NASDAQ:ACMR

Acm Research . Class A Stock Insider Trading

Technology > Semiconductors

Buy ACMR

*Your capital is at risk

$99.12

-4.05 (-3.93%)

At Close: Jun 23, 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 -94.03. In total, the insiders bought 1.97M and sold 1.47M 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)	-94.03
● Buy	1.97M shares
● Sell	1.47M shares
44% Buy Activity Negligible or No Correlation
Sell Signal Medium Confidence Jun 03, 2026 Analysis Breakdown: Strongly supported by a very low Insider Power Score of -94.03. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Jun 05, 2026 Sell	Class A Common Stock S-Sale	Cheav Sotheara See Remarks	Officer	1 647 Value: $140.7K
Jun 05, 2026 Sell	Class A Common Stock S-Sale	Cheav Sotheara See Remarks	Officer	400 Value: $33.6K
Jun 05, 2026 Sell	Class A Common Stock S-Sale	Cheav Sotheara See Remarks	Officer	968 Value: $80.0K
Jun 05, 2026 Sell	Class A Common Stock S-Sale	Cheav Sotheara See Remarks	Officer	2 384 Value: $194.8K
Jun 05, 2026 Buy	Class A Common Stock M-Exempt	Cheav Sotheara See Remarks	Officer	5 399 Value: $75.0K
Jun 05, 2026 Buy	Stock Option M-Exempt	Cheav Sotheara See Remarks	Officer	5 399 Value: $75.0K
Jun 04, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	10 992 Value: $946.1K
Jun 04, 2026 Sell	Class A Common Stock S-Sale	Cheav Sotheara See Remarks	Officer	2 839 Value: $243.5K
Jun 04, 2026 Sell	Class A Common Stock S-Sale	Cheav Sotheara See Remarks	Officer	9 212 Value: $784.0K
Jun 04, 2026 Sell	Class A Common Stock S-Sale	Cheav Sotheara See Remarks	Officer	1 300 Value: $109.3K
Jun 04, 2026 Buy	Class A Common Stock M-Exempt	Cheav Sotheara See Remarks	Officer	13 351 Value: $185.4K
Jun 04, 2026 Buy	Stock Option M-Exempt	Wang David H See Remarks	Officer	40 002 Value: $40.0K
Jun 04, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	826 Value: $72.6K
Jun 04, 2026 Buy	Stock Option M-Exempt	Cheav Sotheara See Remarks	Officer	13 351 Value: $185.4K
Jun 04, 2026 Buy	Class A Common Stock M-Exempt	Wang David H See Remarks	Officer	40 002 Value: $40.0K
Jun 04, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	2 060 Value: $172.8K
Jun 04, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	17 543 Value: $1.49M
Jun 04, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	8 581 Value: $747.7K
Jun 03, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	9 925 Value: $901.0K
Jun 03, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	1 187 Value: $110.4K
Jun 03, 2026 Buy	Stock Option M-Exempt	Wang David H See Remarks	Officer	60 000 Value: $60.0K
Jun 03, 2026 Buy	Class A Common Stock M-Exempt	Wang David H See Remarks	Officer	60 000 Value: $60.0K
Jun 03, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	4 300 Value: $376.6K
Jun 03, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	6 295 Value: $560.1K
Jun 03, 2026 Sell	Class A Common Stock S-Sale	Wang David H See Remarks	Officer	32 450 Value: $2.92M

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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