ACM Research, Inc. (ACMR) Insider Trading

Over the last 3 months, ACMR insiders made 0 open-market buys and 27 sales, a net sale of -$15.0M (SEC Form 4). Over the last 6 months, 202 institutions increased and 201 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
27
Net (3m)
-$15.0M
Insider trades by month Buys Sells
Sep
Nov
Dec
Mar
Apr
May
Context3-month price +86.7%Institutions mixed (13F)
DateInsiderTypeSharesPrice
May 21, 2026Dun HaipingdirectorSell1,309$67.21
May 21, 2026Dun HaipingdirectorSell1,858$67.54
May 21, 2026Dun HaipingdirectorSell1,333$63.84
May 21, 2026Dun HaipingdirectorOption5,000$5.60
May 21, 2026Dun HaipingdirectorSell500$65.09
Apr 21, 2026Pappis Charles CdirectorSell5,000$52.00
Apr 21, 2026Pappis Charles CdirectorOption5,000$29.18
Mar 13, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksOption60,000$1.00
Mar 13, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell10,561$44.92
Mar 13, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell702$46.57
Mar 13, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell4,627$48.34
Mar 13, 2026McKechnie Markofficer: See RemarksSell29,348$45.74
Mar 13, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksOption50,000$1.00
Mar 13, 2026McKechnie Markofficer: See RemarksSell564$46.57
Mar 13, 2026McKechnie Markofficer: See RemarksSell47,108$45.74
Mar 13, 2026McKechnie Markofficer: See RemarksSell982$46.55
Mar 13, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell55,373$47.89
Mar 13, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell38,737$45.74
Mar 13, 2026McKechnie Markofficer: See RemarksSell8,639$44.94
Mar 13, 2026McKechnie Markofficer: See RemarksOption60,000$13.89
Mar 13, 2026McKechnie Markofficer: See RemarksSell11,910$44.89
Mar 13, 2026McKechnie Markofficer: See RemarksOption38,551$19.49
Mar 12, 2026Liu TracydirectorSell32,216$47.06
Mar 12, 2026Liu TracydirectorOption45,000$1.00
Mar 12, 2026Liu TracydirectorSell3,377$48.25
Mar 12, 2026Liu TracydirectorSell11,623$47.81
Mar 12, 2026Liu TracydirectorSell12,784$48.19
Mar 12, 2026Liu TracydirectorOption15,000$1.00
Mar 11, 2026Dun HaipingdirectorSell4,100$43.37
Mar 11, 2026Dun HaipingdirectorSell900$43.94

Source: ACMR SEC Form 4 filings, latest May 21, 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
202
New positions
130
Reduced
201
Sold out
85
Largest moves
InstitutionActionSharesFiled
BLACKROCK, INC.Increased8.0MMay 13, 2026
BLACKROCK, INC.Increased7.9MFeb 12, 2026
VANGUARD GROUP INCIncreased5.0MJan 29, 2026
LSV ASSET MANAGEMENTReduced2.4MFeb 6, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position2.3MMay 15, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position2.2MMay 8, 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
MORGAN STANLEYIncreased1.4MFeb 13, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased1.4MMay 15, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased1.3MFeb 9, 2026
INVESCO LTD.Increased1.3MFeb 19, 2026

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

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