NASDAQ:ACMR

Acm Research . Class A Stock Insider Trading

Technology > Semiconductors

Buy ACMR

*Your capital is at risk

$88.86

-3.06 (-3.33%)

At Close: Jun 03, 2026

ACM Research . Class A Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -89.55. In total, the insiders bought 3.03M and sold 1.49M ACMR shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-89.55
● Buy	3.03M shares
● Sell	1.49M shares
54% Buy Activity Negligible or No Correlation
Buy Signal Low Confidence Mar 12, 2026 Analysis Breakdown: Signal is highly questionable due to a strongly contradictory negative Insider Power Score of -89.55. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
May 19, 2026 Sell	Class A Common Stock S-Sale	Dun Haiping Director	Director	1 858 Value: $125.5K
May 19, 2026 Sell	Class A Common Stock S-Sale	Dun Haiping Director	Director	1 309 Value: $88.0K
May 19, 2026 Sell	Class A Common Stock S-Sale	Dun Haiping Director	Director	500 Value: $32.5K
May 19, 2026 Sell	Class A Common Stock S-Sale	Dun Haiping Director	Director	1 333 Value: $85.1K
May 19, 2026 Buy	Stock Option M-Exempt	Dun Haiping Director	Director	5 000 Value: $28.0K
May 19, 2026 Buy	Class A Common Stock M-Exempt	Dun Haiping Director	Director	5 000 Value: $28.0K
Apr 17, 2026 Buy	Class A Common Stock M-Exempt	Pappis Charles C Director	Director	5 000 Value: $145.9K
Apr 17, 2026 Sell	Class A Common Stock S-Sale	Pappis Charles C Director	Director	5 000 Value: $260.0K
Apr 17, 2026 Buy	Stock Option M-Exempt	Pappis Charles C Director	Director	5 000 Value: $145.9K
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	702 Value: $32.7K
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	38 737 Value: $1.77M
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	982 Value: $45.7K
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	564 Value: $26.3K
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	29 348 Value: $1.34M
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	47 108 Value: $2.15M
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	8 639 Value: $388.2K
Mar 12, 2026 Buy	Class A Common Stock M-Exempt	Mckechnie Mark See Remarks	Officer	38 551 Value: $751.4K
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	11 910 Value: $534.6K
Mar 12, 2026 Buy	Class A Common Stock M-Exempt	Wang David H See Remarks	Officer	50 000 Value: $50.0K
Mar 12, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	10 561 Value: $474.4K
Mar 12, 2026 Buy	Stock Option M-Exempt	Mckechnie Mark See Remarks	Officer	60 000 Value: $833.4K
Mar 12, 2026 Buy	Stock Option M-Exempt	Wang David H See Remarks	Officer	50 000 Value: $50.0K
Mar 12, 2026 Buy	Stock Option M-Exempt	Mckechnie Mark See Remarks	Officer	38 551 Value: $751.4K
Mar 12, 2026 Buy	Class A Common Stock M-Exempt	Mckechnie Mark See Remarks	Officer	60 000 Value: $833.4K
Mar 11, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	4 627 Value: $223.7K

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT ACM RESEARCH INC. CLASS A

ACM Research, Inc., together with its subsidiaries, develops, manufactures, and sells single-wafer wet cleaning equipment for enhancing the manufacturing process and yield for integrated chips worldwide. It offers space alternated phase shift technology for flat and patterned wafer surfaces, which employs alternating phases of megasonic waves to deliver megasonic energy in a uniform manner on a microscopic level; timely energized bubble oscillati...

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