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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
91142	Smith A O Corp	AOS	Motors & Generators (3621)	390619790

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1310176	A Mark Petrarca	A. O. Smith Corporation 11270 West Park Place Milwaukee WI 53224	Senior Vice Pres. - H.r. & P.a	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2011-02-17	11,700	$25.84	32,225	No	4	M	Direct
Common Stock	Acquisiton	2011-02-17	11,250	$23.76	43,475	No	4	M	Direct
Common Stock	Disposition	2011-02-17	7,579	$42.60	35,896	No	4	S	Direct
Common Stock	Disposition	2011-02-17	1,991	$42.61	33,905	No	4	S	Direct
Common Stock	Disposition	2011-02-17	2,700	$42.62	31,205	No	4	S	Direct
Common Stock	Disposition	2011-02-17	3,121	$42.63	28,084	No	4	S	Direct
Common Stock	Disposition	2011-02-17	1,000	$42.64	27,084	No	4	S	Direct
Common Stock	Disposition	2011-02-17	1,350	$42.65	25,734	No	4	S	Direct
Common Stock	Disposition	2011-02-17	1,038	$42.66	24,696	No	4	S	Direct
Common Stock	Disposition	2011-02-17	696	$42.67	24,000	No	4	S	Direct
Common Stock	Disposition	2011-02-17	1,600	$42.68	22,400	No	4	S	Direct
Common Stock	Disposition	2011-02-17	838	$42.69	21,562	No	4	S	Direct
Common Stock	Disposition	2011-02-17	537	$42.70	21,025	No	4	S	Direct
Common Stock	Disposition	2011-02-17	500	$42.71	20,525	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Options (Right to Buy)	Disposition	2011-02-17	11,700	$0.00	11,700	$25.84
Common Stock	Employee Stock Options (Right to Buy)	Disposition	2011-02-17	11,250	$0.00	11,250	$23.76

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
51,600		2017-02-09	No	4	M	Direct
40,350		2018-02-11	No	4	M	Direct

Footnotes

The employee stock options were granted on 02/09/2007, under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under rule 16b-3. The options became exercisable in three annual installments of 1/3 of the award starting on 02/08/2008.
The employee stock options were granted on 02/11/2008, under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under rule 16b-3. The options became exercisable in three annual installments of 1/3 of the award starting on 02/11/2009.