Company: AWK
Filing Date: 2025-12-17
Form Type: S-4
Source: 0001193125-25-321389
Chunk: 231

Company: American Water Works Company, Inc.
Filing Date: 2025-12-17
Form: S-4
Chunk 231
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,973 Essential RSUs that will vest within 60 days of December 10, 2025. |

Security Ownership of Other Beneficial Owners The table below indicates the persons or entities known to Essential to be the beneficial holders of more than 5% of Essential common stock, as of the dates as indicated in the footnotes below, with percentages determined as of December 10, 2025.

| Name and Address of Beneficial Owner |     | Number of    
 Shares       
 Beneficially 
 Owned        |            |     | % of Shares    
 Outstanding(1) |      |   |
| BlackRock, Inc.(2)                   
 50 Hudson Yards                      
 New                                  
 York, NY 10001                       |     |              | 35,703,517 |     |                | 12.6 | % |
| The Vanguard Group(3)                
 100 Vanguard                         
 Boulevard                            
 Malvern, PA 19355                    |     |              | 27,988,993 |     |                |  9.9 | % |

| (1) | On December 10, 2025, there were 283,083,429 shares of Essential common stock issued and outstanding. |

| (2) | The information regarding BlackRock, Inc. was obtained from the Schedule 13G/A filed by BlackRock, Inc.                                                                                                                             
 with the SEC on October 17, 2025. This Schedule 13G/A disclosed that BlackRock, Inc. had sole voting power with respect to 33,667,375 shares of Essential common stock, sole dispositive power with respect to 35,703,517 shares of 
 Essential common stock, and shared voting power and shared dispositive power with respect to no shares of Essential common stock.                                                                                                   |

| (3) | The information regarding The Vanguard Group was obtained from the Schedule 13G/A filed by the Vanguard                                                                                                                 
 Group with the SEC on February 13, 2024. This Schedule 13G/A disclosed that The Vanguard Group had shared voting power with respect to 248,760 shares of Essential common stock, sole dispositive power with respect to 
 27,536,540 shares of Essential common stock, shared dispositive power with respect to 452,453 shares of Essential common stock, and sole voting power with respect to no shares of Essential common stock.              |

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DATES FOR SUBMISSION OF SHAREHOLDER PROPOSALS FOR 2026 ANNUAL MEETING American Water 2026