FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Degillio Deborah A   2. Issuer Name and Ticker or Trading Symbol American Water Works Company, Inc. [AWK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP and Treasurer (Last) (First) (Middle) 1025 LAUREL OAK ROAD 3. Date of Earliest Transaction (Month/Day/Year) 03/08/2016 (Street) VOORHEES, NJ 08043 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/08/2016   M   692 A $ 39.45 2,630 D   Common Stock 03/08/2016   S   692 D $ 68.37 (1) 1,937 D   Common Stock 03/08/2016   M   1,642 A $ 44.06 3,579 D   Common Stock 03/08/2016   S   1,642 D $ 68.37 (1) 1,937 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option (right to buy)

$ 39.45

03/08/2016

M

692

(2)

12/31/2019

Common Stock

692

$ 0

0 (3)

D

Employee Stock Option (right to buy)

$ 44.06

03/08/2016

M

1,642

(4)

12/31/2020

Common Stock

1,642

$ 0

822

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Degillio Deborah A 1025 LAUREL OAK ROAD VOORHEES, NJ 08043			VP and Treasurer

Signatures

/s/ Jeffrey M. Taylor, as attorney-in-fact for Deborah A. Degillio		03/09/2016
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $68.36 to $68.37, inclusive. The reporting person undertakes to provide to American Water Works Company, Inc., any security holder thereof, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
(2)	The option award granted on February 21, 2013, representing a right to purchase 2,075 shares, vested in three equal installments on January 1, 2014, 2015 and 2016.
(3)	A prior exercise of 1,383 shares underlying this option was previously reported.
(4)	The option award granted on February 20, 2014, representing a right to purchase 2,464 shares, vests in three equal installments on January 1, 2015, 2016 and 2017.

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