Company Insider Tape

Acm Research Inc insider transactions

Executive and director filing history, acquisition and disposal balance, executive concentration, cadence, and stored market context.

Symbol ACMR Latest filing 5 Jun 2026

Company Read

Net disposal

ACMR has 36 stored insider filings. Acquisitions account for 19.4% of classified filings and disposals account for 80.6%. The largest stored filing is $2.9M from WANG, DAVID H.

Latest filing 5 Jun 2026most recent stored row
Largest filing $2.9Mreported transaction value
Total filings 36stored transaction rows
Acquisition value $534.3K7 acquisitions
Disposal value $11.0M29 disposals
Net value $-10.5Macquisitions minus disposals

Filing cadence

Last 12 active months
Apr 2026 3
May 2026 7
Jun 2026 26

Acquisitions 19.4% · Disposals 80.6%

Apr 2026 $405.9K
May 2026 $359.1K
Jun 2026 $10.8M

Executive concentration

By filing count
WANG, DAVID H Director, See Remarks, 10% Owner · 16 filings
CHEAV, SOTHEARA See remarks · 11 filings
DUN, HAIPING Director · 6 filings
PAPPIS, CHARLES C Director · 3 filings

Market Context

ACMR weekly market snapshot

Week 31 Jul 2026
Latest close 78.47 USDstored weekly close
1-week move -6.9%latest weekly bar
13-week move -19.7%medium-term context
Relative Strength 38.5Sharemaestro indicator
Fair value gap +146.8%price vs fair value
Trend signal 1smoothed trend state

Transaction History

Latest insider filings for ACMR

Showing 31-36 of 36
Date 19 May 2026
Insider DUN, HAIPINGDirector
Side Acquisition
Shares 5000
Price 5.60
Value 28000
Security Class A Common Stock
Date 19 May 2026
Insider DUN, HAIPINGDirector
Side Disposal
Shares 5000
Price 0.00
Value 0
Security Stock Option
Date 13 May 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Acquisition
Shares 6208
Price 0.00
Value 0
Security Restricted Stock Units
Date 17 Apr 2026
Insider PAPPIS, CHARLES CDirector
Side Disposal
Shares 5000
Price 52.00
Value 260000
Security Class A Common Stock
Date 17 Apr 2026
Insider PAPPIS, CHARLES CDirector
Side Acquisition
Shares 5000
Price 29.18
Value 145900
Security Class A Common Stock
Date 17 Apr 2026
Insider PAPPIS, CHARLES CDirector
Side Disposal
Shares 5000
Price 0.00
Value 0
Security Stock Option