UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Title of Each ClassTrading SymbolName of Each Exchange on Which Registered Common Stock (par value $1.00 per share) AOS New York Stock Exchange Emerging growth company ☐ FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2019. or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ...