ACMR insider transactions

Officer Cheav Sotheara exercised 18,750 shares at a strike of $13.89 and sold $1,585,923 worth of shares (18,750 units at $84.58) as part of a pre-agreed trading plan (SEC Form 4)

Officer Wang David H sold $8,835,388 worth of shares (100,002 units at $88.35) as part of a pre-agreed trading plan and exercised 100,002 shares at a strike of $1.00 (SEC Form 4)

Director Dun Haiping exercised 5,000 shares at a strike of $5.60 and sold $331,111 worth of shares (5,000 units at $66.22) as part of a pre-agreed trading plan (SEC Form 4)

SEC Form 4 filed by Pappis Charles C

Officer Mckechnie Mark sold $4,491,952 worth of shares (98,551 units at $45.58) and exercised 98,551 shares at a strike of $16.08 (SEC Form 4)

Officer Wang David H exercised 110,000 shares at a strike of $1.00 and sold $5,154,405 worth of shares (110,000 units at $46.86) (SEC Form 4)

Director Liu Tracy exercised 60,000 shares at a strike of $1.00 and sold $2,850,782 worth of shares (60,000 units at $47.51) (SEC Form 4)

SEC Form 4 filed by ACM Research Inc.

Director Pappis Charles C sold $250,450 worth of shares (5,000 units at $50.09) and exercised 5,000 shares at a strike of $29.18 (SEC Form 4)

Officer Feng Lisa exercised 30,000 shares at a strike of $4.55 and sold $1,441,290 worth of shares (30,000 units at $48.04) (SEC Form 4)

SEC Form 4 filed by Officer Wang David H

Officer Mckechnie Mark exercised 31,250 shares at a strike of $19.60 and sold $1,091,507 worth of shares (31,250 units at $34.93) (SEC Form 4)

Officer Wang David H exercised 130,000 shares at a strike of $1.00 and sold $4,361,477 worth of shares (130,000 units at $33.55) (SEC Form 4)

Officer Chen Fuping exercised 120,000 shares at a strike of $1.77 and sold $3,981,156 worth of shares (120,000 units at $33.18) (SEC Form 4)

Director Dun Haiping gifted 755,090 shares, closing all direct ownership in the company (SEC Form 4)

Officer Feng Lisa exercised 30,000 shares at a strike of $5.60 and sold $997,950 worth of shares (30,000 units at $33.27) (SEC Form 4)

SEC Form 4 filed by Officer Wang David H

Officer Wang David H exercised 130,000 shares at a strike of $1.00, increasing direct ownership by 19% to 802,708 units (SEC Form 4)

Officer Cheav Sotheara exercised 10,000 shares at a strike of $13.89 and sold $350,000 worth of shares (10,000 units at $35.00) (SEC Form 4)

Officer Wang Jian exercised 30,000 shares at a strike of $5.60 and sold $1,050,000 worth of shares (30,000 units at $35.00) (SEC Form 4)

Director Liu Tracy exercised 15,000 shares at a strike of $1.00 and sold $495,000 worth of shares (15,000 units at $33.00) (SEC Form 4)

Officer Wang David H exercised 130,000 shares at a strike of $1.00 and sold $3,459,787 worth of shares (130,000 units at $26.61) (SEC Form 4)

Officer Cheav Sotheara exercised 11,152 shares at a strike of $13.89 and sold $334,560 worth of shares (11,152 units at $30.00) (SEC Form 4)

Officer Wang Jian exercised 60,000 shares at a strike of $5.60 and sold $1,860,000 worth of shares (60,000 units at $31.00) (SEC Form 4)

SEC Form 4 filed by Director Dun Haiping

SEC Form 4 filed by Director Liu Tracy

SEC Form 4 filed by Director Pappis Charles C

Director Liu Tracy exercised 15,000 shares at a strike of $1.00 and sold $450,000 worth of shares (15,000 units at $30.00) (SEC Form 4)

Officer Feng Lisa exercised 15,000 shares at a strike of $5.60 and sold $420,000 worth of shares (15,000 units at $28.00) (SEC Form 4)

Officer Feng Lisa exercised 15,000 shares at a strike of $5.60 and sold $390,000 worth of shares (15,000 units at $26.00) (SEC Form 4)

Officer Wang David H exercised 130,000 shares at a strike of $1.00 and sold $3,009,804 worth of shares (130,000 units at $23.15) (SEC Form 4)

SEC Form 4 filed by Director Pappis Charles C

SEC Form 3 filed by new insider Pappis Charles C

Officer Mckechnie Mark exercised 15,000 shares at a strike of $5.60 and sold $378,300 worth of shares (15,000 units at $25.22) (SEC Form 4)

Director Hu Chenming sold $4,899,240 worth of shares (163,308 units at $30.00), decreasing direct ownership by 62% to 100,002 units (SEC Form 4)

Director Dun Haiping sold $275,976 worth of shares (9,518 units at $29.00), decreasing direct ownership by 1% to 755,090 units (SEC Form 4)

Officer Mckechnie Mark exercised 15,000 shares at a strike of $5.60 and sold $411,300 worth of shares (15,000 units at $27.42) (SEC Form 4)

Officer Wang David H sold $3,546,554 worth of shares (131,250 units at $27.02), decreasing direct ownership by 16% to 672,708 units (SEC Form 4)

Director Dun Haiping sold $398,127 worth of shares (15,001 units at $26.54), decreasing direct ownership by 2% to 764,608 units (SEC Form 4)

Director Dun Haiping covered exercise/tax liability with 482 shares and exercised 25,001 shares at a strike of $0.50, increasing direct ownership by 3% to 779,609 units (SEC Form 4)

Officer 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)

Officer Cheav Sotheara sold $519,754 worth of shares (22,598 units at $23.00) and exercised 22,598 shares at a strike of $13.89 (SEC Form 4)

Officer Mckechnie Mark sold $330,000 worth of shares (15,000 units at $22.00) and exercised 15,000 shares at a strike of $5.60 (SEC Form 4)

Director Dun Haiping sold $332,181 worth of shares (19,058 units at $17.43), decreasing direct ownership by 2% to 755,090 units (SEC Form 4)

Officer Wang David H sold $981,000 worth of shares (56,250 units at $17.44), decreasing direct ownership by 9% to 598,006 units (SEC Form 4)

Officer Wang David H sold $1,006,087 worth of shares (56,250 units at $17.89), decreasing direct ownership by 8% to 654,256 units (SEC Form 4)

Director Dun Haiping sold $286,800 worth of shares (15,000 units at $19.12), decreasing direct ownership by 2% to 774,148 units (SEC Form 4)

Officer Wang David H sold $1,073,250 worth of shares (56,250 units at $19.08), decreasing direct ownership by 7% to 710,506 units (SEC Form 4)

Director Dun Haiping exercised 35,000 shares at a strike of $0.50 and covered exercise/tax liability with 942 shares, increasing direct ownership by 5% to 789,148 units (SEC Form 4)

Officer Wang David H exercised 270,000 shares at a strike of $0.50 and covered exercise/tax liability with 7,262 shares, increasing direct ownership by 52% to 766,756 units (SEC Form 4)

Possible member of 10% group Shanghai Science & Technology Venture Capital (Group) Co., Ltd. sold $23,519,660 worth of shares (1,065,396 units at $22.08), decreasing direct ownership by 31% to 2,338,510 units (SEC Form 4)

Director Xing Xiao sold $23,516,561 worth of shares (1,065,396 units at $22.07) (SEC Form 4)

Officer Mckechnie Mark sold $363,352 worth of shares (16,516 units at $22.00) and exercised 16,516 shares at a strike of $5.60 (SEC Form 4)

Possible member of 10% group Shanghai Science & Technology Venture Capital (Group) Co., Ltd. sold $693,921 worth of shares (34,604 units at $20.05), decreasing direct ownership by 1% to 3,403,906 units (SEC Form 4)

Director Xing Xiao sold $693,921 worth of shares (34,604 units at $20.05) (SEC Form 4)

SEC Form 4 filed by Officer Chen Fuping

Director Dun Haiping sold $345,274 worth of shares (19,097 units at $18.08), decreasing direct ownership by 2% to 755,090 units (SEC Form 4)

Director Dun Haiping sold $297,750 worth of shares (15,000 units at $19.85), decreasing direct ownership by 2% to 774,187 units (SEC Form 4)

SEC Form 4 filed by Director Hu Chenming

SEC Form 4 filed by Director Dun Haiping