SMITH A O CORP — Director's Dealing 2006

Jan 27, 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SMITH A O CORP (AOS)
CIK: 0000091142
Period of Report: 2006-01-25

Reporting Person: O TOOLE ROBERT J (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-01-25	Common Stock	M	96900	$16.333	Acquired	441948	Direct
2006-01-26	Common Stock	S	25900	$42.60	Disposed	416048	Direct
2006-01-26	Common Stock	S	1800	$42.61	Disposed	414248	Direct
2006-01-26	Common Stock	S	1600	$42.62	Disposed	412648	Direct
2006-01-26	Common Stock	S	1500	$42.63	Disposed	411148	Direct
2006-01-26	Common stock	S	400	$42.64	Disposed	410748	Direct
2006-01-26	Common Stock	S	3600	$42.65	Disposed	407148	Direct
2006-01-26	Common Stock	S	600	$42.66	Disposed	406548	Direct
2006-01-26	Common Stock	S	300	$42.68	Disposed	406248	Direct
2006-01-26	Common Stock	S	100	$42.69	Disposed	406148	Direct
2006-01-26	Common Stock	S	100	$42.70	Disposed	406048	Direct
2006-01-26	Common Stock	S	100	$42.71	Disposed	405948	Direct
2006-01-26	Common Stock	S	1100	$42.72	Disposed	404848	Direct
2006-01-26	Common Stock	S	300	$42.77	Disposed	404548	Direct
2006-01-26	Common Stock	S	600	$42.79	Disposed	403948	Direct
2006-01-26	Common Stock	F	58900	$42.55	Disposed	345048	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2006-01-25	Employee Stock Options (Right to Buy)	$16.333	M	96900	Disposed	2006-10-08	Common Stock (96900)	Direct

Footnotes

F1: Granted on 10/08/1996 under the A. O. Smith Corporation 1990 Long-Term Executive Incentive Compensation Plan, a transaction exempt under Rule 16b-3.