case (unless notice of such event is otherwise required pursuant to another provision of this
Indenture), the Company shall cause to be filed with the Trustee and the Conversion Agent (if other than the Trustee) and to be delivered to each Holder as provided in this Indenture, as promptly as possible but in any event at least 10 days prior
to the applicable date hereinafter specified, a notice stating (i) the date on which a record is to be taken for the purpose of such action by the Company or one of its Subsidiaries or, if a record is not to be taken, the date as of which the
holders of Common Stock of record are to be determined for the purposes of such action by the Company or one of its Subsidiaries, or (ii) the date on which such Merger Event, 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 exchange their Common Stock for securities or other property deliverable upon such Merger Event, dissolution, liquidation or
winding-up. Failure to give such notice, or any defect therein, shall not affect the legality or validity of such action by the Company or one of its Subsidiaries, Merger Event, dissolution, liquidation or winding-up. For the avoidance of doubt, no
failure to comply with this Section 13.10 shall be an Event of Default unless the 60-day period provided for in Section 6.01(f) has run and such Event of Default shall not have been cured prior to the expiration of such 60-day period. 

Section 13.11. Stockholder Rights Plans. To the extent the Company has a stockholder rights plan in effect upon conversion of the
Notes, each share of Common Stock, if any, issued upon such conversion shall be entitled to receive the appropriate number of rights, if any, and the certificates representing the Common Stock issued upon such conversion shall bear such legends, if
any, in each case as may be provided by the terms of any such stockholder rights plan, as the same may be amended from time to time. However, if, prior to any conversion of Notes, the rights have separated from the shares of Common Stock in
accordance with the provisions of the applicable stockholder rights plan so that the Holders would not be entitled to receive any rights in respect of Common Stock, if any, issuable upon conversion of the Notes, the Conversion Rate shall be adjusted
at the time of separation as if the Company distributed to all or substantially all holders of the Common Stock Distributed Property as provided in Section 13.04(c), subject to readjustment in the event of the expiration, termination or
redemption of such rights. 
 Section 13.12. Limit on Issuance of Shares of Common Stock Upon Conversion. Notwithstanding
anything to the contrary in this Indenture, if an event occurs that would result in an increase in the Conversion Rate by an amount in excess of limitations imposed by The New York Stock Exchange, the Company will, at its option, either obtain
stockholder approval of any issuance of Common Stock upon conversion of the Notes in excess of such limitations or pay cash in lieu of delivering any shares of Common Stock otherwise deliverable upon conversions in excess of such limitations based
on the Daily VWAP for each Trading Day of the relevant Observation Period in respect of which, in lieu of delivering shares of Common Stock, the Company pays cash pursuant to this Section 13.12. 

Section 13.13. Exchange in Lieu of Conversion. (a) When a Holder surrenders its Notes for conversion, the Company may, at its
election, direct the Conversion Agent to surrender, on or prior to the second Business Day following the relevant Conversion Date, such Notes to a financial institution designated by the Company (the “Designated Institution”) for
exchange in lieu of conversion. In order to accept any Notes surrendered for conversion for exchange in lieu of conversion, the Designated Institution must agree to timely deliver, in exchange for such

  
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Notes, the cash, shares of Common Stock or combination of cash and shares of Common Stock, at the Company’s election, that would otherwise be due upon conversion as described in Section
13.02 above and in respect of which the Company has notified converting Holders. If the Company makes the election described above, the Company shall, by the close of business on the second Business Day following the relevant Conversion Date, notify
the Holder surrendering Notes for conversion that it has made such election. In addition, the Company shall concurrently notify the Designated Institution of the relevant deadline for delivery of the consideration due upon conversion. Any
Notes exchanged by the Designated Institution will remain outstanding. 
 (b) If the Designated Institution agrees to accept any Notes for
exchange but does not timely deliver the related consideration due upon conversion to the Conversion Agent, or if the Designated Institution does not accept such Notes for exchange, the Company shall, within the time period specified in Section
13.02(c), convert such Notes into cash, shares of Common Stock or combination of cash and shares of Common Stock, at the Company’s election, in accordance with the provisions of Section 13.02. 

(c) For the avoidance of doubt, in no event will the Company’s designation of a Designated Institution pursuant to this Section 13.13
require the Designated Institution to accept any Notes for exchange. 
 ARTICLE 14 

REPURCHASE OF NOTES AT OPTION OF
HOLDERS 
 Section 14.01. Intentionally Omitted. 

Section 14.02. Repurchase at Option of Holders Upon a Fundamental Change. (a) If a Fundamental Change occurs at any time
prior to the Maturity Date, each Holder shall have the right, at such Holder’s option, to require the Company to repurchase for cash all of such Holder’s Notes, or any portion thereof that is equal to $1,000 or an integral multiple of
$1,000, on the date (the “Fundamental Change Repurchase Date”) specified by the Company that is not less than 20 or more than 35 days following the date of the Fundamental Change Company Notice at a repurchase price equal to 100% of
the principal amount thereof, plus accrued and unpaid interest thereon to, but excluding, the Fundamental Change Repurchase Date (the “Fundamental Change Repurchase Price”), unless the Fundamental Change Repurchase Date falls
after a Regular Record Date but on or prior to the Interest Payment Date to which such Regular Record Date relates, in which case the Company shall instead pay the full amount of accrued and unpaid interest to Holders of record as of such Regular
Record Date, and the Fundamental Change Repurchase Price shall be equal to 100% of the principal amount of Notes to be repurchased pursuant to this Article 14. 

(b) Repurchases of Notes under this Section 14.02 shall be made, at the option of the Holder thereof, upon: 

(i) delivery to the Paying Agent by a Holder of a duly completed notice (the “Fundamental Change Repurchase
Notice”) in the form set forth in Attachment 2 to the Form of Note attached hereto as Exhibit A, if the Notes are Physical Notes, or in 

  
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compliance with the Depositary’s procedures for surrendering interests in Global Notes, if the Notes are Global Notes, in each case on or before the close of business on the Business Day
immediately preceding the Fundamental Change Repurchase Date; and 
 (ii) delivery of the Notes, if the Notes are Physical
Notes, to the Paying Agent at any time after delivery of the Fundamental Change Repurchase Notice (together with all necessary endorsements for transfer) at the Corporate Trust Office of the Paying Agent, or book-entry transfer of the Notes, if the
Notes are Global Notes, in compliance with the procedures of the Depositary, in each case such delivery being a condition to receipt by the Holder of the Fundamental Change Repurchase Price therefor. 

The Fundamental Change Repurchase Notice in respect of any Notes to be repurchased shall state: 

(i) in the case of Physical Notes, the certificate numbers of the Notes to be delivered for repurchase; 

(ii) the portion of the principal amount of Notes to be repurchased, which must be $1,000 or an integral multiple thereof; and

 (iii) that the Notes are to be repurchased by the Company pursuant to the applicable provisions of the Notes and this
Indenture; 
 provided, however, that if the Notes are Global Notes, the Fundamental Change Repurchase Notice must comply with appropriate
Depositary procedures. 
 Notwithstanding anything herein to the contrary, any Holder delivering to the Paying Agent the Fundamental Change
Repurchase Notice contemplated by this Section 14.02 shall have the right to withdraw, in whole or in part, such Fundamental Change Repurchase Notice at any time prior to the close of business on the Business Day immediately preceding the
Fundamental Change Repurchase Date by delivery of a written notice of withdrawal to the Paying Agent in accordance with Section 14.03, in the case of Physical Notes, or through the applicable procedures of the Depositary, in the case of Global
Notes. 
 The Paying Agent shall promptly notify the Company of the receipt by it of any Fundamental Change Repurchase Notice or written
notice of withdrawal thereof. 
 (c) On or before the 20th day after the occurrence of the effective date of a Fundamental Change, the
Company shall provide to all Holders of Notes and the Trustee and the Paying Agent (in the case of a Paying Agent other than the Trustee) a notice (the “Fundamental Change Company Notice”) of the occurrence of the effective date of
a Fundamental Change and of the repurchase right at the option of the Holders arising as a result thereof. In the case of Physical Notes, such notice shall be by first class mail or, in the case of Global Notes, such notice shall be delivered in
accordance with the applicable procedures of the Depositary. Simultaneously with providing such notice, the Company shall publish a notice containing the information set forth in the Fundamental Change Company Notice on the Company’s website or
through such other public medium as the Company may use at that time. Each Fundamental Change Company Notice shall specify: 

(i) the events causing the Fundamental Change; 

  
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 (ii) the date of the Fundamental Change; 

(iii) the last date on which a Holder may exercise the repurchase right pursuant to this Article 14; 

(iv) the Fundamental Change Repurchase Price; 

(v) the Fundamental Change Repurchase Date; 

(vi) the name and address of the Paying Agent and the Conversion Agent, if applicable; 

(vii) if applicable, the Conversion Rate and any adjustments to the Conversion Rate; 

(viii) 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 this Indenture; and 

(ix) 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 Holders’ repurchase rights or affect the
validity of the proceedings for the repurchase of the Notes pursuant to this Section 14.02. 
 At the Company’s request, the
Trustee shall give such notice in the Company’s name and at the Company’s expense; provided, however, that, in all cases, the text of such Fundamental Change Company Notice shall be prepared by the Company and such request is
made by the Company at least five (5) Business Days (or such shorter period as may be agreed to by the Trustee) prior to the date such notice is required to be sent to Holders. 

(d) Notwithstanding the foregoing, no Notes may be repurchased by the Company on any date at the option of the Holders upon a Fundamental
Change if the principal amount of the Notes has been accelerated, and such acceleration has not been rescinded, on or prior to such date (except in the case of an acceleration resulting from a Default by the Company in the payment of the Fundamental
Change Repurchase Price with respect to such Notes). The Paying Agent will promptly return to the respective Holders thereof any Physical Notes held by it during the acceleration of the Notes (except in the case of an acceleration resulting from a
Default by the Company in the payment of the Fundamental Change Repurchase Price with respect to such Notes), or any instructions for book-entry transfer of the Notes in compliance with the procedures of the Depositary shall be deemed to have been
canceled, and, upon such return or cancellation, as the case may be, the Fundamental Change Repurchase Notice with respect thereto shall be deemed to have been withdrawn. 

  
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 Section 14.03. Withdrawal of Fundamental Change Repurchase Notice. (a) A
Fundamental Change Repurchase Notice may be withdrawn (in whole or in part) by means of a written notice of withdrawal delivered to the Paying Agent in accordance with this Section 14.03 at any time prior to the close of business on the
Business Day immediately preceding the Fundamental Change Repurchase Date, specifying: 
 (i) the aggregate principal amount
of the Notes with respect to which such notice of withdrawal is being submitted, which must be $1,000 or an integral multiple thereof, 

(ii) if Physical Notes have been issued, the certificate number of the Note in respect of which such notice of withdrawal is
being submitted, and 
 (iii) the aggregate principal amount, if any, of such Note 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; 
 provided,
however, that if the Notes are Global Notes, the notice must comply with appropriate procedures of the Depositary. 

Section 14.04. Deposit of Fundamental Change Repurchase Price. (a) 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 as provided in Section 4.04) on or prior to 11:00 a.m., New York City time, on the Fundamental Change Repurchase Date an
amount of money sufficient to repurchase all of the Notes to be repurchased at the appropriate 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 Business Day immediately preceding the Fundamental Change Repurchase Date) will be made on the later of (i) the Fundamental Change Repurchase Date
(provided the Holder has satisfied the conditions in Section 14.02) and (ii) 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 Section 14.02 by mailing checks for the amount payable to the Holders of such Notes entitled thereto as they shall appear in the Note Register; provided, however, that payments to the Depositary shall be made by
wire transfer of immediately available funds to the account of the Depositary or its nominee. The Trustee shall, promptly after such payment and upon written demand by the Company, return to the Company any funds in excess of the Fundamental Change
Repurchase Price. 
 (b) If by 11:00 a.m. New York City time, on the Fundamental Change Repurchase Date, the Trustee (or other Paying Agent
appointed by the Company) holds money sufficient to make payment on all the Notes or portions thereof that are to be repurchased on such Fundamental Change Repurchase Date, then, with respect to the Notes that have been properly surrendered for
repurchase and have not been validly withdrawn in accordance with the 

  
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provisions of this Indenture, (i) such Notes will cease to be outstanding, (ii) interest 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) and (iii) all other rights of the Holders of such Notes will terminate (other than (x) the right to receive the Fundamental Change Repurchase Price and (y) if the
Fundamental Change Repurchase Date falls after a Regular Record Date but on or prior to the Interest Payment Date to which such Regular Record Date relates, the right of the Holder of record on such Regular Record Date to receive the related
interest payment). 
 (c) Upon surrender of a Note that is to be repurchased in part pursuant to Section 14.02, the Company shall
execute and the Trustee shall authenticate and deliver to the Holder a new Note in an authorized denomination equal in principal amount to the unrepurchased portion of the Note surrendered. 

Section 14.05. Covenant to Comply with Applicable Laws Upon Repurchase of Notes. In connection with any repurchase offer, the
Company will, if required: 
 (a) comply with the tender offer rules under the Exchange Act; 

(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 in connection with any offer by the Company to repurchase the Notes; 

in each case, so as to permit the rights and obligations under this Article 14 to be exercised in the time and in the manner specified in this Article 14.

 ARTICLE 15 
 NO
OPTIONAL REDEMPTION 
 Section 15.01. No Optional Redemption. The Notes shall not be redeemable by
the Company prior to the Maturity Date, and no sinking fund is provided for the Notes. 
 ARTICLE 16 

MISCELLANEOUS PROVISIONS 

Section 16.01. Provisions Binding on Company’s Successors. All the covenants, stipulations, promises and agreements of the
Company contained in this Indenture shall bind its successors and assigns whether so expressed or not. 
 Section 16.02. Official
Acts by Successor Corporation. Any act or proceeding by any provision of this 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 other entity that shall at the time be the lawful sole successor of the Company. 

  
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 Section 16.03. Addresses for Notices, Etc. Any notice or demand that by any provision
of this Indenture is required or permitted to be given or served by the Trustee or by the Holders on the Company 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 Twitter, Inc., 1335 Market Street, Suite 900, San Francisco, CA 94103, Attention: Treasurer, with a copy to:
General Counsel. Any notice, direction, request or demand hereunder to or upon the Trustee shall be deemed to have been sufficiently given or made upon receipt by the Trustee. 

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 Holder shall be mailed to it by first class mail, postage prepaid, at its address as it appears on the
Note Register and shall be sufficiently given to it if so mailed within the time prescribed; provided that, notwithstanding anything to the contrary herein, notices given to Holders of Global Notes may be given electronically through the
facilities of the Depositary. 
 Failure to mail a notice or communication to a Holder or any defect in it shall not affect its sufficiency
with respect to other Holders. If a notice or communication is mailed in the manner provided above, it is duly given, whether or not the addressee receives it. 

In case by reason of the suspension of regular mail service or by reason of any other cause it shall be impracticable to give such notice to
Holders by mail, then such notification as shall be made with the approval of the Trustee shall constitute a sufficient notification for every purpose hereunder. 

The Trustee agrees to accept instructions or directions pursuant to this Indenture sent by unsecured e-mail, pdf, facsimile transmission or
other similar unsecured electronic methods, provided, however, that the Trustee shall have received an incumbency certificate listing persons designated to give such instructions or directions and containing specimen signatures of such designated
persons, which such incumbency certificate shall be amended and replaced whenever a person is to be added or deleted from the listing. If the Company elects to give the Trustee e-mail or facsimile instructions (or instructions by a similar
electronic method) and the Trustee in its discretion elects to act upon such instructions, the Trustee’s understanding of such instructions shall be deemed controlling. The Trustee shall not be liable for any losses, costs or expenses arising
directly or indirectly from the Trustee’s reliance upon and compliance with such instructions notwithstanding such instructions conflict or are inconsistent with a subsequent written instruction. The Company agrees to assume all risks arising
out of the use of such electronic methods to submit instructions and directions to the Trustee, including without limitation the risk of the Trustee acting on unauthorized instructions, and the risk or interception and misuse by third parties. 

Section 16.04. Governing Law; Jurisdiction. THIS INDENTURE AND EACH NOTE, AND ANY CLAIM, CONTROVERSY OR DISPUTE ARISING UNDER OR
RELATED TO THIS INDENTURE AND EACH NOTE, SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 

  
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 The Company irrevocably consents and agrees, for the benefit of the Holders from time to time of
the Notes and the Trustee, that any legal action, suit or proceeding against it with respect to obligations, liabilities or any other matter arising out of or in connection with this Indenture or the Notes may be brought in the courts of the State
of New York or the courts of the United States located in the Borough of Manhattan, New York City, New York and, until amounts due and to become due in respect of the Notes have been paid, hereby irrevocably consents and submits to the non-exclusive
jurisdiction of each such court in personam, generally and unconditionally with respect to any action, suit or proceeding for itself in respect of its properties, assets and revenues. 

The Company irrevocably and unconditionally waives, to the fullest extent permitted by law, any objection which it may now or hereafter have
to the laying of venue of any of the aforesaid actions, suits or proceedings arising out of or in connection with this Indenture brought in the courts of the State of New York or the courts of the United States located in the Borough of Manhattan,
New York City, New York and hereby further irrevocably and unconditionally waives and agrees not to plead or claim in any such court that any such action, suit or proceeding brought in any such court has been brought in an inconvenient forum. 

Section 16.05. Evidence of Compliance with Conditions Precedent; Certificates and Opinions of Counsel to Trustee. Upon any
application or demand by the Company to the Trustee to take any action under any of the provisions of this Indenture, the Company shall furnish to the Trustee an Officer’s Certificate and Opinion of Counsel stating that such action is permitted
by the terms of this Indenture. 
 Each Officer’s Certificate and Opinion of Counsel provided for, by or on behalf of the Company in
this Indenture and delivered to the Trustee with respect to compliance with this Indenture (other than the Officer’s Certificates provided for in Section 4.08) shall include (a) a statement that the person signing such certificate is
familiar with the requested action and this Indenture; (b) a brief statement as to the nature and scope of the examination or investigation upon which the statement contained in such certificate is based; (c) a statement that, in the
judgment of such person, he or she has made such examination or investigation as is necessary to enable him or her to express an informed judgment as to whether or not such action is permitted by this Indenture; and (d) a statement as to
whether or not, in the judgment of such person, such action is permitted by this Indenture and that all conditions precedent thereto have been complied with. 

Section 16.06. Legal Holidays. In any case where any Interest Payment Date, Fundamental Change Repurchase Date or Maturity Date is
not a Business Day, then any action to be taken on such date need not be taken on such date, but may be taken on the next succeeding Business Day with the same force and effect as if taken on such date, and no interest shall accrue in respect of the
delay. 
 Section 16.07. No Security Interest Created. Nothing in this Indenture or in the Notes, expressed or implied, shall be
construed to constitute a security interest under the Uniform Commercial Code or similar legislation, as now or hereafter enacted and in effect, in any jurisdiction. 

  
 82 

 Section 16.08. Benefits of Indenture. Nothing in this Indenture or in the Notes,
expressed or implied, shall give to any Person, other than the Holders, the parties hereto, any Paying Agent, any Conversion Agent, any authenticating agent, any Note Registrar and their successors hereunder, any benefit or any legal or equitable
right, remedy or claim under this Indenture. 
 Section 16.09. Table of Contents, Headings, Etc. The table of contents and the
titles and headings of the articles and sections of this 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 16.10. Authenticating Agent. The Trustee may appoint an authenticating agent that shall be authorized to act on its behalf
and subject to its direction in the authentication and delivery of Notes in connection with the original issuance thereof and transfers and exchanges of Notes hereunder, including under Section 2.04, Section 2.05, Section 2.06,
Section 2.07, Section 10.04 and Section 14.04 as fully to all intents and purposes as though the authenticating agent had been expressly authorized by this Indenture and those Sections to authenticate and deliver Notes. For all
purposes of this Indenture, the authentication and delivery of Notes by the authenticating agent shall be deemed to be authentication and delivery of such Notes “by the Trustee” and a certificate of authentication executed on behalf of the
Trustee by an authenticating agent shall be deemed to satisfy any requirement hereunder or in the Notes for the Trustee’s certificate of authentication. Such authenticating agent shall at all times be a Person eligible to serve as trustee
hereunder pursuant to Section 7.08. 
 Any corporation or other entity into which any authenticating agent may be merged or converted
or with which it may be consolidated, or any corporation or other entity resulting from any merger, consolidation or conversion to which any authenticating agent shall be a party, or any corporation or other entity succeeding to the corporate trust
business of any authenticating agent, shall be the successor of the authenticating agent hereunder, if such successor corporation or other entity is otherwise eligible under this Section 16.10, without the execution or filing of any paper or
any further act on the part of the parties hereto or the authenticating agent or such successor corporation or other entity. 
 Any
authenticating agent may at any time resign by giving written notice of resignation to the Trustee and to the Company. The Trustee may at any time terminate the agency of any authenticating agent by giving written notice of termination to such
authenticating agent and to the Company. Upon receiving such a notice of resignation or upon such a termination, or in case at any time any authenticating agent shall cease to be eligible under this Section, the Trustee may appoint a successor
authenticating agent (which may be the Trustee), shall give written notice of such appointment to the Company and shall deliver notice of such appointment to all Holders as the names and addresses of such Holders appear on the Note Register. 

The Company agrees to pay to the authenticating agent from time to time reasonable compensation for its services although the Company may
terminate the authenticating agent, if it determines such agent’s fees to be unreasonable. 

  
 83 

 The provisions of Section 7.02, Section 7.03, Section 7.04, Section 8.03 and
this Section 16.10 shall be applicable to any authenticating agent. 
 If an authenticating agent is appointed pursuant to this
Section 16.10, the Notes may have endorsed thereon, in addition to the Trustee’s certificate of authentication, an alternative certificate of authentication in the following form: 

                          
                  , 
 as Authenticating Agent, certifies that
this is one of the Notes described 
 in the within-named Indenture. 
  

			
	By:	 	 
	Authorized Officer

 Section 16.11. Execution in Counterparts. This Indenture may be executed in any number of
counterparts, each of which shall be an original, but such counterparts shall together constitute but one and the same instrument. The exchange of copies of this Indenture and of signature pages by facsimile or PDF transmission shall constitute
effective execution and delivery of this Indenture as to the parties hereto and may be used in lieu of the original Indenture for all purposes. Signatures of the parties hereto transmitted by facsimile or PDF shall be deemed to be their original
signatures for all purposes. 
 Section 16.12. Severability. In the event any provision of this Indenture or in the Notes shall
be invalid, illegal or unenforceable, then (to the extent permitted by law) the validity, legality or enforceability of the remaining provisions shall not in any way be affected or impaired. 

Section 16.13. Waiver of Jury Trial. EACH OF THE COMPANY 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 TRANSACTIONS CONTEMPLATED HEREBY. 

Section 16.14. Force Majeure. In no event shall the Trustee 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 acts of God, and interruptions, loss or malfunctions of utilities, communications or computer (software and hardware) services; it being understood that the Trustee shall use reasonable efforts that are consistent with
accepted practices in the banking industry to resume performance as soon as practicable under the circumstances. 
 Section 16.15.
Calculations. 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 Prices of the Common Stock, the Trading Prices,
the Daily VWAPs, the Daily Conversion Values, the Daily Settlement Amounts, accrued interest payable on the Notes and the Conversion Rate of the Notes. The Company shall make all these 

  
 84 

 
calculations in good faith and, absent manifest error, the Company’s calculations shall be final and binding on Holders of Notes. The Company shall provide a schedule of its calculations to
each of the Trustee and the Conversion Agent, and each of the Trustee and Conversion Agent is entitled to rely conclusively upon the accuracy of the Company’s calculations without independent verification. The Trustee will forward the
Company’s calculations to any Holder of Notes upon the written request of that Holder at the sole cost and expense of the Company. 

Section 16.16. U.S.A. Patriot Act. The parties hereto acknowledge that in accordance with Section 326 of the U.S.A. Patriot
Act, the Trustee (in all of its capacities), like all financial institutions and in order to help fight the funding of terrorism and money laundering, is required to obtain, verify, and record information that identifies each person or legal entity
that establishes a relationship or opens an account with the Trustee. The parties to this Indenture agree that they will provide the Trustee with such information as it may request in order for the Trustee to satisfy the requirements of the U.S.A.
Patriot Act. 
 [Remainder of page intentionally left blank] 

  
 85 

 IN WITNESS WHEREOF, the parties hereto have caused this Indenture to be duly executed as of the
date first written above. 
  

			
	TWITTER, INC.
		
	By:	 	 /s/ Vijaya Gadde

	Name:	 	Vijaya Gadde
	Title:	 	General Counsel and Secretary
	
	U.S. BANK NATIONAL ASSOCIATION, as Trustee
		
	By:	 	 /s/ Paula Oswald

	Name:	 	Paula Oswald
	Title:	 	Vice President

 EXHIBIT A 

[FORM OF FACE OF NOTE] 
 [INCLUDE
FOLLOWING LEGEND IF A GLOBAL NOTE] 
 [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 HEREUNDER 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.] 
 [INCLUDE FOLLOWING LEGEND IF A
RESTRICTED SECURITY] 
 [THIS SECURITY AND THE COMMON STOCK, IF ANY, ISSUABLE UPON CONVERSION OF THIS SECURITY HAVE NOT BEEN REGISTERED
UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED EXCEPT IN ACCORDANCE WITH THE FOLLOWING SENTENCE. BY ITS ACQUISITION HEREOF OR OF A BENEFICIAL INTEREST
HEREIN, THE ACQUIRER: 
 (1) REPRESENTS THAT IT AND ANY ACCOUNT FOR WHICH IT IS ACTING IS A “QUALIFIED INSTITUTIONAL
BUYER” (WITHIN THE MEANING OF RULE 144A UNDER THE SECURITIES ACT) AND THAT IT EXERCISES SOLE INVESTMENT DISCRETION WITH RESPECT TO EACH SUCH ACCOUNT, AND 

(2) AGREES FOR THE BENEFIT OF TWITTER, INC. (THE “COMPANY”) THAT IT WILL NOT OFFER, SELL, PLEDGE OR OTHERWISE
TRANSFER THIS SECURITY OR ANY BENEFICIAL INTEREST HEREIN PRIOR TO THE DATE THAT IS THE LATER OF (X) ONE YEAR AFTER THE LAST ORIGINAL ISSUE DATE HEREOF OR SUCH SHORTER PERIOD OF TIME AS PERMITTED BY RULE 144 UNDER THE SECURITIES ACT OR ANY
SUCCESSOR PROVISION THERETO AND (Y) SUCH LATER DATE, IF ANY, AS MAY BE REQUIRED BY APPLICABLE LAW, EXCEPT: 
 (A) TO THE
COMPANY OR ANY SUBSIDIARY THEREOF, OR 
 (B) PURSUANT TO A REGISTRATION STATEMENT WHICH HAS BECOME EFFECTIVE UNDER THE
SECURITIES ACT, OR 

  
 A-1 

 (C) TO A QUALIFIED INSTITUTIONAL BUYER IN COMPLIANCE WITH RULE 144A UNDER THE
SECURITIES ACT, OR 
 (D) PURSUANT TO AN EXEMPTION FROM REGISTRATION PROVIDED BY RULE 144 UNDER THE SECURITIES ACT OR ANY
OTHER AVAILABLE EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT. 
 PRIOR TO THE REGISTRATION OF ANY TRANSFER IN
ACCORDANCE WITH CLAUSE (2)(D) ABOVE, THE COMPANY AND THE TRUSTEE RESERVE THE RIGHT TO REQUIRE THE DELIVERY OF SUCH LEGAL OPINIONS, CERTIFICATIONS OR OTHER EVIDENCE AS MAY REASONABLY BE REQUIRED IN ORDER TO DETERMINE THAT THE PROPOSED TRANSFER
IS BEING MADE IN COMPLIANCE WITH THE SECURITIES ACT AND APPLICABLE STATE SECURITIES LAWS. NO REPRESENTATION IS MADE AS TO THE AVAILABILITY OF ANY EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT.] 

  
 A-2 

 Twitter, Inc. 

1.00% Convertible Senior Note due 2021 
 No.
R-[    ] 
 CUSIP No.
[                    ] 
 ISIN No.
[                    ] 
 Twitter, Inc.,
a corporation duly organized and validly existing under the laws of the State of Delaware (the “Company,” which term includes any successor corporation or other entity under the Indenture referred to on the reverse hereof), for
value received hereby promises to pay to CEDE & CO., or registered assigns, the principal sum as set forth in the “Schedule of Exchanges of Notes” attached hereto, which amount, taken together with the principal amounts of all
other outstanding Notes, shall not, unless permitted by the Indenture, exceed $900,000,000 in aggregate at any time (as increased by an amount of up to $100,000,000 aggregate principal amount of any additional Notes purchased by the Initial
Purchasers pursuant to the exercise of their over-allotment option as set forth in the Purchase Agreement), in accordance with the rules and procedures of the Depositary, on September 15, 2021, and interest thereon as set forth below. 

This Note shall bear interest at the rate of 1.00% per year from September 17, 2014, or from the most recent date to which interest
has been paid or provided for to, but excluding, the next scheduled Interest Payment Date until September 15, 2021. Accrued interest on this Note shall be computed on the basis of a 360-day year composed of twelve 30-day months and, for partial
months, on the basis of actual days elapsed over a 30-day month. Interest is payable semi-annually in arrears on each March 15 and September 15, commencing on March 15, 2015, to Holders of record at the close of business on the
preceding March 1 and September 1 (whether or not such day is a Business Day), respectively. Additional Interest will be payable as set forth in Section 4.06(d), Section 4.06(e) and Section 6.03 of the within-mentioned
Indenture, and any reference to interest on, or in respect of, any Note therein shall be deemed to include Additional Interest if, in such context, Additional Interest is, was or would be payable pursuant to any of such Section 4.06(d),
Section 4.06(e) or Section 6.03, and any express mention of the payment of Additional Interest in any provision therein shall not be construed as excluding Additional Interest in those provisions thereof where such express mention is not
made. 
 Any Defaulted Amounts shall accrue interest per annum at the rate borne by the Notes, from, and including, the relevant payment
date to, but excluding, the date on which such Defaulted Amounts shall have been paid by the Company, at its election, in accordance with Section 2.03(c) of the Indenture. 

The Company shall pay the principal of and interest on this Note, if and so long as such Note is a Global Note, in immediately available funds
in lawful money of the United States at the time to the Depositary or its nominee, as the case may be, as the registered Holder of such Note. As provided in and subject to the provisions of the Indenture, the Company shall pay the principal of any
Notes (other than Notes that are Global Notes) at the office or agency designated by the Company for that purpose. The Company has initially designated the Trustee as its Paying Agent and Note Registrar in respect of the Notes and its Corporate
Trust Office, as a place where Notes may be presented for payment or for registration of transfer and exchange. 

  
 A-3 

 Reference is made to the further provisions of this Note set forth on the reverse hereof,
including, without limitation, provisions giving the Holder of this Note the right to convert this Note into cash, shares of Common Stock or a combination of cash and shares of Common Stock, as applicable, on the terms and subject to the limitations
set forth in the Indenture. Such further provisions shall for all purposes have the same effect as though fully set forth at this place. 

This Note, and any claim, controversy or dispute arising under or related to this Note, shall be construed in accordance with and governed
by the laws of the State of New York. 
 In the case of any conflict between this Note and the Indenture, the provisions of the
Indenture shall control and govern. 
 This Note 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] 

  
 A-4 

 IN WITNESS WHEREOF, the Company has caused this Note to be duly executed. 

 

			
	TWITTER, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	

 Dated: 
  

 

			
	TRUSTEE’S CERTIFICATE OF AUTHENTICATION
	
	 U.S. BANK NATIONAL ASSOCIATION

as Trustee, certifies that this is one of the Notes described

	in the within-named Indenture.
		
	By:	 	  

		 	Authorized Signatory

  

 [FORM OF REVERSE OF NOTE] 

Twitter, Inc. 
 1.00% Convertible
Senior Note due 2021 
 This Note is one of a duly authorized issue of Notes of the Company, designated as its 1.00% Convertible Senior
Notes due 2021 (the “Notes”), initially limited to the aggregate principal amount of $900,000,000 (as increased by an amount of up to $100,000,000 aggregate principal amount of any additional Notes purchased by the Initial
Purchasers pursuant to the exercise of their over-allotment option as set forth in the Purchase Agreement) all issued or to be issued under and pursuant to an Indenture dated as of September 17, 2014 (as amended or supplemented from time to
time in accordance with its terms, the “Indenture”), between the Company and U.S. Bank National Association (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 and the Holders of the Notes. Additional Notes may be issued in an unlimited aggregate principal amount, subject to
certain conditions specified in the Indenture. Capitalized terms used in this Note and not defined in this Note shall have the respective meanings set forth in the Indenture. 

In case certain Events of Default, as defined in the Indenture, shall have occurred and be continuing, the principal of, and interest on, all
Notes may be declared, by either the Trustee or Holders of at least 25% in aggregate principal amount of Notes then outstanding, and upon said declaration shall become, due and payable, in the manner, with the effect and subject to the conditions
and certain exceptions set forth 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 on the Fundamental Change Repurchase Date and the principal amount on the Maturity Date, as the case may be, to the Holder who surrenders a Note to a Paying Agent to
collect such payments in respect of the Note. 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
Notes, and in certain other circumstances, with the consent of the Holders of not less than a majority in aggregate principal amount of the Notes at the time outstanding, evidenced as in the Indenture provided, to execute supplemental indentures
modifying the terms of the Indenture and the Notes as described therein. It is also provided in the Indenture that, subject to certain exceptions, the Holders of a majority in aggregate principal amount of the Notes at the time outstanding may on
behalf of the Holders of all of the Notes waive any past Default or Event of Default under the Indenture and its consequences. 
 No
reference herein to the Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay or deliver, as the case may be, the principal (including the
Fundamental Change Repurchase Price, if applicable) of, accrued and unpaid interest on, and the consideration due upon conversion of, this Note at the place, at the respective times, at the rate and in the lawful money herein prescribed. 

  
 R-1 

 The Notes 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, Notes may be exchanged for a like aggregate principal amount of
Notes of other authorized denominations, without payment of any service charge but, if required by the Company or Trustee, with payment of a sum sufficient to cover any transfer or similar tax that may be imposed in connection therewith as a result
of the name of the Holder of the new Notes issued upon such exchange of Notes being different from the name of the Holder of the old Notes surrendered for such exchange. 

The Notes are not subject to redemption through the operation of any sinking fund or otherwise. 

Upon the occurrence of a Fundamental Change prior to the Maturity Date, the Holder has the right, at such Holder’s option exercised in
the manner specified in the Indenture, to require the Company to repurchase for cash all of such Holder’s Notes or any portion thereof (in principal amounts of $1,000 or integral multiples thereof) on the Fundamental Change Repurchase Date at a
price equal to the Fundamental Change Repurchase Price. 
 Subject to the provisions of the Indenture, the Holder hereof has the right, at
its option, during certain periods and upon the occurrence of certain conditions specified in the Indenture, prior to the close of business on the second Scheduled Trading Day immediately preceding the Maturity Date, to convert any Notes or portion
thereof that is $1,000 or an integral multiple thereof, into, at the Company’s election, cash, shares of Common Stock or a combination of cash and shares of Common Stock, as applicable, as set forth in the Indenture at the Conversion Rate
specified in the Indenture and as adjusted from time to time as provided in the Indenture. 
 Terms used in this Note and defined in the
Indenture are used herein as therein defined. 

  
 R-2 

 ABBREVIATIONS 

The following abbreviations, when used in the inscription of the face of this Note, shall be construed as though they were written out in full
according to applicable laws or regulations: 
 TEN COM = as tenants in common 

UNIF GIFT MIN ACT = Uniform Gifts to Minors Act 
 CUST =
Custodian 
 TEN ENT = as tenants by the entireties 
 JT TEN =
joint tenants with right of survivorship and not as tenants in common 
 Additional abbreviations may also be used though not in the above
list. 

  
 R-3 

 SCHEDULE A 

SCHEDULE OF EXCHANGES OF NOTES 

Twitter, Inc. 
 1.00% Convertible
Senior Notes due 2021 
 The initial principal amount of this Global Note is
[                    ] DOLLARS ($[        ]). The following increases or decreases in this Global Note have
been made: 
  

									
	     Date of exchange    
	  	Amount of
decrease in
principal amount
    of this Global Note    	  	Amount of
increase in
principal amount
    of this Global Note    	  	Principal amount
of this Global Note
following such
decrease or
    increase    	  	Signature of
authorized
signatory of
Trustee or
    Custodian    
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	
		  		  		  		  	

  
 R-4 

 ATTACHMENT 1 

[FORM OF NOTICE OF CONVERSION] 
 To: Twitter,
Inc. 
 To: U.S. Bank National Association 
 633 West Fifth
Street, 24th Floor 
 Los Angeles, California 90071 

Attention: Paula Oswald (Twitter 1.00% Convertible Senior Notes due 2021) 

The undersigned registered owner of this Note hereby exercises the option to convert this Note, or the portion hereof (that is $1,000 principal amount or an
integral multiple thereof) below designated, into, at the Company’s election, cash, shares of Common Stock or a combination of cash and shares of Common Stock, as applicable, in accordance with the terms of the Indenture referred to in this
Note, and directs that any cash payable and any shares of Common Stock issuable and deliverable upon such conversion, together with any cash for any fractional share, and any Notes representing any unconverted principal amount hereof, be issued and
delivered to the registered Holder hereof unless a different name has been indicated below. If any shares of Common Stock or any portion of this Note not converted are to be issued in the name of a Person other than the undersigned, the undersigned
will pay all documentary, stamp or similar issue or transfer taxes, if any in accordance with Section 13.02(d) and Section 13.02(e) of the Indenture. Any amount required to be paid to the undersigned on account of interest accompanies this
Note. Capitalized terms used herein but not defined shall have the meanings ascribed to such terms in the Indenture. 
  

									
	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 Securities and Exchange Commission Rule 17Ad-15 if shares	 		 		 	

  
 1 

									
	of Common Stock are to be issued, or Notes are to be delivered, other than to and in the name of the registered holder.	 		 		 	
				
	Fill in for registration of shares if to be issued, and Notes 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
				
		 		 		 	NOTICE: The above signature(s) of the Holder(s) hereof must correspond with the name as written upon the face of the Note in every particular without alteration or enlargement or any change whatever.
					
		 		 		 	  
	 	
		 		 		 	Social Security or Other Taxpayer Identification Number	 	

  
 2 

 ATTACHMENT 2 

[FORM OF FUNDAMENTAL CHANGE REPURCHASE NOTICE] 

To: Twitter, Inc. 
 To: U.S. Bank National Association 

633 West Fifth Street, 24th Floor 

Los Angeles, California 90071 
 Attention: Paula Oswald (Twitter
1.00% Convertible Senior Notes due 2021) 
 The undersigned registered owner of this Note hereby acknowledges receipt of a notice from Twitter, Inc. (the
“Company”) as to the occurrence of a Fundamental Change with respect to the Company and specifying the Fundamental Change Repurchase Date and requests and instructs the Company to pay to the registered holder hereof in accordance
with Section 14.02 of the Indenture referred to in this Note (1) the entire principal amount of this Note, or the portion thereof (that is $1,000 principal amount or an integral multiple thereof) below designated, and (2) if such
Fundamental Change Repurchase Date does not fall during the period after a Regular Record Date and on or prior to the Business Day immediately following the corresponding Interest Payment Date, accrued and unpaid interest, if any, thereon to, but
excluding, such Fundamental Change Repurchase Date. 
 In the case of Physical Notes, the certificate numbers of the Notes to be repurchased are as set
forth below: 
  

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

  
 1 

 ATTACHMENT 3 

[FORM OF ASSIGNMENT AND TRANSFER] 
 To: U.S. Bank
National Association 
 as Trustee and Registrar 
 633 West
Fifth Street, 24th Floor 
 Los Angeles, California 90071 

Attention: Paula Oswald (Twitter 1.00% Convertible Senior Notes due 2021) 

For value received
                                         hereby
sell(s), assign(s) and transfer(s) unto                      (Please insert social security or Taxpayer Identification Number of assignee) the within
Note, and hereby irrevocably constitutes and appoints                      attorney to transfer the said Note on the books of Twitter, Inc. (the
“Company”), with full power of substitution in the premises. 
 In connection with any transfer of the within Note occurring prior to the
Resale Restriction Termination Date, as defined in the Indenture governing such Note, the undersigned confirms that such Note is being transferred: 
  ̈ To the Company or a subsidiary thereof; or 
  ̈ Pursuant to a
registration statement that has become or been declared effective under the Securities Act of 1933, as amended; or 

 ̈ Pursuant to and 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 any other
available exemption from the registration requirements of the Securities Act of 1933, as amended. 

  
 1 

	
	Dated:
                                         
           
	
	  

	
	  

	Signature(s)
	
	  

	Signature Guarantee
	
	Signature(s) must be guaranteed by an eligible Guarantor Institution (banks, stockbrokers, savings and loan associations and credit unions) with membership in an approved signature guarantee medallion program pursuant to Securities
and Exchange Commission Rule 17Ad-15 if Notes are to be delivered, other than to and in the name of the registered holder.
	

 NOTICE: The signature on the assignment must correspond with the name as written upon the face of the Note in every particular
without alteration or enlargement or any change whatever. 

  
 2EX-10.1

 Exhibit 10.1 

EXECUTION VERSION 

Twitter, Inc. 
 0.25%
Convertible Senior Notes Due 2019 
 1.00% Convertible Senior Notes Due 2021 

 
  

Purchase Agreement 

September 11, 2014 
 Goldman,
Sachs & Co. 
 Morgan Stanley & Co. LLC 

As representatives of the several Purchasers 

named in Schedule I hereto, 
 c/o Goldman,
Sachs & Co. 
 200 West Street 
 New York, New York
10282 
 c/o Morgan Stanley & Co. LLC 
 1585 Broadway

 New York, New York 10036 
 Ladies and Gentlemen: 

Twitter, Inc., a Delaware corporation (the “Company”), proposes, subject to the terms and conditions stated herein, to issue and sell to the
Purchasers named in Schedule I hereto (the “Purchasers”), for whom you are acting as representatives (the “Representatives”), an aggregate of $900,000,000 principal amount of its 0.25% Convertible Senior Notes due
2019 (the “Firm 2019 Notes”) and an aggregate of $900,000,000 principal amount of its 1.00% Convertible Senior Notes due 2021 (the “Firm 2021 Notes”, and together with the Firm 2019 Notes, the “Firm
Securities”), and at the option of Goldman, Sachs & Co. on behalf of the Purchasers, up to an aggregate of $100,000,000 additional principal amount of 0.25% Convertible Senior Notes due 2019 (the “Optional 2019
Notes”) and up to an aggregate of $100,000,000 additional principal amount of 1.00% Convertible Senior Notes due 2021, in each case solely to cover over-allotments (the “Optional 2021 Notes”, and together with the Optional
2019 Notes, the “Optional Securities”). The Firm Securities and the Optional Securities are herein collectively called the “Securities”. The Firm 2019 Notes and the Optional 2019 Notes are herein collectively called
the “2019 Notes,” and the Firm 2021 Notes and the Optional 2021 Notes are herein collectively called the “2021 Notes.” The Securities will be convertible into cash, shares (the “Underlying Shares”)
of common stock of the Company, par value $0.000005 per share (“Stock”) or a combination of cash and Underlying Shares, at the Company’s election. 

In connection with the offering of the Firm Securities, the Company is separately entering into convertible note hedge transactions and warrant transactions
with one or more counterparties, which may include the Purchasers or affiliates thereof (each, a “Call Spread Counterparty”), 

 
in each case pursuant to a convertible note hedge confirmation (a “Base Bond Hedge Confirmation”) and a warrant confirmation (a “Base Warrant Confirmation”),
respectively, each dated the date hereof (the Base Bond Hedge Confirmations and the Base Warrant Confirmations, collectively, the “Base Call Spread Confirmations”), and in connection with the issuance of any Optional Securities, the
Company and each Call Spread Counterparty may enter into additional convertible note hedge transactions and additional warrant transactions, in each case pursuant to an additional convertible note hedge confirmation (an “Additional Bond
Hedge Confirmation”) and an additional warrant confirmation (an “Additional Warrant Confirmation”), respectively, each to be dated the date on which the option granted to the Purchasers pursuant to Section 2 hereof to
purchase such Optional Securities is exercised (the Additional Bond Hedge Confirmations and the Additional Warrant Confirmations, collectively, the “Additional Call Spread Confirmations” and, together with the Base Call Spread
Confirmations, the “Call Spread Confirmations”). 
 1. The Company represents and warrants to, and agrees with, each of the
Purchasers that: 
 (a) A preliminary offering memorandum, dated September 10, 2014 (the “Preliminary Offering
Memorandum”), and an offering memorandum, dated September 11, 2014 (the “Offering Memorandum”), have been prepared in connection with the offering of the Securities and Underlying Shares, if any, issuable upon
conversion thereof. The Preliminary Offering Memorandum, as amended and supplemented immediately prior to the Applicable Time (as defined in Section 1(b)), is hereinafter referred to as the “Pricing Memorandum”. Any reference
to the Preliminary Offering Memorandum, the Pricing Memorandum or the Offering Memorandum shall be deemed to refer to and include all documents filed with the United States Securities and Exchange Commission (the “Commission”)
pursuant to Section 13(a), 13(c) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), on or prior to the date of such memorandum and incorporated by reference therein and any reference to the
Preliminary Offering Memorandum or the Offering Memorandum, as the case may be, as amended or supplemented, as of any specified date, shall be deemed to include (i) any documents filed with the Commission pursuant to Section 13(a), 13(c)
or 15(d) of the Exchange Act after the date of the Preliminary Offering Memorandum or the Offering Memorandum, as the case may be, and prior to such specified date and (ii) any Additional Issuer Information (as defined in Section 5(f))
furnished by the Company prior to the completion of the distribution of the Securities; and all documents filed under the Exchange Act and so deemed to be included in the Preliminary Offering Memorandum, the Pricing Memorandum or the Offering
Memorandum, as the case may be, or any amendment or supplement thereto are hereinafter called the “Exchange Act Reports” (provided that where only sections of such documents are specifically incorporated by reference, only such
sections shall be considered to be part of the Exchange Act Reports). The Exchange Act Reports, when they were or are filed with the Commission, conformed or will conform in all material respects to the applicable requirements of the Exchange Act
and the applicable rules and regulations of the Commission thereunder; and no such documents were filed with the Commission since the Commission’s close of business on the business day immediately prior to the date of this Agreement and prior
to the execution of this Agreement, except as set forth on Schedule II(a) hereof. The Preliminary Offering Memorandum and the Offering Memorandum and any amendments or supplements 

  
 2 

 
thereto did not and will not, as of their respective dates, contain an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in
the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in
writing to the Company by a Purchaser through the Representatives expressly for use therein; 
 (b) For the purposes of this
Agreement, the “Applicable Time” is 11:40 p.m. (Eastern time) on the date of this Agreement; the Pricing Memorandum as supplemented by the information set forth in Schedule III hereto, taken together (collectively, the
“Pricing Disclosure Package”) as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances
under which they were made, not misleading; and each Company Supplemental Disclosure Document (as defined in Section 6(a)(i)) listed on Schedule II(b) hereto and each Permitted General Solicitation Material (as defined in Section 6(a)(i))
listed on Schedule II(d) hereto) does not conflict with the information contained in the Pricing Memorandum or the Offering Memorandum and each such Company Supplemental Disclosure Document and Permitted General Solicitation Material, as
supplemented by and taken together with the Pricing Disclosure Package as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the
light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to statements or omissions made in a Company Supplemental Disclosure Document or Permitted General
Solicitation Material in reliance upon and in conformity with information furnished in writing to the Company by a Purchaser through the Representatives expressly for use therein; 

(c) Neither the Company nor any of its subsidiaries has sustained since the date of the latest audited financial statements
included in the Pricing Memorandum any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree,
other than as set forth or contemplated in the Pricing Memorandum; and, since the respective dates as of which information is given in the Pricing Memorandum, there has not been any change in the capital stock (other than as a result of the exercise
of stock options, the vesting of restricted stock units or the granting of stock options or restricted stock units in the ordinary course of business pursuant to the Company’s stock plans that are described in the Pricing Memorandum or the
repurchase of shares of Stock which were issued pursuant to the early exercise of stock options by option holders or pursuant to agreements in connection with which the Company acquired businesses or assets from third parties and are subject to
repurchase by the Company) or long-term debt of the Company or any of its subsidiaries or any material adverse change, or any development involving a prospective material adverse change, in or affecting the general affairs, management, financial
position, stockholders’ equity or results of operations of the Company and its subsidiaries, taken as a whole, other than, in each case, as set forth or contemplated in the Pricing Memorandum; 

(d) The Company and its subsidiaries do not own any real property. The Company and its subsidiaries have good and marketable
title to all personal property owned by them (other than with respect to Intellectual Property which is addressed 

  
 3 

 
exclusively in subsection (aa)), in each case free and clear of all liens, encumbrances and defects except such as are described in the Pricing Memorandum or such as do not materially affect the
value of such property and do not materially interfere with the use made and proposed to be made of such property by the Company and its subsidiaries; and any real property and buildings held under lease by the Company and its subsidiaries are held
by them, to the Company’s knowledge, under valid, subsisting and enforceable leases (subject to the effects of (A) bankruptcy, insolvency, fraudulent conveyance, fraudulent transfer, reorganization, moratorium or other similar laws
relating to or affecting rights or remedies of creditors generally; (B) the application of general principles of equity (including without limitation, concepts of materiality, reasonableness, good faith and fair dealing, regardless of whether
enforcement is considered in proceedings at law or in equity); and (C) applicable law and public policy with respect to rights to indemnity and contribution) with such exceptions as are not material and do not materially interfere with the use
made and proposed to be made of such property and buildings by the Company and its subsidiaries; 
 (e) The Company has been
duly incorporated and is validly existing as a corporation in good standing under the laws of the State of Delaware, with power and authority (corporate and other) to own its properties and conduct its business as described in the Pricing
Memorandum, and has been duly qualified as a foreign corporation for the transaction of business and is in good standing under the laws of each other jurisdiction in which it owns or leases properties or conducts any business so as to require such
qualification, except where the failure to be so qualified or be in good standing would not individually or in the aggregate have a material adverse effect on the financial position, stockholders’ equity or results of operations of the Company
and its subsidiaries, taken as a whole (a “Material Adverse Effect”); and each “significant subsidiary” of the Company (each, a “Significant Subsidiary”), as defined in Rule 1-02(w) of Regulation S-X under
the Securities Act of 1933, as amended (the “Act”) (provided that MoPub Inc. shall be considered a Significant Subsidiary for the purposes of this Section 1(e) and Section 1(f)), has been duly incorporated and is validly
existing as a corporation in good standing under the laws of its jurisdiction of incorporation or organization, to the extent that the concept of “good standing” is applicable under the laws of such jurisdiction, except where the failure
to be so qualified or to be in good standing would not, individually or in the aggregate, have a Material Adverse Effect; 

(f) The Company has an authorized capitalization as set forth in the Pricing Disclosure Package and the Offering Memorandum,
and all of the issued shares of capital stock of the Company have been duly authorized and validly issued and are non-assessable; the Underlying Shares issuable upon conversion of the Securities (assuming physical settlement of all conversions) have
been duly authorized and reserved for issuance upon conversion of the Securities and, when issued and delivered in accordance with the provisions of the Securities and the Indentures referred to below, will be validly issued, fully paid and
non-assessable and will conform in all material respects to the description of the Stock contained in the Pricing Disclosure Package and the Offering Memorandum; and all of the issued shares of capital stock of each Significant Subsidiary of the
Company have been duly authorized and validly issued, are fully paid and non-assessable and (except for directors’ qualifying shares) are owned directly or indirectly by the Company, free and clear of all liens, encumbrances, equities or claims
except for such liens, encumbrances, equities or claims that would not reasonably be expected to have a Material Adverse Effect; 

  
 4 

 (g) The Securities have been duly authorized by the Company and, when executed,
authenticated, issued and delivered in accordance with the indenture relating to the 2019 Notes and the indenture relating to the 2021 Notes, each to be dated as of September 17, 2014 (the “Indentures”) between the Company and
U.S. Bank National Association, as Trustee (the “Trustee”), under which they are to be issued, and delivered and paid for pursuant to this Agreement, will constitute valid and legally binding obligations of the Company entitled to
the benefits provided by the Indentures, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent transfers), reorganization, moratorium or similar laws affecting
enforcement of creditors’ rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a proceeding in equity or at law); 

(h) Each Indenture has been duly authorized by the Company and, when executed and delivered by the Company and the Trustee,
such Indenture will constitute a valid and legally binding instrument, enforceable against the Company in accordance with its terms and entitled to the benefits provided by such Indenture; and the Securities and the Indentures will conform in all
material respects to the descriptions thereof in the Pricing Disclosure Package and the Offering Memorandum, except as the enforcement thereof may be limited by bankruptcy, insolvency (including, without limitation, all laws relating to fraudulent
transfers), reorganization, moratorium or similar laws affecting enforcement of creditors’ rights generally and except as enforcement thereof is subject to general principles of equity (regardless of whether enforcement is considered in a
proceeding in equity or at law); 
 (i) Prior to the date hereof, the Company, has not and to its knowledge none of its
affiliates acting on its behalf, has taken any action which is designed to or which has constituted or which would reasonably have been expected to cause or result in stabilization or manipulation of the price of any security of the Company in
connection with the offering of the Securities; 
 (j) The issue and sale of the Securities and the compliance by the Company
with all of the provisions of the Securities, the Indentures, and this Agreement and the consummation of the transactions herein and therein contemplated will not conflict with or result in a breach or violation of any of the terms or provisions of,
or constitute a default under, (A) any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is
bound or to which any of the property or assets of the Company or any of its subsidiaries is subject, (B) the Certificate of Incorporation, By laws or similar organizational documents of the Company or any of its subsidiaries, or (C) any
statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its subsidiaries or any of their properties, except in the case of (A) and (C) for such violations that
would not individually or in the aggregate have a Material Adverse Effect; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental agency or body is required for the issue and sale of
the Securities or the consummation by the Company of the transactions contemplated by this Agreement, or the Indentures, except such consents, approvals, authorizations, orders, registrations or qualifications as may be required under state
securities or Blue Sky laws in connection with the purchase and distribution of the Securities by the Purchasers and listing of the Underlying Shares; 

  
 5 

 (k) Neither the Company nor any of its subsidiaries is (A) in violation of
its Certificate of Incorporation, Bylaws or similar organizational documents or (B) in default in the performance or observance of any material obligation, agreement, covenant or condition contained in any indenture, mortgage, deed of trust,
loan agreement, lease or other agreement or instrument to which it is a party or by which it or any of its properties may be bound, except in the case of (B) for such defaults as would not, individually or in the aggregate have a Material
Adverse Effect; 
 (l) The statements set forth in the Pricing Memorandum and the Offering Memorandum under the caption
“Description of Notes” and “Description of Capital Stock”, insofar as they purport to constitute a summary of the terms of the Securities and the Stock, and under the captions, “Certain U.S. Federal Income Tax
Considerations”, and “Plan of Distribution”, insofar as they purport to describe the provisions of the laws and documents referred to therein, fairly and accurately summarize the matters set forth therein in all material respects;

 (m) Other than as set forth in the Pricing Memorandum, there are no legal or governmental proceedings pending to which the
Company or any of its subsidiaries is a party or, to the Company’s knowledge, of which any property or assets of the Company or any of its subsidiaries is the subject which, if determined adversely to the Company or any of its subsidiaries,
would individually or in the aggregate have a Material Adverse Effect; and, to the Company’s knowledge, no such proceedings are threatened or contemplated by governmental authorities or threatened by others; 

(n) When the Securities are issued and delivered pursuant to this Agreement, the Securities will not be of the same class
(within the meaning of Rule 144A (“Rule 144A”) under the Act) as securities which are listed on a national securities exchange registered under Section 6 of the Exchange Act or quoted in a U.S. automated inter-dealer quotation
system, and will be eligible for resale under Rule 144A; 
 (o) The Company is subject to Section 13 or 15(d) of the
Exchange Act; 
 (p) The Company is not, and after giving effect to the offering and sale of the Securities and the
application of the proceeds thereof as described in the Pricing Disclosure Package and the transactions contemplated by the Call Spread Confirmations, will not be, an “investment company”, as such term is defined in the United States
Investment Company Act of 1940, as amended (the “Investment Company Act”); 
 (q) This Agreement has been
duly authorized, executed and delivered by the Company; 
 (r) Neither the Company nor any person acting on its behalf (other
than the Purchasers, as to which no representation is made) has offered or sold the Securities by means of any general solicitation or general advertising within the meaning of Rule 502(c) under the Act (other than by means of a Permitted General
Solicitation, as defined below); 
 (s) Within the preceding six months, neither the Company nor any other person acting on
behalf of the Company has offered or sold to any person any Securities, or any securities of the same or a similar class as the Securities, other than Securities offered or sold to the Purchasers hereunder. The Company will take reasonable
precautions designed to insure that any offer or sale, direct or indirect, in the United States or to any U.S. person (as defined in Rule 902 under the Act) of any Securities or any substantially similar security issued by the Company, within six
months subsequent to the date on 

  
 6 

 
which the distribution of the Securities has been completed (as notified to the Company by the Representatives), is made under restrictions and other circumstances reasonably designed not to
affect the status of the offer and sale of the Securities in the United States and to U.S. persons contemplated by this Agreement as transactions exempt from the registration provisions of the Act; 

(t) PricewaterhouseCoopers LLP, who have certified certain financial statements of the Company and its subsidiaries, are
independent public accountants as required by the Act and the rules and regulations of the Commission thereunder; 
 (u) The
Company maintains a system of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the Exchange Act) that is designed to comply with the requirements of the Exchange Act and has been designed by the
Company’s principal executive officer and principal financial officer, or under their supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external
purposes in accordance with generally accepted accounting principles as applied in the United States (“U.S. GAAP”) (it being understood that this subsection shall not require the Company to comply with Section 404 of the
Sarbanes-Oxley Act of 2002 as of an earlier date than it would otherwise be required to so comply under applicable law). The Company’s internal control over financial reporting is effective and the Company is not aware of any material
weaknesses in its internal control over financial reporting; 
 (v) Since the date of the latest audited financial statements
included or incorporated by reference in the Pricing Memorandum, there has been no change in the Company’s internal control over financial reporting that has materially and adversely affected, or is reasonably likely to materially and adversely
affect, the Company’s internal control over financial reporting; 
 (w) The Company maintains disclosure controls and
procedures (as such term is defined in Rule 13a-15(e) under the Exchange Act) that are designed to comply with the requirements of the Exchange Act; such disclosure controls and procedures have been designed to ensure that material information
relating to the Company and its subsidiaries is made known to the Company’s principal executive officer and principal financial officer by others within those entities; and such disclosure controls and procedures are effective; 

(x) The financial statements of the Company, together with the related schedules and notes, included in each of the Pricing
Disclosure Package and the Offering Memorandum present fairly the financial position of the Company as of the dates indicated and the results of its operations and cash flows for the periods specified. Such financial statements have been prepared in
conformity with U.S. GAAP applied on a consistent basis throughout the periods involved; 
 (y) The Company and its
subsidiaries own or possess sufficient rights to use all patents, patent rights, licenses, inventions, copyrights, know how (including trade secrets and other unpatented and/or unpatentable proprietary or confidential information, systems or
procedures), trademarks, service marks, trade names and other intellectual property (collectively, “Intellectual Property”) used in, held for use in or necessary for the conduct of the business now operated by them, except where the
failure to own or possess any of the foregoing would not reasonably be expected to have a Material Adverse Effect. Neither the Company nor any of its subsidiaries has received any written notice or claim alleging any infringement, misappropriation,
violation of or conflict with any such rights of others, except in each case as would not, individually or in the 

  
 7 

 
aggregate, reasonably be expected to have a Material Adverse Effect. Except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, there is no
pending or, to the Company’s knowledge, threatened action, suit, proceeding or claim by any party challenging the validity, scope, enforceability or ownership of any Intellectual Property owned by the Company or its subsidiaries, and all
Intellectual Property owned by the Company or its subsidiaries is owned solely by the Company or its subsidiaries, is valid and enforceable, and is owned free and clear of all liens, encumbrances, defects or other restrictions. The Company and its
subsidiaries have taken reasonable steps in accordance with normal industry practice to maintain the confidentiality of all material trade secrets and confidential information owned, used or held for use by the Company or any of its subsidiaries;

 (z) The Company and its subsidiaries have complied in all material respects with their respective privacy policies and
other legal obligations regarding the collection, use, transfer, storage, protection, disposal and disclosure by the Company and its subsidiaries of personal and user information gathered or accessed in the course of their respective operations, and
with respect to all such information, the Company and its subsidiaries have taken the steps reasonably necessary to protect such information against loss and against unauthorized access, use, modification, disclosure or other misuse, and other than
as set forth in the Pricing Memorandum, to the knowledge of the Company, there has been no unauthorized access to or other misuse of such information that would individually or in the aggregate reasonably be expected to have a Material Adverse
Effect; 
 (aa) Each employee benefit plan, within the meaning of Section 3(3) of the Employee Retirement Income
Security Act of 1974, as amended (“ERISA”), for which the Company or any member of its “Controlled Group” (defined as any organization which is a member of a controlled group of corporations within the meaning of
Section 414 of the Internal Revenue Code of 1986, as amended (the “Code”)) would have any liability (each, a “Plan”) has been maintained in compliance with its terms and the requirements of any applicable
statutes, orders, rules and regulations, including but not limited to, ERISA and the Code, except for such noncompliance, as would not, individually or in the aggregate have a Material Adverse Effect; 

(bb) The Company and its subsidiaries possess all licenses, permits, certificates and other authorizations from, and have made
all declarations and filings with, all governmental authorities, required or necessary to own or lease, as the case may be, and to operate their respective properties and to carry on their respective businesses as now or proposed to be conducted as
set forth in the Pricing Memorandum (“Permits”), except where the failure to obtain such Permits would not individually or in the aggregate have a Material Adverse Effect; the Company and its subsidiaries have fulfilled and
performed all of their respective obligations with respect to such Permits and no event has occurred which allows, or after notice or lapse of time would allow, revocation or termination thereof or results in any other impairment of the rights of
the holder of any such Permit except, in each case, as would not individually or in the aggregate have a Material Adverse Effect; 

(cc) Except as described in or incorporated by reference into the Pricing Memorandum, there are no contracts, agreements or
understandings between the Company or any subsidiary and any person granting such person the right to require the Company or any subsidiary to file a registration statement under the Act with respect to any securities of the Company or any
subsidiary; 

  
 8 

 (dd) The Company and each of its subsidiaries have filed all U.S. federal, state,
local and foreign tax returns required to be filed through the date of this Agreement or have requested extensions thereof (except where the failure to file would not, individually or in the aggregate, have a Material Adverse Effect) and have paid
all taxes required to be paid thereon (except for cases in which the failure to file or pay would not, individually or in the aggregate, have a Material Adverse Effect, or, except as currently being contested in good faith and for which reserves
required by U.S. GAAP have been created in the financial statements of the Company), and no unpaid tax deficiency has been determined adversely to the Company or any of its subsidiaries which has had a Material Adverse Effect; neither the Company
nor any of its subsidiaries have notice or knowledge of any unpaid tax deficiency which is reasonably expected to be determined adversely to the Company or its subsidiaries and would reasonably be expected to have a Material Adverse Effect; 

(ee) The Company and its subsidiaries (i) are in compliance with any and all applicable foreign, federal, state and local
laws and regulations relating to the protection of human health and safety, the environment or hazardous or toxic substances, wastes or materials, pollutants or contaminants (“Environmental Laws”), (ii) have received all
permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their respective businesses and (iii) are in compliance with all terms and conditions of any such permit, license or approval, except where
such non-compliance with Environmental Laws, failure to receive required permits, licenses or other approvals or failure to comply with the terms and conditions of such permits, licenses or approvals would not individually or in the aggregate have a
Material Adverse Effect; 
 (ff) There are no costs or liabilities associated with Environmental Laws (including, without
limitation, any capital or operating expenditures required for clean-up, closure of properties or compliance with Environmental Laws or any permit, license or approval, any related constraints on operating activities and any potential liabilities to
third parties) which would individually or in the aggregate have a Material Adverse Effect; 
 (gg) The Company and its
subsidiaries taken as a whole are insured by insurers of recognized financial responsibility against such losses and risks and in such amounts as the Company believes are prudent and customary in the businesses in which they are engaged; 

(hh) Neither the Company nor any of its subsidiaries, nor any director or executive officer thereof, nor, to the Company’s
knowledge, any affiliate of the Company or any of its subsidiaries or any employee, agent or representative of the Company or of any of its subsidiaries or affiliates, has taken any action in furtherance of an offer, payment, promise to pay, or
authorization or approval of the payment or giving of money, property, gifts or anything else of value, directly or indirectly, to any “government official” (including any officer or employee of a government or government-owned or
controlled entity or of a public international organization, or any person acting in an official capacity for or on behalf of any of the foregoing, or any political party or party official or candidate for political office) to corruptly influence
official action or secure an improper advantage for the Company; and the Company and its subsidiaries have conducted their businesses in compliance in all material respects with applicable anti-corruption laws, including the Foreign Corrupt
Practices Act of 1977, as amended, and have instituted and maintain policies and procedures designed to promote and achieve compliance with such laws in all material respects; 

  
 9 

 (ii) The operations of the Company and its subsidiaries are conducted in material
compliance with all applicable financial recordkeeping and reporting requirements, including those of the Bank Secrecy Act, as amended by Title III of the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and
Obstruct Terrorism Act of 2001 (USA PATRIOT Act), and the applicable anti-money laundering statutes of jurisdictions where the Company and its subsidiaries conduct business, the rules and regulations thereunder and any related or similar rules,
regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the “Anti-Money Laundering Laws”), and no action, suit or proceeding by or before any court or governmental agency, authority or
body or any arbitrator involving the Company or any of its subsidiaries with respect to the Anti-Money Laundering Laws is pending or, to the knowledge of the Company, threatened; 

(jj) (A) Neither the Company nor any of its subsidiaries, nor any director or executive officer thereof, nor, to the
Company’s knowledge, any employee, agent, affiliate or representative of the Company or any of its subsidiaries, is an individual or entity (“Person”) that is, or is owned or controlled by a Person that is: 

(1) the subject of any sanctions administered or enforced by the Office of Foreign Assets Control (“OFAC”)
(collectively, “Sanctions”), nor 
 (2) located, organized or resident in a country or territory that is the
subject of Sanctions (including, without limitation, Cuba, Iran, North Korea, Sudan and Syria); 
 (B) The Company will not,
directly or indirectly, knowingly use the proceeds of the offering, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other Person: 

(1) to fund or facilitate any activities or business of or with any Person or in any country or territory that, at the time of
such funding or facilitation, is the subject of Sanctions; or 
 (2) in any other manner that will result in a violation of
Sanctions by any Person (including any Person participating in the offering, whether as underwriter, advisor, investor or otherwise); and 

(C) For the past 5 years, the Company and its subsidiaries have not knowingly engaged in, are not now knowingly engaged in and
will not knowingly engage in any dealings or transactions with any Person, or in any country or territory, that at the time of the dealing or transaction is or was the subject of Sanctions; and 

(kk) There are no debt securities or preferred stock of, or guaranteed by, the Company that are rated by a “nationally
recognized statistical rating organization,” as such term is defined in Section 3(a)(62) of the Exchange Act. 
 2. Subject to the
terms and conditions herein set forth, (a) the Company agrees to issue and sell to each of the Purchasers, and each of the Purchasers agrees, severally and not jointly, to purchase from the Company, at a purchase price of (i) 98.5% of the
principal amount of the 2019 Notes and (ii) 98.5% of the principal amount of the 2021 Notes (the “Purchase Price”), plus accrued interest, if any, from September 17, 2014 to the first Time of Delivery (as defined in
Section 4 hereof), the principal amount of Securities set forth opposite the name of such Purchaser in Schedule I hereto, and (b) in the event and to the extent that the Purchasers shall exercise the election to purchase Optional
Securities as provided below, the Company agrees to issue and sell to each of the Purchasers, and each of the Purchasers agrees, 

  
 10 

 
severally and not jointly, to purchase from the Company, at the Purchase Price set forth in clause (a) of this Section 2, that portion of the aggregate principal amount of the Optional
Securities as to which such election shall have been exercised (to be adjusted by you so as to eliminate fractions of $1,000), determined by multiplying such aggregate principal amount of Optional Securities by a fraction, the numerator of which is
the maximum aggregate principal amount of Optional Securities that such Purchaser is entitled to purchase as set forth opposite the name of such Purchaser in Schedule I hereto and the denominator of which is the maximum aggregate principal amount of
Optional Securities that all of the Purchasers are entitled to purchase hereunder. 
 The Company hereby grants to the Purchasers the right
to purchase at their option up to $100,000,000 aggregate principal amount of Optional 2019 Notes and up to $100,000,000 aggregate principal amount of Optional 2021 Notes, solely to cover over-allotments, at the purchase price set forth in clause
(a) of the first paragraph of this Section 2 plus accrued interest, if any, from September 17, 2014 to such Subsequent Time of Delivery (as defined in Section 4 hereof). Any such election to purchase Optional Securities may be
exercised by written notice from the Representatives on behalf of the Purchasers to the Company, given within a period of 30 calendar days from the date of this Agreement, setting forth the aggregate principal amount of each series of Optional
Securities to be purchased and the date on which such Optional Securities are to be delivered, as determined by the Representatives but in no event earlier than the First Time of Delivery or, unless you and the Company otherwise agree in writing,
earlier than three or later than ten New York Business Days (as defined below) after the date of such notice. 
 3. Upon the authorization
by you of the release of the Securities, the several Purchasers propose to offer the Securities for sale upon the terms and conditions set forth in this Agreement and the Offering Memorandum and each Purchaser, acting severally and not jointly,
hereby represents and warrants to, and agrees with the Company that: 
 (a) it will sell the Securities only to persons who
it reasonably believes are “qualified institutional buyers” (“QIBs”) within the meaning of Rule 144A under the Act in transactions meeting the requirements of Rule 144A; 

(b) It is a QIB within the meaning of Rule 144A under the Act or an Institutional Accredited Investor, within the meaning of
Rule 501(a) under the Act; and 
 (c) Neither it nor any of its affiliates or any other person acting on its or their behalf
will solicit offers for, or offer or sell, the Securities by means of any form of general solicitation or general advertising within the meaning of Rule 502(c) of Regulation D or in any manner involving a public offering within the meaning of
Section 4(1)(2) of the Securities Act. 
 4. (a) The Securities to be purchased by each Purchaser hereunder will be represented by
definitive global Securities in book-entry form which will be deposited by or on behalf of the Company with The Depository Trust Company (“DTC”) or its designated custodian. The Company will deliver the Securities to the
Representatives, for the account of each Purchaser, against payment by or on behalf of such Purchaser of the purchase price therefor by wire transfer of Federal (same day) funds, by causing DTC to credit the Securities to the account of Goldman,
Sachs & Co. at DTC. The Company will cause the certificates representing the Securities to be made available to the Representatives for checking at least twenty-four hours prior to each Time of Delivery (as defined below) at the office of
Davis Polk & Wardwell LLP, 1600 El Camino Real, Menlo Park, California 94025 (the “Closing Location”). The time and date of such delivery and payment shall be 9:30 a.m., New York City time, on September 17, 2014 or
such other time and date as the Representatives and the Company may 

  
 11 

 
agree upon in writing, and with respect to the Optional Securities, 9:30 a.m. New York City time, on the date specified by you in the written notice given by the Representatives of the
Purchasers’ election to purchase such Optional Securities, or such other time and date as the Representatives and the Company may agree upon in writing; provided, however, that such delivery date must be at least three New York Business Days
(as defined below) after such written notice is given and may not be earlier than the First Time of Delivery (as defined below) nor later than ten New York Business Days (as defined below) after the date of such notice; provided further, that solely
with respect to an Optional Securities written notice that is delivered prior to the First Time of Delivery, the related Time of Delivery (as defined below) must be at least one New York Business Day after the written notice is given. Such time and
date for delivery of the Firm Securities are herein called the “First Time of Delivery”, any such time and date for delivery of the Optional Securities, if not the First Time of Delivery, are herein called a “Subsequent Time
of Delivery”, and each such time and date for delivery are herein called a “Time of Delivery”. 

(b) The documents to be delivered at each Time of Delivery by or on behalf of the parties hereto pursuant to Section 8
hereof, including the cross-receipt for the Securities and any additional documents requested by the Purchasers pursuant to Section 8(k) hereof, will be delivered at such time and date at the Closing Location, and the Securities will be
delivered at the office of DTC (or its designated custodian), all at such Time of Delivery. A meeting will be held at the Closing Location at 5:00 p.m., New York City time, on the New York Business Day next preceding such Time of Delivery, at which
meeting the final drafts of the documents to be delivered pursuant to the preceding sentence will be available for review by the parties hereto. For the purposes of this Section 4, “New York Business Day” shall mean each
Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in New York are generally authorized or obligated by law or executive order to close. 

5. The Company agrees with each of the Purchasers: 

(a) To prepare the Offering Memorandum in a form approved by you; to make no amendment or any supplement to the Offering
Memorandum which shall be disapproved by you promptly after reasonable notice thereof; and to furnish you with copies thereof; 

(b) Promptly from time to time to take such action as you may reasonably request to qualify the Securities and the Underlying
Securities for offering and sale under the securities laws of such jurisdictions as you may reasonably request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be
necessary to complete the distribution of the Securities, provided that in connection therewith the Company shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction or subject
itself to taxation in such jurisdiction in which it was not otherwise subject to taxation as a foreign corporation; 
 (c) To
furnish the Purchasers with written and electronic copies of the Offering Memorandum and any amendment or supplement thereto in such quantities as you may from time to time reasonably request, and if, at any time prior to the expiration of nine
months after the date of the Offering Memorandum, any event shall have occurred as a result of which the Offering Memorandum as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact
necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Offering Memorandum is delivered, not misleading, or, if for any other reason it shall be necessary during such same period to

  
 12 

 
amend or supplement the Offering Memorandum, to notify you and upon your request to prepare and furnish without charge to each Purchaser and to any dealer in securities (whose name and address
the Purchasers shall furnish to the Company) as many written and electronic copies as you may from time to time reasonably request of an amended Offering Memorandum or a supplement to the Offering Memorandum which will correct such statement or
omission or effect such compliance; 
 (d) During the period beginning from the date hereof and continuing until the date
that is 60 days after the date of the Offering Memorandum, not to (i) offer, issue, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise transfer or dispose of, directly or indirectly, or file with the
Commission a registration statement under the Act relating to any securities of the Company that are substantially similar to the Securities or the Stock, including but not limited to any options or warrants to purchase shares of Stock or any
securities that are convertible into or exchangeable for, or that represent the right to receive, Stock or any such substantially similar securities, or publicly disclose the intention to make any offer, sale, pledge, disposition or filing or
(ii) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of the Stock or any such other securities, whether any such transaction described in clause (i) or
(ii) above is to be settled by delivery of Stock or such other securities, in cash or otherwise, without the prior written consent of Goldman, Sachs & Co. provided, however, that the foregoing restrictions shall not apply to
(a) the issuance of Securities to be sold hereunder, the issuance of Underlying Shares upon the conversion of the Securities, and the entry into, or the issuance by the Company of any Stock upon settlement or termination of, the warrant
transactions evidenced by the Base Warrant Confirmations and any Additional Warrant Confirmations, (b) the issuance by the Company of shares of Common Stock upon the exercise of an option or warrant, the settlement of restricted stock units or
the conversion or exchange of convertible or exchangeable securities outstanding as of the date of this Agreement and described in the Pricing Memorandum, (c) the issuance by the Company of shares of Common Stock or securities convertible into,
exchangeable for or that represent the right to receive shares of Common Stock, in each case pursuant to the Company’s stock plans that are described in the Pricing Memorandum, (d) the issuance by the Company of shares of Common Stock or
securities convertible into, exchangeable for or that represent the right to receive shares of Common Stock in connection with (i) the acquisition by the Company or any of its subsidiaries of the securities, business, technology, property or
other assets of another person or entity or pursuant to an employee benefit plan assumed by the Company in connection with such acquisition, and the issuance of any such securities pursuant to any such agreement, or (ii) the Company’s
joint ventures, commercial relationships and other strategic transactions or (e) the filing of any registration statement on Form S-8 relating to securities granted or to be granted pursuant to the Company’s stock plans that are described
in the Pricing Memorandum or any assumed employee benefit plan contemplated by clause (d); provided that the aggregate number of shares of Common Stock that the Company may sell or issue or agree to sell or issue pursuant to clause
(d) shall not exceed 10% of the total number of shares of Common Stock outstanding immediately following the completion of the transactions contemplated by this Agreement; and provided, further, that in the case of clause (d),
(i) that each recipient of any such securities issued pursuant thereto shall agree to transfer restrictions substantially to the effect set forth in Annex D hereto and (ii) the Company shall enter stop transfer instructions with the
Company’s transfer agent and registrar on such securities, which the Company agrees it will not waive or amend without your prior written consent; 

  
 13 

 (e) Not to be or become, at any time prior to the expiration of two years after
the First Time of Delivery, an open-end investment company, unit investment trust, closed-end investment company or face-amount certificate company that is or is required to be registered under Section 8 of the Investment Company Act; 

(f) At any time when the Company is not subject to Section 13 or 15(d) of the Exchange Act, for the benefit of holders
from time to time of Securities, to furnish at its expense, upon request, to holders of Securities and prospective purchasers of Securities designated by such holders, information (the “Additional Issuer Information”) satisfying the
requirements of subsection (d)(4)(i) of Rule 144A under the Act; 
 (g) To furnish to the holders of the Securities as soon
as practicable after the end of each fiscal year an annual report (including a balance sheet and statements of income, stockholders’ equity and cash flows of the Company and its consolidated subsidiaries certified by independent public
accountants) and, as soon as practicable after the end of each of the first three quarters of each fiscal year (beginning with the fiscal quarter ending after the date of the Offering Memorandum), to make available to its stockholders consolidated
summary financial information of the Company and its subsidiaries for such quarter in reasonable detail; provided that the Company may satisfy the requirements of this subsection (g) by electronically filing such reports or information
through EDGAR as long as the Company files all reports required under Section 13 or 15(d) of the Exchange Act; 
 (h)
The Company will not, and will not permit any of its controlled “affiliates” (as defined in Rule 144 under the Act) to, resell any of the Securities which constitute “restricted securities” under Rule 144 that have been
reacquired by any of them (other than pursuant to a registration statement that has been declared effective under the Act) for a period of one (1) year after the last date of issuance of such Securities; 

(i) To use the net proceeds received by the Company from the sale of the Securities pursuant to this Agreement in the manner
specified in the Pricing Memorandum under the caption “Use of Proceeds”; 
 (j) To reserve and keep available at
all times, free of preemptive rights, shares of Stock for the purpose of enabling the Company to satisfy any obligations to issue shares of its Stock upon conversion of the Securities; and 

(k) To use its reasonable best efforts to list for trading, subject to notice of issuance, the Underlying Securities on the New
York Stock Exchange. 
 6. (a) (i) The Company represents and agrees that, without the prior consent of the Representatives, it and its
affiliates and any other person acting on its or their behalf (other than the Purchasers, as to which no statement is given) (x) have not made and will not make any offer relating to the Securities that, if the offering of the Securities
contemplated by this Agreement were conducted as a public offering pursuant to a registration statement filed under the Act with the Commission, would constitute an “issuer free writing prospectus”, as defined in Rule 433 under the Act
(any such offer is hereinafter referred to as a “Company Supplemental Disclosure Document”) and (y) have not solicited and will not solicit offers for, and have not offered or sold and will not offer or sell, the Securities by
means of any form of general solicitation or general advertising within the meaning of Rule 502(c) of Regulation D other than any such solicitation listed on Schedule II(d) (each such solicitation, a “Permitted General
Solicitation”; each written general solicitation document listed on Schedule II(d), a “Permitted General Solicitation Material”); 

  
 14 

 (ii) each Purchaser, severally and not jointly, represents and agrees that,
without the prior consent of the Company and the Representatives, other than one or more term sheets relating to the Securities containing customary information and conveyed to purchasers of securities or any Permitted General Solicitation Material,
it has not made and will not make any offer relating to the Securities that, if the offering of the Securities contemplated by this Agreement were conducted as a public offering pursuant to a registration statement filed under the Act with the
Commission, would constitute a “free writing prospectus”, as defined in Rule 405 under the Act (any such offer (other than any such term sheets and any Permitted General Solicitation Material), is hereinafter referred to as a
“Purchaser Supplemental Disclosure Document”); and 
 (iii) any Company Supplemental Disclosure Document, Purchaser
Supplemental Disclosure Document or Permitted General Solicitation Material, the use of which has been consented to by the Company and the Representatives, is listed as applicable on Schedule II(b), Schedule II(c) or Schedule II(d) hereto,
respectively. 
 7. The Company covenants and agrees with the several Purchasers that the Company will pay or cause to be paid the
following: (i) the fees, disbursements and expenses of the Company’s counsel and accountants in connection with the issue of the Securities and the Underlying Securities and all other expenses in connection with the preparation, printing,
reproduction and filing of the Preliminary Offering Memorandum and the Offering Memorandum and any amendments and supplements thereto and the mailing and delivering of copies thereof to the Purchasers and dealers; (ii) the cost of printing or
producing any Agreement among Purchasers, this Agreement, the Indentures, the Securities, closing documents (including any compilations thereof), Permitted General Solicitation Materials and any other documents in connection with the offering,
purchase, sale and delivery of the Securities; (iii) all expenses in connection with the qualification of the Securities and the Underlying Securities for offering and sale under state securities laws as provided in Section 5(b) hereof,
including the reasonably documented fees and disbursements of one counsel in each jurisdiction for the Purchasers in connection with such qualification and in connection with the Blue Sky and legal investment surveys (such fees not to exceed
$10,000); (iv) any fees charged by securities rating services for rating the Securities; (v) the cost of preparing the Securities; (vi) the fees and expenses of the Trustee and any agent of the Trustee and the fees and disbursements
of counsel for the Trustee in connection with the Indentures and the Securities; (vii) any cost incurred in connection with the listing of the Underlying Securities; (viii) any other costs and expenses related to the transfer and delivery
of the Securities to the Purchasers, including any transfer taxes or other taxes payable thereon; and (ix) all other costs and expenses incident to the performance of its obligations hereunder which are not otherwise specifically provided for
in this Section. It is understood, however, that, except as provided in this Section, and Sections 9 and 12 hereof, the Purchasers will pay all of their own costs and expenses, including the fees of their counsel, transfer taxes on resale of any of
the Securities by them, and any advertising expenses connected with any offers they may make. 

  
 15 

 8. The obligations of the Purchasers hereunder shall be subject, in their discretion, to the
condition that all representations and warranties and other statements of the Company herein are, at and as of each Time of Delivery, true and correct, the condition that the Company shall have performed all of its obligations hereunder theretofore
to be performed, and the following additional conditions: 
 (a) Davis Polk & Wardwell LLP, counsel for the
Purchasers, shall have furnished to you such written opinion or opinions, dated such Time of Delivery, with respect to such matters as you may reasonably request, in form and substance attached hereto as Annex A, and such counsel shall have received
such papers and information as they may reasonably request to enable them to pass upon such matters; 
 (b) Wilson Sonsini
Goodrich & Rosati, Professional Corporation, counsel for the Company, shall have furnished to you such written opinion or opinions, dated such Time of Delivery, in form and substance attached hereto as Annex B; 

(c) On the date of this Agreement and also at each Time of Delivery, PricewaterhouseCoopers LLP shall have furnished to you a
letter or letters, dated the respective dates of delivery thereof (the executed copy of the letter delivered on the date of this Agreement is attached as Annex C(1) hereto and a form of the letter to be delivered at each Time of Delivery is attached
as Annex C(2) hereto); 
 (d) (i) The Company and its subsidiaries, taken as a whole, shall not have sustained since the date
of the latest audited financial statements included in the Pricing Memorandum any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or
governmental action, order or decree, otherwise than as set forth or contemplated in the Pricing Memorandum, and (ii) since the respective dates as of which information is given in the Pricing Memorandum there shall not have been any change in
the capital stock (other than as a result of the exercise of stock options, the vesting of restricted stock units or the granting of stock options or restricted stock units in the ordinary course of business pursuant to the Company’s stock
plans that are described in the Pricing Memorandum or the repurchase of any shares of Stock which were issued pursuant to the early exercise of stock options by option holders or pursuant to agreements in connection with which the Company acquired
businesses or assets from third parties and are subject to repurchase by the Company) or long-term debt of the Company or any of its subsidiaries or any change, or any development involving a prospective change, in or affecting the general affairs,
management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, taken as a whole, otherwise than as set forth or contemplated in the Pricing Memorandum, the effect of which, in any such case
described in clause (i) or (ii), is in your judgment so material and adverse as to make it impracticable or inadvisable to proceed with the offering or the delivery of the Securities being delivered at such Time of Delivery on the terms and in
the manner contemplated in this Agreement and in each of the Pricing Disclosure Package and the Offering Memorandum; 
 (e)
On or after the Applicable Time there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally on the New York Stock Exchange; (ii) a suspension or material limitation in
trading in the Company’s securities on the New York Stock Exchange; (iii) a general moratorium on commercial banking activities declared by either Federal, New York State or California State authorities or a material disruption in
commercial banking or securities settlement or clearance services in the United States; (iv) the outbreak or escalation of hostilities involving the United States or the declaration by the United States of a national emergency or war or
(v) the occurrence of any other calamity or crisis or any change in financial, political or economic conditions in the United States or elsewhere, if the effect 

  
 16 

 
of any such event specified in clause (iv) or (v) in your judgment makes it impracticable or inadvisable to proceed with the offering or the delivery of the Securities being delivered
at such Time of Delivery on the terms and in the manner contemplated in the Pricing Disclosure Package and the Offering Memorandum; 

(f) The Underlying Securities shall have been duly listed, subject to notice of issuance, on the New York Stock Exchange; 

(g) The Company shall have obtained and delivered to the Purchasers executed copies of a lock-up agreement in the form attached
hereto as Annex D from each of the parties listed on Schedule I thereto; 
 (h) The chief financial officer of the Company
shall have furnished to you a certificate (a form of which is attached as Annex E hereto), dated as of such Time of Delivery, in form and substance reasonably satisfactory to you; 

(i) The Purchasers shall have received an executed original copy of the Indentures; 

(j) The Securities shall be eligible for clearance and settlement through the facilities of DTC; and 

(k) The Company shall have furnished or caused to be furnished to you at such Time of Delivery certificates of officers of the
Company reasonably satisfactory to you as to the accuracy of the representations and warranties of the Company herein at and as of such Time of Delivery, as to the performance by the Company of all of its obligations hereunder to be performed at or
prior to such Time of Delivery, as to the matters set forth in subsection (d) of this Section and as to such other matters as you may reasonably request. The officer(s) signing and furnishing such certificate(s) may rely on his or her knowledge
as to proceedings threatened. 
 9. (a) The Company will indemnify and hold harmless each Purchaser against any losses, claims, damages or
liabilities, joint or several, to which such Purchaser may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or
alleged untrue statement of a material fact contained in any Preliminary Offering Memorandum, the Pricing Memorandum, the Pricing Disclosure Package, the Offering Memorandum, or any amendment or supplement thereto, any Company Supplemental
Disclosure Document, any Permitted General Solicitation Material or arise out of or are based upon the omission or alleged omission to state therein a material fact necessary to make the statements therein not misleading, and will reimburse each
Purchaser for any legal or other expenses reasonably incurred by such Purchaser in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that the Company shall not be liable in any such
case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in any Preliminary Offering Memorandum, the Pricing Memorandum, the
Pricing Disclosure Package, the Offering Memorandum or any amendment or supplement thereto, any Company Supplemental Disclosure Document or any Permitted General Solicitation Material, in reliance upon and in conformity with written information
furnished to the Company by any Purchaser through the Representatives expressly for use therein. 
 (b) Each Purchaser,
severally and not jointly, will indemnify and hold harmless the Company against any losses, claims, damages or liabilities to which the Company may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities
(or actions in respect thereof) arise out of or are based upon an 

  
 17 

 
untrue statement or alleged untrue statement of a material fact contained in any Preliminary Offering Memorandum, the Pricing Memorandum, the Pricing Disclosure Package, the Offering Memorandum,
or any amendment or supplement thereto, or any Company Supplemental Disclosure Document, any Permitted General Solicitation Material or arise out of or are based upon the omission or alleged omission to state therein a material fact necessary to
make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in any Preliminary Offering Memorandum, the Pricing
Memorandum, the Pricing Disclosure Package, the Offering Memorandum or any such amendment or supplement, any Company Supplemental Disclosure Document or any Permitted General Solicitation Material, in reliance upon and in conformity with written
information furnished to the Company by such Purchaser through the Representatives expressly for use therein; and each Purchaser will reimburse the Company for any legal or other expenses reasonably incurred by the Company in connection with
investigating or defending any such action or claim as such expenses are incurred. 
 (c) Promptly after receipt by an
indemnified party under subsection (a) or (b) above of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under such subsection, notify the
indemnifying party in writing of the commencement thereof; but the omission so to notify the indemnifying party shall not relieve it from any liability which it may have to any indemnified party otherwise than under such subsection unless and to the
extent it has been materially prejudiced through the forfeiture by the indemnifying party of substantial rights and defenses. In case any such action shall be brought against any indemnified party and it shall notify the indemnifying party of the
commencement thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably
satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and, after notice from the indemnifying party to such indemnified party of its election so to assume the
defense thereof, the indemnifying party shall not be liable to such indemnified party under such subsection for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection
with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect
to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement,
compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to, or an admission of, fault, culpability or a failure
to act, by or on behalf of any indemnified party. 
 (d) If the indemnification provided for in this Section 9 is
unavailable to or insufficient to hold harmless an indemnified party under subsection (a) or (b) above in respect of any losses, claims, damages or liabilities (or actions in respect thereof) referred to therein, then each indemnifying
party shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (or actions in respect thereof) in such proportion as is appropriate to reflect the relative benefits received
by the Company on the one hand and the Purchasers on the 

  
 18 

 
other from the offering of the Securities. If, however, the allocation provided by the immediately preceding sentence is not permitted by applicable law or if the indemnified party failed to give
the notice required under subsection (c) above, then each indemnifying party shall contribute to such amount paid or payable by such indemnified party in such proportion as is appropriate to reflect not only such relative benefits but also the
relative fault of the Company on the one hand and the Purchasers on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities (or actions in respect thereof), as well as any other relevant
equitable considerations. The relative benefits received by the Company on the one hand and the Purchasers on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by
the Company bear to the total discounts and commissions received by the Purchasers, in each case as set forth in the Offering Memorandum. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged
untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company on the one hand or the Purchasers on the other and the parties’ relative intent, knowledge, access
to information and opportunity to correct or prevent such statement or omission. The Company and the Purchasers agree that it would not be just and equitable if contribution pursuant to this subsection (d) were determined by pro rata allocation
(even if the Purchasers were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this subsection (d). The amount paid or payable by an
indemnified party as a result of the losses, claims, damages or liabilities (or actions in respect thereof) referred to above in this subsection (d) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified
party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this subsection (d), no Purchaser shall be required to contribute any amount in excess of the amount by which the total price at which
the Securities purchased by it pursuant to this Agreement and distributed to investors were offered to investors exceeds the amount of any damages which such Purchaser has otherwise been required to pay by reason of such untrue or alleged untrue
statement or omission or alleged omission. The Purchasers’ obligations in this subsection (d) to contribute are several in proportion to their respective purchase obligations and not joint. 

(e) The obligations of the Company under this Section 9 shall be in addition to any liability which the Company may
otherwise have and shall extend, upon the same terms and conditions, to each officer and director of each Purchaser and each person, if any, who controls any Purchaser within the meaning of the Act and each broker-dealer affiliate of each Purchaser;
and the obligations of the Purchasers under this Section 9 shall be in addition to any liability which the respective Purchasers may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the
Company and to each person, if any, who controls the Company within the meaning of the Act. 
 10. (a) If any Purchaser shall default in its
obligation to purchase the Securities which it has agreed to purchase hereunder, the Representatives may in their discretion arrange for you or another party or other parties to purchase such Securities on the terms contained herein at the
applicable Time of Delivery. If within thirty-six hours after such default by any Purchaser the Representatives do not arrange for the purchase of such Securities, then the Company shall be entitled to a further period of thirty-six hours within
which to procure another party or other parties reasonably satisfactory to the Representatives to purchase such Securities on such terms. In the event that, within the respective prescribed periods, the Representatives notify the

  
 19 

 
Company that you have so arranged for the purchase of such Securities, or the Company notifies the Representatives that it has so arranged for the purchase of such Securities, the Representatives
or the Company shall have the right to postpone such Time of Delivery for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary in the Offering Memorandum, or in any other documents or arrangements,
and the Company agrees to prepare promptly any amendments or supplements to the Offering Memorandum which in the opinion of the Representatives may thereby be made necessary. The term “Purchaser” as used in this Agreement shall include any
person substituted under this Section with like effect as if such person had originally been a party to this Agreement with respect to such Securities. 

(b) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Purchaser or Purchasers by
the Representatives and the Company as provided in subsection (a) above, the aggregate principal amount of such Securities which remains unpurchased does not exceed one-eleventh of the aggregate principal amount of all the Securities to be
purchased at such Time of Delivery, then the Company shall have the right to require each non-defaulting Purchaser to purchase the principal amount of Securities which such Purchaser agreed to purchase hereunder at such Time of Delivery and, in
addition, to require each non-defaulting Purchaser to purchase its pro rata share (based on the principal amount of Securities which such Purchaser agreed to purchase hereunder) of the Securities of such defaulting Purchaser or Purchasers for which
such arrangements have not been made; but nothing herein shall relieve a defaulting Purchaser from liability for its default. 

(c) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Purchaser or Purchasers by
the Representatives and the Company as provided in subsection (a) above, the aggregate principal amount of Securities which remains unpurchased exceeds one-eleventh of the aggregate principal amount of all the Securities to be purchased at such
Time of Delivery, or if the Company shall not exercise the right described in subsection (b) above to require non-defaulting Purchasers to purchase Securities of a defaulting Purchaser or Purchasers, then this Agreement (or, with respect to a
Subsequent Time of Delivery, the obligation of the Purchasers to purchase and of the Company to sell the Optional Securities) shall thereupon terminate, without liability on the part of any non-defaulting Purchaser or the Company, except for the
expenses to be borne by the Company and the Purchasers as provided in Section 7 hereof and the indemnity and contribution agreements in Section 9 hereof; but nothing herein shall relieve a defaulting Purchaser from liability for its
default. 
 11. The respective indemnities, agreements, representations, warranties and other statements of the Company and the several
Purchasers, as set forth in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation (or any statement as to the results thereof) made by or on
behalf of any Purchaser or any controlling person of any Purchaser, or the Company, or any officer or director or controlling person of the Company, and shall survive delivery of and payment for the Securities. 

12. If this Agreement shall be terminated pursuant to Section 10 hereof, the Company shall not then be under any liability to any
Purchaser except as provided in Sections 7 and 9 hereof; but, if for any other reason (other than those set forth in clauses (i), (iii), (iv) or (v) of Section 8(e)), the Securities are not delivered by or on behalf of the Company as
provided herein, the Company will reimburse the Purchasers through you for all documented out-of-pocket expenses approved in writing by the Representatives, including fees and disbursements of counsel, reasonably incurred by the Purchasers in making
preparations for the purchase, sale and delivery of the Securities, but the Company shall then be under no further liability to any Purchaser except as provided in Sections 7 and 9 hereof. 

  
 20 

 13. In all dealings hereunder, the Representatives shall act on behalf of each of the Purchasers,
and the parties hereto shall be entitled to act and rely upon any statement, request, notice or agreement on behalf of any Purchaser made or given by the Representatives. 

All statements, requests, notices and agreements hereunder shall be in writing, and if to the Purchasers shall be delivered or sent by mail or
facsimile transmission to you as the representative at Goldman, Sachs & Co., 200 West Street, New York, New York 10282-2198, Attention: Registration Department; and Morgan Stanley & Co. LLC, 1585 Broadway, New York, New York 10036,
Attention: Convertible Debt Syndicate Desk, with a copy to the Legal Department; and if to the Company shall be delivered or sent by mail or facsimile transmission to the address of the Company set forth in the Offering Memorandum, Attention:
General Counsel; and if to any stockholder that has delivered a lock-up letter described in Section 8(g) hereof shall be delivered or sent by mail to his, her or its respective address provided in Section III hereto or such other address as
such stockholder provides in writing to the Company; provided, however, that any notice to a Purchaser pursuant to Section 9 hereof shall be delivered or sent by mail or facsimile transmission to such Purchaser at its address set forth in its
Purchasers’ Questionnaire, which address will be supplied to the Company by you upon request. Any such statements, requests, notices or agreements shall take effect upon receipt thereof. 

In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the
Purchasers are required to obtain, verify and record information that identifies their respective clients, including the Company, which information may include the name and address of their respective clients, as well as other information that will
allow the Purchasers to properly identify their respective clients. 
 14. This Agreement shall be binding upon, and inure solely to the
benefit of, the Purchasers, the Company and, to the extent provided in Sections 9 and 11 hereof, the officers and directors of the Company and each person who controls the Company or any Purchaser, and their respective heirs, executors,
administrators, successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No purchaser of any of the Securities from any Purchaser shall be deemed a successor or assign by reason merely of such
purchase. 
 15. Time shall be of the essence of this Agreement. 

16. The Company acknowledges and agrees that (i) the purchase and sale of the Securities pursuant to this Agreement is an
arm’s-length commercial transaction between the Company, on the one hand, and the several Purchasers, on the other, (ii) in connection therewith and with the process leading to such transaction each Purchaser is acting solely as a
principal and not the agent or fiduciary of the Company, (iii) no Purchaser has assumed an advisory or fiduciary responsibility in favor of the Company with respect to the offering contemplated hereby or the process leading thereto
(irrespective of whether such Purchaser has advised or is currently advising the Company on other matters) or any other obligation to the Company except the obligations expressly set forth in this Agreement and (iv) the Company has consulted
its own legal and financial advisors to the extent it deemed appropriate. The Company agrees that it will not claim that the Purchasers, or any of them, has rendered advisory services of any nature or respect, or owes a fiduciary or similar duty to
the Company, in connection with such transaction or the process leading thereto. 

  
 21 

 17. This Agreement supersedes all prior agreements and understandings (whether written or oral)
between the Company and the Purchasers, or any of them, with respect to the subject matter hereof. 
 18. THIS AGREEMENT AND ANY MATTERS
RELATED TO THIS TRANSACTION SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD TO PRINCIPLES OF CONFLICT OF LAWS THAT WOULD RESULT IN THE APPLICATION OF ANY LAW OTHER THAN THE LAWS OF THE STATE OF
NEW YORK. The Company agrees that any suit or proceeding arising in respect of this agreement or our engagement will be tried exclusively in the U.S. District Court for the Southern District of New York or, if that court does not have subject matter
jurisdiction, in any state court located in the City and County of New York and the Company agrees to submit to the jurisdiction of, and to venue in, such courts. 

19. The Company and each Purchaser 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 Agreement or the transactions contemplated hereby. 
 20. This Agreement may
be executed by any one or more of the parties hereto in any number of counterparts, each of which shall be deemed to be an original, but all such respective counterparts shall together constitute one and the same instrument. 

21. Notwithstanding anything herein to the contrary, the Company (and the Company’s employees, representatives, and other agents) are
authorized to disclose to any and all persons, the tax treatment and tax structure of the potential transaction and all materials of any kind (including tax opinions and other tax analyses) provided to the Company relating to that treatment and
structure, without the Purchasers’ imposing any limitation of any kind. However, any information relating to the tax treatment and tax structure shall remain confidential (and the foregoing sentence shall not apply) to the extent necessary to
enable any person to comply with securities laws. For this purpose, “tax treatment” means U.S. federal and state income tax treatment, and “tax structure” is limited to any facts that may be relevant to that treatment. 

If the foregoing is in accordance with your understanding, please sign and return to us three counterparts hereof, and upon the acceptance
hereof by the Representatives, on behalf of each of the Purchasers, this letter and such acceptance hereof shall constitute a binding agreement among each of the Purchasers and the Company. It is understood that your acceptance of this letter on
behalf of each of the Purchasers is pursuant to the authority set forth in a form of Agreement among Purchasers, the form of which shall be submitted to the Company for examination upon request, but without warranty on your part as to the authority
of the signers thereof. 
 [Signature Page Follows] 

  
 22 

			
	Very truly yours,
	TWITTER, INC.
	By:	 	/s/ Anthony Noto
	Name:	 	Anthony Noto
	Title:	 	CFO

  

			
	Accepted as of the date hereof:
	Goldman, Sachs & Co.
	By:	 	/s/ Daniel Young
	Name:	 	Daniel Young
	Title:	 	Managing Director
	
	Morgan Stanley & Co. LLC
		
	By:	 	/s/ Lauren Cummings
	Name:	 	Lauren Cummings
	Title:	 	Executive Director

 On behalf of each of the Purchasers 

[Signature Page to Purchase Agreement] 

  
 23 

 SCHEDULE 1 
  

									
	 	  	Principal	 	  	Principal	 
	 	  	Amount of	 	  	Amount of	 
	 	  	2019 Notes	 	  	2021 Notes	 
	 	  	to be	 	  	to be	 
	 Purchaser
	  	Purchased	 	  	Purchased	 
	 Goldman, Sachs & Co.
	  	$	396,000,000	  	  	$	396,000,000	  
	 Morgan Stanley & Co. LLC
	  	 	324,000,000	  	  	 	324,000,000	  
	 J.P. Morgan Securities LLC
	  	 	108,000,000	  	  	 	108,000,000	  
	 Merrill Lynch, Pierce, Fenner & Smith

                   
  Incorporated
	  	 	30,000,000	  	  	 	30,000,000	  
	 Deutsche Bank Securities Inc.
	  	 	30,000,000	  	  	 	30,000,000	  
	 Allen & Company LLC
	  	 	12,000,000	  	  	 	12,000,000	  
	 Total
	  	$	900,000,000	  	  	$	900,000,000	  
		  	  
	  
	 	  	  
	  
	 

  
 24 

 SCHEDULE II 
  

	(a)	Additional Documents Incorporated by Reference: 

 None. 

 

	(b)	Company Supplemental Disclosure Documents: 

 Term Sheet setting forth the final terms of the
Securities, substantially in the form attached hereto as Schedule III. 
  

	(c)	Purchaser Supplemental Disclosure Documents: 

 None. 

 

	(d)	Permitted General Solicitation Materials: 

 None 

  
 25 

 SCHEDULE III 

[Term Sheet] 

  
 26 

 ANNEX A 

[Form of Opinion and Negative Assurance Letter of 

Davis Polk & Wardwell LLP] 

Separately Circulated 

 ANNEX B 

[Form of Opinion and Negative Assurance Letter of 

Wilson Sonsini Goodrich & Rosati, Professional Corporation] 

Separately Circulated 

 ANNEX C 

[Form of Comfort Letter and Form of Bring-Down Comfort Letter 

of PricewaterhouseCoopers LLP.] 

Separately Circulated 

 ANNEX D 

[Form of Lock-Up] 

 ANNEX E 

[Form of Chief Financial Officer’s Certificate]

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