Live feed16:30:27·474dINSIDERFilingvia QuantisnowOfficer Wang David H covered exercise/tax liability with 4,048 shares and exercised 210,000 shares at a strike of $0.50, increasing direct ownership by 34% to 803,958 units (SEC Form 4)ByQuantisnow·Wall Street's wire, on your screen.ACMR· ACM Research Inc.TechnologyOriginal source