Company: AWK
Filing Date: 2025-12-17
Form Type: S-4
Source: 0001193125-25-321389
Chunk: 27

Company: American Water Works Company, Inc.
Filing Date: 2025-12-17
Form: S-4
Chunk 27
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 during the live webcast, follow the instructions available on the Essential special meeting website at www.virtualshareholdermeeting.com/WTRG2026SM. The Essential special meeting will be held exclusively online via live webcast. To be admitted to the live webcast, holders of record must provide their 16-digitcontrol number. It is recommended that holders of record submit their vote by proxy prior to the date of the Essential special meeting even if they plan to attend the meeting virtually via the Internet. 13

Beneficial Holders (in “Street Name”) If you hold your shares of Essential common stock in “street name” through an intermediary, you have the right to direct how your shares will be voted. You may vote by mail by completing, signing, and dating the voting instruction form provided by your intermediary and returning it in the accompanying pre-addressedenvelope. Your intermediary must receive your voting instruction form in sufficient time to vote your shares at the Essential special meeting. If you hold your shares of Essential common stock in “street name” through an intermediary, you may vote via the Internet or by telephone only if Internet or telephone voting is made available by your intermediary. Please follow the voting instructions provided by your intermediary with these materials. If you hold shares of Essential common stock in “street name” through an intermediary, you will receive separate voting instructions from your intermediary for voting during the live webcast. You must follow the voting instructions provided by your intermediary in order to instruct your intermediary on how to vote your shares of Essential common stock.

| Q: | If my shares of Essential common stock are held in “street name” by my intermediary, will my 
 intermediary vote my shares for me at the Essential 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 instructions 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-routinematters unless they have received voting instructions from their customers. In such cases, the uninstructed shares for