Company: AWK
Filing Date: 2025-03-27
Form Type: DEF 14A
Source: 0001193125-25-064607
Chunk: 11

Company: American Water Works Company, Inc.
Filing Date: 2025-03-27
Form: DEF 14A
Chunk 11
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 date, 195,010,945 shares of our common stock were outstanding. Each outstanding share of common stock entitles the holder of record to one vote on each matter submitted to the vote of shareholders at the meeting. Holders of our unvested restricted stock units, or RSUs, and unvested performance stock units, or PSUs, as well as holders of awards as to which the receipt of underlying common stock has been deferred, are not entitled to vote any shares of common stock underlying those awards at the meeting. Under our Amended and Restated Bylaws, the holders of a majority of the outstanding shares of our common stock at the close of business on the record date must be present at the meeting, either virtually or by proxy, to constitute a quorum and to transact business at the meeting. Abstentions and broker non-votesare included in the determination of shares present at the meeting for quorum purposes. See “—How to Vote Shares Held in Street Name” on page 4 of this proxy statement for more information on “broker non-votes.” SHAREHOLDER LIST If you are a shareholder of record, and you wish to examine the list of shareholders during the 10-dayperiod preceding the annual meeting, please email your full legal name, address and daytime telephone number and a request to examine the shareholder list, to our Secretary at contacttheboard@amwater.com. You will be contacted by telephone or email to arrange for you to access the list.

| 2 |     | AMERICAN WATER | 2025 PROXY STATEMENT |

MATTERS TO BE VOTED ON AT THE ANNUAL MEETING The following table describes the items to be brought for a vote of our shareholders at the meeting, the vote required for adoption of each proposal, the treatment of abstentions and broker non-votesfor each matter, and the Board’s voting recommendation as to each matter: HOW TO VOTE SHARES REGISTERED IN YOUR OWN NAME If you own shares that are registered on our books and records in your own name, you can vote your shares in any of the following ways: The internet and telephone voting for shareholders of record will close at 11:59 p.m., Eastern Time, on Tuesday, May 13, 2025. Your signed proxy card, or the proxy you grant via the Internet or by telephone, will be voted in accordance with your instructions. If you return a signed proxy card or grant a proxy via the Internet or by telephone, but

do not indicate how you