X0306 4 2019-08-23 0000091142 SMITH A O CORP AOS 0001775339 Gurholt Helen E A. O. SMITH CORPORATION 11270 WEST PARK PLACE MILWAUKEE WI 53224 0 1 0 0 Vice President and Controller Common Stock 2019-08-23 4 S 0 1263.459 45.8179 D 0 I 401(K) Plan Trust Common Stock 1094 D The number of underlying securities is based on the stock fund balance as of August 23, 2019 and varies from previously reported amounts due to changes in the price of A. O. Smith Corporation common stock. The actual number of shares issuable is not determinable since the stock fund is a unitized account consisting of 97.82% company stock and 2.18% money market fund. The stock account balance reflected in this report is based on an August 23, 2019, stock fund price of $45.8179. Ms. Gurholt is a participant in the A. O. Smith Dividend Reinvestment Plan ('Plan") and receives a quarterly dividend pursuant to the Plan. The total amount of dividends received was 10 shares of Common Stock. James F. Stern, Attorney-in-Fact for Helen E. Gurholt 2019-08-27