X0306 4 2017-11-21 0000091142 SMITH A O CORP AOS 0001236636 KITA JOHN J A. O. SMITH CORPORATION 11270 WEST PARK PLACE MILWAUKEE WI 53224 0 1 0 0 Executive Vice President & CFO Common Stock 2017-09-06 4 G 0 190 0 D 72677 D Common Stock 2017-11-21 4 M 0 28900 23.235 A 101577 D Common Stock 2017-11-21 4 F 0 19942 60.36 D 81635 D Common Stock 2017-11-22 4 S 0 8958 60.7797 D 72677 D Employee Stock Options (Right to Buy) 23.235 2017-11-21 4 M 0 28900 0 D 2024-02-10 Common Stock 28900 83485 D Gift The employee stock options were granted on 02/10/2014 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 02/10/2015. James F. Stern, Attorney-in-Fact for John J. Kita 2017-11-22