Company: AWK
Filing Date: 2025-12-29
Form Type: S-4/A
Source: 0001193125-25-332292
Chunk: 19

Company: American Water Works Company, Inc.
Filing Date: 2025-12-29
Form: S-4/A
Chunk 19
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 If your shares of American Water common stock are held in “street name” and you want to vote on the share issuance proposal or the American Water adjournment proposal, you MUST indicate how you wish your shares to be voted. The intermediary will vote shares held by you in “street name” in accordance with your 8

voting instructions, as indicated on your signed voting instruction form or by the instructions you provide via the Internet or by telephone. Absent such instructions, NYSE rules prohibit an intermediary from exercising discretion to cast a vote with respect to your shares. In that case, a proxy submitted by the intermediary with respect to your shares would indicate that the intermediary is unable to cast a vote with respect to the matter, which is commonly referred to as a “broker non-vote.” If you received more than one voting instruction form, your shares of American Water common stock are likely registered in different names or with different addresses or are in more than one account. You must separately follow the foregoing voting procedures for each voting instruction form that you receive in order for all of your shares to be voted at the meeting. If you hold shares of American Water common stock in “street name” and wish to vote your shares virtually at the meeting, you may vote online during the meeting as an authenticated shareholder by visiting www.virtualshareholdermeeting.com/AWK2026SM, entering your 16-digitcontrol number, and following the on-screeninstructions. The availability of online voting may depend on your intermediary’s specific voting procedures. Please contact your intermediary for information.

| Q: | If my shares of American Water common stock are held in “street name” by an intermediary, will 
 my intermediary vote my shares for me at the American Water special meeting?                   |

| A: | No. If your shares are held in “street name” in a stock brokerage account or by an intermediary,                                                                                                                                              
 you must provide the record holder of your shares with instructions on how to vote your shares. If you do not provide instruction to the record holder, your shares will not be voted. Please follow the voting instructions provided by your 
 intermediary.                                                                                                                                                                                                                                 |

Applicable stock exchange rules permit intermediaries to vote their customers’ stock held in “street name” on routine matters when the intermediaries have not received voting instructions from their customers. Those rules do not, however, allow intermediaries to vote their customers’ stock held in “street name” on non-routine matters unless they have received voting instructions from their customers. In such cases, the uninstruct