Company: AWK
Filing Date: 2025-10-27
Form Type: 425
Source: 0001193125-25-250691
Chunk: 1

Company: American Water Works Company, Inc.
Filing Date: 2025-10-27
Form: 425
Chunk 1
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 for shareholders.          |

| • |     | There will be no change in customer rates as a result of the merger, and American Water and Essential Utilities                                                                                      
 will be better able to maintain an average customer water bill that is affordable, supporting the economic prosperity of the more than 2,000 communities in which the combined company will operate. |

3. Who is Essential Utilities?

| • |     | Essential Utilities is one of the largest regulated water, wastewater and natural gas providers in the U.S. |

| • |     | Throughout Essential’s nearly 140-year history, it has consistently                                                              
 led with purpose to shape a future rooted in sustainability, innovation, resilience and best-in-class service for its customers. |

| • |     | Essential Utilities serves approximately 1.9 million connections across nine states under the Aqua Water and                                                                                       
 Peoples Gas brands. Their infrastructure makes them uniquely positioned to have an impact on improving reliability, quality of life and economic prosperity in the communities where they operate. |

| • |     | Essential’s values are closely aligned with ours. They are committed to safety, sustainable growth,                                                                                                       
 operational excellence, superior customer experience and recognition as a top-tier employer, all while delivering safe, clean, reliable and affordable services in the communities in which they operate. |

4. How do the cultures of American Water and Essential Utilities compare?

| • |     | Both American Water and Essential Utilities are outstanding companies, with closely aligned values centered on                                                                                                  
 safety, growth, operational excellence, excellent customer experience and recognition as a top-tier employer, all while delivering safe, clean, reliable and affordable services in the communities in which we 
 operate.                                                                                                                                                                                                        |

| • |     | We look forward to bringing our skilled workforces together. |

5. How will this announcement affect my day-to-day?What does the merger mean for me?

| • |     | Between now and closing, which we expect will occur by the end of the first quarter of 2027, American Water and 
 Essential Utilities will continue to operate as separate, independent companies and it is business as usual.    |

| • |     | During this period, roles, responsibilities and priorities will largely remain the same. Some employees will be                                                                               
 asked to participate in integration planning activities. Otherwise, we should stay focused on providing safe, clean, reliable and affordable water and wastewater services for our customers. |

| • |     | Following closing of the transaction, we believe we will be better positioned as a combined company, which