X0306 4 2016-02-11 0000091142 SMITH A O CORP AOS 0001464950 BROUWER WILFRIDUS M A. O. SMITH HOLDINGS (BARBADOS) SRL 6/F LUK KWOK CENTRE, 72 GLOCESTER ROAD WAN CHAI K3 99907 HONG KONG 0 1 0 0 President - AOSHBSRL Common Stock 2016-02-11 4 M 0 2600 63.335 A 18285 D Common Stock 2016-02-12 4 S 0 1303 65.7464 D 16982 D Restricted Stock Units 63.335 2016-02-11 4 M 0 2600 D Common Stock 2600 4965 D 2,600 Restricted Stock Units were granted on 02/11/2013, under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3. 2,600 Restricted Stock Units vested on 02/11/2016. As a result of vesting, the Company is obligated to deliver 2,600 shares of Common Stock to the reporting person. The reporting person sold these shares to obtain funds to pay the withholding taxes due as a result of the vesting of the restricted stock units described in footnote (1). James F. Stern, Attorney-in-Fact for Wilfridus M. Brouwer 2016-02-16