Arkolith/Insider Trading/ACMR/Form 4

Dun Haiping

DirectorACM Research, Inc. (ACMR) · full profile →Form 4 · filed Aug 20, 2026
Net Selling
Open-Market Buys
$0
Open-Market Sells
$406K
Net Open-Market Flow
-$406K
Transactions
5
4 non-derivative · 1 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Aug 18, 2026Option exercise(M)5K$5.60$28K5K
Aug 18, 2026Sell(S)1K$80.29$96K4K
Aug 18, 2026Sell(S)3K$81.31$276K400
Aug 18, 2026Sell(S)400$82.17$33K0

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Aug 18, 2026Option exercise(M)5K—$045K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001140361-26-033892) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML

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