SMITH A O CORP — Director's Dealing 2005

May 27, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SMITH A O CORP (AOS)
CIK: 0000091142
Period of Report: 2005-05-26

Reporting Person: BISHOP CHARLES J (Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-05-26	Common Stock	M	9750	$16.667	Acquired	27241	Direct
2005-05-26	Common Stock	M	10350	$16.333	Acquired	37591	Direct
2005-05-26	Common Stock	S	9300	$30.60	Disposed	28291	Direct
2005-05-26	Common Stock	S	5000	$30.62	Disposed	23291	Direct
2005-05-26	Common Stock	S	100	$30.63	Disposed	23191	Direct
2005-05-26	Common Stock	S	5000	$30.64	Disposed	18191	Direct
2005-05-26	Common Stock	S	300	$30.65	Disposed	17891	Direct
2005-05-26	Common Stock	S	400	$30.72	Disposed	17491	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-05-26	Employee Stock Options (Right to Buy)	$16.667	M	9750	Disposed	2005-10-10	Common Stock (9750)	Direct
2005-05-26	Employee Stock Options (Right to Buy)	$16.333	M	10350	Disposed	2006-10-08	Common Stock (10350)	Direct

Footnotes

F1: Options were granted under the A. O. Smith Corporation 1990 Long-Term Executive Incentive Compensation Plan, a Rule 16b-3 Plan.