SMITH A O CORP — Director's Dealing 2007

Jul 24, 2007

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SMITH A O CORP (AOS)
CIK: 0000091142
Period of Report: 2007-07-20

Reporting Person: O TOOLE ROBERT J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2007-07-20	Common Stock	M	181800	$15.135	Acquired	481862	Direct
2007-07-20	Common Stock	F	103188	$49.9206	Disposed	378674	Direct
2007-07-20	Common Stock	S	6000	$49.00	Disposed	372674	Direct
2007-07-20	Common Stock	S	1100	$49.01	Disposed	371574	Direct
2007-07-20	Common Stock	S	1700	$49.02	Disposed	369874	Direct
2007-07-20	Common Stock	S	600	$49.03	Disposed	369274	Direct
2007-07-20	Common Stock	S	600	$49.04	Disposed	368674	Direct
2007-07-20	Common Stock	S	500	$49.07	Disposed	368174	Direct
2007-07-20	Common Stock	S	800	$49.08	Disposed	367374	Direct
2007-07-20	Common Stock	S	700	$49.09	Disposed	366674	Direct
2007-07-20	Common Stock	S	1500	$49.10	Disposed	365174	Direct
2007-07-20	Common Stock	S	400	$49.12	Disposed	364774	Direct
2007-07-20	Common Stock	S	500	$49.13	Disposed	364274	Direct
2007-07-20	Common Stock	S	1600	$49.14	Disposed	362674	Direct
2007-07-20	Common Stock	S	750	$49.15	Disposed	361924	Direct
2007-07-20	Common Stock	S	650	$49.16	Disposed	361274	Direct
2007-07-20	Common Stock	S	3700	$49.17	Disposed	357574	Direct
2007-07-20	Common Stock	S	100	$49.18	Disposed	357474	Direct
2007-07-20	Common Stock	S	1700	$49.21	Disposed	355774	Direct
2007-07-20	Common Stock	S	700	$49.22	Disposed	355074	Direct
2007-07-20	Common Stock	S	100	$49.23	Disposed	354974	Direct
2007-07-20	Common Stock	S	900	$49.26	Disposed	354074	Direct
2007-07-20	Common Stock	S	100	$49.30	Disposed	353974	Direct
2007-07-20	Common Stock	S	400	$49.37	Disposed	353574	Direct
2007-07-20	Common Stock	S	2300	$49.39	Disposed	351274	Direct
2007-07-20	Common Stock	S	400	$49.40	Disposed	350874	Direct
2007-07-20	Common Stock	S	1100	$50.00	Disposed	349774	Direct
2007-07-20	Common Stock	S	100	$50.01	Disposed	349674	Direct
2007-07-20	Common Stock	S	400	$50.05	Disposed	349274	Direct
2007-07-20	Common Stock	S	400	$50.06	Disposed	348874	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2007-07-20	Employee Stock Options (Right to Buy)	$15.135	M	181800	Disposed	2011-10-09	Common Stock (181800)	Direct

Footnotes

F1: Granted on 10/09/2001 under the A. O. Smith Corporation Long-Term Executive Incentive Compensation Plan, a transaction exempt under Ruble 16b-3.