SMITH A O CORP — Director's Dealing 2006

Apr 24, 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SMITH A O CORP (AOS)
CIK: 0000091142
Period of Report: 2006-04-21

Reporting Person: ROMOSER W DAVID (V.P., General Counsel & Sec.)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-01-30	Common Stock	G	1000	—	Disposed	54994	Direct
2006-04-21	Common Stock	M	10650	$27.25	Acquired	65644	Direct
2006-04-21	Common Stock	M	16200	$18.313	Acquired	81844	Direct
2006-04-21	Common Stock	F	16807	$49.665	Disposed	65037	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2006-04-21	Employee Stock Options (Right to Buy)	$27.25	M	10650	Disposed	2007-10-07	Common Stock (10650)	Direct
2006-04-21	Employee Stock Options (Right to Buy)	$18.313	M	16200	Disposed	2008-10-06	Common Stock (16200)	Direct

Footnotes

F1: Gift.

F2: Granted on October 7, 1997 under the A. O. Smith Corporation 1990 Long-Term Executive Incentive Compensation Plan, a Rule 16b-3 Plan.

F3: Granted on October 6, 1998 under the A. O. Smith Corporation 1990 Long-Term Executive Incentive Compensation Plan, a Rule 16b-3 Plan.