UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Title of each class Trading Symbol(s) Name of each exchange on which registered Class A Common Stock, $0.001 par value per share AIN The New York Stock Exchange (NYSE) Class B Common Stock, $0.001 par value per share AIN The New York Stock Exchange (NYSE) Form 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended: September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT T ...