[SCHEDULE 13G] Ameren Corporation SEC Filing

Rhea-AI Filing Summary

T. Rowe Price Investment Management, Inc. reports a material passive stake in Ameren Corporation, holding 14,362,684 shares, equal to 5.2% of the common stock. The filer discloses sole voting power for 13,437,982 shares and sole dispositive power for all 14,362,684 shares, with no shared voting or dispositive authority. The Schedule 13G classification and the filer’s certification indicate these shares are held in the ordinary course of business and are not reported as intended to change or influence control. The filing clarifies ownership magnitude and voting authority without announcing any change in control.

Positive

• Material institutional stake: T. Rowe Price holds 14,362,684 shares (5.2%), a level considered significant for investor monitoring.
• Clear voting disclosure: The filing specifies sole voting power for 13,437,982 shares, improving transparency on who controls a substantial voting block.

Negative

• None.

Insights

Financial Analyst

TL;DR: T. Rowe Price holds a material 5.2% passive stake in Ameren; the disclosure is informative but does not signal an active control move.

The filing reports 14,362,684 shares (5.2%) under sole dispositive control and 13,437,982 shares under sole voting control. For investors, a >5% institutional stake is material because it can influence liquidity and shareholder voting outcomes, yet the Schedule 13G classification and the filer’s certification indicate a passive position. This is a routine institutional ownership disclosure that increases transparency about major holders without presenting immediate governance changes.

Corporate Governance Expert

TL;DR: The disclosure documents clear sole voting and dispositive authority by an institutional investor holding a meaningful 5.2% stake.

The report specifies sole voting power for 13,437,982 shares and sole dispositive power for 14,362,684 shares, with no shared powers reported. From a governance perspective, this clarifies who controls voting on a meaningful block of shares; however, the filer affirms the stake is held passively, reducing immediate concern about activist intent. The information is material to shareholders assessing ownership concentration and potential voting dynamics.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

AMEREN CORPORATION

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

023608102

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 023608102

1

Names of Reporting Persons

T. Rowe Price Investment Management, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MARYLAND

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 13,437,982.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 14,362,684.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

14,362,684.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.2 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: AMEREN CORPORATION
(b)	Address of issuer's principal executive offices: 1901 CHOUTEAU AVE, MC 1310, ST LOUIS, MO, 63166-6149
Item 2.
(a)	Name of person filing: T. Rowe Price Investment Management, Inc.
(b)	Address or principal business office or, if none, residence: 1307 Point Street, Baltimore, MD 21231
(c)	Citizenship: Maryland
(d)	Title of class of securities: COMMON STOCK
(e)	CUSIP No.: 023608102
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 14362684
(b)	Percent of class: 5.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 13437982
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 14362684
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11. T. Rowe Price Investment Management, Inc. hereby declares and affirms that the filing of Schedule 13G shall not be construed as an admission that Price Investment Management is the beneficial owner of the securities referred to, which beneficial ownership is expressly denied.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

T. Rowe Price Investment Management, Inc.

Signature:	Ellen York
Name/Title:	Vice President
Date:	08/14/2025

FAQ

How many Ameren (AEE) shares does T. Rowe Price own?

T. Rowe Price reports owning 14,362,684 shares of Ameren, representing 5.2% of the common stock.

Does T. Rowe Price have voting control over its Ameren shares?

Yes. The filer reports sole voting power for 13,437,982 shares and no shared voting power.

Is this a passive or active disclosure for AEE?

This is a Schedule 13G filing, indicating a passive institutional disclosure rather than an active 13D control filing.

Are the reported holdings held on behalf of another person?

The filing indicates Not Applicable for ownership on behalf of another person, per the disclosure.

What type of reporting person filed the Schedule 13G?

The reporting entity is an investment adviser (Type: IA) that disclosed the stake.