Exhibit 4.1

ENTERPRISE FINANCIAL SERVICES CORP

TO

U.S. Bank National Association,

Trustee

Indenture

SUBORDINATED DEBT SECURITIES

Dated as of November 1, 2016

Table of Contents

ENTERPRISE FINANCIAL SERVICES CORP

TO

U.S. Bank National Association,

as Trustee

Reconciliation and tie between Trust Indenture Act of 1939

and Indenture, dated as of November 1, 2016

i

ii

INDENTURE , dated as of November 1, 2016 between ENTERPRISE FINANCIAL SERVICES CORP , a Delaware corporation (herein called the “Company”), and U.S. Bank National Association, a national banking association, having its principal corporate trust office at Philadelphia, Pennsylvania, as Trustee (herein called the “Trustee”).

RECITAL OF THE COMPANY

The Company has duly authorized the execution and delivery of this Indenture to provide for the issuance from time to time of its unsecured subordinated debentures, notes or other evidences of indebtedness (herein called the “Securities”) in an unlimited aggregate principal amount, to be issued from time to time in one or more series as contemplated herein; and all acts necessary to make this Indenture a valid agreement of the Company, in accordance with its terms, have been performed.

For all purposes of this Indenture, except as otherwise expressly provided or unless the context otherwise requires, capitalized terms used herein shall have the meanings assigned to them in Article One of this Indenture.

NOW, THEREFORE, THIS INDENTURE WITNESSETH:

For and in consideration of the premises and the purchase of the Securities by the Holders thereof, it is mutually covenanted and agreed, for the equal and proportionate benefit of all Holders of the Securities or of any series thereof, as follows:

ARTICLE 1

Definitions and Other Provisions of General Application

Section 101. Definitions

For all purposes of this Indenture, except as otherwise expressly provided or unless the context otherwise requires:

(a) the terms defined in this Article have the meanings assigned to them in this Article and include the plural as well as the singular;

(b) all terms used herein without definition which are defined in the Trust Indenture Act, either directly or by reference therein, have the meanings assigned to them therein;

(c) all accounting terms not otherwise defined herein have the meanings assigned to them in accordance with generally accepted accounting principles, and, except as otherwise herein expressly provided, the term “generally accepted accounting principles” with respect to any computation required or permitted hereunder shall mean such accounting principles as are generally accepted at the date of such computation or, at the election of the Company from time to time, at the date of the execution and delivery of this Indenture;

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(d) any reference to an “Article” or a “Section” refers to an Article or a Section, as the case may be, of this Indenture; and

(e) the words “herein”, “hereof” and “hereunder” and other words of similar import refer to this Indenture as a whole and not to any particular Article, Section or other subdivision.

Certain terms, used principally in Article Nine, are defined in that Article.

“Act,” when used with respect to any Holder of a Security, has the meaning specified in Section 104.

“Additional Amounts” means any additional amounts that may be payable with respect to Securities of one or more series or Tranches as may be provided pursuant to Section 301(y).

“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 the management and policies of such Person, directly or through one or more intermediaries, whether through the ownership of voting securities, by contract or otherwise; and the terms “controlling” and “controlled” have meanings correlative to the foregoing.

“Authenticating Agent” means any Person (other than the Company or an Affiliate of the Company) authorized by the Trustee pursuant to Section 915 to act on behalf of the Trustee to authenticate one or more series of Securities or Tranche thereof.

“Authorized Officer” means the Chairman of the Board, the President, any Vice President, the Treasurer, any Assistant Treasurer, any director or company secretary, any authorized attorney or any other officer or agent of the Company duly authorized by a Board Resolution to act on behalf of the Company in respect of matters relating to this Indenture.

“Board of Directors” means either the board of directors of the Company or any committee thereof duly authorized to act in respect of matters relating to this Indenture.

“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,” when used with respect to a Place of Payment or any other particular location specified in the Securities or this Indenture, means any day, other than a Saturday or Sunday, which is not a day on which banking institutions or trust companies in such Place of Payment or other location are generally authorized or required by law, regulation or executive order to remain closed, except as may be otherwise specified as contemplated by Section 301.

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“Commission” means the Securities and Exchange Commission, as from time to time constituted, created under the Securities Exchange Act of 1934, as amended, or, if at any time after the date of execution and delivery of this Indenture such Commission is not existing and performing the duties now assigned to it under the Trust Indenture Act, then the body, if any, performing such duties at such time.

“Company” means the Person named as the “Company” in the first paragraph of this Indenture until a successor Person shall have become such pursuant to the applicable provisions of this Indenture, and thereafter “Company” shall mean such successor Person.

“Company Request” or “Company Order” means a written request or order signed in the name of the Company by an Authorized Officer and delivered to the Trustee.

“Corporate Trust Office” means the office of the Trustee at which at any particular time its corporate trust business shall be principally administered, which office at the date of execution and delivery of this Indenture is located at Philadelphia, Pennsylvania.

“corporation” means a corporation, association, company, limited liability company, partnership, joint stock company, business or statutory trust or other business entity, and references to “corporate” and other derivations of “corporation” herein shall be deemed to include appropriate derivations of such entities.

“Depositary” means, with respect to the Securities of any series issuable or issued in whole or in part in the form of one or more Global Securities, the clearing agency registered under the Exchange Act specified for that purpose as contemplated by Section 301.

“Defaulted Interest” has the meaning specified in Section 307.

“Discount Security” means any Security which provides for an amount less than the principal amount thereof to be due and payable upon a declaration of acceleration of the Maturity thereof pursuant to Section 802. “Interest” with respect to a Discount Security means interest, if any, borne by such Security at a Stated Interest Rate.

“Dollar” or “$” means a dollar or other equivalent unit in such coin or currency of the United States as at the time shall be legal tender for the payment of public and private debts.

“Eligible Obligations” means:

(a) with respect to Securities denominated in Dollars, Government Obligations; or

(b) with respect to Securities denominated in a currency other than Dollars or in a composite currency, such other obligations or instruments as shall be specified with respect to such Securities, as contemplated by Section 301.

“Event of Default” has the meaning specified in Section 801.

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“Exchange Act” means the Securities Exchange Act of 1934 and any statute successor thereto, in each case as amended from time to time.

“Global Security” means a Security that evidences all or part of the Securities of any series and bears the legend set forth in Section 202 (or such additional or other legend or legends as may be specified as contemplated by Section 301 for such Securities).

“Governmental Authority” means the government of any country or state or of any county, municipality or other political subdivision of any of the foregoing, or any department, agency, authority or other instrumentality of any of the foregoing.

“Government Obligations” means:

(a) direct obligations of, or obligations the principal of and interest on which are unconditionally guaranteed by, the United States and entitled to the benefit of the full faith and credit thereof; and

(b) certificates, depositary receipts or other instruments which evidence a direct ownership interest in obligations described in clause (a) above or in any specific interest or principal payments due in respect thereof; provided, however, that the custodian of such obligations or specific interest or principal payments shall be a bank or trust company (which may include the Trustee or any Paying Agent) subject to Federal or State supervision or examination with a combined capital and surplus of at least $50,000,000; and provided, further, that except as may be otherwise required by law, such custodian shall be obligated to pay to the holders of such certificates, depositary receipts or other instruments the full amount received by such custodian in respect of such obligations or specific payments and shall not be permitted to make any deduction therefrom.

“Holder” means a Person in whose name a Security is registered in the Security Register.

“Indenture” means this instrument as originally executed and delivered and as it may from time to time be supplemented or amended by one or more indentures supplemental hereto entered into pursuant to the applicable provisions hereof, including, for all purposes of this instrument and any such supplemental indenture, the provisions of the Trust Indenture Act that are deemed to be a part of and govern this Indenture and such supplemental indenture, respectively, and shall include the terms of a particular series of Securities established as contemplated by Section 301.

“Interest Payment Date,” when used with respect to any Security, means the Stated Maturity of an installment of interest on such Security.

“Jurisdiction of Incorporation” shall mean each jurisdiction in which the Company is incorporated or organized.

“Maturity,” when used with respect to any Security, means the date on which the principal of such Security or an installment of principal becomes due and payable as provided in such Security or in this Indenture, whether at the Stated Maturity, by declaration of acceleration, upon call for redemption or otherwise.

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“Officer’s Certificate” means a certificate signed by an Authorized Officer and delivered to the Trustee.

“Opinion of Counsel” means a written opinion of counsel, who may be counsel for the Company or other counsel reasonably acceptable to the Trustee.

“Outstanding,” when used with respect to Securities, means, as of the date of determination, all Securities theretofore authenticated and delivered under this Indenture, except:

(a) Securities theretofore canceled or delivered to the Security Registrar for cancellation;

(b) Securities deemed to have been paid in accordance with Section 701; and

(c) Securities which have been paid pursuant to Section 306 or in exchange for or in lieu of which other Securities have been authenticated and delivered pursuant to this Indenture, other than any such Securities in respect of which there shall have been presented to the Trustee proof satisfactory to it and the Company that such Securities are held by a bona fide purchaser or purchasers in whose hands such Securities are valid obligations of the Company;

provided, however, that in determining whether or not the Holders of the requisite principal amount of the Securities Outstanding under this Indenture, or the Outstanding Securities of any series or Tranche, have given any request, demand, authorization, direction, notice, consent or waiver hereunder or whether or not a quorum is present at a meeting of Holders of Securities,

(x) Securities owned by the Company or any other obligor upon the Securities or any Affiliate of the Company or of such other obligor (unless the Company, any such obligors and any such Affiliates own all Securities Outstanding under this Indenture, or (except for the purposes of actions to be taken by Holders of (i) more than one series voting as a class under Section 812 or (ii) more than one series or more than one Tranche, as the case may be, voting as a class under Section 1202) all Outstanding Securities of each series and each Tranche with respect to which such request, demand, authorization, direction, notice, consent or waiver is required, as the case may be), shall be disregarded and deemed not to be Outstanding, except that, in determining whether the Trustee shall be protected in relying upon any such request, demand, authorization, direction, notice, consent or waiver or upon any such determination as to the presence of a quorum, only Securities which a Responsible Officer of the Trustee actually knows to be so owned shall be so disregarded; provided, however, that Securities so owned which have been pledged in good faith may be regarded as Outstanding if the pledgee establishes to the satisfaction of the Trustee the pledgee’s right so to act with respect to such Securities and that the pledgee is not the Company or any other obligor upon the Securities or any Affiliate of the Company or of such other obligor;

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(y) the principal amount of a Discount Security that shall be deemed to be Outstanding for such purposes shall be the amount of the principal thereof that would be due and payable as of the date of such determination upon a declaration of acceleration of the Maturity thereof pursuant to Section 802; and

(z) the principal amount of any Security which is denominated in a currency other than Dollars or in a composite currency that shall be deemed to be Outstanding for such purposes shall be the amount of Dollars which could have been purchased by the principal amount of such currency or composite currency evidenced by such Security, in each case certified to the Trustee in an Officer’s Certificate, based (i) on the average of the mean of the buying and selling spot rates quoted by three banks which are members of the New York Clearing House Association selected by the Company in effect at 11:00 a.m. (New York time) in The City of New York on the fifth Business Day preceding any such determination or (ii) if on such fifth Business Day it shall not be possible or practicable to obtain such quotations from three such banks, on such other quotations or alternative methods of determination which shall be as consistent as practicable with the method set forth in (i) above;

provided, further, that, in the case of any Security the principal of which is payable from time to time without presentment or surrender, the principal amount of such Security that shall be deemed to be Outstanding at any time for all purposes of this Indenture shall be the original principal amount thereof less the aggregate amount of principal thereof theretofore paid.

“Paying Agent” means any Person, including the Company, authorized by the Company to pay the principal of and premium, if any, or interest, if any, on any Securities on behalf of the Company.

“Periodic Offering” means an offering of Securities of a series from time to time, any or all of the specific terms of which Securities, including without limitation the rate or rates of interest, if any, thereon, the Stated Maturity or Maturities thereof and the redemption provisions, if any, with respect thereto, are to be determined by the Company or its agents from time to time subsequent to the initial request for the authentication and delivery of such Securities by the Trustee, as contemplated in Section 301 and clause (b) of Section 303.

“Person” means any individual, corporation, joint venture, trust, limited liability partnership or other unincorporated organization or any Governmental Authority.

“Place of Payment,” when used with respect to the Securities of any series, or Tranche thereof, means the place or places, specified as contemplated by Section 301, at which, subject to Section 602, principal of and premium, if any, interest, if any, and Additional Amounts, if any, on the Securities of such series or Tranche are payable.

“Predecessor Security” of any particular Security means every previous Security evidencing all or a portion of the same debt as that evidenced by such particular Security; and, for the purposes of this definition, any Security authenticated and delivered under Section 306 in exchange for or in lieu of a mutilated, destroyed, lost or stolen Security shall be deemed (to the extent lawful) to evidence the same debt as the mutilated, destroyed, lost or stolen Security.

“Redemption Date,” when used with respect to any Security to be redeemed, means the date fixed for such redemption by or pursuant to this Indenture.

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“Redemption Price,” when used with respect to any Security to be redeemed, means the price at which it is to be redeemed pursuant to this Indenture, exclusive of accrued and unpaid interest.

“Regular Record Date” for the interest payable on any Interest Payment Date on the Securities of any series means the date specified for that purpose as contemplated by Section 301.

“Required Currency” has the meaning specified in Section 312.

“Responsible Officer,” when used with respect to the Trustee, means any Vice President, Assistant Vice President, Trust Officer or other officer of the Trustee who, in the case of each of the foregoing, is assigned by the Trustee to its corporate trust department responsible for the administration of this Indenture that is located in the Corporate Trust Office.

“Securities” has the meaning stated in the first recital of this Indenture and more particularly means any securities authenticated and delivered under this Indenture.

“Security Register” and “Security Registrar” have the respective meanings specified in Section 305.

“Senior Indebtedness” means all obligations (other than non-recourse obligations and the indebtedness issued under this Indenture) of, or guaranteed or assumed by, the Company for borrowed money, including both senior and subordinated indebtedness for borrowed money (other than the Securities), or for the payment of money relating to any lease which is capitalized on the consolidated balance sheet of the Company and its subsidiaries in accordance with generally accepted accounting principles as in effect from time to time, or evidenced by bonds, debentures, notes or other similar instruments, and in each case, amendments, renewals, extensions, modifications and refundings of any such indebtedness or obligations, whether existing as of the date of this Indenture or subsequently incurred by the Company unless, in the case of any particular indebtedness, renewal, extension or refunding, the instrument creating or evidencing the same or the assumption or guarantee of the same expressly provides that such indebtedness, renewal, extension or refunding is not superior in right of payment to or is pari passu with the Securities.

“Special Record Date” for the payment of any Defaulted Interest on the Securities of any series means a date fixed by the Trustee pursuant to Section 307.

“Stated Interest Rate” means a rate (whether fixed or variable) at which an obligation by its terms is stated to bear simple interest. Any calculation or other determination to be made under this Indenture by reference to the Stated Interest Rate on a Security shall be made without regard to the effective interest cost to the Company of such Security and without regard to the Stated Interest Rate on, or the effective cost to the Company of, any other indebtedness in respect of which the Company’s obligations are evidenced or secured in whole or in part by such Security.

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“Stated Maturity,” when used with respect to any obligation or any installment of principal thereof or interest thereon, means the date on which the principal of such obligation or such installment of principal or interest is stated to be due and payable (without regard to any provisions for redemption, prepayment, acceleration, purchase or extension); provided that, with regard to any installment of interest, Stated Maturity shall not include any date as to which the Company shall have elected to extend the interest payment periods or defer the payment of interest in accordance with Section 311.

“Subsidiary” means a corporation more than 50% of the outstanding voting stock of which is owned, directly or indirectly, by the Company or by one or more other Subsidiaries, or by the Company and one or more other Subsidiaries. For the purposes of this definition, “voting stock” means stock (or other interests) of a corporation having voting power for the election of directors, managers or trustees thereof, whether at all times or only so long as no senior class of stock (or other interests) has such voting power by reason of any contingency.

“Tranche” means a group of Securities which (a) are of the same series and (b) have identical terms except as to principal amount and/or date of issuance.

“Trust Indenture Act” means, as of any time, the Trust Indenture Act of 1939, as amended, or any successor statute, as in effect at such time.

“Trustee” means the Person named as the “Trustee” in the first paragraph of this Indenture until a successor Trustee shall have become such with respect to one or more series of Securities pursuant to the applicable provisions of this Indenture, and thereafter “Trustee” shall mean or include each Person who is then a Trustee hereunder, and if at any time there is more than one such Person, “Trustee” as used with respect to the Securities of any series shall mean the Trustee with respect to Securities of that series.

“United States” means the United States of America, its territories, its possessions and other areas subject to its political jurisdiction.

Section 102. Certificates and Opinions

Except as otherwise expressly provided in this Indenture, upon any application or request by the Company to the Trustee to take any action under any provision of this Indenture, the Company shall, if requested by the Trustee, furnish to the Trustee an Officer’s Certificate stating that in the opinion of the Person signing such Officer’s Certificate all conditions precedent, if any, provided for in this Indenture relating to the proposed action (including any covenants compliance with which constitutes a condition precedent) have been complied with and an Opinion of Counsel stating that in the opinion of such counsel all such conditions precedent, if any, have been complied with, except that in the case of any such application or request as to which the furnishing of such documents is specifically required by any provision of this Indenture relating to such particular application or request, no additional certificate or opinion need be furnished.

Every certificate or opinion with respect to compliance with a condition or covenant provided for in this Indenture shall include:

(a) a statement that each Person signing such certificate or opinion has read such covenant or condition and the definitions herein relating thereto;

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(b) a brief statement as to the nature and scope of the examination or investigation upon which the statements or opinions contained in such certificate or opinion are based;

(c) a statement that, in the opinion of each such Person, such Person has made such examination or investigation as is necessary to enable such Person to express an informed opinion as to whether or not such covenant or condition has been complied with; and

(d) a statement as to whether, in the opinion of each such Person, such condition or covenant has been complied with.

Section 103. Form of Documents Delivered to Trustee

Any certificate or opinion of an officer of the Company may be based, insofar as it relates to legal matters, upon a certificate or opinion of, or representations by, counsel, unless such officer knows, or in the exercise of reasonable care should know, that the certificate or opinion or representations with respect to the matters upon which such officer’s certificate or opinion are based are erroneous. Any such certificate or Opinion of Counsel may be based, insofar as it relates to factual matters, upon a certificate or opinion of, or representations by an officer or officers of the Company stating that the information with respect to such factual matters is in the possession of the Company, unless such counsel knows, or in the exercise of reasonable care should know, that the certificate or opinion or representations with respect to such matters are erroneous. In addition, any Opinion of Counsel may be based (without further examination or investigation), insofar as it relates to or is dependent upon matters covered in an Opinion of Counsel rendered by other counsel, upon such other Opinion of Counsel, unless such counsel has actual knowledge that the Opinion of Counsel rendered by such other counsel with respect to the matters upon which his Opinion of Counsel may be based as aforesaid are erroneous. If, in order to render any Opinion of Counsel provided for herein, the signer thereof shall deem it necessary that additional facts or matters be stated in any Officer’s Certificate provided for herein, then such certificate may state all such additional facts or matters as the signer of such Opinion of Counsel may request.

In any case where several matters are required to be certified by, or covered by an opinion of, any specified Person, it is not necessary that all such matters be certified by, or covered by the opinion of, only one such Person, or that they be so certified or covered by only one document, but one such Person may certify or give an opinion with respect to some matters and one or more other such Persons as to other matters, and any such Person may certify or give an opinion as to such matters in one or several documents.

Where any Person is required to make, give or execute two or more applications, requests, consents, certificates, statements, opinions or other instruments under this Indenture, they may, but need not, be consolidated and form one instrument.

Whenever, subsequent to the receipt by the Trustee of any Board Resolution, Officer’s Certificate, Opinion of Counsel or other document or instrument, a clerical, typographical or other inadvertent or unintentional error or omission shall be discovered therein,

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a new document or instrument may be substituted therefor in corrected form with the same force and effect as if originally filed in the corrected form and, irrespective of the date or dates of the actual execution and/or delivery thereof, such substitute document or instrument shall be deemed to have been executed and/or delivered as of the date or dates required with respect to the document or instrument for which it is substituted. Anything in this Indenture to the contrary notwithstanding, if any such corrective document or instrument indicates that action has been taken by or at the request of the Company which could not have been taken had the original document or instrument not contained such error or omission, the action so taken shall not be invalidated or otherwise rendered ineffective but shall be and remain in full force and effect, except to the extent that such action was a result of willful misconduct or bad faith. Without limiting the generality of the foregoing, any Securities issued under the authority of such defective document or instrument shall nevertheless be the valid obligations of the Company entitled to the benefits of this Indenture equally and ratably with all other Outstanding Securities, except as aforesaid.

Section 104. Acts of Holders

(a) Any request, demand, authorization, direction, notice, consent, election, waiver or other action provided by this Indenture to be made, given or taken by Holders may be embodied in and evidenced by one or more instruments of substantially similar tenor signed by such Holders in person or by an agent duly appointed in writing or, alternatively, may be embodied in and evidenced by the record of Holders voting in favor thereof, either in person or by proxies duly appointed in writing, at any meeting of Holders duly called and held in accordance with the provisions of Article Thirteen, or a combination of such instruments and any such record. Except as herein otherwise expressly provided, such action shall become effective when such instrument or instruments or record or both are delivered to the Trustee and, where it is hereby expressly required, to the Company. Such instrument or instruments and any such record (and the action embodied therein and evidenced thereby) are herein sometimes referred to as the “Act” of the Holders signing such instrument or instruments and so voting at any such meeting. Proof of execution of any such instrument or of a writing appointing any such agent, or of the holding by any Person of a Security, shall be sufficient for any purpose of this Indenture and (subject to Section 901) conclusive in favor of the Trustee and the Company, if made in the manner provided in this Section. The record of any meeting of Holders shall be proved in the manner provided in Section 1306.

(b) The fact and date of the execution by any Person of any such instrument or writing may be proved by the affidavit of a witness of such execution or by a certificate of a notary public or other officer authorized by law to take acknowledgments of deeds, certifying that the individual signing such instrument or writing acknowledged to him the execution thereof or may be proved in any other manner which the Trustee and the Company deem sufficient. Where such execution is by a signer acting in a capacity other than his individual capacity, such certificate or affidavit shall also constitute sufficient proof of his authority.

(c) The principal amount (except as otherwise contemplated in clause (y) of the first proviso to the definition of Outstanding) and serial numbers of Securities in registered form held by any Person, and the ownership and date of holding the same, shall be proved by the Security Register.

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(d) Any request, demand, authorization, direction, notice, consent, election, waiver or other Act of a Holder shall bind every future Holder of the same Security and the Holder of every Security issued upon the registration of transfer thereof or in exchange therefor or in lieu thereof in respect of anything done, omitted or suffered to be done by the Trustee or the Company in reliance thereon, whether or not notation of such action is made upon such Security.

(e) Until such time as written instruments shall have been delivered to the Trustee with respect to the requisite percentage of principal amount of Securities for the action contemplated by such instruments, any such instrument executed and delivered by or on behalf of a Holder may be revoked with respect to any or all of such Securities by written notice by such Holder or any subsequent Holder, proven in the manner in which such instrument was proven.

(f) Securities of any series, or any Tranche thereof, authenticated and delivered after any Act of Holders may, and shall if required by the Trustee, bear a notation in form approved by the Trustee as to any action taken by such Act of Holders. If the Company shall so determine, new Securities of any series, or any Tranche thereof, so modified as to conform, in the opinion of the Trustee and the Company, to such action may be prepared and executed by the Company and authenticated and delivered by the Trustee in exchange for Outstanding Securities of such series or Tranche.

(g) If the Company shall solicit from Holders any request, demand, authorization, direction, notice, consent, waiver or other Act, the Company may, at its option, fix in advance a record date for the determination of Holders entitled to give such request, demand, authorization, direction, notice, consent, waiver or other Act, but the Company shall have no obligation to do so. If such a record date is fixed, such request, demand, authorization, direction, notice, consent, waiver or other Act may be given before or after such record date, but only the Holders of record at the close of business on the record date shall be deemed to be Holders for the purposes of determining whether Holders of the requisite proportion of the Outstanding Securities have authorized or agreed or consented to such request, demand, authorization, direction, notice, consent, waiver or other Act, and for that purpose the Outstanding Securities shall be computed as of the record date.

Section 105. Notices, etc. to Trustee and Company

Any request, demand, authorization, direction, notice, consent, election, waiver or other Act of Holders or other document provided or permitted by this Indenture to be made upon, given or furnished to, or filed with, the Trustee by any Holder or by the Company, or the Company by the Trustee or by any Holder, shall be sufficient for every purpose hereunder (unless otherwise herein expressly provided) if in writing and delivered personally to an officer or other responsible employee of the addressee at the applicable location set forth below or at such other location as such party may from time to time designate by written notice, or

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transmitted by facsimile transmission or other direct written electronic means to such telephone number or other electronic communications address as the parties hereto shall from time to time designate by written notice, or transmitted by certified or registered mail, charges prepaid, to the applicable address set forth below or to such other address as such party may from time to time designate by written notice:

If to the Trustee, to:

U.S. Bank National Association

50 S 16th St, Suite 2000,

Philadelphia, PA 19102

Attention: Corporate Trust Department, George Rayzis

Telephone: 215.761.9317

With a copy, which shall not constitute notice, to:

Lamb McErlane PC

Attention: Thomas J. O’Neill and Helen Esbenshade

24 E. Market St.

PO Box 565

West Chester, PA 19381

If to the Company, to:

Enterprise Financial Services Corp

150 N. Meramec

St. Louis, Missouri 63105

Attention: General Counsel

Telephone: 314.810.3773

With a copy, which shall not constitute notice, to:

Reed Smith LLP

Three Logan Square

1717 Arch Street, Suite 3100

Philadelphia, PA 19103

Attention: Paul J. Jaskot

Any communication contemplated herein shall be deemed to have been made, given, furnished and filed if personally delivered, on the date of delivery, if transmitted by facsimile transmission or other direct written electronic means, on the date of receipt, and if transmitted by certified or registered mail, on the date of receipt.

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Section 106. Notice to Holders of Securities; Waiver

Except as otherwise expressly provided herein or specified as contemplated in Section 301 with respect to the Securities of any series or any Tranche thereof, where this Indenture provides for notice to Holders of any event, such notice shall be sufficiently given, and shall be deemed given, to Holders if in writing and mailed, first-class postage prepaid, to each Holder affected by such event, at the address of such Holder as it appears in the Security Register, not later than the latest date, if any, and not earlier than the earliest date, if any, prescribed for the giving of such notice.

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. In any case where notice to Holders is given by mail, neither the failure to mail such notice, nor any defect in any notice so mailed, to any particular Holder shall affect the sufficiency of such notice with respect to other Holders.

Any notice required by this Indenture may be waived in writing by the Person entitled to receive such notice, either before or after the event otherwise to be specified therein, and such waiver shall be the equivalent of such notice. Waivers of notice by Holders shall be filed with the Trustee, but such filing shall not be a condition precedent to the validity of any action taken in reliance upon such waiver.

Section 107. Conflict with Trust Indenture Act

If (a) any provision of this Indenture limits, qualifies or conflicts with another provision hereof which is required or deemed to be included in this Indenture by, or is otherwise governed by, any of the provisions of the Trust Indenture Act, such other provision shall control; and (b) any provision hereof otherwise conflicts with the Trust Indenture Act, the Trust Indenture Act shall control unless otherwise provided as contemplated by Section 301 with respect to any series of Securities.

Section 108. Effect of Headings and Table of Contents

The Article and Section headings in this Indenture and the Table of Contents are for convenience only and shall not affect the construction hereof.

Section 109. Successors and Assigns

All covenants and agreements in this Indenture by the Company and Trustee shall bind their respective successors and assigns, whether so expressed or not.

Section 110. Separability Clause

In case any provision in this Indenture or the Securities shall be held to be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

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Section 111. Benefits of Indenture

Unless otherwise provided as contemplated by Section 301 with respect to any series of Securities, nothing in this Indenture or the Securities, express or implied, shall give to any Person, other than the parties hereto, their successors hereunder and the Holders and, so long as the notice described in Section 1513 hereof has not been given, the holders of Senior Indebtedness, any benefit or any legal or equitable right, remedy or claim under this Indenture.

Section 112. Governing Law

This Indenture and the Securities shall be governed by and construed in accordance with the laws of the State of New York (including without limitation Section 5-1401 of the New York General Obligations Law or any successor to such statute); provided, however, that all matters governing the authorization by the Company of this Indenture and the Securities and corporate existence of the Company will be governed by, and construed in accordance with, the laws of the jurisdiction in which the Company is incorporated or formed.

Section 113. Legal Holidays

In any case where any Interest Payment Date, Redemption Date or Stated Maturity of any Security shall not be a Business Day at any Place of Payment, then (notwithstanding any other provision of this Indenture or of the Securities, other than a provision in the Securities of any series, or any Tranche thereof, or in the indenture supplemental hereto, Board Resolution or the Officer’s Certificate which establishes the terms of the Securities of such series or Tranche, which specifically states that such provision shall apply in lieu of this Section) payment of interest and Additional Amounts, if any, or principal and premium, if any, need not be made at such Place of Payment on such date, but may be made on the next succeeding Business Day at such Place of Payment, with the same force and effect, and in the same amount, as if made on the Interest Payment Date or Redemption Date, or at the Stated Maturity, as the case may be, and, if such payment is made or duly provided for on such Business Day, no interest shall accrue on the amount so payable for the period from and after such Interest Payment Date, Redemption Date or Stated Maturity, as the case may be, to such Business Day.

ARTICLE 2

Security Forms

Section 201. Forms Generally

The definitive Securities of each series shall be in substantially the form or forms thereof established in the indenture supplemental hereto establishing such series or in a Board Resolution establishing such series, or in an Officer’s Certificate pursuant to such supplemental indenture or Board Resolution, in each case with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by this Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed thereon as may be required to comply with the rules of any securities exchange or Depositary therefor as may, consistently herewith, be determined by the officers executing such Securities, as evidenced by their execution thereof. If the form or forms of Securities of any series are established in a Board Resolution or in an Officer’s Certificate pursuant to a supplemental indenture or a Board Resolution, such Board Resolution and Officer’s Certificate, if any, shall be delivered to the Trustee at or prior to the delivery of the Company Order contemplated by Section 303 for the authentication and delivery of such Securities.

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Unless otherwise specified as contemplated by Section 301 or clause (g) of Section 1201, the Securities of each series shall be issuable in registered form without coupons. The definitive Securities shall be produced in such manner as shall be determined by the Person executing such Securities, as evidenced by their execution thereof.

Section 202. Form of Legend for Global Securities.

Unless otherwise provided with respect to a series of Securities as contemplated in Section 301(v), any Global Security authenticated and delivered hereunder shall bear a legend in substantially the following form:

“This Security is a Global Security within the meaning of the Indenture hereinafter referred to and is registered in the name of a Depositary or a nominee thereof. This Security may not be exchanged in whole or in part for a Security registered, and no transfer of this Security in whole or in part may be registered in the name of any Person other than such Depositary or a nominee thereof, except in the limited circumstances described in the Indenture.”

Section 203. Form of Trustee’s Certificate of Authentication

The Trustee’s certificate of authentication shall be in substantially the form set forth below:

This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture.

ARTICLE 3

The Securities

Section 301. Amount Unlimited; Issuable in Series

The aggregate principal amount of Securities which may be authenticated and delivered under this Indenture is unlimited.

The Securities may be issued in one or more series. Subject to the penultimate paragraph of this Section, prior to the authentication and delivery of Securities of any series there shall be established by specification in a supplemental indenture or in a Board Resolution, or in an Officer’s Certificate pursuant to a supplemental indenture or a Board Resolution:

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(a) the title of the Securities of such series (which shall distinguish the Securities of such series from Securities of all other series);

(b) any limit upon the aggregate principal amount of the Securities of such series which may be authenticated and delivered under this Indenture (except for Securities authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, other Securities of such series pursuant to Section 304, 305, 306, 406 or 1206 and, except for any Securities which, pursuant to Section 303, are deemed never to have been authenticated and delivered hereunder);

(c) the Person or Persons (without specific identification) to whom interest on Securities of such series, or any Tranche thereof, shall be payable on any Interest Payment Date, if other than the Persons in whose names such Securities (or one or more Predecessor Securities) are registered at the close of business on the Regular Record Date for such interest;

(d) the date or dates on which the principal of the Securities of such series, or any Tranche thereof, is payable or any formulary or other method or other means by which such date or dates shall be determined, by reference to an index or other fact or event ascertainable outside of this Indenture or otherwise (without regard to any provisions for redemption, prepayment, declaration of acceleration, purchase or extension);

(e) the rate or rates at which the Securities of such series, or any Tranche thereof, shall bear interest, if any (including the rate or rates at which overdue principal shall bear interest, if different from the rate or rates at which such Securities shall bear interest prior to Maturity, and, if applicable, the rate or rates at which overdue premium or interest shall bear interest, if any), or any formulary or other method or other means by which such rate or rates shall be determined, by reference to an index or other fact or event ascertainable outside of this Indenture or otherwise; the date or dates from which such interest shall accrue; the Interest Payment Dates on which such interest shall be payable and the Regular Record Date, if any, for the interest payable on such Securities on any Interest Payment Date; the right of the Company, if any, to extend the interest payment periods and the duration of any such extension, or to defer payment of interest, each as contemplated by Section 311; and the basis of computation of interest, if other than as provided in Section 310;

(f) the place or places at which or methods by which (1) the principal of and premium, if any, and interest, if any, on Securities of such series, or any Tranche thereof, shall be payable, (2) registration of transfer of Securities of such series, or any Tranche thereof, may be effected, (3) exchanges of Securities of such series, or any Tranche thereof, may be effected and (4) notices and demands to or upon the Company in respect of the Securities of such series, or any Tranche thereof, and this Indenture may be served; the Security Registrar and any Paying Agent or Agents for such series or Tranche; and if such is the case, that the principal of such Securities shall be payable without presentment or surrender thereof;

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(g) the period or periods within which, or the date or dates on which, the price or prices at which and the terms and conditions upon which the Securities of such series, or any Tranche thereof, may be redeemed, in whole or in part, at the option of the Company and any restrictions on such redemptions, including but not limited to a restriction on a partial redemption by the Company of the Securities of any series, or any Tranche thereof, resulting in delisting of such Securities from any national exchange;

(h) the obligation or obligations, if any, of the Company to redeem or purchase or repay the Securities of such series, or any Tranche thereof, pursuant to any sinking fund or other mandatory redemption provisions or at the option of a Holder thereof and the period or periods within which or the date or dates on which, the price or prices at which and the terms and conditions upon which such Securities shall be redeemed or purchased or repaid, in whole or in part, pursuant to such obligation, and applicable exceptions to the requirements of Section 404 in the case of mandatory redemption or redemption or repayment at the option of the Holder;

(i) the denominations in which Securities of such series, or any Tranche thereof, shall be issuable if other than denominations of $1,000 and any integral multiple thereof;

(j) the currency or currencies, including composite currencies, in which payment of the principal of and premium, if any, and interest, if any, on the Securities of such series, or any Tranche thereof, shall be payable (if other than in Dollars);

(k) if the principal of or premium, if any, or interest, if any, on the Securities of such series, or any Tranche thereof, are to be payable, at the election of the Company or a Holder thereof, in a coin or currency other than that in which the Securities are stated to be payable, the period or periods within which, and the terms and conditions upon which, such election may be made;

(l) if the principal of or premium, if any, or interest, if any, on the Securities of such series, or any Tranche thereof, are to be payable, or are to be payable at the election of the Company or a Holder thereof, in securities or other property, the type and amount of such securities or other property, or the formulary or other method or other means by which such amount shall be determined, and the period or periods within which, and the terms and conditions upon which, any such election may be made;

(m) if the amount payable in respect of principal of or premium, if any, or interest, if any, on the Securities of such series, or any Tranche thereof, may be determined with reference to an index or other fact or event ascertainable outside of this Indenture, the manner in which such amounts shall be determined to the extent not established pursuant to clause (e) of this paragraph;

(n) if other than the principal amount thereof, the portion of the principal amount of Securities of such series, or any Tranche thereof, which shall be payable upon declaration of acceleration of the Maturity thereof pursuant to Section 802;

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(o) any Events of Default, in addition to those specified in Section 801, with respect to the Securities of such series, and any covenants of the Company for the benefit of the Holders of the Securities of such series, or any Tranche thereof, in addition to those set forth in Article Six or any exceptions to those set forth in Article Six;

(p) the terms, if any, pursuant to which the Securities of such series, or any Tranche thereof, may be converted into or exchanged for ordinary shares or other securities of the Company or any other Person;

(q) the obligations or instruments, if any, which shall be considered to be Eligible Obligations in respect of the Securities of such series, or any Tranche thereof, denominated in a currency other than Dollars or in a composite currency, and any additional or alternative provisions for the reinstatement of the Company’s indebtedness in respect of such Securities after the satisfaction and discharge thereof as provided in Section 701;

(r) if applicable, that any Securities of such series, or any Tranche thereof, shall be issuable in whole or in part in the form of one or more Global Securities and, in such case, the respective Depositaries for such Global Securities, the form of any legend or legends which shall be borne by any such Global Security in addition to or in lieu of that set forth in Section 202 and any circumstances in addition to or in lieu of those set forth in Section 305 in which any such Global Security may be exchanged in whole or in part for Securities registered, and any transfer of such Global Security in whole or in part may be registered, in the name or names of Persons other than the Depositary for such Global Security or a nominee thereof and any other matters incidental to such Securities;

(s) if the Securities of such series, or any Tranche thereof, are to be issuable as bearer securities, any and all matters incidental thereto which are not specifically addressed in a supplemental indenture as contemplated by clause (g) of Section 1201;

(t) to the extent not established pursuant to clause (r) of this paragraph, any limitations on the rights of the Holders of the Securities of such Series, or any Tranche thereof, to transfer or exchange such Securities or to obtain the registration of transfer thereof; and if a service charge will be made for the registration of transfer or exchange of Securities of such series, or any Tranche thereof, the amount or terms thereof;

(u) any exceptions to Section 113, or variation in the definition of Business Day, with respect to the Securities of such series or any Tranche thereof;

(v) any collateral, security, insurance, guarantee or assurance for the Securities of such series;

(w) any rights or duties of another Person to assume the obligations of the Company with respect to the Securities of such series (whether as joint obligor, primary obligor, secondary obligor or substitute obligor) and any rights or duties to discharge and release any obligor with respect to the Securities of such series or the Indenture to the extent related to such series;

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(x) any rights to change or eliminate any provision of this Indenture or to add any new provision to this Indenture (by supplemental indenture or otherwise) without the consent of the Holders of the Securities of such series, or with the consent of the Holders of the Securities of such series as specified for such series or any Tranche thereof;

(y) the terms relating to any Additional Amounts that may be payable in certain circumstances with respect to the Securities of such series or any Tranche thereof; and

(z) any other terms of the Securities of such series, or any Tranche thereof, not inconsistent with the provisions of this Indenture.

With respect to Securities of a series subject to a Periodic Offering, the indenture supplemental hereto or the Board Resolution which establishes such series, or the Officer’s Certificate pursuant to such supplemental indenture or Board Resolution, as the case may be, may provide general terms or parameters for Securities of such series and provide either that the specific terms of Securities of such series, or any Tranche thereof, shall be specified in a Company Order or that such terms shall be determined by the Company or its agents in accordance with procedures specified in a Company Order as contemplated by clause (b) of Section 303.

Unless otherwise provided with respect to a series of Securities as contemplated in Section 301(b), the aggregate principal amount of a series of Securities may be increased from time to time and additional Securities of such series may be issued up to any maximum aggregate principal amount authorized with respect to such series as increased.

Section 302. Denominations

Unless otherwise provided as contemplated by Section 301 with respect to any series of Securities, or any Tranche thereof, the Securities of each series shall be issuable in denominations of $1,000 and any integral multiple thereof.

Section 303. Execution, Authentication, Delivery and Dating

Unless otherwise provided as contemplated by Section 301 with respect to any series of Securities, or any Tranche thereof, the Securities shall be executed on behalf of the Company by an Authorized Officer and may have the corporate seal of the Company affixed thereto or reproduced thereon attested by any other Authorized Officer or by the Secretary or an Assistant Secretary of the Company. The signature of any or all of these officers on the Securities may be manual or facsimile.

Securities bearing the manual or facsimile signatures of individuals who were at the time of execution Authorized Officers or the Secretary or an Assistant Secretary of the Company shall bind the Company, notwithstanding that such individuals or any of them have ceased to hold such offices prior to the authentication and delivery of such Securities or did not hold such offices at the date of such Securities.

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The Trustee shall authenticate and deliver Securities of a series, for original issue, at one time or from time to time in accordance with the Company Order referred to below, upon receipt by the Trustee of:

(a) the instrument or instruments establishing the form or forms and terms of such series, as provided in Sections 201 and 301;

(b) a Company Order requesting the authentication and delivery of such Securities, and to the extent that the terms of such Securities shall not have been established in an indenture supplemental hereto or in a Board Resolution, or in an Officer’s Certificate pursuant to a supplemental indenture or Board Resolution, all as contemplated by Sections 201 and 301, either (i) establishing such terms or (ii) in the case of Securities of a series subject to a Periodic Offering, specifying procedures, acceptable to the Trustee, by which such terms are to be established (which procedures may provide, to the extent acceptable to the Trustee, for authentication and delivery pursuant to oral or electronic instructions from the Company or any agent or agents thereof, which oral instructions are to be promptly confirmed electronically or in writing), in either case in accordance with the instrument or instruments delivered pursuant to clause (a) above;

(c) the Securities of such series, each executed on behalf of the Company by an Authorized Officer;

(d) Opinion or Opinions of Counsel to the effect that:

(i) the form or forms of such Securities have been duly authorized by the Company and have been established in conformity with the provisions of this Indenture;

(ii) the terms of such Securities have been duly authorized by the Company and have been established in conformity with the provisions of this Indenture; and

(iii) when such Securities shall have been authenticated and delivered by the Trustee and issued and delivered by the Company in the manner and subject to any conditions specified in such Opinion of Counsel, such Securities will have been duly issued under this Indenture and will constitute valid and legally binding obligations of the Company, entitled to the benefits provided by this Indenture, and enforceable in accordance with their terms, subject, as to enforcement, to laws relating to or affecting generally the enforcement of mortgagees’ and other creditors’ rights, including, without limitation, bankruptcy, insolvency, reorganization, receivership, moratorium and other laws affecting the rights and remedies of creditors and mortgagees’ generally and general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law);

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provided, however, that, with respect to Securities of a series subject to a Periodic Offering, the Trustee shall be entitled to receive such Opinion of Counsel only once at or prior to the time of the first authentication of such Securities (provided that such Opinion of Counsel addresses the authentication and delivery of all Securities of such series) and that in lieu of the opinions described in clauses (ii) and (iii) above Counsel may opine that:

(iv) when the terms of such Securities shall have been established pursuant to a Company Order or Orders or pursuant to such procedures (acceptable to the Trustee) as may be specified from time to time by a Company Order or Orders, all as contemplated by and in accordance with the instrument or instruments delivered pursuant to clause (a) above, such terms will have been duly authorized by the Company and will have been established in conformity with the provisions of this Indenture; and

(e) such Securities, when (1) executed by the Company, (2) authenticated and delivered by the Trustee in accordance with this Indenture, (3) issued and delivered by the Company and (4) paid for, all as contemplated by and in accordance with the aforesaid Company Order or Orders, as the case may be, will have been duly issued under this Indenture and will constitute valid and legally binding obligations of the Company, entitled to the benefits provided by the Indenture, and enforceable in accordance with their terms, subject, as to enforcement, to laws relating to or affecting generally the enforcement of mortgagees’ and other creditors’ rights, including, without limitation, bankruptcy, insolvency, reorganization, receivership, moratorium and other laws affecting the rights and remedies of creditors and mortgagees’ generally and general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

With respect to Securities of a series subject to a Periodic Offering, the Trustee may conclusively rely, as to the authorization by the Company of any of such Securities, the form, terms thereof and the legality, validity, binding effect and enforceability thereof, and compliance of the authentication and delivery thereof with the terms and conditions of this Indenture, upon the Opinion of Counsel and other documents delivered pursuant to Sections 201 and 301 and this Section, as applicable, at or prior to the time of the first authentication of Securities of such series unless and until such opinion or other documents have been superseded or revoked or expire by their terms. In connection with the authentication and delivery of Securities of a series subject to a Periodic Offering, the Trustee shall be entitled to assume that the Company’s instructions to authenticate and deliver such Securities do not violate any applicable law or any applicable rule, regulation or order of any Governmental Authority having jurisdiction over the Company.

If the form or terms of the Securities of any series have been established by or pursuant to a Board Resolution or an Officer’s Certificate as permitted by Sections 201 or 301, the Trustee shall not be required to authenticate such Securities if the issuance of such Securities pursuant to this Indenture will materially or adversely affect the Trustee’s own rights, duties or immunities under the Securities and this Indenture or otherwise in a manner which is not reasonably acceptable to the Trustee.

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Unless otherwise specified as contemplated by Section 301 with respect to any series of Securities, or any Tranche thereof, each Security shall be dated the date of its authentication.

Unless otherwise specified as contemplated by Section 301 with respect to any series of Securities, or any Tranche thereof, no Security shall be entitled to any benefit under this Indenture or be valid or obligatory for any purpose unless there appears on such Security a certificate of authentication substantially in the form provided for herein executed by the Trustee or an Authenticating Agent by manual signature, and such certificate upon any Security shall be conclusive evidence, and the only evidence, that such Security has been duly authenticated and delivered hereunder and is entitled to the benefits of this Indenture. Notwithstanding the foregoing, if any Security shall have been authenticated and delivered hereunder to the Company, or any Person acting on its behalf, but shall never have been issued and sold by the Company, and the Company shall deliver such Security to the Security Registrar for cancellation as provided in Section 309 together with a written statement (which need not comply with Section 102 and need not be accompanied by an Officer’s Certificate and an Opinion of Counsel) stating that such Security has never been issued and sold by the Company, for all purposes of this Indenture such Security shall be deemed never to have been authenticated and delivered hereunder and shall never be entitled to the benefits hereof.

Section 304. Temporary Securities

Pending the preparation of definitive Securities of any series or any Tranche thereof, the Company may execute, and upon a Company Order the Trustee shall authenticate and deliver, temporary Securities which are printed, lithographed, typewritten, mimeographed or otherwise produced, in any authorized denomination, substantially of the tenor of the definitive Securities in lieu of which they are issued, with such appropriate insertions, omissions, substitutions and other variations as the officers executing such Securities may determine, as evidenced by their execution of such Securities; provided, however, that temporary Securities need not recite specific redemption, sinking fund, conversion or exchange provisions.

Unless otherwise specified as contemplated by Section 301 with respect to the Securities of any series, or any Tranche thereof, after the preparation of definitive Securities of such series or Tranche, the temporary Securities of such series or Tranche shall be exchangeable, without charge to the Holder thereof, for definitive Securities of such series or Tranche upon surrender of such temporary Securities at the office or agency of the Company maintained pursuant to Section 602 in a Place of Payment for such Securities. Upon such surrender of temporary Securities for such exchange, the Company shall, except as aforesaid, execute and the Trustee shall authenticate and deliver in exchange therefor definitive Securities of the same series and Tranche of authorized denominations and of like tenor and aggregate principal amount.

Until exchanged in full as hereinabove provided, temporary Securities shall in all respects be entitled to the same benefits under this Indenture as definitive Securities of the same series and Tranche and of like tenor authenticated and delivered hereunder.

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Section 305. Registration, Registration of Transfer and Exchange

Unless otherwise specified as contemplated by Section 301 with respect to any series of Securities, the Company shall cause to be kept in one of the offices designated pursuant to Section 602, with respect to the Securities of each series, or any Tranche thereof, a register (the register kept in accordance with this Section being referred to as the “Security Register”) in which, subject to such reasonable regulations as it may prescribe, the Company shall provide for the registration of Securities of such series or Tranche and the registration of transfer thereof. The Company shall designate one Person to maintain the Security Register for the Securities of each series on a consolidated basis, and such Person is referred to herein, with respect to such series, as the “Security Registrar.” Anything herein to the contrary notwithstanding, the Company may designate one or more of its offices or an office of any Affiliate as an office in which a register with respect to the Securities of one or more series, or any Tranche or Tranches thereof, shall be maintained, and the Company may designate itself or any Affiliate the Security Registrar with respect to one or more of such series. The Security Register shall be open for inspection by the Trustee and the Company at all reasonable times.

Except as otherwise specified as contemplated by Section 301 with respect to the Securities of any series, or any Tranche thereof, upon surrender for registration of transfer of any Security of such series or Tranche at the office or agency of the Company maintained pursuant to Section 602 in a Place of Payment for such series or Tranche, the Company shall execute, and the Trustee shall authenticate and deliver, in the name of the designated transferee or transferees, one or more new Securities of the same series and Tranche, of authorized denominations and of like tenor and aggregate principal amount.

Except as otherwise specified as contemplated by Section 301 with respect to the Securities of any series, or any Tranche thereof, any Security of such series or Tranche may be exchanged at the option of the Holder, for one or more new Securities of the same series and Tranche, of authorized denominations and of like tenor and aggregate principal amount, upon surrender of the Securities to be exchanged at any such office or agency. Whenever any Securities are so surrendered for exchange, the Company shall execute, and the Trustee shall authenticate and deliver, the Securities which the Holder making the exchange is entitled to receive.

All Securities delivered upon any registration of transfer or exchange of Securities shall be valid obligations of the Company, evidencing the same debt, and entitled to the same benefits under this Indenture, as the Securities surrendered upon such registration of transfer or exchange.

Every Security presented or surrendered for registration of transfer or for exchange shall (if so required by the Company, the Trustee or the Security Registrar) be duly endorsed or shall be accompanied by a written instrument of transfer in form satisfactory to the Company, the Trustee or the Security Registrar, as the case may be, duly executed by the Holder thereof or his attorney duly authorized in writing.

Unless otherwise specified as contemplated by Section 301, with respect to Securities of any series, or any Tranche thereof, no service charge shall be made for any registration of transfer or exchange of Securities, but the Company may require payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in connection with any registration of transfer or exchange of Securities, other than exchanges pursuant to Section 304, 406 or 1206 not involving any transfer.

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Unless otherwise specified as contemplated by Section 301, with respect to Securities of any series, or any Tranche thereof, the Company shall not be required to execute or to provide for the registration of transfer of or the exchange of (a) Securities of any series, or any Tranche thereof, during a period of 15 days immediately preceding the date notice is to be given identifying the serial numbers of the Securities of such series or Tranche called for redemption or (b) any Security so selected for redemption in whole or in part, except the unredeemed portion of any Security being redeemed in part.

Each Global Security authenticated under this Indenture shall be registered in the name of the Depositary designated for such Global Security or a nominee thereof and delivered to such Depositary or a custodian therefor, and each such Global Security shall constitute a single Security for all purposes of this Indenture. Notwithstanding the foregoing, except as otherwise specified as contemplated by Section 301, no Global Security shall be registered for transfer or exchange, or authenticated or delivered, pursuant to this Section 305 or Sections 304, 306, 1206 or 406 in the name of a Person other than the Depositary for such Security or its nominee until (i) the Depositary with respect to a Global Security notifies the Company that it is unwilling or unable to continue as Depositary for such Global Security or the Depositary ceases to be a clearing agency registered under the Exchange Act and, in either such event, the Company notifies the Trustee that it is unable to appoint a successor Depositary within 90 days of any such event, (ii) the Company executes and delivers to the Trustee a Company Order that such Global Security shall be so transferable and exchangeable or (iii) there shall have occurred and be continuing an Event of Default with respect to the Securities of such series. Upon the occurrence in respect of any Global Security of any series of any one or more of the conditions specified in clauses (i), (ii) or (iii) of the preceding sentence or such other conditions as may be specified as contemplated by Section 301 for such series, such Global Security may be registered for transfer or exchange for Securities registered in the names of, or authenticated and delivered to, such Persons as the Depositary with respect to such series shall direct.

Except as provided in the preceding paragraph, any Security authenticated and delivered upon registration of transfer of, or in exchange for, or in lieu of, any Global Security or any portion thereof, whether pursuant to this Section, Section 304, 306, 1206 or 406 or otherwise, shall also be a Global Security and bear the legend specified in Section 202. Notwithstanding any other provision of this Indenture, a Global Security may not be transferred except as a whole by the Depositary for such Global Security to a nominee of such Depositary or to another Depositary or a nominee thereof or by a nominee of such Depositary to such Depositary or another nominee of such Depositary or to another Depositary or a nominee thereof.

Section 306. Mutilated, Destroyed, Lost and Stolen Securities

If any mutilated Security is surrendered to the Security Registrar, the Company shall execute and the Trustee shall authenticate and deliver in exchange therefor a new Security of the same series and Tranche, and of like tenor and principal amount and bearing a number not contemporaneously outstanding.

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If there shall be delivered to the Company and the Trustee (a) evidence to their satisfaction of the ownership of and the destruction, loss or theft of any Security and (b) such security or indemnity as may be reasonably required by them to save each of them and any agent of either of them harmless, then, in the absence of notice to the Company or the Trustee that such Security is held by a Person purporting to be the owner of such Security, the Company shall execute and the Trustee shall authenticate and deliver, in lieu of any such destroyed, lost or stolen Security, a new Security of the same series and Tranche, and of like tenor and principal amount and bearing a number not contemporaneously outstanding.

Notwithstanding the foregoing, in case any such mutilated, destroyed, lost or stolen Security has become or is about to become due and payable, the Company in its discretion may, instead of issuing a new Security, pay such Security.

Upon the issuance of any new Security under this Section, the Company may require the payment of a sum sufficient to cover any tax or other governmental charge that may be imposed in relation thereto and any other reasonable expenses (including the fees and expenses of the Trustee) connected therewith.

Every new Security of any series issued pursuant to this Section in lieu of any destroyed, lost or stolen Security shall constitute an original additional contractual obligation of the Company, whether or not the destroyed, lost or stolen Security shall be at any time enforceable by anyone other than the Holder of such new Security, and any such new Security shall be entitled to all the benefits of this Indenture equally and proportionately with any and all other Securities of such series duly issued hereunder.

The provisions of this Section are exclusive and shall preclude (to the extent lawful) all other rights and remedies with respect to the replacement or payment of mutilated, destroyed, lost or stolen Securities.

Section 307. Payment of Interest; Interest Rights Preserved

Unless otherwise specified as contemplated by Section 301 with respect to the Securities of any series, or any Tranche thereof, interest on any Security which is payable, and is punctually paid or duly provided for, on any Interest Payment Date shall be paid to the Person in whose name that Security (or one or more Predecessor Securities) is registered at the close of business on the Regular Record Date for such interest.

Subject to Section 311, any interest on any Security of any series which is payable, but is not punctually paid or duly provided for, on any Interest Payment Date (herein called “Defaulted Interest”) shall forthwith cease to be payable to the Holder on the related Regular Record Date by virtue of having been such Holder, and such Defaulted Interest may be paid by the Company, at its election in each case, as provided in clause (a) or (b) below:

(a) The Company may elect to make payment of any Defaulted Interest to the Persons in whose names the Securities of such series (or their respective Predecessor Securities) are registered at the close of business on a date (herein called a “Special Record Date”) for the payment of such Defaulted Interest, which shall be fixed in the following manner. The Company shall notify the Trustee in writing of the amount of

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Defaulted Interest proposed to be paid on each Security of such series and the date of the proposed payment, and at the same time the Company shall deposit with the Trustee an amount of money equal to the aggregate amount proposed to be paid in respect of such Defaulted Interest 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 Interest as in this clause provided. Thereupon the Trustee shall fix a Special Record Date for the payment of such Defaulted Interest 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 Trustee shall promptly notify the Company of such Special Record Date and, in the name and at the expense of the Company, shall promptly cause notice of the proposed payment of such Defaulted Interest and the Special Record Date therefor to be mailed, first-class postage prepaid, to each Holder of Securities of such series at the address of such Holder as it appears in the Security Register, not less than 10 days prior to such Special Record Date. Notice of the proposed payment of such Defaulted Interest and the Special Record Date therefor having been so mailed, such Defaulted Interest shall be paid to the Persons in whose names the Securities of such series (or their respective Predecessor Securities) are registered at the close of business on such Special Record Date.

(b) The Company may make payment of any Defaulted Interest on the Securities of any series in any other lawful manner not inconsistent with the requirements of any securities exchange on which such Securities may be listed, and upon such notice as may be required by such exchange, if, after 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.

Subject to the foregoing provisions of this Section and Section 305, each Security delivered under this Indenture upon registration of transfer of or in exchange for or in lieu of any other Security shall carry the rights to interest accrued and unpaid, and to accrue, which were carried by such other Security.

Section 308. Persons Deemed Owners

Prior to due presentment of a Security for registration of transfer, the Company, the Trustee and any agent of the Company or the Trustee may treat the Person in whose name such Security is registered as the absolute owner of such Security for the purpose of receiving payment of principal of and premium, if any, and (subject to Sections 305 and 307) interest, if any, on such Security and for all other purposes whatsoever, whether or not such Security be overdue, and none of the Company, the Trustee or any agent of the Company or the Trustee shall be affected by notice to the contrary.

Members of, or participants in, the Depositary (“Participants”) shall have no rights under this Indenture with respect to any Global Securities held on their behalf of the Depositary, or the Trustee as its custodian, or under the Global Securities, and the Depositary may be treated by the Company, the Trustee and any agent of the Company or the Trustee as the absolute owner of Global Security for all purposes whatsoever. None of the Company, the

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Trustee, any Paying Agent, any Security Registrar or any other agent of the Company or any agent of 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 Security in the form of a Global Security or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests. The Company, the Trustee, any Paying Agent and any Security Registrar and any other agent of the Company and any agent of the Trustee shall be entitled to deal with any depositary (including any Depositary), and any nominee thereof, that is the Holder of any such Global Security for all purposes of this Indenture relating to such Global Security (including the payment of principal, premium, if any, and interest and Additional Amounts, if any, and the giving of instructions or directions by or to the owner or holder of a beneficial ownership interest in such Global Security) as the sole Holder of such Global Security and shall have no obligations to the beneficial owners thereof. None of the Company, the Trustee, any Paying Agent, any Security Registrar or any other agent of the Company or any agent of the Trustee shall have any responsibility or liability for any acts or omissions of any such depositary with respect to such Global Security, for the records of any such depositary, including records in respect of beneficial ownership interests in respect of any such Global Security, for any transactions between such depositary and any participant in such depositary or between or among any such depositary, any such participant and/or any holder or owner of a beneficial interest in such Global Security or for any transfers of beneficial interests in any such Global Security.

Notwithstanding the foregoing, with respect to any Global Security, nothing herein shall prevent the Company, the Trustee, or any agent of the Company or the Trustee, from giving effect to any written certification, proxy or other authorization furnished by any depositary, as a Holder, with respect to such Global Security or impair, as between such depositary and owners of beneficial interests in such Global Security, the operation of customary practices governing the exercise of the rights of such depositary as a Holder of such Global Security.

Section 309. Cancellation by Security Registrar

All Securities surrendered for payment, redemption, registration of transfer or exchange shall, if surrendered to any Person other than the Security Registrar, be delivered to the Security Registrar and, if not theretofore canceled, shall be promptly canceled by the Security Registrar. The Company may at any time deliver to the Security Registrar for cancellation any Securities previously authenticated and delivered hereunder which the Company may have acquired in any manner whatsoever or which the Company shall not have issued and sold, and all Securities so delivered shall be promptly canceled by the Security Registrar. No Securities shall be authenticated in lieu of or in exchange for any Securities canceled as provided in this Section, except as expressly permitted by this Indenture. All canceled Securities held by the Security Registrar shall be disposed of in accordance with the customary practices of the Security Registrar at the time in effect, and the Security Registrar shall not be required to destroy any such certificates. The Security Registrar shall promptly deliver a certificate of disposition to the Trustee and the Company unless, by a Company Order, delivered to the Security Registrar and Trustee, the Company shall direct that canceled Securities be returned to it. The Security Registrar shall promptly deliver evidence of any cancellation of a Security in accordance with this Section 309 to the Trustee and the Company.

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Section 310. Computation of Interest

Except as otherwise specified as contemplated by Section 301 for Securities of any series, or any Tranche thereof, interest on the Securities of each series shall be computed on the basis of a 360-day year consisting of twelve 30-day months and for any period shorter than a full month on the basis of the actual number of days elapsed within any such period.

Section 311. Extension of Interest Payment, Deferral of Interest Payment

The Company shall have the right at any time, so long as no Event of Default shall have occurred and be continuing with respect to the Securities of any series hereunder, to extend interest payment periods or to defer the payment of interest on all Securities of one or more series, or Tranches thereof, if so specified as contemplated by Section 301 with respect to such Securities and upon such terms as may be specified as contemplated by Section 301 with respect to such Securities.

Section 312. Payment to Be in Proper Currency

In the case of the Securities of any series, or any Tranche thereof, denominated in any currency other than Dollars or in a composite currency (the “Required Currency”), except as otherwise specified with respect to such Securities as contemplated by Section 301, the obligation of the Company to make any payment of the principal thereof, or the premium or interest thereon, shall not be discharged or satisfied by any tender by the Company, or recovery by the Trustee, in any currency other than the Required Currency, except to the extent that such tender or recovery shall result in the Trustee timely holding the full amount of the Required Currency then due and payable. If any such tender or recovery is in a currency other than the Required Currency, the Trustee may take such actions as it considers appropriate to exchange such currency for the Required Currency. The costs and risks of any such exchange, including without limitation the risks of delay and exchange rate fluctuation, shall be borne by the Company, the Company shall remain fully liable for any shortfall or delinquency in the full amount of Required Currency then due and payable, and in no circumstances shall the Trustee be liable therefor except in the case of its negligence or willful misconduct.

ARTICLE 4

Redemption of Securities

Section 401. Applicability of Article

Securities of any series, or any Tranche thereof, which are redeemable before their Stated Maturity shall be redeemable in accordance with their terms and (except as otherwise specified as contemplated by Section 301 for Securities of such series or Tranche) in accordance with this Article.

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Section 402. Election to Redeem; Notice to Trustee

The election of the Company to redeem any Securities shall be evidenced by an Officer’s Certificate. The Company shall, at least 45 days prior to the Redemption Date fixed by the Company (unless a shorter notice shall be satisfactory to the Trustee), notify the Trustee in writing of such Redemption Date and of the principal amount of such Securities to be redeemed. In the case of any redemption of Securities (a) prior to the expiration of any restriction on such redemption provided in the terms of such Securities or elsewhere in this Indenture or (b) pursuant to an election of the Company which is subject to a restriction or condition specified in the terms of such Securities, the Company shall furnish the Trustee with an Officer’s Certificate evidencing compliance with such restriction or condition.

Section 403. Selection of Securities to Be Redeemed

If less than all the Securities of any series, or any Tranche thereof, are to be redeemed, the particular Securities to be redeemed shall be selected by the Trustee from the Outstanding Securities of such series or Tranche not previously called for redemption, by such method as shall be provided for any particular series or Tranche, or, in the absence of any such provision, by such method as the Trustee shall deem fair and appropriate and which may, in any case, provide for the selection for redemption of portions (equal to the minimum authorized denomination for Securities of such series or Tranche or any integral multiple thereof) of the principal amount of Securities of such series or Tranche of a denomination larger than the minimum authorized denomination for Securities of such series or Tranche; provided, however, that if, as indicated in an Officer’s Certificate, the Company shall have offered to purchase all or any principal amount of the Securities then Outstanding of any series, or any Tranche thereof, and less than all of such Securities as to which such offer was made shall have been tendered to the Company for such purchase, the Trustee, if so directed by Company Order, shall select for redemption all or any principal amount of such Securities which have not been so tendered.

The Trustee shall promptly notify the Company and the Security Registrar in writing of the Securities selected for redemption and, in the case of any Securities selected to be redeemed in part, the principal amount thereof to be redeemed.

For all purposes of this Indenture, unless the context otherwise requires, all provisions relating to the redemption of Securities shall relate, in the case of any Securities redeemed or to be redeemed only in part, to the portion of the principal amount of such Securities which has been or is to be redeemed.

Section 404. Notice of Redemption

Except as otherwise specified as contemplated by Section 301 for Securities of any series, notice of redemption shall be given in the manner provided in Section 106 to the Holders of the Securities to be redeemed not less than 30 nor more than 60 days prior to the Redemption Date.

Except as otherwise specified as contemplated by Section 301 for Securities of any series, all notices of redemption shall state:

(a) the Redemption Date,

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(b) the Redemption Price (if known) or the formula pursuant to which the Redemption Price is to be determined if the Redemption Price cannot be determined at the time the notice is given,

(c) if less than all the Securities of any series or Tranche are to be redeemed, the identification of the particular Securities to be redeemed and the portion of the principal amount of any Security to be redeemed in part,

(d) that on the Redemption Date the Redemption Price, together with accrued interest, if any, and Additional Amounts, if any, to the Redemption Date, will become due and payable upon each such Security to be redeemed and, if applicable, that interest and Additional Amounts, if any, thereon will cease to accrue on and after said date,

(e) the place or places where such Securities are to be surrendered for payment of the Redemption Price and accrued interest, if any, and Additional Amounts, if any, unless it shall have been specified as contemplated by Section 301 with respect to such Securities that such surrender shall not be required,

(f) that the redemption is for a sinking or other fund, if such is the case,

(g) the CUSIP, ISIN or other similar numbers, if any, assigned to such Securities; provided, however, that such notice may state that no representation is made as to the correctness of CUSIP, ISIN or other similar numbers, in which case none of the Company, the Trustee or any agent of the Company or the Trustee shall have any liability in respect of the use of any CUSIP, ISIN or other similar number or numbers on such notices, and the redemption of such Securities shall not be affected by any defect in or omission of such numbers, and

(h) such other matters as the Company shall deem desirable or appropriate.

Unless otherwise specified with respect to any Securities in accordance with Section 301, with respect to any notice of redemption of Securities at the election of the Company, unless, upon the giving of such notice, such Securities shall be deemed to have been paid in accordance with Section 701, such notice may state that such redemption shall be conditional upon the receipt by the Paying Agent or Agents for such Securities, on or prior to the date fixed for such redemption, of money sufficient to pay the principal of and premium, if any, and interest, if any, and Additional Amounts, if any, on such Securities and that if such money shall not have been so received such notice shall be of no force or effect and the Company shall not be required to redeem such Securities. In the event that such notice of redemption contains such a condition and such money is not so received, the redemption shall not be made and within a reasonable time thereafter notice shall be given, in the manner in which the notice of redemption was given, that such money was not so received and such redemption was not required to be made, and the Paying Agent or Agents for the Securities otherwise to have been redeemed shall promptly return to the Holders thereof any of such Securities which had been surrendered for payment upon such redemption.

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Notice of redemption of Securities to be redeemed at the election of the Company, and any notice of non-satisfaction of a condition for redemption as aforesaid, shall be given by the Company or, at the Company’s request, by the Security Registrar in the name and at the expense of the Company. Notice of any mandatory redemption of Securities shall be given by the Security Registrar in the name and at the expense of the Company.

Section 405. Securities Payable on Redemption Date

Notice of redemption having been given as aforesaid, and the conditions, if any, set forth in such notice having been satisfied, the Securities or portions thereof so to be redeemed shall, on the Redemption Date, become due and payable at the Redemption Price therein specified, and from and after such date (unless, in the case of an unconditional notice of redemption, the Company shall default in the payment of the Redemption Price and accrued interest and Additional Amounts, if any) such Securities or portions thereof, if interest-bearing, shall cease to bear interest. Upon surrender of any such Security for redemption in accordance with such notice, such Security or portion thereof shall be paid by the Company at the Redemption Price, together with accrued interest and Additional Amounts, if any, to the Redemption Date; provided, however, that no such surrender shall be a condition to such payment if so specified as contemplated by Section 301 with respect to such Security; and provided, further, that except as otherwise specified as contemplated by Section 301 with respect to such Security, any installment of interest on any Security the Stated Maturity of which installment is on or prior to the Redemption Date shall be payable to the Holder of such Security, or one or more Predecessor Securities, registered as such at the close of business on the related Regular Record Date according to the terms of such Security and subject to the provisions of Section 307.

Section 406. Securities Redeemed in Part

Upon the surrender of any Security which is to be redeemed only in part at a Place of Payment therefor (with, if the Company or the Trustee so requires, due endorsement by, or a written instrument of transfer in form satisfactory to the Company and the Trustee duly executed by, the Holder thereof or his attorney duly authorized in writing), the Company shall execute, and the Trustee shall authenticate and deliver to the Holder of such Security, without service charge, a new Security or Securities of the same series and Tranche, of any authorized denomination requested by such Holder and of like tenor and in aggregate principal amount equal to and in exchange for the unredeemed portion of the principal of the Security so surrendered.

ARTICLE 5

Sinking Funds

Section 501. Applicability of Article

The provisions of this Article shall be applicable to any sinking fund for the retirement of the Securities of any series, or any Tranche thereof, except as otherwise specified as contemplated by Section 301 for Securities of such series or Tranche.

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The minimum amount of any sinking fund payment provided for by the terms of Securities of any series, or any Tranche thereof, is herein referred to as a “mandatory sinking fund payment”, and any payment in excess of such minimum amount provided for by the terms of Securities of any series, or any Tranche thereof, is herein referred to as an “optional sinking fund payment”. If provided for by the terms of Securities of any series, or any Tranche thereof, the cash amount of any sinking fund payment may be subject to reduction as provided in Section 502. Each sinking fund payment shall be applied to the redemption of Securities of the series or Tranche in respect of which it was made as provided for by the terms of such Securities.

Section 502. Satisfaction of Sinking Fund Payments with Securities

The Company (a) may deliver to the Trustee Outstanding Securities (other than any previously called for redemption) of a series or Tranche in respect of which a mandatory sinking fund payment is to be made and (b) may apply as a credit Securities of such series or Tranche which have been (i) redeemed either at the election of the Company pursuant to the terms of such Securities or through the application of permitted optional sinking fund payments pursuant to the terms of such Securities or (ii) repurchased by the Company in the open market, by tender offer, in the open market or by private agreement, or otherwise, in each case in satisfaction of all or any part of such mandatory sinking fund payment with respect to the Securities of such series or Tranche; provided, however, that no Securities shall be applied in satisfaction of a mandatory sinking fund payment if such Securities shall have been previously so applied. Securities so applied shall be received and credited for such purpose by the Trustee at the Redemption Price specified in such Securities for redemption through operation of the sinking fund and the amount of such mandatory sinking fund payment shall be reduced accordingly.

Section 503. Redemption of Securities for Sinking Fund

Not less than 45 days prior to each sinking fund payment date for the Securities of any series, or any Tranche thereof, the Company shall deliver to the Trustee an Officer’s Certificate specifying:

(a) the amount of the next succeeding mandatory sinking fund payment for such series or Tranche;

(b) the amount, if any, of the optional sinking fund payment to be made together with such mandatory sinking fund payment;

(c) the aggregate sinking fund payment;

(d) the portion, if any, of such aggregate sinking fund payment which is to be satisfied by the payment of cash; and

(e) the portion, if any, of such aggregate sinking fund payment which is to be satisfied by delivering and crediting Securities of such series or Tranche pursuant to Section 502 and stating the basis for such credit and that such Securities have not previously been so credited, and the Company shall also deliver to the Trustee any Securities to be so delivered.

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If the Company shall have not delivered such Officer’s Certificate and, to the extent applicable, all such Securities, the next succeeding sinking fund payment for such series or Tranche shall be made entirely in cash in the amount of the mandatory sinking fund payment. Not less than 30 days before each such sinking fund payment date the Trustee shall select the Securities to be redeemed upon such sinking fund payment date in the manner specified in Section 403 and cause notice of the redemption thereof to be given in the name of and at the expense of the Company in the manner provided in Section 404. Such notice having been duly given, the redemption of such Securities shall be made upon the terms and in the manner stated in Sections 405 and 406.

ARTICLE 6

Covenants

Section 601. Payment of Principal, Premium and Interest

The Company shall pay the principal of and premium, interest and Additional Amounts, if any, on the Securities of each series in accordance with the terms of such Securities and this Indenture.

Section 602. Maintenance of Office or Agency

The Company shall maintain in each Place of Payment for the Securities of each series, or any Tranche thereof, an office or agency where payment of such Securities shall be made, where the registration of transfer or exchange of such Securities may be effected and where notices and demands to or upon the Company in respect of such Securities and this Indenture may be served. The Company shall give prompt written notice to the Trustee of the location, and any change in the location, of each such office or agency and prompt notice to the Holders of any such change in the manner specified in Section 106. If at any time the Company shall fail to maintain any such required office or agency in respect of Securities of any series, or any Tranche thereof, or shall fail to furnish the Trustee with the address thereof, payment of such Securities shall be made, registration of transfer or exchange thereof may be effected and notices and demands in respect thereof may be served at the Corporate Trust Office of the Trustee, and the Company hereby appoints the Trustee as its agent for all such purposes in any such event.

The Company may also from time to time designate one or more other offices or agencies with respect to the Securities of one or more series, or any Tranche thereof, for any or all of the foregoing purposes and may from time to time rescind such designations; provided, however, that, unless otherwise specified as contemplated by Section 301 with respect to the Securities of such series or Tranche, no such designation or rescission shall in any manner relieve the Company of its obligation to maintain an office or agency for such purposes in each Place of Payment for such Securities in accordance with the requirements set forth above. The Company shall give prompt written notice to the Trustee, and prompt notice to the Holders in the manner specified in Section 106, of any such designation or rescission and of any change in the location of any such other office or agency.

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Anything herein to the contrary notwithstanding, unless otherwise specified as contemplated by Section 301 for the Securities of any series, any office or agency required by this Section may be maintained at an office of the Company or an Affiliate of the Company, in which event the Company or such Affiliate, as the case may be, shall perform all functions to be performed at such office or agency.

Section 603. Money for Securities Payments to Be Held in Trust

If the Company shall at any time act as its own Paying Agent with respect to the Securities of any series, or any Tranche thereof, it shall, on or before each due date of the principal of or premium, interest or Additional Amounts, if any, on any of such Securities, segregate and hold in trust for the benefit of the Persons entitled thereto a sum sufficient to pay the principal, premium, interest or Additional Amounts so becoming due until such sums shall be paid to such Persons or otherwise disposed of as herein provided. The Company shall promptly notify the Trustee of any failure by the Company (or any other obligor on such Securities) to make any payment of principal of or premium, interest or Additional Amounts, if any, on such Securities.

Whenever the Company shall have one or more Paying Agents for the Securities of any series, or any Tranche thereof, it shall, on or before each due date of the principal of or premium, interest or Additional Amounts, if any, on such Securities, deposit with such Paying Agents sums sufficient (without duplication) to pay the principal, premium, interest or Additional Amounts so becoming due, such sums to be held in trust for the benefit of the Persons entitled to such principal, premium, interest or Additional Amounts, and (unless such Paying Agent is the Trustee) the Company shall promptly notify the Trustee of any failure by it so to act.

The Company shall cause each Paying Agent for the Securities of any series, or any Tranche thereof, other than the Company or the Trustee, to execute and deliver to the Trustee an instrument in which such Paying Agent shall agree with the Trustee, subject to the provisions of this Section, that such Paying Agent shall:

(a) hold all sums held by it for the payment of the principal of or premium, interest or Additional Amounts, if any, on such Securities in trust for the benefit of the Persons entitled thereto until such sums shall be paid to such Persons or otherwise disposed of as herein provided;

(b) give the Trustee notice of any failure by the Company (or any other obligor upon such Securities) to make any payment of principal of or premium, interest or Additional Amounts, if any, on such Securities; and

(c) at any time during the continuance of any such failure, upon the written request of the Trustee, forthwith pay to the Trustee all sums so held in trust by such Paying Agent and furnish to the Trustee such information as it possesses regarding the names and addresses of the Persons entitled to such sums.

The Company may at any time pay, or by Company Order direct any Paying Agent to pay, to the Trustee all sums held in trust by the Company or such Paying Agent, such sums to be held by the Trustee upon the same trusts as those upon which such sums were held by

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the Company or such Paying Agent and, if so stated in a Company Order delivered to the Trustee, in accordance with the provisions of Article Seven; and, upon such payment by any Paying Agent to the Trustee, such Paying Agent shall be released from all further liability with respect to such money.

Any money deposited with the Trustee or any Paying Agent, or then held by the Company, in trust for the payment of the principal of and premium, interest or Additional Amounts, if any, on any Security and remaining unclaimed for two years after such principal or premium, interest or Additional Amounts, if any, have become due and payable shall to the extent permitted by law be paid to the Company on Company Request, or, if then held by the Company, shall be discharged from such trust; and, upon such payment or discharge, the Holder of such Security shall, as an unsecured general creditor and not as the Holder of an Outstanding Security, look only to the Company for payment of the amount so due and payable and remaining unpaid unless the applicable law provides otherwise, and all liability of the Trustee or such Paying Agent with respect to such trust money, and all liability of the Company as trustee thereof, shall thereupon cease; provided, however, that the Trustee or such Paying Agent, before being required to make any such payment to the Company, may at the expense of the Company cause to be mailed, on one occasion only, notice to such Holder that such money remains unclaimed and that, after a date specified therein, which shall not be less than 30 days from the date of such mailing, any unclaimed balance of such money then remaining will be paid to the Company.

Section 604. Corporate Existence

Subject to the rights of the Company under Article Eleven, the Company shall do or cause to be done all things necessary to preserve and keep in full force and effect its existence as a corporation.

Section 605. Maintenance of Properties

The Company shall cause (or, with respect to property owned in common with others, make reasonable effort to cause) all of its properties used or useful in the conduct of its business to be maintained and kept in good condition, repair and working order and shall cause (or, with respect to property owned in common with others, make reasonable effort to cause) to be made all necessary repairs, renewals, replacements, betterments and improvements thereof, all as, in the judgment of the Company, may be necessary so that the business carried on in connection therewith may be properly conducted; provided, however, that nothing in this Section shall prevent the Company from discontinuing, or causing the discontinuance of, the operation and maintenance of any of its properties if such discontinuance is, in the judgment of the Company, desirable in the conduct of its business.

Section 606. Annual Officer’s Certificate as to Compliance.

Not later than November 1st in each year, commencing November 1, 2017, the Company shall deliver to the Trustee an Officer’s Certificate, which need not comply with Section 102, executed by the principal executive officer, the principal financial officer or the principal accounting officer of the Company, as to such officer’s knowledge of the Company’s

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compliance with all conditions and covenants under this Indenture, such compliance to be determined without regard to any period of grace or requirement of notice under this Indenture, and if the Company shall be in default, specifying all such defaults and the nature and status thereof of which they may have knowledge, and otherwise complying with the provisions of Section 314(a)(4) of the Trust Indenture Act.

Section 607. Waiver of Certain Covenants

The Company may omit in any particular instance to comply with any term, provision or condition set forth in (a) Section 602 or any additional covenant or restriction specified with respect to the Securities of any series, or any Tranche thereof, as contemplated by Section 301 or by clause (c) of Section 1201, if before the time for such compliance the Holders of a majority in aggregate principal amount of the Outstanding Securities of all series and Tranches with respect to which compliance with Section 602 or such additional covenant or restriction is to be omitted, considered as one class, shall, by Act of such Holders, either waive such compliance in such instance or generally waive compliance with such term, provision or condition and (b) Section 605 or Article Eleven if before the time for such compliance the Holders of a majority in aggregate principal amount of Securities Outstanding under this Indenture shall, by Act of such Holders, either waive such compliance in such instance or generally waive compliance with such term, provision or condition; but, in the case of (a) or (b), no such waiver shall extend to or affect such term, provision or condition except to the extent so expressly waived, and, until such waiver shall become effective, the obligations of the Company and the duties of the Trustee in respect of any such term, provision or condition shall remain in full force and effect.

Section 608. Calculation of Original Issue Discount.

The Company shall file with the Trustee as promptly as possible after the end of each calendar year (i) a written notice specifying the amount of original issue discount (including daily rates and accrual periods) accrued on Outstanding Securities as of the end of such year and (ii) such other specific information relating to such original issue discount as may then be relevant under the Internal Revenue Code of 1986, as amended from time to time.

ARTICLE 7

Defeasance; Satisfaction and Discharge

Section 701. Defeasance

Any Security or Securities, or any portion of the principal amount thereof, shall be deemed to have been paid for all purposes of this Indenture, and the entire indebtedness of the Company in respect thereof shall be deemed to have been satisfied and discharged, if there shall have been irrevocably deposited with the Trustee or any Paying Agent (other than the Company), in trust:

(a) money in an amount which shall be sufficient, or

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(b) in the case of a deposit made prior to the Maturity of such Securities or portions thereof, Eligible Obligations, which shall not contain provisions permitting the redemption or other prepayment thereof at the option of the issuer thereof, the principal of and the interest on which when due, without any regard to reinvestment thereof, will provide moneys which, together with the money, if any, deposited with or held by the Trustee or such Paying Agent, shall be sufficient, or

(c) a combination of (a) or (b) which shall be sufficient,

(d) to pay when due the principal of and premium, interest and Additional Amounts, if any, due and to become due on such Securities or portions thereof on or prior to Maturity; provided, however, that in the case of the provision for payment or redemption of less than all the Securities of any series or Tranche, such Securities or portions thereof shall have been selected by the Security Registrar as provided herein and, in the case of a redemption, the notice requisite to the validity of such redemption shall have been given or irrevocable authority shall have been given by the Company to the Trustee to give such notice, under arrangements satisfactory to the Trustee; and provided, further, that the Company shall have delivered to the Trustee and such Paying Agent:

(x) if such deposit shall have been made prior to the Maturity of such Securities, a Company Order stating that the money and Eligible Obligations deposited in accordance with this Section shall be held in trust, as provided in Section 703; and

(y) if Eligible Obligations shall have been deposited, an Opinion of Counsel that the obligations so deposited constitute Eligible Obligations and do not contain provisions permitting the redemption or other prepayment at the option of the issuer thereof, and an opinion of an independent public accountant of nationally recognized standing, selected by the Company, to the effect that the requirements set forth in clause (b) above have been satisfied; and

(z) if such deposit shall have been made prior to the Maturity of such Securities, an Officer’s Certificate stating the Company’s intention that, upon delivery of such Officer’s Certificate, its indebtedness in respect of such Securities or portions thereof will have been satisfied and discharged as contemplated in this Section.

Upon the deposit of money or Eligible Obligations, or both, in accordance with this Section, together with the documents required by clauses (x), (y) and (z) above, the Trustee shall, upon receipt of a Company Request, acknowledge in writing that the Security or Securities or portions thereof with respect to which such deposit was made are deemed to have been paid for all purposes of this Indenture and that the entire indebtedness of the Company in respect thereof has been satisfied and discharged as contemplated in this Section. In the event that all of the conditions set forth in the preceding paragraph shall have been satisfied in respect of any Securities or portions thereof except that, for any reason, the Officer’s Certificate specified in clause (z), shall not have been delivered, such Securities or portions thereof shall nevertheless be deemed to have been paid for all purposes of this Indenture, and the Holders of such Securities or portions thereof shall nevertheless be no longer entitled to the benefits of this Indenture or of any of the covenants of the Company under Article Six (except the covenants contained in Sections

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602 and 603) or any other covenants made in respect of such Securities or portions thereof as contemplated by Section 301 or Section 1201(c), but the indebtedness of the Company in respect of such Securities or portions thereof shall not be deemed to have been satisfied and discharged prior to Maturity for any other purpose, and the Holders of such Securities or portions thereof shall continue to be entitled to look to the Company for payment of the indebtedness represented thereby; and, upon Company Request, the Trustee shall acknowledge in writing that such Securities or portions thereof are deemed to have been paid for all purposes of this Indenture.

If payment at Stated Maturity of less than all of the Securities of any series, or any Tranche thereof, is to be provided for in the manner and with the effect provided in this Section, the Security Registrar shall select such Securities, or portions of principal amount thereof, in the manner specified by Section 403 for selection for redemption of less than all the Securities of a series or Tranche.

In the event that Securities which shall be deemed to have been paid for purposes of this Indenture, and, if such is the case, in respect of which the Company’s indebtedness shall have been satisfied and discharged, all as provided in this Section do not mature and are not to be redeemed within the 60 day period commencing with the date of the deposit of moneys or Eligible Obligations, as aforesaid, the Company shall, as promptly as practicable, give a notice, in the same manner as a notice of redemption with respect to such Securities, to the Holders of such Securities to the effect that such deposit has been made and the effect thereof.

Notwithstanding that any Securities shall be deemed to have been paid for purposes of this Indenture, as aforesaid, the obligations of the Company and the Trustee in respect of such Securities under Sections 304, 305, 306, 404, 503 (as to notice of redemption), 602, 603, 907, 909, 910 and 915 and this Article Seven shall survive.

The Company shall pay, and shall indemnify the Trustee or any Paying Agent with which Eligible Obligations shall have been deposited as provided in this Section against, any tax, fee or other charge imposed on or assessed against such Eligible Obligations or the principal or interest received in respect of such Eligible Obligations, including, but not limited to, any such tax payable by any entity deemed, for tax purposes, to have been created as a result of such deposit.

Anything herein to the contrary notwithstanding, (a) if, at any time after a Security would be deemed to have been paid for purposes of this Indenture, and, if such is the case, the Company’s indebtedness in respect thereof would be deemed to have been satisfied or discharged, pursuant to this Section (without regard to the provisions of this paragraph), the Trustee or any Paying Agent, as the case may be, shall be required to return the money or Eligible Obligations, or combination thereof, deposited with it as aforesaid to the Company or its representative under any applicable bankruptcy, insolvency or other similar law, such Security shall thereupon be deemed retroactively not to have been paid and any satisfaction and discharge of the Company’s indebtedness in respect thereof shall retroactively be deemed not to have been effected, and such Security shall be deemed to remain Outstanding and (b) any satisfaction and discharge of the Company’s indebtedness in respect of any Security shall be subject to the provisions of the last paragraph of Section 603.

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Section 702. Satisfaction and Discharge of Indenture

This Indenture shall upon Company Request cease to be of further effect (except as hereinafter expressly provided), and the Trustee, at the expense of the Company, shall execute proper instruments acknowledging satisfaction and discharge of this Indenture, when

(a) no Securities remain Outstanding hereunder; and

(b) the Company has paid or caused to be paid all other sums payable hereunder by the Company;

provided, however, that if, in accordance with the last paragraph of Section 701, any Security, previously deemed to have been paid for purposes of this Indenture, shall be deemed retroactively not to have been so paid, this Indenture shall thereupon be deemed retroactively not to have been satisfied and discharged, as aforesaid, and to remain in full force and effect, and the Company shall execute and deliver such instruments as the Trustee shall reasonably request to evidence and acknowledge the same.

Notwithstanding the satisfaction and discharge of this Indenture as aforesaid, the obligations of the Company and the Trustee under Sections 304, 305, 306, 404, 503 (as to notice of redemption), 602, 603, 907, 909, 910 and 915 and this Article Seven shall survive.

Upon satisfaction and discharge of this Indenture as provided in this Section, the Trustee shall upon Company Request, assign, transfer and turn over to the Company, subject to the lien provided by Section 907, any and all money, securities and other property then held by the Trustee for the benefit of the Holders of the Securities other than money and Eligible Obligations held by the Trustee pursuant to Section 703 and shall execute and deliver to the Company such instruments as, in the judgment of the Company, shall be necessary, desirable or appropriate to effect or evidence the satisfaction and discharge of this Indenture.

Section 703. Application of Trust Money

Neither the Eligible Obligations nor the money deposited pursuant to Section 701, nor the principal or interest payments on any such Eligible Obligations, shall be withdrawn or used for any purpose other than, and shall be held in trust for, the payment of the principal of and premium, interest and Additional Amounts, if any, on the Securities or portions of principal amount thereof in respect of which such deposit was made, all subject, however, to the provisions of Section 603; provided, however, that, so long as there shall not have occurred and be continuing an Event of Default, any cash received from such principal or interest payments on such Eligible Obligations, if not then needed for such purpose, shall, to the extent practicable, and upon Company Request, be invested in Eligible Obligations of the type described in clause (b) in the first paragraph of Section 701 maturing at such times and in such amounts as shall be sufficient together with any other moneys and the principal and interest on any other Eligible Obligations then held by the Trustee to pay when due the principal of and premium, if any, and interest and Additional Amounts, if any, due and to become due on such Securities or portions thereof on and prior to the Maturity thereof, and interest earned from such reinvestment shall be paid over to the Company as received, free and clear of any trust, lien or pledge under this Indenture except the lien provided by Section 907; and provided, further, that, so long as there

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shall not have occurred and be continuing an Event of Default, any moneys held in accordance with this Section on the Maturity of all such Securities in excess of the amount required to pay the principal of and premium, interest and Additional Amounts, if any, then due on such Securities shall, upon Company Request, be paid over to the Company free and clear of any trust, lien or pledge under this Indenture except the lien provided by Section 907; and provided, further, that if an Event of Default shall have occurred and be continuing, moneys to be paid over to the Company pursuant to this Section shall be held until such Event of Default shall have been waived or cured.

ARTICLE 8

Events of Default; Remedies

Section 801. Events of Default

“Event of Default,” with respect to Securities of any series, means any one of the following events which shall have occurred and be continuing (whatever the reason for such Event of Default and whether it shall be occasioned by the provisions of Article Fifteen, or 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) unless it is either inapplicable to a particular series or it is specifically deleted or modified in or pursuant to the supplemental indenture, or resolution of the Board of Directors, or Officer’s Certificate pursuant to either thereof, establishing such series of Securities or in the form of Security for such series:

(a) default in the payment of any installment of interest upon any of the Securities of such series as and when the same shall become due and payable, and continuance of such default for a period of 30 days;

(b) default in the payment of all or any part of the principal of any of the Securities of such series as and when the same shall become due and payable, either at maturity, upon any redemption, by declaration or otherwise;

(c) default in the performance or breach of any covenant or warranty contained in the Securities of such series or in this Indenture (other than a covenant or warranty a default in whose performance or whose breach is elsewhere in this Section 801 specifically dealt with or which has expressly been included in this Indenture solely for the benefit of one or more series of Securities other than that series), and continuance of such default or breach for a period of 90 days after there has been given, by registered or certified mail, to the Company by the Trustee or to the Company and the Trustee by the Holders of at least 25% in principal amount of the Outstanding Securities of that series, a written notice specifying such default or breach and requiring it to be remedied and stating that such notice is a “Notice of Default” hereunder;

(d) the entry by a court having jurisdiction in the premises of (A) a decree or order for relief in respect of the Company in an involuntary case or proceeding under any applicable federal, state or foreign bankruptcy, liquidation, insolvency, reorganization or

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other similar law or (B) a decree or order (1) adjudging the Company a bankrupt or insolvent, (2) approving as properly filed a petition seeking reorganization, arrangement, adjustment or composition of or in respect of the Company under any applicable federal, state or foreign law, (3) appointing a custodian, receiver, liquidator, assignee, trustee, sequestrator or other similar official of the Company or of any substantial part of its property or (4) ordering the winding up or liquidation of its affairs, and the continuance of any such decree or order for relief or any such other decree or order unstayed and in effect for a period of 90 consecutive days;

(e) the commencement by the Company of a voluntary case or proceeding under any applicable federal, state or foreign bankruptcy, liquidation, insolvency, reorganization or other similar law or of any other case or proceeding to be adjudicated a bankrupt or insolvent, or the consent by it to the entry of a decree or order for relief in respect of the Company in an involuntary case or proceeding under any applicable federal, state or foreign bankruptcy, liquidation, insolvency, reorganization or other similar law or to the commencement of any bankruptcy or insolvency case or proceeding against it, or the filing by it of a petition or answer or consent seeking reorganization or relief under any applicable federal, state or foreign law, or the consent by it to the filing of such petition or to the appointment of or taking possession by a custodian, receiver, liquidator, assignee, trustee, sequestrator or similar official of the Company or of any substantial part of its property, or the making by it of an assignment for the benefit of creditors; or

(f) any other Event of Default provided with respect to Securities of such series in the supplemental indenture or Board Resolution, or Officer’s Certificate pursuant to either thereof, establishing such series.

Section 802. Declaration of Acceleration; Rescission and Annulment

If an Event of Default occurs and is continuing with respect to the Securities of any series, then and in each and every such case, unless the principal of all Securities of such series shall have already become due and payable, either the Trustee for such series or the Holders of not less than 25% in aggregate principal amount at maturity of the Securities of such series then Outstanding, by notice in writing to the Company and to the Trustee if given by such Holders, may declare the principal of all the Securities of such series to be due and payable immediately, and upon any such declaration the same shall become and shall be immediately due and payable.

At any time after such a declaration of acceleration with respect to Securities of any series shall have been made and before a judgment or decree for payment of the money due shall have been obtained by the Trustee as hereinafter in this Article provided, the Event of Default or Events of Default giving rise to such declaration of acceleration shall, without further act, be deemed to have been waived, and such declaration and its consequences shall, without further act, be deemed to have been rescinded and annulled, if

(a) the Company shall have paid or deposited with the Trustee a sum sufficient to pay

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(1) all overdue interest on, or Additional Amounts, if any, with respect to all Securities of such series;

(2) the principal of and premium, if any, on any Securities of such series which have become due otherwise than by such declaration of acceleration and interest thereon at the rate or rates prescribed therefor herein or in such Securities;

(3) to the extent that payment of such interest is lawful, interest upon overdue interest, if any, or upon Additional Amounts, if any, at the rate or rates prescribed therefor herein or in such Securities;

(4) all amounts due to the Trustee under Section 907;

and

(b) any other Event of Default or Events of Default with respect to Securities of such series, other than the nonpayment of the principal of Securities of such series which shall have become due solely by such declaration of acceleration, shall have been cured or waived as provided in Section 813.

No such rescission shall affect any subsequent Event of Default or impair any right consequent thereon.

Section 803. Collection of Indebtedness and Suits for Enforcement by Trustee

If an Event of Default described in clause (a) or (b) of Section 801 shall have occurred and be continuing, the Company shall, upon demand of the Trustee, pay to it, for the benefit of the Holders of the Securities of the series with respect to which such Event of Default shall have occurred, the whole amount then due and payable on such Securities for principal and premium, interest and Additional Amounts, if any, and, to the extent permitted by law, interest on any overdue principal, premium, interest, and Additional Amounts, if any, at the rate or rates prescribed therefor in such Securities, and, in addition thereto, such further amount as shall be sufficient to cover any amounts due to the Trustee under Section 907. Unless otherwise specified pursuant to Section 301 with respect to any series of Securities, the rate or rates at which Securities shall bear interest on overdue principal, premium, interest and Additional Amounts shall be, to the extent permitted by law, the same rate or rates at which such Securities shall bear interest prior to maturity.

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 such Securities 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 such Securities, wherever situated.

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If an Event of Default with respect to Securities of any series shall have occurred and be continuing, the Trustee may in its discretion proceed to protect and enforce its rights and the rights of the Holders of Securities of such series by such appropriate judicial proceedings as the Trustee shall deem most effectual to protect and enforce any such rights, whether for the specific enforcement of any covenant or agreement in this Indenture or in aid of the exercise of any power granted herein, or to enforce any other proper remedy.

Section 804. Trustee May File Proofs of Claim

In case of the pendency of any receivership, insolvency, liquidation, bankruptcy, reorganization, arrangement, adjustment, composition or other judicial proceeding relative to the Company or any other obligor upon the Securities or the property of the Company or of such other obligor or their creditors, the Trustee (irrespective of whether the principal of the Securities 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 on the Company for the payment of overdue principal or interest) shall be entitled and empowered, by intervention in such proceeding or otherwise,

(a) to file and prove a claim for the whole amount of principal, premium, if any, and interest and Additional Amounts, if any, owing and unpaid in respect of the Securities and to file such other papers or documents as may be necessary or advisable in order to have the claims of the Trustee (including any claim for amounts due to the Trustee under Section 907) and of the Holders allowed in such judicial proceeding, and

(b) to collect and receive any moneys or other property payable or deliverable on any such claims and to distribute the same;

and any custodian, receiver, assignee, trustee, liquidator, sequestrator or other similar official in any such judicial proceeding is hereby authorized by each Holder to make such payments to the Trustee 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 amounts due it under Section 907.

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 the Securities 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.

Section 805. Trustee May Enforce Claims Without Possession of Securities

All rights of action and claims under this Indenture or the Securities may be prosecuted and enforced by the Trustee without the possession of any of the Securities or the production thereof in any proceeding relating thereto, and any such 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 in respect of which such judgment has been recovered.

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Section 806. Application of Money Collected

Any money or other property collected or received by the Trustee pursuant to this Article or otherwise distributable in respect of the Company’s obligations under this Indenture in the case of an Event of Default shall be applied in the following order, at the date or dates fixed by the Trustee and, in case of the distribution of such money on account of principal or premium, if any, or interest or Additional Amounts, if any, upon presentation of the Securities in respect of which or for the benefit of which such money shall have been collected and the notation thereon of the payment if only partially paid and upon surrender thereof if fully paid:

First : To the payment of all amounts due the Trustee (including any predecessor Trustee) under Section 907;

Second : Subject to Article Fifteen, to the payment of the amounts then due and unpaid upon the Securities for principal of and premium, if any, and interest and Additional Amounts, if any, in respect of which or for the benefit of which such money has been collected, ratably, without preference or priority of any kind, according to the amounts due and payable on such Securities for principal, premium, if any, and interest and Additional Amounts, if any, respectively; and

Third : To the payment of the remainder, if any, to the Company or to whomsoever may be lawfully entitled to receive the same or as a court of competent jurisdiction may direct.

Section 807. Limitation on Suits

No Holder shall have any right to institute any proceeding, judicial or otherwise, with respect to this Indenture, or for the appointment of a receiver or trustee, or for any other remedy hereunder, unless:

(a) such Holder shall have previously given written notice to the Trustee of a continuing Event of Default with respect to the Securities of such series or Tranche;

(b) the Holders of a majority in aggregate principal amount of the Outstanding Securities of all series in respect of which an Event of Default shall have occurred and be continuing, considered as one class, shall have made written request to the Trustee to institute proceedings in respect of such Event of Default in its own name as Trustee hereunder;

(c) such Holder or Holders shall have offered to the Trustee reasonable indemnity against the costs, expenses and liabilities to be incurred in compliance with such request;

(d) the Trustee for 60 days after its receipt of such notice, request and offer of indemnity shall have failed to institute any such proceeding; and

(e) no direction inconsistent with such written request shall have been given to the Trustee during such 60-day period by the Holders of a majority in aggregate principal amount of the Outstanding Securities of all series in respect of which an Event of Default shall have occurred and be continuing, considered as one class;

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it being understood and intended that no one or more of such 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 of such Holders or to obtain or to seek to obtain priority or preference over any other of such Holders or to enforce any right under this Indenture, except in the manner herein provided and for the equal and ratable benefit of all of such Holders.

Section 808. Unconditional Right of Holders to Receive Principal, Premium and Interest

Notwithstanding any other provision in this Indenture, the Holder of any Security shall have the right, which is absolute and unconditional, to receive payment of the principal of and premium, if any, and (subject to Sections 307 and 311) interest, if any, and Additional Amounts, if any, on such Security on the Stated Maturity or Maturities if any expressed in such Security (or, in the case of redemption, on the Redemption Date) and to institute suit for the enforcement of any such payment, and such rights shall not be impaired without the consent of such Holder.

Section 809. Restoration of Rights and Remedies

If the Trustee or any Holder has instituted any proceeding to enforce any right or remedy under this Indenture and such proceeding shall have been discontinued or abandoned for any reason, or shall have been determined adversely to the Trustee or to such Holder, then and in every such case, subject to any determination in such proceeding, the Company, the Trustee and such Holder shall be restored severally and respectively to their former positions hereunder and thereafter all rights and remedies of the Trustee and such Holder shall continue as though no such proceeding had been instituted.

Section 810. Rights and Remedies Cumulative

Except as otherwise provided in the last paragraph of Section 306, no right or remedy herein conferred upon or reserved to the Trustee or to the Holders is intended to be exclusive of any other right or remedy, and every right and remedy shall, to the extent permitted by law, be cumulative and in addition to every other right and remedy given hereunder or now or hereafter existing at law or in equity or otherwise. The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other appropriate right or remedy.

Section 811. Delay or Omission Not Waiver

No delay or omission of the Trustee or of any Holder to exercise any right or remedy accruing upon any Event of Default shall impair any such right or remedy or constitute a waiver of any such Event of Default or an acquiescence therein. Every right and remedy given by this Article or by law to the Trustee or to the Holders may be exercised from time to time, and as often as may be deemed expedient, by the Trustee or by the Holders, as the case may be.

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Section 812. Control by Holders of Securities

If an Event of Default shall have occurred and be continuing in respect of a series of Securities, the Holders of a majority in principal amount of the Outstanding Securities of such series 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 Securities of such series; provided, however, that if an Event of Default shall have occurred and be continuing with respect to more than one series of Securities, the Holders of a majority in aggregate principal amount of the Outstanding Securities of all such series, considered as one class, shall have the right to make such direction, and not the Holders of the Securities of any one of such series; and provided, further, that

(a) such direction shall not be in conflict with any rule of law or with this Indenture,

(b) the Trustee may take any other action deemed proper by the Trustee which is not inconsistent with any such direction,

(c) subject to the provisions of Section 901, the Trustee shall have the right to decline to follow any such directions if the Trustee in good faith shall, by a Responsible Officer of Officers of the Trustee, determine that the proceeding so directed would involve the Trustee in personal liability; and

(d) the Trustee may take any other action deemed proper by the Trustee which is not inconsistent with such direction.

Before proceeding to exercise any right or power hereunder at the direction of such Holders, the Trustee shall be entitled to receive from such Holders reasonable security or indemnity against the costs, expenses and liabilities which might be incurred by it in compliance with any such direction.

Section 813. Waiver of Past Defaults

The Holders of not less than a majority in principal amount of the Outstanding Securities of any series may on behalf of the Holders of all the Securities of such series waive any past default hereunder with respect to such series and its consequences, except a default

(a) in the payment of the principal of or premium, interest or Additional Amounts, if any, on any Security of such series, or

(b) in respect of a covenant or provision hereof which under Section 1202 cannot be modified or amended without the consent of the Holder of each Outstanding Security of such series affected.

Upon any such waiver, such default shall cease to exist, and any and all Events of Default arising therefrom shall be deemed to have been cured, for every purpose of this Indenture; but no such waiver shall extend to any subsequent or other default or impair any right consequent thereon.

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Section 814. Undertaking for Costs

The Company and the Trustee agree, and each Holder by his 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, suffered 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, 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; but the provisions of this Section shall not apply to any suit instituted by the Company, 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 aggregate principal amount of the Outstanding Securities of all series in respect of which such suit may be brought, considered as one class, or to any suit instituted by any Holder for the enforcement of the payment of the principal of or premium, if any, or interest or Additional Amounts, if any, on any Security on or after the Stated Maturity or Maturities expressed in such Security (or, in the case of redemption, on or after the Redemption Date).

Section 815. Waiver of Stay or Extension Laws

The Company covenants (to the extent that it may lawfully do so) that it will not at any time insist upon, or plead, or in any manner whatsoever claim or take the benefit or advantage of, any stay or extension law wherever enacted, now or at any time hereafter in force, which may affect the covenants or the performance of this Indenture; and the Company (to the extent that it may lawfully do so) hereby expressly waives all benefit or advantage of any such law and covenants that it will not 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.

ARTICLE 9

The Trustee

Section 901. Certain Duties and Responsibilities

(a) Except during the continuance of an Event of Default with respect to the Securities of any series,

(i) the Trustee undertakes to perform, with respect to the Securities of such series, such duties and only such duties as are specifically set forth in this Indenture and the Trust Indenture Act, and no implied covenants or obligations shall be read into this Indenture against the Trustee; and

(ii) in the absence of bad faith on its part, the Trustee may, with respect to the Securities of such series, conclusively rely, as to the truth of the statements and the correctness of the opinions expressed therein, upon 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 which by any provision hereof are specifically required to be furnished to the Trustee, the

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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 mathematical calculations or other facts stated therein).

(b) In case an Event of Default with respect to the Securities of any series has occurred and is continuing, the Trustee shall exercise, with respect to the Securities of such series, such of the rights and powers vested in it by this Indenture, and use the same degree of care and skill in their exercise, as a prudent person would exercise or use under the circumstances in the conduct of his or her own affairs.

(c) No provision of this Indenture shall be construed to relieve the Trustee from liability for its own negligent action, its own negligent failure to act, or its own willful misconduct, except that:

(i) this Subsection shall not be construed to limit the effect of Subsections (a) and (d) of this Section;

(ii) the Trustee shall not be liable for any error of judgment made in good faith by a Responsible Officer, unless it shall be proved that the Trustee was negligent in ascertaining the pertinent facts; and

(iii) 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 a majority in principal amount of the Outstanding Securities of any series 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) No provision of this Indenture shall require the Trustee to expend or risk its own funds or otherwise incur any financial liability in the performance of any of its duties hereunder, or in the exercise of any of its rights or powers, if it shall have reasonable grounds for believing that repayment of such funds or adequate indemnity against such risk or liability is not reasonably assured to it.

(e) Whether or not therein expressly so provided, every provision of this Indenture or relating to the conduct or affecting the liability of or affording protection to the Trustee shall be subject to the provisions of this Section.

Section 902. Notice of Defaults

The Trustee shall give notice of any default hereunder known to the Trustee with respect to the Securities of any series to the Holders of Securities of such series in the manner and to the extent required to do so by the Trust Indenture Act, unless such default shall have been cured or waived; provided, however, that in the case of any default of the character specified in Section 801(c), no such notice to Holders shall be given until at least 45 days after the occurrence thereof.

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For the purpose of this Section and clause (i) of Section 903, the term “default” means any event which is, or after notice or lapse of time, or both, would become, an Event of Default.

Section 903. Certain Rights of Trustee

Subject to the provisions of Section 901:

(a) the Trustee may conclusively rely and shall be fully protected in acting or refraining from acting upon any resolution, certificate, statement, instrument, opinion, report, notice, request, direction, consent, order, bond, debenture, note, other evidence of indebtedness or other paper or document believed by it to be genuine and to have been signed or presented by the proper party or parties;

(b) any request or direction of the Company mentioned herein shall be sufficiently evidenced by a Company Request or Company Order, or as otherwise expressly provided herein, and any resolution of the Board of Directors may be sufficiently evidenced by a Board Resolution;

(c) whenever in the administration of this Indenture the Trustee shall deem it desirable that a matter be proved or established prior to taking, suffering or omitting any action hereunder, the Trustee (unless other evidence be herein specifically prescribed) may, in the absence of bad faith on its part, conclusively rely upon an Officer’s Certificate;

(d) the Trustee may consult with counsel and the written advice of such counsel or any Opinion of Counsel shall be full and complete authorization and protection in respect of any action taken, suffered or omitted by it hereunder in good faith and in reliance thereon;

(e) 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 Holder pursuant to this Indenture, unless such Holder shall have offered to the Trustee reasonable security or indemnity against the costs, expenses and liabilities which might be incurred by it in compliance with such request or direction;

(f) 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, note, other evidence of indebtedness 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 (subject to applicable legal requirements) be entitled to examine, during normal business hours, the books, records and premises of the Company, personally or by agent or attorney;

(g) the Trustee may execute any of the trusts or powers hereunder or perform any duties hereunder either directly or by or through agents or attorneys, and the Trustee shall not be responsible for any misconduct or negligence on the part of any agent or attorney appointed with due care by it hereunder;

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(h) the rights, privileges, protections, immunities and benefits given to the Trustee, including, without limitation, its right to be indemnified, are extended to, and shall be enforceable by, the Trustee in each of its capacities hereunder;

(i) the Trustee shall not be charged with knowledge of any default (as defined in Section 902) or Event of Default with respect to the Securities of any series for which it is acting as Trustee unless either (1) a Responsible Officer of the Trustee shall have actual knowledge that such default or Event of Default, as the case may be, exists and constitutes a default or Event of Default, as the case may be, under this Indenture, or (2) written notice of such default or Event of Default shall have been given in the manner provided in Section 105 hereof to the Trustee by the Company or any other obligor on such Securities or by any Holder of such Securities; and

(j) the Trustee shall not be liable for any action it takes or omits to take in good faith which it believes to be authorized or within its rights or powers conferred upon it under this Indenture.

Section 904. Not Responsible for Recitals or Issuance of Securities

The recitals contained herein and in the Securities (except the Trustee’s certificates of authentication) shall be taken as the statements of the Company, and neither the Trustee nor any Authenticating Agent assumes responsibility for their correctness. The Trustee makes no representations as to the validity or sufficiency of this Indenture or of the Securities. Neither the Trustee nor any Authenticating Agent shall be accountable for the use or application by the Company of Securities or the proceeds thereof.

Section 905. May Hold Securities

Each of the Trustee, any Authenticating Agent, any Paying Agent, any Security Registrar or any other agent of the Company, in its individual or any other capacity, may become the owner or pledgee of Securities and, subject to Sections 908 and 913, may otherwise deal with the Company with the same rights it would have if it were not the Trustee, Authenticating Agent, Paying Agent, Security Registrar or such other agent.

Section 906. Money Held in Trust

Money held by the Trustee in trust hereunder need not be segregated from other funds, except to the extent required by law. The Trustee shall be under no liability for interest on any money received by it hereunder except as expressly provided herein or otherwise agreed with, and for the sole benefit of, the Company.

Section 907. Compensation and Reimbursement

The Company shall

(a) pay to the Trustee from time to time reasonable compensation for all services rendered by it hereunder (which compensation shall not be limited by any provision of law in regard to the compensation of a trustee of an express trust);

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(b) except as otherwise expressly provided herein, reimburse the Trustee upon its request for all reasonable expenses, disbursements and advances reasonably incurred or made by the Trustee in accordance with any provision of this Indenture (including the reasonable compensation and the expenses and disbursements of its agents and counsel), except to the extent that any such expense, disbursement or advance may be attributable to the Trustee’s negligence, willful misconduct or bad faith; and

(c) indemnify the Trustee for and hold it harmless from and against, any loss, liability or expense reasonably incurred by it arising out of or in connection with the acceptance or administration of the trust or trusts hereunder or the performance of its duties hereunder, including the reasonable costs and expenses of defending itself against any claim or liability in connection with the exercise or performance of any of its powers or duties hereunder, except to the extent any such loss, liability or expense may be attributable to its negligence, willful misconduct or bad faith.

As security for the performance of the obligations of the Company under this Section, the Trustee shall have a lien prior to the Securities upon all property and funds held or collected by the Trustee as such other than property and funds held in trust under Section 703 (except as otherwise provided in Section 703).

In addition and without prejudice to the rights provided to the Trustee under any of the provisions of this Indenture, when the Trustee incurs expenses or renders services in connection with an Event of Default specified in Section 801(d) or Section 801(e), the expenses (including the reasonable charges and expenses of its counsel) and the compensation for the services are intended to constitute expenses of administration under any applicable bankruptcy, insolvency or other similar law.

The Company’s obligations under this Section 907 and the lien referred to in this Section 907 shall survive the resignation or removal of the Trustee, the discharge of the Company’s obligations under Article Seven of this Indenture and/or the termination of this Indenture.

“Trustee” for purposes of this Section shall include any predecessor Trustee; provided, however, that the negligence, willful misconduct or bad faith of any Trustee hereunder shall not affect the rights of any other Trustee.

Section 908. Disqualification; Conflicting Interests.

If the Trustee shall have or acquire any conflicting interest within the meaning of the Trust Indenture Act, it shall either eliminate such conflicting interest or resign to the extent, in the manner and with the effect, and subject to the conditions, provided in the Trust Indenture Act and this Indenture. For purposes of Section 310(b)(1) of the Trust Indenture Act and to the extent permitted thereby, the Trustee, in its capacity as trustee in respect of the Securities of any series, shall not be deemed to have a conflicting interest arising from its capacity as trustee in respect of the Securities of any other series issued under this Indenture. Nothing herein shall prevent the Trustee from filing with the Commission the application referred to in the second to last paragraph of Section 310(b) of the Trust Indenture Act.

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Section 909. Corporate Trustee Required; Eligibility

There shall at all times be a Trustee hereunder which shall be

(a) a corporation organized and doing business under the laws of the United States, any State or Territory thereof or the District of Columbia, authorized under such laws to exercise corporate trust powers, having a combined capital and surplus of at least $50,000,000 and subject to supervision or examination by Federal, State authority, or other applicable Governmental Authority, or

(b) if and to the extent permitted by the Commission by rule, regulation or order upon application, a corporation or other Person organized and doing business under the laws of a foreign government, authorized under such laws to exercise corporate trust powers, having a combined capital and surplus of at least $50,000,000 or the Dollar equivalent of the applicable foreign currency and subject to supervision or examination by authority of such foreign government or a political subdivision thereof substantially equivalent to supervision or examination applicable to United States institutional trustees,

and, in either case, qualified and eligible under this Article and the Trust Indenture Act. If such corporation publishes reports of condition at least annually, pursuant to law or to the requirements of such supervising or examining authority, then for the purposes of this Section, the combined capital and surplus of such corporation 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 910. Resignation and Removal; Appointment of Successor

(a) No resignation or removal of the Trustee and no appointment of a successor Trustee pursuant to this Article shall become effective until the acceptance of appointment by the successor Trustee in accordance with the applicable requirements of Section 911.

(b) The Trustee may resign at any time with respect to the Securities of one or more series by giving written notice thereof to the Company. If the instrument of acceptance by a successor Trustee required by Section 911 shall not have been delivered to the Trustee within 30 days after the giving of such notice of resignation, the resigning Trustee may petition any court of competent jurisdiction for the appointment of a successor Trustee with respect to the Securities of such series.

(c) The Trustee may be removed at any time by Act of the Holders of a majority in principal amount of the Outstanding Securities of all series and delivery of such Act to the Trustee and to the Company.

(d) If at any time:

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(1) the Trustee shall fail to comply with Section 908 after written request therefor by the Company or by any Holder who has been a bona fide Holder for at least six months, or

(2) the Trustee shall cease to be eligible under Section 909 or Section 310(a) of the Trust Indenture Act and shall fail to resign after written request therefor by the Company or by any such Holder, or

(3) 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 any such case, (x) the Company by a Board Resolution may remove the Trustee with respect to all Securities or (y) subject to Section 814, any Holder who has been a bona fide Holder for at least six months may, on behalf of himself and all others similarly situated, petition any court of competent jurisdiction for the removal of the Trustee with respect to all Securities and the appointment of a successor Trustee or Trustees.

(e) If the Trustee shall resign, be removed or become incapable of acting, or if a vacancy shall occur in the office of Trustee for any cause (other than as contemplated in clause (y) in subsection (d) of this Section), with respect to the Securities of one or more series, the Company, by a Board Resolution, shall promptly appoint a successor Trustee or Trustees with respect to the Securities of that or those series (it being understood that any such successor Trustee may be appointed with respect to the Securities of one or more or all of such series and that at any time there shall be only one Trustee with respect to the Securities of any particular series) and shall comply with the applicable requirements of Section 911. If, within one year after such resignation, removal or incapability, or the occurrence of such vacancy, a successor Trustee with respect to the Securities of any series shall be appointed by Act of the Holders of a majority in principal amount of the Outstanding Securities of such series delivered to the Company and the retiring Trustee, the successor Trustee so appointed shall, forthwith upon its acceptance of such appointment in accordance with the applicable requirements of Section 911, become the successor Trustee with respect to the Securities of such series and to that extent supersede the successor Trustee appointed by the Company. If no successor Trustee with respect to the Securities of any series shall have been so appointed by the Company or the Holders and accepted appointment in the manner required by Section 911, any Holder who has been a bona fide Holder of a Security of such series for at least six months may, on behalf of itself and all others similarly situated, petition any court of competent jurisdiction for the appointment of a successor Trustee with respect to the Securities of such series.

(f) So long as no event which is, or after notice or lapse of time, or both, would become, an Event of Default shall have occurred and be continuing, and except with respect to a Trustee appointed by Act of the Holders of a majority in principal amount of the Outstanding Securities pursuant to subsection (e) of this Section, if the Company shall have delivered to the Trustee (i) a Board Resolution appointing a

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successor Trustee, effective as of a date specified therein, and (ii) an instrument of acceptance of such appointment, effective as of such date, by such successor Trustee in accordance with Section 911, the Trustee shall be deemed to have resigned as contemplated in subsection (b) of this Section, the successor Trustee shall be deemed to have been appointed by the Company pursuant to subsection (e) of this Section and such appointment shall be deemed to have been accepted as contemplated in Section 911, all as of such date, and all other provisions of this Section and Section 911 shall be applicable to such resignation, appointment and acceptance except to the extent inconsistent with this subsection (f).

(g) The Company (or, should the Company fail so to act promptly, the successor trustee at the expense of the Company) shall give notice of each resignation and each removal of the Trustee with respect to the Securities of any series and each appointment of a successor Trustee with respect to the Securities of any series by mailing written notice of such event by first-class mail, postage prepaid, to all Holders of Securities of such series as their names and addresses appear in the Security Register. Each notice shall include the name of the successor Trustee with respect to the Securities of such series and the address of its corporate trust office.

Section 911. Acceptance of Appointment by Successor

(a) In case of the appointment hereunder of a successor Trustee with respect to the Securities of all series, every such successor Trustee so appointed shall execute, acknowledge and deliver to the Company and to the retiring Trustee an instrument accepting such appointment, and thereupon the resignation or removal of the retiring Trustee shall become effective and such successor Trustee, without any further act, deed or conveyance shall become vested with all the rights, powers, trusts and duties of the retiring Trustee; but, on the request of the Company or the successor Trustee, such retiring Trustee shall, upon payment of all sums owed to it, execute and deliver an instrument transferring to such successor Trustee all the rights, powers and trusts of the retiring Trustee and shall duly assign, transfer and deliver to such successor Trustee all property and money held by such retiring Trustee hereunder, subject nevertheless to its lien provided in Section 907.

(b) In case of the appointment hereunder of a successor Trustee with respect to the Securities of one or more (but not all) series, the Company, the retiring Trustee and each successor Trustee with respect to the Securities of one or more series shall execute and deliver an indenture supplemental hereto wherein each successor Trustee shall accept such appointment and which (1) shall contain such provisions as shall be necessary or desirable to transfer and confirm to, and to vest in, each successor Trustee all the rights, powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series to which the appointment of such successor Trustee relates, (2) if the retiring Trustee is not retiring with respect to all Securities, shall contain such provisions as shall be deemed necessary or desirable to confirm that all the rights, powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series as to which the retiring Trustee is not retiring shall continue to be vested in the retiring Trustee and (3) shall add to or change any of the provisions of this Indenture as shall be necessary to

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provide for or facilitate the administration of the trusts hereunder by more than one Trustee, it being understood that nothing herein or in such supplemental indenture shall constitute such Trustees co-trustees of the same trust and that each such Trustee shall be trustee of a trust or trusts hereunder separate and apart from any trust or trusts hereunder administered by any other such Trustee; and upon the execution and delivery of such supplemental indenture the resignation or removal of the retiring Trustee shall become effective to the extent provided therein and each such successor Trustee, without any further act, deed or conveyance shall become vested with all the rights, powers, trusts and duties of the retiring Trustee with respect to the Securities of that or those series to which the appointment of such successor Trustee relates; but, on request of the Company or any successor Trustee, such retiring Trustee, upon payment of all sums owed to it, shall duly assign, transfer and deliver to such successor Trustee all property and money held by such retiring Trustee hereunder with respect to the Securities of that or those series to which the appointment of such successor Trustee relates, subject nevertheless to its lien provided for in Section 907.

(c) Upon request of any such successor Trustee, the Company shall execute any instruments which fully vest in and confirm to such successor Trustee all such rights, powers and trusts referred to in subsection (a) or (b) of this Section, as the case may be.

(d) No successor Trustee shall accept its appointment unless at the time of such acceptance such successor Trustee shall be qualified and eligible under this Article.

Section 912. Merger, Conversion, Consolidation or Succession to Business

Any Person into which the Trustee may be merged or converted or with which it may be consolidated, or any Person resulting from any merger, conversion or consolidation to which the Trustee shall be a party, or any Person succeeding to all or substantially all the corporate trust business of the Trustee, shall be the successor of the Trustee hereunder, provided such Person shall be otherwise qualified and eligible under this Article, without the execution or filing of any paper or any further act on the part of any of the parties hereto. In case any Securities shall have been authenticated, but not delivered, by the Trustee then in office, any successor by merger, conversion or consolidation to such authenticating Trustee may adopt such authentication and deliver the Securities so authenticated with the same effect as if such successor Trustee had itself authenticated such Securities.

Section 913. Preferential Collection of Claims Against Company

If the Trustee shall be or become a creditor of the Company or any other obligor upon the Securities (other than by reason of a relationship described in Section 311(b) of the Trust Indenture Act), the Trustee shall be subject to the provisions of the Trust Indenture Act regarding the collection of claims against the Company or such other obligor. For purposes of Section 311(b) of the Trust Indenture Act:

(a) the term “cash transaction” means any transaction in which full payment for goods or securities sold is made within seven days after delivery of the goods or securities in currency or in checks or other orders drawn upon banks or bankers and payable upon demand;

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(b) the term “self-liquidating paper” means any draft, bill of exchange, acceptance or obligation which is made, drawn, negotiated or incurred by the Company for the purpose of financing the purchase, processing, manufacturing, shipment, storage or sale of goods, wares or merchandise and which is secured by documents evidencing title to, possession of, or a lien upon, the goods, wares or merchandise or the receivables or proceeds arising from the sale of the goods, wares or merchandise previously constituting the security, provided the security is received by the Trustee simultaneously with the creation of the creditor relationship with the Company arising from the making, drawing, negotiating or incurring of the draft, bill of exchange, acceptance or obligation.

Section 914. Co-trustees and Separate Trustees.

At any time or times, for the purpose of meeting the legal requirements of any applicable jurisdiction, the Company and the Trustee shall have power to appoint, and, upon the written request of the Trustee or of the Holders of at least 33% in principal amount of the Securities then Outstanding, the Company shall for such purpose join with the Trustee in the execution and delivery of all instruments and agreements necessary or proper to appoint, one or more Persons approved by the Trustee either to act as co-trustee, jointly with the Trustee, or to act as separate trustee, in either case with such powers as may be provided in the instrument of appointment, and to vest in such Person or Persons, in the capacity aforesaid, any property, title, right or power deemed necessary or desirable, subject to the other provisions of this Section. If the Company does not join in such appointment within 15 days after the receipt by it of a request so to do, or if an Event of Default shall have occurred and be continuing, the Trustee alone shall have power to make such appointment.

Should any written instrument or instruments from the Company be required by any co-trustee or separate trustee so appointed to more fully confirm to such co-trustee or separate trustee such property, title, right or power, any and all such instruments shall, on request, be executed, acknowledged and delivered by the Company.

Every co-trustee or separate trustee shall, to the extent permitted by law, but to such extent only, be appointed subject to the following conditions:

(a) the Securities shall be authenticated and delivered, and all rights, powers, duties and obligations hereunder in respect of the custody of securities, cash and other personal property held by, or required to be deposited or pledged with, the Trustee hereunder, shall be exercised solely, by the Trustee;

(b) the rights, powers, duties and obligations hereby conferred or imposed upon the Trustee in respect of any property covered by such appointment shall be conferred or imposed upon and exercised or performed either by the Trustee or by the Trustee and such co-trustee or separate trustee jointly, as shall be provided in the instrument appointing such co-trustee or separate trustee, except to the extent that under any law of any jurisdiction in which any particular act is to be performed, the Trustee shall be incompetent or unqualified to perform such act, in which event such rights, powers, duties and obligations shall be exercised and performed by such co-trustee or separate trustee;

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(c) the Trustee at any time, by an instrument in writing executed by it, with the concurrence of the Company, may accept the resignation of or remove any co-trustee or separate trustee appointed under this Section, and, if an Event of Default shall have occurred and be continuing, the Trustee shall have power to accept the resignation of, or remove, any such co-trustee or separate trustee without the concurrence of the Company. Upon the written request of the Trustee, the Company shall join with the Trustee in the execution and delivery of all instruments and agreements necessary or proper to effectuate such resignation or removal. A successor to any co-trustee or separate trustee so resigned or removed may be appointed in the manner provided in this Section;

(d) no co-trustee or separate trustee hereunder shall be personally liable by reason of any act or omission of the Trustee, or any other such trustee hereunder, and the Trustee shall not be personally liable by reason of any act or omission of any such co-trustee or separate trustee; and

(e) any Act of Holders delivered to the Trustee shall be deemed to have been delivered to each such co-trustee and separate trustee.

Section 915. Appointment of Authenticating Agent

The Trustee may appoint an Authenticating Agent or Agents with respect to the Securities of one or more series, or any Tranche thereof, which shall be authorized to act on behalf of the Trustee to authenticate Securities of such series or Tranche issued upon original issuance, exchange, registration of transfer or partial redemption thereof or pursuant to Section 306, and Securities so authenticated shall be entitled to the benefits of this Indenture and shall be valid and obligatory for all purposes as if authenticated by the Trustee hereunder. Wherever reference is made in this Indenture to the authentication and delivery of Securities by the Trustee or the Trustee’s certificate of authentication, such reference shall be deemed to include authentication and delivery on behalf of the Trustee by an Authenticating Agent and a certificate of authentication executed on behalf of the Trustee by an Authenticating Agent. Each Authenticating Agent shall be acceptable to the Company and shall at all times be a corporation organized and doing business under the laws of the United States, any State or territory thereof or the District of Columbia, authorized under such laws to act as Authenticating Agent, having a combined capital and surplus of not less than $50,000,000 and subject to supervision or examination by Federal, State or other applicable Governmental Authority. If such Authenticating Agent publishes reports of condition at least annually, pursuant to law or to the requirements of said supervising or examining authority, then for the purposes of this Section, the combined capital and surplus of such Authenticating Agent 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 an Authenticating Agent shall cease to be eligible in accordance with the provisions of this Section, such Authenticating Agent shall resign immediately in the manner and with the effect specified in this Section.

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Any corporation into which an Authenticating Agent may be merged or converted or with which it may be consolidated, or any corporation resulting from any merger, conversion or consolidation to which such Authenticating Agent shall be a party, or any corporation succeeding to the corporate agency or corporate trust business of an Authenticating Agent, shall continue to be an Authenticating Agent, provided such corporation shall be otherwise eligible under this Section, without the execution or filing of any paper or any further act on the part of the Trustee or the Authenticating Agent.

An Authenticating Agent may resign at any time by giving written notice thereof to the Trustee and to the Company. The Trustee may at any time terminate the agency of an Authenticating Agent by giving written notice thereof 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 such Authenticating Agent shall cease to be eligible in accordance with the provisions of this Section, the Trustee may appoint a successor Authenticating Agent which shall be acceptable to the Company. Any successor Authenticating Agent upon acceptance of its appointment hereunder shall become vested with all the rights, powers and duties of its predecessor hereunder, with like effect as if originally named as an Authenticating Agent. No successor Authenticating Agent shall be appointed unless eligible under the provisions of this Section.

The Trustee agrees to pay to each Authenticating Agent from time to time reasonable compensation for its services under this Section, and the Trustee shall be entitled to be reimbursed for such payments, in accordance with, and subject to the provisions of, Section 907.

The provisions of Sections 308, 904 and 905 shall be applicable to each Authenticating Agent.

If an appointment with respect to the Securities of one or more series shall be made pursuant to this Section, the Securities of such series may have endorsed thereon, in addition to the Trustee’s certificate of authentication, an alternate certificate of authentication substantially in the following form:

This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture.

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If all of the Securities of a series may not be originally issued at one time, and if the Trustee does not have an office capable of authenticating Securities upon original issuance located in a Place of Payment where the Company wishes to have Securities of such series authenticated upon original issuance, the Trustee, if so requested by the Company in writing (which writing need not comply with Section 102 and need not be accompanied by an Opinion of Counsel), shall appoint, in accordance with this Section and in accordance with such procedures as shall be acceptable to the Trustee, an Authenticating Agent having an office in a Place of Payment designated by the Company with respect to such series of Securities.

ARTICLE 10

Holders’ Lists and Reports by Trustee and Company

Section 1001. Lists of Holders

Semiannually, not later than 10 days after the regular record date for each series, commencing April 15, 2017, and at such other times as the Trustee may request in writing, the Company shall furnish or cause to be furnished to the Trustee information as to the names and addresses of the Holders, and the Trustee shall preserve such information and similar information received by it in any other capacity and afford to the Holders access to information so preserved by it, all to such extent, if any, and in such manner as shall be required by the Trust Indenture Act; provided, however, that no such list need be furnished so long as the Trustee shall be the Security Registrar.

Section 1002. Reports by Trustee and Company

Not later than July 1 in each year, commencing with the year 2017, the Trustee shall transmit to the Holders, the Commission and each securities exchange upon which any Securities are listed, a report, dated as of the next preceding May 1 ^st with respect to any events and other matters described in Section 313(a) of the Trust Indenture Act, in such manner and to the extent required by the Trust Indenture Act. The Trustee shall transmit to the Holders, the Commission and each securities exchange upon which any Securities are listed, and the Company shall file with the Trustee (within 15 days after filing with the Commission in the case of reports which pursuant to the Trust Indenture Act must be filed with the Commission and furnished to the Trustee) and transmit to the Holders, such other information, reports and other documents, if any, at such times and in such manner, as shall be required by the Trust Indenture Act. The Company shall notify the Trustee of the listing of any Securities on any securities exchange and of any delisting thereof.

Delivery of such reports, information and documents to the Trustee is for informational purposes only and the Trustee’s receipt of such shall not constitute constructive notice of any information contained therein or determinable from information contained therein, including the Company’s compliance with any of its covenants hereunder (as to which the Trustee is entitled to rely exclusively on Officer’s Certificates).

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ARTICLE 11

Consolidation, Merger, Conveyance or Other Transfer

Section 1101. Company May Consolidate, etc., Only on Certain Terms

The Company shall not consolidate with or merge into any other corporation or other entity, or convey or otherwise transfer or lease its properties and assets substantially as an entirety to any Person, unless

(a) the corporation or other entity formed by such consolidation or into which the Company is merged or the Person which acquires by conveyance or transfer, or which leases, the properties and assets of the Company substantially as an entirety shall be a Person validly existing under the laws of its jurisdiction of organization, and shall expressly assume by an indenture supplemental hereto, executed and delivered to the Trustee, in form satisfactory to the Trustee, the due and punctual payment of the principal of and premium, if any, and interest and Additional Amounts, if any, on all Outstanding Securities and the performance of every covenant of this Indenture on the part of the Company to be performed or observed;

(b) immediately after giving effect to such transaction, no Event of Default, and no event which, after notice or lapse of time or both, would become an Event of Default, shall have occurred and be continuing; and

(c) the Company shall have delivered to the Trustee an Officer’s Certificate and an Opinion of Counsel, each stating that such consolidation, merger, conveyance, or other transfer or lease and such supplemental indenture comply with this Article and that all conditions precedent herein provided for relating to such transactions have been complied with.

Section 1102. Successor Person Substituted

Upon any consolidation by the Company with or merger by the Company into any other corporation or other entity or any conveyance, or other transfer or lease of the properties and assets of the Company substantially as an entirety in accordance with Section 1101, the successor corporation or other entity formed by such consolidation or into which the Company is merged or the Person to which such conveyance, transfer or lease is made shall succeed to, and be substituted for, and may exercise every right and power of the Company under this Indenture with the same effect as if such successor Person had been named as the Company herein, and thereafter, except in the case of a lease, the predecessor Person shall be relieved of all obligations and covenants under this Indenture and the Securities Outstanding hereunder.

Section 1103. Merger into Company; Certain Transfers

Nothing in this Indenture shall be deemed to prevent or restrict any consolidation or merger after the consummation of which the Company would be the surviving or resulting entity or any conveyance or other transfer, or lease of any part of the properties of the Company which does not constitute the entirety, or substantially the entirety, of the direct assets of the

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Company. Nothing in this Indenture shall be deemed to prevent or restrict (i) any consolidation or merger of any Affiliate of the Company with any other person or entity (other than with the Company itself in a merger or consolidation not permitted under this Article Eleven), or (ii) any conveyance or other transfer, or lease, of any part of the assets of any Affiliate of the Company (other than the assets of the Company itself.)

Section 1104. Consolidation Defined

The term “consolidation” as used in this Article shall include similar transactions such as amalgamations and reorganizations.

ARTICLE 12

Supplemental Indentures

Section 1201. Supplemental Indentures Without Consent of Holders

Without the consent of any Holders, the Company and the Trustee, at any time and from time to time, may enter into one or more indentures supplemental hereto, in form satisfactory to the Trustee, for any of the following purposes:

(a) to evidence the succession of another Person to the Company and the assumption by any such successor of the covenants of the Company herein and in the Securities, all as provided in Article Eleven; or

(b) to evidence the addition of any guarantee for the benefit of the Holders of one or more specified series of the Securities, or the release or substitution of any guarantor in accordance with the provisions hereof or the provisions of the Securities of the specified series; or

(c) to add one or more covenants of the Company or other provisions for the benefit of all Holders or for the benefit of the Holders of, or to remain in effect only so long as there shall be Outstanding, Securities of one or more specified series, or one or more specified Tranches thereof, or to surrender any right or power herein conferred upon the Company; or

(d) to add any additional Events of Default with respect to all or any series of Securities Outstanding hereunder; or

(e) to change or eliminate any provision of this Indenture or to add any new provision to this Indenture; provided, however, that if such change, elimination or addition shall adversely affect the interests of the Holders of Securities of any series or Tranche (other than any series the terms of which permit such change, elimination or addition) Outstanding on the date of such indenture supplemental hereto in any material respect, such change, elimination or addition shall become effective (i) with respect to such series or Tranche only pursuant to the provisions of Section 1202 hereof or (ii) when no Security of such series or Tranche remains Outstanding; or

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(f) to provide collateral security for all but not part of the Securities; or

(g) to establish the form or terms of Securities of any series or Tranche as contemplated by Sections 201 and 301; or

(h) to the extent not provided herein or pursuant to Section 301, to provide for the authentication, delivery and issuance of bearer securities and coupons appertaining thereto representing interest, if any, thereon and for the procedures for the registration, exchange and replacement thereof and for the giving of notice to, and the solicitation of the vote or consent of, the holders thereof, and for any and all other matters incidental thereto; or

(i) to evidence and provide for the acceptance of appointment hereunder by a separate or successor Trustee or co-trustee with respect to the Securities of one or more series and to add to or change any of the provisions of this Indenture as shall be necessary to provide for or facilitate the administration of the trusts hereunder by more than one Trustee, pursuant to the requirements of Section 911(b); or

(j) to provide for the procedures required to permit the Company to utilize, at its option, a noncertificated system of registration for all, or any series or Tranche of, the Securities; or

(k) to change any place or places where (1) the principal of and premium, interest and Additional Amounts, if any, on all or any series of Securities, or any Tranche thereof, shall be payable, (2) all or any series of Securities, or any Tranche thereof, may be surrendered for registration of transfer, (3) all or any series of Securities, or any Tranche thereof, may be surrendered for exchange and (4) notices and demands to or upon the Company in respect of all or any series of Securities, or any Tranche thereof, and this Indenture may be served; or

(l) to cure any ambiguity, or to correct or supplement any provision herein which may be defective or inconsistent with any other provision herein.

Section 1202. Supplemental Indentures With Consent of Holders

With the consent of the Holders of a majority in aggregate principal amount of the Securities of all series then Outstanding under this Indenture, considered as one class, by Act of said Holders delivered to the Company and the Trustee, the Company, when authorized by Board Resolutions, and the Trustee may 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 modifying in any manner the rights of the Holders of Securities of such series under the Indenture; provided, however, that if there shall be Securities of more than one series Outstanding hereunder and if a proposed supplemental indenture shall directly affect the rights of the Holders of Securities of one or more, but less than all, of such series, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all series so directly affected, considered as one class, shall be required; and provided, further, that if the Securities of any series shall have been issued in more than one Tranche and if the proposed supplemental indenture shall directly affect the rights of the Holders

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of Securities of one or more, but less than all, of such Tranches, then the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Securities of all Tranches so directly affected, considered as one class, shall be required; and provided, further, that no such supplemental indenture shall:

(a) change the Stated Maturity of the principal of, or any installment of principal of or interest on any Security (other than pursuant to the terms thereof), or reduce the principal amount thereof or the rate of interest thereon (or the amount of any installment of interest thereon) or change the method of calculating such rate or reduce any premium payable upon the redemption thereof, or reduce the amount of the principal of a Discount Security that would be due and payable upon a declaration of acceleration of the Maturity thereof pursuant to Section 802, or change the coin or currency (or other property), in which any Security or any premium or the interest thereon is payable, or impair the right to institute suit for the enforcement of any such payment on or after the Stated Maturity of any Security (or, in the case of redemption, on or after the Redemption Date), without, in any such case, the consent of the Holder of such Security, or

(b) reduce the percentage in principal amount of the Outstanding Securities of any series or any Tranche thereof, the consent of the Holders of which is required for any such supplemental indenture, or the consent of the Holders of which is required for any waiver of compliance with any provision of this Indenture or of any default hereunder and its consequences, or reduce the requirements of Section 1304 for quorum or voting, without, in any such case, the consent of the Holders of each Outstanding Security of such series or Tranche, or

(c) modify any of the provisions of this Section, Section 607 or Section 813 with respect to the Securities of any series, or any Tranche thereof, except to increase the percentages in principal amount referred to in this Section or such other Sections or to provide that other provisions of this Indenture cannot be modified or waived without the consent of the Holder of each Outstanding Security affected thereby; provided, however, that this clause shall not be deemed to require the consent of any Holder with respect to changes in the references to “the Trustee” and concomitant changes in this Section, or the deletion of this proviso, in accordance with the requirements of Sections 911(b), 914 and 1201(h).

A supplemental indenture which changes or eliminates any covenant or other provision of this Indenture which has expressly been included solely for the benefit of one or more particular series of Securities, or of one or more Tranches thereof, or which modifies the rights of the Holders of Securities of such series with respect to such covenant or other provision, shall be deemed not to affect the rights under this Indenture of the Holders of Securities of any other series or Tranche.

It shall not be necessary for any Act of Holders under this Section to approve the particular form of any proposed supplemental indenture, but it shall be sufficient if such Act shall approve the substance thereof. A waiver by a Holder of such Holder’s right to consent under this Section shall be deemed to be a consent of such Holder.

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Anything in this Indenture to the contrary notwithstanding, if the Officer’s Certificate, supplemental indenture or Board Resolution, as the case may be, establishing the Securities of any series or Tranche shall provide that the Company may make certain specified additions, changes or eliminations to or from the Indenture which shall be specified in such Officer’s Certificate, supplemental indenture or Board Resolution establishing such series or Tranche, (a) the Holders of Securities of such series or Tranche shall be deemed to have consented to a supplemental indenture containing such additions, changes or eliminations to or from the Indenture which shall be specified in such Officer’s Certificate, supplemental indenture or Board Resolution establishing such series or Tranche, (b) no Act of such Holders shall be required to evidence such consent and (c) such consent may be counted in the determination of whether or not the Holders of the requisite principal amount of Securities shall have consented to such supplemental indenture.

Section 1203. Execution of Supplemental Indentures

In executing, or accepting the additional trusts created by, any supplemental indenture permitted by this Article or the modifications thereby of the trusts created by this Indenture, the Trustee shall be entitled to receive, and (subject to Section 901) shall be fully protected in relying upon, an Opinion of Counsel stating that the execution of such supplemental indenture is authorized or permitted by this Indenture. The Trustee may, but shall not be obligated to, enter into any such supplemental indenture which affects the Trustee’s own rights, duties, immunities or liabilities under this Indenture or otherwise.

Section 1204. Effect of Supplemental Indentures

Upon the execution of any supplemental indenture under this Article, this Indenture shall be modified in accordance therewith, and such supplemental indenture shall form a part of this Indenture for all purposes; and every Holder of Securities theretofore or thereafter authenticated and delivered hereunder shall be bound thereby. Any supplemental indenture permitted by this Article may restate this Indenture in its entirety, and, upon the execution and delivery thereof, any such restatement shall supersede this Indenture as theretofore in effect for all purposes.

Section 1205. Conformity with Trust Indenture Act

Every supplemental indenture executed pursuant to this Article shall conform to the requirements of the Trust Indenture Act as then in effect, if applicable.

Section 1206. Reference in Securities to Supplemental Indentures

Securities of any series, or any Tranche thereof, authenticated and delivered after the execution of any supplemental indenture pursuant to this Article may, and shall if required by the Trustee, bear a notation in form approved by the Trustee as to any matter provided for in such supplemental indenture. If the Company shall so determine, new Securities of any series, or any Tranche thereof, so modified as to conform, in the opinion of the Trustee and the Company, to any such supplemental indenture may be prepared and executed by the Company and authenticated and delivered by the Trustee in exchange for Outstanding Securities of such series or Tranche.

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Section 1207. Modification Without Supplemental Indenture

If the terms of any particular series of Securities shall have been established in a Board Resolution or an Officer’s Certificate as contemplated by Section 301, and not in an indenture supplemental hereto, additions to, changes in or the elimination of any of such terms may be effected by means of a supplemental Board Resolution or Officer’s Certificate, as the case may be, delivered to, and accepted by, the Trustee; provided, however, that such supplemental Board Resolution or Officer’s Certificate shall not be accepted by the Trustee or otherwise be effective unless all conditions set forth in this Indenture which would be required to be satisfied if such additions, changes or elimination were contained in a supplemental indenture shall have been appropriately satisfied. Upon the acceptance thereof by the Trustee, any such supplemental Board Resolution or Officer’s Certificate shall be deemed to be a “supplemental indenture” for purposes of Sections 1204 and 1205.

ARTICLE 13

Meetings of Holders; Action Without Meeting

Section 1301. Purposes for Which Meetings May Be Called

A meeting of Holders of Securities of one or more, or all, series, or any Tranche or Tranches thereof, may be called at any time and from time to time pursuant to this Article to make, give or take any request, demand, authorization, direction, notice, consent, waiver or other action provided by this Indenture to be made, given or taken by Holders of Securities of such series or Tranches.

Section 1302. Call, Notice and Place of Meetings

(a) The Trustee may at any time call a meeting of Holders of Securities of one or more, or all, series, or any Tranche or Tranches thereof, for any purpose specified in Section 1301, to be held at such time and at such place in the Borough of Manhattan, The City of New York, as the Trustee shall determine, or, with the approval of the Company, at any other place. Notice of every such meeting, setting forth the time and the place of such meeting and in general terms the action proposed to be taken at such meeting, shall be given, in the manner provided in Section 106, not less than 21 nor more than 180 days prior to the date fixed for the meeting.

(b) If the Trustee shall have been requested to call a meeting of the Holders of Securities of one or more, or all, series, or any Tranche or Tranches thereof, by the Company or by the Holders of 33% in aggregate principal amount of all of such series and Tranches, considered as one class, for any purpose specified in Section 1301, by written request setting forth in reasonable detail the action proposed to be taken at the meeting, and the Trustee shall not have given the notice of such meeting within 21 days after receipt of such request or shall not thereafter proceed to cause the meeting to be held as provided herein, then the Company or the Holders of Securities of such series and Tranches in the amount above specified, as the case may be, may determine the time and the place in the Borough of Manhattan, The City of New York, or in such other place as shall be determined or approved by the Company, for such meeting and may call such meeting for such purposes by giving notice thereof as provided in subsection (a) of this Section.

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(c) Any meeting of Holders of Securities of one or more, or all, series, or any Tranche or Tranches thereof, shall be valid without notice if the Holders of all Outstanding Securities of such series or Tranches are present in person or by proxy and if representatives of the Company and the Trustee are present, or if notice is waived in writing before or after the meeting by the Holders of all Outstanding Securities of such series, or any Tranche or Tranches thereof, or by such of them as are not present at the meeting in person or by proxy, and by the Company and the Trustee.

Section 1303. Persons Entitled to Vote at Meetings

To be entitled to vote at any meeting of Holders of Securities of one or more, or all, series, or any Tranche or Tranches thereof, a Person shall be (a) a Holder of one or more Outstanding Securities of such series or Tranches, or (b) a Person appointed by an instrument in writing as proxy for a Holder or Holders of one or more Outstanding Securities of such series or Tranches by such Holder or Holders. The only Persons who shall be entitled to attend any meeting of Holders of Securities of any series or Tranche shall be the Persons entitled to vote at such meeting and their counsel, any representatives of the Trustee and its counsel and any representatives of the Company and its counsel.

Section 1304. Quorum; Action

The Persons entitled to vote a majority in aggregate principal amount of the Outstanding Securities of the series and Tranches with respect to which a meeting shall have been called as hereinbefore provided, considered as one class, shall constitute a quorum for a meeting of Holders of Securities of such series and Tranches; provided, however, that if any action is to be taken at such meeting which this Indenture expressly provides may be taken by the Holders of a specified percentage, which is less than a majority, in principal amount of the Outstanding Securities of such series and Tranches, considered as one class, the Persons entitled to vote such specified percentage in principal amount of the Outstanding Securities of such series and Tranches, considered as one class, shall constitute a quorum. In the absence of a quorum within one hour of the time appointed for any such meeting, the meeting shall, if convened at the request of Holders of Securities of such series and Tranches, be dissolved. In any other case the meeting may be adjourned for such period as may be determined by the chairman of the meeting prior to the adjournment of such meeting. In the absence of a quorum at any such adjourned meeting, such adjourned meeting may be further adjourned for such period as may be determined by the chairman of the meeting prior to the adjournment of such adjourned meeting. Except as provided by Section 1305(e), notice of the reconvening of any meeting adjourned for more than 30 days shall be given as provided in Section 1302(a) not less than 10 days prior to the date on which the meeting is scheduled to be reconvened. Notice of the reconvening of an adjourned meeting shall state expressly the percentage, as provided above, of the principal amount of the Outstanding Securities of such series and Tranches which shall constitute a quorum.

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Except as limited by Section 1202, any resolution presented to a meeting or adjourned meeting duly reconvened at which a quorum is present as aforesaid may be adopted only by the affirmative vote of the Holders of a majority in aggregate principal amount of the Outstanding Securities of the series and Tranches with respect to which such meeting shall have been called, considered as one class; provided, however, that, except as so limited, any resolution with respect to any action which this Indenture expressly provides may be taken by the Holders of a specified percentage, which is less than a majority, in principal amount of the Outstanding Securities of such series and Tranches, considered as one class, may be adopted at a meeting or an adjourned meeting duly reconvened and at which a quorum is present as aforesaid by the affirmative vote of the Holders of such specified percentage in principal amount of the Outstanding Securities of such series and Tranches, considered as one class.

Any resolution passed or decision taken at any meeting of Holders of Securities duly held in accordance with this Section shall be binding on all the Holders of Securities of the series and Tranches with respect to which such meeting shall have been held, whether or not present or represented at the meeting.

Section 1305. Attendance at Meetings; Determination of Voting Rights; Conduct and Adjournment of Meetings

(a) Attendance at meetings of Holders of Securities may be in person or if the Securities are in registered form by proxy; and, to the extent permitted by law, any such proxy shall remain in effect and be binding upon any future Holder of the Securities with respect to which it was given unless and until specifically revoked by the Holder or future Holder of such Securities before being voted.

(b) Notwithstanding any other provisions of this Indenture, the Trustee may make such reasonable regulations as it may deem advisable for any meeting of Holders of Securities in regard to proof of the holding of such Securities 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 deem appropriate. Except as otherwise permitted or required by any such regulations, the holding of Securities shall be proved in the manner specified in Section 104 and the appointment of any proxy shall be proved in the manner specified in Section 104. Such regulations may provide that written instruments appointing proxies, regular on their face, may be presumed valid and genuine without the proof specified in Section 104 or other proof.

(c) 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 1302(b), in which case the Company or the Holders of Securities of the series and Tranches 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 Persons entitled to vote a majority in aggregate principal amount of the Outstanding Securities of all series and Tranches represented at the meeting, considered as one class.

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(d) At any meeting each Holder or proxy shall be entitled to one vote for each $1 principal amount of Securities held or represented by him; provided, however, that no vote shall be cast or counted at any meeting in respect of any Security 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, except as a Holder of a Security or proxy.

(e) Any meeting duly called pursuant to Section 1302 at which a quorum is present may be adjourned from time to time by Persons entitled to vote a majority in aggregate principal amount of the Outstanding Securities of all series and Tranches represented at the meeting, considered as one class; and the meeting may be held as so adjourned without further notice.

Section 1306. Counting Votes and Recording Action of Meetings

The vote upon any resolution submitted to any meeting of Holders shall be by written ballots on which shall be subscribed the signatures of the Holders or of their representatives by proxy and the principal amounts and serial numbers of the Outstanding Securities, of the series and Tranches with respect to which the meeting shall have been called, 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 of all votes cast at the meeting. A record 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 given as provided in Section 1302 and, if applicable, Section 1304. Each copy shall be signed and verified by the affidavits of the permanent chairman and secretary of the meeting and one such copy shall be delivered to the Company, and another 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 1307. Action Without Meeting

In lieu of a vote of Holders at a meeting as hereinbefore contemplated in this Article, any request, demand, authorization, direction, notice, consent, waiver or other action may be made, given or taken by Holders by written instruments as provided in Section 104.

ARTICLE 14

Immunity of Incorporators, Stockholders, Officers and Directors

Section 1401. Liability Solely Corporate

No recourse shall be had for the payment of the principal of or premium, if any, or interest or Additional Amounts, if any, on any Securities, or any part thereof, or for any claim based thereon or otherwise in respect thereof, or of the indebtedness represented thereby, or upon

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any obligation, covenant or agreement under this Indenture, against any past, present or future incorporator, shareholder, member, limited partner, stockholder, officer, manager or director, as such, of the Company, or any predecessor or successor of the Company, either directly or indirectly, whether by virtue of any constitutional provision, statute or rule of law, or by the enforcement of any assessment or penalty or otherwise; it being expressly agreed and understood that this Indenture and all the Securities are solely obligations of the Company, and that no personal liability whatsoever shall attach to, or be incurred by, any past, present or future incorporator, shareholder, member, limited partner, stockholder, officer, manager or director of the Company or any predecessor or successor of the Company, either directly or indirectly, because of the indebtedness hereby authorized or under or by reason of any of the obligations, covenants or agreements contained in this Indenture or in any of the Securities or to be implied herefrom or therefrom, and that any such personal liability is hereby expressly waived and released as a condition of, and as part of the consideration for, the execution of this Indenture and the issuance of the Securities.

ARTICLE 15

Subordination of Securities

Section 1501. Securities Subordinate to Senior Indebtedness.

The Company, for itself, its successors and assigns, covenants and agrees, and each Holder of the Securities of each series, by its acceptance thereof, likewise covenants and agrees, that the payment of the principal of and premium, if any, and interest, if any, and Additional Amounts, if any, on each and all of the Securities is hereby expressly subordinated and junior, to the extent and in the manner set forth in this Article, in right of payment to the prior payment in full of all Senior Indebtedness.

Each Holder of the Securities of each series, by its acceptance thereof, authorizes and directs the Trustee on its behalf to take such action as may be necessary or appropriate to effectuate the subordination as provided in this Article, and appoints the Trustee its attorney-in-fact for any and all such purposes.

Section 1502. Payment Over of Proceeds of Securities.

In the event (a) of any insolvency or bankruptcy proceedings or any receivership, liquidation, reorganization or other similar proceedings in respect of the Company or a substantial part of its property, or of any proceedings for liquidation, dissolution or other winding up of the Company, whether or not involving insolvency or bankruptcy, or (b) subject to the provisions of Section 1503, that (i) a default shall have occurred with respect to the payment of principal of or interest on or other monetary amounts due and payable on any Senior Indebtedness, or (ii) there shall have occurred a default (other than a default in the payment of principal or interest or other monetary amounts due and payable) in respect of any Senior Indebtedness, as defined therein or in the instrument under which the same is outstanding, permitting the holder or holders thereof to accelerate the maturity thereof (with notice or lapse of time, or both), and such default shall have continued beyond the period of grace, if any, in respect thereof, and, in the cases of subclauses (i) and (ii) of this clause (b), such default shall not

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have been cured or waived or shall not have ceased to exist, or (c) that the principal of and accrued interest on the Securities of any series shall have been declared due and payable pursuant to Section 802 and such declaration shall not have been rescinded and annulled as provided in Section 802, then:

(1) the holders of all Senior Indebtedness shall first be entitled to receive payment of the full amount due thereon, or provision shall be made for such payment in money or money’s worth, before the Holders of any of the Securities are entitled to receive a payment on account of the principal of or interest on the indebtedness evidenced by the Securities, including, without limitation, any payments made pursuant to Articles Four and Five;

(2) any payment by, or distribution of assets of, the Company of any kind or character, whether in cash, property or securities, to which any Holder or the Trustee would be entitled except for the provisions of this Article, shall be paid or delivered by the person making such payment or distribution, whether a trustee in bankruptcy, a receiver or liquidating trustee or otherwise, directly to the holders of such Senior Indebtedness or their representative or representatives or to the trustee or trustees under any indenture under which any instruments evidencing any of such Senior Indebtedness may have been issued, ratably according to the aggregate amounts remaining unpaid on account of such Senior Indebtedness held or represented by each, to the extent necessary to make payment in full of all Senior Indebtedness remaining unpaid after giving effect to any concurrent payment or distribution (or provision therefor) to the holders of such Senior Indebtedness, before any payment or distribution is made to the Holders of the indebtedness evidenced by the Securities or to the Trustee under this Indenture; and

(3) in the event that, notwithstanding the foregoing, any payment by, or distribution of assets of, the Company of any kind or character, whether in cash, property or securities, in respect of principal of or interest on the Securities or in connection with any repurchase by the Company of the Securities, shall be received by the Trustee or any Holder before all Senior Indebtedness is paid in full, or provision is made for such payment in money or money’s worth, such payment or distribution in respect of principal of or interest on the Securities or in connection with any repurchase by the Company of the Securities shall be paid over to the holders of such Senior Indebtedness or their representative or representatives or to the trustee or trustees under any indenture under which any instruments evidencing any such Senior Indebtedness may have been issued, ratably as aforesaid, for application to the payment of all Senior Indebtedness remaining unpaid until all such Senior Indebtedness shall have been paid in full, after giving effect to any concurrent payment or distribution (or provision therefor) to the holders of such Senior Indebtedness.

Notwithstanding the foregoing, at any time after the 123rd day following the date of deposit of cash or Government Obligations pursuant to Section 701 (provided all conditions set out in such Section shall have been satisfied), the funds so deposited and any interest thereon

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will not be subject to any rights of holders of Senior Indebtedness including, without limitation, those arising under this Article Sixteen; provided that no event described in clauses (d) and (e) of Section 801 with respect to the Company has occurred during such 123-day period.

For purposes of this Article only, the words “cash, property or securities” shall not be deemed to include shares of stock of the Company as reorganized or readjusted, or securities of the Company or any other corporation provided for by a plan of reorganization or readjustment which are subordinate in right of payment to all Senior Indebtedness which may at the time be outstanding to the same extent as, or to a greater extent than, the Securities are so subordinated as provided in this Article. The consolidation of the Company with, or the merger of the Company into, another corporation or the liquidation or dissolution of the Company following the conveyance or transfer of its property as an entirety, or substantially as an entirety, to another corporation upon the terms and conditions provided for in Article Eleven hereof shall not be deemed a dissolution, winding-up, liquidation or reorganization for the purposes of this Section 1502 if such other corporation shall, as a part of such consolidation, merger, conveyance or transfer, comply with the conditions stated in Article Eleven hereof. Nothing in Section 1501 or in this Section 1502 shall apply to claims of, or payments to, the Trustee under or pursuant to Section 907.

Section 1503. Disputes with Holders of Certain Senior Indebtedness.

Any failure by the Company to make any payment on or perform any other obligation in respect of Senior Indebtedness, other than any indebtedness incurred by the Company or assumed or guaranteed, directly or indirectly, by the Company for money borrowed (or any deferral, renewal, extension or refunding thereof) or any other obligation as to which the provisions of this Section shall have been waived by the Company in the instrument or instruments by which the Company incurred, assumed, guaranteed or otherwise created such indebtedness or obligation, shall not be deemed a default under clause (b) of Section 1502 if (i) the Company shall be disputing its obligation to make such payment or perform such obligation and (ii) either (A) no final judgment relating to such dispute shall have been issued against the Company which is in full force and effect and is not subject to further review, including a judgment that has become final by reason of the expiration of the time within which a party may seek further appeal or review, or (B) in the event that a judgment that is subject to further review or appeal has been issued, the Company shall in good faith be prosecuting an appeal or other proceeding for review and a stay or execution shall have been obtained pending such appeal or review.

Section 1504. Subrogation.

Senior Indebtedness shall not be deemed to have been paid in full unless the holders thereof shall have received cash (or securities or other property satisfactory to such holders) in full payment of such Senior Indebtedness then outstanding. Subject to the prior payment in full of all Senior Indebtedness, the rights of the Holders of the Securities shall be subrogated to the rights of the holders of Senior Indebtedness to receive any further payments or distributions of cash, property or securities of the Company applicable to the holders of the Senior Indebtedness until all amounts owing on the Securities shall be paid in full; and such payments or distributions of cash, property or securities received by the Holders of the

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Securities, by reason of such subrogation, which otherwise would be paid or distributed to the holders of such Senior Indebtedness shall, as between the Company, its creditors other than the holders of Senior Indebtedness, and the Holders, be deemed to be a payment by the Company to or on account of Senior Indebtedness, it being understood that the provisions of this Article are and are intended solely for the purpose of defining the relative rights of the Holders, on the one hand, and the holders of the Senior Indebtedness, on the other hand.

Section 1505. Obligation of the Company Unconditional.

Nothing contained in this Article or elsewhere in this Indenture or in the Securities is intended to or shall impair, as among the Company, its creditors other than the holders of Senior Indebtedness and the Holders, the obligation of the Company, which is absolute and unconditional, to pay to the Holders the principal of and interest on the Securities as and when the same shall become due and payable in accordance with their terms, or is intended to or shall affect the relative rights of the Holders and creditors of the Company other than the holders of Senior Indebtedness, nor shall anything herein or therein prevent the Trustee or any Holder from exercising all remedies otherwise permitted by applicable law upon default under this Indenture, subject to the rights, if any, under this Article of the holders of Senior Indebtedness in respect of cash, property or securities of the Company received upon the exercise of any such remedy.

Upon any payment or distribution of assets or securities of the Company referred to in this Article, the Trustee and the Holders shall be entitled to rely upon any order or decree of a court of competent jurisdiction in which such dissolution, winding up, liquidation or reorganization proceedings are pending for the purpose of ascertaining the persons entitled to participate in such distribution, the holders of the Senior Indebtedness and other indebtedness of the Company, the amount thereof or payable thereon, the amount or amounts paid or distributed thereon, and all other facts pertinent thereto or to this Article.

Section 1506. Priority of Senior Indebtedness Upon Maturity.

Upon the maturity of the principal of any Senior Indebtedness by lapse of time, acceleration or otherwise, all matured principal of Senior Indebtedness and interest and premium, if any, thereon shall first be paid in full before any payment of principal or premium, if any, or interest, if any, is made upon the Securities or before any Securities can be acquired by the Company or any sinking fund payment is made with respect to the Securities (except that required sinking fund payments may be reduced by Securities acquired before such maturity of such Senior Indebtedness).

Section 1507. Trustee as Holder of Senior Indebtedness.

The Trustee shall be entitled to all rights set forth in this Article with respect to any Senior Indebtedness at any time held by it, to the same extent as any other holder of Senior Indebtedness. Nothing in this Article shall deprive the Trustee of any of its rights as such holder.

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Section 1508. Notice to Trustee to Effectuate Subordination.

Notwithstanding the provisions of this Article or any other provision of the Indenture, the Trustee shall not be charged with knowledge of the existence of any facts which would prohibit the making of any payment of moneys to or by the Trustee unless and until the Trustee shall have received written notice thereof from the Company, from a Holder or from a holder of any Senior Indebtedness or from any representative or representatives of such holder and, prior to the receipt of any such written notice, the Trustee shall be entitled, subject to Section 901, in all respects to assume that no such facts exist; provided, however, that, if prior to the fifth Business Day preceding the date upon which by the terms hereof any such moneys may become payable for any purpose, or in the event of the execution of an instrument pursuant to Section 702 acknowledging satisfaction and discharge of this Indenture, then if prior to the second Business Day preceding the date of such execution, the Trustee shall not have received with respect to such moneys the notice provided for in this Section, then, anything herein contained to the contrary notwithstanding, the Trustee may, in its discretion, receive such moneys and/or apply the same to the purpose for which they were received, and shall not be affected by any notice to the contrary, which may be received by it on or after such date; provided, however, that no such application shall affect the obligations under this Article of the persons receiving such moneys from the Trustee.

Section 1509. Modification, Extension, etc. of Senior Indebtedness.

The holders of Senior Indebtedness may, without affecting in any manner the subordination of the payment of the principal of and premium, if any, and interest, if any, on the Securities, at any time or from time to time and in their absolute discretion, agree with the Company to change the manner, place or terms of payment, change or extend the time of payment of, or renew or alter, any Senior Indebtedness, or amend or supplement any instrument pursuant to which any Senior Indebtedness is issued, or exercise or refrain from exercising any other of their rights under the Senior Indebtedness including, without limitation, the waiver of default thereunder, all without notice to or assent from the Holders or the Trustee.

Section 1510. Trustee Has No Fiduciary Duty to Holders of Senior Indebtedness.

With respect to the holders of Senior Indebtedness, the Trustee undertakes to perform or to observe only such of its covenants and objectives as are specifically set forth in this Indenture, and no implied covenants or obligations with respect to the holders of Senior Indebtedness shall be read into this Indenture against the Trustee. The Trustee shall not be deemed to owe any fiduciary duty to the holders of Senior Indebtedness, and shall not be liable to any such holders if it shall mistakenly pay over or deliver to the Holders or the Company or any other Person, money or assets to which any holders of Senior Indebtedness shall be entitled by virtue of this Article or otherwise.

Section 1511. Paying Agents Other Than the Trustee.

In case at any time any Paying Agent other than the Trustee shall have been appointed by the Company and be then acting hereunder, the term “Trustee” as used in this Article shall in such case (unless the context shall otherwise require) be construed as extending to and including such Paying Agent within its meaning as fully for all intents and purposes as if such Paying Agent were named in this Article in addition to or in place of the Trustee; provided, however, that Sections 1507, 1508 and 1510 shall not apply to the Company if it acts as Paying Agent.

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Section 1512. Rights of Holders of Senior Indebtedness Not Impaired.

No right of any present or future holder of Senior Indebtedness to enforce the subordination herein shall at any time or in any way be prejudiced or impaired by any act or failure to act on the part of the Company or by any noncompliance by the Company with the terms, provisions and covenants of this Indenture, regardless of any knowledge thereof any such holder may have or be otherwise charged with.

Section 1513. Effect of Subordination Provisions; Termination.

Notwithstanding anything contained herein to the contrary, other than as provided in the immediately succeeding sentence, all the provisions of this Indenture shall be subject to the provisions of this Article, so far as the same may be applicable thereto.

Notwithstanding anything contained herein to the contrary, the provisions of this Article Sixteen shall be of no further effect, and the Securities shall no longer be subordinated in right of payment to the prior payment of Senior Indebtedness, if the Company shall have delivered to the Trustee a notice to such effect. Any such notice delivered by the Company shall not be deemed to be a supplemental indenture for purposes of Article Twelve.

[ Signature Page Follows ]

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

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

Exhibit 4.2

ENTERPRISE FINANCIAL SERVICES CORP

FIRST SUPPLEMENTAL INDENTURE

dated as of November 1, 2016

to the

INDENTURE

SUBORDINATED DEBT SECURITIES

dated as of November 1, 2016

4.75% Fixed-to-Floating Rate Subordinated Notes due November 1, 2026

U.S. Bank National Association, as Trustee

FIRST SUPPLEMENTAL INDENTURE

THIS FIRST SUPPLEMENTAL INDENTURE (“ First Supplemental Indenture ”), dated as of November 1, 2016 between Enterprise Financial Services Corp, a Delaware corporation (the “ Company ”), and U.S. Bank National Association, a national banking association, not in its individual capacity but solely as trustee (“ Trustee ”).

RECITALS

WHEREAS , the Company and the Trustee have executed and delivered an Indenture for Subordinated Debt Securities, dated as of November 1, 2016 (the “ Base Indenture ” and as supplemented by this First Supplemental Indenture and further supplemented from time to time, the “ Indenture ”), to provide for the issuance from time to time by the Company of its unsecured subordinated indebtedness to be issued in one or more series as provided in the Indenture;

WHEREAS , the issuance and sale of Fifty Million Dollars ($50,000,000) aggregate principal amount of a new series of Securities of the Company designated as its 4.75% Fixed-to-Floating Rate Subordinated Notes due November 1, 2026 (the “ 2026 Notes ”) have been authorized by the Board of Directors of the Company;

WHEREAS , the Company desires to issue and sell Fifty Million Dollars ($50,000,000) aggregate principal amount of the 2026 Notes as of the date hereof;

WHEREAS , the Company desires to establish the terms of the 2026 Notes;

WHEREAS , all things necessary to make this First Supplemental Indenture a legal and binding supplement to the Base Indenture in accordance with its terms and the terms of the Base Indenture have been done;

WHEREAS , the Company has complied with all conditions precedent provided for in the Base Indenture relating to this First Supplemental Indenture; and

WHEREAS , the Company has requested that the Trustee execute and deliver this First Supplemental Indenture.

NOW, THEREFORE , for and in consideration of the premises stated herein and the purchase of the 2026 Notes by the Holders thereof, the Company and the Trustee covenant and agree, for the equal and proportionate benefit of the Holders of the 2026 Notes, as follows:

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ARTICLE I

SCOPE OF FIRST SUPPLEMENTAL INDENTURE

Section 1.01. Scope . This First Supplemental Indenture constitutes a supplement to the Base Indenture and an integral part of the Indenture and shall be read together with the Base Indenture as though all the provisions thereof are contained in one instrument. Except as expressly amended by the First Supplemental Indenture, the terms and provisions of the Base Indenture shall remain in full force and effect. Notwithstanding the foregoing, this First Supplemental Indenture shall only apply to the 2026 Notes.

ARTICLE II

DEFINITIONS

Section 2.01. Definitions and Other Provisions of General Application . For all purposes of this First Supplemental Indenture unless otherwise specified herein:

(a) all terms used in this First Supplemental Indenture which are not otherwise defined herein shall have the meanings they are given in the Base Indenture;

(b) the provisions of general application stated in Sections 102 through 113 of the Base Indenture shall apply to this First Supplemental Indenture, except that the words “ herein ,” “ hereof ,” “ hereto ” and “ hereunder ” and other words of similar import refer to this First Supplemental Indenture as a whole and not to the Base Indenture or any particular Article, Section or other subdivision of the Base Indenture or this First Supplemental Indenture;

(c) Section 101 of the Base Indenture is amended and supplemented, solely with respect to the 2026 Notes, by amending and restating the following defined terms in their entirety:

“Authorized Officer” means the Chief Executive Officer, the President, any Executive Vice President, any Senior Vice President, or Company secretary, any authorized attorney or any other officer or agent of the Company duly authorized by a Board Resolution to act on behalf of the Company in respect of matters relating to this Indenture.

(d) Section 101 of the Base Indenture is amended and supplemented, solely with respect to the 2026 Notes, by inserting the following additional defined terms in their appropriate alphabetical positions:

“Calculation Agent” has the meaning ascribed in Section 3.02(e)(iv).

“ Designated LIBOR Page ” means the display on Reuters, or any successor service, on page LIBOR01, or any other page as may replace that page on that service, for the purpose of displaying the London interbank rates for U.S. dollars.

“DTC” has the meaning provided in Section 3.02(g).

“Federal Reserve” has the meaning provided in the definition of “Tier 2 Capital Event.”

“Fixed Rate Interest Payment Date” has the meaning provided in Section 3.02(e)(i).

“Fixed Rate Period” has the meaning provided in Section 3.02(e)(i).

“Fixed Rate Regular Record Date” has the meaning provided in Section 3.02(e)(i).

“Floating Rate Interest Payment Date” has the meaning provided in Section 3.02(e)(ii).

“Floating Rate Period” has the meaning provided in Section 3.02(e)(ii).

“Floating Rate Regular Record Date” has the meaning provided in Section 3.02(e)(ii).

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“Interest Payment Date” has the meaning provided in Section 3.02(e)(ii).

“Issue Date” means November 1, 2016.

“ London Banking Day ” means any day on which commercial banks are open for business (including dealing in U.S. dollars) in London.

“Representative Amount” has the meaning provided in the definition of “Three-Month LIBOR.”

“Reset Rate Determination Date” means the second London Banking Day immediately preceding the first day of each applicable interest period commencing on the first Floating Rate Interest Payment Date.

“Tax Event” shall mean the receipt by the Company of an opinion of independent tax counsel to the effect that as a result of (a) an amendment to, or change (including any announced prospective change) in, the laws or any regulations thereunder of the United States or any political subdivision or taxing authority thereof or therein, or (b) any official administrative pronouncement or judicial decision interpreting or applying such laws or regulations, which change or amendment becomes effective or which pronouncement or decision is announced on or after the date of original issuance of the 2026 Notes, there is more than an insubstantial risk that the interest payable by the Company on the 2026 Notes is not, or within 90 days of the date of such opinion will not be, deductible by the Company, in whole or in part, for United States federal income tax purposes.

“Tier 2 Capital Event” shall mean the receipt by the Company of an opinion of independent bank regulatory counsel to the effect that, as a result of (a) any amendment to, or change (including any announced prospective change) in, the laws or any regulations thereunder of the United States or any rules, guidelines or policies of an applicable regulatory authority for the Company or (b) any official administrative pronouncement or judicial decision interpreting or applying such laws or regulations, which amendment or change is effective or which pronouncement or decision is announced on or after the date of original issuance of the 2026 Notes, the 2026 Notes do not constitute, or within 90 days of the date of such opinion will not constitute, Tier 2 Capital (or its then equivalent if the Company were subject to such capital requirement) for purposes of capital adequacy guidelines of the Board of Governors of the Federal Reserve System (the “Federal Reserve”) (or any successor regulatory authority with jurisdiction over bank holding companies), as then in effect and applicable to the Company that would preclude the 2026 Notes from being included as Tier 2 Capital.

“Three-Month LIBOR” means, for any interest period, the offered rate for deposits in U.S. dollars having a maturity of three months that appears on the Designated LIBOR Page as of 11:00 a.m., London time, on the Reset Rate Determination Date related to such interest period. If such rate does not appear on such page at such time, then the Calculation Agent will request the principal London office of each of four major reference banks in the London interbank market, selected by the Company for this purpose and whose names and contact information will be provided by the Company to the Calculation Agent, to provide such bank’s offered quotation to prime banks in the London interbank market for deposits in U.S. dollars with a term of three months as of 11:00 a m., London time, on such Reset Rate Determination Date and in a principal amount equal to an amount for a single transaction in U.S. dollars in the relevant market at the relevant time as determined by the Company and provided to the Calculation Agent (a “ Representative Amount ”). If at least two such quotations are so provided, Three-Month LIBOR for the interest period related to such Reset Rate Determination Date will be the arithmetic mean of such quotations. If fewer than two such quotations are provided, the Calculation Agent will request each of three major banks in the City of New York selected by the Company for this purpose and whose names and contact information will be provided by the Company to the Calculation Agent, to provide such bank’s rate for loans in U.S. dollars to leading European banks with a term of three months as of approximately 11:00 a m., New York City time, on such Reset Rate Determination Date and in a Representative Amount. If at least two such rates are so provided, Three-Month LIBOR for the interest period related to such Reset Rate Determination Date will be the arithmetic mean of such quotations. If fewer than two such rates are so provided, then Three-Month LIBOR for the interest period related to such Reset Rate Determination Date will be set to equal the Three-Month LIBOR for the immediately preceding interest period or, in the case of the interest period commencing on the first Floating Rate Interest Payment Date, 5.00%. All percentages used in or resulting from any calculation of Three-Month LIBOR will be rounded, if necessary, to the nearest one hundred-thousandth of a percentage point, with 0.000005% rounded up to 0.00001%.

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Notwithstanding the foregoing, in the event that Three-Month LIBOR as determined in accordance with this definition is less than zero, Three-Month LIBOR for such interest period shall be deemed to be zero.

(d) Section 101 of the Base Indenture is amended and supplemented, solely with respect to the 2026 Notes, by replacing the corresponding defined term in the Base Indenture with the following defined term:

“Senior Indebtedness” means all obligations (other than non-recourse obligations and the indebtedness issued under this Indenture) of, or guaranteed or assumed by, the Company for borrowed money, including both senior and subordinated indebtedness for borrowed money (other than the 2026 Notes), or for the payment of money relating to any lease which is capitalized on the consolidated balance sheet of the Company and its subsidiaries in accordance with generally accepted accounting principles as in effect from time to time, or evidenced by bonds, debentures, notes or other similar instruments, and in each case, amendments, renewals, extensions, modifications and refundings of any such indebtedness or obligations, whether existing as of the date of this Indenture or subsequently incurred by the Company unless, in the case of any particular indebtedness, renewal, extension or refunding, the instrument creating or evidencing the same or the assumption or guarantee of the same expressly provides that such indebtedness, renewal, extension or refunding is not superior in right of payment to or is pari passu with the 2026 Notes.

ARTICLE III

FORM AND TERMS OF THE 2026 Notes

Section 3.01. Form and Dating .

(a) The 2026 Notes shall be substantially in the form of Exhibit A attached hereto. The 2026 Notes shall be executed on behalf of the Company by its Chairman of the Board, its Chief Executive Officer, its President or one of its Executive Vice Presidents, attested by its Secretary or one of its Assistant Secretaries. The 2026 Notes may have a legend or legends or endorsements as may be required to comply with any law or with any rules of any securities exchange or usage. The 2026 Notes shall be dated the date of their authentication.

(b) The terms contained in the 2026 Notes shall constitute, and are hereby expressly made, a part of the Indenture as supplemented by this First Supplemental Indenture, and the Company and the Trustee, by their execution and delivery of this First Supplemental Indenture, expressly agree to such terms and provisions and to be bound thereby.

Section 3.02. Terms of the 2026 Notes . The following terms relating to the 2026 Notes are hereby established:

(a) Title . The 2026 Notes shall constitute a series of Securities having the title “Enterprise Financial Services Corp 4.75% Fixed-to-Floating Rate Subordinated Notes due November 1, 2026” and the CUSIP number 293712 AA3.

(b) Principal Amount . The aggregate principal amount of the 2026 Notes that may be authenticated and delivered under the Indenture, as amended hereby, shall be Fifty Million Dollars ($50,000,000) on the Issue Date. Provided that no Event of Default has occurred and is continuing with respect to the 2026 Notes, the Company may, without notice to or the consent of the Holders, create and issue additional Securities having the same terms as, and ranking equally and ratably with, the 2026 Notes in all respects and so that such additional 2026 Notes will be consolidated and form a single series with, and have the same terms as to status, redemption or otherwise as, the 2026 Notes initially issued, provided that such additional 2026 Notes are fungible for U.S. federal income tax purposes with the 2026 Notes.

(c) Person to Whom Interest is Payable . Interest payable, and punctually paid or duly provided for, on any Interest Payment Date will be paid to the person in whose name the 2026 Notes are registered for such interest at the close of business on the 15th day of the month immediately preceding the applicable Interest Payment Date, whether or not such day is a Business Day. Any such interest which is payable, but not so punctually paid or duly provided for on any Interest Payment Date shall cease to be payable to the Holder on such relevant record date by virtue of having been a Holder on such date, and such defaulted interest may be paid by the Company to the person in whose name the 2026 Note is registered at the close of business on a special record date for the payment of such defaulted

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interest to be fixed by the Company, notice whereof shall be given to Holders of 2026 Notes of this series not less than 10 days prior to such special record date that complies with Section 307 of the Base Indenture, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange on which the 2026 Notes may be listed and upon such notice as may be required by such exchange and in compliance with the Base Indenture.

(d) Maturity Date . The entire outstanding Principal of the 2026 Notes shall be payable on November 1, 2026 (the “ Maturity Date ”).

(e) Interest .

(i) The 2026 Notes will bear interest at a fixed rate of 4.75% per annum from and including November 1, 2016 to, but excluding, November 1, 2021 (the “Fixed Rate Period” ). Interest accrued on the 2026 Notes during the Fixed Rate Period will be payable semi-annually in arrears on May 1 and November 1 of each year, commencing on May 1, 2017 (each such date a “Fixed Rate Interest Payment Date” ). The interest payable during the Fixed Rate Period will be paid to each holder in whose name a 2026 Note is registered at the close of business on the fifteenth day (whether or not a Business Day) of the month immediately preceding the applicable Fixed Rate Interest Payment Date (each such date, a “Fixed Rate Regular Record Date” ).

(ii) The 2026 Notes will bear a floating interest rate from and including November 1, 2021 to the Maturity Date or Redemption Date (the “Floating Rate Period” ). The floating interest rate will be reset quarterly, and the interest rate for any Floating Rate Period shall be equal to Three-Month LIBOR plus 3.387%. During the Floating Rate Period, interest on the 2026 Notes will be payable quarterly in arrears on February 1, May 1, August 1 and November 1 of each year commencing on February 1, 2022 through the Maturity Date or Redemption Date (each such date, a “Floating Rate Interest Payment Date” , together with a Fixed Rate Interest Payment Date, an “Interest Payment Date” ). The interest payable during the Floating Rate Period will be paid to each holder in whose name a Note is registered at the close of business on the fifteenth day (whether or not a Business Day) of the month immediately preceding the applicable Floating Rate Interest Payment Date (each such date, a “Floating Rate Regular Record Date” ).

(iii) The amount of interest payable on any Fixed Rate Interest Payment Date during the Fixed Rate Period will be computed on the basis of a 360-day year consisting of twelve 30-day months up to, but excluding November 1, 2021, and, the amount of interest payable on any Floating Rate Interest Payment Date during the Floating Rate Period will be computed on the basis of a 360-day year and the number of days actually elapsed. In the event that any scheduled Interest Payment Date for the 2026 Notes falls on a day that is not a Business Day, then payment of interest payable on such Interest Payment Date will be paid on the next succeeding day which is a Business Day (any payment made on such date will be treated as being made on the date that the payment was first due and no interest on such payment will accrue for the period from and after such scheduled Interest Payment Date); provided, that in the event that any scheduled Floating Rate Interest Payment Date falls on a day that is not a Business Day and the next succeeding Business Day falls in the next succeeding calendar month, such Floating Rate Interest Payment Date will be accelerated to the immediately preceding Business Day, and, in each such case, the amounts payable on such Business Day will include interest accrued to but excluding such Business Day. Dollar amounts resulting from interest calculations will be rounded to the nearest cent, with one-half cent being rounded upward.

(iv) The Company agrees that for so long as any of the 2026 Notes are outstanding there will at all times be an agent appointed to calculate Three-Month LIBOR in respect of each Floating Rate Period (the “ Calculation Agent ”). The calculation of Three-Month LIBOR for each applicable Floating Rate Period by the Calculation Agent will (in the absence of manifest error) be final and binding. The Calculation Agent shall have all the rights, protections and indemnities afforded to the Trustee under the Base Indenture and hereunder. The Company hereby appoints U.S. Bank National Association as Calculation Agent for the purposes of determining Three-Month LIBOR for each Floating Interest Period and U.S. Bank National Association accepts the appointment. The Calculation Agent may be removed by the Company at any time. If the Calculation Agent is unable or unwilling to act as Calculation Agent or is removed by the Company, the Company will promptly appoint a replacement Calculation Agent, which does not control or is not controlled by or under common control with the Company or its Affiliates. The Calculation Agent may not resign its duties without a successor having been duly appointed; provided, that if a successor Calculation Agent has not been appointed by the Company or such successor has not accepted such position within

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30 days after the giving of notice of resignation by the Calculation Agent, the resigning Calculation Agent may petition, at the expense of the Company, any court of competent jurisdiction for the appointment of a successor Calculation Agent with respect to such series. The Calculation Agent’s calculation of the amount of any interest payable after the first Reset Rate Determination Date will be maintained on file at the Calculation Agent’s principal offices.

(f) Place of Payment of Principal and Interest . So long as the 2026 Notes shall be issued in global form, the Company shall make, or cause the Paying Agent to make, all payments of principal and interest on the 2026 Notes by wire transfer in immediately available funds to the Depository or its nominee, in accordance with applicable procedures of the Depository. If the 2026 Notes are not in global form, the Company, may, at its option, make, or cause the Paying Agent to make, payments of principal and interest on the 2026 Notes by check mailed to the address of the person specified for payment in accordance with Section 3.02(e)(i) and (e)(ii) above. A global security with respect to the 2026 Notes shall be exchangeable for physical securities of such series only in accordance with Section 305 of the Base Indenture (as amended hereby). The provisions regarding Global Security registration (provided for in eighth and ninth (8 ^th and 9 ^th ) paragraphs of Section 305 of the Base Indenture) shall apply to the 2026 Notes, provided that (i) the text of the eighth (8 ^th ) paragraph of Section 305 of the Base Indenture shall be substituted in its entirety with the following:

“Each Global Security authenticated under this Indenture shall be registered in the name of the Depositary designated for such Global Security or a nominee thereof and delivered to such Depositary or a custodian therefor, and each such Global Security shall constitute a single Security for all purposes of this Indenture. Notwithstanding the foregoing, except as otherwise specified as contemplated by Section 301, no Global Security shall be registered for transfer or exchange, or authenticated or delivered, pursuant to this Section 305 or Sections 304, 306, 1206 or 406 in the name of a Person other than the Depositary for such Security or its nominee until (i) the Depositary with respect to a Global Security notifies the Company that it is unwilling or unable to continue as Depositary for such Global Security or the Depositary ceases to be a clearing agency registered under the Exchange Act and, in either such event, the Company notifies the Trustee that it is unable to appoint a successor Depositary within 90 days of any such event, or (ii) the Company executes and delivers to the Trustee a Company Order that such Global Security shall be so transferable and exchangeable. Upon the occurrence in respect of any Global Security of any series of any one or more of the conditions specified in clauses (i) or (ii) of the preceding sentence or such other conditions as may be specified as contemplated by Section 301 for such series, such Global Security may be registered for transfer or exchange for Securities registered in the names of, or authenticated and delivered to, such Persons as the Depositary with respect to such series shall direct.”

(g) Redemption . The 2026 Notes shall be redeemable, in each case, in whole or in part from time to time, at the option of the Company prior to the Maturity Date beginning with the Interest Payment Date on November 1, 2021, and on any Interest Payment Date thereafter subject to obtaining the prior approval of the Federal Reserve to the extent such approval is required under the rules of the Federal Reserve. The 2026 Notes may not otherwise be redeemed prior to the Maturity Date, except that the Company may, at its option, redeem the 2026 Notes before the Maturity Date in whole or in part from time to time, upon the occurrence of a Tier 2 Capital Event or a Tax Event, or if the Company is required to register as an investment company pursuant to the Investment Company Act of 1940, as amended (15 U.S.C. 80a-1 et seq.). Any such redemption will be at a Redemption Price equal to 100% of the principal amount of the 2026 Notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date fixed by the Company. The provisions of Article 4 of the Base Indenture shall apply to any redemption of the 2026 Notes pursuant to this Article 3. Any partial redemption will be made in accordance with The Depository Trust Company’s (“ DTC ”) applicable procedures among all of the Holders of the 2026 Notes. If any 2026 Note is to be redeemed in part only, the notice of redemption relating to such 2026 Note shall state that it is a partial redemption and the portion of the principal amount thereof to be redeemed. The 2026 Notes are not subject to redemption or prepayment at the option of the Holders.

(h) Sinking Fund . There shall be no sinking fund for the 2026 Notes.

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(i) Denomination . The 2026 Notes and any beneficial interest in the 2026 Notes shall be in minimum denominations of $1,000 and integral multiples of $1,000 in excess thereof.

(j) Currency of the 2026 Notes . The 2026 Notes shall be denominated, and payment of principal and interest of the 2026 Notes shall be payable in, the currency of the United States of America.

(k) Acceleration . Neither the Trustee nor the Holders of the 2026 Notes shall have the right to accelerate the maturity of the 2026 Notes unless there is an Event of Default specified under clause (d), (e) or (g) of Section 801 (as amended herein) of the Base Indenture. If an Event of Default specified in clause (d), (e) or (g) of Section 801 (as amended herein) of the Base Indenture occurs, then the principal amount of all of the outstanding 2026 Notes, including any accrued and unpaid interest on the 2026 Notes and premium, if any, shall automatically become and be immediately due and payable without any declaration or other act on the part of the Trustee or the Holders of the 2026 Notes in accordance with the provisions of Section 801 of the Base Indenture.

(l) Stated Maturity . The principal of the 2026 Notes shall be payable on November 1, 2026 subject to acceleration or earlier redemption as provided under the Indenture.

(m) Registered Form . The 2026 Notes shall be issuable as registered global Securities, and the U.S. Depository for the 2026 Notes shall be the DTC or any successor U.S. Depository appointed by the Company within 90 days of the termination of services of DTC (or any successor to DTC). Article 2 and Section 304 of the Base Indenture shall apply to the 2026 Notes.

(n) Events of Default . The Events of Default provided for in Section 801 of the Base Indenture shall apply to the 2026 Notes, provided that:

(i) the text of clause (d) of Section 801 of the Base Indenture shall be substituted with the following:

“(d) A court having jurisdiction in the premises shall enter a decree or order for the appointment of a Custodian in any receivership, insolvency, liquidation, or similar proceeding relating to the Company, and such decree or order shall remain unstayed and in effect for a period of 60 consecutive days;” and

(ii) the text of clause (e) of Section 801 of the Base Indenture shall be substituted with the following:

“(e) The Company shall consent to the appointment of a Custodian in any receivership, insolvency, liquidation or similar proceeding with respect to the Company;”

(iii) a new clause (g), reading in its entirety as follows, shall be inserted:

“(g) in the event of an appointment of a Custodian for our principal banking subsidiary, and such appointment shall not have been rescinded for a period of 60 consecutive days from the date thereof.”

(o) Acceleration, Rescission and Annulment . Section 802 of the Base Indenture shall apply to the 2026 Notes, except that the first paragraph thereof shall be substituted with the following:

“If an Event of Default specified in Sections 801(i), 801(j) or 801(1) occurs, the principal amount of all the 2026 Notes, together with accrued and unpaid interest, if any, thereon, shall automatically, and without any declaration or other action on the part of the Trustee or any Holder, become immediately due and payable. The Maturity of the 2026 Notes shall not otherwise be accelerated as a result of an Event of Default.”

(p) Ranking . The 2026 Notes shall rank junior to and shall be subordinated to all Senior Indebtedness of the Company, whether existing as of the date of this First Supplemental Indenture, or hereafter issued or incurred, including all indebtedness relating to money owed to general creditors and trade creditors. The 2026 Notes shall rank senior to the Company’s junior subordinated indebtedness. Subject to the terms of the Base Indenture, if the Trustee or any holder of any of the 2026 Notes receives any payment or distribution of the Company’s assets in contravention of the subordination provisions applicable to the 2026 Notes before all Senior Indebtedness is paid in full in cash, property or securities, including by way of set-off or any such payment or distribution that may be

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payable or deliverable by reason of the payment of any other indebtedness of the Company being subordinated to the payment of the 2026 Notes, then such payment or distribution will be held in trust for the benefit of holders of Senior Indebtedness or their representatives to the extent necessary to make payment in full in cash or payment satisfactory to the holders of Senior Indebtedness of all unpaid Senior Indebtedness.

(q) Limitation on Suits . Section 807 of the Base Indenture shall apply to the 2026 Notes, except that the text in clause (b) of Section 807 shall be substituted with the following:

“(b) the Holders of not less than 25% in aggregate principal amount of the 2026 Notes then Outstanding in respect of which an Event of Default shall have occurred and be continuing, shall have made written request to the Trustee to institute proceedings in respect of such Event of Default in its own name as Trustee hereunder;”

(r) No Collateral . The 2026 Notes shall not be entitled to the benefit of any security interest in, or collateralization by, any rights, property or interest of the Company.

(s) Additional Terms . Other terms applicable to the 2026 Notes are as otherwise provided for in the Base Indenture, as supplemented by this First Supplemental Indenture.

ARTICLE IV

SUPPLEMENTAL INDENTURES

Section 4.01. Supplemental Indentures . The following paragraph shall be added to the end of Section 1202 of the Base Indenture and shall only apply to the 2026 Notes:

“Not in limitation of the foregoing, without the consent of any Holder of 2026 Notes, the Company and the Trustee may amend or supplement the Indenture or the 2026 Notes to conform the terms of the Indenture and the 2026 Notes to the description of the 2026 Notes in the prospectus supplement dated October 27, 2016 relating to the offering of the 2026 Notes.”

ARTICLE V

MISCELLANEOUS

Section 5.01. Trust Indenture Act . This First Supplemental Indenture is subject to the provisions of the Trust Indenture Act that are required to be part of the Indenture and shall, to the extent applicable, be governed by such provisions. If any provision of this First Supplemental Indenture limits, qualifies, or conflicts with a provision of the Trust Indenture Act that is required under such act to be a part of and govern this First Supplemental Indenture, the latter provision shall control.

SECTION 5.02. GOVERNING LAW . THE LAWS OF THE STATE OF NEW YORK SHALL GOVERN THIS FIRST SUPPLEMENTAL INDENTURE AND THE 2026 NOTES.

Section 5.03. Duplicate Originals . The parties may sign any number of copies of this First Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

Section 5.04. Severability . In case any provision in this First Supplemental Indenture or the 2026 Notes shall be invalid, illegal or unenforceable, the validity, legality and enforceability of the remaining provisions shall not in any way be affected or impaired thereby.

Section 5.05. Ratification . The Base Indenture, as supplemented and amended by this First Supplemental Indenture, is in all respects ratified and confirmed. The Base Indenture and this First Supplemental Indenture shall be read, taken and construed as one and the same instrument. All provisions included in this First Supplemental Indenture supersede any conflicting provisions included in the Base Indenture unless not permitted by law. The Trustee accepts the trusts created by the Base Indenture, as supplemented by this First Supplemental Indenture, and agrees to perform the same upon the terms and conditions of the Base Indenture, as supplemented by this First Supplemental Indenture.

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Section 5.06. Effectiveness . The provisions of this First Supplemental Indenture shall become effective as of the date hereof.

Section 5.07. Successors . All agreements of the Company in this First Supplemental Indenture shall bind its successors. All agreements of the Trustee in this First Supplemental Indenture shall bind its successors.

Section 5.08. Indenture and Notes Solely Corporate Obligations . No recourse for the payment of the principal of or interest on any 2026 Note, or for any claim based thereon or otherwise in respect thereof, shall be had against any shareholder, employee, agent, officer or director, as such, past, present or future, of the Company or of any successor Person; 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 First Supplemental Indenture and the issue of the 2026 Notes.

Section 5.09. Trustee’s Disclaimer . The recitals contained herein shall be taken as the statements of the Company and the Trustee assumes no responsibility for their correctness. The Trustee shall not be responsible in any manner whatsoever for or in respect of the validity or sufficiency of this First Supplemental Indenture, the 2026 Notes, or for or in respect of the recitals contained herein, all of which recitals are made solely by the Company.

Section 5.10. USA PATRIOT Act . The parties hereto acknowledge that in accordance with Section 326 of the USA PATRIOT Act the Trustee, like all financial institutions and in order to help fight the funding of terrorism and money laundering, are required to obtain, verify, and record information that identifies each person or legal entity that establishes a relationship or opens an account. The parties to this agreement agree that they shall provide the Trustee with such information as they may request in order to satisfy the requirements of the USA PATRIOT Act.

[Remainder of page intentionally left blank.]

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

[Signature Page to First Supplemental Indenture]

[Signature Page to First Supplemental Indenture]

Exhibit 4.3

FORM OF NOTE

THIS SECURITY AND THE OBLIGATIONS OF THE COMPANY (AS DEFINED HEREIN) AS EVIDENCED HEREBY (1) ARE NOT DEPOSITS WITH OR HELD BY THE COMPANY AND ARE NOT INSURED OR GUARANTEED BY ANY FEDERAL AGENCY OR INSTRUMENTALITY, INCLUDING, WITHOUT LIMITATION, THE FEDERAL DEPOSIT INSURANCE CORPORATION, AND (2) ARE SUBORDINATE IN THE RIGHT OF PAYMENT TO THE SENIOR INDEBTEDNESS (AS DEFINED IN THE INDENTURE IDENTIFIED HEREIN).

GLOBAL NOTE

THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF THE DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY MAY NOT BE EXCHANGED IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED IN THE NAME OF ANY PERSON OTHER THAN THE DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES DESCRIBED IN THE INDENTURE.

UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR THE INDIVIDUAL SECURITIES REPRESENTED HEREBY, THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE (I) BY THE DEPOSITARY TO A NOMINEE OF THE DEPOSITARY OR (II) BY A NOMINEE OF THE DEPOSITARY OR THE DEPOSITARY TO A SUCCESSOR DEPOSITARY OR A NOMINEE OF SUCH SUCCESSOR DEPOSITARY. UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR SUCH OTHER NAME AS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY AND ANY PAYMENT IS MADE TO CEDE & CO., ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.

TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, 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

ENTERPRISE FINANCIAL SERVICES CORP

4.75% FIXED-TO-FLOATING RATE SUBORDINATED NOTE DUE NOVEMBER 1, 2026

CUSIP NO. 293712 AA3

ISIN NO. US293712AA32

Enterprise Financial Services Corp, a Delaware corporation (hereinafter called the “Company,” which term includes any successor corporation under the Indenture hereinafter referred to), for value received, hereby promises to pay to CEDE & CO., or its registered assigns, the principal sum of $50,000,000 (or such other amount as set forth in the Schedule of Increases or Decreases in Global Note attached hereto) on November 1, 2026 (such date is hereinafter referred to as the “Stated Maturity Date”), unless redeemed prior to such date, and to pay interest thereon (i) from, and including, November 1, 2016, to, but excluding, November 1, 2021, unless redeemed prior to such date, at a rate of 4.75% per annum, semi-annually in arrears on May 1 and November 1 of each year, commencing May 1, 2017 (each such date, a “Fixed Rate Interest Payment Date,” with the period from, and including, November 1, 2016 to, but excluding, the first Fixed Rate Interest Payment Date and each successive period from,

and including, a Fixed Rate Interest Payment Date to, but excluding, the next Fixed Rate Interest Payment Date being a “Fixed Rate Period”) and (ii) from, and including, November 1, 2021 to, but excluding, the Stated Maturity Date, unless redeemed subsequent to September 30, 2021 but prior to the Stated Maturity Date, at a rate equal to Three-month LIBOR, reset quarterly, plus 338.7 basis points (3.387%), payable quarterly in arrears on February 1, May 1, August 1, and November 1 of each year through the Stated Maturity Date or earlier redemption date (each, a “Floating Rate Interest Payment Date,” and together with the Fixed Rate Interest Payment Dates, the “Interest Payment Dates,” with the period from, and including, November 1, 2021 to, but excluding, the first Floating Rate Interest Payment Date and each successive period from, and including a Floating Rate Interest Payment Date to, but excluding, the next Floating Rate Interest Payment Date being a “Floating Rate Period”). The amount of interest payable on any Fixed Rate Interest Payment Date during the Fixed Rate Period will be computed on the basis of a 360-day year consisting of twelve 30-day months up to, but excluding November 1, 2021, and, the amount of interest payable on any Floating Rate Interest Payment Date during the Floating Rate Period will be computed on the basis of a 360-day year and the number of days actually elapsed. In the event that any scheduled Interest Payment Date for this Note falls on a day that is not a Business Day, then payment of interest payable on such Interest Payment Date will be paid on the next succeeding day which is a Business Day (any payment made on such date will be treated as being made on the date that the payment was first due and no interest on such payment will accrue for the period from and after such scheduled Interest Payment Date); provided, that in the event that any scheduled Floating Rate Interest Payment Date falls on a day that is not a Business Day and the next succeeding Business Day falls in the next succeeding calendar month, such Floating Rate Interest Payment Date will be accelerated to the immediately preceding Business Day, and, in each such case, the amounts payable on such Business Day will include interest accrued to but excluding such Business Day. All percentages used in or resulting from any calculation of Three-month LIBOR shall be rounded, if necessary, to the nearest one hundred-thousandth of a percentage point, with 0.000005% rounded up to 0.00001%.

Any principal and premium, and any such installment of interest, which is overdue shall bear interest at the applicable rate set forth in the previous paragraph (to the extent that the payment of such interest shall be legally enforceable), from the dates such amounts are due until they are paid or made available for payment, and such interest shall be payable on demand. The interest so payable, and punctually paid or duly provided for, on any Interest Payment Date will, as provided in the Indenture, be paid to the Person in whose name this Note is registered at the close of business on the 15th day of the month (whether or not a Business Day) immediately preceding such Interest Payment Date.

Payment of the principal of and interest on this Note will be made at the office or agency of the Company maintained for that purpose, which shall initially be the Corporate Trust Office of the Trustee, in such currency of the United States of America as at the time of payment is legal tender for payment of public and private debts.

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

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

[ Remainder of this page intentionally left blank. Signature page follows. ]

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

Dated:

CERTIFICATE OF AUTHENTICATION

This is one of the Securities of the series designated therein referred to in the within-mentioned Indenture.

[ Signatures Page to Global Note ]

[FORM OF REVERSE OF NOTE]

ENTERPRISE FINANCIAL SERVICES CORP

4.75% Fixed-to-Floating Rate Subordinated Notes due November 1, 2026

This Note is one of a duly authorized issue of Securities of the Company of a series designated as the “4.75% Fixed-to-Floating Rate Subordinated Notes due 2026” (herein called the “Notes”) initially issued in an aggregate principal amount of $50,000,000 on November 1, 2016. Such series of Securities has been established pursuant to, and is one of an indefinite number of series of subordinated debt securities of the Company issued or issuable under and pursuant to the Subordinated Debt Securities Indenture, dated as of November 1, 2016 (the “Base Indenture”), between the Company and U.S. Bank National Association, as Trustee (herein called the “Trustee,” which term includes any successor trustee), as supplemented and amended by the First Supplemental Indenture between the Company and the Trustee, dated as of November 1, 2016 (the “First Supplemental Indenture,” and the Base Indenture as supplemented and amended by the First Supplemental Indenture, the “Indenture”), to which Indenture and any other indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Persons in whose names Notes are registered from time to time and of the terms upon which the Notes are, and are to be, authenticated and delivered. The terms, conditions and provisions of the Notes are those stated in the Indenture, those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”), and those set forth in this Note. To the extent that the terms, conditions and provisions of this Note modify, supplement or are inconsistent with those of the Indenture, then the terms, conditions and other provisions of this Note shall govern to the extent that such terms, conditions and other provisions of this Note are not inconsistent with the terms, conditions and provisions made part of the Indenture by reference to the Trust Indenture Act.

All capitalized terms used in this Note and not defined herein that are defined in the Indenture shall have the meanings assigned to them in the Indenture. To the extent that any capitalized term used in this Note and defined herein is also defined in the Indenture but conflicts with the definition provided in the Indenture, the definition of the capitalized term in this Note shall control.

The indebtedness of the Company evidenced by the Notes, including the principal thereof, premium, if any, Additional Amounts, if any, and interest thereon, is, to the extent and in the manner set forth in the Indenture, subordinate and subject in right of payment to the prior payment in full of all Senior Indebtedness, whether outstanding at the date hereof or hereafter incurred, and on the terms and subject to the terms and conditions set forth in the Indenture, and shall rank pari passu in right of payment with all other Securities and with all other unsecured subordinated indebtedness of the Company and not by its terms subordinate and subject in right of payment to the prior payment in full of debentures, notes, bonds or other evidences of indebtedness of types that include the Notes. Each Holder of this Note, by the acceptance hereof, agrees to and shall be bound by such provisions of the Indenture and authorizes and directs the Trustee on his behalf to take such actions as may be necessary or appropriate to effectuate the subordination so provided.

The Notes are intended to be treated as Tier 2 capital (or its then-equivalent if the Company were subject to such capital requirement) for purposes of capital adequacy guidelines of the Board of Governors of the Federal Reserve System (or any successor regulatory authority with jurisdiction over bank holding companies) (the “Federal Reserve Board”) as then in effect and applicable to the Company. If an Event of Default with respect to Notes shall occur and be continuing, the principal and interest owed on the Notes shall only become due and payable in accordance with the terms and conditions set forth in Article 8 of the Base Indenture and Section 3.02(k) and (o) of the First Supplemental Indenture. Accordingly, the Holder of this Note has no right to accelerate the maturity of this Note in the event that the Company fails to pay interest on any of the Notes, or fails to perform any other obligations under the Notes or in the Indenture that are applicable to the Notes.

The Company may, at its option, redeem the Notes, in whole or in part, at a redemption price equal to 100% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest (the “Redemption Price”) to but excluding, the date of redemption (the “Redemption Date”), on any Interest Payment Date on or after November 1, 2021. The Company may also, at its option, redeem the Notes before the Stated Maturity Date, in whole or in part, at any time, upon the occurrence of a Tier 2 Capital Event, a Tax Event or a 1940 Act Event. Any such redemption will

be at a redemption price equal to the Redemption Price to, but excluding, the Redemption Date fixed by the Company. No redemption of the Notes by the Company prior to the Stated Maturity Date shall be made without the prior approval of the Federal Reserve Board if such prior approval is or will be required at the scheduled Redemption Date. The provisions of Article 4 of the Base Indenture and Section 3.02(g) of the First Supplemental Indenture shall apply to the redemption of any Notes by the Company.

The Notes are not entitled to the benefit of any sinking fund. The Notes are not convertible into or exchangeable for any other securities or property of the Company or any Subsidiary of the Company.

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

As provided in the Indenture and subject to certain limitations therein set forth, the transfer of this Note is registrable in the Register described in Section 305 of the Base Indenture, upon surrender of this Note for registration of transfer at the office or agency of the Company in any place where the principal of and interest on this Note are payable, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Company and the Registrar duly executed by the Holder hereof or the Holder’s attorney duly authorized in writing, and thereupon one or more new Notes, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.

The Notes are issuable only in registered form without coupons in minimum denominations of $1,000 and any integral multiples of $1,000 in excess thereof.

The Company and the Trustee and any agent of the Company or the Trustee may treat the Person in whose name this Note is registered as the owner hereof for all purposes, whether or not this Note is overdue, and neither the Company, the Trustee nor any such agent shall be affected by notice to the contrary.

This Security is a global note, represented by one or more permanent global certificates registered in the name of the nominee of The Depository Trust Company (each a “Global Note” and collectively, the “Global Notes”). Accordingly, unless and until it is exchanged for individual certificates, this Note may not be transferred except as a whole by The Depository Trust Company (the “Depositary”) to a nominee of such Depositary or by a nominee of such Depositary or by the Depositary or any nominee to a successor Depositary or any nominee of such successor. Ownership of beneficial interests in this Security will be shown on, and the transfer of that ownership will be effected only through, records maintained by the applicable Depositary or its nominee (with respect to interest of persons that have accounts with the Depositary (“Participants”)) and the records of Participants (with respect to interests of persons other than Participants). Beneficial interests in Notes owned by persons that hold through Participants will be evidenced only by, and transfers of such beneficial interests with such Participants will be effected only through, records maintained by such Participants. Except as provided below, owners of beneficial interests in this Note will not be entitled to have any individual certificates and will not be considered the owners or Holders thereof under the Indenture.

Except in the limited circumstances set forth in the Indenture, Participants and owners of beneficial interests in the Global Notes will not be entitled to receive Notes in the form of individual securities in definitive, non-global form registered in the name or names of persons other than the Depositary or a nominee or nominees thereof and will not be considered Holders of Notes. None of the Company, the Trustee, the Registrar, the Paying Agent or any of their respective agents will be liable for any delay by the Depositary, its nominee or any direct or indirect Participant in identifying the beneficial owners of the related Notes. The Company, the Trustee, the Registrar, the Paying Agent and each of their respective agents may conclusively rely on, and will be protected in relying on, instructions from the Depositary or its nominee for all purposes, including with respect to the registration and delivery, and the respective principal amounts, of the Notes to be issued.

Except as provided in Section 305 of the Indenture, beneficial owners of Global Notes will not be entitled to receive physical delivery of Notes in the form of physical certificates, and no Global Note will be exchangeable except for another Global Note of like denomination and tenor to be registered in the name of the Depositary or its nominee. Accordingly, each person owning a beneficial interest in a Global Note must rely on the procedures of the Depositary and, if such person is not a Participant, on the procedures of the Participant through which such person owns its interest, to exercise any rights of a Holder under the Notes.

The laws of some jurisdictions may require that certain purchasers of securities take physical delivery of those securities in definitive form. Accordingly, the ability to transfer interests in the Notes represented by a Global Note to those persons may be limited. In addition, because the Depositary can act only on behalf of its Participants, who in turn act on behalf of persons who hold interests through Participants, the ability of a person having an interest in Notes represented by a Global Note to pledge or transfer such interest to persons or entities that do not participate in the Depositary’s system, or otherwise to take actions in respect of such interest, may be affected by the lack of a physical definitive security in respect of such interest. None of the Company, the Trustee, the Paying Agent and the Registrar will have any responsibility or liability for any aspect of the records relating to or payments made on account of Notes by the Depositary, or for maintaining, supervising or reviewing any records of the Depositary relating to the Notes.

The Trustee will act as the Company’s Paying Agent with respect to the Notes through its Corporate Trust Office presently located at 50 S 16th St, Suite 2000, Philadelphia, PA 19102. The Company may at any time rescind the designation of a Paying Agent, appoint a successor Paying Agent, or approve a change in the office through which any Paying Agent acts.

Notices to the Holders of registered Notes in the form of Individual Securities will be given to such Holders at their respective addresses in the Register, or in the case of Global Notes, electronic delivery in accordance with DTC’s applicable procedures. The Indenture contains provisions setting forth certain conditions to the institution of proceedings by the Holders of Notes with respect to the Indenture or for any remedy under the Indenture.

THIS NOTE SHALL BE DEEMED TO BE A CONTRACT MADE UNDER THE LAWS OF THE STATE OF NEW YORK.

FORM OF ASSIGNMENT

For value received                  hereby sell(s), assign(s) and transfer(s) unto                  (Please insert social security or other identifying number of assignee) the within Note, and hereby irrevocably constitutes and appoints                  as attorney to transfer the said Note on the books of the Company, with full power of substitution in the premises.