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: MURPHY TERRY M (Executive Vice President & CFO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-02-10	Common Stock	M	27000	$24.02	Acquired	58217	Direct
2011-02-10	Common Stock	S	100	$41.61	Disposed	58117	Direct
2011-02-10	Common Stock	S	100	$41.63	Disposed	58017	Direct
2011-02-10	Common Stock	S	100	$41.64	Disposed	57917	Direct
2011-02-10	Common Stock	S	400	$41.65	Disposed	57517	Direct
2011-02-10	Common Stock	S	600	$41.66	Disposed	56917	Direct
2011-02-10	Common Stock	S	400	$41.67	Disposed	56517	Direct
2011-02-10	Common Stock	S	700	$41.68	Disposed	55817	Direct
2011-02-10	Common Stock	S	300	$41.69	Disposed	55517	Direct
2011-02-10	Common Stock	S	700	$41.70	Disposed	54817	Direct
2011-02-10	Common Stock	S	500	$41.71	Disposed	54317	Direct
2011-02-10	Common Stock	S	200	$41.72	Disposed	54117	Direct
2011-02-10	Common Stock	S	500	$41.74	Disposed	53617	Direct
2011-02-10	Common Stock	S	300	$41.75	Disposed	53317	Direct
2011-02-10	Common Stock	S	200	$41.76	Disposed	53117	Direct
2011-02-10	Common Stock	S	1000	$41.77	Disposed	52117	Direct
2011-02-10	Common Stock	S	300	$41.78	Disposed	51817	Direct
2011-02-10	Common Stock	S	100	$41.79	Disposed	51717	Direct
2011-02-10	Common Stock	S	500	$41.80	Disposed	51217	Direct
2011-02-10	Common Stock	S	853	$41.81	Disposed	50364	Direct
2011-02-10	Common Stock	S	600	$41.83	Disposed	49764	Direct
2011-02-10	Common Stock	S	100	$41.84	Disposed	49664	Direct
2011-02-10	Common Stock	S	300	$41.85	Disposed	49364	Direct
2011-02-10	Common Stock	S	400	$41.86	Disposed	48964	Direct
2011-02-10	Common Stock	S	200	$41.88	Disposed	48764	Direct
2011-02-10	Common Stock	S	100	$41.89	Disposed	48664	Direct
2011-02-10	Common Stock	S	500	$41.90	Disposed	48164	Direct
2011-02-10	Common Stock	S	500	$41.91	Disposed	47664	Direct
2011-02-10	Common Stock	S	500	$41.92	Disposed	47164	Direct
2011-02-10	Common Stock	S	100	$41.93	Disposed	47064	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2011-02-10	Employee Stock Options (Right to Buy)	$24.02	M	27000	Disposed	2016-01-03	Common Stock (27000)	Direct

Footnotes

F1: The employee stock options were granted on 01/03/2006 under the A. O. Smith Combined Executive Incentive Compensation Plan, a transaction exempt under Rule 16b-3. The options became exercisable in three annual installments of 1/3 of the award starting on 01/03/2007.