SMITH A O CORP — Director's Dealing 2011

Feb 11, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SMITH A O CORP (AOS)
CIK: 0000091142
Period of Report: 2011-02-10

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-10	Common Stock	M	16050	$19.133	Acquired	32386	Direct
2011-02-10	Common Stock	M	6750	$16.427	Disposed	39136	Direct
2011-02-10	Common Stock	S	100	$41.59	Disposed	39036	Direct
2011-02-10	Common Stock	S	100	$41.61	Disposed	38936	Direct
2011-02-10	Common Stock	S	300	$41.63	Disposed	38636	Direct
2011-02-10	Common Stock	S	400	$41.65	Disposed	38236	Direct
2011-02-10	Common Stock	S	600	$41.66	Disposed	37636	Direct
2011-02-10	Common Stock	S	400	$41.67	Disposed	37236	Direct
2011-02-10	Common Stock	S	100	$41.68	Disposed	37136	Direct
2011-02-10	Common Stock	S	300	$41.69	Disposed	36836	Direct
2011-02-10	Common Stock	S	300	$41.70	Disposed	36536	Direct
2011-02-10	Common Stock	S	100	$41.71	Disposed	36436	Direct
2011-02-10	Common Stock	S	300	$41.72	Disposed	36136	Direct
2011-02-10	Common Stock	S	200	$41.74	Disposed	35936	Direct
2011-02-10	Common Stock	S	200	$41.75	Disposed	35736	Direct
2011-02-10	Common Stock	S	300	$41.77	Disposed	35436	Direct
2011-02-10	Common Stock	S	100	$41.78	Disposed	35336	Direct
2011-02-10	Common Stock	S	100	$41.79	Disposed	35236	Direct
2011-02-10	Common Stock	S	200	$41.81	Disposed	35036	Direct
2011-02-10	Common Stock	S	100	$41.84	Disposed	34936	Direct
2011-02-10	Common Stock	S	300	$41.85	Disposed	34636	Direct
2011-02-10	Common Stock	S	100	$41.86	Disposed	34536	Direct
2011-02-10	Common Stock	S	100	$41.88	Disposed	34436	Direct
2011-02-10	Common Stock	S	200	$41.89	Disposed	34236	Direct
2011-02-10	Common Stock	S	500	$41.90	Disposed	33736	Direct
2011-02-10	Common Stock	S	200	$41.91	Disposed	33536	Direct
2011-02-10	Common Stock	S	700	$41.92	Disposed	32836	Direct
2011-02-10	Common Stock	S	200	$41.93	Disposed	32636	Direct
2011-02-10	Common Stock	S	300	$41.94	Disposed	32336	Direct
2011-02-10	Common Stock	S	400	$41.96	Disposed	31936	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-10	Employee Stock Options (Right to Buy)	$19.33	M	16050	Disposed	2013-10-07	Common Stock (16050)	Direct
2011-02-10	Employee Stock Options (Right to Buy)	$16.427	M	6750	Disposed	2014-10-12	Common Stock (6750)	Direct

Footnotes

F1: The employee stock options were granted on 10/07/2003, under the A. O. Smith Combined Executive Incentive Compensation Plan, a transaction exempt under rule 16b-3.

F2: The employee stock options were granted on 10/12/2004, under the A. O. Smith Combined Executive Incentive Compensation Plan, a transaction exempt under rule 16b-3.