X0304 4 2012-02-13 0000091142 SMITH A O CORP AOS 0001464950 BROUWER WILFRIDUS M A. O. SMITH (CHINA) INVESTMENT CO., LTD. TOWER A, 37F, ZHUJIANG NO. 1 BLDG. NANJING F4 210008 CHINA 0 1 0 0 Senior V.P., President and GM Employee Stock Options (Right to Buy) 45.97 2012-02-13 4 A 0 5500 0 A 2022-02-13 Common Stock 5500 31750 D Restricted Stock Units 45.97 2012-02-13 4 A 0 2000 0 A Common Stock 2000 16600 D The employee stock options were granted on 02/13/2012 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3. The options become exercisable in three annual installments of 1/3 of the award starting on 02/13/2013. The restricted stock units were granted on 02/13/2012 under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3. The restricted stock units become payable in Common Stock on the vesting date of 02/13/2015. James F. Stern, Attorney-in-Fact for Wilfridus M. Brouwer 2012-02-14