ACM Research, Inc. (ACMR) Insider Trading

Over the last 3 months, ACMR insiders made 0 open-market buys and 23 sales, a net sale of -$11.0M (SEC Form 4). Over the last 6 months, 191 institutions increased and 203 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
23
Net (3m)
-$11.0M
Insider trades by month Buys Sells
Nov
Dec
Mar
Apr
May
Jun
Context3-month price +222.5%Institutions mixed (13F)
DateInsiderTypeSharesPrice
Jun 5, 2026Cheav Sothearaofficer: See remarksSell968$82.61
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell9,925$90.78
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell6,295$88.98
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksOption40,002$1.00
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell4,300$87.57
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell5,843$92.38
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell10,992$86.07
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksOption60,000$1.00
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell8,581$87.13
Jun 5, 2026Cheav Sothearaofficer: See remarksOption13,351$13.89
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell32,450$89.84
Jun 5, 2026Cheav Sothearaofficer: See remarksSell2,839$85.77
Jun 5, 2026Cheav Sothearaofficer: See remarksSell1,300$84.08
Jun 5, 2026Cheav Sothearaofficer: See remarksSell2,384$81.73
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell17,543$85.11
Jun 5, 2026Cheav Sothearaofficer: See remarksOption5,399$13.89
Jun 5, 2026Cheav Sothearaofficer: See remarksSell400$84.01
Jun 5, 2026Cheav Sothearaofficer: See remarksSell1,647$85.41
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell1,187$93.04
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell2,060$83.86
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell826$87.91
Jun 5, 2026Cheav Sothearaofficer: See remarksSell9,212$85.11
May 21, 2026Dun HaipingdirectorSell1,309$67.21
May 21, 2026Dun HaipingdirectorSell500$65.09
May 21, 2026Dun HaipingdirectorSell1,858$67.54
May 21, 2026Dun HaipingdirectorOption5,000$5.60
May 21, 2026Dun HaipingdirectorSell1,333$63.84
Apr 21, 2026Pappis Charles CdirectorSell5,000$52.00
Apr 21, 2026Pappis Charles CdirectorOption5,000$29.18
Mar 13, 2026McKechnie Markofficer: See RemarksSell47,108$45.74

Source: ACMR SEC Form 4 filings, latest Jun 5, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their ACMR positions over the last 6 months (SEC Form 13F).

Increased
191
New positions
138
Reduced
203
Sold out
89
Largest moves
InstitutionActionSharesFiled
BLACKROCK, INC.Increased8.0MMay 13, 2026
BLACKROCK, INC.Increased7.9MFeb 12, 2026
VANGUARD GROUP INCIncreased5.0MJan 29, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position4.5MMay 15, 2026
LSV ASSET MANAGEMENTReduced2.4MFeb 6, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position2.2MMay 8, 2026
JANUS HENDERSON GROUP PLCIncreased2.2MMay 18, 2026
STATE STREET CORPIncreased2.0MMay 15, 2026
STATE STREET CORPReduced2.0MFeb 13, 2026
TRIATA CAPITAL LTDReduced1.9MFeb 17, 2026
WCM INVESTMENT MANAGEMENT, LLCIncreased1.9MMay 7, 2026
SOUTHEASTERN ASSET MANAGEMENT INC/TN/Increased1.7MFeb 13, 2026
CITIGROUP INCIncreased1.6MMay 11, 2026
MORGAN STANLEYIncreased1.4MFeb 13, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased1.4MMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.

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