# EDGAR Filing Document

**Accession Number:** 0001002910
**File Stem:** 0001104659-26-023352
**Filing Date:** 2026-3
**Character Count:** 169794
**Document Hash:** 1e04b4ae4eb72eb4f8280dde5c0f1e4b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-26-023352.hdr.sgml**: 20260304

**ACCESSION NUMBER**: 0001104659-26-023352

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 24

**CONFORMED PERIOD OF REPORT**: 20260304

**ITEM INFORMATION**: Other Events

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260304

**DATE AS OF CHANGE**: 20260304

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** AMEREN CORP
- **CENTRAL INDEX KEY:** 0001002910
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC & OTHER SERVICES COMBINED [4931]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 431723446
- **STATE OF INCORPORATION:** MO
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-14756
- **FILM NUMBER:** 26720074

**BUSINESS ADDRESS:**
- **STREET 1:** 1901 CHOUTEAU AVE
- **STREET 2:** MC 1310
- **CITY:** ST LOUIS
- **STATE:** MO
- **ZIP:** 63166-6149
- **BUSINESS PHONE:** 314-621-3222

**MAIL ADDRESS:**
- **STREET 1:** 1901 CHOUTEAU AVE
- **STREET 2:** MC 1310
- **CITY:** ST LOUIS
- **STATE:** MO
- **ZIP:** 63103

?xml version='1.0' encoding='ASCII'?

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K**

**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the**

**Securities Exchange Act of 1934**

**Date of report (Date of earliest event reported): March 4, 2026**

**AMEREN CORPORATION**

**(Exact name of registrant as specified in its charter)**

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Missouri** | &nbsp;&nbsp;**1-14756** | &nbsp;&nbsp;**43-1723446** |
| &nbsp;&nbsp;**(State or other jurisdiction of <br> incorporation)** | &nbsp;&nbsp;**(Commission File Number)** | &nbsp;&nbsp; **(I.R.S. Employer<br> Identification No.)** |

---

**1901 Chouteau Avenue, St. Louis, Missouri 63103**

**(Address of principal executive offices and Zip Code)**

**Registrant's telephone number, including area code: (314) 621-3222**

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

◻ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

◻ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

◻ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

◻ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | |
|:---|:---|
| &nbsp;&nbsp;**Title of each class** | &nbsp;&nbsp;**Name of each exchange on which registered** |
| &nbsp;&nbsp; **Common Stock, $0.01 par value per share**<br> &nbsp;&nbsp; **AEE** | &nbsp;&nbsp; **New York Stock Exchange** |

---

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ◻

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ◻

---

| | |
|:---|:---|
| **ITEM 8.01** | **Other Events.** |

---

On March 4, 2026, Ameren Corporation ("Ameren") sold $400 million principal amount of its 5.00% Senior Notes due 2036 (the "Notes"). The Notes were offered pursuant to a Registration Statement on Form S-3 (File No. 333-274977), which became effective on October 13, 2023, and a Prospectus Supplement dated February 26, 2026, to a Prospectus dated October 13, 2023. Ameren received net offering proceeds of approximately $396.6 million, before expenses, upon closing of the transaction.

This Current Report on Form 8-K is being filed to report as exhibits certain documents in connection with the offering of the Notes.

---

| | |
|:---|:---|
| **ITEM 9.01** | **Financial Statements and Exhibits.** |

---

(d) Exhibits

Exhibit Number Title

---

| | |
|:---|:---|
| [1](tm267933d1_ex1.htm) | [Underwriting Agreement, dated February 26, 2026, between Ameren and BNY Mellon Capital Markets, LLC, J.P. Morgan Securities LLC, RBC Capital Markets, LLC, U.S. Bancorp Investments, Inc. and Wells Fargo Securities, LLC, as the several underwriters named therein.](tm267933d1_ex1.htm) |

---

---

| | |
|:---|:---|
| [4.1\*](https://www.sec.gov/Archives/edgar/data/1002910/000091205702003420/a2068781zex-4_5.txt) | [Indenture, dated as of December 1, 2001, by and between Ameren and The Bank of New York Mellon Trust Company, N.A., as successor trustee, ("Ameren Indenture") (Exhibit 4.5, File No. 333-81774).](https://www.sec.gov/Archives/edgar/data/1002910/000091205702003420/a2068781zex-4_5.txt) |

---

---

| | |
|:---|:---|
| [4.2\*](https://www.sec.gov/Archives/edgar/data/18651/000100291008000126/exhibit4_1.htm) | [First Supplemental Indenture, dated as of May 19, 2008, to the Ameren Indenture (June 30, 2008 Form 10-Q, Exhibit 4.1, File No. 1-14756).](https://www.sec.gov/Archives/edgar/data/18651/000100291008000126/exhibit4_1.htm) |

---

[4.3](tm267933d1_ex4-3.htm) [Company Order, dated March 4, 2026, establishing the Notes.](tm267933d1_ex4-3.htm)

[4.4](tm267933d1_ex4-4.htm) [Global Note.](tm267933d1_ex4-4.htm)

[5.1](tm267933d1_ex5-1.htm) [Opinion of Stephen C. Lee, Esq., Vice President and Deputy General Counsel of Ameren, regarding the legality of the Notes (including consent).](tm267933d1_ex5-1.htm)

[5.2](tm267933d1_ex5-2.htm) [Opinion of Morgan, Lewis & Bockius LLP regarding the legality of the Notes (including consent).](tm267933d1_ex5-2.htm)

104 Cover Page Interactive Data File (formatted as Inline XBRL).

\* Incorporated by reference as indicated.

**SIGNATURES**

Pursuant to the requirements of the Securities Exchange Act of 1934, Ameren has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | |
|:---|:---|
| AMEREN CORPORATION | AMEREN CORPORATION |
| (Registrant) |  |
| By: | /s/ Leonard P. Singh |
| Name: | Leonard P. Singh |
| Title: | Executive Vice President and Chief Financial Officer |

---

Date: March 4, 2026

## Ex-1

**Exhibit 1**

**Ameren Corporation**

**$400,000,000 5.00% Senior Notes due 2036**

<u>Underwriting Agreement</u>

February 26, 2026

BNY Mellon Capital Markets, LLC

240 Greenwich Street, 3W

New York, New York 10286

J.P. Morgan Securities LLC

270 Park Avenue

New York, New York 10017

RBC Capital Markets, LLC

Brookfield Place

200 Vesey Street, 8th Floor

New York, New York 10281

U.S. Bancorp Investments, Inc.

214 North Tryon Street, 26th Floor

Charlotte, North Carolina 28202

Wells Fargo Securities, LLC

550 South Tryon Street, 5th Floor

Charlotte, North Carolina 28202

Ladies and Gentlemen:

Ameren Corporation, a Missouri corporation (the "**Company**"), proposes, subject to the terms and conditions stated herein, to issue and sell to BNY Mellon Capital Markets, LLC, J.P. Morgan Securities LLC, RBC Capital Markets, LLC, U.S. Bancorp Investments, Inc. and Wells Fargo Securities, LLC (the "**Underwriters**"), an aggregate of $400,000,000 principal amount of the Company's 5.00% Senior Notes due 2036 (the "**Securities**").

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. <u>Representations and Warranties of the Company</u>. The Company represents and warrants to, and agrees with, each of the Underwriters that:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The Company meets the requirements for the use of an "automatic shelf registration statement", as defined in Rule 405 under the Securities Act of 1933, as amended (the "**1933 Act**"), and such registration statement on Form S-3 (File No. 333-274977) in respect of the Securities has been filed with the Securities and Exchange Commission (the "**SEC**") not earlier than three years prior to the date hereof; such registration statement, and any post-effective amendment thereto, became effective on filing with the SEC; no stop order suspending the effectiveness of such registration statement, any post-effective amendment thereto or any part thereof has been issued and no proceeding for that purpose or pursuant to Section 8A of the 1933 Act against the Company or relating to the offering of the Securities has been initiated or threatened by the SEC, and no notice of objection of the SEC to the use of such registration statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the 1933 Act has been received by the Company (any prospectus related to the Company included in such registration statement at the time it became effective that omits Rule 430 Information (as defined herein) is hereinafter called a "**Base Prospectus**"; any preliminary prospectus supplement (together with the accompanying Base Prospectus) used in connection with the offering and sale of the Securities that is deemed to be part of and included in such registration statement pursuant to Rule 430B(e) under the 1933 Act is hereinafter called a "**Preliminary Prospectus**"); the various parts of such registration statement and any post-effective amendment thereto, including all exhibits thereto and the documents incorporated by reference in the prospectus contained in such registration statement at the time each such part of such registration statement became effective, but excluding any Form T-1, each as amended at the time each such part of such registration statement became effective, and including any information omitted from such registration statement at the time each such part of such registration statement became effective, but that is deemed to be part of such registration statement pursuant to Rule 430A, Rule 430B or Rule 430C under the 1933 Act at the time set forth therein ("**Rule 430 Information**"), are hereinafter collectively called the "**Registration Statement**"; the Base Prospectus and prospectus supplement in the form first used (or made available upon request of purchasers pursuant to Rule 173 under the 1933 Act) in connection with confirmation of sales of the Securities and filed by the Company with the SEC pursuant to Rule 424(b) under the 1933 Act in accordance with Section 5(a) hereof is hereinafter called the "**Prospectus**"; any reference herein to the Registration Statement, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein, as of the effective date of the Registration Statement applicable to the Company and for the Securities pursuant to Rule 430B(f)(2) under the 1933 Act, the date of such Preliminary Prospectus or the date of the Prospectus, as the case may be; and any reference to any amendment or supplement to the Registration Statement, any Preliminary Prospectus or the Prospectus shall be deemed to include any documents filed after the effective date of the Registration Statement applicable to the Company and for the Securities pursuant to Rule 430B(f)(2) under the 1933 Act, the date of such Preliminary Prospectus or the date of the Prospectus, as the case may be, under the Securities Exchange Act of 1934, as amended (the "**1934 Act**"), and the rules and regulations of the SEC thereunder, and incorporated by reference in the Registration Statement, such Preliminary Prospectus or the Prospectus, as the case may be.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) No order preventing or suspending the use of any Preliminary Prospectus or any "issuer free writing prospectus" as defined in Rule 433 under the 1933 Act relating to the Securities (hereinafter called an "**Issuer Free Writing Prospectus**") has been issued by the SEC, and each Preliminary Prospectus, at the time of filing thereof, conformed in all material respects to the requirements of the 1933 Act and the Trust Indenture Act of 1939, as amended (the "**1939 Act**"), and the rules and regulations of the SEC thereunder, and did not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter expressly for use therein.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) For the purposes of this Agreement, the "**Applicable Time**" is 2:45 p.m., New York City time, on the date of this Agreement; a Preliminary Prospectus dated February 26, 2026, as amended or supplemented immediately prior to the Applicable Time (including the documents incorporated therein by reference as of the Applicable Time) (the "**Pricing Prospectus**") as supplemented by the final term sheet prepared and filed pursuant to Section 5(a) hereof, taken together (collectively, the "**Pricing Disclosure Package**") as of the Applicable Time and as of the Time of Delivery (as defined herein), did not and will not include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; and each Issuer Free Writing Prospectus listed on Schedule II(b) hereto does not conflict with the information contained in the Registration Statement, the Pricing Prospectus or the Prospectus and each such Issuer Free Writing Prospectus, as supplemented by and taken together with the Pricing Disclosure Package as of the Applicable Time, did not include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to statements or omissions made in an Issuer Free Writing Prospectus in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter expressly for use therein.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) The documents incorporated by reference in the Registration Statement, the Pricing Disclosure Package or the Prospectus, when they became effective or were filed with the SEC, as the case may be, conformed in all material respects to the requirements of the 1933 Act or the 1934 Act, as applicable, and the rules and regulations of the SEC thereunder, and none of such documents, as of such times, contained an untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; and any further documents so filed and incorporated by reference in the Registration Statement, the Pricing Disclosure Package or the Prospectus or any further amendment or supplement thereto, when such documents become effective or are filed with the SEC, as the case may be, will conform in all material respects to the requirements of the 1933 Act or the 1934 Act, as applicable, and the rules and regulations of the SEC thereunder and, as of such times, will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter expressly for use therein.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) The Registration Statement, the Pricing Prospectus and the Prospectus conform, and any further amendments or supplements to the Registration Statement, the Pricing Prospectus or the Prospectus will conform in all material respects to the requirements of the 1933 Act and the 1939 Act and the rules and regulations of the SEC thereunder and do not and will not, as of the latest date as of which any part of the Registration Statement relating to the Securities became, or is deemed to have become, effective under the 1933 Act in accordance with the rules and regulations of the SEC thereunder as to the Registration Statement and any amendment thereto, and as of their respective dates as to the Pricing Prospectus and the Prospectus and any amendment or supplement thereto, and as of the Time of Delivery as to the Prospectus, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with information furnished in writing to the Company by an Underwriter expressly for use in the Registration Statement, the Pricing Prospectus or the Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) The Securities have been duly authorized by the Company for issuance and sale to the Underwriters pursuant to this Agreement and, when executed and authenticated in accordance with the provisions of the Indenture (as defined below) and issued and delivered by the Company pursuant to this Agreement against payment of the consideration set forth herein, will constitute valid and legally binding obligations of the Company, enforceable against the Company in accordance with their terms and the terms of the Indenture, subject to the Exceptions (as defined below), and will be entitled to the benefits provided by the indenture, dated as of December 1, 2001, between the Company and The Bank of New York Mellon Trust Company, N.A. (as successor to The Bank of New York), as trustee (the "**Trustee**"), as supplemented by the First Supplemental Indenture, dated as of May 19, 2008, between the Company and the Trustee (as so supplemented, and including the terms of the Securities that will be established pursuant to a company order thereunder, the "**Indenture**"), under which they are to be issued, which is substantially in the form filed as an exhibit to the Registration Statement; the Indenture has been duly qualified under the 1939 Act and has been duly authorized by the Company, and, as of the Time of Delivery, will be duly executed and delivered by the Company, and will constitute a valid and legally binding agreement of the Company, enforceable against the Company in accordance with its terms, except as may be limited by (i) bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other similar laws relating to or affecting creditors' rights generally, (ii) general equitable principles (whether considered in a proceeding in equity or at law) and (iii) concepts of materiality, reasonableness, good faith and fair dealing and the discretion of the court before which any matter is brought (collectively, the "**Exceptions**"); and the Indenture conforms, and the Securities will conform, in all material respects to the descriptions thereof in the Pricing Disclosure Package and the Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(g) This Agreement has been duly authorized, executed and delivered by the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(h) The Company has been duly incorporated and is validly existing as a corporation and is in good standing under the laws of the State of Missouri, with corporate power and authority to own or lease its properties and conduct its business as described in the Pricing Prospectus and the Prospectus and to execute, deliver and perform its obligations under this Agreement and the Indenture and to do all and any of the acts necessary in connection with or arising from the transactions contemplated hereby and thereby; and the Company is duly qualified to do business as a foreign corporation and is in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except to the extent that the failure to be so qualified or to be in good standing would not, individually or in the aggregate, reasonably be expected to have a material adverse effect on the general affairs, management, financial position, shareholders' equity or consolidated results of operations of the Company and its subsidiaries, taken as a whole (a "**Material Adverse Effect**").

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Each significant subsidiary (as defined in Rule 405 under the 1933 Act) of the Company (as listed on Schedule III hereto) (each, a "**Significant Subsidiary**") has been duly incorporated and is validly existing and is in good standing under the laws of the jurisdiction of its incorporation, with corporate power and authority to own or lease its properties and conduct its business as described in the Pricing Prospectus and the Prospectus; each such Significant Subsidiary is duly qualified to do business and is in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except to the extent that the failure to be so qualified or to be in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect; and all of the issued and outstanding common stock of each Significant Subsidiary has been duly authorized and validly issued and is fully paid and nonassessable, and all of such common stock is owned by the Company, directly or indirectly, free from liens, encumbrances and defects of title.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(j) Neither the Company nor any of its subsidiaries has sustained, since the date of the latest audited consolidated financial statements incorporated by reference in the Pricing Prospectus and the Prospectus, any material loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, other than as set forth or contemplated in the Pricing Prospectus and the Prospectus, and since the respective dates as of which information is given in the Pricing Prospectus, (i) the Company has not incurred any liabilities or obligations, direct or contingent, or entered into any transactions, not in the ordinary course of business, that are material to the Company and (ii) there has not been any material adverse change, or any development involving a prospective material adverse change, in or affecting the general affairs, management, financial position, shareholders' equity or consolidated results of operations of the Company and its subsidiaries, taken as a whole, in each case, other than as set forth or contemplated in the Pricing Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(k) The issue and sale of the Securities by the Company, and the compliance by the Company with all of the provisions of the Securities, the Indenture and this Agreement applicable to the Company, and the consummation of the transactions herein and therein contemplated, will not (i) conflict with or result in a breach or violation of any of the terms or provisions of, or constitute a default under, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its Significant Subsidiaries is a party or by which the Company or any of its Significant Subsidiaries is bound or to which any of the property or assets of the Company or any of its Significant Subsidiaries is subject, (ii) result in any violation of the provisions of the articles of incorporation or by-laws of the Company or any of its Significant Subsidiaries or (iii) result in any violation of any statute or any order, rule or regulation of any court or governmental agency or body having jurisdiction over the Company or any of its Significant Subsidiaries or any of their properties, except, in the case of clauses (i) and (iii) above, for any such conflict, breach, violation or default that would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect or a material adverse effect on the consummation of the transactions contemplated by this Agreement or the Indenture; the execution, delivery and performance of the Securities, the Indenture and this Agreement and the consummation of the transactions herein and therein contemplated will not require the approval or consent of any holder or trustee of any debt or other obligations or securities of the Company which will not have been obtained; and no consent, approval, authorization, order, registration or qualification of or with any court or governmental agency or body is required for the issue and sale of the Securities by the Company, or the consummation by the Company of the transactions contemplated by this Agreement or the Indenture, except such as have been obtained or made under the 1933 Act and the 1939 Act and such consents, approvals, authorizations, orders, registrations or qualifications as may be required under state securities or blue sky laws of any jurisdiction (including any non-U.S. jurisdiction) in connection with the purchase and distribution of the Securities by the Underwriters.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(l) The Company has an authorized capitalization as set forth in the Pricing Prospectus and the Prospectus and all of the issued shares of capital stock of the Company have been duly and validly authorized and issued and are fully paid and non-assessable.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(m) Neither the Company nor any of its Significant Subsidiaries is (i) in violation of its articles of incorporation or by-laws, (ii) to the best knowledge of the Company, after due inquiry, other than as disclosed in the Pricing Prospectus and the Prospectus, in violation of any law, ordinance, administrative or governmental rule or regulation applicable to the Company or its Significant Subsidiaries (including, without limitation, such applicable laws, ordinances, administrative or governmental rules or regulations administered or promulgated by the Federal Energy Regulatory Commission, the Nuclear Regulatory Commission, the SEC, the Environmental Protection Agency, the Illinois Commerce Commission and the Missouri Public Service Commission), the violation of which would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, or of any decree of any court or governmental agency or body having jurisdiction over the Company or such Significant Subsidiaries, or (iii) in default in the performance or observance of any obligation, agreement, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which it is a party or by which it or any of its properties may be bound, which default would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(n) Other than as disclosed in the Pricing Prospectus and the Prospectus, there are no legal or governmental proceedings pending to which the Company or any of its Significant Subsidiaries is a party or of which any property of the Company or any of its Significant Subsidiaries is the subject which, if determined adversely to the Company or that Significant Subsidiary, would, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, and, to the Company's knowledge, no such proceedings are threatened by governmental authorities or others.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(o) The statements set forth in the Pricing Prospectus and the Prospectus under the captions "Description of Senior Notes" and "Description of Debt Securities," insofar as they purport to constitute a summary of the terms of the Securities and the Indenture, under the caption "Certain United States Federal Income Tax Consequences" and under the captions "Underwriting" and "Plan of Distribution" (except with respect to the information under the caption "Underwriting—Selling Restrictions"), insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate, complete and fair.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(p) The consolidated financial statements of the Company incorporated by reference in the Registration Statement, the Pricing Prospectus and the Prospectus fairly present the financial condition of the Company as of the dates indicated and the results of the Company's operations and cash flows for the periods therein specified and have been prepared in conformity with United States generally accepted accounting principles applied on a consistent basis throughout the periods involved, except as otherwise indicated therein; and the interactive data in eXtensible Business Reporting Language filed as exhibits to the periodic reports incorporated by reference in the Registration Statement, the Pricing Prospectus and the Prospectus fairly presents the information called for in all material respects and has been prepared in accordance with the SEC's rules and guidelines applicable thereto.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(q) PricewaterhouseCoopers LLP (the "**Accountants**"), who have audited certain financial statements of the Company and its subsidiaries, and have audited the Company's internal control over financial reporting, is an independent registered public accounting firm with respect to the Company as required by the 1933 Act and the rules and regulations of the SEC thereunder and the Public Company Accounting Oversight Board (United States).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(r) The Company is not, and, after giving effect to the offering and sale of the Securities and the application of the net proceeds thereof, will not be an "investment company," or an entity "controlled" by an investment company, as such terms are defined in the Investment Company Act of 1940, as amended.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(s) Except as disclosed in the Pricing Prospectus and the Prospectus, or except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, the Company and its Significant Subsidiaries (i) are in compliance with any and all applicable federal, state and local laws and regulations relating to the protection of human health and safety, the environment or hazardous or toxic substances or wastes, pollutants or contaminants ("**Environmental Laws**"), (ii) have received all permits, licenses or other approvals required of them under applicable Environmental Laws to conduct their business and (iii) are in compliance with all terms and conditions of any such permit, license or approval.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(t) The Company maintains a system of internal control over financial reporting (as such term is defined in Rule 13a-15(f) under the 1934 Act) that complies with the requirements of the 1934 Act and has been designed by the Company's principal executive officer and principal financial officer, or under their supervision, to provide reasonable assurance that (i) transactions are executed in accordance with management's general or specific authorizations; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with generally accepted accounting principles and to maintain asset accountability; (iii) access to assets is permitted only in accordance with management's general or specific authorization; and (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences; and, except as disclosed in the Pricing Prospectus and the Prospectus, the Company's internal control over financial reporting as of December 31, 2025 was effective and the Company is not aware of any material weaknesses in the Company's internal control over financial reporting since that date.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(u) Except as disclosed in the Pricing Prospectus and the Prospectus, since December 31, 2025, to the knowledge of the Chief Accounting Officer of the Company, there has been no change in the Company's internal control over financial reporting that has materially affected, or is reasonably likely to materially affect, the Company's internal control over financial reporting.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(v) The Company maintains disclosure controls and procedures (as such term is defined in Rule 13a-15(e) under the 1934 Act) that comply with the requirements of the 1934 Act; such disclosure controls and procedures have been designed to ensure that material information relating to the Company and its subsidiaries is made known to the Company's principal executive officer and principal financial officer by others within those entities; such disclosure controls and procedures as of December 31, 2025 were effective; and since December 31, 2025, to the knowledge of the Chief Accounting Officer of the Company, there has been no change in the Company's disclosure controls and procedures that has materially affected, or is reasonably likely to materially affect, the Company's disclosure controls and procedures.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(w) (A) (i) At the time of the initial filing of the Registration Statement, (ii) at the time of the most recent amendment thereto for the purposes of complying with Section 10(a)(3) of the 1933 Act (whether such amendment was by post-effective amendment, incorporated report filed pursuant to Section 13 or 15(d) of the 1934 Act or form of prospectus), and (iii) at the time the Company or any person acting on its behalf (within the meaning, for this clause only, of Rule 163(c) under the 1933 Act) made any offer relating to the Securities in reliance on the exemption of Rule 163 under the 1933 Act, the Company was a "well-known seasoned issuer" as defined in Rule 405 under the 1933 Act; and (B) at the earliest time after the filing of the Registration Statement that the Company or another offering participant made a bona fide offer (within the meaning of Rule 164(h)(2) under the 1933 Act) of the Securities, the Company was not an "ineligible issuer" as defined in Rule 405 under the 1933 Act.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(x) The Company and each of its Significant Subsidiaries have good and marketable title in fee simple to all real property and good and marketable title to all personal property owned by them, in each case free and clear of all liens, encumbrances and defects, except such as are described in the Pricing Disclosure Package (including, without limitation, the mortgages of each of the Significant Subsidiaries) or such as do not materially affect the value of such property and do not materially interfere with the use made and proposed to be made of such property by the Company and its Significant Subsidiaries or as could not reasonably be expected to have a Material Adverse Effect; and all assets held under lease by the Company and its Significant Subsidiaries are held by them under valid, subsisting and enforceable leases, with such exceptions as do not materially interfere with the use made and proposed to be made of such assets by the Company and its subsidiaries and as could not reasonably be expected to have a Material Adverse Effect.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(y) The Company maintains policies and procedures designed to ensure compliance by the Company, its subsidiaries and their respective directors, officers, employees and agents with all laws, rules and regulations of any jurisdiction applicable to the Company or its subsidiaries from time to time concerning or relating to bribery, corruption or money laundering (collectively, "**Anti-Corruption Laws**") and applicable economic or financial sanctions or trade embargoes imposed, administered or enforced from time to time by the U.S. government, including those administrated by the Office of Foreign Assets Control of the U.S. Department of the Treasury ("**OFAC**") or the U.S. Department of State (the "**State Department**"), or by the United Nations Security Council (the "**UNSC**"), the European Union (the "**EU**") or His Majesty's Treasury of the United Kingdom (collectively, "**Sanctions**"), and the Company and its subsidiaries and, to the knowledge of the Company, their respective officers, employees, directors and agents, are in compliance with Anti-Corruption Laws and applicable Sanctions; and none of (A) the Company, any of its subsidiaries, or, to the knowledge of the Company, any of their respective directors, officers or employees, or (B) to the knowledge of the Company, any agent of the Company or any of its subsidiaries that will act in any capacity in connection with, or benefit from, this Agreement, is (i) a person listed in any Sanctions-related list of designated persons maintained by OFAC or the State Department, or by the UNSC, the EU or any EU member state, (ii) a person operating, organized or resident in a country or territory that is itself the subject or target of any Sanctions (as of the date hereof, including, without limitation, Crimea, Cuba, Iran, North Korea, the so-called Donetsk People's Republic, the so-called Luhansk People's Republic, the non-government controlled areas of Zaporizhzhia and Kherson or any other Covered Region of Ukraine identified pursuant to Executive Order 14065) or (iii) any person 50% or more owned or controlled by any such person or persons.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(z) The Company will not, directly or indirectly, use the proceeds of the offering of the Securities, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity to fund any activities of or business with any person or entity that, at the time of such funding, is the subject of Sanctions.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(aa) Except as disclosed in the Pricing Prospectus and the Prospectus or except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, to the Company's knowledge there has been no security breach, unauthorized access or other compromise or misuse of or relating to any of the Company's information technology and computer systems, networks, hardware, software, data (including the data of their respective customers, employees, suppliers and vendors and any third party data maintained by or on behalf of them), equipment or technology (collectively, "**IT Systems and Data**"). Except as disclosed in the Pricing Prospectus and the Prospectus or except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, the Company has not been notified of, and has no knowledge of any event or condition that would reasonably be expected to result in, any security breach or other compromise to its IT Systems and Data. The Company has implemented backup and disaster recovery technology consistent with industry standards and practices. The Company has policies and procedures in place designed to ensure the integrity and security of its IT Systems and Data and comply with such policies and procedures in all material respects.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. <u>Purchase and Sale</u>. Subject to the terms and conditions herein set forth, the Company agrees to issue and sell to each of the Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from the Company, at a purchase price of 99.152% of the principal amount thereof, the principal amount of Securities set forth opposite the name of such Underwriter in Schedule I hereto.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. <u>Offering</u>. The several Underwriters propose to offer the Securities for sale upon the terms and conditions set forth in the Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. <u>Time and Place of Closing; Delivery of Securities</u>.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The Securities to be purchased by each Underwriter hereunder will be represented by one or more definitive global Securities in book-entry form which will be deposited by or on behalf of the Company with The Depository Trust Company ("**DTC**") or its designated custodian. The Company will deliver the Securities to the Underwriters against payment by or on behalf of such Underwriter of the purchase price therefor by wire transfer of Federal (same-day) funds to the account specified by the Company to the Underwriters at least twenty-four hours in advance, by causing DTC to credit the Securities to the account of J.P. Morgan Securities LLC at DTC. The Company will cause the certificates representing the Securities to be made available to the Underwriters for checking (if delivery of the Securities shall be made otherwise than through the facilities of DTC) at least twenty-four hours prior to the Time of Delivery at the Closing Location (as defined herein). The time and date of such delivery and payment shall be 10:00 a.m., New York City time, on March 4, 2026 or such other time and date as the Underwriters and the Company may agree upon in writing. Such time and date are herein called the "**Time of Delivery**".

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The documents to be delivered at the Time of Delivery by or on behalf of the parties hereto pursuant to Section 8 hereof, including the cross-receipt for the Securities and any additional documents requested by Pillsbury Winthrop Shaw Pittman LLP, New York, New York ("**Underwriters' Counsel**"), pursuant to Section 8(l) hereof, will be delivered at the office of Morgan, Lewis & Bockius LLP, counsel to the Company, 101 Park Avenue, New York, New York 10178 (the "**Closing Location**") at the Time of Delivery. For the purposes of this Section 4, "**New York Business Day**" shall mean each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in New York City are generally authorized or obligated by law or executive order to close.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;5. <u>Covenants of the Company</u>. The Company agrees with each of the Underwriters:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) To prepare the Prospectus in a form approved by the Underwriters and to file such Prospectus pursuant to Rule 424(b) under the 1933 Act not later than the SEC's close of business on the second business day following the execution and delivery of this Agreement or, if applicable, such earlier time as may be required by Rule 424(b) under the 1933 Act; to make no further amendment (except the final term sheet referred to below) or any supplement to the Registration Statement, the Pricing Prospectus, any Issuer Free Writing Prospectus or the Prospectus prior to the Time of Delivery which shall be disapproved by the Underwriters promptly after reasonable notice thereof; to advise the Underwriters, promptly after it receives notice thereof, of the time when any amendment to the Registration Statement has been filed or becomes effective or any amendment or supplement to the Prospectus has been filed with the SEC and to furnish the Underwriters with copies thereof; to prepare a final term sheet in substantially the form attached as Exhibit A to Schedule II hereto and to file such final term sheet pursuant to Rule 433(d) under the 1933 Act within the time required by such rule; to file promptly all other material required to be filed by the Company with the SEC pursuant to Rule 433(d) under the 1933 Act; to file promptly all reports and any definitive proxy or information statements required to be filed by the Company with the SEC pursuant to Section 13(a), 13(c), 14 or 15(d) of the 1934 Act subsequent to the date of the Prospectus and for so long as the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the 1933 Act) is required in connection with the offering or sale of the Securities; to promptly notify the Underwriters of any written notice given to the Company by either of Moody's Investors Service, Inc. or S&P Global Ratings, a division of S&P Global Inc. (each, a "**Rating Agency**"), of any intended decrease in any rating of any securities of the Company or of any intended change in any such rating that does not indicate the direction of the possible change of any such rating, in each case by any such Rating Agency; to advise the Underwriters, promptly after it receives notice thereof, of the issuance by the SEC of any stop order or of any order preventing or suspending the use of any Preliminary Prospectus or other prospectus in respect of the Securities, of the suspension of the qualification of the Securities for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose or pursuant to Section 8A of the 1933 Act against the Company or relating to the offering of the Securities, or of any request by the SEC for the amending or supplementing of the Registration Statement or the Prospectus or for additional information; and, in the event of the issuance of any such stop order or of any such order preventing or suspending the use of any Preliminary Prospectus or other prospectus relating to the Securities or suspending any such qualification, to promptly use its best efforts to obtain the withdrawal of such order.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) If at any time prior to the Time of Delivery (A) any event shall occur or condition shall exist as a result of which the Pricing Disclosure Package, as then amended or supplemented, would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading or (B) it is necessary to amend or supplement the Pricing Disclosure Package to comply with law, the Company will immediately notify the Underwriters thereof and forthwith prepare and file with the SEC (to the extent required) and furnish to the Underwriters and to such dealers as the Underwriters may designate, such amendments or supplements to the Pricing Disclosure Package as may be necessary so that the statements in the Pricing Disclosure Package, as so amended or supplemented, will not, in the light of the circumstances under which they were made, be misleading or so that the Pricing Disclosure Package will comply with law.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) For so long as the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the 1933 Act) is required in connection with the offering or sale of the Securities, to furnish such proper information as may be lawfully required and otherwise cooperate in qualifying the Securities for offer and sale under the securities or blue sky laws of such jurisdictions as the Underwriters may reasonably designate and to file and make in each year such statements or reports as are or may be reasonably required by the laws of such jurisdictions; provided, however, that the Company shall not be required to qualify as a foreign corporation, qualify as a dealer in securities or file a general consent to service of process under the laws of any jurisdiction.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) If immediately prior to the third anniversary (the "**Renewal Deadline**") of the initial effective date of the Registration Statement, any of the Securities remain unsold by the Underwriters, to file, prior to the Renewal Deadline, if it has not already done so and is eligible to do so, a new automatic shelf registration statement relating to the Securities, in a form satisfactory to the Underwriters. If the Company is no longer eligible to file an automatic shelf registration statement, the Company will, prior to the Renewal Deadline, if it has not already done so, file a new shelf registration statement relating to the Securities, in a form satisfactory to the Underwriters, and will use its best efforts to cause such registration statement to be declared effective within 60 days after the Renewal Deadline. The Company will take all other action necessary or appropriate to permit the public offering and sale of the Securities to continue as contemplated in the expired registration statement relating to the Securities. References herein to the Registration Statement shall include such new automatic shelf registration statement or such new shelf registration statement, as the case may be.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) If at any time when the Securities remain unsold by the Underwriters the Company receives from the SEC a notice pursuant to Rule 401(g)(2) under the 1933 Act or otherwise ceases to be eligible to use the automatic shelf registration statement form, to (i) promptly notify the Underwriters, (ii) promptly file a new registration statement or post-effective amendment on the proper form relating to the Securities, in a form satisfactory to the Underwriters, (iii) use its best efforts to cause such registration statement or post-effective amendment to be declared effective and (iv) promptly notify the Underwriters of such effectiveness. The Company will take all other action necessary or appropriate to permit the public offering and sale of the Securities to continue as contemplated in the registration statement that was the subject of the Rule 401(g)(2) notice or for which the Company has otherwise become ineligible. References herein to the Registration Statement shall include such new registration statement or post-effective amendment, as the case may be.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) To promptly furnish the Underwriters with electronic copies of the Prospectus and each Issuer Free Writing Prospectus prepared by the Company (to the extent not previously delivered), as amended or supplemented, and, if the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the 1933 Act) is required at any time in connection with the offering or sale of the Securities and if at such time any event shall have occurred as a result of which the Prospectus, the Pricing Disclosure Package or any Issuer Free Writing Prospectus, as then amended or supplemented, would include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the 1933 Act), such Pricing Disclosure Package or such Issuer Free Writing Prospectus, as then amended or supplemented, is delivered, not misleading, or, if for any other reason it shall be necessary during such same period to amend or supplement the Prospectus or to file under the 1934 Act any document incorporated by reference in the Prospectus in order to comply with the 1933 Act, the 1934 Act or the 1939 Act, to notify the Underwriters and, upon their request, to file such document and to prepare and furnish without charge to each Underwriter and to any dealer in securities as many electronic copies as the Underwriters may from time to time reasonably request of an amended Prospectus or a supplement to the Prospectus which will correct such statement or omission or effect such compliance, or, if at any time prior to the Time of Delivery (i) any event shall occur or condition shall exist as a result of which the Pricing Disclosure Package, as then amended or supplemented, would include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading or (ii) it is necessary to amend or supplement the Pricing Disclosure Package to comply with law, the Company will immediately notify the Underwriters thereof and forthwith prepare and, subject to Section 5(a) hereof, file with the SEC (to the extent required) and furnish to the Underwriters and to such dealers as the Underwriters may designate, such amendments or supplements to the Pricing Disclosure Package as may be necessary so that the statements in the Pricing Disclosure Package, as so amended or supplemented, will not include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading or so that the Pricing Disclosure Package will comply with law; and in case any Underwriter is required to deliver a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the 1933 Act) in connection with sales of the Securities at any time nine months or more after the time of issue of the Prospectus, upon such Underwriter's request and at the expense of such Underwriter, to prepare and deliver to such Underwriter as many electronic copies as such Underwriter may request of an amended or supplemented Prospectus complying with Section 10(a)(3) of the 1933 Act.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(g) To make generally available to its security holders and to holders of the Securities, as soon as practicable, but in any event not later than 18 months after the effective date of the Registration Statement (as defined in Rule 158(c) under the 1933 Act), an earning statement of the Company (which need not be audited) complying with Section 11(a) of the 1933 Act and the rules and regulations of the SEC thereunder (including, at the option of the Company, Rule 158 under the 1933 Act).

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(h) During the period beginning from the date hereof and continuing to and including the Time of Delivery of the Securities, not to offer, sell, contract to sell, pledge, grant any option to purchase, make any short sale or otherwise dispose, except as provided hereunder, of any debt securities of the Company which mature more than one year after such Time of Delivery and which are substantially similar to the Securities, without the prior written consent of the Underwriters.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) Upon request of an Underwriter, to furnish, or cause to be furnished, to such Underwriter an electronic version of the Company's trademarks, service marks and corporate logo for use on the website, if any, operated by such Underwriter for the purpose of facilitating the on-line offering of the Securities (the "**License**"); provided, however, that the License shall be used solely for the purpose described in this Section 5(i), is granted without any fee and may not be assigned or transferred.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(j) To apply the net proceeds from the sale of the Securities for the purposes set forth in the Registration Statement, the Pricing Disclosure Package and the Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;6. <u>Issuer Free Writing Prospectuses</u>.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) (i) The Company represents and agrees that, other than the final term sheet prepared and filed pursuant to Section 5(a) hereof, without the prior consent of the Underwriters, it has not made and will not make any offer relating to the Securities that would constitute a "free writing prospectus" as defined in Rule 405 under the 1933 Act;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(ii) each Underwriter represents and agrees that, without the prior consent of the Company and the other Underwriters, other than one or more term sheets relating to the Securities containing customary information (which, in their final form, will be consistent with the final term sheet prepared and filed pursuant to Section 5(a) hereof and will not otherwise require filing under Rule 433(d) under the 1933 Act), it has not made and will not make any offer relating to the Securities that would constitute a free writing prospectus; provided, however, that notwithstanding the above, each Underwriter may convey to investors, without the prior consent of the Company or the other Underwriters, any Bloomberg L.P. or other electronic communication regarding comparable bond prices; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(iii) any such free writing prospectus the use of which has been consented to by the Underwriters (including the final term sheet prepared and filed pursuant to Section 5(a) hereof) is listed on Schedule II(a) or (b) hereto.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The Company has complied and will comply with the requirements of Rule 433 under the 1933 Act applicable to any Issuer Free Writing Prospectus, including timely filing with the SEC or retention where required and legending.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;7. <u>Payment of Expenses</u>. Whether or not any sale of the Securities is consummated, the Company covenants and agrees with the several Underwriters that the Company will pay or cause to be paid the following: (i) the fees, disbursements and expenses of the Company's counsel and the Accountants in connection with the registration of the Securities under the 1933 Act and all other expenses in connection with the preparation, printing, reproduction and filing of the Registration Statement, any Preliminary Prospectus, any Issuer Free Writing Prospectus, the Pricing Disclosure Package and the Prospectus and amendments and supplements thereto and the mailing and delivering of copies thereof to the Underwriters and any dealers; (ii) the applicable SEC filing fees relating to the Securities within the time required by Rule 456(b)(1) under the 1933 Act without regard to the proviso thereof; (iii) the cost of printing or producing any agreement among underwriters, this Agreement, the Indenture, any blue sky surveys, closing documents (including any compilations thereof) and any other documents in connection with the offering, purchase, sale and delivery of the Securities; (iv) all expenses (not to exceed $5,000) in connection with the qualification of the Securities for offering and sale under state securities laws as provided in Section 5(c) hereof, including the fees and disbursements of Underwriters' Counsel in connection with such qualification and in connection with any such blue sky surveys; (v) any fees charged by securities rating services for rating the Securities; (vi) any filing fees incident to, and the fees and disbursements of Underwriters' Counsel in connection with, any required review by the Financial Industry Regulatory Authority of the terms of the sale of the Securities; (vii) the cost of preparing certificates for the Securities; (viii) the fees and expenses of the Trustee and any agent of the Trustee and the fees and disbursements of counsel for the Trustee in connection with the Indenture and the Securities; and (ix) all other costs and expenses incurred by the Company incident to the performance of the Company's obligations hereunder that are not otherwise specifically provided for in this Section 7. It is understood, however, that, except as provided in this Section 7 and Sections 9 and 13 hereof, the Underwriters will pay all of their own costs and expenses, including the fees of Underwriters' Counsel and any advertising expenses in connection with any offers the Underwriters may make.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8. <u>Conditions to Underwriters' Obligations</u>. The obligations of the several Underwriters hereunder shall be subject, in the discretion of the Underwriters, to the condition that all representations and warranties and other statements of the Company contained herein are, at and as of the Applicable Time and the Time of Delivery, true and correct, the condition that the Company shall have performed all of its obligations hereunder theretofore to be performed at and as of the Time of Delivery, as the case may be, and the following additional conditions:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The Prospectus shall have been filed with the SEC pursuant to Rule 424(b) under the 1933 Act within the applicable time period prescribed for such filing by the rules and regulations under the 1933 Act and in accordance with Section 5(a) hereof; the final term sheet contemplated by Section 5(a) hereof, and any other material required to be filed by the Company pursuant to Rule 433(d) under the 1933 Act related to the offering of the Securities, shall have been filed with the SEC within the applicable time period prescribed for such filings by Rule 433; no stop order suspending the effectiveness of the Registration Statement or any part thereof shall have been issued and no proceeding for that purpose or pursuant to Section 8A of the 1933 Act against the Company or related to the offering of the Securities shall have been initiated or threatened by the SEC and no notice of objection of the SEC to the use of the Registration Statement or any post-effective amendment thereto pursuant to Rule 401(g)(2) under the 1933 Act shall have been received; no stop order suspending or preventing the use of the Prospectus or any Issuer Free Writing Prospectus shall have been initiated or threatened by the SEC; and all requests for additional information on the part of the SEC shall have been complied with to the reasonable satisfaction of the Underwriters.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) At the Time of Delivery, Underwriters' Counsel shall have furnished to the Underwriters an opinion, dated such date, with respect to such matters as the Underwriters may reasonably request, and Underwriters' Counsel shall have received such documents and information as it may reasonably request to enable it to pass upon such matters. In rendering such opinion, Underwriters' Counsel may (i) state that such opinion is limited to matters covered by the federal laws of the United States of America and the laws of the State of New York and (ii) rely as to matters of fact, to the extent deemed proper, on certificates of responsible officers of the Company and public officials.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) At the Time of Delivery, Stephen C. Lee, Esq., Vice President and Deputy General Counsel of the Company, shall have furnished to the Underwriters an opinion, dated such date, in the form attached as Exhibit A hereto (x) with such changes therein as may be agreed upon by the Company and the Underwriters with the approval of Underwriters' Counsel, and (y) if the Pricing Disclosure Package shall be supplemented after being furnished to the Underwriters for use in offering the Securities, with changes therein to reflect such supplementation.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) At the Time of Delivery, Morgan, Lewis & Bockius LLP, counsel to the Company, shall have furnished to the Underwriters an opinion, dated such date, in the form attached as Exhibit B hereto, (x) with such changes therein as may be agreed upon by the Company and the Underwriters with the approval of Underwriters' Counsel and (y) if the Pricing Disclosure Package shall be supplemented after being furnished to the Underwriters for use in offering the Securities, with changes therein to reflect such supplementation.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) On the date of this Agreement and at the Time of Delivery, the Accountants shall have furnished to the Underwriters letters, dated as of such dates, respectively, in form and substance satisfactory to the Underwriters, with respect to the consolidated financial statements of the Company and its subsidiaries incorporated by reference in the Registration Statement, the Pricing Prospectus and the Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(f) (i) Neither the Company nor any of its subsidiaries shall have sustained, since the date of the most recent audited consolidated financial statements incorporated by reference in the Pricing Prospectus, any loss or interference with their business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, other than as disclosed or contemplated in the Pricing Prospectus, and (ii) since the respective dates as of which information is given in the Pricing Prospectus, there shall not have been any change, or any development involving a prospective change, in or affecting the general affairs, management, financial position, shareholders' equity or consolidated results of operations of the Company and its subsidiaries, taken as a whole, other than as disclosed or contemplated in the Pricing Prospectus, the effect of which, in any such case described in clause (i) or (ii), is in the judgment of the Underwriters so material and adverse as to make it impracticable or inadvisable to proceed with the public offering, sale or delivery of the Securities on the terms and in the manner contemplated in the Pricing Disclosure Package and the Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(g) On or after the Applicable Time, (i) no downgrading shall have occurred in the rating accorded the Company's debt securities by any Rating Agency, and (ii) no such Rating Agency shall have publicly announced that it has under surveillance or review, with possible negative implications, its rating of any of the Company's debt securities, unless such surveillance or review has been publicly announced prior to the Applicable Time.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(h) On or after the Applicable Time, there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally by the SEC, the New York Stock Exchange or The NASDAQ Stock Market or any setting of minimum or maximum prices for trading thereon; (ii) a suspension or material limitation in trading in the Company's securities by the SEC, the New York Stock Exchange or The NASDAQ Stock Market; (iii) a general moratorium on commercial banking activities declared by Federal, New York state or Missouri state authorities or a material disruption has occurred in commercial banking or securities settlement or clearance services in the United States; (iv) any outbreak or escalation of hostilities involving the United States or the declaration by the United States of a national emergency or war; or (v) the occurrence of any other calamity or crisis or any change in financial, political or economic conditions in the United States or elsewhere, if the effect of any event specified in clause (iv) or (v), in the judgment of the Underwriters, makes it impracticable or inadvisable to proceed with the public offering, sale or delivery of the Securities on the terms and in the manner contemplated in the Pricing Disclosure Package and the Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(i) On or prior to the Time of Delivery, the Underwriters shall have received satisfactory evidence that the Securities have received at least the ratings set forth in the Pricing Disclosure Package and that such ratings are in effect at the Time of Delivery.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(j) The Company shall have complied with the provisions of Section 5(f) hereof with respect to the furnishing of the Prospectus and each Issuer Free Writing Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(k) At the Time of Delivery, the Company shall have furnished or caused to be furnished to the Underwriters a certificate or certificates, dated such date, of officers of the Company (one of which shall be the chief accounting or financial officer) satisfactory to the Underwriters in which such officers shall state that: the representations and warranties of the Company in this Agreement and that are qualified by materiality are true and correct in all respects and the representations and warranties of the Company in this Agreement not qualified by materiality are true and correct in all material respects, in each case, at and as of the Time of Delivery, that the Company has complied with all agreements and has satisfied all conditions on its part to be performed or satisfied hereunder at or prior to the Time of Delivery and that, subsequent to the respective dates as of which information is given in the Pricing Prospectus, there has been no material adverse change, or any development involving a prospective material adverse change, in or affecting the general affairs, management, financial position, shareholders' equity or consolidated results of operations of the Company and its subsidiaries, taken as a whole, otherwise than as described in the Pricing Prospectus.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(l) At the Time of Delivery, Underwriters' Counsel shall have been furnished with all such documents, certificates and opinions as Underwriters' Counsel may reasonably request and that are customary for transactions of a similar nature, in order to evidence the accuracy and completeness of any of the representations, warranties, certificates or other written statements of the Company provided to the Underwriters pursuant to this Agreement, the performance of any of the covenants of the Company, or the fulfillment of any of the conditions herein contained. All proceedings taken by the Company at or prior to the Time of Delivery in connection with the authorization, issuance and sale of the Securities as contemplated by this Agreement, including, without limitation, the execution of this Agreement, shall be reasonably satisfactory in form and substance to the Underwriters and Underwriters' Counsel.

In case any of the conditions specified above in this Section 8 shall not have been fulfilled, this Agreement may be terminated by the Underwriters upon mailing or otherwise delivering written notice thereof to the Company. Any such termination shall be without liability of either party to the other party except as otherwise provided in Section 7 hereof and except for any liability under Section 9 hereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9. <u>Indemnification and Contribution</u>.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The Company will indemnify and hold harmless each Underwriter against any losses, claims, damages, liabilities or expenses, as and when incurred, to which such Underwriter may become subject, joint or several, under the 1933 Act or otherwise, insofar as such losses, claims, damages, liabilities or expenses (or actions in respect thereof), arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus or any "issuer information" filed or required to be filed pursuant to Rule 433(d) under the 1933 Act, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will promptly reimburse such Underwriter for any reasonable expenses (including reasonable fees and expenses for no more than one law firm for the Underwriters) when and as incurred by such Underwriter in connection with investigating or defending any such action or claim; provided, however*,* that the Company shall not be liable in any such case to an Underwriter to the extent that any such loss, claim, damage, liability or expense arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto or any Issuer Free Writing Prospectus, in reliance upon and in conformity with written information furnished to the Company by any Underwriter expressly for use therein.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) Each Underwriter, severally and not jointly, will indemnify and hold harmless the Company against any losses, claims, damages, liabilities or expenses to which the Company may become subject, under the 1933 Act or otherwise, insofar as such losses, claims, damages, liabilities or expenses (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto or any Issuer Free Writing Prospectus, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto or any Issuer Free Writing Prospectus, in reliance upon and in conformity with written information furnished to the Company by any Underwriter expressly for use therein, and will reimburse the Company for any reasonable expenses (including reasonable fees and expenses for no more than one law firm for the Company) when and as incurred by the Company in connection with investigating or defending any such action or claim.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Promptly after receipt by an indemnified party under Section 9(a) or Section 9(b) hereof of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under Section 9(a) or Section 9(b) hereof, notify such indemnifying party in writing of the commencement thereof, but the omission so to notify such indemnifying party shall not relieve such indemnifying party from any liability except to the extent that it has been prejudiced in any material respect by such failure or from any liability that it may have to any such indemnified party otherwise than under Section 9(a) or Section 9(b) hereof. In case any such action shall be brought against any such indemnified party and it shall notify such indemnifying party of the commencement thereof, such indemnifying party shall be entitled to participate therein and, to the extent that it shall wish, jointly with any other indemnifying party under Section 9(a) or Section 9(b) hereof similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party (who shall not, except with the consent of such indemnified party, be counsel to such indemnifying party), and, after notice from such indemnifying party to such indemnified party of its election so to assume the defense thereof, such indemnifying party shall not be liable to such indemnified party under Section 9(a) or Section 9(b) hereof for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection with the defense thereof other than reasonable costs of investigation. Notwithstanding the indemnifying party's election to appoint counsel to represent the indemnified party in any such action, the indemnified party shall have the right to employ separate counsel (including local counsel), and the indemnifying party shall bear the reasonable fees, costs and expenses of such separate counsel if (i) the use of counsel chosen by the indemnifying party to represent the indemnified party would present such counsel with a conflict of interest; (ii) the actual or potential defendants in, or targets of, any such action include both the indemnified party and the indemnifying party and the indemnified party shall have reasonably concluded that there may be legal defenses available to it or other indemnified parties that are different from or additional to those available to the indemnifying party; (iii) the indemnifying party shall not have employed counsel satisfactory to the indemnified party to represent the indemnified party within a reasonable time after notice of the institution of any such action; or (iv) the indemnifying party shall authorize the indemnified party to employ separate counsel at the expense of the indemnifying party. No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement, compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) If the indemnification provided for in this Section 9 is unavailable to or insufficient to hold harmless an indemnified party under Section 9(a) or Section 9(b) hereof in respect of any losses, claims, damages, liabilities or expenses (or actions in respect thereof) referred to therein, then each indemnifying party under Section 9(a) or Section 9(b) hereof shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages, liabilities or expenses (or actions in respect thereof) in such proportion as is appropriate to reflect the relative benefits received by the Company on the one hand and the Underwriters on the other hand from the offering of the Securities. If, however, the allocation provided by the immediately preceding sentence is not permitted by applicable law or if the indemnified party failed to give the notice required under Section 9(c) hereof, then each such indemnifying party shall contribute to such amount paid or payable by such indemnified party in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company on the one hand and the Underwriters on the other hand in connection with the statements or omissions that resulted in such losses, claims, damages, liabilities or expenses (or actions in respect thereof), as well as any other relevant equitable considerations. The relative benefits received by the Company on the one hand and the Underwriters on the other hand shall be deemed to be in the same proportion as the total net proceeds from such offering (before deducting expenses) received by the Company bear to the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in the table on the cover page of the Prospectus. The relative fault of the Company on the one hand and the Underwriters on the other hand shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company or the Underwriters and the parties' relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company and the Underwriters agree that it would not be just and equitable if contribution pursuant to this Section 9(d) were determined by *pro rata* allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation that does not take account of the equitable considerations referred to above in this Section 9(d). The amount paid or payable by such an indemnified party as a result of the losses, claims, damages, liabilities or expenses (or actions in respect thereof) referred to above in this Section 9(d) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this Section 9(d), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Securities underwritten by such Underwriter and distributed to the public were offered to the public exceeds the amount of any damages that such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the 1933 Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters' obligations in this Section 9(d) to contribute are several in proportion to their respective underwriting obligations and not joint.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) The obligations of the Company under this Section 9 shall be in addition to any liability that the Company may otherwise have and shall extend, upon the same terms and conditions, to each officer, director, employee, agent or other representative and to each person, if any, who controls each Underwriter within the meaning of the 1933 Act or the 1934 Act and each broker-dealer affiliate of any Underwriter; and the obligations of the Underwriters under this Section 9 shall be in addition to any liability that the respective Underwriters may otherwise have and shall extend, upon the same terms and conditions, to each officer, director, employee, agent or other representative and to each person, if any, who controls the Company within the meaning of the 1933 Act or the 1934 Act.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10. <u>Survival</u>. The respective indemnities, agreements, representations, warranties and other statements of the Company and the several Underwriters, as set forth in this Agreement or made by or on behalf of the Company or the Underwriters, respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation (or any statement as to the results thereof) made by or on behalf of any Underwriter, any of its officers, directors, employees, agents or other representatives or controlling persons, or the Company, any officer or director of the Company who signed the Registration Statement or any controlling person of the Company, and shall survive delivery of and payment for the Securities.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;11. <u>Notices</u>. All notices and other communications hereunder shall be in writing and shall be deemed to have been duly given if mailed or transmitted by any standard form of telecommunication. Notices to the Underwriters shall be directed to BNY Mellon Capital Markets, LLC, 240 Greenwich Street, 3W, New York, New York 10286, Attention: Debt Capital Markets, facsimile: (212) 815-6403; J.P. Morgan Securities LLC, 270 Park Avenue, New York, New York 10017, Attention: Investment Grade Syndicate Desk, facsimile: (212) 834-6081; RBC Capital Markets, LLC, Brookfield Place, 200 Vesey Street, 8th Floor, New York, New York 10281, Attention: DCM Transaction Management/Scott Primrose, telephone: (212) 618-7706, e-mail: TMGUS@rbccm.com; U.S. Bancorp Investments, Inc., 214 North Tryon Street, 26th Floor, Charlotte, North Carolina 28202, Attention: High Grade Syndicate, facsimile: (877) 774-3462; and Wells Fargo Securities, LLC, 550 South Tryon Street, 5th Floor, Charlotte, North Carolina 28202, Attention: Transaction Management, email: tmgcapitalmarkets@wellsfargo.com, facsimile: (704) 410-0326; and notices to the Company shall be directed to Ameren Corporation, 1901 Chouteau Avenue, St. Louis, Missouri 63103, Attention: Treasurer, email: mlansford@ameren.com.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;12. <u>Defaulting Underwriters</u>.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) If any Underwriter shall default in its obligation to purchase the Securities which it has agreed to purchase hereunder, the other Underwriters may in their discretion arrange for themselves or another party or other parties to purchase such Securities on the terms contained herein. If within 36 hours after such default by any Underwriter the other Underwriters do not arrange for the purchase of such Securities, then the Company shall be entitled to a further period of 36 hours within which to procure another party or other parties satisfactory to such Underwriters to purchase such Securities on such terms. In the event that, within the respective prescribed periods, such Underwriters notify the Company that they have so arranged for the purchase of such Securities, or the Company notifies such Underwriters that it has so arranged for the purchase of such Securities, such Underwriters or the Company shall have the right to postpone the Time of Delivery for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary in the Registration Statement, the Pricing Disclosure Package or the Prospectus, or in any other documents or arrangements, and the Company agrees to file promptly any amendments or supplements to the Registration Statement, the Pricing Disclosure Package or the Prospectus which in the opinion of the Underwriters may thereby be made necessary. The term "Underwriter" as used in this Agreement shall include any person substituted under this Section 12 with like effect as if such person had originally been a party to this Agreement with respect to such Securities.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Underwriter or Underwriters by the other Underwriters and the Company as provided in Section 12(a) hereof, the aggregate principal amount of such Securities which remains unpurchased does not exceed one-eleventh of the aggregate principal amount of the Securities, then the Company shall have the right to require each non-defaulting Underwriter to purchase the principal amount of Securities which such Underwriter agreed to purchase hereunder and, in addition, to require each non-defaulting Underwriter to purchase its pro rata share (based on the principal amount of Securities which such Underwriter agreed to purchase hereunder) of the Securities of such defaulting Underwriter or Underwriters for which such arrangements have not been made; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) If, after giving effect to any arrangements for the purchase of the Securities of a defaulting Underwriter or Underwriters by the other Underwriters and the Company as provided in Section 12(a) hereof, the aggregate principal amount of such Securities which remains unpurchased exceeds one-eleventh of the aggregate principal amount of the Securities, or if the Company shall not exercise the right described in Section 12(b) hereof to require non-defaulting Underwriters to purchase Securities of a defaulting Underwriter or Underwriters, then this Agreement shall thereupon terminate, without liability on the part of any non-defaulting Underwriter or the Company, except for the expenses to be borne by the Company and the Underwriters as provided in Section 7 hereof and the indemnity and contribution agreements in Section 9 hereof; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;13. <u>Termination</u>. If this Agreement shall be terminated pursuant to Section 12 hereof, the Company shall not then be under any liability to any Underwriter except as provided in Sections 7 and 9 hereof; but, if for any other reason, including if any of the conditions in Section 8 hereof have not been fulfilled, the Securities are not delivered by or on behalf of the Company as provided herein or the Company does not comply with its other obligations as provided herein, the Company will reimburse the Underwriters for all out-of-pocket expenses approved in writing by the Underwriters, including fees and disbursements of Underwriters' Counsel, reasonably incurred by the Underwriters in making preparations for the purchase, sale and delivery of the Securities, but the Company shall then be under no further liability to any Underwriter with respect to the Securities, except as provided in Sections 7 and 9 hereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;14. <u>No Fiduciary Duty</u>. The Company hereby acknowledges that the Underwriters are acting solely in the capacity of an arm's-length contractual counterparty to the Company with respect to the offering of Securities contemplated hereby (including in connection with determining the terms of the offering) and not as a financial advisor or a fiduciary to, or an agent of, the Company or any other person. Additionally, the Underwriters are not advising the Company or any other person as to any legal, tax, investment, accounting or regulatory matters in any jurisdiction with respect to the offering of Securities contemplated hereby. The Company shall consult with its own advisors concerning such matters and shall be responsible for making its own independent investigation and appraisal of the transactions contemplated hereby, and the Underwriters shall have no responsibility or liability to the Company with respect thereto. Any review by the Underwriters of the Company, the transactions contemplated hereby or other matters relating to such transactions will be performed solely for the benefit of the Underwriters and shall not be on behalf of the Company.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;15. <u>Governing Law; Miscellaneous</u>.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) The rights and duties of the parties to this Agreement shall, pursuant to New York General Obligations Law Section 5-1401, be governed by the law of the State of New York. This Agreement shall be binding upon, and inure solely to the benefit of, the Company and the Underwriters except to the extent provided in Section 9(e) hereof, and their respective heirs, executors, administrators, successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No person who purchases any of the Securities from the Underwriters shall be deemed a successor or assign by reason merely of such purchase.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) The words "execution," "signed," "signature," "delivery" and words of like import in or relating to this Agreement or any document to be signed in connection with this Agreement shall be deemed to include electronic signatures complying with the U.S. federal ESIGN Act of 2000 or the New York Electronic Signature and Records Act or deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) Time shall be of the essence of this Agreement. As used herein, the term "business day" shall mean any day when the SEC's office in Washington, D.C. is open for business. The word "or" shall not be exclusive, and all references in this Agreement to the words "herein," "hereof," "hereunder" and other words of similar import refer to this Agreement as a whole and not to any particular Section or subdivision hereof, and the captions to such Sections and subdivisions are for convenience only and shall not affect the construction hereof.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(d) The Company is authorized, subject to applicable law, to disclose any and all aspects of this potential transaction that are necessary to support any U.S. federal or state income tax benefits expected to be claimed with respect to such transaction, without the Underwriters imposing any limitation of any kind.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(e) This Agreement may be executed by any one or more of the parties hereto and thereto in any number of counterparts, each of which shall be deemed to be an original, but all such respective counterparts shall together constitute one and the same instrument.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**16.** **<u>Waiver of Jury Trial</u>. The Company and each of the Underwriters hereby waive their respective rights to jury trial with respect to any litigation arising under, or in connection with, this Agreement.**

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;17. <u>Qualified Financial Contracts</u>. In the event that any Underwriter that is a Covered Entity (as defined below) becomes subject to a proceeding under a U.S. Special Resolution Regime (as defined below), the transfer from such Underwriter of this Agreement, and any interest and obligation in or under this Agreement, will be effective to the same extent as the transfer would be effective under the U.S. Special Resolution Regime if this Agreement, and any such interest and obligation, were governed by the laws of the United States or a state of the United States. In the event that any Underwriter that is a Covered Entity or a BHC Act Affiliate (as defined below) of such Underwriter becomes subject to a proceeding under a U.S. Special Resolution Regime, Default Rights (as defined below) under this Agreement that may be exercised against such Underwriter are permitted to be exercised to no greater extent than such Default Rights could be exercised under the U.S. Special Resolution Regime if this Agreement were governed by the laws of the United States or a state of the United States. "**BHC Act Affiliate**" has the meaning assigned to the term "affiliate" in, and shall be interpreted in accordance with, 12 U.S.C. § 1841(k). "**Covered Entity**" means any of the following: (i) a "covered entity" as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 252.82(b); (ii) a "covered bank" as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 47.3(b); or (iii) a "covered FSI" as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 382.2(b). "**Default Right**" has the meaning assigned to that term in, and shall be interpreted in accordance with, 12 C.F.R. §§ 252.81, 47.2 or 382.1, as applicable. "**U.S. Special Resolution Regime**" means each of (x) the Federal Deposit Insurance Act and the regulations promulgated thereunder and (y) Title II of the Dodd-Frank Wall Street Reform and Consumer Protection Act and the regulations promulgated thereunder.

*{Signature Page Follows}*

If the foregoing is in accordance with your understanding, please sign and return to the Company the enclosed duplicate hereof, whereupon this Agreement will become a binding agreement between the Company and the Underwriters in accordance with its terms.

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| | |
|:---|:---|
| Very truly yours, | Very truly yours, |
| **Ameren Corporation** | **Ameren Corporation** |
| By: | /s/ Mitchell J. Lansford |
|  | Name: Mitchell J. Lansford |
|  | Title: Vice President and Treasurer |

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Accepted as of the date hereof:

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| | | | |
|:---|:---|:---|:---|
| **BNY Mellon Capital Markets, LLC** | **BNY Mellon Capital Markets, LLC** | **J.P. Morgan Securities LLC** | **J.P. Morgan Securities LLC** |
| By: | /s/ Dan Klinger | By: | /s/ Robert Bottamedi |
|  | Name: Dan Klinger |  | Name: Robert Bottamedi |
|  | Title: Managing Director |  | Title: Executive Director |
| **RBC Capital Markets, LLC** | **RBC Capital Markets, LLC** | **U.S. Bancorp Investments, Inc.** | **U.S. Bancorp Investments, Inc.** |
| By: | /s/ Scott J. Tuchfeld | By: | /s/ Michael Priore |
|  | Name: Scott J. Tuchfeld |  | Name: Michael Priore |
|  | Title: Managing Director |  | Title: Managing Director |
| **Wells Fargo Securities, LLC** | **Wells Fargo Securities, LLC** |  |  |
| By: | /s/ Carolyn Hurley |  |  |
|  | Name: Carolyn Hurley |  |  |
|  | Title: Managing Director |  |  |

---

{*Signature Page to Underwriting Agreement*}

<u>SCHEDULE I</u>

---

| | |
|:---|:---|
| **Underwriter** | **Principal Amount of <br> the Securities to be <br> Purchased** |
| BNY Mellon Capital Markets, LLC | $80000000 |
| J.P. Morgan Securities LLC | 80000000 |
| RBC Capital Markets, LLC | 80000000 |
| U.S. Bancorp Investments, Inc. | 80000000 |
| Wells Fargo Securities, LLC | 80000000 |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total** | $**400000000** |

---

<u>SCHEDULE II</u>

(a) Issuer Free Writing Prospectuses to be included
 in the Pricing Disclosure Package: Pricing Term Sheet attached as Exhibit A hereto.

(b) Issuer Free Writing Prospectuses not included
 in the Pricing Disclosure Package: None.

Exhibit A to Schedule II

**Ameren Corporation**

<u>Pricing Term Sheet</u>

February 26, 2026

---

| | |
|:---|:---|
| Issue: | 5.00% Senior Notes due 2036 (the "Notes") |
| Principal Amount: | $400000000 |
| Coupon (Interest Rate): | 5.00% per annum |
| Maturity Date: | May 15, 2036 |
| Benchmark Treasury: | 4.125% due February 15, 2036 |
| Benchmark Treasury Price: | 100-26+ |
| Benchmark Treasury Yield: | 4.023% |
| Spread to Benchmark Treasury: | +100 basis points |
| Re-offer Yield: | 5.023% |
| Offering Price (Issue Price): | 99.802% of the principal amount |
| Interest Payment Dates: | May 15 and November 15, commencing November 15, 2026 |
| Optional Redemption: | Prior to February 15, 2036 (the "Par Call Date") redeemable, in whole or in part, at any time at a redemption price equal to the greater of (1)(a) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the redemption date (assuming the Notes to be redeemed matured on the Par Call Date) on a semi-annual basis at the Treasury Rate plus 15 basis points, less (b) interest accrued to the redemption date, and (2) 100% of the principal amount of the Notes to be redeemed, plus, in either case, accrued and unpaid interest thereon to the redemption date. On or after the Par Call Date, redeemable, in whole or in part, at any time at a redemption price equal to 100% of the principal amount of the Notes being redeemed, plus accrued and unpaid interest thereon to the redemption date. |

---

---

| | |
|:---|:---|
| Right to Redeem for Tax Credit Event: | Redeemable upon the occurrence of a Tax Credit Event, in whole but not in part, at 101% of the principal amount of the Notes to be redeemed, plus accrued and unpaid interest thereon to the redemption date (provided, that the related notice of redemption must be sent no later than December 31, 2026). |
| Expected Ratings (Moody's/S&P)\*: | {Intentionally omitted}  |
| Trade Date: | February 26, 2026 |
| Settlement Date: | March 4, 2026 (T+4)\*\* |
| CUSIP / ISIN: | 023608 AS1 / US023608AS14 |
| Joint Book-Running Managers:<br>| BNY Mellon Capital Markets, LLC<br> J.P. Morgan Securities LLC<br> RBC Capital Markets, LLC<br> U.S. Bancorp Investments, Inc.<br> Wells Fargo Securities, LLC  |

---

The terms "Treasury Rate" and "Tax Credit Event" have the respective meanings ascribed to those terms in the Issuer's Preliminary Prospectus Supplement, dated February 26, 2026.

\*A security rating is not a recommendation to buy, sell or hold securities and should be evaluated independently of any other rating. The rating is subject to revision or withdrawal at any time by the assigning rating organization.

\*\*It is expected that delivery of the Notes will be made against payment therefor on or about the Settlement Date specified above, which will be the fourth business day following the date hereof. Under Rule 15c6-1 under the Securities Exchange Act of 1934, as amended, trades in the secondary market generally are required to settle in one business day, unless the parties to a trade expressly agree otherwise. Accordingly, purchasers who wish to trade the Notes more than one business day prior to the scheduled settlement date will be required, by virtue of the fact that the Notes initially are expected to settle in T+4, to specify an alternative settlement arrangement at the time of any such trade to prevent a failed settlement.

**The Issuer has filed a registration statement (including a prospectus) with the SEC for the offering to which this communication relates. Before you invest, you should read the prospectus in that registration statement and other documents the Issuer has filed with the SEC for more complete information about the Issuer and this offering. You may get these documents for free by visiting EDGAR on the SEC's website at www.sec.gov. Alternatively, the Issuer, any underwriter or any dealer participating in the offering will arrange to send you the prospectus if you request it by calling BNY Mellon Capital Markets, LLC toll-free at 1-800-269-6864, J.P. Morgan Securities LLC collect at 1-212-834-4533, RBC Capital Markets, LLC toll-free at 1-866-375-6829, U.S. Bancorp Investments, Inc. toll-free at 1-877-558-2607 or Wells Fargo Securities, LLC toll-free at 1-800-645-3751.**

<u>SCHEDULE III</u>

<u>Significant Subsidiaries</u>

Union Electric Company

Ameren Illinois Company

## Exhibit 4.3

**Exhibit 4.3**

**AMEREN CORPORATION**

**Company Order**

March 4, 2026

The Bank of New York Mellon Trust Company, N.A.,

as Trustee

311 S. Wacker Drive

Suite 6200B, Mailbox #44

Chicago, Illinois 60606

Re: <u>5.00% Senior Notes due 2036</u>

Ladies and Gentlemen:

Application is hereby made to The Bank of New York Mellon Trust Company, N.A., a national banking association, as successor trustee (the "<u>Trustee</u>"), under the Indenture, dated as of December 1, 2001, as amended and supplemented (the "<u>Indenture</u>"), between Ameren Corporation, a Missouri corporation (the "<u>Company</u>"), and the Trustee for the authentication and delivery of $400,000,000 aggregate principal amount of the Company's 5.00% Senior Notes due 2036 (the "<u>Notes</u>"), pursuant to the provisions of Article II of the Indenture. The Company, at any time and from time to time, without the consent of the holders of the Notes, may deliver additional Notes of the same series executed by the Company to the Trustee for authentication, having the same terms and conditions (including the same CUSIP number) as the Notes authenticated pursuant hereto in all respects, except for the date of original issuance, the offering price, and, if applicable, the initial interest accrual date and the initial interest payment date. Such additional Notes shall be part of the same series as the Notes authenticated pursuant hereto. All capitalized terms not defined herein that are defined in the Indenture shall have the same meaning as used in the Indenture.

The Notes will be issued in the form of a Global Note registered in the name of Cede & Co. (as nominee for The Depository Trust Company ("<u>DTC</u>"), New York, New York, which will act as the Depositary for the Global Note). Pursuant to Section 2.05(c) of the Indenture, the Notes will have the terms set forth in the form of Global Note attached hereto as <u>Exhibit A</u> (which terms are incorporated by reference in this Company Order). The Global Note shall bear the depositary legend in substantially the form set forth in <u>Exhibit A</u> attached hereto. The Notes will be issued only in denominations of $2,000 and in integral multiples of $1,000 in excess thereof.

The Company has reserved the right, without any consent, vote or other action by Holders of any series of Notes (as defined in the Indenture) issued after November 1, 2023, including the Notes, or of any subsequent series of Notes (as defined in the Indenture), to amend the Indenture as follows:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. amend
 Section 3.02(b) of the Indenture to replace the words "no less than 30 or more than
 60 days prior to the date fixed for redemption," with the words "no less than
 10 days nor more than 60 days prior to the date fixed for redemption;" and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. amend
 Section 8.01(a)(4) of the Indenture to increase the amount specified therein from $25,000,000
 to $100,000,000.

In connection with this Company Order, there are delivered to you herewith the following:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. Certified
 copies of the resolutions adopted by the Finance Committee of the Board of Directors of the
 Company authorizing this Company Order and the issuance and sale of the Notes by the Company
 pursuant to Section 2.05(c)(1) of the Indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. Opinions
 of Counsel addressed to you or in which it is stated that you may rely pursuant to Sections
 2.05(c)(2) and 15.05 of the Indenture;

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3. Officers'
 Certificate pursuant to Sections 2.05(c)(3) and 15.05 of the Indenture; and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4. Global
 Note (No. R-1) representing the Notes executed on behalf of the Company in accordance with
 the terms of Section 2.05(a) of the Indenture, specifying the terms of the Notes (which terms
 are incorporated by reference herein).

The Global Note representing the Notes is to be held for delivery through the facilities of DTC to J.P. Morgan Securities LLC, on behalf of the several underwriters thereof, against payment therefor at the closing in respect of the sale thereof, such closing to be held at 10:00 a.m., New York time, March 4, 2026, at the offices of Morgan, Lewis & Bockius LLP, 101 Park Avenue, New York, New York 10178. You are hereby instructed to authenticate the Global Note representing the Notes in the name of Cede & Co. as registered holder and to hold them as custodian for DTC.

Please acknowledge receipt of the Global Note representing the Notes, the instructions referred to above and the supporting documentation pursuant to the Indenture referred to above.

---

| | |
|:---|:---|
| Very truly yours, | Very truly yours, |
| AMEREN CORPORATION | AMEREN CORPORATION |
| By: | /s/ Mitchell J. Lansford |
|  | Name: Mitchell J. Lansford |
|  | Title: Vice President and Treasurer |

---

Receipt from the Company of the Global Note representing the Notes, the instructions referred to above and the supporting documentation pursuant to the Indenture in connection with the authentication and delivery of the Notes is hereby acknowledged.

---

| | |
|:---|:---|
| THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., | THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., |
| as Trustee | as Trustee |
| By: | /s/ Ann M. Dolezal |
|  | Name: Ann M. Dolezal |
|  | Title: Vice President |

---

*Company Signature Page to Company Order*

Exhibit A

<u>Form of Global Note</u>

REGISTERED REGISTERED

THIS NOTE IS A GLOBAL NOTE REGISTERED IN THE NAME OF THE DEPOSITARY (REFERRED TO HEREIN) OR A NOMINEE THEREOF AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE FOR THE INDIVIDUAL NOTES REPRESENTED HEREBY AS PROVIDED IN THE INDENTURE REFERRED TO BELOW, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE 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. UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK), TO THE TRUSTEE 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.

**AMEREN CORPORATION<br> 5.00% SENIOR NOTE DUE 2036**

---

| | |
|:---|:---|
| CUSIP: | NUMBER: R |
| ORIGINAL ISSUE DATE: March 4, 2026 | PRINCIPAL AMOUNT: $|
| INTEREST RATE: 5.00% | MATURITY DATE: May 15, 2036 |

---

AMEREN CORPORATION, a corporation of the State of Missouri (the "COMPANY"), for value received hereby promises to pay to , or registered assigns, the principal sum of DOLLARS ($) on the Maturity Date set forth above, and to pay interest thereon from and including the Original Issue Date specified above or from and including the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on May 15 and November 15 of each year, commencing November 15, 2026, and on the Maturity Date, at the per annum Interest Rate set forth above until the principal hereof is paid or made available for payment. No interest shall accrue on the Maturity Date, so long as the principal amount of this Note is paid on the Maturity Date. The interest so payable, and punctually paid or duly provided for, on any such Interest Payment Date (except for interest payable on the Maturity Date set forth above or, if applicable, upon redemption or acceleration), will, as provided in the Indenture (as defined below), be paid to the Person in whose name this Note is registered at the close of business on the Regular Record Date for such interest, which shall be the May 1 or November 1 as the case may be, whether or not a Business Day, next preceding such Interest Payment Date; provided, that the first Interest Payment Date for any part of this Note, the Original Issue Date of which is after a Regular Record Date but prior to the applicable Interest Payment Date, shall be the Interest Payment Date following the next succeeding Regular Record Date; and provided further, that interest payable on the Maturity Date set forth above or, if applicable, upon redemption or acceleration, shall be payable to the Person to whom principal shall be payable. Except as otherwise provided in the Indenture, any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date and shall be paid to the Person in whose name this Note is registered at the close of business on a Special Record Date for the payment of such defaulted interest to be fixed by the Trustee, notice whereof shall be given to Noteholders not more than fifteen days nor fewer than ten days prior to such Special Record Date. Payment of the principal of and interest and premium on this Note shall be payable pursuant to Section 2.12(a) of the Indenture.

This Note is a Global Note in respect of a duly authorized issue of 5.00% Senior Notes due 2036 (the "NOTES OF THIS SERIES", which term includes any Global Notes representing such Notes) of the Company issued and to be issued under an Indenture dated as of December 1, 2001 between the Company and The Bank of New York (The Bank of New York Mellon Trust Company, N.A., successor), as trustee (herein called the "TRUSTEE", which term includes any successor Trustee under the Indenture) and indentures supplemental thereto (collectively, the "INDENTURE"). Under the Indenture, one or more series of notes may be issued and, as used herein, the term "Notes" refers to the Notes of this Series and any other outstanding series of Notes. Reference is hereby made to the Indenture for a more complete statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Noteholders and of the terms upon which the Notes are and are to be authenticated and delivered. This Note has been issued in respect of the series designated on the first page hereof, issued in the initial aggregate principal amount of $400,000,000.

Each Note of this Series shall be dated and issued as of the date of its authentication by the Trustee and shall bear an Original Issue Date. Each Note of this Series issued upon transfer, exchange or substitution of such Note shall bear the Original Issue Date of such transferred, exchanged or substituted Note of this Series, as the case may be. The Notes of this Series shall be issued in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof.

Interest on this Note will accrue from and including the Original Issue Date specified above to, but excluding, November 15, 2026, and thereafter from and including each Interest Payment Date to, but excluding, the next succeeding Interest Payment Date, the Maturity Date or any redemption date, as the case may be.

All or a portion of the Notes of this Series may be redeemed at the option of the Company at any time or from time to time. Prior to February 15, 2036 (three months prior to the Maturity Date) (the "Par Call Date"), the Company may redeem the Notes of this Series at its option, in whole or in part, at any time and from time to time, at a redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) (a) the sum of the present values of the
 remaining scheduled payments of principal and interest thereon discounted to the redemption
 date (assuming the Notes of this Series to be redeemed matured on the Par Call Date) on a
 semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury
 Rate (as defined below) plus 15 basis points less (b) interest accrued to the redemption
 date, and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) 100% of the principal amount of the Notes
 of this Series to be redeemed,

plus, in either case, accrued and unpaid interest thereon to the redemption date.

On or after the Par Call Date, the Company may redeem the Notes of this Series at its option in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the Notes of this Series being redeemed plus accrued and unpaid interest thereon to the redemption date.

"Treasury Rate" means, with respect to any redemption date, the yield determined by the Company in accordance with the following two paragraphs.

The Treasury Rate shall be determined by the Company after 4:15 p.m., New York City time (or after such time as yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third business day preceding the redemption date based upon the yield or yields for the most recent day that appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as "Selected Interest Rates (Daily)—H.15" (or any successor designation or publication) ("H.15") under the caption "U.S. government securities—Treasury constant maturities—Nominal" (or any successor caption or heading) ("H.15 TCM"). In determining the Treasury Rate, the Company shall select, as applicable:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) the yield for the Treasury constant maturity
 on H.15 exactly equal to the period from the redemption date to the Par Call Date (the " Remaining
 Life "); or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) if there is no such Treasury constant
 maturity on H.15 exactly equal to the Remaining Life, the two yields—one yield corresponding
 to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding
 to the Treasury constant maturity on H.15 immediately longer than the Remaining Life—and
 shall interpolate to the Par Call Date on a straight-line basis (using the actual number
 of days) using such yields and rounding the result to three decimal places; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) if there is no such Treasury constant
 maturity on H.15 shorter than or longer than the Remaining Life, the yield for the single
 Treasury constant maturity on H.15 closest to the Remaining Life.

For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the redemption date.

If on the third business day preceding the redemption date H.15 TCM is no longer published, the Company shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second business day preceding such redemption date of the United States Treasury security maturing on, or with a maturity that is closest to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, the Company shall select from among these two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places.

The Company's actions and determinations in determining the redemption price shall be conclusive and binding for all purposes, absent manifest error.

The Trustee shall have no duty to determine, or to verify the Company's calculations of, the redemption price. With respect to a redemption occurring prior to the Par Call Date, the Company shall give the Trustee written notice of the redemption price promptly after the calculation thereof and the Trustee shall not be responsible for such calculation.

Subject to the following sentence, the Company shall send notice of any redemption which is required by Section 3.02(b) of the Indenture to be mailed at least 30 days but not more than 60 days before the redemption date to each Holder of the Notes of this Series to be redeemed, and, if less than all Notes of this Series are to be redeemed, the particular Notes of this Series to be redeemed will be selected by the Trustee by lot; provided that as long as the Notes of this Series are represented by global certificates registered in the name of The Depository Trust Company ("DTC"), or its nominee, beneficial interests in such global certificates will be selected for redemption by DTC in accordance with its standard procedures therefor. The Company has reserved the right to amend Section 3.02(b) of the Indenture without any consent, vote or other action by the Holders of the Notes of this Series, or any other series of Notes created after November 1, 2023, to provide that notice of any redemption shall be given in the manner provided in the Indenture not less than 10 nor more than 60 days prior to the date fixed for redemption.

Any notice of redemption at the Company's option may state that such redemption will be conditional upon receipt by the Trustee, on or prior to the date fixed for redemption, of money sufficient to pay the principal of, premium, if any, and interest on the Notes of this Series or portions thereof called for redemption, and that if such money has not been so received, such notice will be of no force and effect and the Company will not be required to redeem such Notes or portions thereof. Unless the Company defaults in payment of the redemption price, on and after the redemption date, interest will cease to accrue on the Notes of this Series or portions thereof called for redemption.

In addition, if a Tax Credit Event occurs, the Company may redeem at its option the Notes of this Series, in whole but not in part, at a redemption price equal to 101% of the principal amount thereof, plus accrued and unpaid interest thereon to the redemption date. Upon the occurrence of a Tax Credit Event, a notice of redemption of the Notes of this Series (i) may only be sent by the later of (a) the end of the calendar year in which the Notes of this Series were issued and (b) six months from the date of issuance of the Notes of this Series and (ii) shall be accompanied by a certificate from an officer of the Company stating that a Tax Credit Event has occurred.

A "TAX CREDIT EVENT" occurs with respect to the Notes of this Series if, in the Company's reasonable determination, there exists a material risk, due to the Notes of this Series (considered together with other debt) having been issued, as part of an original issuance, to one or more "specified foreign entities," as defined in Section 7701(a)(51)(B) of the Internal Revenue Code of 1986, as amended (the "CODE"), that the Company or any of its affiliates would be unable to utilize or otherwise ineligible to claim any tax credits otherwise allowed under Section 38 of the Code.

Interest payments for this Note shall be computed and paid on the basis of a 360-day year consisting of twelve 30-day months (and for any partial periods shall be calculated on the basis of the number of days elapsed in a 360-day year of twelve 30-day months). If any Interest Payment Date falls on a day that is not a Business Day, the interest due on such Interest Payment Date will be paid on the next succeeding Business Day (and without any interest or other payment in respect of any such delay). If the Maturity Date of this Note or any redemption date falls on a day that is not a Business Day, the payment of principal, premium, if any, and interest will be made on the next succeeding Business Day with the same force and effect as if made on the Maturity Date or such redemption date, and no interest on such payment shall accrue for the period from and after the Maturity Date or such redemption date.

The Company, at its option, and subject to the terms and conditions provided in the Indenture, will be discharged from any and all obligations in respect of the Notes of this Series (except for certain obligations including obligations to register the transfer or exchange of Notes of this Series, replace stolen, lost or mutilated Notes of this Series, maintain paying agencies and hold monies for payment in trust, all as set forth in the Indenture) if the Company deposits with the Trustee money, U.S. Government Obligations which through the payment of interest thereon and principal thereof in accordance with their terms will provide money, or a combination of money and U.S. Government Obligations, in any event in an amount sufficient, without reinvestment, to pay all the principal of and any premium and interest on the Notes of this Series on the dates such payments are due in accordance with the terms of the Notes of this Series.

If an Event of Default shall occur and be continuing with respect to the Notes of this Series, the principal of and interest on the Notes of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modifications of the rights and obligations of the Company and the rights of the Noteholders under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in aggregate principal amount of the Outstanding Notes, considered as one class, provided that if a proposed amendment directly affects the rights of the Holders of Notes of one or more, but less than all of, series of Outstanding Notes, then with the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Notes of all series so directly affected, considered as one class. 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 thereof whether or not notation of such consent or waiver is made upon this Note.

As set forth in and subject to the provisions of the Indenture, no Holder of any Notes will have any right to institute any proceeding with respect to the Indenture or for any remedy thereunder unless such Holder shall have previously given to the Trustee written notice of a continuing Event of Default with respect to such Notes, the Holders of a majority in aggregate principal amount of the Notes of all series then outstanding in respect of which an Event of Default has occurred and is continuing, considered as one class, shall have made written request and offered reasonable indemnity to the Trustee to institute such proceeding as Trustee and the Trustee shall have failed to institute such proceeding within 60 days after its receipt of such notice; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof for the enforcement of payment of the principal of and any premium or interest on this Note on or after the respective due dates expressed herein.

No reference herein to the Indenture and to provisions of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and any premium and interest on this Note at the times, places and rates and the coin or currency prescribed in the Indenture.

As provided in the Indenture and subject to certain limitations therein set forth, this Note may be transferred only as permitted by the legend hereto and the provisions of the Indenture.

The Company has reserved the right to amend the Indenture without any consent, vote or other action by the Holders of the Notes of this Series, or any other series of Notes created after November 1, 2023, to increase the amount specified in Section 8.01(a)(4) of the Indenture from $25,000,000 to $100,000,000.

The Indenture and the Notes shall be governed by, and construed in accordance with, the laws of the State of New York without regard to conflicts of law principles thereof.

Unless the certificate of authentication hereon has been executed by the Trustee, directly or through an Authenticating Agent by manual signature of an authorized officer, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

All terms used in this Note that are defined in the Indenture shall have the meanings assigned to them in the Indenture unless otherwise indicated herein.

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

---

| |
|:---|
| AMEREN CORPORATION |
| By: |
| Name: |
| Title: |
| Attest: |
| Name: |
| Title: |

---

TRUSTEE'S CERTIFICATE OF AUTHENTICATION

Dated:

This Note is one of the Notes of the series herein designated, described or provided for in the within-mentioned Indenture.

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., *As Trustee*

 

By:   <br> *Authorized Signatory*

ABBREVIATIONS

The following abbreviations, when used in the inscription on the face of this instrument, shall be construed as though they were written out in full according to applicable laws or regulations:

---

| | | | | |
|:---|:---|:---|:---|:---|
| TEN COM -- as tenants in common | UNIF GIFT MIN ACT -- | | Custodian | |
|  |  | (Cust) |  | (Minor) |
| TEN ENT -- as tenants by the entireties | Under Uniform Gifts to Minors | Under Uniform Gifts to Minors | Under Uniform Gifts to Minors | Under Uniform Gifts to Minors |
| JT TEN -- as joint tenants with right of survivorship and not as tenants in common | | | | |
|  | State | State | State | State |

---

Additional abbreviations may also be used<br> though not in the above list.

FOR VALUE RECEIVED the undersigned hereby sell(s),<br> assign(s) and transfer(s) unto

PLEASE INSERT SOCIAL SECURITY OR OTHER<br> IDENTIFYING NUMBER OF ASSIGNEE

Please print or typewrite name and address<br> including postal zip code of assignee

  <br> the within note and all rights thereunder, hereby irrevocably constituting and appointing _________ attorney to transfer said note on the books of the Company, with full power of substitution in the premises.

---

| | |
|:---|:---|
| Dated: | |
| | NOTICE: The signature to this assignment must correspond with the name as written upon the face of the within instrument in every particular, without alteration or enlargement or any change whatever. |
| | Signature(s) must be guaranteed by a financial institution that is a member of the Securities Transfer Agents Medallion Program ("STAMP"), the Stock Exchange Medallion Program ("SEMP") or the New York Stock Exchange, Inc. Medallion Signature Program ("MSP"). |

---

## Exhibit 4.4

**Exhibit 4.4**

REGISTERED REGISTERED

THIS NOTE IS A GLOBAL NOTE REGISTERED IN THE NAME OF THE DEPOSITARY (REFERRED TO HEREIN) OR A NOMINEE THEREOF AND, UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE FOR THE INDIVIDUAL NOTES REPRESENTED HEREBY AS PROVIDED IN THE INDENTURE REFERRED TO BELOW, THIS NOTE MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE 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. UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY (55 WATER STREET, NEW YORK, NEW YORK), TO THE TRUSTEE 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.

**AMEREN CORPORATION<br> 5.00% SENIOR NOTE DUE 2036**

---

| | |
|:---|:---|
| CUSIP: 023608 AS1 | NUMBER: R-1 |
| ORIGINAL ISSUE DATE: March 4, 2026 | PRINCIPAL AMOUNT: $400,000,000 |
| INTEREST RATE: 5.00% | MATURITY DATE: May 15, 2036 |

---

AMEREN CORPORATION, a corporation of the State of Missouri (the "COMPANY"), for value received hereby promises to pay to CEDE & CO., or registered assigns, the principal sum of FOUR HUNDRED MILLION DOLLARS ($400,000,000) on the Maturity Date set forth above, and to pay interest thereon from and including the Original Issue Date specified above or from and including the most recent Interest Payment Date to which interest has been paid or duly provided for, semi-annually in arrears on May 15 and November 15 of each year, commencing November 15, 2026, and on the Maturity Date, at the per annum Interest Rate set forth above until the principal hereof is paid or made available for payment. No interest shall accrue on the Maturity Date, so long as the principal amount of this Note is paid on the Maturity Date. The interest so payable, and punctually paid or duly provided for, on any such Interest Payment Date (except for interest payable on the Maturity Date set forth above or, if applicable, upon redemption or acceleration), will, as provided in the Indenture (as defined below), be paid to the Person in whose name this Note is registered at the close of business on the Regular Record Date for such interest, which shall be the May 1 or November 1 as the case may be, whether or not a Business Day, next preceding such Interest Payment Date; provided, that the first Interest Payment Date for any part of this Note, the Original Issue Date of which is after a Regular Record Date but prior to the applicable Interest Payment Date, shall be the Interest Payment Date following the next succeeding Regular Record Date; and provided further, that interest payable on the Maturity Date set forth above or, if applicable, upon redemption or acceleration, shall be payable to the Person to whom principal shall be payable. Except as otherwise provided in the Indenture, any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such Regular Record Date and shall be paid to the Person in whose name this Note is registered at the close of business on a Special Record Date for the payment of such defaulted interest to be fixed by the Trustee, notice whereof shall be given to Noteholders not more than fifteen days nor fewer than ten days prior to such Special Record Date. Payment of the principal of and interest and premium on this Note shall be payable pursuant to Section 2.12(a) of the Indenture.

This Note is a Global Note in respect of a duly authorized issue of 5.00% Senior Notes due 2036 (the "NOTES OF THIS SERIES", which term includes any Global Notes representing such Notes) of the Company issued and to be issued under an Indenture dated as of December 1, 2001 between the Company and The Bank of New York (The Bank of New York Mellon Trust Company, N.A., successor), as trustee (herein called the "TRUSTEE", which term includes any successor Trustee under the Indenture) and indentures supplemental thereto (collectively, the "INDENTURE"). Under the Indenture, one or more series of notes may be issued and, as used herein, the term "Notes" refers to the Notes of this Series and any other outstanding series of Notes. Reference is hereby made to the Indenture for a more complete statement of the respective rights, limitations of rights, duties and immunities thereunder of the Company, the Trustee and the Noteholders and of the terms upon which the Notes are and are to be authenticated and delivered. This Note has been issued in respect of the series designated on the first page hereof, issued in the initial aggregate principal amount of $400,000,000.

Each Note of this Series shall be dated and issued as of the date of its authentication by the Trustee and shall bear an Original Issue Date. Each Note of this Series issued upon transfer, exchange or substitution of such Note shall bear the Original Issue Date of such transferred, exchanged or substituted Note of this Series, as the case may be. The Notes of this Series shall be issued in minimum denominations of $2,000 and integral multiples of $1,000 in excess thereof.

Interest on this Note will accrue from and including the Original Issue Date specified above to, but excluding, November 15, 2026, and thereafter from and including each Interest Payment Date to, but excluding, the next succeeding Interest Payment Date, the Maturity Date or any redemption date, as the case may be.

All or a portion of the Notes of this Series may be redeemed at the option of the Company at any time or from time to time. Prior to February 15, 2036 (three months prior to the Maturity Date) (the "Par Call Date"), the Company may redeem the Notes of this Series at its option, in whole or in part, at any time and from time to time, at a redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) (a) the sum of the present values of the remaining scheduled payments of principal and interest thereon
discounted to the redemption date (assuming the Notes of this Series to be redeemed matured on the Par Call Date) on a semi-annual basis
(assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate (as defined below) plus 15 basis points less (b) interest
accrued to the redemption date, and

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) 100% of the principal amount of the Notes of this Series to be redeemed,

plus, in either case, accrued and unpaid interest thereon to the redemption date.

On or after the Par Call Date, the Company may redeem the Notes of this Series at its option in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the Notes of this Series being redeemed plus accrued and unpaid interest thereon to the redemption date.

"Treasury Rate" means, with respect to any redemption date, the yield determined by the Company in accordance with the following two paragraphs.

The Treasury Rate shall be determined by the Company after 4:15 p.m., New York City time (or after such time as yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third business day preceding the redemption date based upon the yield or yields for the most recent day that appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as "Selected Interest Rates (Daily)—H.15" (or any successor designation or publication) ("H.15") under the caption "U.S. government securities—Treasury constant maturities—Nominal" (or any successor caption or heading) ("H.15 TCM"). In determining the Treasury Rate, the Company shall select, as applicable:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the redemption date
to the Par Call Date (the " Remaining Life "); or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2) if there is no such Treasury constant maturity on H.15 exactly equal to the Remaining Life, the two yields—one
yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant
maturity on H.15 immediately longer than the Remaining Life—and shall interpolate to the Par Call Date on a straight-line basis
(using the actual number of days) using such yields and rounding the result to three decimal places; or

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3) if there is no such Treasury constant maturity on H.15 shorter than or longer than the Remaining Life,
the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life.

For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the redemption date.

If on the third business day preceding the redemption date H.15 TCM is no longer published, the Company shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second business day preceding such redemption date of the United States Treasury security maturing on, or with a maturity that is closest to, the Par Call Date, as applicable. If there is no United States Treasury security maturing on the Par Call Date but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding the Par Call Date. If there are two or more United States Treasury securities maturing on the Par Call Date or two or more United States Treasury securities meeting the criteria of the preceding sentence, the Company shall select from among these two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places.

The Company's actions and determinations in determining the redemption price shall be conclusive and binding for all purposes, absent manifest error.

The Trustee shall have no duty to determine, or to verify the Company's calculations of, the redemption price. With respect to a redemption occurring prior to the Par Call Date, the Company shall give the Trustee written notice of the redemption price promptly after the calculation thereof and the Trustee shall not be responsible for such calculation.

Subject to the following sentence, the Company shall send notice of any redemption which is required by Section 3.02(b) of the Indenture to be mailed at least 30 days but not more than 60 days before the redemption date to each Holder of the Notes of this Series to be redeemed, and, if less than all Notes of this Series are to be redeemed, the particular Notes of this Series to be redeemed will be selected by the Trustee by lot; provided that as long as the Notes of this Series are represented by global certificates registered in the name of The Depository Trust Company ("DTC"), or its nominee, beneficial interests in such global certificates will be selected for redemption by DTC in accordance with its standard procedures therefor. The Company has reserved the right to amend Section 3.02(b) of the Indenture without any consent, vote or other action by the Holders of the Notes of this Series, or any other series of Notes created after November 1, 2023, to provide that notice of any redemption shall be given in the manner provided in the Indenture not less than 10 nor more than 60 days prior to the date fixed for redemption.

Any notice of redemption at the Company's option may state that such redemption will be conditional upon receipt by the Trustee, on or prior to the date fixed for redemption, of money sufficient to pay the principal of, premium, if any, and interest on the Notes of this Series or portions thereof called for redemption, and that if such money has not been so received, such notice will be of no force and effect and the Company will not be required to redeem such Notes or portions thereof. Unless the Company defaults in payment of the redemption price, on and after the redemption date, interest will cease to accrue on the Notes of this Series or portions thereof called for redemption.

In addition, if a Tax Credit Event occurs, the Company may redeem at its option the Notes of this Series, in whole but not in part, at a redemption price equal to 101% of the principal amount thereof, plus accrued and unpaid interest thereon to the redemption date. Upon the occurrence of a Tax Credit Event, a notice of redemption of the Notes of this Series (i) may only be sent by the later of (a) the end of the calendar year in which the Notes of this Series were issued and (b) six months from the date of issuance of the Notes of this Series and (ii) shall be accompanied by a certificate from an officer of the Company stating that a Tax Credit Event has occurred.

A "TAX CREDIT EVENT" occurs with respect to the Notes of this Series if, in the Company's reasonable determination, there exists a material risk, due to the Notes of this Series (considered together with other debt) having been issued, as part of an original issuance, to one or more "specified foreign entities," as defined in Section 7701(a)(51)(B) of the Internal Revenue Code of 1986, as amended (the "CODE"), that the Company or any of its affiliates would be unable to utilize or otherwise ineligible to claim any tax credits otherwise allowed under Section 38 of the Code.

Interest payments for this Note shall be computed and paid on the basis of a 360-day year consisting of twelve 30-day months (and for any partial periods shall be calculated on the basis of the number of days elapsed in a 360-day year of twelve 30-day months). If any Interest Payment Date falls on a day that is not a Business Day, the interest due on such Interest Payment Date will be paid on the next succeeding Business Day (and without any interest or other payment in respect of any such delay). If the Maturity Date of this Note or any redemption date falls on a day that is not a Business Day, the payment of principal, premium, if any, and interest will be made on the next succeeding Business Day with the same force and effect as if made on the Maturity Date or such redemption date, and no interest on such payment shall accrue for the period from and after the Maturity Date or such redemption date.

The Company, at its option, and subject to the terms and conditions provided in the Indenture, will be discharged from any and all obligations in respect of the Notes of this Series (except for certain obligations including obligations to register the transfer or exchange of Notes of this Series, replace stolen, lost or mutilated Notes of this Series, maintain paying agencies and hold monies for payment in trust, all as set forth in the Indenture) if the Company deposits with the Trustee money, U.S. Government Obligations which through the payment of interest thereon and principal thereof in accordance with their terms will provide money, or a combination of money and U.S. Government Obligations, in any event in an amount sufficient, without reinvestment, to pay all the principal of and any premium and interest on the Notes of this Series on the dates such payments are due in accordance with the terms of the Notes of this Series.

If an Event of Default shall occur and be continuing with respect to the Notes of this Series, the principal of and interest on the Notes of this series may be declared due and payable in the manner and with the effect provided in the Indenture.

The Indenture permits, with certain exceptions as therein provided, the amendment thereof and the modifications of the rights and obligations of the Company and the rights of the Noteholders under the Indenture at any time by the Company and the Trustee with the consent of the Holders of a majority in aggregate principal amount of the Outstanding Notes, considered as one class, provided that if a proposed amendment directly affects the rights of the Holders of Notes of one or more, but less than all of, series of Outstanding Notes, then with the consent only of the Holders of a majority in aggregate principal amount of the Outstanding Notes of all series so directly affected, considered as one class. 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 thereof whether or not notation of such consent or waiver is made upon this Note.

As set forth in and subject to the provisions of the Indenture, no Holder of any Notes will have any right to institute any proceeding with respect to the Indenture or for any remedy thereunder unless such Holder shall have previously given to the Trustee written notice of a continuing Event of Default with respect to such Notes, the Holders of a majority in aggregate principal amount of the Notes of all series then outstanding in respect of which an Event of Default has occurred and is continuing, considered as one class, shall have made written request and offered reasonable indemnity to the Trustee to institute such proceeding as Trustee and the Trustee shall have failed to institute such proceeding within 60 days after its receipt of such notice; provided, however, that such limitations do not apply to a suit instituted by the Holder hereof for the enforcement of payment of the principal of and any premium or interest on this Note on or after the respective due dates expressed herein.

No reference herein to the Indenture and to provisions of this Note or of the Indenture shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of and any premium and interest on this Note at the times, places and rates and the coin or currency prescribed in the Indenture.

As provided in the Indenture and subject to certain limitations therein set forth, this Note may be transferred only as permitted by the legend hereto and the provisions of the Indenture.

The Company has reserved the right to amend the Indenture without any consent, vote or other action by the Holders of the Notes of this Series, or any other series of Notes created after November 1, 2023, to increase the amount specified in Section 8.01(a)(4) of the Indenture from $25,000,000 to $100,000,000.

The Indenture and the Notes shall be governed by, and construed in accordance with, the laws of the State of New York without regard to conflicts of law principles thereof.

Unless the certificate of authentication hereon has been executed by the Trustee, directly or through an Authenticating Agent by manual signature of an authorized officer, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose.

All terms used in this Note that are defined in the Indenture shall have the meanings assigned to them in the Indenture unless otherwise indicated herein.

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

---

| | |
|:---|:---|
| AMEREN CORPORATION | AMEREN CORPORATION |
| By: | /s/ Mitchell J. Lansford |
| Name: | Mitchell J. Lansford |
| Title: | Vice President and Treasurer |
| Attest: | /s/ Jonathan T. Shade |
| Name: | Jonathan T. Shade |
| Title: | Deputy Corporate Secretary |

---

TRUSTEE'S CERTIFICATE OF AUTHENTICATION

Dated: March 4, 2026

This Note is one of the Notes of the series herein designated, described or provided for in the within-mentioned Indenture.

THE BANK OF NEW YORK MELLON TRUST COMPANY, N.A., *As Trustee*

 

---

| | |
|:---|:---|
| By: | /s/ Ann M. Dolezal |
|  | Authorized Signatory |

---

 

ABBREVIATIONS

The following abbreviations, when used in the inscription on the face of this instrument, shall be construed as though they were written out in full according to applicable laws or regulations:

---

| | | | | |
|:---|:---|:---|:---|:---|
| TEN COM -- as tenants in common | UNIF GIFT MIN ACT -- | | Custodian | |
|  |  | (Cust) |  | (Minor) |
| TEN ENT -- as tenants by the entireties | Under Uniform Gifts to Minors | Under Uniform Gifts to Minors | Under Uniform Gifts to Minors | Under Uniform Gifts to Minors |
| JT TEN -- as joint tenants with right of survivorship and not as tenants in common | | | | |
|  | State | State | State | State |

---

Additional abbreviations may also be used<br> though not in the above list.

FOR VALUE RECEIVED the undersigned hereby sell(s),<br> assign(s) and transfer(s) unto

PLEASE INSERT SOCIAL SECURITY OR OTHER<br> IDENTIFYING NUMBER OF ASSIGNEE

Please print or typewrite name and address<br> including postal zip code of assignee

  <br> the within note and all rights thereunder, hereby irrevocably constituting and appointing _________ attorney to transfer said note on the books of the Company, with full power of substitution in the premises.

---

| | |
|:---|:---|
| Dated: | |
| | NOTICE: The signature to this assignment must correspond with the name as written upon the face of the within instrument in every particular, without alteration or enlargement or any change whatever. |
| | Signature(s) must be guaranteed by a financial institution that is a member of the Securities Transfer Agents Medallion Program ("STAMP"), the Stock Exchange Medallion Program ("SEMP") or the New York Stock Exchange, Inc. Medallion Signature Program ("MSP"). |

---

## Exhibit 5.1

**Exhibit 5.1**![](tm267933d1_ex5-1img01.jpg)

March 4, 2026

Ameren Corporation

1901 Chouteau Avenue

St. Louis, Missouri 63103

Ladies and Gentlemen:

I am Vice President and Deputy General Counsel of Ameren Corporation, a Missouri corporation (the "Company"). The Company has filed with the Securities and Exchange Commission (the "Commission") a Registration Statement on Form S-3 (Registration No. 333-274977) (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), with respect to the registration of an unspecified amount of securities, which became effective on October 13, 2023. On March 4, 2026, the Company issued and sold $400,000,000 principal amount of its 5.00% Senior Notes due 2036 (the "Notes") under an Indenture, dated as of December 1, 2001, between the Company and The Bank of New York Mellon Trust Company, N.A. (as successor to The Bank of New York), as trustee (the "Trustee"), as amended and supplemented (the "Indenture").

In connection with the issuance and sale of the Notes by the Company, I, or persons under my supervision and control, have reviewed originals (or copies certified or otherwise identified to my satisfaction) of (1) the Registration Statement; (2) a prospectus dated October 13, 2023 (the "Base Prospectus") forming a part of the Registration Statement, as supplemented by a prospectus supplement dated February 26, 2026 (the "Prospectus Supplement") relating to the Notes, both such Base Prospectus and Prospectus Supplement filed pursuant to Rule 424 under the Securities Act; (3) the Company's Restated Articles of Incorporation, as amended, and By-Laws, as amended, each as in effect on the date hereof; (4) the Indenture; (5) a specimen of the Notes; and (6) corporate and other documents, records and papers and certificates of public officials. In addition, I, or persons under my supervision and control, have reviewed such other documents and materials as I have deemed necessary or appropriate for purposes of this opinion. In connection with such review, I have assumed the genuineness of all signatures, the legal capacity of natural persons, the conformity to the originals of the documents submitted to me as certified or photostatic copies, the authenticity of the originals of such documents and all documents submitted to me as originals and the correctness of all statements of fact contained in such original documents. I have relied upon a certificate of the Trustee as to the authentication and delivery of the Notes under the Indenture.

![](tm267933d1_ex5-1img007.jpg)

On the basis of such review, and after consultation with other company attorneys as I have deemed appropriate, I am of the opinion that the Notes are valid and binding obligations of the Company, except as may be limited by bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other similar laws affecting creditors' rights generally, general equitable principles (whether considered in a proceeding in equity or at law) and concepts of materiality, reasonableness, good faith and fair dealing and the discretion of the court before which any matter is brought.

This opinion is limited to the laws of the States of Missouri and New York and the federal laws of the United States of America insofar as they bear on the matters covered hereby. As to all matters of New York law, I have relied, with your consent, upon an opinion letter dated the date hereof rendered to you by Morgan, Lewis & Bockius LLP, New York, New York. As to all matters of Missouri law, Morgan, Lewis & Bockius LLP is authorized to rely upon this opinion as if it were addressed to them.

I hereby consent to the reference to me under the heading "Legal Matters" in the Prospectus Supplement, to the references to me in the Registration Statement, and to the filing of this opinion as an exhibit to the Company's Current Report on Form 8-K to be filed on or about the date hereof, which will be incorporated by reference in the Registration Statement. In giving the foregoing consents, I do not thereby admit that I am within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission thereunder.

---

| |
|:---|
| Very truly yours, |
| /s/ Stephen C. Lee, Esq. |
| Stephen C. Lee, Esq. |
| Vice President and |
| Deputy General Counsel |

---

![](tm267933d1_ex5-1img004.jpg)

## Exhibit 5.2

**Exhibit 5.2**

![](tm267933d1_ex5-2img001.jpg)

March 4, 2026

Ameren Corporation

1901 Chouteau Avenue

St. Louis, Missouri 63103

Ladies and Gentlemen:

Ameren Corporation, a Missouri corporation (the "Company"), has filed with the Securities and Exchange Commission (the "Commission") a Registration Statement on Form S-3 (Registration No. 333-274977) (the "Registration Statement") under the Securities Act of 1933, as amended (the "Securities Act"), with respect to the registration of an unspecified amount of securities, which became effective on October 13, 2023. On March 4, 2026, the Company issued and sold $400,000,000 principal amount of its 5.00% Senior Notes due 2036 (the "Notes") under an Indenture, dated as of December 1, 2001, between the Company and The Bank of New York Mellon Trust Company, N.A. (as successor to The Bank of New York), as trustee (the "Trustee"), as amended and supplemented (the "Indenture").

In connection with the issuance and sale of the Notes by the Company, we have reviewed originals (or copies certified or otherwise identified to our satisfaction) of (1) the Registration Statement; (2) a prospectus dated October 13, 2023 (the "Base Prospectus") forming a part of the Registration Statement, as supplemented by a prospectus supplement dated February 26, 2026 (the "Prospectus Supplement") relating to the Notes, both such Base Prospectus and Prospectus Supplement filed pursuant to Rule 424 under the Securities Act; (3) the Company's Restated Articles of Incorporation, as amended, and By-Laws, as amended, each as in effect on the date hereof; (4) the Indenture; (5) a specimen of the Notes; and (6) corporate and other documents, records and papers and certificates of public officials. In addition, we have reviewed such other documents and materials as we have deemed necessary or appropriate for purposes of this opinion. In connection with such review, we have assumed the genuineness of all signatures, the legal capacity of natural persons, the conformity to the originals of the documents submitted to us as certified or photostatic copies, the authenticity of the originals of such documents and all documents submitted to us as originals and the correctness of all statements of fact contained in such original documents. We have relied upon a certificate of the Trustee as to the authentication and delivery of the Notes under the Indenture.

---

| | |
|:---|:---|
| **Morgan, Lewis & Bockius llp** | **Morgan, Lewis & Bockius llp** |
| 101 Park Avenue | 101 Park Avenue |
| New York, NY 10178-0060 | ![](tm267933d1_ex5-1img005.jpg)+1.212.309.6000 |
| United States | ![](tm267933d1_ex5-1img006.jpg)+1.212.309.6001 |

---

Ameren Corporation

March 4, 2026

On the basis of such review, we are of the opinion that the Notes are valid and binding obligations of the Company, except as may be limited by bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other similar laws affecting creditors' rights generally, general equitable principles (whether considered in a proceeding in equity or at law) and concepts of materiality, reasonableness, good faith and fair dealing and the discretion of the court before which any matter is brought.

This opinion is limited to the laws of the States of New York and Missouri and the federal laws of the United States of America insofar as they bear on the matters covered hereby. As to all matters of Missouri law, we have relied, with your consent, upon an opinion letter dated the date hereof rendered to you by Stephen C. Lee, Esq., Vice President and Deputy General Counsel of the Company. As to all matters of New York law, Mr. Lee is authorized to rely upon this opinion as if it were addressed to him.

We hereby consent to the reference to us under the heading "Legal Matters" in each of the Base Prospectus and the Prospectus Supplement, to the references to us in the Registration Statement, including under the heading "Legal Matters" in the Base Prospectus, and to the filing of this opinion as an exhibit to the Company's Current Report on Form 8-K to be filed on or about the date hereof, which will be incorporated by reference in the Registration Statement. In giving the foregoing consents, we do not thereby admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission thereunder.

Very truly yours,

/s/ Morgan, Lewis & Bockius LLP