SMITH A O CORP — Director's Dealing 2012

Feb 10, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SMITH A O CORP (AOS)
CIK: 0000091142
Period of Report: 2012-02-09

Reporting Person: RETTLER STEVE W (Senior Vice President - CD)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-02-09	Common Stock	M	3750	$45.588	Acquired	20007	Direct
2012-02-10	Common Stock	S	1578	$45.588	Disposed	18429	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-02-09	Restricted Stock Units	$	M	3750	Disposed		Common Stock (3750)	Direct

Footnotes

F1: 3,750 Restricted Stock Units were granted on 02/09/2009, under the A. O. Smith Combined Incentive Compensation Plan, a transaction excempt under Rule 16b-3. 3,750 Restricted Stock Units vested on 02/09/2012. As of result of vesting, the Company is obligated to deliver 3,750 shares of Common Stock to the reporting person.

F2: The reporting person sold these shares to obtain funds to pay the withholding taxes due as a result of the vesting of the restricted stock units described in footnote (1).