Haiping Dun Acm Research, Inc. (ACMR) insider trading activity

Haiping Dun is of ACM Research, Inc.. Currently has a direct ownership of 779,609 shares of ACMR, which is worth approximately $20.3 Million. The most recent transaction as insider was on Mar 03, 2025, when has been sold 482 shares (Class A Common Stock) at a price of $25.94 per share, resulting in proceeds of $12,503. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 780K

3.25% 3M change

10.85% 12M change

Total Value Held $20.3 Million

Haiping Dun Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Mar 03 2025	SELL Payment of exercise price or tax liability	$12,503 $25.94 p/Share	482 Reduced 0.06%	779,609 Class A Common Stock
Mar 03 2025	BUY Exercise of conversion of derivative security	$12,500 $0.5 p/Share	25,001 Added 3.11%	780,091 Class A Common Stock
Nov 29 2024	SELL Open market or private sale	$332,180 $17.43 p/Share	19,058 Reduced 2.46%	755,090 Class A Common Stock
Nov 22 2024	SELL Open market or private sale	$286,800 $19.12 p/Share	15,000 Reduced 1.9%	774,148 Class A Common Stock
Nov 14 2024	SELL Payment of exercise price or tax liability	$17,511 $18.59 p/Share	942 Reduced 0.12%	789,148 Class A Common Stock
Nov 14 2024	BUY Exercise of conversion of derivative security	$17,500 $0.5 p/Share	35,000 Added 4.24%	790,090 Class A Common Stock
Aug 29 2024	SELL Open market or private sale	$345,273 $18.08 p/Share	19,097 Reduced 2.47%	755,090 Class A Common Stock
Aug 22 2024	SELL Open market or private sale	$297,750 $19.85 p/Share	15,000 Reduced 1.9%	774,187 Class A Common Stock
Aug 14 2024	SELL Payment of exercise price or tax liability	$17,500 $19.38 p/Share	903 Reduced 0.11%	789,187 Class A Common Stock
Aug 14 2024	BUY Exercise of conversion of derivative security	$17,500 $0.5 p/Share	35,000 Added 4.24%	790,090 Class A Common Stock
Jun 27 2024	SELL Bona fide gift	-	100,000 Reduced 11.69%	755,090 Class A Common Stock
Jun 27 2024	SELL Bona fide gift	-	300,000 Reduced 100.0%	0 Class B Common Stock
May 29 2024	SELL Open market or private sale	$435,378 $22.63 p/Share	19,239 Reduced 2.2%	855,090 Class A Common Stock
May 22 2024	SELL Open market or private sale	$343,200 $22.88 p/Share	15,000 Reduced 1.69%	874,329 Class A Common Stock
May 14 2024	SELL Payment of exercise price or tax liability	$17,518 $23.02 p/Share	761 Reduced 0.09%	889,329 Class A Common Stock
May 14 2024	BUY Exercise of conversion of derivative security	$17,500 $0.5 p/Share	35,000 Added 3.78%	890,090 Class A Common Stock
Mar 14 2024	SELL Open market or private sale	$543,180 $27.95 p/Share	19,434 Reduced 2.22%	855,090 Class A Common Stock
Mar 08 2024	SELL Open market or private sale	$455,400 $30.36 p/Share	15,000 Reduced 1.69%	874,524 Class A Common Stock
Mar 01 2024	SELL Payment of exercise price or tax liability	$17,500 $30.92 p/Share	566 Reduced 0.06%	889,524 Class A Common Stock
Mar 01 2024	BUY Exercise of conversion of derivative security	$17,500 $0.5 p/Share	35,000 Added 3.78%	890,090 Class A Common Stock
Nov 29 2023	SELL Open market or private sale	$327,474 $17.25 p/Share	18,984 Reduced 2.17%	855,090 Class A Common Stock
Nov 22 2023	SELL Open market or private sale	$264,900 $17.66 p/Share	15,000 Reduced 1.69%	874,074 Class A Common Stock
Nov 14 2023	SELL Payment of exercise price or tax liability	$17,505 $17.23 p/Share	1,016 Reduced 0.11%	889,074 Class A Common Stock
Nov 14 2023	BUY Exercise of conversion of derivative security	$17,500 $0.5 p/Share	35,000 Added 3.78%	890,090 Class A Common Stock
Aug 22 2023	SELL Open market or private sale	$444,557 $13.85 p/Share	32,098 Reduced 3.62%	855,090 Class A Common Stock

Haiping Dun

Fremont, CA

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