SMITH A O CORP — Director's Dealing 2005

Oct 21, 2005

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SMITH A O CORP (AOS)
CIK: 0000091142
Period of Report: 2005-10-20

Reporting Person: O TOOLE ROBERT J (Chairman and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2005-10-20	Common Stock	M	196900	$13.563	Acquired	541948	Direct
2005-10-20	Common Stock	S	12838	$32.00	Disposed	529110	Direct
2005-10-20	Common Stock	F	132462	$32.00	Disposed	396648	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2005-10-20	Employee Stock Options (Right to Buy)	$13.563	M	196900	Disposed	2010-10-10	Common Stock (196900)	Direct

Footnotes

F1: Granted on 10/10/2000 under the A. O. Smith Corporation Long-Term Executive Incentive Compensation Plan, a transaction exempt under Rule 16b-3.