T. Rowe Price Reports 2.7% Stake in Ameren

Ameren Corporation ownership disclosure: T. Rowe Price Investment Management, Inc. reports beneficial ownership of 7,520,678 shares of Common Stock, representing 2.7% of the class.

Rhea-AI Filing Summary

Ameren Corporation ownership disclosure: T. Rowe Price Investment Management, Inc. reports beneficial ownership of 7,520,678 shares of Common Stock, representing 2.7% of the class. The filing states sole voting power of 7,078,989 shares and sole dispositive power of 7,520,678 shares. The statement is signed on 05/15/2026.

Insights

Institutional Ownership Analyst

T. Rowe Price discloses a passive sub-5% stake in Ameren.

T. Rowe Price Investment Management, Inc. reports beneficial ownership of 7,520,678 shares, equal to 2.7% of the class as stated in the filing. The filing includes counts for voting and dispositive power and affirms ownership under the Schedule 13G/A framework.

Such filings typically indicate passive investment reporting; follow-up filings could show changes in position. The signature date is 05/15/2026, which anchors the reported holding.

Key Figures

Beneficial ownership: 7,520,678 shares Percent of class: 2.7% Sole voting power: 7,078,989 shares

3 metrics

Beneficial ownership 7,520,678 shares reported beneficially owned (Schedule 13G/A)

Percent of class 2.7% percent of class reported in filing

Sole voting power 7,078,989 shares sole power to vote or to direct the vote

Key Terms

Schedule 13G/A, Beneficial ownership, Sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1 ) AMEREN CORPORATION COMMON STOCK"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership financial

"Item 4. | Ownership (a) | Amount beneficially owned: 7520678"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole dispositive power regulatory

"(iii) Sole power to dispose or to direct the disposition of: 7520678"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

FAQ

What stake does T. Rowe Price report in Ameren (AEE)?

T. Rowe Price reports beneficial ownership of 7,520,678 shares, representing 2.7% of the class. The filing lists sole voting power on 7,078,989 shares and sole dispositive power on 7,520,678 shares, signed 05/15/2026.

Does this Schedule 13G/A indicate active control of Ameren by T. Rowe Price?

No, the filing reports a passive ownership disclosure under Schedule 13G/A, not an acquisition of control. It documents voting and dispositive power counts for reporting purposes and affirms ownership as of the signature date 05/15/2026.

What does 'sole dispositive power' of 7,520,678 shares mean here?

It means T. Rowe Price reports exclusive authority to direct disposition of those 7,520,678 shares. This is a factual statement of authority in the filing and does not by itself indicate changes to company governance or control.

When was this ownership amount certified in the filing?

The Schedule 13G/A is signed by Ellen York, Vice President, with the signature date shown as 05/15/2026. That date is the filing's attestation of the reported ownership figures.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/15/2026 - 10:06 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

AMEREN CORPORATION

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

023608102

(CUSIP Number)

03/31/2026

(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)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 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 7,078,989.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 7,520,678.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

7,520,678.00

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)

2.7 %

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: 7520678
(b)	Percent of class: 2.7 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 7078989
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 7520678
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	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:	05/15/2026