ACM Research, Inc. (ACMR) Insider Trading

Over the last 3 months, ACMR insiders made 0 open-market buys and 24 sales, a net sale of -$15.1M (SEC Form 4). Over the last 6 months, 210 institutions increased and 209 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
24
Net (3m)
-$15.1M
Insider trades by month Buys Sells
Dec
Mar
Apr
May
Jun
Aug
Context3-month price -11.8%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
Aug 26, 2026Liu TracydirectorGrant728$96.13
Aug 26, 2026Liu TracydirectorGrant6,400$81.26
Aug 26, 2026Pappis Charles CdirectorGrant728$96.13
Aug 26, 2026Pappis Charles CdirectorGrant6,400$81.26
Aug 26, 2026Dun HaipingdirectorGrant728$96.13
Aug 26, 2026Dun HaipingdirectorGrant6,400$81.26
Aug 21, 2026McKechnie Markofficer: See RemarksSell11,209$77.89
Aug 21, 2026McKechnie Markofficer: See RemarksSell13,625$76.34
Aug 21, 2026McKechnie Markofficer: See RemarksOption25,000$13.89
Aug 21, 2026McKechnie Markofficer: See RemarksOption30,199$19.49
Aug 21, 2026McKechnie Markofficer: See RemarksSell30,365$77.45
Aug 20, 2026Dun HaipingdirectorSell400$82.17
Aug 20, 2026Dun HaipingdirectorSell3,400$81.31
Aug 20, 2026Dun HaipingdirectorOption5,000$5.60
Aug 20, 2026Dun HaipingdirectorSell1,200$80.29
Jul 6, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksGrant6,208—
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell1,187$93.04
Jun 5, 2026Cheav Sothearaofficer: See remarksSell2,384$81.73
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell32,450$89.84
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell17,543$85.11
Jun 5, 2026Cheav Sothearaofficer: See remarksOption13,351$13.89
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell5,843$92.38
Jun 5, 2026Cheav Sothearaofficer: See remarksSell2,839$85.77
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell10,992$86.07
Jun 5, 2026Cheav Sothearaofficer: See remarksSell9,212$85.11
Jun 5, 2026Cheav Sothearaofficer: See remarksSell400$84.01
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksSell8,581$87.13
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksOption60,000$1.00
Jun 5, 2026Cheav Sothearaofficer: See remarksSell1,300$84.08
Jun 5, 2026Wang David Hdirector, 10 percent owner, officer: See RemarksOption40,002$1.00

Source: ACMR SEC Form 4 filings, latest Aug 26, 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
210
New positions
196
Reduced
209
Sold out
44
Largest moves
InstitutionActionSharesFiled
BlackRock, Inc.Increased8.7MAug 7, 2026
BLACKROCK, INC.Increased8.0MMay 13, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCIncreased3.3MAug 13, 2026
VANGUARD CAPITAL MANAGEMENT LLCIncreased2.5MAug 13, 2026
Capital World InvestorsNew Position2.4MAug 12, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position2.3MMay 15, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position2.2MMay 8, 2026
STATE STREET CORPIncreased2.2MAug 7, 2026
STATE STREET CORPIncreased2.0MMay 15, 2026
WCM INVESTMENT MANAGEMENT, LLCIncreased1.9MMay 7, 2026
CITIGROUP INCIncreased1.6MMay 11, 2026
GEODE CAPITAL MANAGEMENT, LLCIncreased1.5MAug 12, 2026
JANE STREET GROUP, LLCIncreased1.4MAug 14, 2026
Tidal Investments LLCIncreased1.4MAug 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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