EX-4.1





 Exhibit 4.1 

EXECUTION VERSION 
  

 
  

TWITTER, INC. 
 AND 

U.S. BANK NATIONAL ASSOCIATION, 

as Trustee 
 INDENTURE 

Dated as of March 4, 2021 

0% Convertible Senior Notes due 2026 
  

 
  












 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
	  	 	13	 
	 Section 2.03 . Date and Denomination of Notes; No Regular Interest; Special 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
	  	 	22	 
	 Section 2.07 . Temporary Notes
	  	 	23	 
	 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
	  	 	24	 
	
	ARTICLE 4	  

	PARTICULAR COVENANTS OF THE COMPANY	  

		
	 Section 4.01 . Payment of Principal and Special Interest
	  	 	25	 
	 Section 4.02 . Maintenance of Office or Agency
	  	 	25	 
	 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
	  	 	27	 
	 Section 4.06 . Rule 144A Information Requirement and Annual Reports
	  	 	27	 
	 Section 4.07 . Stay, Extension and Usury Laws
	  	 	29	 
	 Section 4.08 . Compliance Certificate; Statements as to Defaults
	  	 	29	 
	 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
	  	 	30	 
	
	ARTICLE 6	  

	DEFAULTS AND REMEDIES	  

		
	 Section 6.01 . Events of Default
	  	 	30	 
	 Section 6.02 . Acceleration; Rescission and Annulment
	  	 	31	 
	 Section 6.03 . Special Interest
	  	 	32	 
	 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
	  	 	35	 
	 Section 6.07 . Proceedings by Trustee
	  	 	36	 
	 Section 6.08 . Remedies Cumulative and Continuing
	  	 	36	 
	 Section 6.09 . Direction of Proceedings and Waiver of Defaults by Majority of
Holders
	  	 	36	 
	 Section 6.10 . Notice of Defaults
	  	 	37	 
	 Section 6.11 . Undertaking to Pay Costs
	  	 	37	 
	
	ARTICLE 7	  

	CONCERNING THE TRUSTEE	  

		
	 Section 7.01 . Duties and Responsibilities of Trustee
	  	 	38	 
	 Section 7.02 . Reliance on Documents, Opinions, Etc.
	  	 	39	 
	 Section 7.03 . No Responsibility for Recitals, Etc.
	  	 	41	 
	 Section 7.04 . Trustee, Paying Agents, Conversion Agents, Bid Solicitation Agent or Note
Registrar May Own Notes
	  	 	41	 
	 Section 7.05 . Monies and Shares of Common Stock to Be Held in Trust
	  	 	41	 
	 Section 7.06 . Compensation and Expenses of Trustee
	  	 	41	 
	 Section 7.07 . Officer’s Certificate as Evidence
	  	 	42	 
	 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.
	  	 	44	 
	 Section 7.12 . Trustee’s Application for Instructions from the Company
	  	 	44	 
	
	ARTICLE 8	  

	CONCERNING THE HOLDERS	  

		
	 Section 8.01 . Action by Holders
	  	 	45	 
	 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
	  	 	46	 
	 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
	  	 	47	 
	 Section 9.03 . Call of Meetings by Company or Holders
	  	 	47	 
	 Section 9.04 . Qualifications for Voting
	  	 	47	 
	 Section 9.05 . Regulations
	  	 	48	 
	 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
	  	 	49	 
	 Section 10.02 . Supplemental Indentures with Consent of Holders
	  	 	50	 
	 Section 10.03 . Effect of Supplemental Indentures
	  	 	51	 
	 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
	  	 	52	 
	 Section 11.03 . Officer’s Certification and Opinion of Counsel to Be Given to
Trustee
	  	 	53	 
	
	ARTICLE 12	  

	IMMUNITY OF INCORPORATORS, STOCKHOLDERS, OFFICERS AND DIRECTORS	
 


		
	 Section 12.01 . Indenture and Notes Solely Corporate Obligations
	  	 	53	 
	
	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
	  	 	72	 
	 Section 13.06 . Shares to Be Fully Paid
	  	 	72	 
	 Section 13.07 . Effect of Recapitalizations, Reclassifications and Changes of the Common
Stock.
	  	 	72	 
	 Section 13.08 . Certain Covenants
	  	 	74	 
	 Section 13.09 . Responsibility of Trustee
	  	 	74	 


  
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	 Section 13.10 . Notice to Holders Prior to Certain Actions
	  	 	75	 
	 Section 13.11 . Stockholder Rights Plans
	  	 	75	 
	 Section 13.12 . Exchange in Lieu of Conversion
	  	 	76	 
	
	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
	  	 	81	 
	
	ARTICLE 16	  

	MISCELLANEOUS PROVISIONS	  

		
	 Section 16.01 . Provisions Binding on Company’s Successors
	  	 	81	 
	 Section 16.02 . Official Acts by Successor Corporation
	  	 	81	 
	 Section 16.03 . Addresses for Notices, Etc.
	  	 	81	 
	 Section 16.04 . Governing Law; Jurisdiction
	  	 	82	 
	 Section 16.05 . Evidence of Compliance with Conditions Precedent; Certificates and
Opinions of Counsel to Trustee
	  	 	82	 
	 Section 16.06 . Legal Holidays
	  	 	83	 
	 Section 16.07 . No Security Interest Created
	  	 	83	 
	 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
	  	 	85	 
	 Section 16.13 . Waiver of Jury Trial
	  	 	85	 
	 Section 16.14 . Calculations
	  	 	85	 
	 Section 16.15 . Force Majeure
	  	 	85	 
	 Section 16.16 . U.S.A. Patriot Act
	  	 	86	 

 EXHIBIT 
  

							
	 Exhibit A
	 	Form of Note	  	 	A-1	 


  
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 INDENTURE, dated as of March 4, 2021 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 0% Convertible Senior Notes due 2026 (the “Notes”), initially in an aggregate principal amount not to exceed $1,250,000,000 (as increased by an
amount of up to $187,500,000 principal amount of any additional Notes purchased by the 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 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 Company 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. 

  
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 “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: B. Scarbrough (Twitter, Inc. 0% Convertible Senior
Notes due 2026), 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. 

“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 

  
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 (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 Special 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 13.12. 

“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. 
 “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. 

  
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 “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 (other than a transaction or event described in clause (B) below); (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); 

  
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 (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
(without giving effect to subclause (i) of the proviso in clause (b)) shall be deemed a Fundamental Change solely under clause (b) above (subject to the proviso in clause (b); 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). 

  
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 “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. 
 “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 March 15, 2026. 

“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). 

“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). 

  
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 “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 December 15, 2025, 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 December 15, 2025, the 30 consecutive Trading Days beginning on, and including, the 31st Scheduled Trading Day immediately preceding the Maturity Date. 

“Offering Memorandum” means the preliminary offering memorandum dated March 1, 2021, as supplemented by the related
pricing term sheet dated March 1, 2021, 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; 
 (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); 

  
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 (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 and delivered to the Trustee for
cancellation in accordance with the ultimate sentence of Section 2.10, subject to Section 8.04. 
 “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 as of March 1, 2021, among the Company and the Purchasers. 
 “Purchasers” shall have the meaning
specified in the Purchase Agreement. 
 “Reference Property” shall have the meaning specified in Section 13.07(a).

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

“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. 

  
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 “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 Section 6.01(g) and (h), 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 (or any successor rule);
provided that, in the case of a Subsidiary of the Company that meets the criteria of clause (1)(iii) of the definition thereof but not clause (1)(i) or (1)(ii) thereof, in each case as such rule is in effect on the date hereof, such
Subsidiary shall not be deemed to be a “Significant Subsidiary” unless the Subsidiary’s income or loss from continuing operations before income taxes if and to the extent paragraph (w)(1)(iii)(A)(2) does not apply to the determination
of whether the income test in paragraph (w)(1)(iii) is met (after intercompany eliminations), for the last completed fiscal year prior to the date of such determination exceeds $100.0 million. For the avoidance of doubt, or purposes of this
definition, to the extent any such Subsidiary would not be deemed to be a “significant subsidiary” under the relevant definition set forth in Rule 1-02(w) of Regulation
S-X (or any successor rule) as in effect on the relevant date of determination, such Subsidiary shall not be deemed to be a “Significant Subsidiary” under this Indenture irrespective of whether such
Subsidiary would otherwise be deemed to be a “significant subsidiary” after giving effect to the proviso in the immediately preceding sentence. 

“Special Interest” means all amounts, if any, payable pursuant to Section 4.06(d), Section 4.06(e) and
Section 6.03, as applicable. 
 “Special Interest Payment Date” means, if and to the extent that Special Interest is
payable on the Notes, each March 15 and September 15 of each year, beginning on September 15, 2021. 
 “Special
Interest Record Date” with respect to any Special 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
Special Interest Payment Date, respectively. 

  
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 “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). 

“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. 

  
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 “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. 
 “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 “more than 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, all references to interest on, or in respect of, any
Note in this Indenture shall be deemed to refer solely to Special Interest if, in such context, Special Interest is, was or would be payable pursuant to any of Section 4.06(d), Section 4.06(e) and Section 6.03, or to any such interest
payable on any Defaulted Amounts as set forth in Section 2.03(c). 
 ARTICLE 2 

ISSUE, DESCRIPTION, EXECUTION, REGISTRATION AND
EXCHANGE OF NOTES 
 Section 2.01. Designation and Amount. The Notes shall be
designated as the “0% Convertible Senior Notes due 2026.” The aggregate principal amount of Notes that may be authenticated and delivered under this Indenture is initially limited to $1,250,000,000 (as increased by an amount of up to
$187,500,000 aggregate principal amount of any additional Notes purchased by the 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 to the extent expressly permitted hereunder. 

  
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 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. 

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 any
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; No Regular Interest; Special 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 not bear regular interest, and the principal amount of
the Notes will not accrete. Special Interest on the Notes, if any, 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. 

  
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 (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 Special Interest Record Date with respect to any Special Interest Payment Date shall be entitled to receive any Special Interest payable on such Special Interest Payment Date. Special 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 Special Interest, if any, (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 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 Special Interest 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 and shall not accrue interest unless
Special Interest was payable with respect to such Defaulted Amounts on the relevant payment date, in which case such Defaulted Amounts shall accrue interest per annum at the then applicable Special Interest rate from, and including, such relevant
payment date, and such Defaulted Amounts together with any 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). 

  
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 (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. 

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, facsimile or other electronic 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. 

  
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 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. 

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. 

  
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 (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 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: 

  
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 (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 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) (i) as to
which such restrictions on transfer shall have expired in accordance with their terms, (ii) that has been transferred pursuant to a registration statement that has become effective or been declared effective under the Securities Act and that
continues to be effective at the time of such transfer or (iii) that has been sold pursuant to the exemption from registration provided by Rule 144 or any similar provision then in force under the Securities Act, 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 any of the conditions set forth in clause (i) through (iii)
of the immediately preceding sentence have been satisfied, 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. Any exchange pursuant to the foregoing paragraph shall be in accordance with applicable procedures to the Depositary.


  
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 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 exchange of a Global Note or a portion thereof for one or more Physical Notes in accordance with the second immediately
succeeding paragraph. 
 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. 
 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, or, in the case of clause (iii) of the
immediately preceding paragraph, the relevant beneficial owner, 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 of the Trustee. 

  
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 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 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 

  
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 (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 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 (i) as to which such restrictions on transfer shall have expired in accordance with their terms,
(ii) that 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 (iii) that has been sold pursuant to
the exemption from registration provided by Rule 144 or any similar provision then in force under the Securities Act, 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. 

  
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 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 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. 

  
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 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. 
 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 upon a Fundamental Change (and not withdrawn) in accordance with Article 14, 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 Special Interest, if any, 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 

  
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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 may, at its option and to the extent permitted by applicable law, reissue, resell, hold or surrender to the Trustee for cancellation any Notes that it or its Subsidiaries may repurchase (other than Notes repurchased
upon a Fundamental Change pursuant to Article 14, which shall be surrendered for cancellation in accordance with Section 2.08), in the case of a reissuance or resale, so long as such Notes do not constitute Restricted Securities upon such
reissuance or resale and are not required to bear the restrictive legend set forth in and in accordance with Section 2.05(c); provided that if any such reissued or resold Notes are not fungible for U.S. federal income tax or securities
law purposes with the Notes to be repurchased, such reissued or resold Notes shall have a separate CUSIP number or no CUSIP number. Any such Notes that the Company or its Subsidiaries may repurchase will be considered outstanding for all purposes
under this Indenture (other than, at any time when such Notes are held by the Company, any of its Subsidiaries or its Affiliates or any Subsidiary of any of such Affiliates, for the purpose of determining whether Holders of the requisite aggregate
principal amount of Notes have concurred in any direction, consent, waiver or other action under this Indenture, such Notes shall be disregarded as set forth in Section 8.04 ) unless and until such time as the Company surrenders such Notes to
the Trustee for cancellation and, upon receipt of a Company Order, the Trustee will cancel all Notes so surrendered 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
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. 

  
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 ARTICLE 4 

PARTICULAR COVENANTS OF THE COMPANY 

Section 4.01. Payment of Principal and Special 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 any accrued and unpaid Special 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. 
 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 any accrued and unpaid Special Interest on, the Notes in trust for the benefit of the Holders of the Notes; 

  
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 (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 any accrued and unpaid Special 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 any accrued and unpaid Special 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 any such
accrued and unpaid Special 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 any accrued and unpaid Special 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 such accrued and unpaid Special Interest, if any, 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 any accrued and unpaid Special 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 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, any accrued and unpaid Special 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), Special 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 

  
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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 remain 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(g) or (h), 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 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). 

  
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 (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 Special Interest on the Notes. Such Special 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 380th day after the last date of original issuance of the Notes, the Company shall pay Special 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). 

(f) Special Interest will be payable in arrears on each Special Interest Payment Date as set forth in Section 2.03(b). 

(g) The Special 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 Special 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 Special Interest accrue under the terms of this Indenture (aggregating any
Special Interest payable pursuant to Section 4.06(d) or Section 4.06(e) with any Special 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 Special Interest. The Trustee shall have no duty to verify the Company’s determination of whether Special Interest is due or the Company’s calculations as to the amount of Special Interest. 

  
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 (h) If Special 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 Special Interest that is payable and (ii) the date on which such Special 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 Special Interest is payable. If the Company has paid Special 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 any
Special 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, 2021) 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. 

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, (i) if and at all such times when Special Interest is payable on the Notes pursuant to this Indenture semi-annually, not more than 15 days after each March 1 and September 1 in each year beginning with
September 1, 2021, and (ii) 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. 

  
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 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 Special 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; 
 (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) 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 

  
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 (h) 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(g) or Section 6.01(h) 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 any accrued and unpaid Special Interest on, all the 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(g) or Section 6.01(h) with respect to the Company occurs
and is continuing, 100% of the principal of, and accrued and unpaid Special 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 any accrued and unpaid Special 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 any accrued and unpaid Special
Interest, and on such principal at the then applicable Special Interest rate only and to the extent any Special Interest is payable 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 Special 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 

  
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shall extend to or shall affect any Default or Event of Default resulting from (i) the nonpayment of the principal of, or any accrued and unpaid Special 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. Special 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 Special 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). Special Interest payable pursuant to this Section 6.03 shall be in addition to, not in lieu of, any Special Interest payable pursuant to
Section 4.06(d) or Section 4.06(e). If the Company so elects, such Special Interest shall be payable as set forth in Section 2.03(b). 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 Special 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 Special Interest when due, the Notes shall be immediately subject to acceleration
as provided in Section 6.02. 
 In order to elect to pay Special 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 Special Interest accrue under the terms of this Indenture (aggregating any Special Interest payable pursuant to this
Section 6.03 with any Special 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
Special 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 Special
Interest, if any, with no interest accruing on any overdue principal unless Special Interest was payable on the required payment date, in which case such payments will accrue interest at the then applicable Special Interest rate from such required
payment date, and, in addition thereto, such further amount as 

  
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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 Special Interest, if any, in
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. 

  
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 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. 
 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 any 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 any interest is payable on such Notes and has been collected by the Trustee) payable upon such overdue amounts at the rate of Special Interest then payable on such Notes, if any, 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 (to
the extent that any interest is payable on such Notes and has been collected by the Trustee) on the overdue principal to the extent that such interest has been collected by the Trustee, payable upon such overdue amounts at the rate of Special
Interest then payable on such Notes, if any, 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


  
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Change Repurchase Price and the cash due upon conversion) and any interest without preference or priority of principal over such interest, or of any 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 any 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 any 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; 

(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. 

  
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 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 Special 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 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 Special 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 

  
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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 any accrued and unpaid Special 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
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 Special 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. 

  
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 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 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; 

  
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 (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. 

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; 

  
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 (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; 
 (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. 

  
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 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. 
 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


  
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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(g) or Section 6.01(h) 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 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


  
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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 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 

  
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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 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 

  
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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. 

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) any accrued and unpaid Special
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. 

  
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 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 Affiliate of 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 an Affiliate of 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 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; 

  
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 (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 delivered 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. 

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. 

  
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 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. 
 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 delivered 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. 

  
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 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; 

(d) to secure the Notes; 
 (e) to
add to the covenants or Events of Default 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. 

  
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 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; 

(b) reduce the rate of or extend the stated time for payment of any Special 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 Special Interest, if any, 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. 

  
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 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 deliver 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. 
 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: 

  
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 (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 any 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 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. 

  
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 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 any 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 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 December 15, 2025 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 December 15, 2025 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 7.6905 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 December 15, 2025, 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 

  
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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 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 (unless the Company
is acting as such) 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 December 15, 2025, 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 

  
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 (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 (unless the Company is acting as such) 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. 

(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 December 15, 2025, 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 December 15, 2025, 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) no
later than the actual effective date of such transaction or event. None of the Trustee, the Bid Solicitation Agent (unless the Company is acting as such) 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. 

  
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 (iv) Prior to the close of business on the Business Day immediately
preceding December 15, 2025, 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 June 30, 2021 (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 June 30, 2021 whether the Notes may be surrendered for conversion in
accordance with this clause (iv) and shall notify the Holders, 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
(unless the Company is acting as such) 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. 

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 December 15, 2025 shall be settled using the
same Settlement Method. 
 (ii) Except for any conversions for which the relevant Conversion Date occurs on or after
December 15, 2025, 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 shall deliver such Settlement Notice to converting Holders, the Trustee and the Conversion Agent (if other than the Trustee) 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 December 15, 2025, no later than the close of business on Scheduled Trading Day immediately preceding December 15, 2025). 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 

  
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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. 
 (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. 

  
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 (vi) At any time prior to December 15, 2025, 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 any Special Interest payable on the next Special 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 (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 any Special Interest payable on the next Special 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. Except as set forth in Section 13.03(b) and Section 13.07(a), the Company shall pay or deliver, as the case may be, the
consideration due in respect of the Conversion Obligation on the second Business Day immediately following the relevant Conversion Date, if the Company elects Physical Settlement (provided that if the relevant Conversion Date occurs on or
after December 15, 2025, such consideration shall be paid or delivered, as the case may be, on the Maturity Date), or on the second 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. 

  
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 (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. 
 (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 Special 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 Special Interest, if any, to, but excluding, the relevant
Conversion Date. As a result, accrued and unpaid Special 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, any accrued and unpaid Special 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
Special Interest Record Date and prior to the open of business on the corresponding Special Interest Payment Date, Holders of such Notes as of the close of business on such Special Interest Record Date will receive the full amount of Special
Interest payable on such Notes on the corresponding Special Interest Payment Date notwithstanding the conversion. Notes surrendered for conversion during the period from the close of business on any Special Interest Record Date to the open of
business on the immediately following Special Interest Payment Date must be accompanied by funds equal to the amount of any Special Interest 

  
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payable on the Notes so converted; provided that no such payment shall be required (1) for conversions following the Special Interest Record Date immediately preceding the Maturity
Date; (2) if the Company has specified a Fundamental Change Repurchase Date that is after a Special Interest Record Date and on or prior to the Business Day immediately following the corresponding Special 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 Special Interest Record Date immediately preceding the
Maturity Date or any Fundamental Change Repurchase Date (if and to the extent that Special Interest is payable on the Maturity Date or Fundamental Change Repurchase Date, as applicable) as described in the immediately preceding sentence shall
receive the full amount of any Special Interest due on the Maturity Date or Fundamental Change Repurchase Date, as applicable, regardless of whether their Notes have been converted following such Special Interest Record Date. 

(i) 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. 

(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 the Effective Date of a Make-Whole Fundamental Change occurs 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). 

  
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 (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 second 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 no later than five Business Days after such Effective Date. 

(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: 

  
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	 	  	Stock Price	 
	 Effective Date
	  	$	77.63	 	  	$	100.00	 	  	$	130.03	 	  	$	200.00	 	  	$	250.00	 	  	$	300.00	 	  	$	350.00	 	  	$	400.00	 	  	$	450.00	 	  	$	500.00	 	  	$	600.00	 	  	$	700.00	 
		  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 	  	  
	  
	 
	 March 4, 2021
	  	 	5.1911	 	  	 	3.3398	 	  	 	2.0079	 	  	 	0.7578	 	  	 	0.4180	 	  	 	0.2412	 	  	 	0.1422	 	  	 	0.0842	 	  	 	0.0490	 	  	 	0.0273	 	  	 	0.0064	 	  	 	0.0000	 
	 March 15, 2022
	  	 	5.1911	 	  	 	3.2184	 	  	 	1.8568	 	  	 	0.6355	 	  	 	0.3266	 	  	 	0.1748	 	  	 	0.0948	 	  	 	0.0507	 	  	 	0.0258	 	  	 	0.0117	 	  	 	0.0006	 	  	 	0.0000	 
	 March 15, 2023
	  	 	5.1911	 	  	 	3.0497	 	  	 	1.6591	 	  	 	0.4902	 	  	 	0.2254	 	  	 	0.1068	 	  	 	0.0501	 	  	 	0.0220	 	  	 	0.0082	 	  	 	0.0018	 	  	 	0.0000	 	  	 	0.0000	 
	 March 15, 2024
	  	 	5.1911	 	  	 	2.8383	 	  	 	1.4041	 	  	 	0.3217	 	  	 	0.1212	 	  	 	0.0454	 	  	 	0.0154	 	  	 	0.0038	 	  	 	0.0002	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 
	 March 15, 2025
	  	 	5.1911	 	  	 	2.5703	 	  	 	1.0406	 	  	 	0.1319	 	  	 	0.0305	 	  	 	0.0054	 	  	 	0.0001	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 	  	 	0.0000	 
	 March 15, 2026
	  	 	5.1911	 	  	 	2.3095	 	  	 	0.0000	 	  	 	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; 
 (ii) if
the Stock Price is greater than $700.00 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 $77.63 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 12.8816 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. 

  
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 (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
			
	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: 

 
 



 

  
 63 













 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.

 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 

  
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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
			
	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 

  
 65 













 
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.

 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 

  
 66 













 
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. 

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). 

  
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 (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.

 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, 

  
 68 














					
	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
			
	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. 

  
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 (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 (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; 

  
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 (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 Special 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 the anniversary of the initial issuance date of the Notes; 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. 

(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. 

  
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 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), 
 (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(j) 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 

  
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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 the weighted average of 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 second 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. 

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. 

  
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 (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. 
 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 

  
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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 (other than any Merger Event pursuant to which notice is provided pursuant to Section 14.02); or

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

  
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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. 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 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 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 Business Day following the relevant Conversion Date, notify the Holder surrendering Notes for conversion,
the Trustee and the Conversion Agent (if other than the Trustee) 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 13.12
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 any accrued and unpaid Special Interest thereon to, but excluding, the Fundamental Change Repurchase Date (the 

  
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“Fundamental Change Repurchase Price”), unless the Fundamental Change Repurchase Date falls after a Special Interest Record Date but on or prior to the Special Interest Payment
Date to which such Special Interest Record Date relates, in which case the Company shall instead pay the full amount of any accrued and unpaid Special Interest to Holders of record as of such Special Interest 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 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. 

  
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 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. Each Fundamental Change Company Notice shall specify: 

(i) the events causing the Fundamental Change; 

(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. 

  
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 (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. 

(e) The Company shall not be required to repurchase, or make an offer to repurchase Notes upon the occurrence of a Fundamental Change otherwise
required under this Section 14.02 if a third party makes an offer to purchase Notes in a manner, at the times and otherwise in compliance with the requirements set forth in this Indenture applicable to such an offer by the Company and such
third party purchases all Notes properly tendered and not validly withdrawn under such offer to purchase. 
 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 

  
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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 provisions of this Indenture, (i) such Notes will cease to be outstanding, (ii) Special Interest, if
and to the extent that any such accrued and unpaid Special Interest exists as of such date 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 Special
Interest Record Date but on or prior to the Special Interest Payment Date to which such Special Interest Record Date relates, the right of the Holder of record on such Special Interest Record Date to receive any related accrued and unpaid Special
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.


  
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 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. 
 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 (in any capacity hereunder) 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 or deliver 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 or delivered, as the case may be, 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. 

  
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 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. 
 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. 

  
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 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 Special 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 Special Interest, if and to the
extent any such Special Interest is otherwise payable on such date 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. 
 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. 

  
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 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 in accordance with this Indenture. 
 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. 

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 signatory 

Section 16.11. Execution in Counterparts. The parties may sign multiple counterparts of this Indenture. Each signed counterpart
shall be deemed an original, but all of them together represent the same agreement. Delivery of an executed counterpart by facsimile, PDF or other electronic means shall be effective as delivery of a manually executed counterpart thereof. Unless
otherwise provided in this Indenture or in any Note, the words “execute,” “execution,” “signed” and “signature” and words of similar import used in or related to any document to be signed in connection with
this Indenture, any Note or any of the transactions contemplated hereby (including amendments, waivers, consents and other modifications) shall be deemed to include electronic signatures and the keeping of records in electronic form, each of which
shall be of the same legal effect, validity or enforceability as a manually executed signature in ink or the use of a paper-based recordkeeping system, as applicable, to the fullest extent and as 

  
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provided for in any applicable law, including the Federal Electronic Signatures in Global and National Commerce Act, the New York State Electronic Signatures and Records Act and any other similar
state laws based on the Uniform Electronic Transactions Act; provided that, notwithstanding anything herein to the contrary, the Trustee is not under any obligation to agree to accept electronic signatures in any form or in any format unless
expressly agreed to by the Trustee pursuant to procedures approved by the Trustee. All notices, approvals, consents, requests and any communications hereunder must be in writing (provided that any such communication sent to Trustee hereunder must be
in the form of a document that is signed manually or by way of a digital signature provided by DocuSign or other electronic signature provider that the Company plans to use (or such other digital signature provider as specified in writing to Trustee
by the authorized representative), in English. The Company agrees to assume all risks arising out of the use of using digital signatures and electronic methods to submit communications to Trustee, including without limitation the risk of Trustee
acting on unauthorized instructions, and the risk of interception and misuse by third parties. 
 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. 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 (for purposes of Section 13.01(b)(i)), the Daily VWAPs, the Daily Conversion Values, the Daily Settlement
Amounts, any accrued Special Interest payable on the Notes and the Conversion Rate of the Notes. The Company shall make all these 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 16.15. 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. 

  
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 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] 

  
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 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/ Ned Segal

		 	Name: Ned Segal
		 	Title: Chief Financial Officer
	
	 U.S. BANK NATIONAL

    ASSOCIATION, as Trustee

		
	By:	 	 /s/ Bradley Scarbrough

		 	Name: Bradley Scarbrough
		 	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. 

0% Convertible Senior Note due 2026 
  

			
	No. RA-[_]	  	Initially $[●]

 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 $1,250,000,000 in
aggregate at any time (as increased by an amount of up to $187,500,000 aggregate principal amount of any additional Notes purchased by the 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 March 15, 2026, and interest, if any, thereon as set forth below. 

This Note shall bear no regular cash interest, and the principal amount of this Note shall not accrete. Any 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. Any Special Interest is payable semi-annually in arrears on each March 15 and September 15, commencing on September 15, 2021 (if Special Interest is then payable), 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. Any Special 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 refer solely to Special Interest if, in such context, Special Interest is, was or would be payable pursuant
to any of such Section 4.06(d), Section 4.06(e) or Section 6.03 or any interest on any Defaulted Amounts payable as set forth in Section 2.03(c) in the within-mentioned Indenture. 

Any Defaulted Amounts shall not accrue interest unless Special Interest was payable on the required payment date, in which case such payments
shall accrue interest per annum at the then applicable Special Interest rate, from, and including, such 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, if any, 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. 
 0% Convertible
Senior Note due 2026 
 This Note is one of a duly authorized issue of Notes of the Company, designated as its 0% Convertible Senior Notes
due 2026 (the “Notes”), initially limited to the aggregate principal amount of $1,250,000,000 (as increased by an amount of up to $187,500,000 aggregate principal amount of any additional Notes purchased by the 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 March 4, 2021 (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 any Special
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, any 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. 
 0% Convertible
Senior Notes due 2026 
 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: B. Scarbrough (Twitter 0% Convertible Senior Notes due 2026) 

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, if any,
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: B. Scarbrough (Twitter
0% Convertible Senior Notes due 2026) 
 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 Special Interest Record Date and on or prior to the corresponding Special Interest Payment Date, accrued and unpaid Special Interest, if any, thereon to, but excluding, such
Fundamental Change Repurchase Date. Capitalized terms used herein but not defined shall have the meanings ascribed to such terms in the Indenture. 

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 
 633 West Fifth Street, 24th Floor 

Los Angeles, California 90071 
 Attention: B. Scarbrough (Twitter
0% Convertible Senior Notes due 2026) 
 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. 

  
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	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 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. 

  
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