Company: AWK
Filing Date: 2025-12-29
Form Type: S-4/A
Source: 0001193125-25-332292
Chunk: 27

Company: American Water Works Company, Inc.
Filing Date: 2025-12-29
Form: S-4/A
Chunk 27
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 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 which the intermediary is unable to vote are called “broker non-votes.”It is expected that all proposals to be voted on at the Essential special meeting are non-routinematters on which intermediaries are not allowed to vote unless they have received voting instructions from their customers. Please note that you may not vote shares held in “street name” by returning a proxy card or voting instruction form directly to Essential. Your intermediary is obligated to provide you with a voting instruction form for you to use.

| Q: | How can I revoke or change my vote at the Essential special meeting? |

For shares you hold in “street name,” you may change your vote by timely submitting new voting instructions to your intermediary, or, if you have obtained a legal proxy from your intermediary giving you the right to vote your shares, by joining the Essential special meeting virtually via the Internet and voting during the Essential special meeting. 14

| Q: | Will a proxy solicitor be used by Essential in connection with the Essential special meeting? |

| A: | Yes. Essential has engaged MacKenzie Partners, Inc. to assist in the solicitation of proxies for the Essential                                                                                                                                       
 special meeting, and Essential has agreed to pay them a fee of $17,500, plus $1,500 for any adjournment or postponement of the Essential special meeting. Essential has also agreed to pay the cost of any additional services provided at customary 
 rates, and to reimburse the reasonable and customary expenses of MacKenzie Partners, Inc. incurred in connection with the solicitation.                                                                                                              |

| Q: | How can I vote the shares of Essential that I hold through Essential’s dividend reinvestment and 
 direct stock purchase plan?                                                                      |

| A: | Participants in Essential’s dividend reinvestment and direct stock purchase plan will receive the same 
 materials as a holder of record and should follow the voting instructions summarized above.            |

| Q: | Will Essential be required to submit the merger agreement proposal to Essential shareholders even if the 
 Essential board has withdrawn, modified, or qualified its recommendation?                                |