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 1-30 of 36
Date 5 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 2384
Price 81.73
Value 194844
Security Class A Common Stock
Date 5 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 1647
Price 85.41
Value 140670
Security Class A Common Stock
Date 5 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 968
Price 82.61
Value 79966
Security Class A Common Stock
Date 5 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Acquisition
Shares 5399
Price 13.89
Value 74992
Security Class A Common Stock
Date 5 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 400
Price 84.01
Value 33604
Security Class A Common Stock
Date 5 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 5399
Price 0.00
Value 0
Security Stock Option
Date 4 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 17543
Price 85.11
Value 1493085
Security Class A Common Stock
Date 4 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 10992
Price 86.07
Value 946081
Security Class A Common Stock
Date 4 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 9212
Price 85.11
Value 784033
Security Class A Common Stock
Date 4 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 8581
Price 87.13
Value 747663
Security Class A Common Stock
Date 4 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 2839
Price 85.77
Value 243501
Security Class A Common Stock
Date 4 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Acquisition
Shares 13351
Price 13.89
Value 185445
Security Class A Common Stock
Date 4 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 2060
Price 83.86
Value 172752
Security Class A Common Stock
Date 4 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 1300
Price 84.08
Value 109304
Security Class A Common Stock
Date 4 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 826
Price 87.91
Value 72614
Security Class A Common Stock
Date 4 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Acquisition
Shares 40002
Price 1.00
Value 40002
Security Class A Common Stock
Date 4 Jun 2026
Insider CHEAV, SOTHEARASee remarks
Side Disposal
Shares 13351
Price 0.00
Value 0
Security Stock Option
Date 4 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 40002
Price 0.00
Value 0
Security Stock Option
Date 3 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 32450
Price 89.84
Value 2915308
Security Class A Common Stock
Date 3 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 9925
Price 90.78
Value 900992
Security Class A Common Stock
Date 3 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 6295
Price 88.98
Value 560129
Security Class A Common Stock
Date 3 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 5843
Price 92.38
Value 539776
Security Class A Common Stock
Date 3 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 4300
Price 87.57
Value 376551
Security Class A Common Stock
Date 3 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 1187
Price 93.04
Value 110438
Security Class A Common Stock
Date 3 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Acquisition
Shares 60000
Price 1.00
Value 60000
Security Class A Common Stock
Date 3 Jun 2026
Insider WANG, DAVID HDirector, See Remarks, 10% Owner
Side Disposal
Shares 60000
Price 0.00
Value 0
Security Stock Option
Date 19 May 2026
Insider DUN, HAIPINGDirector
Side Disposal
Shares 1858
Price 67.54
Value 125489
Security Class A Common Stock
Date 19 May 2026
Insider DUN, HAIPINGDirector
Side Disposal
Shares 1309
Price 67.21
Value 87978
Security Class A Common Stock
Date 19 May 2026
Insider DUN, HAIPINGDirector
Side Disposal
Shares 1333
Price 63.84
Value 85099
Security Class A Common Stock
Date 19 May 2026
Insider DUN, HAIPINGDirector
Side Disposal
Shares 500
Price 65.09
Value 32545
Security Class A Common Stock