SMITH A O CORP - Director's Dealing 2006

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SMITH A O CORP (AOS)
CIK: 0000091142
Period of Report: 2006-04-27

Reporting Person: MASSA RONALD E (Senior Vice President)

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2006-04-27	Common Stock	M	15300	$27.25	Acquired	42906	Direct
2006-04-27	Common Stock	M	15200	$29.031	Acquired	58106	Direct
2006-04-27	Common Stock	M	25800	$28.70	Acquired	83906	Direct
2006-04-27	Common Stock	S	7200	$46.50	Disposed	76706	Direct
2006-04-27	Common Stock	S	1900	$46.51	Disposed	74806	Direct
2006-04-27	Common Stock	S	1000	$46.52	Disposed	73806	Direct
2006-04-27	Common Stock	S	2600	$46.53	Disposed	71206	Direct
2006-04-27	Common Stock	S	1000	$46.54	Disposed	70206	Direct
2006-04-27	Common Stock	S	200	$46.56	Disposed	70006	Direct
2006-04-27	Common Stock	S	1200	$46.57	Disposed	68806	Direct
2006-04-27	Common Stock	S	200	$46.58	Disposed	68606	Direct
2006-04-27	Common Stock	S	400	$46.59	Disposed	68206	Direct
2006-04-27	Common Stock	S	2400	$46.60	Disposed	65806	Direct
2006-04-27	Common Stock	S	2300	$46.61	Disposed	63506	Direct
2006-04-27	Common Stock	S	700	$46.62	Disposed	62806	Direct
2006-04-27	Common Stock	S	100	$46.64	Disposed	62706	Direct
2006-04-27	Common Stock	S	1900	$46.65	Disposed	60806	Direct
2006-04-27	Common Stock	S	1300	$46.66	Disposed	59506	Direct
2006-04-27	Common Stock	S	5800	$46.67	Disposed	53706	Direct
2006-04-27	Common Stock	S	1600	$46.68	Disposed	52106	Direct
2006-04-27	Common Stock	S	2300	$46.69	Disposed	49806	Direct
2006-04-27	Common Stock	S	10000	$46.70	Disposed	39806	Direct
2006-04-27	Common Stock	S	500	$46.71	Disposed	39306	Direct
2006-04-27	Common Stock	S	500	$46.72	Disposed	38806	Direct
2006-04-27	Common Stock	S	4500	$46.73	Disposed	34306	Direct
2006-04-27	Common Stock	S	2300	$46.74	Disposed	32006	Direct
2006-04-27	Common Stock	S	2000	$46.75	Disposed	30006	Direct

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2006-04-27	Employee Stock Options (Right to Buy)	$27.25	M	15300	Disposed	2007-10-07	Common Stock (15300)	Direct
2006-04-27	Employee Stock Options (Right to Buy)	$29.031	M	15200	Disposed	2009-10-13	Common Stock (15200)	Direct
2006-04-27	Employee Stock Options (Right to Buy)	$28.70	M	25800	Disposed	2013-10-07	Common Stock (25800)	Direct

F1: Options were granted on 10/07/1997 under the A. O. Smith Corporation 1990 Long-Term Executive Incentive Compensation Plan, a Rule 16b-3 Plan.

F2: Options were granted on 10/13/1999 under the A. O. Smith Corporation Long-Term Executive Incentive Compensation Plan, a Rule 16b-3 Plan.

F3: Options were granted on 10/07/2003 under the A. O. Smith Combined Executive Incentive Compensation Plan, a Rule 16b-3 Plan.