Arkolith/Insider Trading/ACMR/Form 4

Wang David H

See Remarks, Director, 10% OwnerACM Research, Inc. (ACMR) · full profile →Form 4 · filed Dec 5, 2025
Net Selling
Open-Market Buys
$0
Open-Market Sells
$4.4M
Net Open-Market Flow
-$4.4M
Transactions
8
6 non-derivative · 2 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Dec 4, 2025Option exercise(M)60K$1.00$60K863K
Dec 4, 2025Sell(S)40K$34.42$1.4M803K
Dec 4, 2025Sell(S)20K$33.52$664K843K
Dec 3, 2025Sell(S)69K$33.05$2.3M804K
Dec 3, 2025Sell(S)1K$33.56$40K803K
Dec 3, 2025Option exercise(M)70K$1.00$70K873K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Dec 4, 2025Option exercise(M)60K—$0480K
Dec 3, 2025Option exercise(M)70K—$0540K

Transaction Codes

M
Option exercise / conversion
S
Open-market sale

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001140361-25-044559) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML