American Water Works Company, Inc.

With a history dating back to 1886, American Water is the largest and most geographically diverse, publicly-traded water and wastewater utility company in the United States, as measured by both operating revenues and population served. A holding company originally incorporated in Delaware in 1936, the Company employs approximately 7,000 professionals who provide drinking water, wastewater and other related services to approximately 14 million people in 24 states. The Company conducts the majority of its business through regulated utilities that provide water and wastewater services, collectively presented as one reportable segment, referred to as the Regulated Businesses. The Company also operates other businesses that provide water and wastewater services to the U.S. government on military installations, as well as municipalities. Individually, these other businesses do not meet the criteria of a reportable segment in accordance with generally accepted accounting principles in the United States ( GAAP ), and are collectively presented throughout this Annual Report on Form 10-K within Other, which is consistent with how management assesses the results of these businesses. On October 26, 2025, parent company entered into an Agreement and Plan of Merger (the Essential Merger Agreement ) with Essential to combine the two companies in a stock-for-stock transaction.