X0306 4 2017-02-10 0000091142 SMITH A O CORP AOS 0001464950 BROUWER WILFRIDUS M A. O. SMITH HOLDINGS (BARBADOS) SRL 8/F AIA KOWLOON TOWER, 100 HOW MING ST. KOWLOON CITY K3 HONG KONG 0 1 0 0 President - AOSHBSRL Common Stock 2017-02-10 4 M 0 4000 49.86 A 37964 D Common Stock 2017-02-10 4 F 0 1800 49.86 D 36164 D Restricted Stock Units 49.86 2017-02-10 4 M 0 4000 0 D Common Stock 4000 5930 D Employee Stock Options (Right to Buy) 0 Common Stock 0 26244 D 4,000 Restricted Stock Units were granted on 02/10/2014, under the A. O. Smith Combined Incentive Compensation Plan, a transaction exempt under Rule 16b-3. 4,000 Restricted Stock Units vested on 02/10/2017. As a result of vesting, the Company is obligated to deliver 4,000 shares of Common Stock to the reporting person. On October 5, 2016, the common stock of A. O. Smith Corporation split 2-for1, resulting in the reporting person's ownership of 16,982 additional shares of Common Stock. On October 5, 2016, the common stock of A. O. Smith Corporation split 2-for1, resulting in the reporting person's ownership of 4,965 additional Restricted Stock Units. On October 5, 2016, the common stock of A. O. Smith Corporation split 2-for1, resulting in the reporting person's ownership of 13,122 additional Employee Stock Options. James F. Stern, Attorney-in-Fact for Wilfridus M. Brouwer 2017-02-13