American Electric Power Company, Inc.

1 Riverside Plaza

Columbus, Ohio 43215

(614) 716-1000

SUPPLEMENT TO PROXY STATEMENT FOR THE ANNUAL MEETING OF SHAREHOLDERS

TO BE HELD ON APRIL 23, 2024

To the Shareholders of American Electric Power Company, Inc.:

This proxy statement supplement, dated March 19, 2024 (this "Supplement"), supplements the Definitive Proxy Statement on Schedule 14A of American Electric Power Company, Inc. (the "Company"), dated March 13, 2024 (the "Proxy Statement"), for the Company's Annual Meeting of Shareholders to be held on April 23, 2024 (the "Annual Meeting").

The Company is supplementing the Proxy Statement to clarify the voting standard applicable to Item 4 described therein, which relates to the approval of the American Electric Power System 2024 Long-Term Incentive Plan. The voting standard for Item 4 is set forth on page 3 and page 47 of the Proxy Statement.

To avoid any potential ambiguity, the Proxy Statement is hereby supplemented such that the following text replaces, in its entirety, the first paragraph under the heading "Vote Required" on page 47 of the Proxy Statement:

"Approval of this proposal requires the affirmative vote of the holders of a majority of the shares voted in person or by proxy at the Annual Meeting. Abstentions and broker non-votes will not affect the outcome of the vote on Item 4."

THIS SUPPLEMENT SHOULD BE READ IN CONJUNCTION WITH THE PROXY STATEMENT.

EXCEPT AS SPECIFICALLY SUPPLEMENTED BY THE INFORMATION CONTAINED HEREIN, THIS SUPPLEMENT DOES NOT MODIFY ANY OTHER INFORMATION SET FORTH IN THE PROXY STATEMENT OR

THE PROXY CARD AND THEY CONTINUE TO BE IN FULL FORCE AND EFFECT AS ORIGINALLY FILED.

Please note that any proxy card that you received has not changed and may still be used to vote your shares in connection with the Annual Meeting. If you have already submitted your vote, you do not need to take any further action. Information on how to vote your shares and how to change your vote or revoke your proxy is contained in the Proxy Statement. The Company urges shareholders to vote their shares prior to the Annual Meeting by using one of the methods described in the Proxy Statement.

By Order of the Board of Directors,

David M. Feinberg

Executive Vice President and Secretary

March 19, 2024

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AEP - American Electric Power Company Inc. published this content on 28 March 2024 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 28 March 2024 20:39:09 UTC.