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 * Warren David R   2. Issuer Name and Ticker or Trading Symbol SMITH A O CORP [AOS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Senior VP & President and GM (Last) (First) (Middle) A. O. SMITH CORPORATION, 500 TENNESSEE WALTZ PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 02/08/2019 (Street) ASHLAND CITY, TN 37015 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 02/08/2019   A   1,420 (1) A $ 48.72 4,963 (2) D   Common Stock 02/08/2019   F   635 D $ 48.72 4,328 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

Restricted Stock Units

$ 48.72

02/08/2019

M

1,420

(1)

(1)

Common Stock

1,420

$ 0

2,900

D

Restricted Stock Units

$ 49.42

02/11/2019

A

3,740

(3)

(3)

Common Stock

3,740

$ 0

6,640

D

Employee Stock Options (Right to Buy)

$ 49.42

02/11/2019

A

17,065

(4)

02/11/2029

Common Stock

17,065

$ 0

39,731

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Warren David R A. O. SMITH CORPORATION 500 TENNESSEE WALTZ PARKWAY ASHLAND CITY, TN 37015			Senior VP & President and GM

Signatures

James F. Stern, Attorney-in-Fact for David R. Warren		02/12/2019
**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)	1,420 Restricted Stock Units were granted on 02/08/2016, under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3. 1,420 Restrited Stock Units vested on 02/08/2019. As a result of vesting, the Company is obligated to deliver 1,420 shares of Common Stock to the reporting person.
(2)	Mr. Warren was a participant in the A. O. Smith Dividend Reinvestment Plan ('Plan") and received a quarterly dividend pursuant to the Plan. The total amount of dividends received was 2 shares of Common Stock.
(3)	The restricted stock units were granted on 02/11/2019 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3. The restricted stock units become payable in Common Stock on the vesting date of 02/11/2022.
(4)	The employee stock options were granted on 02/11/2019 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3. The options become exercisable in three annual installments of 1/3 of the award starting on 02/11/2020.

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