# EDGAR Filing Document

**Accession Number:** 0001002910
**File Stem:** 0002093735-25-000002
**Filing Date:** 2025-11
**Character Count:** 4701
**Document Hash:** 1c17179d5c53402ed667cd45d6e3f452
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002093735-25-000002.hdr.sgml**: 20251104

**ACCESSION NUMBER**: 0002093735-25-000002

**CONFORMED SUBMISSION TYPE**: 3

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251025

**FILED AS OF DATE**: 20251104

**DATE AS OF CHANGE**: 20251104

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Arora Ajay K
- **CENTRAL INDEX KEY:** 0002093735

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 3
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-14756
- **FILM NUMBER:** 251449468

**MAIL ADDRESS:**
- **STREET 1:** 1901 CHOUTEAU AVENUE
- **CITY:** SAINT LOUIS
- **STATE:** MO
- **ZIP:** 63103
**ISSUER**: 

**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

**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

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 3

### INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Arora Ajay K<br><sub>(Last) (First) (Middle)</sub><br>1901 CHOUTEAU AVENUE<br><sub>(Street)</sub><br>SAINT LOUIS, MO 63103<br><sub>(City) (State) (Zip)</sub> | **3. Issuer Name and Ticker or Trading Symbol**<br>AMEREN CORP [ AEE ] | **5. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  |
| **2. Date of Event Requiring Statement (Month/Day/Year)**<br>2025-10-25 | **4. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director   [ ] 10% Owner<br>[X] Officer (give title below)   [ ] Other (specify below)<br>_SVP of Subsidiary_ | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities Beneficially Owned

---

|  |  |  |  |
| --- | --- | --- | --- |
| 1. Title of Security | 2. Amount of Securities Beneficially Owned | 3. Ownership Form | 4. Nature of Indirect Beneficial Ownership |
| Common Stock, $.01 Par Value | 1699<sup>(1)</sup> | I | By 401(k) |
| Common Stock, $.01 Par Value | 24037 | I | By family trust |
| Common Stock, $.01 Par Value | 12541<sup>(2)</sup> | D |  |

---

## Table II - Derivative Securities Beneficially Owned

---

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 2. Date Exercisable and Expiration Date (Month/Day/Year) | 3. Title and Amount of Underlying Securities | 3. Title and Amount of Underlying Securities | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 4. Conversion or Exercise Price | 5. Ownership Form | 6. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) Represents the estimated number of share equivalents held by the reporting person in the unitized stock fund included in the Ameren Corporation Savings Investment Plan as of October 31, 2025.

(2) Amount includes 3,653 restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan.

**Signature:** Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Ajay K. Arora  
**Date:** 2025-11-04

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**