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, $0.0001 par value per share ACMR Nasdaq Global Market Large accelerated filer ☐ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☑ Emerging growth company ☑ Class Number of Shares Outstanding Class A Common Stock, $0.0001 par value 14,259,479 shares outstanding as of August 5, 2019 Class B Common Stock, $0.0001 par ...