Company: AWK
Filing Date: 2025-10-27
Form Type: 425
Source: 0001193125-25-250691
Chunk: 0

Company: American Water Works Company, Inc.
Filing Date: 2025-10-27
Form: 425
Chunk 0
---
Filed by American Water Works Company, Inc. pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: Essential Utilities, Inc. Commission File No.: 001-06659 Date: October 27, 2025 The following communication regarding the merger between American Water Works Company, Inc. and Essential Utilities, Inc. was sent to employees of American Water Works Company, Inc. on October 27, 2025. 1. What was announced?

| • |     | We announced that American Water and Essential Utilities have entered into an agreement to combine in an all-stock, tax-free merger. |

| • |     | The combined company will serve 4.7 million water and wastewater connections across 17 states and on 18 
 military installations.                                                                                 |

| • |     | The combined company’s expanded set of resources will strengthen its ability to solve water and wastewater 
 challenges and bring customer-centric capabilities to existing and new customers and communities.          |

| • |     | Its enhanced scale will support continued investment in critical infrastructure, enabling the combined company to 
 continue providing superior customer service at affordable rates.                                                 |

| • |     | The transaction is expected to close by the end of the first quarter of 2027, subject to customary closing 
 conditions and approvals.                                                                                  |

| • |     | The combination will offer benefits for all our stakeholders, including our customers, employees, shareholders 
 and the communities we serve.                                                                                  |

| • |     | We look forward to bringing our two highly complementary companies together and to leveraging nearly 300 years of 
 collective experience to provide safe, clean, reliable and affordable services to our customers.                  |

2. Why are American Water and Essential Utilities merging?

| • |     | For nearly 140 years, both American Water and Essential have provided life’s most critical need with a      
 focus on safety, trust, environmental leadership, innovation, affordability, teamwork and high performance. |

| • |     | This combination is the next milestone in our journey. |

| • |     | As a leading regulated U.S. water and wastewater utility, together we will have an enhanced ability to deliver 
 safe, clean, reliable and affordable water and wastewater services to existing and future customers.           |

| • |     | We will be positioned to help solve water and wastewater challenges and continue to safely and reliably support 
 customers and communities, creating opportunities for employees and delivering value