Company: AWK
Filing Date: 2025-12-29
Form Type: S-4/A
Source: 0001193125-25-332292
Chunk: 404

Company: American Water Works Company, Inc.
Filing Date: 2025-12-29
Form: S-4/A
Chunk 404
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 legislators with approval of the Parent CEO.                                    |

| iii. | The Executive Vice Chair shall act as executive sponsor and shall oversee the Integration Task Force. |

| d. | Reporting and Role |

| i. | The Executive Vice Chair shall report to the Parent Board. |

| ii. | In general, the Executive Vice Chair primarily would interface with: (i) the Parent Board with respect to                                                
 matters included in Section 5(a) of this Exhibit C and (ii) the Parent CEO with respect to matters included in Sections 5(b) and 5(c) of this Exhibit C. |

| iii. | It is intended that the Executive Vice Chair shall continue to serve as a director of the Parent Board after                            
 the initial two-year Executive Vice Chair assignment is completed. This is subject to the Parent Board governance and election process. |

| 6. | Integration Task Force. As of the Effective Time, Parent shall establish an Integration Task Force,                                                                                                                                        
 which shall be comprised of a group of managers with equal representations from both Parties. The Integration Task Force shall evaluate and recommend the “best-in-breed” individuals, other than as                                       
 described in the Agreement and organizational structures for Parent post-closing. The Integration Task Force shall operate for one (1) year after Closing, at which time it shall be dissolved, and all future decisions on management and 
 organization shall be under the responsibility of the Parent CEO and his management team, with the exception of Named Executive Officers, which would continue to be recommended by the Parent CEO and approved by the Parent Board.       |

A-100

Exhibit D

Post-Closing Executive Officer Matters

Parent shall take all necessary action such that, as of the Effective Time, (i) Colleen Arnold shall hold a senior executive-level position with Parent
as President, Regulated Operations, and (ii) Daniel Schuller shall hold a senior executive-level position with Parent as Executive Vice President and Chief Strategy Officer (each individual, an “”), in each
case subject to compliance by such Officer Designee with Parent’s typical procedures with respect to new senior executives and subject to such Officer Designee’s ability and willingness to serve.

A-101

Annex B October 24, 2025 The Board of Directors American Water Works Company, Inc. 1 Water Street Camden, NJ 08102 Members of the Board of Directors: We understand that American Water Works Company, Inc. (“American Water”) proposes to enter into an Agreement and Plan of Merger (the