CHARLES PAPPIS

• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings

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Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other

Notification date	Transaction date	Company	B/S Transaction type	Nb. shares Price Value	Number of shares	Price	Value
2026-04-21	2026-04-17	ACM Research Inc (ACMR)	PlS Planned sale	52,886 -4.5% 119.15 US$373,116	52,886 -4.5%	119.15	US$373,116
2026-04-17	2026-04-17	ACM Research Inc (ACMR)	PrS Proposed sale	32,988 225.90 US$4,388,292	32,988	225.90	US$4,388,292
2026-03-09	2026-03-05	ACM Research Inc (ACMR)	PlS Planned sale	91,561 -24.1% 209.16 US$4,216,642	91,561 -24.1%	209.16	US$4,216,642
2026-03-05	2026-03-05	ACM Research Inc (ACMR)	PrS Proposed sale	5,000 50.10 US$250,485	5,000	50.10	US$250,485