NASDAQ:ACMR

Acm Research . Class A Stock Insider Trading

Technology > Semiconductors

Buy ACMR

*Your capital is at risk

$91.92

+9.87 (+12.03%)

At Close: Jun 02, 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
Dec 08, 2025 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	22 500 Value: $797.6K
Dec 08, 2025 Buy	Class A Common Stock M-Exempt	Mckechnie Mark See Remarks	Officer	22 500 Value: $572.6K
Dec 08, 2025 Buy	Stock Option M-Exempt	Mckechnie Mark See Remarks	Officer	22 500 Value: $572.6K
Dec 04, 2025 Buy	Stock Option M-Exempt	Mckechnie Mark See Remarks	Officer	8 750 Value: $39.8K
Dec 04, 2025 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	996 Value: $34.1K
Dec 04, 2025 Buy	Class A Common Stock M-Exempt	Mckechnie Mark See Remarks	Officer	8 750 Value: $39.8K
Dec 04, 2025 Sell	Class A Common Stock S-Sale	Mckechnie Mark See Remarks	Officer	7 754 Value: $259.8K
Dec 04, 2025 Buy	Class A Common Stock M-Exempt	Wang David H See Remarks	Officer	60 000 Value: $60.0K
Dec 04, 2025 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	19 817 Value: $664.3K
Dec 04, 2025 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	40 183 Value: $1.38M
Dec 04, 2025 Buy	Stock Option M-Exempt	Wang David H See Remarks	Officer	60 000 Value: $60.0K
Dec 03, 2025 Buy	Stock Option M-Exempt	Wang David H See Remarks	Officer	70 000 Value: $70.0K
Dec 03, 2025 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	1 200 Value: $40.3K
Dec 03, 2025 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	68 800 Value: $2.27M
Dec 03, 2025 Buy	Class A Common Stock M-Exempt	Wang David H See Remarks	Officer	70 000 Value: $70.0K
Dec 03, 2025 Sell	Class A Common Stock S-Sale	Chen Fuping See Remarks	Officer	300 Value: $10.1K
Dec 03, 2025 Sell	Class A Common Stock S-Sale	Chen Fuping See Remarks	Officer	19 700 Value: $651.1K
Dec 03, 2025 Buy	Stock Option M-Exempt	Chen Fuping See Remarks	Officer	20 000 Value: $35.4K
Dec 03, 2025 Buy	Class A Common Stock M-Exempt	Chen Fuping See Remarks	Officer	20 000 Value: $35.4K
Dec 02, 2025 Sell	Class A Common Stock S-Sale	Chen Fuping See Remarks	Officer	100 000 Value: $3.32M
Dec 02, 2025 Buy	Class A Common Stock M-Exempt	Chen Fuping See Remarks	Officer	100 000 Value: $177.0K
Dec 02, 2025 Buy	Stock Option M-Exempt	Chen Fuping See Remarks	Officer	100 000 Value: $177.0K
Nov 13, 2025 Buy	Stock Option M-Exempt	Feng Lisa See Remarks	Officer	15 000 Value: $84.0K
Nov 13, 2025 Sell	Class A Common Stock S-Sale	Feng Lisa See Remarks	Officer	15 000 Value: $506.6K
Nov 13, 2025 Buy	Class A Common Stock M-Exempt	Feng Lisa See Remarks	Officer	15 000 Value: $84.0K

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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