AMEREN CORP

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Other Matters

The Board of Directors is not presently aware of any matters to be conducted at the meeting other than those discussed in this proxy statement. If any other matter properly comes before the shareholders for a vote at the meeting, the proxy holders will vote your shares in accordance with their best judgment.

Shareholder Proposals

Any shareholder proposal submitted under Rule 14a-8 of the Exchange Act and intended for inclusion in the proxy materials for the Company’s 2027 annual meeting of shareholders must be submitted in writing to the Secretary of the Company on or before December 1, 2026 at Office of the Secretary, Ameren Corporation, P.O. Box 66149, Mail Code 1310, St. Louis, MO 63166-6149, or by email at corporate_secretary@ameren.com.

In addition, under the Company’s By-Laws, shareholders who intend to submit a proposal that will not be in the proxy statement but is to be considered at the 2027 annual meeting, or who intend to nominate a director at the 2027 annual meeting, must provide advance written notice along with other prescribed information. In general, such notice must be received by the Secretary of the Company at the principal executive offices of the Company not later than 60 days or earlier than 90 days prior to the anniversary of the previous year’s annual meeting (i.e., not later than March 15, 2027, or earlier than February 13, 2027). Subject to certain conditions, shareholders or a group of shareholders who have owned more than 5 percent of the Company’s common stock for at least one year may also recommend director nominees for nomination by the Nominating and Corporate Governance Committee provided that written notice from the shareholder(s) must be received by the Secretary of the Company at the principal executive offices of the Company not later than 120 days prior to the anniversary of the date the Company’s proxy statement was released to shareholders in connection with the previous year’s annual meeting (i.e., not later than December 1, 2026). As described under the section entitled “Board Practices, Policies and Processes” of this proxy statement, the Company has adopted a “proxy access” by-law. Under the Company’s By-Laws, shareholders who meet the requirements set forth in the Company’s By-Laws may nominate a person for election as a director and include such nominee in the Company’s proxy materials. The By-Laws require, among other things, that written notice from the shareholder(s) must be received by the Secretary of the Company at the principal executive offices of the Company not later than 120 days or earlier than 150 days prior to the anniversary of the date the Company’s proxy statement was released to shareholders in connection with the previous year’s annual meeting (i.e., not later than December 1, 2026, or earlier than November 1, 2026). The specific procedures to be used by shareholders to recommend nominees for director are set forth in the Company’s By-Laws and Director Nomination Policy. The specific procedures to be used by shareholders to submit a proposal in person at an annual meeting are set forth in the Company’s By-Laws. The chairman of the meeting may refuse to allow the transaction of any business, or to acknowledge the nomination of any person, not made in compliance with the procedures set forth in the Company’s By-Laws and, in the case of nominations, the Director Nomination Policy. Copies of the Company’s By-Laws and Director Nomination Policy may be obtained upon written request to the Secretary of the Company. Correspondence relating to the foregoing should be directed to the Office of the Secretary, Ameren Corporation, P.O. Box 66149, Mail Code 1310, St. Louis, MO 63166-6149.

Proxy Solicitation

In addition to the use of the mails, proxies may be solicited by personal interview, by telephone, or through the Internet or other means, and banks, brokers, nominees and other custodians and fiduciaries will be reimbursed for their reasonable out-of-pocket expenses in forwarding soliciting material to their principals, the beneficial owners of common stock. Proxies may be solicited by our directors, officers and key employees on a voluntary basis without compensation. We will bear the cost of soliciting proxies on our behalf. Furthermore, we have retained Alliance Advisors LLC, a proxy solicitation firm, to assist with the solicitation of proxies for the Annual Meeting at an anticipated cost to the Company of approximately $50,000, plus the reimbursement of reasonable out-of-pocket expenses.