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© 2026 DataHeimdall. All rights reserved.Data sourced from SEC EDGAR public filings.
Insider Trades

ACMR

ACM Research, Inc.

Superinvestors

Institutional investors holding ACMR

Consensus →
InvestorFundWeightSharesValueQuarter
Mason HawkinsLongleaf Partners – Southeastern Asset Management1.52%782,900$30.8M2026Q1
Kenneth FisherFisher Asset Management0.04%244,200$5.4M2003Q3
Dodge & CoxDodge & Cox0.00%119,892$4.7M2026Q1

Congressional Activity

Congressional data coming soon

Insider Activity

13

Total trades

$3.7M

Volume

1

Buys

8

Sells

Last trade: May 19, 2026

Insider Tradeslast 90 days

DateInsiderTypeValue
May 19, 2026Haiping DunSell$85K
May 19, 2026Haiping DunSell$33K

Congressional Tradeslast 90 days

Congressional trade data is being sourced and will appear here shortly.

May 19, 2026
Haiping Dun
Sell
$88K
May 19, 2026Haiping DunSell$125K
May 19, 2026Haiping DunOption$28K
Apr 17, 2026Haiping DunSell$260K
Apr 17, 2026Haiping DunOption$146K