# EDGAR Filing Document

**Accession Number:** 0001002910
**File Stem:** 0001104659-25-096700
**Filing Date:** 2025-10
**Character Count:** 4846
**Document Hash:** ef243b288f2d82a17441dae69387b2b1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001104659-25-096700.hdr.sgml**: 20251003

**ACCESSION NUMBER**: 0001104659-25-096700

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20251002

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**FILED AS OF DATE**: 20251003

**DATE AS OF CHANGE**: 20251003

**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:** 251374628

**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): October 2, 2025**

**AMEREN CORPORATION**

**(Exact Name of Registrant as Specified in Charter)**

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| | | |
|:---|:---|:---|
| &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; **(IRS Employer Identification<br> Number)** |

---

**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:

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

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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). ◻

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 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**

 ****

On and effective October 2, 2025 (the "Effective Date"), Mark C. Birk informed Ameren Corporation (the "Company") of his decision to retire from his position as Chairman and President of Union Electric Company, doing business as Ameren Missouri ("Ameren Missouri"), and from each other position he holds with subsidiaries of the Company.

As of the Effective Date, Michael L. Moehn, who currently serves as the Company's Senior Executive Vice President and Chief Financial Officer, has been elected to the additional position of Interim Chairman and President of Ameren Missouri. Mr. Moehn has served as the Company's Chief Financial Officer since 2019 and previously served as Chairman and President of Ameren Missouri from 2014 to 2019.

**SIGNATURES**

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

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| | |
|:---|:---|
| AMEREN CORPORATION | AMEREN CORPORATION |
| (Registrant) | (Registrant) |
| By: | /s/ Stephen C. Lee |
| Name: | Stephen C. Lee |
| Title: | Vice President, Interim General Counsel and Secretary |

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Date: October 3, 2025