Company: AWK
Filing Date: 2025-02-27
Form Type: S-3ASR
Source: 0001410636-25-000050
Chunk: 5

Company: American Water Works Company, Inc.
Filing Date: 2025-02-27
Form: S-3ASR
Chunk 5
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 the date of this Prospectus. These risks could materially affect American Water’s business, results of operations or financial condition and could cause the value of American Water’s common stock to decline. You could lose all or part of your investment.

### HOW THE PLAN WORKS

#### 1. Who is eligible to participate in the Plan?
All U.S. citizens are eligible to participate in the Plan, whether or not they are currently shareholders of American Water. If you are not a U.S. citizen, you may participate in the Plan, provided there are not any laws or government regulations that would prohibit you from participating or affect the terms of the Plan. American Water and Equiniti reserve the right to deny or terminate participation of any person if American Water or Equiniti deem it advisable under any laws or regulations. American Water and Equiniti each also reserve the right, in its sole discretion, to deny, suspend or terminate participation by a Plan participant who is using the Plan for purposes inconsistent with the intended terms or limitations of, or purpose of the Plan, or the plan of distribution as set forth herein.

#### 2. How do I enroll in the Plan?
To enroll in the Plan, you must be a registered owner of American Water common stock, or you may become a registered owner by buying a minimum of $100.00 in common stock through the Plan and enrolling that stock in the Plan at the same time. Both methods of enrollment are described below.

• If you are a registered owner (which means that you already own one or more shares of American Water common stock in your name), but do not currently participate in the Plan, you must complete an enrollment form. Mail the form to Equiniti at the address designated for transaction processing provided in Question 3. You can request an enrollment form by telephoning Equiniti at 1-888-556-0423. Yo u also may enroll online at us.astfinancial.com/InvestOnline/Invest/AllPlan. You will need to create and enter a unique user identification and password if you wish to view your account online. If you own American Water common stock through another name (for example, in a broker, bank, trust or other nominee name), you can arrange with the nominee to transfer some or all of your shares of

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American Water common stock into your name, and then enroll the shares using these instructions. If you do not wish to transfer shares held in nominee name, you can buy additional shares