American Water Works (AWK) S-3ASRAutomatic shelf registration

The securities covered by this prospectus may be sold by American Water Works Company, Inc., or American Water, from time to time, independently or together with American Water Capital Corp., or AWCC, a wholly-owned subsidiary of American Water Works Company, Inc. Any debt securities issued by AWCC will have the benefit of a support agreement from American Water. In addition, selling security holders who may be named in a prospectus supplement may offer and sell from time to time securities in such amounts as set forth in such prospectus supplement. We may, and any selling security holder may, offer the securities independently or together in any combination for sale directly to purchasers or through underwriters, dealers or agents to be designated at a future date. We may, and any selling security holder may, offer and sell these securities in amounts, at prices and on terms determined at the time of the offering. Unless otherwise set forth in a prospectus supplement, we will not receive any proceeds from the sale of securities by any selling security holders.

When we offer securities, a prospectus supplement will describe the specific terms of the specific issue of securities. Prospectus supplements may also add, update or change the information in this prospectus. You should carefully read this prospectus and the prospectus supplement relating to the specific issue of securities, together with the documents incorporated by reference, before you decide to invest in any of these securities.

American Water Works Company, Inc. common stock is listed on the New York Stock Exchange under the symbol “AWK.” The mailing address of our principal executive offices is 1 Water Street, Camden, New Jersey 08102-1658, and the telephone number is (856) 955-4001.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or passed upon the adequacy or accuracy of this prospectus. Any representation to the contrary is a criminal offense.

An investment in our securities involves risk. Before you invest in securities issued by us, you should carefully consider the risks involved. Accordingly, you should carefully consider:

The discussion of risks related to our business contained in or incorporated by reference into this prospectus or into any prospectus supplement comprises material risks of which American Water or AWCC is aware. If any of the events or developments described actually occurs, our business, financial condition or results of operations would likely suffer.

You should also be aware that new risks may emerge in the future at any time, and we cannot predict such risks or estimate the extent to which they may affect our business, financial condition or results of operations. The prospectus supplement applicable to each type or series of securities we offer may contain a discussion of additional risks applicable to an investment in us and the particular type of securities we are offering under that prospectus supplement.

This prospectus is part of a registration statement that American Water and AWCC filed with the Securities and Exchange Commission, or the SEC, using a “shelf” registration process. Under this shelf registration process, we, or certain of our security holders, may sell the securities described in this prospectus in one or more offerings from time to time. Each time we, or, under certain circumstances, certain of our security holders, sell securities under this shelf registration, we will provide a prospectus supplement that will contain specific information about the terms of the offering. The prospectus supplement may also add to, modify or supersede the information contained in this prospectus. You should read both this prospectus and the applicable prospectus supplement together with the additional information referred to under “Where You Can Find More Information.” If there is any inconsistency between the information in the prospectus and the prospectus supplement, you should rely on the information in the prospectus supplement.

The prospectus supplement will describe: the terms of the securities offered, any initial public offering price, any price paid to us for the securities, the net proceeds to us, if any, the manner of distribution and any underwriting compensation and the other specific material terms related to the offering of the applicable securities. For more detail on the terms of the securities, you should read the exhibits filed with or incorporated by reference in our registration statement of which this prospectus forms a part.

The term “American Water” refers to American Water Works Company, Inc. The term “AWCC” refers to American Water Capital Corp. All references in this prospectus to “we,” “our” and “us” generally refer to:

References to “securities” include any security that we or our security holders might sell under this prospectus or any prospectus supplement.

This prospectus contains summaries of certain provisions contained in some of the documents described herein. Please refer to the actual documents for complete information. All of the summaries are qualified in their entirety by reference to the actual documents. Copies of the documents referred to herein have been filed, or will be filed or incorporated by reference as exhibits to the registration statement of which this prospectus is a part, and you may obtain copies of those documents as described under “Where You Can Find More Information.”

This prospectus and any prospectus supplement, the documents incorporated by reference or any other written or oral statements made by or on behalf of us may include statements that reflect current views with respect to future events. These statements are “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended, which is referred to as the “Securities Act,” Section 21E of the Securities Exchange Act of 1934, as amended, which is referred to as the “Exchange Act,” and the Private Securities Litigation Reform Act of 1995. In some cases, these forward-looking statements can be identified by words with prospective meanings such as “intend,” “plan,” “estimate,” “believe,” “anticipate,” “expect,” “predict,” “project,” “propose,” “assume,” “forecast,” “likely,” “uncertain,” “outlook,” “future,” “pending,” “goal,” “objective,” “potential,” “continue,” “seek to,” “may,” “can,” “should,” “will” and “could” or the negative of such terms or other variations or similar expressions.

Forward-looking statements are predictions based on our current expectations and assumptions regarding future events. Accordingly, these forward-looking statements are qualified by, and should be read together with, the risk factors and other cautionary statements contained in American Water’s Annual Report on Form 10-K for the year ended December 31, 2023, and its other filings with the SEC, which are incorporated by reference into this prospectus, and you should refer to such risks, uncertainties and risk factors in evaluating such forward-looking statements. Any forward-looking statements we make speak only as of the date of the document in which they are contained. Except as required by the federal securities laws, we do not have any obligation, and we specifically disclaim any undertaking or intention, to publicly update or revise any forward-looking statements, whether as a result of new information, future events, changed circumstances or otherwise. New factors emerge from time to time, and it is not possible for us to predict all such factors. Furthermore, it may not be possible to assess the impact of any such factor on our businesses, either viewed independently or together, or the extent to which any factor, or combination of factors, may cause results to differ materially from those contained in any forward-looking statement. The foregoing factors should not be construed as exhaustive.

We are 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. As a holding company, American Water conducts substantially all of its business operations through its subsidiaries. We employ approximately 6,500 employees to provide an estimated 14 million people with drinking water, wastewater and other water-related services in 24 states.

American Water’s principal executive offices are located at 1 Water Street, Camden, New Jersey 08102-1658 and its telephone number is (856) 955-4001.

American Water’s financing activities include, among other things, the issuance of long-term and short-term debt, primarily through AWCC, its wholly owned finance subsidiary. AWCC has no significant assets or operations other than as associated with these financing activities. AWCC loans all of the net proceeds of its long-term debt financings to American Water’s operating subsidiaries in its Regulated Businesses segment, as well as to American Water. AWCC also provides liquidity to the Regulated Businesses segment and American Water through AWCC’s revolving credit facility and commercial paper program. AWCC may also perform, provide or assist in providing other ancillary services directly related to these financing activities, including cash management activities and hedging of interest-rate and other market risk exposures associated with its indebtedness. The proceeds of all of AWCC’s long-term debt have been loaned to subsidiaries in American Water’s Regulated Businesses segment and American Water, which debt is evidenced by promissory notes issued to AWCC by such subsidiaries and American Water, as applicable.

AWCC’s principal executive offices are located at 1 Water Street, Camden, New Jersey 08102-1658 and its telephone number is (856) 955-4001.

Unless otherwise set forth in a prospectus supplement, the net proceeds from the sale of AWCC debt securities will be used to repay certain of AWCC’s outstanding indebtedness or loaned to American Water and/or the subsidiaries in its Regulated Businesses segment, and American Water and/or such subsidiaries may use the proceeds of such loans, and American Water may use the net proceeds from the sale of securities issued by American Water, for the following purposes:

Unless otherwise set forth in a prospectus supplement, we will not receive any proceeds from any sales of securities by any selling security holder who may be named in a prospectus supplement.

We may register securities covered by this prospectus for re-offer and resale by any selling security holder who may be named in a prospectus supplement. We may add secondary sales of securities by any selling security holder by filing a prospectus supplement with the SEC. We may register these securities to permit selling security holders to resell their securities when they deem appropriate. A selling security holder may resell all, a portion or none of their securities at any time and from time to time. We may register reoffers and resales of those securities through an underwriter or other plan of distribution as set forth in a prospectus supplement. See “Plan of Distribution.”

Selling security holders may also sell, transfer or otherwise dispose of some or all of their securities in transactions exempt from the registration requirements of the Securities Act. We may pay all expenses incurred with respect to the registration of the securities owned by the selling security holders, other than underwriting fees, discounts or commissions, which will be borne by the selling security holders. A prospectus supplement may name the selling security holders and specify the amount of securities to be registered and sold and any other terms of the securities that may be sold by a selling security holder. The applicable prospectus supplement will also disclose whether any of the selling security holders has held any position or office with, has been employed by or otherwise has had a material relationship with us during the three years prior to the date of the applicable prospectus supplement.

American Water’s authorized capital stock consists of 500,000,000 shares of common stock, par value $0.01 per share, and 50,000,000 shares of preferred stock. As of February 6, 2024, there were 194,755,320 shares of common stock outstanding and no shares of preferred stock outstanding.

Holders of common stock will share equally in any dividend declared by American Water’s board of directors, subject to the rights of the holders of any outstanding preferred stock.

In the event of any voluntary or involuntary liquidation, dissolution or winding up of American Water’s affairs, holders of American Water’s common stock would be entitled, after payment of the liquidation preference to all holders of any outstanding preferred stock, to share ratably in American Water’s assets that are legally available for distribution to shareholders after payment of liabilities. American Water must pay the applicable distribution to any holders of its preferred stock before it may pay distributions to the holders of its common stock.

American Water’s shareholders have no preemptive or other rights to subscribe for additional shares.

American Water’s board of directors may authorize the issuance of preferred stock from time to time in one or more series, without shareholder approval. Subject to the limits imposed by the DGCL, the board of directors is authorized to fix for any series of preferred stock the number of shares of such series and the voting powers (if any), designation, preferences and relative, participating, optional or other special rights, and qualifications, limitations or restrictions of such series. American Water’s board of directors is also authorized to increase or decrease the number of shares of any series, but not below the number of shares of that series then outstanding, without any further vote or action by American Water’s shareholders.

The following provisions of American Water’s certificate of incorporation and bylaws could deter, delay or prevent a third party from acquiring American Water, even if doing so would benefit American Water’s shareholders.

The ability to authorize undesignated preferred stock makes it possible for American Water’s board of directors to authorize the issuance of preferred stock with super voting, special approval, dividend or other rights or preferences on a discriminatory basis that could impede the success of any attempt to acquire American Water. These and other provisions may have the effect of deferring, delaying or discouraging hostile takeovers, or changes in control or management of American Water.

American Water’s bylaws establish advance notice procedures with respect to shareholder proposals for annual meetings and the nomination of candidates for election as directors, other than nominations made by or at the direction of American Water’s board of directors or a committee of the board of directors. A shareholder who wishes to bring a matter before a meeting or submit candidates for nomination as directors must comply with American Water’s advance notice requirements and

As permitted by Section 228 of the DGCL, American Water’s certificate of incorporation states that any action required or permitted to be taken by American Water’s shareholders must be effected at a duly called annual or special meeting of American Water’s shareholders and may not be effected by consent in writing by such shareholders.

A significant number of American Water’s regulated subsidiaries are subject to economic regulation by state public utility commissions. Some of these states have enacted laws that require regulatory approval for the acquisition of “control” of any regulated utility. In those states, obtaining “control” of the parent or any other company that controls a regulated utility also requires prior regulatory approval. The threshold for a change in control is a fact-specific inquiry that varies by state. For example, in some states, a presumption of control will arise when an acquiring party acquires more than 9.9% of the voting securities of the regulated utility or the controlling entity. In addition to ownership, other states may analyze the degree of influence or control an acquiror may exert over American Water. Any person acquiring American Water’s common stock in an offering or in any other purchase of American Water’s common stock in an amount sufficient to trigger a change in control under state law would need the prior approval of the applicable state public utility commission.

American Water’s certificate of incorporation provides that the number of directors is fixed in the manner provided in American Water’s bylaws. American Water’s bylaws provide that the number of directors will be fixed from time to time by American Water’s board of directors.

The DGCL authorizes corporations to limit or eliminate the personal liability of directors and officers to corporations and their shareholders for monetary damages for breaches of directors’ fiduciary duties. American Water’s certificate of incorporation includes a provision that eliminates the personal liability of directors (but not officers) for monetary damages for actions taken as a director to the fullest extent authorized by the DGCL. The DGCL does not permit exculpation for liability:

Equiniti Trust Company, LLC serves as the registrar and transfer agent for American Water’s common stock.

American Water’s common stock is listed on the New York Stock Exchange under the trading symbol “AWK.”

The following discussion of certain provisions of the indenture is a summary only and should not be considered a complete description of the terms and provisions of the indenture. Accordingly, the following discussion is qualified in its entirety by reference to the provisions of the indenture, including the definition of certain terms used below.

The debt securities represent direct, unsecured, general obligations of AWCC and:

The aggregate principal amount of debt securities that AWCC may authenticate and deliver under the indenture is unlimited. The debt securities may be issued in one or more series as may be authorized from time to time. We will include some or all of the following information about a particular series of debt securities in a prospectus supplement relating to that particular series of debt securities:

All debt securities of one series need not be issued at the same time, and a series may be re‑opened for issuances of additional debt securities of such series. This means that AWCC may from time to time, without notice to, or without the consent of any existing holders of the previously-issued debt securities of a particular series, create and issue additional debt securities of such series. Such additional debt securities will have the same terms as the previously‑issued debt securities of such series in all respects except for the issue date and, if applicable, the initial interest payment date. The additional debt securities will be consolidated and form a single series with the previously‑issued debt securities of such series.

AWCC’s indebtedness (including debt securities) has the benefit of the support agreement. The support agreement, which, under the circumstances described below, is the functional equivalent of a guarantee, provides, among other things, that:

No amendment to the support agreement that adversely affects the rights of any lender (including any holder of debt securities) and no termination of the support agreement will be effective until such time as all indebtedness of AWCC shall have been irrevocably paid in full and all commitments for indebtedness have been terminated, unless the lenders (including holders of debt securities or the trustee acting on behalf of debt security holders) holding all of the aggregate principal amount of debt outstanding and (to the extent not outstanding) committed to consent in writing thereto. Notwithstanding the foregoing sentence, any amendment to the support agreement for the purposes of (i) increasing the minimum net worth as provided in the support agreement, (ii) establishing or increasing a minimum interest coverage ratio, (iii) establishing or reducing a maximum amount of debt leverage, (iv) increasing the aggregate principal amount of debt outstanding whose holders are required to consent to the termination or amendment of the support agreement, or (v) any combination of clauses (i), (ii), (iii) and (iv) of this sentence, shall be effective without the consent of any lender (including any holder of debt securities or trustee acting on behalf of such holder). In addition, nothing in the prior two sentences shall derogate from, or override, any provision in an instrument, indenture, agreement or other document pursuant to which indebtedness is or will be issued that requires the written consent of the holders of a specified amount or percentage of that indebtedness to consent to an amendment or termination of the support agreement.

Unless otherwise provided in the prospectus supplement for a particular series of debt securities, the indenture, as supplemented for a particular series of debt securities, will contain the following covenants for the benefit of the holders of such series of debt securities, which will be applicable (unless waived or amended) so long as any of the debt securities of such series are outstanding:

AWCC will not, and will not allow American Water, as the support provider, or any of its subsidiaries, as defined below, to, create, incur, issue or assume any liens, as defined below, on American Water’s or its subsidiaries’ respective property to secure debt, as defined below, where the debt secured by those liens would exceed an amount equal to 15% of our consolidated tangible total assets, as defined below (calculated to exclude debt secured by permitted liens). This restriction does not apply to the following permitted liens:

“Debt” means, for any person (without duplication), all (i) indebtedness for borrowed money, (ii) obligations evidenced by bonds, debentures, notes or other similar instruments, (iii) obligations to pay the deferred purchase price of property or service (other than trade payables not overdue by more than 90 days incurred in the ordinary course of business and long term water purchase contracts), (iv) obligations under capital leases, (v) indebtedness of the type referred to in clauses (i) through (iv) above secured by (or for which the holder of such indebtedness has an existing right, contingent or otherwise, to be secured by), any lien or encumbrance on, or security interest in, property (including, without limitation, accounts and contract rights) owned by such person, even though such person has not assumed or become liable for the payment of such indebtedness, and (vi) all obligations of such person for indebtedness or obligations of others of the kinds referred to in clauses (i) through (iv) above under direct or indirect guarantees, excluding, in all cases, (i) advances for construction and contributions in aid of construction as set forth on the consolidated balance sheet of American Water and its subsidiaries, (ii) reimbursement obligations (contingent or otherwise) in respect of outstanding letters of credit and (iii) attributable debt in respect of sale and leaseback transactions, as defined below.

“Subsidiary” means a corporation more than 50% of the outstanding voting stock of which is owned, directly or indirectly, by American Water or by one or more other subsidiaries, or by American Water and one or more other subsidiaries.

AWCC will not, and will not allow American Water or any of its subsidiaries to, enter into any sale and leaseback transaction without effectively providing that the debt securities will be secured equally and ratably with or prior to the sale and leaseback transaction, unless:

A “sale and leaseback transaction” is an arrangement between AWCC, American Water or any of its subsidiaries and a bank, insurance company or other lender or investor where AWCC, American Water or any of its subsidiaries leases property for an initial term of three years or more that was or will be sold by AWCC, American Water, or such subsidiary to that lender or investor for a sale price of $1 million or its equivalent or more.

“Attributable debt” means the lesser of (1) the fair market value of the asset subject to the sale and leaseback transaction and (2) the present value, determined in accordance with GAAP (discounted at a rate equal to the rate of interest implicit in such transaction), of the obligations of the lessee for the net rental payments (excluding amounts on account of maintenance and repairs, insurance, taxes, assessments and similar charges and contingent rents) during the term of the lease.

“Consolidated tangible total assets” means, as at any applicable time of determination, consolidated total assets less, without duplication, all intangible assets such as goodwill, trademarks, trade names, patents and unamortized debt discount and expense carried as an asset, in each case as set forth in American Water’s most recent consolidated balance sheet.

“Consolidated total assets” means, as at any applicable time of determination, the consolidated total assets of American Water and its subsidiaries as set forth in American Water’s most recent consolidated financial statements.

Neither AWCC nor American Water will consolidate with or merge into any other person or convey, transfer or lease its properties and assets substantially as an entirety to any person, unless:

Upon any consolidation by AWCC or American Water with or merger by AWCC or American Water into any other person or any conveyance, transfer or lease of either AWCC’s or American Water’s properties and assets substantially as an entirety in accordance with this covenant, the successor person formed by such consolidation or into which it is merged or to which such conveyance, transfer or lease is made will succeed to, and be substituted for, and may exercise every right and power of, AWCC or American Water, as applicable, under the indenture and the support agreement with the same effect as if such successor person had been named as AWCC or American Water, as applicable, therein, and thereafter, except in the case of a lease, the predecessor person will be relieved of all obligations and covenants, in the case of AWCC under the indenture, the debt securities and, in the case of American Water, under the support agreement.

American Water may not (a) cancel or terminate the support agreement or (b) amend or otherwise modify the terms of the support agreement, except in accordance with the support agreement. See “Support Agreement.”

A series of debt securities may be subordinated, which are referred to as “subordinated debt securities,” to senior indebtedness (as would be defined in the applicable prospectus supplement) to the extent set forth in the prospectus supplement relating thereto. To the extent American Water conducts its operations through subsidiaries, the holders of debt securities (whether or not subordinated debt securities) will be structurally subordinated to the creditors of American Water’s subsidiaries with respect to American Water’s obligations under the support agreement, except to the extent such subsidiary is a guarantor of such series of debt securities.

Each of the following constitutes an event of default under the indenture with respect to any series of debt securities:

In the case of an event of default arising from certain events of bankruptcy or insolvency, with respect to AWCC or American Water, all outstanding debt securities of such series will become due and payable immediately without further action or notice. If any other event of default occurs and is continuing, the trustee or the holders of at least 25% in aggregate principal amount of the outstanding debt securities of such series may declare the principal amount of all the securities of that series to be due and payable immediately. After any such acceleration, but before a judgment or decree based on acceleration is obtained by the trustee, the holders of a majority in aggregate principal amount of the outstanding debt securities of such series may, under certain circumstances, rescind and annul such acceleration and waive such event of default if all events of default, other than the nonpayment of accelerated principal have been cured or waived as provided for in the indenture.

Holders of debt securities of a series may not enforce the indenture or such debt securities except as provided in the indenture. Subject to certain limitations, holders of a majority in principal amount of the then outstanding debt securities of a series may direct the trustee in its exercise of any trust or power. The trustee may withhold from holders of a series of debt securities notice of any continuing default if it determines that withholding notice is in their interest, except a default relating to the payment of principal or interest.

Subject to the provisions of the indenture relating to the duties of the trustee, in case an event of default shall occur and be continuing, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request or direction of any of the holders of a series of debt securities, unless such holders shall have offered to the trustee reasonable indemnity or security against any loss, liability or expense. Subject to such provisions for indemnification of the trustee, the holders of a majority in principal amount of a series of debt securities then outstanding will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust or power conferred on the trustee with respect to such series of outstanding debt securities.

The holders of a majority in aggregate principal amount of debt securities of a series then outstanding may, on behalf of the holders of all debt securities of such series, waive any past default and its consequences under the indenture except a default in the payment of interest on, or the principal of, debt securities of such series (other than the non-payment of principal of or interest on debt securities of such series that became due solely because of the acceleration of debt securities of such series) or a covenant or provision of the indenture that cannot be modified or amended without the consent of each holder of each debt security of such series affected.

AWCC is required to deliver to the trustee within 90 days after the end of each fiscal year a statement regarding compliance with the indenture during that fiscal year. Promptly (and in any event within 5 business days) upon a responsible officer, as defined below, of AWCC becoming aware of any default or event of default, AWCC is required to deliver to the trustee a statement specifying that default.

“Responsible officer” means the chief executive officer, chief operating officer, general counsel, any senior financial officer and any other officer of AWCC with responsibility for the administration of the indenture.

“Senior financial officer” means the chief financial officer, principal accounting officer, treasurer or controller of AWCC.

Except as provided below, AWCC and the trustee may supplement and amend the indenture with the consent of the holders of not less than a majority in principal amount of the outstanding debt securities. The consent of the holder of each outstanding debt security affected is required to:

AWCC and the trustee may supplement and amend the indenture without the consent of any holder for the following purposes:

The consent of the holders of the debt securities is not necessary under the indenture to approve the particular form of any proposed amendment or supplemental indenture. It is sufficient if such consent approves the substance of the proposed amendment or supplemental indenture.

Any money that AWCC deposits with the trustee or any paying agent for the payment of principal, premium, if any, or interest on any debt security that remains unclaimed for two years after the date upon which the principal, premium, if any, and interest are due and payable will be repaid to AWCC upon AWCC’s request unless otherwise required by mandatory provisions of any applicable unclaimed property law. After that time, unless otherwise required by mandatory provisions of any unclaimed property law, the holder of any debt security will be able to seek any payment to which that holder may be entitled only from AWCC.

No director, officer, employee, incorporator or shareholder of AWCC or American Water, will have any liability for any obligations of AWCC or American Water under the debt securities, the indenture or the support agreement, or for any claim based on, in respect of, or by reason of, such obligations or their creation. Each holder of a debt security by accepting such debt security waives and releases all such liability. The waiver and release are part of the consideration for issuance of the debt securities. The waiver may not be effective to waive liabilities under the Securities Act and it is the view of the SEC that such waiver is against public policy.

At any time, AWCC may terminate all its obligations under debt securities of a series and the indenture with respect to such debt securities, which is referred to as “legal defeasance,” except for certain obligations, including those respecting the defeasance trust and obligations to register the transfer or exchange of debt securities of such series, to replace mutilated, destroyed, lost or stolen debt securities of such series and to maintain a registrar and paying agent in respect of the debt securities of such series.

In addition, at any time AWCC may terminate its obligations under certain specified covenants with respect to a series of debt securities.

AWCC may exercise its legal defeasance option with respect to a series of debt securities notwithstanding its prior exercise of its covenant defeasance option with respect to such series of debt securities. If AWCC exercises its legal defeasance

In order to exercise either defeasance option with respect to debt securities of a series, AWCC must irrevocably deposit in trust, which is referred to as the “defeasance trust,” with the trustee money or U.S. government obligations, or both, in an amount deemed sufficient in the opinion of a nationally recognized firm of independent public accountants for the payment of principal and premium, if any, and interest on such debt securities to maturity, and must comply with certain other conditions, including delivery to the trustee of an opinion of counsel to the effect that holders of the debt securities of such series will not recognize gain or loss for U.S. federal income tax purposes as a result of such deposit and defeasance and will be subject to U.S. federal income tax on the same amounts, in the same manner and at the same times as would have been the case if such deposit and defeasance had not occurred (and, in the case of legal defeasance only, such opinion of counsel must be based on a ruling of the Internal Revenue Service or change in applicable U.S. federal income tax law).

When (i) AWCC delivers to the trustee all outstanding debt securities of a series (other than any debt securities replaced because of mutilation, loss, destruction or wrongful taking) for cancellation or (ii) all outstanding debt securities of such series have become due and payable, or are by their terms due and payable within one year whether at maturity or are to be called for redemption within one year under arrangements reasonably satisfactory to the trustee, and in the case of clause (ii) AWCC irrevocably deposits with the trustee funds sufficient to pay at maturity or upon redemption all outstanding debt securities of such series, including interest thereon, and if in either case AWCC pays all other sums related to the applicable series of debt securities payable under the indenture by AWCC, then the indenture shall, subject to certain surviving provisions, cease to be of further effect with respect to such series. The trustee shall acknowledge satisfaction and discharge of the indenture with respect to the applicable series of debt securities on request of AWCC accompanied by an officers’ certificate and an opinion of counsel of AWCC.

The indenture and the debt securities will be governed by, and construed in accordance with, the laws of the State of New York, without regard to conflicts of laws principles thereof.

Except as set forth in the applicable prospectus supplement, each series of debt securities will be issued in registered, global form and will be represented by one or more global securities. Upon issuance, each of the global securities will be deposited with the trustee as custodian for The Depository Trust Company, which is referred to as “DTC,” in New York, New York, and registered in the name of DTC or its nominee, in each case for credit to an account of a direct or indirect participant in DTC as described below.

Except as set forth below, the global securities may be transferred, in whole and not in part, only to another nominee of DTC or to a successor of DTC or its nominee. Beneficial interests in the global securities may not be exchanged for definitive debt securities in registered certificated form, which is referred to as “certificated debt securities,” except in the limited circumstances described below. See “—Exchanges of Global Securities for Certificated Debt Securities.” Except in the limited circumstances described below, owners of beneficial interests in the global securities will not be entitled to receive physical delivery of the debt securities in certificated form.

Transfers of beneficial interests in the global securities will be subject to the applicable rules and procedures of DTC and its direct or indirect participants, which may change from time to time.

A beneficial interest in a global security may not be exchanged for a debt security in certificated form unless (i) DTC (x) notifies AWCC that it is unwilling or unable to continue as depository for such global security or (y) has ceased to be a clearing agency registered under the Exchange Act, or (ii) there shall have occurred and be continuing an event of default with respect to the debt securities. In all cases, certificated debt securities delivered in exchange for any global security or beneficial interests therein will be registered in the names, and issued in approved denominations, requested by or on behalf of DTC (in accordance with its customary procedures).

The following description of the operations and procedures of DTC is provided solely as a matter of convenience. These operations and procedures are solely within the control of the respective settlement systems and are subject to changes by them from time to time. American Water, AWCC and the trustee take no responsibility for these operations and procedures and urge investors to contact the system or their participants directly to discuss these matters.

Upon the issuance of the global securities, DTC will credit, on its internal system, the respective principal amount of the individual beneficial interests represented by such global securities to the accounts with DTC, which are referred to as “participants,” or persons who hold interests through participants. Ownership or beneficial interests in the global securities will be shown on, and the transfer of that ownership will be effected only through, records maintained by DTC or its nominee (with respect to interests of participants) and the records of participants (with respect to interest of persons other than participants).

As long as DTC, or its nominee, is the registered holder of a global security, DTC or such nominee, as the case may be, will be considered the sole owner and holder of the debt securities represented by such global security for all purposes under the indenture and the debt securities. Except in the limited circumstances described above under “—Exchanges of Global Securities for Certificated Debt Securities,” owners of beneficial interests in a global security will not be entitled to have portions of such global security registered in their names, will not receive or be entitled to receive physical delivery of debt securities in definitive form and will not be considered the owners or holders of the global security (or any debt securities presented thereby) under the indenture or the debt securities. In addition, no beneficial owner of an interest in a global security will be able to transfer that interest except in accordance with DTC’s applicable procedures, in addition to those under the indenture referred to herein.

Investors may hold their interests in the global securities directly through DTC, if they are participants in such system, or indirectly through organizations which are participants in such system. All interests in a global security may be subject to the procedures and requirements of DTC.

The laws of some jurisdictions may require that certain persons take physical delivery in definitive form of securities that they own. Consequently, the ability to transfer beneficial interests in a global security to such persons may be limited to that extent. Because DTC can act only on behalf of participants, which in turn act on behalf of indirect participants and certain banks, the ability of a person having beneficial interests in a global security to pledge such interests to persons or entities that do not participate in the DTC system, or otherwise take action in respect of such interests, may be affected by the lack of a physical certificate evidencing such interests.

Payments of the principal of and interest on global securities will be made to DTC or its nominee as the registered holder thereof. Neither AWCC, the trustee nor any of their respective agents will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests in the global securities or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

AWCC expects that DTC or its nominee, upon receipt of any payment of principal or interest in respect of a global security representing any debt securities held by it or its nominee, will immediately credit participants’ accounts with payment in amounts proportionate to their respective beneficial interests in the principal amount of such debt securities as shown on the records of DTC or its nominee. AWCC also expects that payments by participants to owners of beneficial interests in such global securities held through such participants will be governed by standing instructions and customary practices, as is the case with securities held for the accounts of customers registered in “street name.” Such payments will be the responsibility of such participants.

Transfers between participants in DTC will be effected in accordance with DTC’s procedures.

DTC has advised AWCC that DTC will take any action permitted to be taken by a holder of debt securities (including the presentation of debt securities for exchange as described below) only at the direction of one or more participants to whose account with DTC interests in the global securities are credited and only in respect of such portion of the aggregate principal amount of the debt securities as to which such participant or participants has or have given such direction. However, if there is an event of default under the debt securities, DTC reserves the right to exchange the global securities for legended debt securities in certificated form, and to distribute such debt securities to its participants.

DTC has advised AWCC that DTC is:

DTC was created to hold securities for its participants and facilitate the clearance and settlement of securities transactions between participants through electronic book-entry changes in accounts of its participants, thereby eliminating the need for physical transfer and delivery of certificates. Participants include securities brokers and dealers, banks, trust companies and clearing corporations and may include certain other organizations. DTC is partially owned by some of these participants or their representatives. Indirect access to the DTC system is available to other entities such as banks, brokers, dealers and trust companies that clear through or maintain a custodial relationship with a participant, either directly or indirectly, which we refer to as indirect participants.

Although DTC has agreed to the foregoing procedures in order to facilitate transfers of beneficial ownership interests in the global securities among participants of DTC, it is under no obligation to perform or continue to perform such procedures, and such procedures may be discontinued at any time. None of AWCC, the trustee nor any of their respective agents will have any responsibility for the performance by DTC or its participants or indirect participants of its respective obligations under the rules and procedures governing its operations, including maintaining, supervising or reviewing the records relating to, or payments made on account of, beneficial ownership interests in global securities.

AWCC will make payments in respect of the debt securities represented by the global securities (including principal, premium, if any, and interest) by wire transfer of immediately available funds to the accounts specified by the global security holder. AWCC will make all payments of principal, interest and premium, if any, with respect to certificated debt securities by wire transfer of immediately available funds to the accounts specified by the holders of the certificated debt securities or, if no such account is specified, by mailing a check to each such holder’s registered address.

American Water may offer fractional shares of preferred stock, rather than full shares of preferred stock. If American Water decides to offer fractional shares of preferred stock, American Water will issue receipts for depositary shares. Each depositary share will represent a fraction of a share of a particular series of preferred stock, and the prospectus supplement will indicate that fraction. The shares of preferred stock represented by depositary shares will be deposited under a depositary agreement between American Water and a depositary that is a bank or trust company that meets certain requirements and is selected by American Water. The depositary will be specified in the applicable prospectus supplement. Each owner of a depositary share will be entitled to all of the rights and preferences of the preferred stock represented by the depositary share. The depositary shares will be evidenced by depositary receipts issued pursuant to the depositary agreement. Depositary receipts will be distributed to those persons purchasing the fractional shares of preferred stock in accordance with the terms of the offering.

American Water has summarized selected provisions of the depositary agreement and the depositary receipts, but the summary is qualified in its entirety by reference to the provisions of the depositary agreement and the depositary receipts. The particular terms of any series of depositary shares will be described in the applicable prospectus supplement. If so indicated in the prospectus supplement, the terms of any such series may differ from the terms set forth below.

The depositary will distribute all cash dividends or other cash distributions received by it in respect of the preferred stock to the record holders of depositary shares relating to such preferred shares in proportion to the numbers of depositary shares held on the relevant record date. The amount made available for distribution will be reduced by any amounts withheld by the depositary or American Water on account of taxes.

In the event of a distribution other than in cash, the depositary will distribute securities or property received by it to the record holders of depositary shares in proportion to the numbers of depositary shares held on the relevant record date, unless the depositary determines that it is not feasible to make such distribution. In that case, the depositary may make the distribution by such method as it deems equitable and practicable. One such possible method is for the depositary to sell the securities or property and then distribute the net proceeds from the sale as provided in the case of a cash distribution.

Upon surrender of depositary receipts representing any number of whole shares at the depositary’s office, unless the related depositary shares previously have been called for redemption, the holder of the depositary shares evidenced by the depositary receipts will be entitled to delivery of the number of whole shares of the related series of preferred stock and all money and other property, if any, underlying such depositary shares. However, once such an exchange is made, the preferred stock cannot thereafter be redeposited in exchange for depositary shares. Holders of depositary shares will be entitled to receive whole shares of the related series of preferred stock on the basis set forth in the applicable prospectus supplement. If the depositary receipts delivered by the holder evidence a number of depositary shares representing more than the number of whole shares of preferred stock of the related series to be withdrawn, the depositary will deliver to the holder at the same time a new depositary receipt evidencing the excess number of depositary shares.

Whenever American Water redeems shares of the preferred stock, the depositary will redeem a number of depositary shares representing the same number of shares of preferred stock so redeemed. If fewer than all of the depositary shares are to be redeemed, the depositary shares to be redeemed will be selected by lot, pro‑rata or by any other equitable method as the depositary may determine.

Upon receipt of notice of any meeting at which the holders of the preferred stock of any series are entitled to vote, the depositary will mail the information contained in the notice of the meeting to the record holders of the depositary shares relating to that series of preferred shares. Each record holder of the depositary shares on the record date will be entitled to instruct the depositary as to the exercise of the voting rights represented by the number of shares of preferred stock underlying the holder’s depositary shares. The depositary will endeavor, to the extent it is practical to do so, to vote the number of whole shares of

The form of depositary receipt evidencing the depositary shares and any provision of the applicable depositary agreement may at any time be amended by agreement between American Water and the depositary. American Water may, with the consent of the depositary, amend the depositary agreement from time to time in any manner that American Water desires. However, if the amendment would materially and adversely alter the rights of the existing holders of depositary shares, the amendment would need to be approved by the holders of at least a majority of the depositary shares then outstanding.

The depositary agreement may be terminated by American Water or the depositary if:

The depositary may resign at any time by delivering to us notice of its election to do so. American Water may remove a depositary at any time. Any resignation or removal will take effect upon the appointment of a successor depositary and its acceptance of appointment.

American Water will pay all transfer and other taxes and governmental charges arising solely from the existence of any depositary arrangements. American Water will pay all charges of each depositary in connection with the initial deposit of the preferred shares of any series, the initial issuance of the depositary shares, any redemption of such preferred shares and any withdrawals of such preferred shares by holders of depositary shares. Holders of depositary shares will be required to pay any other transfer taxes.

Each depositary will forward to the holders of the applicable depositary shares all notices, reports and communications from American Water which are delivered to such depositary and which are required to be furnished to the holders of the preferred shares.

The depositary agreement will contain provisions that limit American Water’s liability and the liability of the depositary to the holders of depositary shares. Both the depositary and American Water will also be entitled to an indemnity from the holders of the depositary shares prior to bringing, or defending against, any legal proceeding. American Water or any depositary may rely upon written advice of counsel or accountants, or information provided by persons presenting preferred shares for deposit, holders of depositary shares or other persons believed by American Water to be competent and on documents believed by American Water or them to be genuine.

American Water may issue stock purchase contracts, including contracts obligating holders to purchase from American Water, and obligating American Water to sell to the holders, a specified number of shares of common stock or other securities at a future date or dates, which are referred to as “stock purchase contracts.” The price per share of the securities and the number of shares of the securities may be fixed at the time the stock purchase contracts are issued or may be determined by reference to a specific formula set forth in the stock purchase contracts. The stock purchase contracts may be issued separately or as part of units consisting of a stock purchase contract and debt securities, preferred securities, warrants or debt obligations of third parties, including U.S. treasury securities, securing the holders’ obligations to purchase the securities under the stock purchase contracts, which are referred to as “stock purchase units.” The stock purchase contracts may require holders to secure their obligations under the stock purchase contracts in a specified manner. The stock purchase contracts also may require American Water to make periodic payments to the holders of the stock purchase units or vice versa, and those payments may be unsecured or refunded on some basis.

The applicable prospectus supplement will describe the terms of the stock purchase contracts or stock purchase units. The description in the prospectus supplement will not necessarily be complete, and reference will be made to the stock purchase contracts, and, if applicable, collateral or depositary arrangements, relating to the stock purchase contracts or stock purchase units, which will be filed with the SEC each time American Water issues stock purchase contracts or stock purchase units. Material U.S. federal income tax considerations applicable to the stock purchase units and the stock purchase contracts will also be discussed in the applicable prospectus supplement.

American Water may issue subscription rights to purchase common stock, preferred stock, depositary shares or warrants to purchase preferred stock, common stock or depositary shares. Subscription rights may be issued independently or together with any other offered security and may or may not be transferable by the person purchasing or receiving the subscription rights. In connection with any subscription rights offering to American Water’s shareholders, American Water may enter into a standby underwriting arrangement with one or more underwriters pursuant to which such underwriters will purchase any offered securities remaining unsubscribed for after such subscription rights offering. In connection with a subscription rights offering to American Water’s shareholders, American Water will distribute certificates evidencing the subscription rights and a prospectus supplement to American Water’s shareholders on or about the record date that American Water sets for receiving subscription rights in such subscription rights offering.

The applicable prospectus supplement will describe the following terms of subscription rights in respect of which this prospectus is being delivered:

Each subscription right will entitle the holder of the subscription right to purchase for cash such amount of shares of preferred stock, depositary shares, common stock, warrants or any combination thereof, at such exercise price as shall in each case be set forth in, or be determinable as set forth in, the prospectus supplement relating to the subscription rights offered thereby. Subscription rights may be exercised at any time up to the close of business on the expiration date for such subscription rights set forth in the prospectus supplement. After the close of business on the expiration date, all unexercised subscription rights will become void.

Subscription rights may be exercised as set forth in the prospectus supplement relating to the subscription rights offered thereby. Upon receipt of payment and the subscription rights certificate properly completed and duly executed at the corporate trust office of the subscription rights agent or any other office indicated in the prospectus supplement, American Water will forward, as soon as practicable, the shares of preferred stock or common stock, depositary shares or warrants purchasable upon such exercise. American Water may determine to offer any unsubscribed offered securities directly to persons other than shareholders, to or through agents, underwriters or dealers or through a combination of such methods, including pursuant to standby underwriting arrangements, as set forth in the applicable prospectus supplement.

American Water may issue warrants for the purchase of debt securities, preferred stock, depositary shares or common stock. Warrants may be issued independently or together with debt securities, preferred stock, depositary shares or common stock offered by any prospectus supplement and may be attached to or separate from any such offered securities. Each series of warrants will be issued under a separate warrant agreement to be entered into between American Water and a bank or trust company, as warrant agent. The warrant agent will act solely as American Water’s agent in connection with the warrants and will not assume any obligation or relationship of agency or trust for or with any holders or beneficial owners of warrants.

The prospectus supplement relating to a particular issue of debt warrants will describe the terms of such debt warrants, including the following:

The prospectus supplement relating to any particular issue of warrants for preferred stock, depositary shares or common stock will describe the terms of such warrants, including the following:

We and any selling security holder may offer and sell the securities covered by this prospectus from time to time, in one or more transactions, at market prices prevailing at the time of sale, at prices related to market prices, at a fixed price or prices subject to change, at varying prices determined at the time of sale or at negotiated prices, by a variety of methods, including the following:

Registration of the securities covered by this prospectus does not mean that those securities necessarily will be offered or sold.

In effecting sales, brokers or dealers engaged by us may arrange for other brokers or dealers to participate. Broker-dealer transactions may include:

In addition, we and any selling security holder may sell any securities covered by this prospectus in private transactions or under Rule 144 of the Securities Act rather than pursuant to this prospectus.

In connection with the sale of securities covered by this prospectus, broker-dealers may receive commissions or other compensation from us in the form of commissions, discounts or concessions. Broker-dealers may also receive compensation from purchasers of the securities for whom they act as agents or to whom they sell as principals or both. Compensation as to a particular broker-dealer may be in excess of customary commissions or in amounts to be negotiated. In connection with any underwritten offering, underwriters may receive compensation in the form of discounts, concessions or commissions from us or from purchasers of the securities for whom they act as agents. Underwriters may sell the securities to or through dealers, and such dealers may receive compensation in the form of discounts, concessions or commissions from the underwriters and/or commissions from the purchasers for whom they may act as agents. Any underwriters, broker-dealers, agents or other persons acting on our behalf that participate in the distribution of the securities may be deemed to be “underwriters” within the meaning of the Securities Act, and any profit on the sale of the securities by them and any discounts, commissions or concessions received by any of those underwriters, broker-dealers, agents or other persons may be deemed to be underwriting discounts and commissions under the Securities Act.

In connection with the distribution of the securities covered by this prospectus or otherwise, we or any selling security holder may enter into hedging transactions with broker-dealers or other financial institutions. In connection with such transactions, broker-dealers or other financial institutions may engage in short sales of our securities in the course of hedging the positions they assume with us or any selling security holder. We or any selling security holder may also sell securities short and deliver the securities offered by this prospectus to close out short positions. We or any selling security holder may also enter into option or other transactions with broker-dealers or other financial institutions, which require the delivery to such broker-dealer or other financial institution of securities offered by this prospectus, which securities such broker-dealer or other financial institution may resell pursuant to this prospectus, as supplemented or amended to reflect such transaction. We or any selling security holder may also from time to time pledge our securities pursuant to the margin provisions of customer agreements with brokers. Upon a default, the broker may offer and sell such pledged securities from time to time pursuant to this prospectus, as supplemented or amended to reflect such transaction.

At any time a particular offer of the securities covered by this prospectus is made, a prospectus supplement, or, if required, a revised prospectus, will be distributed which will set forth the aggregate amount of securities covered by this prospectus being offered and the terms of the offering, including the name or names of any underwriters, dealers, brokers or agents, any discounts, commissions, concessions and other items constituting compensation from us and any discounts, commissions or concessions allowed or reallowed or paid to dealers. Such prospectus supplement, and, if necessary, a post-effective amendment to the registration statement of which this prospectus is a part, will be filed with the SEC to reflect the disclosure of additional information with respect to the distribution of the securities covered by this prospectus. In order to comply with the securities laws of certain states, if applicable, the securities sold under this prospectus may only be sold through registered or licensed broker-dealers. In addition, in some states the securities may not be sold unless they have been registered or qualified for sale in the applicable state or an exemption from registration or qualification requirements is available and is complied with.

We may solicit offers to purchase directly. Offers to purchase securities also may be solicited by agents designated by us from time to time. Any such agent involved in the offer or sale of the securities in respect of which this prospectus is delivered will be named, and any commissions payable by us to such agent will be set forth, in the applicable prospectus supplement. Unless otherwise indicated in such prospectus supplement, any such agent will be acting on a reasonable best efforts basis for the period of its appointment. Any such agent may be deemed to be an underwriter, as that term is defined in the Securities Act, of the securities so offered and sold.

American Water may offer its equity securities into an existing trading market on the terms described in the applicable prospectus supplement. Underwriters, dealers and agents who may participate in any at-the-market offerings will be described in the prospectus supplement relating thereto.

Securities may also be offered and sold, if so indicated in the applicable prospectus supplement, in connection with a remarketing upon their purchase, in accordance with a redemption or repayment pursuant to their terms, or otherwise, by one or more firms acting as principals for their own accounts or as agents, which are referred to as “remarketing firms.” Any remarketing firm will be identified and the terms of its agreement, if any, with us and its compensation will be described in the applicable prospectus supplement. Remarketing firms may be deemed to be underwriters, as that term is defined in the Securities Act, in connection with the securities remarketed thereby.

If so indicated in the applicable prospectus supplement, we may authorize agents, dealers or underwriters to solicit offers by certain institutions to purchase securities from us at the public offering price set forth in the applicable prospectus supplement pursuant to delayed delivery contracts providing for payment and delivery on the date or dates stated in the applicable prospectus supplement. Such delayed delivery contracts will be subject to only those conditions set forth in the

In connection with an underwritten offering, we and any selling security holder would execute an underwriting agreement with an underwriter or underwriters. Unless otherwise indicated in the revised prospectus or applicable prospectus supplement, such underwriting agreement would provide that the obligations of the underwriter or underwriters are subject to certain conditions precedent, and that the underwriter or underwriters with respect to a sale of the covered securities will be obligated to purchase all of the covered securities, if any such securities are purchased. We or any selling security holder may grant to the underwriter or underwriters an option to purchase additional securities at the public offering price, less any underwriting discount, as may be set forth in the revised prospectus or applicable prospectus supplement. If we or any selling security holder grants any such option, the terms of that option will be set forth in the revised prospectus or applicable prospectus supplement.

Underwriters, agents, brokers or dealers may be entitled, pursuant to relevant agreements entered into with us, to indemnification by us or any selling security holder against certain civil liabilities, including liabilities under the Securities Act that may arise from any untrue statement or alleged untrue statement of a material fact, or any omission or alleged omission to state a material fact in this prospectus, any supplement or amendment hereto, or in the registration statement of which this prospectus forms a part, or to contribution with respect to payments which the underwriters, agents, brokers or dealers may be required to make.

The validity of the securities offered in this prospectus and any related prospectus supplement and certain legal matters will be passed upon for us by Morgan, Lewis & Bockius LLP, New York, New York, and/or counsel named in the applicable prospectus supplement. If the securities are being distributed in an underwritten offering, certain legal matters will be passed upon for the underwriters by counsel identified in the related prospectus supplement.

American Water is incorporating by reference into this prospectus the following documents filed with the SEC (excluding any portions of such documents that have been “furnished” but not “filed” for purposes of the Exchange Act):

The following table lists the estimated expenses to be incurred by the registrants in connection with the offer and sale of securities registered under this registration statement.

Below is a description of the general effect of arrangements under which directors or officers of American Water or AWCC are insured or indemnified in any manner against liability that they may incur in their capacity as such. American Water has obtained officers’ and directors’ liability insurance that insures against liabilities that directors and officers of American Water and its subsidiaries, including AWCC, may, in such capacities, incur. Any underwriting agreement that American Water or AWCC may enter into in connection with the sale of any securities registered hereunder may also provide for indemnification of directors and officers of American Water or AWCC by the underwriters against certain liabilities.

Pursuant to the authority conferred by Section 102(b)(7) of the General Corporation Law of the State of Delaware (the “DGCL”), Article VIII of American Water’s Restated Certificate of Incorporation (the “Restated Certificate”) provides that no director shall be personally liable to American Water or its shareholders for monetary damages for breach of fiduciary duty as a director; provided, however, that the foregoing shall not eliminate or limit the liability of a director (i) for any breach of the director’s duty of loyalty to American Water or its shareholders, (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of law, (iii) under Section 174 of the DGCL which provides for liability of directors for unlawful payments of dividends or unlawful stock purchases or redemptions, or (iv) for any transaction from which the director derived an improper personal benefit. Article VIII of the Restated Certificate further provides that any repeal or modification of Article VIII by the shareholders of American Water shall be prospective only, and shall not affect, to the detriment of any director, any limitation on the personal liability of a director of American Water existing at the time of such repeal or modification.

Section 145(a) of the DGCL provides in relevant part that a corporation may indemnify any person who was, is or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that such person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding if such person acted in good faith and in a manner such person reasonably

Section 145(b) of the DGCL provides in relevant part that a corporation may indemnify any person who was, is or is threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation to procure a judgment in its favor by reason of the fact that the person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys’ fees) actually and reasonably incurred by such person in connection with the defense or settlement of such action or suit if the person acted in good faith and in a manner the person reasonably believed to be in or not opposed to the best interests of the corporation and except that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to the corporation unless and only to the extent that the Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Court of Chancery or such other court shall deem proper.

Article IX of the Restated Certificate provides that each person who is or was or had agreed to become a director or officer of American Water, and each such person who is or was serving or who had agreed to serve at the request of American Water as a director, officer, partner, member, trustee, employee or agent of another corporation, partnership, limited liability company, joint venture, trust or other enterprise (including the heirs, executor, administrators or estate of such person), shall be indemnified by American Water to the fullest extent permitted from time to time by applicable law.

Article X of American Water’s Amended and Restated Bylaws (the “American Water Bylaws”) generally provides that American Water will indemnify and hold harmless, to the fullest extent permitted by the DGCL (as the same exists now or as it may be hereinafter amended, but, in the case of any such amendment, only to the extent that such amendment permits American Water to provide broader indemnification rights than the DGCL permitted American Water to provide prior to such amendment), any director or officer of American Water (and certain other persons), and the heirs, executors, administrators or estate of such persons (collectively, “Covered Persons”), who was or is a party or is threatened to be made a party to, or otherwise becomes involved in, any threatened, pending or completed action, suit, investigation, inquiry, hearing, mediation, arbitration, other alternative dispute mechanism or any other proceeding, whether civil, criminal, administrative, regulatory, investigative, legislative or otherwise and whether formal or informal (other than an action by or in the right of American Water), against expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with a covered proceeding if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of American Water, and, with respect to any criminal proceeding, had no reasonable cause to believe his or her conduct was unlawful.

In the case of any action, suit or proceeding by or in the right of American Water in which such person shall have been adjudged to be liable to American Water, American Water shall indemnify and hold harmless, to the fullest extent permitted by the DGCL, any Covered Person who was or is a party or is threatened to be made a party to, or otherwise becomes involved in, any covered proceeding by or in the right of American Water against expenses (including attorneys’ fees) actually and reasonably incurred by such person in connection with the defense or settlement of such action or suit if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of American Water; provided that no indemnification shall be made in respect of any claim, issue or matter as to which such person shall have been adjudged to be liable to American Water unless and only to the extent that Delaware Court of Chancery or the court in which such action or suit was brought shall determine upon application that, despite the adjudication of liability but in view of all the circumstances of the case, such person is fairly and reasonably entitled to indemnity for such expenses which the Delaware Court of Chancery or such other court shall deem proper.

Article X of the American Water Bylaws also provides that expenses (including attorneys’ fees) incurred by any Covered Person in defending any covered proceeding shall be paid by American Water in advance of the final disposition of such proceeding within ten (10) calendar days after the receipt by American Water of a statement or statements from the claimant requesting such advance or advances from time to time; provided, that the payment of such expenses incurred by a Covered Person in his or her capacity as a director or officer shall be made only upon delivery to the Corporation of an undertaking in writing by or on behalf of such Covered Person to repay all amounts so advanced if it shall ultimately be determined by final judicial decision from which there is no further right of appeal that such Covered Person is not entitled to be indemnified for such expenses.

Section 145(g) of the DGCL provides that a corporation shall have power to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise

Section 9 of the certificate of incorporation of AWCC entitles directors of AWCC to benefit from all limitations on the liability of directors that are now or hereafter become available under the DGCL, including, without limitation, as permitted by Section 102(b)(7) thereof. Any repeal or modification of Section 9 shall be prospective only, and shall not affect, to the detriment of any director, any limitation on the personal liability of a director of AWCC existing at the time of such repeal or modification.

Article IV of the by-laws of AWCC (the “AWCC Bylaws”) generally provides that AWCC will indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, by reason of the fact that such person is or was a director or officer of AWCC or a constituent corporation absorbed in a consolidation or merger, or is or was serving at the request of AWCC or a constituent corporation absorbed in a consolidation or merger as a director, officer, administrator, trustee or other fiduciary of another corporation or of a partnership, joint venture, trust or other enterprise, including an employee benefit plan, against expenses (including attorneys’ fees), liability and loss actually and reasonably incurred or suffered by such person in connection with such AWCC proceeding, whether or not the indemnified liability arises or arose from any threatened, pending or completed proceeding by or in the right of AWCC, except to the extent that such indemnification is prohibited by law.

Article IV of the AWCC Bylaws also provides that any expenses incurred by a director or officer of AWCC in defending a proceeding covered by Article IV shall be paid by AWCC in advance of the final disposition of such proceeding, subject to the provisions of any applicable statute.

To determine whether any indemnification or advance of expenses under Article IV of the AWCC Bylaws is permissible, the board of directors of AWCC by a majority vote of a quorum consisting of directors not parties to such proceeding may, and on request of any person seeking indemnification or advancement of expenses shall be required to, determine in each case whether the applicable standards of law have been met, or such determination shall be made by independent legal counsel if such quorum is not obtainable, or, even if obtainable, a majority vote of a quorum of disinterested directors so directs, provided that, if there has been a change in control of AWCC between the time of the action or failure to act giving rise to the claim for indemnification or advancement of expenses and the time such claim is made, then at the option of the person seeking indemnification or advancement of expenses the permissibility of indemnification or advancement of expenses shall be determined by independent legal counsel. The reasonable expenses of any director or officer in prosecuting a successful claim for indemnification, and the fees and expenses of any independent legal counsel engaged to determine permissibility of indemnification or advancement of expenses, shall be borne by AWCC.

Pursuant to the requirements of the Securities Act of 1933, American Water Works Company, Inc. certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Camden, New Jersey, on February 20, 2024.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

Each person in so signing also makes, constitutes and appoints M. Susan Hardwick, John C. Griffith, James H. Gallegos and Jeffrey M. Taylor, and each of them acting alone, his or her true and lawful attorney-in-fact, with full power of substitution, to do any and all acts and things in his or her name and on his or her behalf in his or her capacity as a director and/or officer and to execute any and all documents for him or her in such capacity, which said attorneys and agents, or any of them, may deem necessary or advisable to enable the registrant to comply with the Securities Act of 1933, as amended, and any rules, regulations and requirements of the Securities and Exchange Commission in connection with this Registration Statement, including, without limitation, the execution and filing with the Securities and Exchange Commission of any and all amendments and post-effective amendments to this Registration Statement, with exhibits thereto and other documents in connection therewith, and hereby ratifies and confirms all that said attorney-in-fact or his or her substitute or substitutes may do or cause to be done by virtue hereof.